Abstract

An equipment maintenance system determines a support method to support equipment failures comprising: an asset knowledge database registers equipment failures and their causes, an input section receives fault information output from the equipment, a cause of failure presumption section refers to the asset knowledge database and presumes the causes of failure based on information received by the input section, a support method determination section determines the method to support the presumed cause of failure, a cost estimating section estimates the cost required for the determined support method determination section dividing into the cost of on-site support, in which technicians visit the site where the equipment is installed, and the cost of remote support, in which technicians support the equipment remotely, and an output section outputs the support method with the lowest cost among the cost of on-site support and the cost of remote support estimated by the cost estimating section.

IPC Classes  ?

• G06Q 30/0283 - Price estimation or determination
• G06Q 10/20 - Administration of product repair or maintenance

Abstract

The conduction reliability of a fitting connection portion between a recess and a protrusion of a stator coil of a rotary electrical machine is improved. The stator coil is formed by a first coil segment 30 including a protrusion 35 at one end and a second coil segment 40 including a recess 46 at one end. A projection side surface 35b of the protrusion 35 is a metal surface of the first coil segment 30, and a metal plating layer 50 having a lower hardness than a metal of the first coil segment 30 is formed on a metal surface of an inner wall surface 46b of the recess 46. When the coil segments 30 and 40 are joined together, the metal surface of the projection side surface 35b comes into contact with the metal plating layer 50, and therefore, gaps between both projections 38a and grooves 38b and the metal plating layer 50 are closed, and the contact resistance is reduced.

IPC Classes  ?

• H02K 3/28 - Layout of windings or of connections between windings

Abstract

This diagnosis system diagnoses a monitoring target instrument by using a computer comprising a processor and a memory. The processor: receives operation data that contains the control which has been performed periodically over the monitoring target instrument, and the running time of the instrument which has been run according to said control; and gives a diagnosis of abnormality with respect to the instrument in an inefficient operation state, on the basis of a determination as to whether or not a prescribed relationship is satisfied between the control and the running time of the instrument contained in the operation data.

IPC Classes  ?

• G01M 3/02 - Investigating fluid tightness of structures by using fluid or vacuum
• G01M 99/00 - Subject matter not provided for in other groups of this subclass
• G01N 15/08 - Investigating permeability, pore volume, or surface area of porous materials

Abstract

To provide a technique that enables recovery of oil stored in a gear casing without using a pump. A compressor 100 includes: a rotor 9 that compresses air; an electric motor 42 that drives the rotor 9; a gear that transmits the drive of the electric motor 42 to the rotor 9; a gear casing 22 that houses the gear; an oil tank 11 that stores oil separated from the compressed air; an oil supply passage 25 that extends from the oil tank 11 to the gear casing 22; an oil recovery passage 26 that extends from the gear casing 22 to a compressor intake portion 20; and an oil pressurizing passage 27 that extends from a discharge port 14b to the gear casing 22. Oil is supplied from the oil tank 11 to the gear casing 22 via the oil supply passage 25 by discharge pressure of the compressor 100, and the gear casing 22 is pressurized via the oil pressurizing passage 27 by the discharge pressure, thereby recovering oil from the gear casing 22 to the compressor intake portion 20 via the oil recovery passage 26.

IPC Classes  ?

• F04C 29/02 - LubricationLubricant separation
• F04C 18/08 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing

Abstract

The present invention comprises: a diagnostic condition determination unit that determines a predetermined diagnostic condition on the basis of a diagnostic frequency, motor speed, and output voltage modulation rate for performing abnormality diagnosis; a control change unit that reduces the modulation rate on the basis of the determination result of the diagnostic condition determination unit; and an abnormality diagnosis unit that performs equipment abnormality diagnosis from a motor current on the basis of the determination result of the diagnostic condition determination unit.

IPC Classes  ?

• G01R 31/34 - Testing dynamo-electric machines
• H02K 7/14 - Structural association with mechanical loads, e.g. with hand-held machine tools or fans
• H02P 21/22 - Current control, e.g. using a current control loop
• H02P 27/08 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters with pulse width modulation

Abstract

A technique that can prevent a worker from being exposed to contaminants when an abnormality has occurred in a remote blower of a building is provided. A safety cabinet includes: an opening portion for exhausting air in a work space; an exhaust duct connected to the opening portion; a remote blower that sends the air in the work space to outdoors from the exhaust duct; a backup exhaust duct branched from the exhaust flow path of the exhaust duct; a backup remote blower that sends the air in the work space to outdoors from the backup exhaust duct; and a safety cabinet control unit that transmits an startup signal to the backup remote blower when it detects that the remote blower has stopped operating.

IPC Classes  ?

• B01L 1/00 - EnclosuresChambers
• B08B 15/02 - Preventing escape of dirt or fumes from the area where they are producedCollecting or removing dirt or fumes from that area using chambers or hoods covering the area

Abstract

A safety cabinet includes: an opening portion for exhausting air in a work space; an exhaust duct connected to the opening portion; a remote blower that sends the air in the work space to outdoors from the exhaust duct; and a safety cabinet control unit that transmits a signal to an arithmetic processing device, which notifies the worker based on the values indicating the operating state of the remote blower.

IPC Classes  ?

• F24F 11/526 - Indication arrangements, e.g. displays giving audible indications
• B01L 1/00 - EnclosuresChambers
• F24F 3/163 - Clean air work stations, i.e. selected areas within a space to which filtered air is passed

Abstract

To provide a compressor and a control method of a compressor that improve the reliability of an operation under a high ambient temperature environment. An operation of an electric motor is controlled on the basis of either a normal operation mode or a heat safety mode in which a set pressure for regulating an operation of the electric motor according to a pressure in a tank for storing compressed air is lowered either when an ambient temperature exceeds a first temperature threshold value or when a difference between the ambient temperature and the temperature of a discharge section area exceeds a temperature difference threshold value for HS mode.

IPC Classes  ?

• F25B 49/02 - Arrangement or mounting of control or safety devices for compression type machines, plants or systems

Abstract

A technique is provided that can prevent damage to a waste heat recovery heat exchanger. An air compressor includes cooling heat exchangers that perform heat exchange between cooling water and compressed air, and a cooling liquid pipe through which the cooling water flows. A waste heat recovery unit includes waste heat recovery heat exchangers that perform heat exchange between waste heat recovery water and compressed air, a waste heat recovery liquid pipe through which the waste heat recovery water flows, a waste heat recovery liquid inlet pipe and a waste heat recovery liquid outlet pipe that connect an auxiliary cooling facility and the waste heat recovery liquid pipe, flow path switching three-way valves that open and close the inlet and outlet pipes, and a temperature controller that controls the valves. When the temperature of the waste heat recovery water exceeds a threshold, the temperature controller opens the inlet and outlet pipes by controlling the three-way valves.

IPC Classes  ?

• F28F 27/00 - Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
• F28D 21/00 - Heat-exchange apparatus not covered by any of the groups

Abstract

An air compression device having a buffer tank provided at a predetermined position in an air return pipe for temporarily storing return air is provided.

IPC Classes  ?

• F04B 41/02 - Pumping installations or systems specially adapted for elastic fluids having reservoirs
• F04B 41/06 - Combinations of two or more pumps
• F04B 49/22 - Control of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for in, or of interest apart from, groups by means of valves
• F04B 53/08 - CoolingHeatingPreventing freezing

Abstract

To provide a power conversion device and a motor control system capable of implementing stable speed control even if a speed response is enhanced. Therefore, there are provided a power converter 2 that converts DC power into AC power and outputs the AC power to an induction motor based on AC voltage command values vu*, vv*, and vw* in stationary coordinates, and a controller CT that calculates the voltage command values in the stationary coordinates by vector control. The controller CT adds, to a steady-state value of a slip frequency determined by a d-axis current (id), a q-axis current (iq), and a secondary time constant (T2), a transient value determined by differential calculation using the d-axis current (id) and the q-axis current (iq) to calculate a slip frequency command value ωs**.

IPC Classes  ?

• H02P 21/14 - Estimation or adaptation of machine parameters, e.g. flux, current or voltage
• H02P 27/06 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters

Abstract

A clean air equipment that has a method for determining filter clogging that is both accurate and cost-effective. A clean air equipment having a filter, a wind speed sensor that measures the air speed after passing through the filter, a differential pressure sensor that measures the pressure difference before and after the filter, forming the second life prediction line so as to fit a changing rate of the first life prediction line obtained from the initial value of either one of the wind speed sensor or the differential pressure sensor and the value at the time of correction measurement with a changing rate of the second life prediction line obtained from another one of the wind speed sensor or the differential pressure sensor, managing the filter based on the first life prediction line or the second life prediction line.

IPC Classes  ?

• B01D 46/00 - Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
• B01D 46/44 - Auxiliary equipment or operation thereof controlling filtration

Abstract

An operation of an inkjet recording device is performed without performing operations, such as interruption of an ink circulation process in an idle state and resetting, in a state in which execution of the ink circulation process is maintained. Ink is supplied to a nozzle to perform printing on a printing target. An idle-mode ink circulation process circulates ink in an idle state, the idle-mode ink circulation process repeating the circulation of the ink in a path, and a standby state at a predetermined time interval. An operation display unit displays a standby screen for the idle-mode ink circulation process and displays information for operating the inkjet recording device on the standby screen in a state in which execution of the idle-mode ink circulation process is maintained. The inkjet recording device receives an operation of the inkjet recording device based on the information displayed on the standby screen.

IPC Classes  ?

