An inverter (10) includes a multilevel circuit having a plurality of switching elements (Q1 to Q4), converts first to third DC voltages supplied from a DC positive bus (L1), a DC neutral point bus (L2), and a DC negative bus (L3) into AC voltages, and supplies the AC voltages to a load. A control device superimposes, on a sinusoidal voltage command value, a third harmonic of the voltage command value to generate a reference AC voltage. The control device compares the reference AC voltage with a carrier signal having a peak-peak value corresponding to the DC voltage between the DC positive bus and the DC negative bus and generates a gate signal for turning on and off the plurality of switching elements (Q1-Q4). The control device detects the load factor of the power conversion device from the detection value of output current by a current detector (11). In a first case where the load factor is larger than a predetermined threshold value, the control device increases the amount of superimposition of the third harmonic wave with respect to the voltage command value as compared with a second case where the load factor is equal to or less than the threshold value.
H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
A control board (1) of an embodiment includes: a housing (2); a unit (10) that is provided on a base panel (3) in the housing; a caster (19) that is provided on a bottom portion (10d) of the unit and is capable of traveling on the base panel; an upper portion fixation panel (17) that fixes a backside upper end (10fu) of the unit at a time of storing the unit; a guide groove (32) that regulates a movement of the caster such that the unit is lowered to a fixation position toward a back side at the time of storing the unit; and a unit fixation portion (14) that fixes a backside lower end (10fd) of the unit when an entire lower surface region of the unit comes into contact with the base panel. Thereby, the control board is provided which is capable of improving a fixation performance of the unit to the housing, preventing a component inside the unit, and an electric conductor, a cable, or the like that is connected from being damaged, and improving ease and workability in taking the unit in and out of the housing.
A ground fault detection circuit (6) comprises first to fourth resistance elements (31-34). Terminals on one side of the first to third resistance elements (31-33) are respectively connected to first to third AC lines (RL, SL, TL), and terminals on the other side of the first to third resistance elements (31-33) are all connected to a terminal on one side of a fourth resistance element (34). A terminal on the other side of the fourth resistance element (34) receives a ground voltage. The ground fault detection circuit (6) comprises a determination circuit (100) which, on the basis of the inter-terminal voltage of the fourth resistance element (34), determines whether a ground fault has occurred in a power conversion device. The determination circuit (100) includes: a first comparator (36) for comparing the inter-terminal voltage of the fourth resistance element (34) with a first reference voltage (VR); and a first on-delay timer (37) for receiving the output of the first comparator (36).
H02H 3/34 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to difference between voltages or between currentsEmergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors of a three-phase system
G01R 31/50 - Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
H02H 3/16 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to fault current to earth, frame or mass
H02H 3/247 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to undervoltage or no-voltage having timing means
Provided is a power conversion device comprising: a plurality of converters that are connected in parallel with an AC circuit, are connected in parallel with a DC circuit, and perform at least one of conversion from AC power to DC power and conversion from DC power to AC power; a control circuit that controls the operation of power conversion by the plurality of converters; and a plurality of converter current detectors that each detect the magnitude of AC current flowing through each of the plurality of converters. The control circuit calculates the entire converter current total equivalent value by multiplying one converter current detection value by the number of the plurality of converters and generates a control signal for controlling the operation of the plurality of converters on the basis of the entire converter current total equivalent value. This provides the power conversion device capable of appropriately controlling the operation of the plurality of converters connected in parallel with a simpler configuration.
H02H 7/10 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for convertersEmergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for rectifiers
H02M 7/12 - Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
Provided is a power supply device comprising: a converter (12) that converts power supplied from a power supply (2) into DC power corresponding to a DC load; a current detector (16) that detects the magnitude of the current of the DC power supplied from the converter to the DC load (4); a voltage detector (18) that detects the magnitude of the voltage of the DC power supplied from the converter to the DC load; and a control device (16) that controls the operation of converting the power by the converter. The control device has: a current control mode for controlling the operation of the converter so as to output a current of constant magnitude corresponding to a current command value; and a voltage control mode for controlling the operation of the converter so as to output a voltage of constant magnitude corresponding to a voltage command value. When the current control mode is set, the control device causes a proportional integration controller (52), which controls a current calculation value so that the voltage of constant magnitude corresponding to the voltage command value is output, to set a final current command value as the initial value of the current calculation value. Thus, a power supply device in which a large fluctuation in output current can be suppressed even when switching from a current control mode to a voltage control mode is provided.
H02M 3/155 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
6.
LEARNING SYSTEM AND LEARNING METHOD FOR PREDICTION MODEL
The present disclosure relates to a learning system that sequentially learns a prediction model for a manufacturing device which has different product requirements. This learning system comprises: at least one processor; and a storage device that retains, as learning data, a parameter which uses a probability distribution to express a learning value calculated on the basis of data acquired during manufacturing and the timing at which the parameter was updated last. The at least one processor uses a prediction model corrected on the basis of the learning data to calculate a set value for controlling a manufacturing device, acquires a manufacturing performance value corresponding to a prediction value of the prediction model, computes a parameter expressing a performance value probability distribution on the basis of at least one acquired performance value, updates the learning data, and stores the learning data in a storage device.
In the present invention, a result collection unit collects actual values including an inlet-side temperature actual value and an outlet-side temperature actual value of a cooling device and an speed actual value of a rolled material, and collects the open/close state of a fill valve of each spray system. A predicted value calculation unit calculates an outlet-side temperature predicted value of the cooling device for each representative point by using the actual value of each representative point. An error change amount calculation unit calculates an error between the outlet-side temperature actual value and the outlet-side temperature predicted value of each representative point, selects two representative points from the plurality of representative points, and calculates the amount of change in the error between the two representative points. A unit-error change amount holding unit specifies, as a state-change spray system, a spray system in which the open/close state of the fill valve has changed between the two representative points, calculates a unit error change amount that is a change amount of each state-change spray system, and holds the unit error change amount for each open/close state of the fill valve of each state-change spray system. A failure diagnosis unit diagnoses a failure of the spray system on the basis of the unit error change amount held for each open/close state of the fill valve.
B21B 45/02 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
B21B 37/74 - Temperature control, e.g. by cooling or heating the rolls or the product
This uninterruptible power supply device comprises a converter (1), a bidirectional chopper (2), an inverter (3), a control device (5), and a reference voltage generation circuit (50). The converter (1) converts AC power supplied from a first AC power supply (6) into DC power and supplies the DC power to DC bus bars (Lp, Ln). The bidirectional chopper (2) is connected between a power storage device (B1) and the DC bus bars (Lp, Ln) and supplies DC power from the power storage device (B1) to the DC bus bars (Lp, Ln) during power failure of the first AC power supply (6). The inverter (3) converts the DC power received from the DC bus bars (Lp, Ln) into AC power and supplies the AC power to a load (8). The control device (5) controls any of the converter (1), the bidirectional chopper (2), and the inverter (3) according to a power supply mode of the uninterruptible power supply device so that the DC voltage of the DC bus bars (Lp, Ln) becomes a reference voltage. The reference voltage generation circuit (50) generates the reference voltage so as to satisfy the DC voltage required by each of the converter (1), the bidirectional chopper (2), and the inverter (3).
H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over
Provided is a power conversion apparatus comprising: a main circuit unit which performs conversion of power; and a control device which controls the conversion of power performed by the main circuit unit. The control device has a command value calculation unit which calculates a phase-voltage phase command value and a phase-voltage amplitude command value for an AC current to be outputted from the main circuit unit. When the occurrence of disturbance is detected in a power system, the command value calculation unit: calculates a command value for a frequency by adding a correction value for a frequency at the time of the occurrence of disturbance to a reference value for the frequency of the AC voltage outputted from the main circuit unit; and calculates the phase-voltage phase command value by multiplying the integration result of the command value for the frequency by 2π. When the occurrence of disturbance is detected in the power system, the command value calculation unit calculates the phase-voltage amplitude command value by adding a correction value for the magnitude of the AC voltage at the time of the occurrence of disturbance to a reference value for the magnitude of the AC voltage to be outputted from the main circuit unit. As a result, a power conversion apparatus and a control device therefor capable of improving continuity in coordinated operation with a power system even when disturbance occurs in a power system side are provided.
H02J 3/16 - Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
10.
SYNCHRONOUS MOTOR DRIVE DEVICE AND DRIVE CONTROL METHOD
A synchronous motor drive device according to an embodiment comprises a power conversion unit and a control unit. The power conversion unit supplies the power generated by control to a synchronous motor. The control unit selects either a first control or a second control on the basis of whether or not the control state of the synchronous motor satisfies a predetermined identification condition, said first control giving priority to linearity in a conversion request item of conversion processing and being applied to a first region, said second control giving priority to a request item other than the linearity in the conversion request item of the conversion processing and being applied to a second region, said first region and said second region being included within an application range of the conversion processing for generating a current reference for current control from a request torque reference related to control of the synchronous motor.
This power conversion device comprises: a converter (1) that converts AC power supplied from an AC power supply (6) into DC power and supplies the DC power to DC lines (L1, L3); capacitors (C1-C4) that are connected to the DC lines (L1, L3); an inverter (3) that converts the DC power received from the DC lines (L1, L3) into AC power and supplies the AC power to a load (8); and a control device (5) that controls the converter (1) so that the DC voltage (VD) of the DC lines (L1, L3) becomes a reference voltage. The control device (5) detects, on the basis of at least either the DC voltage (VD) of the DC lines (L1, L3) or the load current flowing through the load (8), a transient change in which the load (8) changes suddenly. The control device (5) temporarily increases the control responsiveness of the DC voltage (VD) by the converter (1) in response to the detection of the transient change of the load (8).
