Abstract

A load modulation circuit applied to a power adapter, comprising a temperature sensing circuit, a rectification sensing circuit and a control circuit. The temperature sensing circuit is configured to obtain a temperature sensing voltage according to an internal temperature of the power adapter. The rectification sensing circuit is coupled to a transformer circuit of the power adapter to obtain a rectification sensing voltage. The control circuit is coupled to the transformer circuit, the temperature sensing circuit and the rectification sensing circuit, and is configured to determine whether the temperature sensing voltage exceeds a preset voltage range. When the temperature sensing voltage exceeds the preset voltage range, the control circuit is configured to generate an adjustment signal according to the rectification sensing voltage to adjust an output signal or an operating power of the power adapter.

IPC Classes  ?

• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• H02M 1/00 - Details of apparatus for conversion

Abstract

A whitelisting method for blocking script-based malware includes steps of: checking a command line of a process to confirm the process to launch a first interception point of a startup script file; checking whether the startup script file in a whitelist at the first interception point; determining that a test is passed when the startup script file exists in the whitelist, and launching the startup script file, wherein the startup script file at least includes a module script file; confirming the process to invoke a module loader to import and launch a second interception point of the module script file; checking whether the module loader is allowed to import the module script file, or is allowed to launch the module script file that has been imported by using the whitelist at the second interception point.

IPC Classes  ?

• G06F 21/51 - Monitoring users, programs or devices to maintain the integrity of platforms, e.g. of processors, firmware or operating systems at application loading time, e.g. accepting, rejecting, starting or inhibiting executable software based on integrity or source reliability
• G06F 21/54 - Monitoring users, programs or devices to maintain the integrity of platforms, e.g. of processors, firmware or operating systems during program execution, e.g. stack integrity, buffer overflow or preventing unwanted data erasure by adding security routines or objects to programs

Abstract

A thermal module includes a heat-absorbing component, a heat-dissipating component, a heat pipe, and a movable handle. The heat pipe connects the heat-absorbing component and the heat-dissipating component. The movable handle connects the heat-absorbing component and the heat-dissipating component and is located on the heat pipe. The movable handle includes two fixed seats and a handle body. The fixed seats are respectively fixed on the heat-absorbing component and the heat-dissipating component. Two ends of the handle body are respectively pivoted to the fixed seats to rotate between a flat position and an upright position. The handle body is parallel to the heat pipe when in the flat position. The handle body is perpendicular to the heat pipe when in the upright position. The movable handle prevents the heat pipe from bending excessively and deforming due to direct force through connecting to the heat-absorbing component and the heat-dissipating component.

IPC Classes  ?

• F28F 9/007 - Auxiliary supports for elements

Abstract

A closed-loop current sensor is provided. The under-test current conversion unit inputs an under-test current, and generates an analog signal and a voltage output signal. The first signal conversion unit converts the analog signal into a magnetic flux signal. The second signal conversion unit converts the voltage output signal into a digital voltage output signal. In an open-loop state, the control unit outputs a control signal with a first duty cycle, and controls the current value of the under-test current conversion unit. The voltage output signal is a first reading value, and the analog signal is the residual magnetism value of the under-test current conversion unit. In the open-loop state, the driving circuit generates an alternating current on the coil as well as generates positive and negative currents and magnetic fields with a decreasing peak value on the under-test current conversion unit for degaussing.

IPC Classes  ?

• G01R 19/25 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
• G01R 15/20 - Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices
• H02M 1/00 - Details of apparatus for conversion

Abstract

A charging device for charging a battery is provided, including a first housing, a channel, a fan, an electronic member, and a second housing. The first housing has an inner space. The channel passes through the first housing, and the wall of the channel separates the channel from the inner space. The fan is disposed in the channel. The electronic member is disposed in the inner space and is in contact with the wall of the channel. The second housing has an accommodating space. The accommodating space is configured to receive the battery and communicates with the channel.

IPC Classes  ?

• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating

Abstract

A planar transformer and a power supply device with the planar transformer are provided. The planar transformer includes a primary winding assembly, a secondary winding assembly and a magnetic core assembly. The primary winding assembly includes at least one primary winding unit. Each of the at least one primary winding unit includes a printed circuit board and a first conductive sheet. The first conductive sheet is embedded within the printed circuit board. The secondary winding assembly includes at least one secondary winding unit. The magnetic core assembly includes at least one magnetic core. In addition, at least a portion of the at least one primary winding unit and at least a portion of the at least one secondary winding unit are enclosed by the magnetic core assembly.

IPC Classes  ?

• H01F 27/28 - CoilsWindingsConductive connections
• H01F 27/24 - Magnetic cores
• H02M 7/00 - Conversion of AC power input into DC power outputConversion of DC power input into AC power output
• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating

Abstract

A coupling inductor and a power conversion module with the coupling inductor are provided. The coupling inductor includes a magnetic core and a winding assembly. The winding assembly includes a first power winding and a second power winding. A shared flux path is provided between the first power winding and the second power winding. Two opposite terminals of the first power winding are exposed on the bottom surface of the magnetic core. A portion of the first power winding is exposed on the top surface of the magnetic core and configured as a first heat dissipation part. Two opposite terminals of the second power winding are exposed on the bottom surface of the magnetic core. A portion of the second power winding is exposed on the top surface of the magnetic core and configured as a second heat dissipation part.

IPC Classes  ?

• H01F 27/29 - TerminalsTapping arrangements
• H01F 27/24 - Magnetic cores
• H02M 3/00 - Conversion of DC power input into DC power output
• H05K 1/18 - Printed circuits structurally associated with non-printed electric components
• H05K 7/14 - Mounting supporting structure in casing or on frame or rack

Abstract

The present disclosure provides a power converter including an input capacitor, an input switch, first and second bridge arms, first and second storage capacitors and an output capacitor. The first and second bridge arms are connected in parallel between a second terminal of the input switch and the ground terminal. The first bridge arm includes three switches connected in series and has first upper and lower nodes therebetween. The second bridge arm includes three switches connected in series and has second upper and lower nodes therebetween. The first storage capacitor is coupled between the first upper node and the second lower node. The second storage capacitor is coupled between the second upper node and the first lower node. The input switch is configured to block a rush current between the input capacitor and the first storage capacitor and/or the second storage capacitor.

IPC Classes  ?

• H02M 1/00 - Details of apparatus for conversion
• H02M 3/07 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode

Abstract

A wake-up circuit for an electric vehicle charger which includes a power path coupled to a power device and an electric vehicle, an auxiliary power circuit coupled to the power path, and a system controller. The wake-up circuit includes a switch, a controller and a connection end, and the switch is used to receive a trigger. When the electric vehicle charger is in a power outage state, the controller is enabled according to an energy storage voltage provided by an energy storage device coupled to the connection end. When the controller is in the power outage state, the controller notifies the electric vehicle to be set to a feed mode according to the trigger, so that the electric vehicle provides a vehicle power to the power path, and the auxiliary power circuit provides a first DC voltage to supply power to the system controller according to the vehicle power.

IPC Classes  ?

• B60L 55/00 - Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
• B60L 53/66 - Data transfer between charging stations and vehicles

Abstract

An electric vehicle charger is used to couple a power device and an electric vehicle by a power path, and a method for operating the electric vehicle charger includes steps of: entering a power outage state of the system controller of the electric vehicle charger when the power device when the power device power fails to supply a device power to the power path. According to a trigger, informing the electric vehicle to set a feed mode by a transistor that is turned on in the power outage state, so that the electric vehicle to provide a vehicle power to the power path. Causing the auxiliary power circuit to provide the first DC voltage to supply power to the system controller according to the vehicle power, thereby enabling the system controller and performing handshake communication with the electric vehicle.

IPC Classes  ?