• B41J 2/17 - Ink jet characterised by ink handling
• B41J 2/045 - Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
• B41J 2/165 - Prevention of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
• B41J 2/175 - Ink supply systems

Abstract

High frequency excitation heating equipment has a first iron core support member disposed inside the iron core, a second iron core support member disposed outside the iron core, and a fastening member fastened while insulating the first and second iron core support members, the first and second iron core support members are acyclic. A high-frequency induction coil disposed around the first iron core support member, the second iron core support member, and the iron core. A power source supplies AC power to the high-frequency induction coil. A function generator generates alternating current. A program adjuster generates a control signal that commands the function generator. At least one of the first and second iron core support members has a temperature sensor, and the measured value of the temperature sensor is input to the program controller, which feedback controls the AC power according to the measured value of the temperature sensor.

IPC Classes  ?

• H05B 6/36 - Coil arrangements
• H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
• H05B 6/04 - Sources of current
• H05B 6/06 - Control, e.g. of temperature, of power

Abstract

In order to achieve high accuracy of detecting a sign of cooling performance deterioration, a sign detection system includes: a pre-processing unit acquiring operation data of a time series about a cooling target apparatus and extracting features from the operation data, the cooling target apparatus including a temperature rise source and a cooling unit cooling the temperature rise source, and a sign detection unit diagnosing cooling performance of the cooling unit, based on an output obtained by inputting the features extracted from the operation data for diagnosis to a sign detection model, the sign detection model being constructed using training data generated based on the features extracted from the operation data for training and a label indicating a state of the cooling performance. The sign detection model is constructed using the training data generated based on the features extracted from the operation data including the operation statuses corresponding to the being operating and the being on standby. When diagnosing the cooling performance, the sign detection unit inputs the features extracted from the operation data including only the operation statuses corresponding to the being operating, to the sign detection model.

IPC Classes  ?

• G05B 23/02 - Electric testing or monitoring
• G06F 11/30 - Monitoring

Abstract

In an inkjet recording device that uses a pigment-based ink, an ink device is provided in which ink sticking in an ink path and the precipitation of pigment components in an ink container, which occur when printing is not performed over a long period, can be suppressed, and the pigment-based ink can be jetted in a short time at the restart of the printing. The inkjet recording device uses a pigment-based ink. A control section 7 executes a printing mode performing a printing operation and a rest mode not performing the printing operation. In the rest mode, the control section 7 forcibly performs the stirring of a pigment-based ink 68A in an ink container 31 and the circulation of the ink in an ink circulation path not including a printing head (S300) or the circulation of the ink in an ink circulation path including the printing head (S400). Accordingly, it is possible to suppress ink sticking in the ink circulation path and the precipitation of pigment components in an ink container, which occur when printing is not performed over a long period, and to jet the pigment-based ink in a short time at the restart of the printing.

IPC Classes  ?

• B41J 2/185 - Ink-collectorsInk-catchers
• B01F 33/45 - Magnetic mixersMixers with magnetically driven stirrers
• B01F 35/22 - Control or regulation
• B01F 101/35 - Mixing inks or toners
• B41J 2/035 - Ink jet characterised by the jet generation process generating a continuous ink jet by electric or magnetic field
• B41J 2/175 - Ink supply systems
• B41J 2/20 - Ink jet characterised by ink handling for preventing or detecting contamination of compounds

Abstract

A scroll-type fluid machine includes a casing that houses an orbiting scroll and a plurality of auxiliary crank mechanisms, a leg section that is disposed on a radially outer edge portion of the casing and supports the casing, and a reinforcing rib that extends on the leg section in the axial direction. The casing includes bearing bosses that each house a casing-side bearing of the auxiliary crank mechanism. The bearing boss has an outer circumferential surface and an end surface that form part of the outer surface of the casing. The reinforcing rib extends from the leg section to the bearing boss so as to be connected to the leg section and to the outer circumferential surface and the end surface of the bearing boss.

IPC Classes  ?

• F04C 18/02 - Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents

Abstract

To provide a package type compressor capable of recovering carbon dioxide in the air while reducing pressure loss. Provided is a package type compressor including: a compressor main body that compresses air; a cooler that cools, by heat exchange with air, compressed air discharged from the compressor main body; a housing that houses the compressor main body and the cooler; at least one first air inlet that is formed in the housing and takes in the air before being compressed by the compressor main body and the air before being used by the cooler; and a first air outlet that is formed in the housing and discharges air after being used by the cooler, in which at least one adsorption material for adsorbing carbon dioxide in the air, and at least one holding section for holding the adsorption material so as to be spaced apart outward with respect to at least one of the first air inlet and the first air outlet are provided.

IPC Classes  ?

• B01D 53/04 - Separation of gases or vapoursRecovering vapours of volatile solvents from gasesChemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
• B01D 53/26 - Drying gases or vapours

Abstract

To provide a scroll-type fluid machine capable of improving the workability of connection between a discharge cylinder of a fixed scroll member and a discharge pipe or a joint. A scroll-type compressor includes: a fixed scroll member that has an end plate, a wrap, cooling fins, and a discharge cylinder; an orbiting scroll member that has an end plate and a wrap; a driving shaft that causes the orbiting scroll member to orbit relative to the fixed scroll member; and a fixed cover that is attached to a tip side of the cooling fins of the fixed scroll member. The discharge cylinder 2 of the fixed scroll member extends from the end plate of the fixed scroll member beyond an inner surface of the fixed cover.

IPC Classes  ?

• F04C 29/04 - HeatingCoolingHeat insulation
• F04C 18/02 - Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents

Abstract

A method for controlling an inkjet recording device includes providing a print head and providing a main body. The method also includes controlling, when the print head is set in the head cleaning unit, the supply of the ink to the nozzle and the recovery of the discharged ink from the gutter, wherein the gutter is located between the nozzle and recovery container. The method also includes providing a plurality of ink circulation path. The method also includes connecting, a pump to the circulation paths, and circulating, using the pump, the ink in a state where the print head is set in the head cleaning unit.

IPC Classes  ?

• B41J 2/02 - Ink jet characterised by the jet generation process generating a continuous ink jet
• B41J 2/08 - Ink jet characterised by jet control for many-valued deflection charge-control type
• B41J 2/165 - Prevention of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
• B41J 2/175 - Ink supply systems
• B41J 2/185 - Ink-collectorsInk-catchers

Abstract

A screw fluid machine that suppresses power loss by preventing a residual volume from being generated at a discharge-side end face while thinning a tooth tip of a male rotor is provided. In a screw fluid machine in which a male rotor 2 including a plurality of teeth and a female rotor corresponding to the male rotor 2 are rotated to compress and convey a fluid, when viewed in an axial direction, a cross-sectional tooth profile 21d in a first section in the vicinity of an end portion on a discharge side of the male rotor 2 is formed thick so as to be located outside a pitch point-centered circle CP at a tooth tip and on an advancing surface side of the tooth tip, and a cross-sectional tooth profile 21s in a second section in the vicinity of an end portion on a suction side is formed thin so as to be located inside the pitch point-centered circle CP. A cross-sectional tooth profile of the male rotor 2 between the first section and the section in the axial direction is configured to continuously change from a second cross-sectional shape to a first cross-sectional shape.

IPC Classes  ?

• F04C 18/16 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
• F04C 29/02 - LubricationLubricant separation

Abstract

To provide a power conversion device capable of making miniaturization and a stable operation compatible with each other. Therefore, a smoothing capacitor 21 outputs a high-side potential of a DC voltage, and a smoothing capacitor 22 is connected in series with the smoothing capacitor 21 and outputs a low-side potential of the DC voltage. An inverter circuit 103 converts the DC voltage output from the smoothing capacitors 21 and 22 into an AC voltage. A control circuit 104 controls the inverter circuit 103. The inverter circuit 103 is mounted on a main circuit board 61. Each of the smoothing capacitors 21 and 22 is arranged such that an axial direction, which defines its longest size, is substantially parallel to a plane direction of the main circuit board 61. The smoothing capacitor 21 is arranged at a position farther away from the control circuit 104 than the smoothing capacitor 22.

IPC Classes  ?

• 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
• H02M 7/00 - Conversion of AC power input into DC power outputConversion of DC power input into AC power output

Abstract

A liquid-cooled screw compressor (100) that takes in a gas and generates a compressed gas includes a screw rotor (2, 3), a casing (1) that stores the screw rotor (2, 3) and forms a working space (C) together with the screw rotor (2,3), and a cartridge (6) that is a separate member from the casing (1). A liquid feed path (7) that supplies a liquid to the working space (C) is formed by the casing (1) and the outer surface of the cartridge (6).

IPC Classes  ?

• F04C 29/04 - HeatingCoolingHeat insulation
• F04C 18/16 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type

Abstract

An encoder model and a decoder model, which are machine learning models, are used for inspection of the inspection target. The encoder model is a model in which inspection target data is input and an abnormality degree of the inspection target is output. The decoder model is a model in which an OK/NG value, which is a value indicating whether the inspection target is normal or abnormal, and a feature amount of data of the inspection target are input, and when the input OK/NG value indicates an abnormality, restored data of the inspection target based on the input feature amount is output.

IPC Classes  ?

• G06T 7/00 - Image analysis

Abstract

To provide a packaged air-cooled air compressor capable of recommending cooler cleaning at the proper timing while controlling cost increase. The package-type, air-cooled air compressor has two cooling paths to the air-cooled cooler and motor, two cooling air intake ports where these cooling paths take in outside air, a fan and outlet that collectively exhaust cooling air after cooling the cooler and motor to the outside, and a bearing located at both ends of the motor shaft. The controller calculates the temperature difference between the bearings located upstream (anti-load side) and downstream (load side) of the motor shaft in the cooling air flow direction, and determines that the cooler is clogged if the temperature difference is less than a threshold value.

IPC Classes  ?