H02M 5/458 - Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC by static converters using discharge tubes or semiconductor devices to convert the intermediate DC into AC using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over
H02M 7/12 - Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
12.
POWER CONVERSION DEVICE AND SWITCHING CHARACTERISTIC ADJUSTMENT METHOD
A power conversion device according to an embodiment comprises a pressure-contact type semiconductor switching element, a drive circuit, and a connection cable. The drive circuit supplies a control signal for the semiconductor switching element. The connection cable connects the drive circuit and a control signal terminal of the semiconductor switching element and supplies the control signal to the control signal terminal of the semiconductor switching element. In the connection cable, a substantially half-rotation twist about the extension direction of the connection cable is provided at a predetermined distance away from the control signal terminal of the semiconductor switching element in the extension direction of the connection cable.
H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
H02M 7/12 - Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
13.
MATERIAL PROPERTIES PREDICTION DEVICE FOR ROLLED PRODUCTS
A material properties prediction device for rolled products includes: an approximate model creation unit that creates an approximate model offline that comprehensively predicts material properties of a group of rolled products to be manufactured on a rolling line; and a material properties prediction unit that online predicts material properties in individual three-dimensional mesh-shaped areas of a rolled product manufactured on the rolling line, by using the approximate model. The approximate model creation unit includes: a dataset creation unit that creates a dataset to be used to create approximate model, in which the dataset creation unit has a condition setting unit that sets rolling conditions for the group of rolled products, and a material calculation unit that calculates metallurgical phenomena and material properties under the rolling conditions; and a model parameter determination unit that determines parameters expressing the approximate model by using the dataset.
G05B 19/418 - Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
This uninterruptible power supply device includes: a semiconductor switch that is connected between a bypass AC power supply and a load, is turned on when the bypass AC power supply is normal, and is turned off when the bypass AC power supply has a power failure; and an inverter that converts DC power supplied from an AC power supply or a battery into AC power and supplies the AC power to the load when the bypass AC power supply has a power failure, and supplies an assist current to the load if a load current is larger than a threshold current when the bypass AC power supply is normal, the assist current being a difference between the load current and the threshold current. Therefore, even if the load current is increased by load variation, the current flowing through the semiconductor switch can be maintained at the threshold current or lower.
H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over
This capacitor and capacitor assembly according to an embodiment have a capacitor body and a plate-like terminal. The capacitor body has a planar board surface. The plate-like terminal can connect a mating component to a connection surface parallel to the board surface. The connection surface of the plate-like terminal on the positive electrode side and the connection surface of the plate-like terminal on the negative electrode side are arranged so as to be skewed from each other in the normal direction of the board surface.
H02M 3/28 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
16.
MULTILEVEL POWER CONVERSION SYSTEM, AND CIRCUITRY OF MULTILEVEL POWER CONVERSION SYSTEM
A system for preventing semiconductor elements of a power converter from breaking down due to an overvoltage by a lightning surge in a multilevel power conversion system is provided. The multilevel power conversion system includes a multilevel power converter, and a controller that includes an operation control unit that causes an operation mode of the multilevel power converter to transition to a standby mode in which power conversion is not performed between a DC input/output unit and an AC input/output unit based on a predetermined condition, and a gate signal generation unit that generates and outputs a gate signal that puts at least one of a third semiconductor switching element or a second semiconductor switching element into a conducting state or a switching state in the standby mode.
H02M 1/088 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
H02M 7/5387 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
17.
APPARATUS AND TEMPERATURE ABNORMALITY DETECTION METHOD
In an apparatus according to an embodiment, a heat-generating element that generates heat by energization is accommodated in a housing of the apparatus, and a fan provided in the housing is used to forcibly air-cool the inside of the housing. The apparatus includes a first temperature sensor, a second temperature sensor, and a controller. The first temperature sensor is disposed on the windward side of the fan in the flow of air generated by the fan, and detects the temperature on the windward side of the fan. The second temperature sensor is disposed downstream of the fan in the flow of air generated by the fan, and detects the temperature downstream of the fan. The controller detects that the air volume has decreased by using the difference between the temperature on the windward side of the fan and the temperature on the leeward side of the fan.
H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
When the processor receives execution data, the processor causes an executable program to progress based on the execution data. When the processor receives update data, the processor writes the update data into a memory and causes updating of an update program to progress. When the update of the update program is completed and the programmable device is thereafter reset, the processor ends the executable program and launches the update program as the executable program.
H02J 13/00 - Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the networkCircuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over
This power conditioner comprises: an inverter that converts DC power supplied from a DC power source into AC power and supplies the AC power to a power grid; and a control device that controls the inverter. On the basis of a first differential voltage which is the difference between a reverse-phase voltage on the AC side of the inverter and a voltage obtained by removing the high-frequency component of the reverse-phase voltage, the control device generates a reverse-phase current command for causing reverse-phase AC current to flow from the inverter. The control device performs control so as to stop the inverter when a second differential voltage, which is the difference between the reverse-phase voltage and a reverse-phase voltage command obtained by multiplying characteristics of the impedance between the inverter and the power grid by the reverse-phase current command, satisfies a threshold value condition.
H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
20.
CONTOUR DETECTION DEVICE AND SHAPE MEASUREMENT DEVICE
A contour detection device disclosed herein comprises: a camera for imaging a material to be rolled; and a processing circuit for processing a video captured by the camera. The processing circuit is configured to execute: dividing the video into a plurality of frames; identifying a plurality of target frames, in which the tip of the material to be rolled is present, among the plurality of frames; detecting a coordinate group representing the position of the material to be rolled in each target frame; calculating a coordinate conversion matrix for converting the coordinate group of each of the target frames into a preset reference coordinate group; obtaining one composite image from the plurality of target frames converted using the coordinate conversion matrix; and detecting the contour of the material to be rolled from the luminance of the composite image.
B21B 38/04 - Methods or devices for measuring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring thickness, width, diameter or other transverse dimensions of the product
A power conversion device and an electric facility according to an embodiment include semiconductor circuit units, capacitors, and a transformer. The semiconductor circuit units are provided on the input side and the output side. The capacitors are connected to the semiconductor circuits and form capacitor rows together with respective semiconductor circuits on the input side and the output side. The transformer is connected to the semiconductor circuit units of the capacitor rows on the input side and the output side. When viewed in a first direction, on one side of the transformer in a second direction orthogonal to the first direction, the capacitor rows on the input side and the output side are arranged side by side in a third direction orthogonal to the first direction and the second direction.
H02M 3/28 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
22.
VOLTAGE ABNORMALITY DETECTION DEVICE AND POWER SUPPLY DEVICE
An adder according to the present invention sets a voltage upper limit value (VU) by adding a first voltage to a sinusoidal reference voltage (VREF) for which the frequency and phase thereof match those of an AC voltage (VI). If an instantaneous value of the AC voltage (VI) exceeds the voltage upper limit value (VU), a first integrator integrates over time a first deviation (VI-VU) of the instantaneous value of the AC voltage with respect to the voltage upper limit value. A voltage rise detection circuit detects a voltage rise of the AC voltage (VI) if a first integral value obtained by the first integrator exceeds a first threshold value. A subtractor sets a voltage lower limit value (VL) by subtracting a second voltage from the reference voltage (VREF). If the instantaneous value of the AC voltage (VI) is lower than the voltage lower limit value (VL), a second integrator integrates over time a second deviation (VI-VL) of the instantaneous value of the AC voltage with respect to the voltage lower limit value. A voltage drop detection circuit detects a voltage drop of the AC voltage (VI) if a second integral value obtained by the second integrator exceeds a second threshold value.
A contamination state detection circuit (10) for detecting the contamination state of a first board of a power supply unit includes a first voltage divider circuit (22) for outputting a first divided voltage (V1) to a first node (N11). The first voltage divider circuit (22) includes a first resistance circuit (24) connected between a first power supply terminal (18) and the first node (N11), and a first resistance element (R1) connected between the first node (N11) and a second power supply terminal (20). The first resistance circuit (24) includes a plurality of second wiring patterns (WP1 to WP4) formed on a second board (11), and a plurality of second resistance elements (RA1 to RA4) having mutually different resistance values. The plurality of second wiring patterns (WP1 to WP4) have mutually different wiring widths equal to or less than the wiring width of a first wiring pattern formed on the first board. The plurality of second resistance elements (RA1 to RA4) are respectively connected in series with the plurality of second wiring patterns (WP1 to WP4) between the first power supply terminal (18) and the first node (N11). The contamination state detection circuit (10) detects the contamination state of the first wiring pattern on the basis of the first divided voltage (V1).
H02H 3/00 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection
H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over
TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION (Japan)
Inventor
Arita, Ren
Abstract
An electrode unit in an active gas generation apparatus according to the present disclosure includes a ground conductor provided to a lower side of a ground side electrode constituting part. A chassis bottom part of a chassis includes a chassis opening part, and the chassis opening part includes a lower side tapered region having a larger opening area with decreasing distance to a lower side and an upper side region. A plurality of gas ejection ports provided in the ground conductor are provided to get closer to each other with decreasing distance to the lower side so that plural pieces of partial active gas collide with each other in a collision region, and the collision region is located in the lower side tapered region or in the upper side region on an upper side of the lower side tapered region.
This table roll control device of a hot rolling line controls the rotation speed of individual table rolls so that a rolled material is transported at a target speed. A table roll control device comprises: a collection unit that collects imaging data from a camera for capturing an image of a roughing mill and a table roll together with a rolled material, and registers the collected imaging data in a database; a transport speed detection unit that detects the transport speed of the rolled material from the imaging data collected by the collection unit; and a feedback control unit that performs feedback control of the rotation speed of the table roll so that the transport speed detected by the transport speed detection unit matches a target speed.
B21B 39/00 - Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
B21B 38/00 - Methods or devices for measuring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
B21B 39/02 - Feeding or supporting workBraking or tensioning arrangements
Provided is a power conversion device comprising: a converter that is connected to a solar panel and also connected to an alternating current power system and that converts direct current power supplied from the solar panel to alternating current power corresponding to the power system and supplies the converted alternating current power to the power system side; and a control circuit for controlling the operation of power conversion by the converter. The control circuit has a cold-weather operation mode for: engaging a direct current switch when a direct current voltage of the solar panel reaches or exceeds a predetermined voltage that is lower than a lower limit value of a stipulated range; when the direct current voltage of the solar panel reaches or exceeds the lower limit value of the stipulated range, engaging an alternating current switch and controlling operation of the converter so that a direct current voltage of a charge accumulation element will be constant at a maximum value of an alternating current voltage of the power system; and starting up the converter when the direct current power of the solar panel reaches or exceeds a predetermined power. Provided thereby is a power conversion device making it possible to more appropriately start up operation of power conversion even when the outside air temperature is low.
H02H 7/122 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for convertersEmergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for rectifiers for static converters or rectifiers for inverters, i.e. DC/AC converters
H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
28.
POWER CONVERSION DEVICE AND BRACE FOR POWER CONVERSION DEVICE
This power conversion device comprises: an enclosure; a plurality of power converters arranged vertically; first and second support posts, each of which stands vertically inside the enclosure and supports the plurality of power converters; and a brace extending in a designated direction and connected to the first support post and the second support post. The first support post has a raised part to which the brace is connected. The brace includes: an insulating rodlike member having an end part and extending in the designated direction; and a securing member, connected to the end part, for securing the brace to the raised part. The securing member has: a base part extending in the designated direction and connected to the end part; and a connecting part branching off from the base part in two limbs so as to envelop the raised part from two sides, and connected to the raised part by means of a pin.
H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
29.
OZONE GENERATION DEVICE AND METHOD FOR ATTACHING OBJECT-TRANSFER INTERNAL MEMBER
The purpose of the present disclosure is to provide an ozone generation device that can, in a structure having an object-transfer internal member, reduce environmental load and extend service life without decreasing the efficiency of use. In the present disclosure, an outer frame member (31) has an opening (31b), and an object-transfer internal member (32) is provided in the opening (31b). The object-transfer internal member (32) has a diameter variation property in which the member diameter (d2) becomes less than the opening diameter (d1) of the opening (31) at a cooling temperature (T1) or lower, and the member diameter (d2) becomes equal to or greater than the opening diameter (d1) in a non-cooling temperature range (TH). At a boundary surface (33) between the outer circumferential surface of the object-transfer internal member (32) and the inner circumferential surface of the opening (31b), the object-transfer internal member (32) and the opening (31b) are tightly attached to each other without having another member interposed therebetween.
C01B 13/11 - Preparation of ozone by electric discharge
B23P 11/02 - Connecting or disconnecting metal parts or objects by metal-working techniques, not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluidsConnecting or disconnecting metal parts or objects by metal-working techniques, not otherwise provided for by making force fits
The purpose of the present invention is to provide a base surface treatment device for improving utilization efficiency of treatment liquid mist with respect to a surface of a base. An exhaust mechanism (31) in this substrate surface treatment device (101) of the present disclosure is disposed below a transport stage (2) that moves along a transport path (R2), and has an exhaust port (A31) in a region that overlaps the transport path (R2) in plan view. The exhaust mechanism (31) takes in a treatment liquid mist gas (22) from the exhaust port (A31) and executes exhaust treatment for exhausting air to outside of a surface treatment chamber (51). By this exhaust treatment, a mist gas circulation path (22a) including a region in the vicinity of the base surface along the surface of a base (1) is formed.
H01L 21/205 - Deposition of semiconductor materials on a substrate, e.g. epitaxial growth using reduction or decomposition of a gaseous compound yielding a solid condensate, i.e. chemical deposition
H01L 21/31 - Treatment of semiconductor bodies using processes or apparatus not provided for in groups to form insulating layers thereon, e.g. for masking or by using photolithographic techniquesAfter-treatment of these layersSelection of materials for these layers
H01L 21/306 - Chemical or electrical treatment, e.g. electrolytic etching
This maintenance support system includes a data storage device, an abnormality degree determination unit, a restoration time calculation unit, a maintenance evaluation unit, and a maintenance display unit. The data storage device stores, as records data acquired from measuring instruments installed in a steel plant, an abnormality occurrence time point, an abnormality occurrence location, a degree of abnormality, a maintenance method, a restoration time point at which an abnormal condition is restored to a normal condition due to execution of maintenance, a maintenance execution location, and a skill level of a person in charge who has executed the maintenance. The abnormality degree determination unit determines a degree of abnormality when an abnormality occurs in rolling equipment. The restoration time calculation unit calculates, for each of a plurality of past abnormalities having the same degree of abnormality as the degree of abnormality determined by the abnormality degree determination unit, a restoration time from the abnormality occurrence time point to the restoration time point due to execution of the maintenance. The maintenance evaluation unit uses a distance from the abnormality occurrence location to the maintenance execution location and the skill level to evaluate a predetermined number of maintenance methods with short restoration times calculated by the restoration time calculation unit. The maintenance display unit displays the maintenance method most highly evaluated by the maintenance evaluation unit on a display device.
B21C 51/00 - Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses
G05B 19/418 - Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
32.
DISCONNECTION DETECTION DEVICE AND DISCONNECTION DETECTION METHOD
Provided is a disconnection detection device (10) comprising: a measurement circuit (12) that is connected to at least one cable of a pair of cables (6a, 6b) between a solar panel (3) and a power conversion device (4) and that inputs a measurement signal into the at least one cable when the power conversion device (4) is stopped, thereby measuring measurement data relating to disconnection of the pair of cables (6a, 6b) at each optional timing; a storage unit (14) that stores a determination value based on measurement data measured by the measurement circuit (12); and a detection unit (16) that compares the determination value with the measurement data measured by the measurement circuit (12) after the storage unit (14) has stored the determination value and that detects, if the measurement data has changed by a prescribed amount or greater with respect to the determination value, a disconnection of the pair of cables (6a, 6b) and outputs an alarm signal. As a result, a disconnection detection device and a disconnection detection method that can be used to more easily set a determination value can be provided.
An uninterruptible power source device (10) is connected to an AC system (1) and a DC grid (6). The DC grid (6) includes a DC bus (7) connected to the AC system (1) through an AC/DC converter (5), a distributed power source (61) that outputs the generated DC power to the DC bus, and a DC load (65) that receives the DC power of the DC bus (7). The uninterruptible power source device (10) comprises: a DC link (12) for transmitting/receiving DC power; a converter (11) that converts AC power supplied from the AC system (1) into DC power and supplies the DC power to the DC link (12); an inverter (14) that converts DC power received from the DC link (12) into AC power and supplies the AC power to an AC load (8); and a DC/DC converter (16) that has a first DC terminal (T1) connected to the DC link (12), a second DC terminal (T2) connected to a power storage device (9), and a third DC terminal (T3) connected to the DC bus (7), and is configured to redistribute DC power between the first to third DC terminals.
H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
34.
PHASE ANGLE DETECTION SYSTEM, CONTROL DEVICE, AND PHASE ANGLE DETECTION METHOD
TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION (Japan)
Inventor
Kojima Makimura, Ayame
Ishimaru, Yusuke
Tobayashi, Shunsuke
Abstract
A phase angle detection system according to one aspect of the embodiment detects a phase angle of an electric motor in a drive system provided with a transmission unit that changes a rotation speed of the electric motor. The phase angle detection system includes a first sensor, a second sensor, and an arithmetic processing unit. The first sensor outputs a first signal for detecting at least a specific phase angle of a rotor of the electric motor. The second sensor outputs a second signal capable of detecting an amount of rotation of an output axis of the transmission unit. The arithmetic processing unit calculates, with an amount of deviation included in a result of the detection of a specific phase angle by the first signal defined for each rotational direction of the electric motor in advance, an estimated value of an absolute angle of the rotor of the electric motor using the amount of deviation of the first signal determined by a rotational direction of the electric motor, a result of the detection of the first signal, and the second signal.
A storage battery system (10) comprises: a plurality of storage battery boards (13-1 to 13-N); and a control device (12) that controls the plurality of storage battery boards (13-1 to 13-N). The storage battery board (13-i) is provided with a switch (SW) for controlling the connection between the storage battery board (13-i) and an uninterruptible power supply device (1). The control device (12) controls the switches (SW) of the plurality of storage battery boards (13-1 to 13-N) on the basis of the size of a load (6) connected to the uninterruptible power supply device (1) during a power failure in which the power supply from an AC input power supply (2) to the uninterruptible power supply device (1) is cut off.
H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over
An AC input filter (2) includes a first reactor (12RA) having a first terminal connected to a second terminal of a switch (1) and a second reactor (12RB) having a first terminal connected to the second terminal of the switch (1). A converter (3) includes a first multilevel circuit (3A) connected between a second terminal of the first reactor (12RA) and first to third DC lines (L1 to L3) and a second multilevel circuit (3B) connected between a second terminal of the second reactor (12RB) and the first to third DC lines (L1 to L3). A control device calculates a first voltage, which is the sum of the voltages across the terminals of first and second capacitors (C1, C2), and a second voltage, which is the difference between the voltages across the terminals of the first and second capacitors (C1, C2). When an AC power supply is healthy, the control device controls the first and second multilevel circuits (3A, 3B) so that the first voltage goes to a reference voltage and the second voltage is eliminated. In the event of a power failure in the AC power supply, the control device controls the first and second multilevel circuits (3A, 3B) so that the second voltage is eliminated.