• F04C 28/28 - Safety arrangementsMonitoring
• F04C 18/16 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
• F04C 29/04 - HeatingCoolingHeat insulation

Abstract

Efficient recovery of thermal energy. An exhaust heat recovery system comprising: a plurality of gas compressors; a exhaust heat recovery equipment; and a controller, wherein further comprising a exhaust heat recovery path connecting the plurality of gas compressors and the exhaust heat recovery equipment, and the plurality of gas compressors can select whether or not to use the exhaust heat recovery path based on instructions from the controller, the controller compares the set required water temperature with the supply water temperature, which is the temperature of the water supplied from the exhaust heat recovery equipment to the outside, and at least one of the plurality of gas compressors is instructed to use the exhaust heat recovery path when the supply water temperature is lower than the required water temperature.

IPC Classes  ?

• F22D 1/18 - Feed-water heaters, e.g. preheaters with water tubes arranged otherwise than in the boiler furnace, fire tubes, or flue ways and heated indirectly
• F04B 39/06 - CoolingHeatingPrevention of freezing

Abstract

The present invention achieves a more lightweight rotor of a rotating electrical machine, and reduces the magnetic resistance of the q-axis while reducing the amount of rotor deformation during high-speed rotation. A plurality of magnet insertion holes 126a-126c of a rotator are located line-symmetrically about the d-axis, which is the magnetic pole central axis. On the inner peripheral side of the magnet insertion holes 126a, 126c close to the q-axis, lightening holes 128, 129 shaped to have curves are formed. The cross-sectional shapes of the lightening holes 128, 129 are arranged such that a nearest point 70 from a rotation axis A1 coincides with a curved portion having the largest curvature. The magnet insertion holes 126a, 126c and a straight part of the lightening holes are arranged to be at a constant distance S for the entirety of the opposing portions thereof, wherein an outermost peripheral position 50 on the side forming a lightening hole is positioned farther to the outer periphery than an end part 60 closest to the central axis of the rotator on the side forming a magnet insertion hole.

IPC Classes  ?

• H02K 1/276 - Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
• H02K 1/32 - Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium

Abstract

A rotary motor comprises a stator; and a rotor having a core with a plurality of permanent magnets embedded therein and held inside the stator for rotation around a rotation axis, wherein the magnets are in the outer circumference of the core, spaced apart in a circumferential direction, and have magnetic poles at both ends in the circumferential direction. The core has a plurality of lightening holes in the circumferential direction on the rotation axis side of the permanent magnets; each hole having a bottom wall surface extending in the circumferential direction on the rotation axis side, an outer circumferential wall surface on the outer circumferential side, and a side wall surface between the bottom wall surface and the outer wall surface; and the outer wall surface has an inclined portion that approaches the rotation axis as it moves from the center of the permanent magnets toward the magnetic pole.

IPC Classes  ?

• H02K 1/276 - Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]

Abstract

A technique adjusts a control parameter between a motion control system and a low-order system for motor control. A controller inputs a motion control deviation based on computation of a motion control command and a motion control response into a first control device, and outputs a servo control command based on a first control gain. A servo amplifier as a motor control apparatus includes a second control device, a power converter, and a control gain estimator. The motor control apparatus inputs a signal based on the servo control command and the motion control response into the second control device, inputs a signal output from the second control device into the power converter, and supplies a motor with a signal from the power converter. The control gain estimator inputs the servo control command and the motion control deviation or the motion control command therein and estimates the first control gain.

IPC Classes  ?

• H02P 23/00 - Arrangements or methods for the control of AC motors characterised by a control method other than vector control
• H02P 23/14 - Estimation or adaptation of motor parameters, e.g. rotor time constant, flux, speed, current or voltage

Abstract

There included are a rotor (3), a stator core (21) having a plurality of slots (21c) between the rotor (3) and a back yoke (21a), resin bobbins (22) each of which includes a plurality of coil insertion holes (22a) arranged along a radial direction of the stator core (21) and is fit into the slot (21c), and a first gap hole (22ca) provided to a side wall (22c) that is closest to the back yoke (21a) among side walls of the bobbin (22).

IPC Classes  ?

• H02K 1/16 - Stator cores with slots for windings
• H02K 3/12 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
• H02K 3/32 - Windings characterised by the shape, form or construction of the insulation

Abstract

A power regeneration converter is disposed between an inverter outputting a three-phase alternating current (AC) to an electric motor and a three-phase AC power source which is an input system, and supplies induced electric power generated by the motor to the three-phase AC power source, wherein a control unit calculates a three-phase AC voltage target value for performing PWM based on a three-phase AC voltage of the input system detected by an AC voltage detection unit, a three-phase AC detected by an AC detection unit, and a direct current (DC) voltage between the inverter and the power regeneration converter detected by a DC voltage detection unit, and controls the DC voltage between the inverter and the power regeneration converter based on the calculated three-phase AC voltage target value. An output DC voltage is maintained, overmodulation, noise, switching loss, heat generation, and insulation degradation of a load device are decreased.

IPC Classes  ?

• 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
• H02M 1/00 - Details of apparatus for conversion
• 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 7/79 - Conversion of AC power input into DC power outputConversion of DC power input into AC power output with 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

Abstract

The present invention includes: a stator core (21) having a slot (21a); a bobbin (22) fitted in the slot (21a) and having a through hole (22c) penetrating in an axial direction of the stator core (21); a coil (23) inserted in the through hole (22c); a plurality of protrusions (22e) that protrude from at least one of an inner periphery of the through hole (22c) and an outer periphery of the coil (23), and guide the position of the coil (23) in the through hole (22c); and a resin filled on the periphery of the coil (23) in the through hole (22c).

IPC Classes  ?

• H02K 3/34 - Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
• H02K 1/16 - Stator cores with slots for windings
• H02K 3/12 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots

Abstract

The invention provides an inkjet marking apparatus and an inkjet marking system enabling it to remotely perform maintenance management including a print head cleaning process and the like. There is disclosed an inkjet marking apparatus equipped with a print head including a nozzle which spouts out ink while the ink turns into particles, a charging electrode which gives charge to ink particles spouted out, a deflecting electrode which deflects the charged ink particles, and a gutter which collects non-used ink; a main unit equipped with an ink supply path to supply ink in an ink container to the print head, an ink collection path to collect ink not used for printing into the ink container, a solvent supply path to supply a solvent in a solvent container to the ink container, and flow rate regulators which regulate flows of the ink and the solvent in these respective paths; a main unit controller which controls operation of the flow rate regulators in the main unit and the print head; and a head receptacle unit including a head holding part to set and hold the print head secured in place and a print head detector which detects that the print head has been set secured in place, wherein the main unit controller starts jetting of the ink from the nozzle when a preset start time comes, provided that it is detected that the print head has been set secured in the head receptacle unit.

IPC Classes  ?

• B41J 2/02 - Ink jet characterised by the jet generation process generating a continuous ink jet
• B41J 2/085 - Charge means, e.g. electrodes
• B41J 2/09 - Deflection means
• B41J 2/185 - Ink-collectorsInk-catchers
• B41J 3/46 - Printing mechanisms combined with apparatus providing a visual indication
• B41J 29/393 - Devices for controlling or analysing the entire machine
• G06Q 10/0631 - Resource planning, allocation, distributing or scheduling for enterprises or organisations

Abstract

A rotating electric machine including: a rotor (200); a stator core (110) having a slot (111) provided with an opening portion (112) on the rotor (200) side; a bobbin (150) that is fitted into the slot (111), and into which a coil (140) is inserted; a projecting portion (152) disposed on the opening portion (112) side in the bobbin (150); and a resin (160) fixing the stator core (110), the coil (140), and the bobbin (150) to each other.

IPC Classes  ?

• H02K 3/48 - Fastening of windings on the stator or rotor structure in slots
• H02K 1/16 - Stator cores with slots for windings
• H02K 3/12 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots

Abstract

To provide an inkjet recording device on which maintenance management such as printing head cleaning processing can remotely be performed, and an inkjet recording system. The inkjet recording system includes the inkjet recording device, a server connected to the inkjet recording device, a network connected to the server, and an external control device connected to the network to control the inkjet recording device via the server. The inkjet recording device includes: a printing head including a nozzle that particulates ink and ejects ink particles, a charging electrode that charges the ink particles, a deflection electrode that deflects the charged ink particles, and a gutter that collects the unused ink; a main body control unit that controls the printing head; and a head mounting unit including a printing head mounting portion for containing the print head and a printing head detector that determines whether or not the printing head is contained. The external control device includes: a head mounting checking means that at least checks whether or not a state where the printing head is mounted in the head mounting unit is established; and an ink ejection checking means that checks whether or not the ink is ejected from the nozzle of the printing head.

IPC Classes  ?

• B41J 29/393 - Devices for controlling or analysing the entire machine
• B41J 2/085 - Charge means, e.g. electrodes
• B41J 2/165 - Prevention of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
• B41J 2/175 - Ink supply systems
• B41J 2/185 - Ink-collectorsInk-catchers
• B41J 29/377 - Cooling or ventilating arrangements
• G06F 3/12 - Digital output to print unit

Abstract

A compressor has a piston that has a piston ring groove in an outer circumferential surface formed of a curved surface and reciprocates while rocking in a cylinder, a piston ring that is mounted in the piston ring groove and slides on an inner circumferential surface of the cylinder, and a crankshaft that reciprocates the piston through a connecting rod. A center axis of the cylinder is disposed at a position separate from a rotation axis of the crankshaft. A rotation stopper for the piston ring is disposed in the piston ring groove. Joint gaps of the piston ring are located on a side of the outer circumferential surface of the piston pressed against the inner circumferential surface of the cylinder in a compression process.

IPC Classes  ?

• F04B 53/02 - Packing the free space between cylinders and pistons
• F04B 39/00 - Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups
• F16J 9/24 - Members preventing rotation of rings in grooves
• F16J 9/28 - Piston-rings, seats thereforRing sealings of similar construction in general characterised by the use of particular materials of non-metals

Abstract

A suction flow path of a screw compressor includes a male-side flow path that opens in an axial direction with respect to working chambers in a suction process on the male rotor side and extends from a starting end positioned on one side of a virtual plane to a first termination end positioned on the other side; and a female-side flow path on the female rotor side that extends from the starting end to a second termination end positioned on the other side of the virtual plane. The male-side or the female-side first flow path wall is configured such that at least a partial area in a range from the starting end to the first or the second termination end is closer to a male-side or female-side rotor lobe section from the starting end side toward the first or second termination end side.

IPC Classes  ?

• F04C 18/16 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
• F04C 29/12 - Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet

Abstract

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IPC Classes  ?

• F04C 18/16 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
• F04C 29/04 - HeatingCoolingHeat insulation

Abstract

A transfer device receives data from a transmission source device, and stores the program group and initial setting information, the transfer device includes: wherein each program in the program group matches a reception protocol pertaining to reception of data from the transmission source device, a processing protocol pertaining to the process, or a transmission protocol pertaining to transmission of data to the destination device, wherein the initial setting information defines designation information that designates, for each protocol, the program matching the protocol, and wherein the processor executes: a reception process of receiving input of a first setting parameter to a first program that matches the reception protocol and the transmission protocol; an acquisition process of acquiring first designation information for designating the first program with reference to the initial setting information; and an activation process of activating the first program using the first designation information and the first setting parameter.

IPC Classes  ?

• H04L 41/0806 - Configuration setting for initial configuration or provisioning, e.g. plug-and-play
• H04L 67/06 - Protocols specially adapted for file transfer, e.g. file transfer protocol [FTP]
• H04L 69/18 - Multiprotocol handlers, e.g. single devices capable of handling multiple protocols

Abstract

A sliding material includes a resin, first particles disposed in the resin and composed of an inorganic material, and second particles disposed in the resin and composed of an inorganic material whose Vickers hardness is higher than a Vickers hardness of the first particles. When a value obtained by dividing a Vickers hardness of the second particles by the Vickers hardness of the first particles is defined as a hardness ratio and when a value obtained by dividing a contained amount of the first particles with respect to the resin by a contained amount of the second particles with respect to the resin is defined as a content ratio, a value obtained by dividing the hardness ratio by the content ratio is greater than or equal to 0.3 and less than or equal to 2.8.

IPC Classes  ?

• C10M 107/38 - Lubricating compositions characterised by the base-material being a macromolecular compound containing halogen
• C10M 125/04 - MetalsAlloys
• C10M 125/02 - CarbonGraphite
• C10M 125/22 - Compounds containing sulfur, selenium or tellurium
• C10N 10/02 - Groups 1 or 11
• C10N 10/06 - Groups 3 or 13
• C10N 20/00 - Specified physical properties of component of lubricating compositions
• C10N 40/30 - Refrigerator lubricant

Abstract

A gas compressor includes: a low pressure gas path that introduces compressed gas delivered from a low pressure stage compressor body into a high pressure stage compressor body; a first low pressure gas release valve disposed on a first low pressure branch path branched from the low pressure gas path; a high pressure gas path that introduces the compressed gas delivered from the high pressure stage compressor body to a demand destination; a first high pressure gas release valve disposed on a first high pressure branch path branched from the high pressure gas path; and a control device. The first low pressure branch path is disposed on a downstream side of a heat exchanger for low pressure stage exhaust heat recovery. The first high pressure branch path is disposed on a downstream side of a heat exchanger for high pressure stage exhaust heat recovery. The control device opens the first low pressure gas release valve and the first high pressure gas release valve at a time of switching from load operation to no-load operation.

IPC Classes  ?

• F04C 18/16 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
• F04C 29/02 - LubricationLubricant separation
• F04C 29/04 - HeatingCoolingHeat insulation

Abstract

Provided is a power conversion device that realizes stable, highly accurate, and highly efficient control characteristics by suppressing pulsation in a speed of a driven motor and suppressing pulsation in torque. The power conversion device that drives a magnet motor includes: a first filter unit that includes a primary system transfer function filter that varies in correspondence with a pulsating component of the magnet motor, and computes a second speed estimation value from a speed command value and a first speed estimation value; a speed control unit that computes a first torque current command value from the speed command value and the second speed estimation value; and a second filter unit that includes a secondary system transfer function filter that varies in correspondence with the pulsating component, and computes a second torque current command value from the first torque current command value. Power to be supplied to the magnet motor is controlled on the basis of the second torque current command value.

IPC Classes  ?

• H02P 21/05 - Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation specially adapted for damping motor oscillations, e.g. for reducing hunting
• H02P 21/18 - Estimation of position or speed
• H02P 27/06 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters

Abstract

A gateway device collects equipment data and judges whether or not there is any anomaly in the collected equipment data according to a judgement rule(s). An analysis server having an analysis unit transmits and receives information to and from the gateway device and analyzes the received information. An input-output unit executes input and output of the server judgement rule(s), and the gateway device transmits data including a judgement result and the equipment data to the analysis server, wherein the analysis server analyzes the transmission data, and if equipment data indicating an anomaly different from an anomaly defined by the judgement rule(s) exists in the equipment data, the analysis server updates information of the server judgement rule(s) based on input information and transmits the updated information to the gateway device; and the gateway device updates information of the judgement rule(s) based on the server judgement rule information.

IPC Classes  ?

• G06F 11/30 - Monitoring
• H04L 12/66 - Arrangements for connecting between networks having differing types of switching systems, e.g. gateways

Abstract

To provide a power conversion device capable of realizing stable and highly-accurate control of a magnet motor. A processor of a power conversion device computes a first power (first reactive power) from voltages (voltage command values) and currents (current detection values) of a magnet motor. The processor computes a second power (second reactive power) from electric circuit parameters of the magnet motor, steady components (current detection values) and transient components of the current of the magnet motor, and a frequency estimation value of the magnet motor. The processor estimates a phase deviation (phase error) indicating the deviation (difference) between the phase of control and the phase (phase of the magnet) of the magnetic flux of the magnet motor such that the first power follows the second power. The processor computes the frequency estimation value from the estimation value of the phase deviation.

IPC Classes  ?

• G06F 1/26 - Power supply means, e.g. regulation thereof
• G01R 21/133 - Arrangements for measuring electric power or power factor by using digital technique
• G01R 25/00 - Arrangements for measuring phase angle between a voltage and a current or between voltages or currents
• H02P 21/00 - Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
• H02P 21/14 - Estimation or adaptation of machine parameters, e.g. flux, current or voltage
• H02P 21/24 - Vector control not involving the use of rotor position or rotor speed sensors
• H02P 27/06 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters

Abstract

A management system includes: a measurement data acquisition unit that acquires measurement data, the measurement data being time-series data related to operation of a device; an index computation unit that computes an index based on the measurement data; a credit calculation unit that compares the index before and after a change is made to the device and calculates credits as compensation for reducing an emission of greenhouse gas; and a credit management unit that associates part of the calculated credits with a user of the device. The credit management unit associates part of the calculated credits with an operator of the management system or a producer of the device.

IPC Classes  ?

• G06Q 30/0208 - Trade or exchange of goods or services in exchange for incentives or rewards
• G06Q 30/0601 - Electronic shopping [e-shopping]

Abstract

An oil feed type compressor includes a compressor body (2) that compresses a gas while oil is being injected therein, a first oil separator (6) that separates oil from the compressed gas delivered from the compressor body (2), a second oil separator (8) that further separates oil from the compressed gas from which the oil has been separated by the first oil separator (6), the second oil separator (8) having a reservoir (8bd) for storing the separated oil, a delivery pipe system (90) through which the compressed gas from which the oil has been separated by the second oil separator (8) flows, an oil discharge passage (10) that discharges the oil having been stored in the reservoir (8bd) from the reservoir (8bd), a valve body (10a) included in the oil discharge passage (10), and a controller (11) that controls the opening of the valve body (10a) over time.

IPC Classes  ?

• F04C 29/02 - LubricationLubricant separation
• F04C 18/16 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type

Abstract

A compressor includes a compressor body, a motor, a current sensor that detects a current value of the motor, and a control device that controls the drive of the motor, and the control device computes, through the current sensor, a current value (I1) of the motor at a point in time when first time has elapsed from the start of the motor and a current value (I2) of the motor at a point in time when second time longer than the first time has elapsed from the start of the motor, and makes a notification in a different mode.

IPC Classes  ?

• F04B 49/06 - Control using electricity
• F04B 35/04 - Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric

Abstract

A motor control device that controls a machine comprising an identification part estimating moment of inertia and viscous friction, a speed command generation part generating a speed command obtained by integrating an acceleration command, a difference signal calculation part calculating a difference signal from the acceleration command with time difference, and an identification interval judgment part determining a valid interval for operate the identification part based on the difference signal, and operating the identification part in the valid interval and driving the motor based on the speed command generated by the speed command generating part, wherein the identification part estimates the moment of inertia and the viscous friction.

IPC Classes  ?

• H02P 21/14 - Estimation or adaptation of machine parameters, e.g. flux, current or voltage
• H02P 21/18 - Estimation of position or speed

Abstract

A power converter comprising, a power conversion unit converts DC voltage to AC voltage corresponding to the device to be operated, a current detection section detects the output current from the power conversion section, a memory section that stores the reference value of the output current detected by the current detection section or the reference value of the value to be monitored from the device to be operated, and the upper and lower limit values determined from the reference value, a control unit controls the power conversion unit, wherein the control unit calculating a frequency of states exceeding the upper limit or the frequency of states below the lower limit, comparing the frequency with a predetermined frequency to determine if there is an abnormality.