H02M 7/12 - Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
This power conditioner performs coordinate conversion of a voltage detection value indicating the detection value of the output voltage of an inverter into a d-axis voltage detection value and a q-axis voltage detection value. The power conditioner performs coordinate conversion of a current detection value indicating the detection value of the output current of the inverter into a d-axis current detection value and a q-axis current detection value. Furthermore, the power conditioner calculates, on the basis of a d-axis difference voltage that is the difference between the d-axis voltage detection value and a d-axis voltage command value, a first current command value so that the d-axis voltage detection value approaches the d-axis voltage command value. Furthermore, the power conditioner calculates, on the basis of a q-axis difference voltage that is the difference between the q-axis voltage detection value and a q-axis voltage command value, a second current command value so that the q-axis voltage detection value approaches the q-axis voltage command value. Furthermore, the power conditioner controls the voltage of the inverter so that the d-axis current detection value approaches the second current command value and the q-axis current detection value approaches the first current command value.
H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION (Japan)
Inventor
Hayashi, Yasuhiro
Abstract
A paper winder includes a first winding core that is provided in a first arm turning centering on a rotating shaft and on which the paper should be wound, a first motor that drives the first winding core, a second winding core that is provided in a second arm turning centering on the rotating shaft and on which the paper should be wound next to the first winding core, and a controller that performs rotation control for the first motor and a second motor. In the rotation control, after, according to the turning of the second arm, completion of the winding of the paper by the first winding core and after a position of the second winding core has reached a position where the paper should be wound, during an operation of a traverse cutter that cuts the paper near the second winding core, when a torque value of the second motor is equal to or larger than a torque reference value, the controller switches a control mode of the second motor from speed control to torque control and perform tension correction control for adjusting the torque value of the second motor such that tension of the paper falls within a target range.
B65H 19/22 - Changing the web roll in winding mechanisms or in connection with winding operations
B65H 19/26 - Cutting-off the web running to the wound web roll
B65H 23/198 - Registering, tensioning, smoothing, or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in winding mechanisms or in connection with winding operations motor-controlled
TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION (Japan)
Inventor
Shimizu, Ryo
Nojima, Akira
Shimizu, Nobuo
Abstract
Each of PLCs transmits block data relating to a field device group constituting an industrial plant, to a SCADA server device at a fixed period. The SCADA server device includes a communication driver configured to receive the block data, and a client management circuitry connected to a plurality of HMI client devices in one-to-one relationship and configured to perform WebSocket communication with each of the HMI client devices. Each of the HMI client devices executes a web browser displaying an HMI screen on which parts indicating states of the industrial plant are arranged, and updates states of the parts based on signal data received from the client management circuitry. Each of the HMI client devices includes a client installer for installing a SCADA web program loaded at startup of the web browser.
First and second bases are arranged to face each other. An inverter is mounted on either of the first and second bases. A converter is mounted on the first base. A chopper is mounted on the second base. At least some of fins thermally connected to the converter via the first base are thermally connected to the chopper via the second base.
H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over
H02M 1/10 - Arrangements incorporating converting means for enabling loads to be operated at will from different kinds of power supplies, e.g. from AC or DC
H02M 1/32 - Means for protecting converters other than by automatic disconnection
H02M 3/00 - Conversion of DC power input into DC power output
H02M 7/00 - Conversion of AC power input into DC power outputConversion of DC power input into AC power output
41.
OZONE GENERATION DEVICE AND OZONE GENERATION METHOD
The purpose of the present disclosure is to provide a structure of an ozone generation device that is capable of generating a relatively high concentration of ozone gas while suppressing a refrigerant amount of a refrigerant to a minimally needed amount. In an ozone generation device according to the present disclosure, raw material gas (G1) is supplied from the entire periphery of an electric discharge space (6) toward the center, and ozone gas (G2) obtained in the electric discharge space (6) is output from an electric discharge central space (S1) to the outside via a gas outflow port (12). A refrigerant flow path (4) provided in a low-voltage electrode (1) has a center-priority refrigerant flow path structure in which a refrigerant (C1) is made to flow in an electrode center region (D1) prior to in an electrode peripheral region (D2), by causing the refrigerant (C1) to flow from a refrigerant inlet (4a) toward a refrigerant outlet (4b).
Provided is a grid-connected power conversion system that comprises a plurality of power conversion devices that convert power supplied from a plurality of distributed power sources to alternating-current power that is compatible with a power grid. When stopping the operation of a principal circuit unit of the power conversion devices, a controller of the power conversion devices performs an operation that switches a plurality of switching elements of the principal circuit unit for a prescribed period of time and then stops the operation of the principal circuit unit to suppress output of current from the principal circuit unit and inflow of current to the principal circuit unit from the power grid. The present invention thereby provides a grid-connected power conversion system that can suppress the occurrence of circulating current between a plurality of power conversion devices by means of a simpler configuration.
H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
43.
STRIP WIDTH CONTROLLER FOR REVERSIBLE ROLLING MILL
Toshiba Mitsubishi-Electric Industrial Systems Corporation (Japan)
Inventor
Manabe, Tsubasa
Abstract
A strip width controller for a reversible rolling mill includes a rolling controller, a rolling position detector, a tracker, and a calculator. The rolling controller operates an edger so that a pair of edger rolls comes into contact with a strip to be rolled during reverse pass rolling. The rolling position detector detects a rolling position of the edger when the pair of edger rolls are in contact with the strip to be rolled during the reverse pass rolling. The tracker tracks a longitudinal position of the strip to be rolled during the reverse pass rolling. The calculator calculates strip width result values at a plurality of positions in the longitudinal direction of the strip to be rolled based on an output of the rolling position detector and an output of the tracker.
This power conditioner includes an inverter that converts DC power into AC power and supplies the AC power to a power system, and a control device that controls the inverter. The control device estimates the system voltage on the basis of the output current of the inverter and the characteristics of the impedance between the inverter and the power system. Moreover, the control device generates a correction voltage on the basis of a voltage obtained by removing the high-frequency component from a differential voltage which is the difference between the estimated system voltage and a target voltage. Furthermore, the control device issues an instruction to the inverter on the basis of the voltage obtained by adding the correction voltage to the target voltage.
H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
A SCADA system according to one embodiment of the present disclosure comprises: a plurality of clients that can be connected to each of a plurality of SCADA servers; and an engineering tool that generates a static priority list specifying the static priority of connection with each SCADA server for at least one of the plurality of clients. Each client is connected to a SCADA server to which all of a plurality of programmable logic controllers are connected. For the clients whose static priority is specified in the static priority list, the SCADA server of the connection destination is determined in accordance with the static priority specified in the list. For the clients whose static priority is not specified in the static priority list, the SCADA server of the connection destination is determined such that loads are equalized among the SCADA servers to which all the programmable logic controllers are connected.
This abnormality determination device (500) is for a power conversion device (600) having an inverter (16) and an LC filter (22) disposed downstream of the inverter (16) and comprises: a simulation calculation circuit (300) that simulates ideal characteristics of a reactor (L2) and a capacitor (C2) of the LC filter (22); and an abnormality detection circuit (400) that detects an abnormality in the power conversion device (600) on the basis of the calculation result of the simulation calculation circuit (300), the magnitude of the current output from the inverter (16), and the magnitude of the voltage across the capacitor (C2).
H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
A power conversion device control device comprising: an effective power calculation section that acquires an electric current value and a voltage value measured on an AC side of a power conversion device, and calculates an effective power value, which is a measurement value for the effective power output by the power conversion device, on the basis of the acquired electric current value and voltage value; an integration unit that acquires the effective power value from the effective power value calculation section and, only when the acquired effective power value is in a charging direction, integrates the effective power value to calculate a charging power; a gain unit that calculates a first control value obtained by multiplying the charging power integrated by the integration unit and a prescribed gain; a DC voltage determination section that acquires the first control value calculated by the gain unit, calculates a DC voltage value from the charging power on the basis of the acquired first control value, and determines whether the calculated DC voltage value is at or above a prescribed threshold value; and an addition unit that, when it is determined by the DC voltage determination section that the DC voltage value is at or above the prescribed threshold value, adds together a prescribed effective power command value and the first control value and implements P droop control.
H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION (Japan)
Inventor
Katsukura, Tomoya
Tawada, Yoshihiro
Fukasawa, Issei
Kinoshita, Masahiro
Abstract
A control device includes a modulation rate calculator configured to calculate a modulation rate based on a DC voltage on a DC side an, a limiter configured to update a DC voltage command lower bound limiter based on the lower bound limiter operation value; a maximum power point tracking controller configured to calculate a first DC voltage command value and determine a second DC voltage command value based on the calculated first DC voltage command value and the DC voltage command lower bound limiter set to the limiter, and an inverter controller configured to control an inverter of the power conversion system based on the second DC voltage command value.
G05F 1/67 - Regulating electric power to the maximum power available from a generator, e.g. from solar cell
H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
H02M 7/5395 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency by pulse-width modulation
49.