IPC Classes  ?

• G01R 23/15 - Indicating that frequency of pulses is either above or below a predetermined value or within or outside a predetermined range of values, by making use of non-linear or digital elements
• H02P 27/06 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters

Abstract

There is provided an oil-free air compressor that prevents oil from entering a compressor body by preventing a reverse rotation of the compressor body when the compressor is in shutdown, while improving the rust prevention effect, and that has improved reliability. An oil-free air compressor 100 includes an oil-free compressor body 1 that compresses air, and that outputs the compressed air; a cooler 5 that is connected to the compressor body, and that cools the compressed high-temperature air; a dry air supply mechanism for supplying dry air to an output side of the compressor body; and a mechanism for preventing a reverse rotation of the compressor body during a shutdown of the compressor.

IPC Classes  ?

• F04C 29/02 - LubricationLubricant separation
• F04C 18/10 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
• F04C 29/00 - Component parts, details, or accessories, of pumps or pumping installations specially adapted for elastic fluids, not provided for in groups
• F04C 29/04 - HeatingCoolingHeat insulation
• F04C 29/12 - Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet

Abstract

An inkjet recording device automatically determines an excitation voltage of a piezoelectric element for formation of ink droplets. An excitation voltage value is applied to the piezoelectric element of a nozzle over a plurality of sweeping events. A charge voltage is applied to ink droplets generated by the applied excitation voltage value in a plurality of arbitrary printing phases to give an electric charge thereto. A charge amount given to the ink droplets is detected by a sensor to obtain a printing phase. When the relationship of a current printing phase to a previous printing phase detected for each sweeping event is reversed from an increasing side to a decreasing side and two decrease determinations of the printing phase are established in succession, an excitation voltage value corresponding to the printing phase of the sweeping event immediately before the first decrease determination is set as a final excitation voltage value.

IPC Classes  ?

• B41J 2/115 - Ink jet characterised by jet control synchronising the droplet separation and charging time
• B41J 2/02 - Ink jet characterised by the jet generation process generating a continuous ink jet
• B41J 2/025 - Ink jet characterised by the jet generation process generating a continuous ink jet by vibration
• B41J 2/03 - Ink jet characterised by the jet generation process generating a continuous ink jet by pressure
• B41J 2/035 - Ink jet characterised by the jet generation process generating a continuous ink jet by electric or magnetic field
• B41J 2/085 - Charge means, e.g. electrodes
• B41J 2/09 - Deflection means
• B41J 2/12 - Ink jet characterised by jet control testing or correcting charge or deflection
• B41J 2/125 - Sensors, e.g. deflection sensors
• B41J 2/18 - Ink recirculation systems

Abstract

A controller 1 is provided with: a motor controller (10, 11, etc.) that supplies a drive current to a motor 3, which is a power source of a processing device so as to place the motor 3 in a normal operating state, and, in response to multiplexed commands (S1, S2) that are sent from outside and relate to a safety function operation of the processing device, controls the drive current so as to place the motor 3 and the processing device in a safety stop state; and a command monitoring unit 16 that monitors whether or not the commands (High/Low of S1, S2) match each other. If a period during which the commands do not match exceeds an allowable value, the command monitoring unit 16 generates a safety stop signal Sd (High) for safely stopping the motor 3, and continuously sends the safety stop signal Sd (High) to the motor controller. This configuration makes it possible to facilitate construction of a safety system that uses the controller.

IPC Classes  ?

• H02P 3/18 - Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing an AC motor
• H02P 23/00 - Arrangements or methods for the control of AC motors characterised by a control method other than vector control
• H02P 23/14 - Estimation or adaptation of motor parameters, e.g. rotor time constant, flux, speed, current or voltage
• H02P 23/20 - Controlling the acceleration or deceleration
• H02P 27/08 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters with pulse width modulation

Abstract

A screw compressor has first and second screw rotors that suck, compress, and deliver a working medium; a first bearing supporting one end of the first screw rotor coupled to a rotating shaft of a power source; a casing housing the first screw rotor and first bearing; a shaft-sealing member located on an opposite side of a tooth profiler for the first screw rotor relative to the first bearing and seals a through hole in the casing, through which a shaft of the first screw rotor coupled to the output shaft of the power source is inserted; a partition wall isolating the first bearing from the shaft-sealing member; and a liquid-supply route that is provided in the casing and has a first liquid supply opening for supplying a lubricating liquid to the shaft-sealing member and a second liquid supply opening for supplying the lubricating liquid to the first bearing.

IPC Classes  ?

• F04C 2/16 - Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
• F04C 15/00 - Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups

Abstract

The objective is to accurately estimate the electrical constants required for control of a three-phase induction motor for which the electrical constants are unknown. To achieve the above-mentioned purpose, a three-phase induction motor, a fixing mechanism that can fix the rotation axis of the three-phase induction motor, an inverter that drives the three-phase induction motor, a current detection means that detects the current of the three-phase induction motor, the current detection means for detecting the current of the three-phase induction motor and control the three-phase induction motor by using the inverter, wherein the inverter controls the three-phase induction motor with the rotating shaft fixed by the fixing mechanism, energizes DC current and three-phase AC current, and measures the electrical constant of the three-phase induction motor using the control voltage obtained as a result of the energization.

IPC Classes  ?

• H02P 21/22 - Current control, e.g. using a current control loop
• H02P 27/08 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters with pulse width modulation

Abstract

A power converter having a control unit that controls the output frequency, output voltage, and output current of the motor, wherein the control unit calculates a first torque current command from a deviation between a speed reference point and a speed estimate of the motor, The control unit switches the control mode to either a control mode that suppresses pulsation of the motor speed or a control mode that suppresses pulsation of the motor torque, and calculates a second torque current command from the first torque current command and the switched control mode.

IPC Classes  ?

• H02P 21/05 - Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation specially adapted for damping motor oscillations, e.g. for reducing hunting
• H02P 21/02 - Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation specially adapted for optimising the efficiency at low load
• H02P 21/14 - Estimation or adaptation of machine parameters, e.g. flux, current or voltage
• H02P 27/06 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters

Abstract

The consumption of stored energy by an unmanned aerial vehicle is reduced by raising the unmanned aerial vehicle through an unmanned aerial vehicle support device, and accordingly, the cruising distance is increased. An unmanned aerial vehicle support device 10 includes a loading unit 1 and a control unit that controls raising and lowering of the loading unit. The loading unit 1 is raised to a predetermined height to enable the unmanned aerial vehicle 100 to take off. An unmanned aerial vehicle support system includes a server 5 that can communicate with the unmanned aerial vehicle support device 10 and selects a route on which the unmanned aerial vehicle 100 flies and one or more unmanned aerial vehicle support devices 10 on the route based on movement information including at least a departure point and a destination of the unmanned aerial vehicle input from the outside.

IPC Classes  ?

• B64U 70/50 - Launching from storage containers, e.g. from submarine missile tubes
• 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
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02P 27/00 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage

Abstract

A male rotor of a screw compressor has a cooling flow path extending in an axial direction inside a discharge-side shaft section. A groove structure is provided at at least a part of a region on a wall surface of the cooling flow path between the position of a discharge-side end face of the male rotor and a mounting position of a discharge-side bearing. The groove structure includes grooves or a groove that has a lengthwise component in a circumferential direction of the screw rotor and that are spaced apart in the axial direction. A nozzle which is a stationary member is arranged inside the cooling flow path with a gap between the nozzle and the wall surface of the cooling flow path. The nozzle is arranged in such a manner as to overlap at least a part of the groove structure in the axial direction.

IPC Classes  ?

• F04C 29/04 - HeatingCoolingHeat insulation
• F04C 18/16 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type

Abstract

An inkjet printer prints predetermined information comprising dots formed by the ejected ink onto the print target. Images are captured of the predetermined information printed. The printing area of the predetermined information is detected from the image and a criteria position grid in which each of the predetermined divided dot areas is assigned with a dot as a criteria for inspecting the landing position is generated. The dot landing position is inspected relative to the criteria dot position based on a superimposed image of the printing area and the criteria position grid and a degree of displacement of the dot landing position relative to the criteria dot position is determined. A feedback signal for correcting the dot landing position is generated based on the result of the inspection and ink is ejected on the print target based on the corrected dot landing position obtained from the feedback signal.

IPC Classes  ?

• B41J 29/393 - Devices for controlling or analysing the entire machine
• B41J 2/21 - Ink jet for multi-colour printing

Abstract

To provide a temperature indicator manufacturing system and a temperature indicator manufacturing method that reduce the labor and cost of management associated with temperature indicator manufacture. The temperature indicator manufacturing system includes: a marking device 12 that marks a base material with a temperature detecting material containing a matrix material and a temperature indicating material including at least a leuco dye, a color developer, and a decolorant; and an adhesive application device 13 that applies an adhesive onto the temperature detecting material provided as marking on the base material, wherein the adhesive is applied in a state where the temperature detecting material provided as the marking on the base material is solidified, and solidified before the temperature detecting material provided as the marking on the base material is liquefied.

IPC Classes  ?

• B65B 61/26 - Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for marking or coding completed packages
• B41J 3/407 - Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
• C09J 7/29 - Laminated material
• C09J 7/35 - Heat-activated

Abstract

A screw compressor includes a screw rotor including: a rotor lobe part and a discharge-side shaft part; and a casing having a housing chamber that houses the rotor lobe part, a shaft hole through which the discharge-side shaft part passes, and a liquid feed path that introduces a liquid to the shaft hole. A second shaft section of the discharge-side shaft part disposed in the shaft hole and the shaft hole of the casing have a first opposed surface and a second opposed surface opposed to each other with a gap. The discharge-side shaft part has an annular groove on the first opposed surface, and the liquid feed path opens at a position opposed to the annular groove on the second opposed surface of the shaft hole. The second shaft section of the discharge-side shaft part and the shaft hole of the casing have, in an area remoter from the rotor lobe part than the annular groove, a tapered structure as a structure with a diameter smaller toward such a direction as to get further away from the rotor lobe part.