CONTROL CIRCUIT FOR ROTARY RECTIFIER AND BRUSHLESS SELF-STARTING SYNCHRONOUS MOTOR
A control circuit for a rotary rectifier according to an embodiment of the present invention detects the instantaneous voltage of a field coil, computes the frequency from the instantaneous voltage, and causes a current to be supplied from the rotary rectifier to the field coil within a prescribed phase range that includes a zero-crossing point where the instantaneous voltage changes from positive to negative. Thus, the control circuit is highly versatile with a simple configuration, and can carry out phase-optimized excitation control in a reliable manner.
A power conversion device includes an inverter, a control circuit and a series body. The control circuit includes a modulation factor computing unit that computes a modulation factor of the inverter based on the DC voltage and an output voltage command value, a gate signal generator that generates a gate signal necessary for on/off drive of the switching elements for generation of a pulse train based on comparison between the computed modulation factor and a carrier signal, and a gate signal allocator circuit that adjusts allocation of a gate signal such that a voltage of the positive electrode side capacitor and a voltage of the negative electrode side capacitor are balanced.
H02M 7/483 - Converters with outputs that each can have more than two voltage levels
H02M 7/5395 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency by pulse-width modulation
An uninterruptible power supply apparatus includes an AC/DC converter that converts AC power supplied from a commercial AC power supply into DC power and supplies the DC power to a DC line, a DC/AC converter that converts the DC power received from the DC line into AC power and supplies the AC power to a load, a DC/DC converter that provides and receives DC power between the DC line and a battery, and a bidirectional converter that, in high-speed charging of the battery, operates in cooperation with the AC/DC converter, converts the AC power supplied from the commercial AC power supply into DC power, and supplies the DC power to the DC line. This can prevent a shortage of DC power during a high-speed charging operation and enables high-speed charging of the battery while supplying rated power to the load.
H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over
H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
H02J 7/02 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters
H02M 1/12 - Arrangements for reducing harmonics from AC input or output
H02M 1/14 - Arrangements for reducing ripples from DC input or output
H02M 1/44 - Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
H02M 7/219 - Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
H02M 7/521 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only in a bridge configuration
A web-based HMI subsystem according to one embodiment of the present disclosure checks whether or not program update numbers match between a SCADA web program that is running on a web browser of a client and a SCADA web program that is installed on a SCADA server. If a discrepancy between the program update numbers is detected, a client installer is downloaded from the SCADA server, and the web browser is terminated. The downloaded client installer is executed, and an updated client program and the updated SCADA web program are installed on the client. In conjunction with the execution of the client installer, the web browser is restarted.
The inside and the outside of an inverter unit of a power conversion device according to the present embodiment are partitioned by a partition plate. The partition plate is provided with a round hole, and a cylindrical capacitor case is threaded through the round hole. A gap between the edge of the round hole in the partition plate and the capacitor case threaded through the round hole is filled by a gasket. The gasket is formed from a base and a membrane. The base and the membrane are of a single piece. The base has a circular shape and the edges thereof are pinched from the front and back when mounted in the round hole. The membrane extends from the base mounted in the round hole toward the center of the round hole and adheres to the circumferential surface of the capacitor case threaded through the round hole.
H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
A plurality of power conversion devices convert direct current power to load based on direct current power stored in a plurality of power storage devices. The plurality of power conversion devices convert power of the load into direct current power corresponding to the plurality of power storage devices. The plurality of power conversion devices charge the plurality of power storage devices based on the power of the load side. The control device includes a conversion device determination part determining the power conversion devices among the plurality of power conversion devices to which an operation command is to be transmitted. The conversion device determination part is configured to determine, based on the information related to the states of the plurality of power storage devices and the plurality of power conversion devices, a number of the power conversion devices to which the operation command is to be transmitted.
In the present invention, during rolling, a first actual results collection unit collects first exit-side sheet thickness measured values at a first management point of a rolling material, and rolling load measured values for each stand. During the rolling of the rolling material, a second actual results collection unit collects second exit-side temperature measured values at a second management point, which is farther toward the tail end side than the first management point. After the rolling of the rolling material, a first training unit trains a deformation resistance model, a rolling load model, and a mill elongation model on the basis of the first exit-side sheet thickness measured values and the rolling load measured values. After the rolling of the rolling material, a second training unit trains a temperature model on the basis of the second exit-side temperature measured values. Before rolling of the next material, a setting calculation unit calculates a roll gap setting value, a roll peripheral speed setting value, and a cooling water amount setting value, using the deformation resistance model, the rolling load model, and the mill elongation model that were trained by the first training unit, and the temperature model that was trained by the second training unit.
B21B 37/00 - Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
B21B 37/26 - Automatic variation of thickness according to a predetermined programme for obtaining one strip having successive lengths of different constant thickness
B21B 37/74 - Temperature control, e.g. by cooling or heating the rolls or the product
A first controller includes a first processor and a first memory. A second controller includes a second processor and a second memory. In transmitting data from the first controller to the second controller, the first controller repeatedly performs a write operation of writing transmitted data into the first memory in accordance with a clock signal, and reads the transmitted data from the first memory and outputs the transmitted data. The second controller writes the received data into the second memory in accordance with the clock signal, and reads the received data from the second memory in accordance with the clock signal. When a plurality of data values of the received data read from the second memory match each other in a plurality of consecutive clock cycles including a current clock cycle, the second controller transmits the data value of the current clock cycle to the second processor.
H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over
G06F 1/26 - Power supply means, e.g. regulation thereof
H02M 5/42 - Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC by static converters
A charging/discharging management system includes a plurality of output parts used to connect with EVs, and a charger connected to a power supply. The charger is configured to charge the EVs connected to the plurality of output parts based on power supplied from the power supply. The charger includes a power supply part configured to convert the power supplied from the power supply into direct current power corresponding to the EVs, a switching part connected with the power supply part and connected with each of the plurality of output parts, and a controller connected with the power supply part and the switching part. The switching part is configured to switch paths between the power supply part and the plurality of output parts. The switching part is configured to supply direct current power output from the power supply part to one of the plurality of output parts.
B60L 53/67 - Controlling two or more charging stations
B60L 53/10 - Methods of charging batteries, specially adapted for electric vehiclesCharging stations or on-board charging equipment thereforExchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
B60L 53/62 - Monitoring or controlling charging stations in response to charging parameters, e.g. current, voltage or electrical charge
A design assistance method includes: acquiring design candidate data including design parameters as electric motor design candidates, and acquiring a first evaluation value of each piece of design candidate data; selecting top at least one piece of design candidate data having the first evaluation value relatively high as first design candidate data, and generating second design candidate data including the design parameters from the first design candidate data; calculating a second evaluation value of the first design candidate data from the design parameters included in the first design candidate data, and calculating the second evaluation value of the second design candidate data from the design parameters included in the second design candidate data; and selecting design candidate data to be used as design data of the electric motor from among the first design candidate data and the second design candidate data from the second evaluation value.
This SCADA web HMI system comprises an address diversion source designation means and an address diversion means. The address diversion source designation means designates an existing component on a first screen as an address diversion source for a new component on a second screen, which is an address diversion destination. The address diversion means is used for causing the new component and the existing component to perform the same processing when the existing component is designated as the address diversion source for the new component by the address diversion source designation means. When an address assignment means has already assigned an address to the existing component, the address diversion means diverts the address of the existing component to the new component. A web browser displays an HMI screen, updates the display of the existing component on the first screen and the new component on the second screen according to a common display signal, and transmits operation signals corresponding to operations of the existing component and the new component to a common address of a PLC.
G06F 8/38 - Creation or generation of source code for implementing user interfaces
G05B 19/05 - Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
G06F 9/06 - Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
An electromagnetic wave detection device is one to detect an electromagnetic wave from an electromagnetic wave generation source in a second space partitioned by a partition plate to attenuate propagation of the electromagnetic wave from a first space in which the electromagnetic wave generation source is disposed, the electromagnetic wave detection device including an electromagnetic wave observation unit including: a metal wire having a penetrating portion to penetrate a through hole formed in the partition plate while being separated from a peripheral wall of the through hole; a protruding portion to protrude from the penetrating portion to the first space and receive the electromagnetic wave from the electromagnetic wave generation source; and an extending portion extending from the penetrating portion to the second space, in which one end portion located on the second space side is connected to a ground point located on the second space side.
This finishing-rolling mill roll balancing device is provided with a roll-balancing adjuster that before the leading end of rolled material wraps onto the coiler, adjusts respective rolling devices on the working end and driving end of the final mill stand to reduce asymmetrical flatness defects measured by a flatness gauge and eccentricity measured by an eccentricity gauge, and that after the leading end has wrapped onto the coiler, adjusts the rolling devices on the working end and driving end of the final mill stand to reduce wedges measured by a sheet-profile gauge.
B21B 1/26 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for rolling bands or sheets of indefinite length in a continuous process by hot-rolling
09 - Scientific and electric apparatus and instruments
42 - Scientific, technological and industrial services, research and design
Goods & Services
Radio control devices for remote monitoring and control of the functions and status of other electrical, electronic and mechanical devices and systems; equipment for measuring and monitoring energy consumption in controlled energy installations; computer software for managing or monitoring the energy consumption charges of monitored electricity installations; computer programs for remote monitoring, control and measurement; computer software Remote monitoring, remote control and remote telemetry of computer systems for the management and monitoring of energy consumption, and the providing information and advice relating thereto; design, creating or maintenance of computer programs; rental of computer hardware; providing computer programs; visualization of energy usage through cloud computing; server hosting; hosting of internet platforms; data processing using computer hardware; energy efficiency diagnosis; energy efficiency consultancy; measurement, evaluation and analysis of energy consumption; technical advice in the field of energy conservation and energy efficiency
63.