IPC Classes  ?

• F04C 18/16 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
• F04C 27/00 - Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids

Abstract

A management device that can sense abnormality (deterioration) detection on a power transmission mechanism with higher precision and probability is implemented. A management device 30 for a power transmission mechanism that transmits a driving force from an electric motor 13 to a load-side device 12 includes a current acquiring section that acquires a current value of the electric motor 13 per unit process in which the power transmission mechanism is driven, a feature calculating section 121 that divides the unit process into multiple zones and calculates an average current value obtained by averaging the current value of each of the zones, and a diagnosis section 122 that executes abnormality detection. The diagnosis section 122 calculates a state amount estimation value on the basis of the average current value of the multiple zones, and executes abnormality sensing in the unit process on the basis of the state amount estimation value.

IPC Classes  ?

• G01M 99/00 - Subject matter not provided for in other groups of this subclass
• G01R 31/34 - Testing dynamo-electric machines
• G05B 23/02 - Electric testing or monitoring

Abstract

A system receives a first position data set indicating a first positioning position of a shipped product with first frequency and receives a second position data set indicating a second positioning position of the product with second frequency. The system displays, on a map, at least one of n first position display objects respectively indicating n first positions based on N first position data sets and m second position display objects respectively indicating m second positions based on M second position data sets. A display mode for the n first position display objects is different from a display mode for the m second position display objects. The positioning type or the number of satellites is different between the first positioning position and the second positioning position.

IPC Classes  ?

• G06Q 10/0833 - Tracking
• G01S 5/02 - Position-fixing by co-ordinating two or more direction or position-line determinationsPosition-fixing by co-ordinating two or more distance determinations using radio waves
• G01S 19/48 - Determining position by combining or switching between position solutions derived from the satellite radio beacon positioning system and position solutions derived from a further system

Abstract

A communication system includes a management device connected to terminals. The terminal is configured to collect log information, send the log information to the management device, analyze the log information to determine whether an abnormal event occurs in the terminal and determining self-recovery processing, notify the management device of the self-recovery processing for the abnormal event, and execute the self-recovery processing for the abnormal event or recovery processing ordered by the management device. The management device is configured to analyze log information collected from the terminals to determine whether an abnormal event occurs in the terminal, determine recovery processing, receive a notification about self-recovery processing from the terminal, and issue an order to execute the recovery processing for the detected abnormal event to the terminal, depending on whether the notification has been received.

IPC Classes  ?

• G06F 11/00 - Error detectionError correctionMonitoring
• G06F 11/07 - Responding to the occurrence of a fault, e.g. fault tolerance

Abstract

A safety work device having a plurality of HEPA filters in an exhaust system suppresses leakage of contaminants. The work device includes: a work space; a front shutter covering part of a front opening surface of the work space; a work opening portion below the front shutter, through which a worker puts hands to perform work; a rear port provided at a lower portion of a back surface of the work space to suction air; and an exhaust flow path provided behind the back surface of the work space to exhaust the air in the work space. A first HEPA filter for exhaust is disposed in a vertical direction in the exhaust flow path and behind the rear port, and a second HEPA filter for exhaust is disposed in the vertical direction in the exhaust flow path and on a downstream side of the first HEPA filter.

IPC Classes  ?

• B01D 46/42 - Auxiliary equipment or operation thereof
• B01D 46/62 - Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
• B01D 46/88 - Replacing filter elements
• F24F 3/163 - Clean air work stations, i.e. selected areas within a space to which filtered air is passed
• F24F 8/108 - Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using dry filter elements

Abstract

The gas compressor comprising a pre-filter for compressed air is placed at the compressed air intake of the enclosure for primary removal of dust, and an intake filter for further secondary removal of dust, at least one compressor body that draws in and compresses air a motor that drives the compressor body, air cooler cools compressed air, a cooling fan that passes cooling air to the air cooler, a cooling air intake that draws in more than the outside air by means of a cooling fan, a pre-filter for cooling air installed in the cooling air intake, and a controller for controlling an operation of the gas compressor, wherein the controller determines the frequency of cleaning or replacement of the pre-filter for compressed air and the pre-filter for cooling air based on the load factor, which is an indicator of the operating condition.

IPC Classes  ?

• F04B 39/16 - FiltrationMoisture separation
• F04B 39/06 - CoolingHeatingPrevention of freezing
• F04B 41/00 - Pumping installations or systems specially adapted for elastic fluids
• F04B 49/06 - Control using electricity
• F04B 49/20 - Control of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for in, or of interest apart from, groups by changing the driving speed
• F04B 53/08 - CoolingHeatingPreventing freezing
• F04C 18/16 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
• F04C 23/00 - Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluidsPumping installations specially adapted for elastic fluidsMulti-stage pumps specially adapted for elastic fluids
• F04C 28/06 - Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids specially adapted for stopping, starting, idling or no-load operation
• F04C 29/04 - HeatingCoolingHeat insulation

Abstract

An inkjet recording apparatus is made capable of preventing ink from sticking during inactivity of the apparatus and, when viscosity of ink contained in a main ink container has fallen outside an appropriate range of viscosity, adjusting ink viscosity to fall within the appropriate range. The apparatus is configured to perform repetitively supplying a solvent contained in a solvent container to the print head and letting the solvent flow back to an ink container through a circulation path and a collection path at intervals of a certain period of time during inactivity of printing by the print head through controlling the print head and a main body.

IPC Classes  ?

• B41J 2/175 - Ink supply systems
• B41J 2/185 - Ink-collectorsInk-catchers
• B41J 2/195 - Ink jet characterised by ink handling for monitoring ink quality

Abstract

A manager that manages a stock quantity of consumable items used in each of apparatuses, on a predetermined management aggregation basis, an obtainer that obtains consumable item information pertaining to a consumption degree of the consumable items used in each of the apparatuses, from each of the apparatuses, and a determiner that determines necessity of replacement of any of the consumable items, based on the consumable item information about the consumable item obtained by the obtainer, are provided. Based on actual replacement of the consumable item determined to have the necessity of replacement by the determiner, the manager updates the stock quantity in a management aggregation to which the consumable item belongs.

IPC Classes  ?

• G06Q 10/0875 - Itemisation or classification of parts, supplies or services, e.g. bill of materials

Abstract

Provided are a deterioration diagnosis device and deterioration diagnosis method that make it possible to carry out accurate deterioration diagnosis that takes into consideration not only vibration quantity but also other vibration factors such as vibration cycle. This deterioration diagnosis device is provided separately from or so as to be integrated with an electric motor control device comprising a power converter for outputting power for driving an electric motor connected to a device to be driven, a position controller for outputting a speed command value corresponding to the deviation between a position command value and an electric motor position detection value, a speed controller for outputting a torque current command value corresponding to the deviation between the speed command value and an electric motor speed detection value, and a current controller for adjusting the output current of the power converter according to the deviation between the torque current command value and a detection value for the torque current supplied to the electric motor. The deterioration diagnosis device comprises a deterioration diagnosis unit for carrying out electric motor deterioration diagnosis corresponding to electric motor driving information and a vibration information storage device for storing the diagnosis results of the deterioration diagnosis unit. The deterioration diagnosis unit stores a plurality of types of information relating to the electric motor vibration state that have been calculated from the driving information in the vibration information storage device and determines that vibration has occurred if the information relating to the vibration state of the electric motor is larger than a prescribed threshold.

IPC Classes  ?

• G05B 23/02 - Electric testing or monitoring

Abstract

An equipment management device includes: an abnormality detection unit that detects abnormality in equipment on the basis of information obtained by measuring the state of the equipment; a maintenance management unit that manages maintenance of the equipment using the abnormality detection result as input, calculates maintenance costs, and plans a maintenance plan; an operation management unit that manages operation of the equipment using the abnormality detection result as input and plans an operation plan; an energy consumption change estimation unit that estimates change in the energy consumption of the equipment from the abnormality detection result; an energy management unit that manages the energy consumption of the equipment using the estimated change in energy consumption as input and calculates energy costs; and a costs comparison unit that compares the costs information calculated by the energy management unit and by the maintenance management unit.

IPC Classes  ?

• G06Q 10/20 - Administration of product repair or maintenance
• G06Q 50/06 - Energy or water supply

Abstract

Provided is a compressor including a compressor unit that includes a compressor body that compresses gas and a motor that drives the compressor body, and a controller that carries out the operation number control for a plurality of the compressor units. The plurality of compressor units are connected to the same pipe. The controller causes, while continuing the operation number control for the compressor units that are a target of the operation number control, the compressor unit excluded from the target of the operation number control to start.

IPC Classes  ?

• F04B 49/02 - Stopping, starting, unloading or idling control
• F04B 41/06 - Combinations of two or more pumps
• F04B 51/00 - Testing machines, pumps, or pumping installations

Abstract

A transformer diagnostic system having an insulating oil and a winding comprising a detection part detects a temperature at the top and bottom of the insulating oil and hydrogen, an arithmetic unit determines abnormality based on the detected values from the detection part.

IPC Classes  ?

• G01R 31/62 - Testing of transformers
• G01R 31/12 - Testing dielectric strength or breakdown voltage
• H01F 27/32 - Insulating of coils, windings, or parts thereof
• H01F 27/40 - Structural association with built-in electric component, e.g. fuse

Abstract

An oil-feed-type air compressor includes a compressor main body driven by an electric motor, a separator that separates the oil from compressed air delivered from the compressor main body, an oil supply system that supplies the oil separated by the separator to working chambers of the compressor main body, an oil cooler that is disposed in the oil supply system and cools the oil by using cooling air generated by a cooling fan, and a controller. The controller stops the electric motor and the cooling fan when the continuation time of no-load operation has reached a predetermined value. Further, the controller predicts the return timing at which the electric motor is restarted, on the basis of a sensing history of the delivery-side pressure sensor, and predicts the delivery-side temperature of the compressor main body at the return timing.

IPC Classes  ?

• F04D 27/00 - Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
• F04B 49/02 - Stopping, starting, unloading or idling control
• F04C 28/28 - Safety arrangementsMonitoring
• F04D 29/58 - CoolingHeatingDiminishing heat transfer
• F04D 29/70 - Suction gridsStrainersDust separationCleaning

Abstract

A reading system reading a color density of a printed matter formed with an ink whose color density changes depending on a surrounding environment comprises a reading apparatus and an information processing apparatus. The printed matter comprises a first region (reference region) formed with the ink and a second region (sensor region) formed with the same ink for the first region. The first region is in a state of colored or decolored. A color density of the second region is different from that of the first region. The reading apparatus obtains an image including the first region and the second region. The information processing apparatus determines color information of the second region by using color information of the first region as a reference. The type of printed matters includes a circle type, a double-circle type, a dot type, a barcode type, a QR code type and the like.

IPC Classes  ?

• G06K 7/14 - Methods or arrangements for sensing record carriers by electromagnetic radiation, e.g. optical sensingMethods or arrangements for sensing record carriers by corpuscular radiation using light without selection of wavelength, e.g. sensing reflected white light

Abstract

A capacitance acquiring unit acquires a plurality of initial capacitance values indicating capacitance values of a smoothing capacitor in an initial state and acquires a plurality of operation capacitance values indicating capacitance values of the smoothing capacitor in an operation state, and a deterioration determining unit acquires characteristic information indicating a relationship between AC power and the capacitance value of the smoothing capacitor in the initial state on the basis of a statistic amount of the plurality of initial capacitance values acquired by the capacitance acquiring unit and determines a deterioration state of the smoothing capacitor on the basis of a statistic amount of the plurality of operation capacitance values acquired by the capacitance acquiring unit and the characteristic information.

IPC Classes  ?

• G01R 31/01 - Subjecting similar articles in turn to test, e.g. "go/no-go" tests in mass productionTesting objects at points as they pass through a testing station
• G01R 27/26 - Measuring inductance or capacitanceMeasuring quality factor, e.g. by using the resonance methodMeasuring loss factorMeasuring dielectric constants
• G01R 31/28 - Testing of electronic circuits, e.g. by signal tracer
• H02M 1/00 - Details of apparatus for conversion
• 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

Abstract

The servo system includes a servo motor, an encoder for detecting rotation information regarding the position and speed of the servo motor, and a servo amplifier for controlling the driving of the servo motor using the rotation information. The servo amplifier includes an encoder communication interface configured by hardware, a processor for calculating a control command to control the servo motor based on an operation command and the rotation information input through the encoder communication interface, and a control unit for controlling the driving of the servo motor based on the control command. Then, the processor compares the rotation information directly received from the encoder with the rotation information input through the encoder communication interface and diagnoses that there is a failure when both the pieces of rotation information do not match each other.

IPC Classes  ?

• H02P 29/024 - Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load

Abstract

A safety cabinet has an opening portion in the front surface of a work room and a front shutter and supplies clean air to the work room from above. A side slit is provided in the side surface of the work room, air from the provided side slit joins an air flow path suctioned from a front grille of a workbench forming the bottom surface of the work room, and the turbulence of an airstream can be prevented even when a device is installed in the work room.

IPC Classes  ?

• B01L 1/02 - Air-pressure chambersAir-locks therefor
• B01L 1/00 - EnclosuresChambers

Abstract

This screw compressor is provided with a screw rotor, a casing accommodating the screw rotor, and a liquid feed mechanism for feeding a liquid into an operating chamber enclosed by the casing, wherein the pitch of the screw rotor changes in the axial direction from a suction end surface toward a discharge end surface.

IPC Classes  ?

• F04C 18/16 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
• F04C 29/00 - Component parts, details, or accessories, of pumps or pumping installations specially adapted for elastic fluids, not provided for in groups
• F04C 29/02 - LubricationLubricant separation

Abstract

Designation of equipment identifying information for identifying object equipment that is the equipment which is an analysis object, and an analysis item to be analyzed regarding the object equipment is accepted; data of a data type which is required to analyze the accepted analysis item is acquired and a current equipment status of the object equipment is decided based on the acquired data; a diagnosis score for evaluating a current status of the object equipment as a score is calculated based on the decided equipment status of the object equipment and a diagnosis result of the object equipment is decided on the basis of the calculated diagnosis score; and the decided diagnosis result of the object equipment is visualized.

IPC Classes  ?

• G05B 23/02 - Electric testing or monitoring

Abstract

Provided is a novel inkjet printer system that can use machine learning to improve the inspection performance of a printing inspection device. The inkjet printer system includes, in the machine learning, a random test printing function unit (301) that has a function that prints a random dot arrangement that is based on various characters printed in the printing area of a printing target, and an evaluation function training function unit (302) that has a function that optimizes an evaluation function for inspecting a printed image on the basis of a captured image of the results of the printing.

IPC Classes  ?

• B41J 29/393 - Devices for controlling or analysing the entire machine
• B41J 2/505 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by the process of building-up characters applicable to two or more kinds of printing or marking processes from an assembly of identical printing elements
• G06F 30/27 - Design optimisation, verification or simulation using machine learning, e.g. artificial intelligence, neural networks, support vector machines [SVM] or training a model

Abstract

A multi-stage screw compressor includes a plurality of stages of compressor bodies that compress a gas in sequence. Each of the stages of compressor bodies has both male and female rotors that are housed revolvably in a casing in a mutually meshing state. The male and female rotors each include a rotor lobe section having a suction-side end face and a discharge-side end face on one end and the other end thereof in the axial direction and having a twisted lobe extending from the suction-side end face to the discharge-side end face. The male and female rotors in a downstream-stage compressor body of at least one certain stage, excluding an upstream-stage compressor body as the first stage, among the plurality of stages of compressor bodies are each configured such that their lead increases from the suction side in the axial direction of the rotor lobe section toward the discharge side.

IPC Classes  ?

• F04C 23/00 - Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluidsPumping installations specially adapted for elastic fluidsMulti-stage pumps specially adapted for elastic fluids
• F04C 18/08 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
• F04C 18/16 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
• F25B 1/047 - Compression machines, plants or systems with non-reversible cycle with compressor of rotary type of screw type

Abstract

The present invention includes: an identification code generation unit that generates, from information of a company code including a first code that uniquely identifies a management target in a part of a company in the part of the company and a second code that identifies the part of the company, an identification code including a history of the management target; a hash processing unit that hashes the identification code generated by the identification code generation unit according to a hash function and converts the hashed identification code into a meaningless code; and a reference code generation unit that generates a reference code unified for the entire company based on the meaningless code converted by the hash processing unit.

IPC Classes  ?

• G06K 7/14 - Methods or arrangements for sensing record carriers by electromagnetic radiation, e.g. optical sensingMethods or arrangements for sensing record carriers by corpuscular radiation using light without selection of wavelength, e.g. sensing reflected white light
• 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]

Abstract

A dynamo-electric machine comprising: a stator core with plurality of slots, a coil covered with insulated conductor wire, wherein the coil comprising plurality of storages stored in the slots and plurality of coil ends that are outside of the slots, conductor of coil end close to the conductor of the heterophase coil having insulating materials at only one of the surfaces, either the inner diameter surface close to the conductor of the heterophase coil or outer diameter surface of the heterophase coil.

IPC Classes  ?

• H02K 3/40 - Windings characterised by the shape, form or construction of the insulation for high voltage, e.g. affording protection against corona discharges

Abstract

A communication device comprising, a local communication unit communicating with an apparatus, a memory unit storing firmware for the apparatus, if the history of activation and deactivation as an external storage terminal by the apparatus is determined to be a predefined sequence, communication device that is not activated as an external storage terminal or that operates in such a way that the firmware is not visible from the apparatus.

IPC Classes  ?

• G06F 8/65 - Updates

Abstract

A power conversion device comprising, a power converter that outputs signal to the motor to vary the motor's output frequency, output voltage and output current and control unit that controls the power converter, the control unit is, calculating the first power from the output voltage and output current, calculating the second power from the output current, electrical circuit parameters and frequency estimates, calculating the first phase error estimate so that the first power follows the second power in the first frequency domain, calculating the second phase error estimate different from the first frequency domain in a second frequency domain, controlling the frequency estimates so that the first phase error estimate or the second phase error estimate follows the command value of the phase error estimate.

IPC Classes  ?

• H02P 21/24 - Vector control not involving the use of rotor position or rotor speed sensors
• H02P 21/18 - Estimation of position or speed
• H02P 27/06 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters

Abstract

A compressor includes: a housing; a compressor body to compress gas; a motor to drive the compressor body; a control board to control the motor; and a tank to store the gas outputted from the compressor body, wherein the housing has: a machine chamber storing the compressor body and the motor; a B-chamber having piping to connect the compressor body with the tank; an A-chamber storing the tank; an A-partition separating the machine chamber from the A-chamber and B-chamber; and a B-partition between the A-chamber and the B-chamber, the A-chamber has an air intake port to introduce ambient air, the A-partition has an A-vent as a hole to communicate between the machine chamber and the A-chamber, and a suction port of the compressor body is located in vicinity to the A-vent.

IPC Classes  ?