VEHICLE TESTING APPARATUS AND METHOD OF CONTROLLING OPERATION OF VEHICLE TESTING APPARATUS
A displacement sensor according to the disclosure detects a tire turning angle of a tire, using a distance measurement region in the tire as a detection target to obtain angle measurement information. A controller receives the angle measurement information from the displacement sensor, determines a steering angle corresponding to the tire turning angle indicated by the angle measurement information, and outputs steering angle instruction information indicating the determined steering angle to a motor drive. The motor drive drives a rotation motor of a roller rotation mechanism according to the steering angle instruction information.
TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION (Japan)
Inventor
Shimizu, Ryo
Nojima, Akira
Shimizu, Nobuo
Abstract
There is provided an HMI screen creation device that enables creation of an HMI screen in which a plurality of operation elements are exclusively arrangeable with high flexibility, without deteriorating quality of the HMI screen. An HMI screen designing device according to the present disclosure includes: a drafting processing unit including a stencil area where a plurality of operation elements to be arranged in the HMI screen are arranged to be selectable, and a drafting area where a drawing is drawn by arranging the operation elements selected in the stencil area; and a drawing data generation processing unit configured to generate drawing data as data of the drawing in which the plurality of operation elements are arranged. The drafting processing unit includes exclusive grouping means for mutually exclusively grouping the plurality of operation elements arranged on the drawing.
G05B 19/4155 - Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by programme execution, i.e. part programme or machine function execution, e.g. selection of a programme
65.
UNINTERRUPTIBLE POWER SUPPLY SYSTEM AND UNINTERRUPTIBLE POWER SUPPLY DEVICE
An uninterruptible power supply device (U) is provided with at least one power converter (1, 4, 5), a plurality of processors (7-12), a memory (15), and a memory access controller (13). The first processor (7) controls the at least one power converter (1, 4, 5) on the basis of information read from the memory (15), and writes control information in the memory (15). The second processor (8) measures a current and voltage input/output to/from at least one power converter (1, 3, 5), and writes measurement information in the memory (15). The third processor (9) exchanges information with other uninterruptible power supply devices and external devices, and writes reception information in the memory (15). The plurality of fourth processors (10) respectively generate a plurality of sets of trace data from the information stored in the memory (15). Trace conditions for generating corresponding trace data are set in advance in each of the plurality of fourth processors (10). Each of the plurality of fourth processors (10) stores the trace data generated according to the corresponding trace conditions in an external storage device.
H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over
A daisy-chain communication line of a power conversion system connects a master station for controlling a plurality of slave stations each including a power converter to the plurality of slave stations. The plurality of slave stations is configured to supply electric power to a load device from the power converter of each slave station. Each of the plurality of slave stations switches between “operation” for supplying electric power from the power converter and “suspension” for suspending supply of electric power and supplies electric power to the load device. The daisy-chain communication line includes a group of a first communication line for sending the control signal α and a second communication line for sending the operation permission signal β.
H02M 5/45 - Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC by static converters using discharge tubes or semiconductor devices to convert the intermediate DC into AC using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
A base member includes a bottom plate and a side plate. A plurality of first capacitors are aligned in a second direction on the bottom plate. The side plate is arranged upright in the first direction on the bottom plate. A pair of fin portions of each of fixation members are mounted on the side plate to fix the first capacitors to the base member. On the side plate, the fixation members on odd rows in the alignment direction are equal in position in the first direction. The fixation members on even rows in the alignment direction are equal in position in the first direction and differ in position in the first direction from the fixation members on the odd rows. The fin portions of two fixation members, adjacent to each other in the second direction, are aligned in the first direction.
The art of the present disclosure is applied to a control system for a continuous rolling machine comprising a rolling stand. The control system according to the present disclosure comprises a storage device for holding training data calculated on the basis of time-series data acquired during rolling. The control system calculates a set value of the roller speed of the rolling stand on the basis of the training data, acquires a correction command value performed on the set value while the steel sheet is passing through the continuous rolling mill, and updates the training data on the basis of the acquired correction command value.
A power conditioning system having a controller which includes voltage recognition circuitry that recognizes a voltage value of a voltage to be generated by a circuit component, a voltage calculation circuitry that calculates a voltage calculation value on the basis of the voltage value recognized by the voltage recognition circuitry, failure determination circuitry that compares the voltage calculation value calculated by the voltage calculation circuitry with a predetermined threshold and determines that a failure occurs in an AC capacitor in a case where the voltage calculation value is smaller than the predetermined threshold, and operation control circuitry that stops a power conditioner in a case where the failure determination circuitry determines that a failure occurs in the AC capacitor during operation of the power conditioner.
A frequency stabilization system according to an aspect includes: a power conversion unit configured to convert DC power into AC power and output the AC power to a power grid, the DC power being output by at least any of a photovoltaic panel and a storage battery; a bidirectional DC converter that is connected to the storage battery in series, the bidirectional DC converter being configured to control charging and discharging of the storage battery for the power conversion unit based on an active-power command value; a grid frequency detection unit configured to detect a grid frequency of AC power to be output to the power grid by the power conversion unit; a necessary-power calculation section configured to calculate power necessary for the power grid based on the detected grid frequency; a command value calculation section configured to calculate an active-power command value for the bidirectional DC converter based on the calculated necessary power; and an output control section configured to control a charging or discharging output of the storage battery to the power conversion unit by the bidirectional DC converter based on the calculated active-power command value.
TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION (Japan)
Inventor
Hiramatsu, Takahiro
Orita, Hiroyuki
Abstract
An ultrasonic atomization apparatus according to the present disclosure includes a non-contact mist supply pipe that is provided above an atomization container without being in contact with the atomization container including a mist output pipe. A pipe overlapping space is formed between a connection pipe portion of the non-contact mist supply pipe and an upper region of the mist output pipe. A leakproof gas supply pipe is provided in the pipe overlapping space without being in contact with the mist output pipe and the non-contact mist supply pipe. The leakproof gas supply pipe outputs a mist leakproof gas from a gas output port provided in the top thereof.
B05B 17/06 - Apparatus for spraying or atomising liquids or other fluent materials, not covered by any other group of this subclass operating with special methods using ultrasonic vibrations
B05B 12/00 - Arrangements for controlling deliveryArrangements for controlling the spray area
A preventive maintenance system according to an embodiment of the present invention comprises: an induction heating device having an inductor including a coil that heats a material to be heated by electromagnetic induction of a high-frequency current from an inverter; a voltage detector that detects and outputs a voltage of the coil; a current detector that detects and outputs a current of the coil; and a control device that calculates an impedance of a circuit including the coil on the basis of the detected voltage and current. The control device calculates the impedance on the basis of the voltage and current detected before the material to be heated reaches the coil or after the material to be heated is discharged from the coil, and stores the calculated impedance in association with each time when the voltage and the current used to calculate the impedance are detected.
A plurality of semiconductor modules (M) are arranged on the first surface of a substrate (30) so as to be aligned along a first direction orthogonal to the vertical direction of this power conversion device. Each capacitor (40) has a cylindrical portion (44) and electrode terminals (42P, 42N) disposed at a first end portion in the extending direction of the cylindrical portion (44). At least one first capacitor (40_1) is disposed on the second surface side of the substrate (30) such that the extending direction of the cylindrical part (44) is a second direction orthogonal to the vertical direction and the first direction. At least one second capacitor (40_2) is disposed on the second surface side of the substrate (30) such that the extending direction of the cylindrical part (44) is the second direction and the electrode terminals (42P, 42N) are positioned opposite the electrode terminals (42P, 42N) of the at least one first capacitor (40_1) in the second direction. In a plan view seen from the first direction, the at least one first capacitor (40_1) and the at least one second capacitor (40_2) are disposed such that parts of the respective cylindrical portions (44) overlap with each other in the vertical direction and the second direction.
H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
H02M 7/12 - Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
An electrolytic cell power supply device is provided, the electrolytic cell power supply device includes: a first converter configured to convert alternating current power supplied from a power system into direct current power; a storage element configured to store direct current power output from the first converter; a second converter configured to convert the direct current power stored in the storage element into other direct current power corresponding to the electrolytic cell, and supply the direct current power after the conversion between the anode and the cathode of the electrolytic cell; and a control device configured to control operations of the first and second converters, the control device includes a corrosion prevention operation mode In a power interruption of the power system, the corrosion prevention operation mode controlling the operation of the second converter to suppress a generation of a reverse current by supplying, to the electrolytic cell, a direct current power. Accordingly, an electrolytic cell power supply device that can suppress the generation of a reverse current with a simpler configuration is provided.
The purpose of the present disclosure is to provide a structure for an active gas generation device capable of supplying high-purity active gas without complicating the manufacturing process. In the present invention, an electrode unit (81) includes a dielectric protection film (FC2) that takes, from between dielectric films (F2) and (F3), the dielectric film (F2) as the dielectric film to be protected, and that is closely adhered to the lower surface of the dielectric film F2. A discharge space (4) is provided in a dielectric space (18) which is a space in which the dielectric protection film (FC2) and the dielectric film (F3) face each other, the discharge space including a region in which a high-voltage electrode (F5) and a ground electrode (F6) overlap in plan view. The constituent material of the dielectric protection film (FC2) has the protective characteristics of blocking the irradiation of ions generated by the dielectric barrier discharge to the dielectric film (F2) when the dielectric barrier discharge occurs in the discharge space (4), and not chemically reacting with the ions.
TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION (Japan)
Inventor
Kitagoh, Kazutoshi
Abstract
A hot rolling line includes a rougher mill, a finisher mill, an intermediate equipment group, a rougher delivery-side pyrometer, a finisher entry-side pyrometer, and a control device. The intermediate equipment group includes a cooling equipment. The control device includes a set-up calculation device configured to determine a flow amount set-up value of the coolant water in the cooling equipment, a feedforward control device configured to perform feedforward control of a flow amount of the coolant water in the cooling equipment based on the flow amount set-up value, and a learning device configured to calculate a learning value based on a flow amount measured value of the coolant water in the cooling equipment and a finisher entry-side temperature measured value indicating a measured value of the material to be rolled measured by the finisher entry-side pyrometer.
TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION (Japan)
Inventor
Shiraishi Hajime
Abstract
This drive device drives a load by means of an electric motor. The drive device comprises an inverter, a controller, and a status identification unit. The inverter drives the electric motor. The controller controls the inverter on the basis of a command value, and outputs information indicating the operation status of the electric motor due to the control. The status identification unit detects an abnormality in the electric motor and a machine portion of the load of the electric motor on the basis of a machine learning model learned in advance by learning processing in which information on the vibration of the electric motor is included in learning data, the information on the vibration of the electric motor, and the operation status.
This control device for a multi-level power conversion system is a control device in a multi-level power conversion system having a multi-level power converter and a control device and using a carrier level shift modulation method, said multi-level power converter having a plurality of semiconductor switching elements and a plurality of neutral point elements. The control device performs: a process for generating a modulation wave on the basis of a voltage command value of each phase; a process for generating a carrier wave that is a triangular wave signal having a predetermined carrier period; a process for generating an injection carrier that is a signal that varies in a predetermined amplitude range and has the same carrier period as and an opposite phase to the carrier wave; a process for generating a modulated wave by performing a carrier injection control for superimposing the modulation wave and the injection carrier; and a process for generating a gate signal for controlling the operations of the plurality of semiconductor switching elements and the plurality of neutral point elements in the multi-level power converter, on the basis of the result of comparing the modulated wave obtained by the carrier injection control with a plurality of carrier waves.
A power supply device according to an embodiment is configured to supply DC power to an electrolytic cell producing hydrogen by electrolysis. The power supply device includes a power converter, a reactor, and a filter circuit; the power converter is self-commutated and includes a first output terminal and a second output terminal; the second output terminal is configured to output a positive voltage with respect to the first output terminal; the reactor is connected in series to at least one of the first output terminal or the second output terminal; and the filter circuit is connected between an anode and a cathode of the electrolytic cell. The filter circuit is a low-pass filter. A cutoff frequency of the filter circuit is set to be less than a switching frequency of the power converter.
H02M 1/14 - Arrangements for reducing ripples from DC input or output
H02M 3/155 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
H02M 7/04 - Conversion of AC power input into DC power output without possibility of reversal by static converters
The purpose of the present disclosure is to provide a configuration of a chassis dynamometer that has a more compact installation space. A roller (2) in a roller device (100) that is provided to a chassis dynamometer according to the present disclosure includes a motor (2) that is provided within a roller outer frame body (10). In the motor (2), a rotation shaft (21) is attached to the roller outer frame body (10) so as to be able to rotate in conjunction with a rotation operation of a motor rotor (71), and an oscillation shaft (21) is attached to a stator structure (72) and does not operate in conjunction with the rotation operation of the motor rotor (71). The rotation shaft (21) is supported by a bearing stand (11) for rotation, and the oscillation shaft (22) is supported by a bearing stand (12) for oscillation. A cooling fan (50) that supplies a cooling airflow (F2) to the motor (7) is provided to the outside of the roller (2).
This uninterruptible power supply system comprises: N uninterruptible power supply devices (U) connected in parallel between an AC power supply (1) and a load (2); a current detector for detecting a load current; and a control device. N is an integer that is 2 or more, and M is an integer that is 1 or more and less than N. The uninterruptible power supply devices (U) include a converter (14) and an inverter (18). The uninterruptible power supply devices (U) are configured to be capable of switching between: a first power supply mode in which DC power generated by the converter (14) is supplied to the inverter (18) and stored in a power storage device (B); and a second power supply mode in which the DC power of the power storage device (B) is supplied to the inverter (18). In a case where the AC power supply (1) is sound and the load current detected by the current detector is smaller than a threshold current, the control device sets M uninterruptible power supply devices (U) among the N uninterruptible power supply devices (U) to the second power supply mode and sets N−M uninterruptible power supply devices (U) to the first power supply mode.
H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over
At least one first power converter of a plurality of power converters has a charging mode and a standby mode, the charging mode being a mode of converting AC power supplied from an AC power supply through a switch into DC power and storing the DC power in a corresponding power storage device, the standby mode being a mode of generating a control signal for power conversion and awaiting the power conversion. When an AC voltage supplied from the AC power supply is normal, a controller turns on the switch and alternately switches the at least one first power converter between the charging mode and the standby mode. When the AC voltage is not normal, the controller turns off the switch and controls the plurality of power converters such that each of the plurality of power converters converts DC power of the power storage device into AC power and supplies the AC power to a load.
H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over
H02J 7/34 - Parallel operation in networks using both storage and other DC sources, e.g. providing buffering
H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
83.
THICKNESS CONTROLLING METHOD AND RIGIDITY MONITORING METHOD FOR ROLLING MILL
Toshiba Mitsubishi-Electric Industrial Systems Corporation (Japan)
Inventor
Shimotani, Toshihito
Abstract
The present disclosure provides a thickness controlling method for a rolling mill that makes it possible to calculate an appropriate rolling mill gap correction amount on the basis of a roll force change amount between a preceding material and a present material, and to thus improve the precision level for thicknesses. The thickness controlling method for the rolling mill includes a step of using a regression model to recursively approximate a relationship between the roll force change amount between the preceding material and the present material and a gap error change amount of the rolling mill, and predicting a gap error in a rolling of the present material on the basis of the regression model, the preceding material being a rolled coil rolled by the rolling mill immediately prior, and the present material being another rolled coil to be rolled following the preceding material, a step of correcting a gap setting amount in the rolling of the present material, on a basis of a value of the predicted gap error, and a step of updating a regression coefficient of the regression model, on a basis of an actual roll force and an actual gap error change amount obtained from the rolling of the present material.
This electric power conversion device (1) comprises: arms (A1-A3) that include a plurality of series-connected unit converters (5) and that are connected to an AC power supply (8); and a control device (7) that controls the arms. Each of the unit converters includes a capacitor (15). The control device includes an inspection unit (53) that is provided in correspondence with each of the unit converters and that inspects the corresponding capacitor. If the voltage (VPP) of an AC component (Vac) included in the voltage (VDC) across terminals of the corresponding capacitor is higher than a threshold voltage (Vt), the inspection unit determines that the corresponding capacitor needs to be replaced with a new one. Accordingly, it is possible to determine whether each of the plurality of capacitors needs to be replaced with a new one while operating the electric power conversion device.
In the present invention, at a transition time point at which a transition has occurred from rolling to an idling state, a rolling/idling prediction unit predicts the time it will take for a next material to be rolled to reach a roller. A cooling water quantity monitor unit acquires a quantity of cooling water being supplied to a nozzle at the transition time point. A roller thermal expansion prediction unit sets the time predicted by the rolling/idling prediction unit as a prediction period and predicts thermal expansion of the roller for the prediction period and at the transition time point. A cooling water quantity reduction computation unit, while coordinating with the roller thermal expansion prediction unit, computes a cooling water quantity which is to be reduced within the prediction period so that the difference between the thermal expansion at the transition time point and the thermal expansion for the prediction period is kept within a prescribed range. A variable flow rate valve adjustment unit adjusts the aperture of a variable flow rate valve so that the cooling water quantity is reduced only by the quantity computed by the cooling water quantity reduction computation unit.
B21B 28/02 - Maintaining rolls in effective condition, e.g. reconditioning
B21B 45/02 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
Provided is an EV charging/discharging system comprising: a plurality of charging/discharging stands that are detachably connected to an EV so as to perform charging and discharging of a power storage device mounted on the connected EV; a plurality of bidirectional converters that are provided to correspond to the plurality of charging/discharging stands and perform bidirectional power conversion in a direction in which a power storage device of an EV connected to a corresponding charging/discharging stand is charged and a direction in which the power storage device of the EV connected to the corresponding charging/discharging stand is discharged; and a control device for controlling the operation of the plurality of bidirectional converters. The control device controls the operation of the plurality of bidirectional converters such that the EV connected to each of the plurality of charging/discharging stands has a target charging rate at the end of parking. Accordingly, provided is an EV charging/discharging system with which it is possible to more effectively utilize an EV power storage device while further increasing the convenience of an EV user.
This power conversion system comprises a transformer, a first power conversion device, a second power conversion device, and a control unit. The transformer comprises a primary winding, a secondary winding, and a tertiary winding that are magnetically coupled to each other. The primary winding of the transformer is connected to a power supply PS via a circuit breaker. The first power conversion device includes a rectifier for rectifying and smoothing AC power received from the secondary winding, and a smoothing capacitive element. The first power conversion device uses the smoothed DC power to generate power to be supplied to a load. The second power conversion device generates third AC power by switching a semiconductor switching element. The second power conversion device supplies the third AC power to the tertiary winding at least during a period from when the circuit breaker is opened to when the circuit breaker is closed. The control unit controls the first power conversion device, the second power conversion device, and the circuit breaker.
H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
A pipe connection structure of an embodiment of the present invention mutually connects extending-direction ends of a first pipe and a second pipe. The first pipe and the second pipe each include a pipe body and a pair of coupling members. The pipe body has formed at an end thereof an inclined end surface which is inclined with respect to a plane orthogonal to the extending direction when viewed from a first radial direction of the pipe. The pair of coupling members are disposed on both sides in the first radial direction at the extending-direction end of the pipe, and each protrude outward in the first radial direction from an outer peripheral surface of the pipe body. In a state in which the inclined end surface of the first pipe and the inclined end surface of the second pipe are butted against each other, the pair of coupling members of the first pipe and the pair of coupling members of the second pipe are respectively fastened to each other with a fastening member.
A power converter (4) includes first and second switching elements (Q1, Q2) connected in series between first and second DC lines (L1, L2), third and fourth switching elements (Q3, Q4) connected in series between the second DC line (L2) and a third DC line (L3), an AC terminal (4a), and a multi-level circuit. The multi-level circuit is connected between: a first connection point (4b) of the first and second switching elements and a second connection point (4c) of the third and fourth switching elements; and the AC terminal (4a). The filter includes a reactor (18U) in which the first terminal is connected to the AC terminal (4a) and a capacitor (19U) connected between a second terminal of the reactor and the second DC line (L2). The multi-level circuit mutually converts: a first DC voltage received by the first connection point (4b) and a third DC voltage received by the second connection point (4c); and an AC voltage having at least five voltage values.
H02M 7/483 - Converters with outputs that each can have more than two voltage levels
H02M 7/12 - Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
A SCADA web HMI system draws an HMI screen including a first material-to-be-rolled part arranged in a first zone and an extendable/contractible second material-to-be-rolled part arranged in a second zone. The first and second material-to-be-rolled parts are drawn at each drawing cycle shorter than a reception cycle of PLC signals. At each drawing cycle after a first PLC signal is received, a first material-to-be-rolled part head-end position is calculated based on a conveyance speed included in the first PLC signal and an elapsed time. A drawing size of the first material-to-be-rolled part is set to a length from an entry side of the first zone to the first material-to-be-rolled part head-end position. When a second PLC signal is received, the first material-to-be-rolled part head-end position has not reached the second zone, the drawing size of the first material-to-be-rolled part is set to a zone length of the first zone.
An uninterruptible power supply device (100) comprises: a converter (4) that converts AC power supplied from an AC power supply (12) to DC power; an inverter (8) that converts the DC power to AC power and supplies the converted AC power to a load (14); a DC link (5) connected between the converter (4) and the inverter (8); and a bidirectional chopper (7) that performs DC voltage conversion between the DC link (5) and an energy storage device (13). The bidirectional chopper (7) executes a charging operation of storing DC power at the DC link (5) in the energy storage device (13) when the AC power supply (12) is healthy. When executing the charging operation in a situation where an end-of-charge voltage of the energy storage device (13) is higher than a DC link voltage of the DC link (5) and an end-of-discharge voltage of the energy storage device (13) is lower than the DC link voltage, the bidirectional chopper (7) switches between a first buck operation for bucking the DC link voltage and a first boost operation for boosting the DC link voltage, depending on the voltage of the energy storage device (13).
H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over
In the present invention, a movement distance calculation unit calculates the movement distance of a rolled stock from a rolling mill. A reel rotation angle calculation unit calculates a rotation angle of a reel installed on at least one of the entrance side and the exit side at the rolling mill. A plate thickness deviation calculation unit calculates a plate thickness deviation. A plate thickness deviation input determination unit determines the input timing of the plate thickness deviation on the basis of the movement distance of the rolled stock calculated by the movement distance calculation unit and the rotation angle of the reel calculated by the reel rotation angle calculation unit. A plate thickness deviation storage unit adds and stores the plate thickness deviation calculated by the plate thickness deviation calculation unit on the basis of the input timing determined by the plate thickness deviation input determination unit. A plate thickness deviation output determination unit determines the output timing of the plate thickness deviation on the basis of the rotation angle of the reel calculated by the reel rotation angle calculation unit. An operation amount calculation unit reads, on the basis of the output timing determined by the plate thickness deviation output determination unit, the integrated value of the plate thickness deviations stored in the plate thickness deviation storage unit and calculates an operation amount of a screw-down device in the rolling mill on the basis of the integrated value.
B21C 47/00 - Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
B21C 51/00 - Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses
A power conversion system (1) is provided with a transformer (2), a power converter (10), and a filter circuit (5). The transformer has a secondary winding (WS) and a plurality of primary windings (WPA-WPD) that are insulated from one another and magnetically coupled to one another, converts alternating current power supplied to the primary windings into multi-phase alternating current power, and supplies the multi-phase alternating current power from the secondary windings to a load. The power converter supplies alternating current power to each of the primary windings. The filter circuit is connected to the secondary winding and smooths the multi-phase alternating current power.
H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
H02M 1/12 - Arrangements for reducing harmonics from AC input or output
This power conversion system includes a transformer, N first inverters, N second inverters, and a control unit. The transformer has 2N-system primary windings for three-phase alternating current and a 1-system secondary winding for three-phase alternating current. The control unit controls each of the inverters by PWM control. A first primary winding corresponding to one of the N first inverters and a second primary winding corresponding to one of the N second inverters are determined on the basis of the magnitude of respective percent impedances from the respective primary windings to the secondary winding. A first carrier phase in PWM control with respect to the first inverter and a second carrier phase in PWM control with respect to the second inverter are inverted. Said N is a natural number of 2 or more.
H02M 7/493 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode the static converters being arranged for operation in parallel
H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
A DC power converter includes a chopper circuit. In a step-up mode, in the chopper circuit, a current path that starts from the DC power supply and returns to the DC power supply through the first reactor, the first connection point, the second switch, the third connection point, the second capacitor, and the fourth connection point in order is formed when the first switch is off and the second switch is on, and a current path that starts from DC power supply and returns to the DC power supply through the first reactor, the first connection point, the first diode, the second connection point, the first capacitor, the third connection point, the second capacitor, and the fourth connection point in order is formed when the first switch is off and the second switch is off.
H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
H02M 1/088 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
96.
EV CHARGING APPARATUS AND METHOD FOR OPERATING THE SAME
An EV charging apparatus includes: a plurality of charging stations respectively connected detachably with EVs, the plurality of charging stations being configured to charge power storage devices mounted in the EVs when connected; a plurality of power supply circuits configured to convert power supplied from a power system side into direct current power compatible with the EVs, and to supply the direct current power after the conversion respectively to the plurality of charging stations; a charging/discharging station connected detachably with the EV, the charging/discharging station being configured to charge and discharge the power storage device mounted in the EV when connected; and a bidirectional converter configured to perform power conversion in two directions, the two directions being a direction of charging the power storage device of the EV connected to the charging/discharging station, and a direction of discharging the power storage device of the EV connected to the charging/discharging station.
A power conversion device having an addition value calculation circuit which obtains addition values of maximum phases and minimum phases of first output voltage command signals, an effective value calculation circuit which obtains an effective value of an output voltage command based on the first output voltage command signals, coefficient determination means for determining a coefficient which minimizes power loss of the three-phase voltage inverter based on the effective value, a value of the DC voltage, and an output power factor command, a control amount calculation circuit which obtains control amounts by multiplying the addition values, an output voltage command signal control circuit which obtains second output voltage command signals as signals resulting from subtraction of the control amounts respectively from the three phases of the first output voltage command signals, and a PWM control circuit which generates gate signals based on the second output voltage command signals.
H02M 1/14 - Arrangements for reducing ripples from DC input or output
H02M 1/44 - Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
H02M 7/5387 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
H02M 7/5395 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency by pulse-width modulation
98.
SUBSTRATE SURFACE TREATMENT DEVICE AND SUBSTRATE SURFACE TREATMENT METHOD
Provided is a surface treatment device capable of performing surface treatment on a treatment surface of a substrate at low cost by reusing a mist of a treatment liquid introduced into a treatment chamber. The surface treatment device is a device for surface treatment of a substrate by causing a treatment liquid to adhere to the treatment surface of the substrate. The surface treatment device includes a mist generator that generates a mist of the treatment liquid; a treatment chamber that introduces the mist generated by the mist generator and causes the introduced mist to adhere to the treatment surface of the substrate; and a circulation path that circulates the mist discharged from the treatment chamber to the treatment chamber together with the mist generated by the mist generator.
TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION (Japan)
Inventor
Hiramatsu, Takahiro
Orita, Hiroyuki
Abstract
An ultrasonic atomization apparatus according to the present disclosure includes a non-contact mist supply pipe that is provided above an atomization container without being in contact with the atomization container including a mist output pipe and a leakproof tank that is connected to the mist output pipe without being in contact with the non-contact mist supply pipe. The leakproof tank contains a sealing proper liquid. In this case, the sealing proper liquid is contained in a liquid containing space formed between the leakproof tank and the mist output pipe.
B05B 17/06 - Apparatus for spraying or atomising liquids or other fluent materials, not covered by any other group of this subclass operating with special methods using ultrasonic vibrations
B05B 12/08 - Arrangements for controlling deliveryArrangements for controlling the spray area responsive to condition of liquid or other fluent material discharged, of ambient medium or of target
TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION (Japan)
Inventor
Takagi, Sanga
Shimotani, Toshihito
Abstract
A target value and a detailed prediction value of the first control index (T1CTref, T1CTprd) are used to calculate an FF water injection amount. Target values of first and second control indexes (T1CTref, T2CTref) and measured values of first and second control indexes (T1CTact, T2CTact) are used to calculate an FB water injection amount. Coolant injection amounts in an FF bank group (B1 to Bj) is controlled based on respective positions of segments constituting the steel plate, an initial water injection amount, and the FF water injection amount. Coolant injection amounts in an FB bank group (Bj+1 to BN) is controlled based on the respective positions of the segments, the initial water injection amount, and the FB water injection amount.