• F04C 29/04 - HeatingCoolingHeat insulation
• F04B 41/02 - Pumping installations or systems specially adapted for elastic fluids having reservoirs
• F04C 18/02 - Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents

Abstract

A rotary electric machine (1000) including: a rotor (200); a stator (100) surrounding a periphery of the rotor (200); a first recessed portion (133) disposed in an inner circumferential surface of a back yoke (130) of the stator (100), and extending in an axial direction of the stator (100); and a tooth (120) having one end fitted in the first recessed portion (133), a clearance formed between the first recessed portion (133) and the one end of the tooth (120) fitted in the first recessed portion (133) being smaller in a circumferential direction of the stator (100) than in a radial direction of the stator (100).

IPC Classes  ?

• H02K 1/14 - Stator cores with salient poles
• H02K 1/18 - Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
• H02K 15/12 - Impregnating, moulding insulation, heating or drying of windings, stators, rotors or machines

Abstract

A power converter apparatus comprising: a power converter that outputs signal to the magnet motor to vary the output frequency, output voltage and output current of the magnet motor, a control unit controls the power converter, wherein the control unit calculating the gain of the magnetic flux component of the q-axis, which varies with the phase of the magnet motor, calculating the d-axis induced voltage command value based on a value of the induced voltage coefficient, frequency estimates or frequency command value, and the gain of the flux component of the q-axis.

IPC Classes  ?

• H02P 21/26 - Rotor flux based control
• H02P 21/14 - Estimation or adaptation of machine parameters, e.g. flux, current or voltage
• H02P 21/22 - Current control, e.g. using a current control loop

Abstract

A method of updating the program of a gas compressor system is provided. The system has gas compressors, a controller that controls the gas compressors by a program, a discharge piping system coupled with each of the gas compressors, and a control terminal that controls the controller of the gas compressors. Gas discharged from the discharge piping system is controlled by the controller by at least one of a predetermined pressure value and flow rate of the gas value, including obtaining a program update, updating the program for a first gas compressor in operation that is a target of the program update among the gas compressors, and operating at least one of a second or a third gas compressor of the gas compressors based on the predetermined pressure value and the predetermined flow rate of the gas value.

IPC Classes  ?

• F04B 49/06 - Control using electricity
• F04B 41/06 - Combinations of two or more pumps
• G06F 8/65 - Updates
• F04C 28/00 - Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
• F04C 28/02 - Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids specially adapted for several pumps connected in series or in parallel
• F04D 25/16 - Combinations of two or more pumps

Abstract

A electric motor control device comprising a converter section converting AC voltage to DC voltage, an inverter section converting DC voltage from the converter section to AC voltage and supplying said AC voltage to electric motor, an inverter control unit controlling said inverter section, a current detection unit detecting the current flowing in said electric motors and a power calculation unit estimating the temperature of said electric motors from said detected current, calculating the resistance of said electric motors from said estimated temperature, and calculating the copper loss from said calculated resistance.

IPC Classes  ?

• H02P 21/14 - Estimation or adaptation of machine parameters, e.g. flux, current or voltage
• H02P 25/022 - Synchronous motors
• H02P 27/06 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters

Abstract

A motor-controller device includes a position control system that controls the position of a machine end connected to the motor. The motor-controller device receives a first speed directive from a high-level controller, stored in the position control system to output a motor axis position response to the high-level controller, including speed controller and vibration controller in speed control system. The vibration controller includes a position-command estimator that calculates an estimate of the location directive based on the first speed directive and the motor axis position response, a parallel vibration damping controller that extracts frequency components that excite vibration of the machine end included in the first speed directive based on the estimated value of the location directive, and outputs the extracted frequency components.

IPC Classes  ?

• H02P 23/04 - Arrangements or methods for the control of AC motors characterised by a control method other than vector control specially adapted for damping motor oscillations, e.g. for reducing hunting
• H02P 23/14 - Estimation or adaptation of motor parameters, e.g. rotor time constant, flux, speed, current or voltage
• H02P 23/18 - Controlling the angular speed together with angular position or phase

Abstract

A screw compressor for compressing a working medium sucked through a suction opening and discharging the compressed working medium through a delivery opening, wherein the screw compressor includes: a male rotor and a female rotor that rotate while meshing with each other; a casing that houses the male rotor and the female rotor and is provided with a bore which forms a working chamber designed, together with the male rotor and the female rotor, to compress the working medium; a drive unit that rotationally drives at least one of the male rotor and the female rotor; a working chamber closing unit that forms a suction port for sucking the working medium into the working chamber and closes the working chamber when the working chamber reaches a specified capacity; and a suction space that connects the suction opening and the suction port to allow communication therebetween.

IPC Classes  ?

• F04C 29/12 - Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
• F04C 18/08 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
• F04C 18/16 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
• F04C 29/00 - Component parts, details, or accessories, of pumps or pumping installations specially adapted for elastic fluids, not provided for in groups
• F25B 1/047 - Compression machines, plants or systems with non-reversible cycle with compressor of rotary type of screw type

Abstract

A motor control device that supplies electric power to a motor is disclosed. The motor control device is provided with a storage unit to store position offset data and information of a machine origin position of the motor. The motor control device generates a command value of a position after offset by using an externally input position command and the position offset data and coverts electric power to be supplied to the motor based on the command value of a position after offset and position information that is input from an encoder. The position offset data is data in which offset positions and offset quantities have been recorded in a mapping relation. A start position of the offset positions differs from the machine origin position.

IPC Classes  ?

• G05B 19/404 - 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 control arrangements for compensation, e.g. for backlash, overshoot, tool offset, tool wear, temperature, machine construction errors, load, inertia

Abstract

Rotating electrical machine comprising: a housing storing a stator and a rotor, a fan cover covers the housing from the outside, an end bracket attached to the axial end face of the housing, a cooling fan installed in the fan cover, wherein output shaft side end face of the fan cover has a convex portion extending in the axial direction, the end bracket on the output shaft side has a concave first exhaust opening part relative to the convex part of the fan cover, the end bracket on the anti-output shaft side has a second exhaust opening part on the opposite side of the first exhaust opening part.

IPC Classes  ?

• H02K 9/06 - Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
• H02K 5/20 - Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
• H02K 7/00 - Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines

Abstract

A casing of a screw compressor has a delivery inner wall face facing delivery end faces of a male rotor and a female rotor. The delivery inner wall face of the casing has a shield area that shields at least a part of a track of an axial fluid communication path, which is a clearance that periodically occurs at the delivery end faces according to variation of intermeshing of the male and female rotors upon rotation thereof and is bounded by trailing flanks of the male and female rotors. The shield area of the casing is provided with a groove group made up of a plurality of grooves having longitudinal directions. The grooves of the groove group are juxtaposed in the circumferential direction of at least one rotor of the male and female rotors and are arranged such that their sides extending in the longitudinal directions are disposed adjacent to each other. Each groove of the groove group is configured such that its longitudinal direction oriented from the inner circumferential side of the one rotor toward the outer circumferential side is inclined with respect to the radial direction of the one rotor in the same direction as the rotational direction of the one rotor.

IPC Classes  ?

• F04C 18/16 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
• F04C 2/16 - Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
• F04C 27/00 - Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids

Abstract

A novel inkjet recording device that allows occurrence of scattering to be suppressed without limiting the size of a printed character (font size) is provided. The novel inkjet recording device is so configured that a deflection positive electrode, a deflection negative electrode, or both the deflection positive electrode and the deflection negative electrode constituting a print head can be moved along a direction of ejection of ink droplets in correspondence with the size of a printed character.

IPC Classes  ?

• B41J 2/09 - Deflection means
• B41J 2/085 - Charge means, e.g. electrodes
• B41J 2/185 - Ink-collectorsInk-catchers

Abstract

This information processing device for executing applications holds, for each of the applications, a manifest file (user interface definition file) in which a user interface for the application is defined. The manifest file is designated with an attribute of data type for each item for defining a user interface object through which a setting item of the application is inputted/outputted. The information processing device generates the user interface object at which setting of the application is performed on the basis of the manifest file. Accordingly, for each of the applications, the user interface regarding setting of the application is unified, operability of a user is improved, and development efficiency of an application developer is improved.

IPC Classes  ?

• G06F 9/451 - Execution arrangements for user interfaces
• G06F 8/38 - Creation or generation of source code for implementing user interfaces

Abstract

A gas compression system that can continue control of the number of operated pieces of a compressor even when an abnormality has occurred and a control method thereof are provided. The gas compression system includes compressors, a number-of-pieces controller that executes master control to control the number of operated pieces of the compressor, and a communication network that connects the compressors and the number-of-pieces controller with each other in a mutually communicable manner. Each compressor includes a compressor main unit that compresses a gas and a controller that executes slave control to control the compressor main unit in response to a command from the number-of-pieces controller. The respective controllers are configured to determine whether an abnormality of the number-of-pieces controller or an abnormality of communication with the number-of-pieces controller has occurred on the basis of whether a safety notification from the number-of-pieces controller is received and transmit a master declaration.

IPC Classes  ?

• F04B 49/06 - Control using electricity
• F04B 41/02 - Pumping installations or systems specially adapted for elastic fluids having reservoirs
• G06F 11/07 - Responding to the occurrence of a fault, e.g. fault tolerance

Abstract

A laminar flow at a high air speed can be maintained, and contamination caused by operation of a device or operation of the device by a person can be suppressed as much as possible. There is provided a safety cabinet that supplies clean air into a work room from above, the cabinet including: an opening portion in a front surface of the work room; a front shutter; partition plates provided on right and left side surfaces and a back surface on an upper side of the work room; and a partition on a front upper side of the work room.

IPC Classes  ?

• F24F 3/163 - Clean air work stations, i.e. selected areas within a space to which filtered air is passed
• B01L 1/02 - Air-pressure chambersAir-locks therefor
• B01L 1/04 - Dust-free rooms or enclosures