• B60L 53/65 - Monitoring or controlling charging stations involving identification of vehicles or their battery types
• B60L 53/62 - Monitoring or controlling charging stations in response to charging parameters, e.g. current, voltage or electrical charge
• B60L 53/63 - Monitoring or controlling charging stations in response to network capacity
• B60L 53/66 - Data transfer between charging stations and vehicles
• B60L 55/00 - Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements

Abstract

This disclosure is directed to a flameproof electronic device having a housing, an electronic assembly, and a thermal-expandable structure. The housing has a pair of vents. The electronic assembly is accommodated in the housing, at least a part of the electronic assembly is spaced from the housing to enclose a flow channel between the electronic component and an internal surface of the housing, and the flow channel communicates with the vent. The thermal-expandable structure covers the internal surface of the housing or an external surface of the electronic assembly. The heat-expandable structure expands to block the flow channel when being heated to greater than or equal to a predetermined temperature.

IPC Classes  ?

• A62C 3/16 - Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
• H01M 50/383 - Flame arresting or ignition-preventing means

Abstract

This disclosure is directed to a flameproof electronic device having a housing, an electronic assembly, and a thermal-expandable structure. The housing has a pair of vents. The electronic assembly is accommodated in the housing, at least a part of the electronic assembly is spaced from the housing to enclose a flow channel between the electronic component and an internal surface of the housing, and the flow channel communicates with the vent. The thermal-expandable structure covers the internal surface of the housing or an external surface of the electronic assembly. The heat-expandable structure expands to block the flow channel when being heated to greater than or equal to a predetermined temperature.

IPC Classes  ?

• A62C 3/16 - Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
• H01M 50/383 - Flame arresting or ignition-preventing means

Abstract

The present disclosure provides a scalable power distribution system including a power distribution device. The power distribution device includes a plurality of input modules and a plurality of output modules. The input module includes a connector for receiving the input power. The output module has a plurality of output ports. The output module receives the input power from the connector of the corresponding input module, or receives the input power from the connector of the input module neighboring to the corresponding input module. The input module receives the plural types of input power, and the power distribution system selectively receives one or more times of the input power through one or more of the plurality of input modules to provide one or more times of the output power to one or more of the plurality of output ports.

IPC Classes  ?

• H02J 3/02 - Circuit arrangements for ac mains or ac distribution networks using a single network for simultaneous distribution of power at different frequenciesCircuit arrangements for ac mains or ac distribution networks using a single network for simultaneous distribution of ac power and of dc power
• H02J 1/00 - Circuit arrangements for dc mains or dc distribution networks
• H02J 4/00 - Circuit arrangements for mains or distribution networks not specified as ac or dc

Abstract

A power tool and a switch device thereof are disclosed. The switch device includes a housing, a slider, a magnetic component, a trigger and a control module. The magnetic component generates a magnetic field. The magnetic component is driven by the slider to move along a power-off path and a power-on path. The trigger is pressed by the slider. The control module includes a magnetic sensor generating a position signal according to a position of the magnetic component in the magnetic field. When the magnetic component is located on the power-off path, the control module is turned off. When the magnetic component is moved from the power-off path to the power-on path, the slider triggers the trigger to activate the control module. When the magnetic component is located on the power-on path, the control module outputs a control signal according to the position signal.

IPC Classes  ?

• B25F 5/02 - Construction of casings, bodies or handles
• H01H 36/00 - Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding

Abstract

A calibration method of an immersive projection system, the calibration method includes: setting a virtual projection position and a virtual image distortion correction of a projection device; setting a virtual photographing position of a camera device; simulating a projection region of the projection device; defining a plurality of first feature points in the projection region; simulating a virtual shooting image including the projection region and the first feature points of the camera device; adjusting the virtual projection position and the virtual image distortion correction of the projection device based on the first feature points; and outputting a simulated overview profile including the virtual projection position and the virtual image distortion correction both being adjusted. An immersive projection system is also disclosed.

IPC Classes  ?

• H04N 9/31 - Projection devices for colour picture display

Abstract

A power module for supplying power to an electrical device includes a first circuit board, a second circuit board, a third circuit board and a heat-conductive element. The first, second and third circuit boards are stacked in sequence, and the heat-conductive element is disposed between the first circuit board and the second circuit board. The heat-conductive element includes a first heat-conductive portion and a second heat-conductive portion. The first heat-conductive portion extends in a direction perpendicular to a plane of the second circuit board and is in contact with a heat-dissipating element on the first circuit board. The second heat-conductive portion extends in a direction parallel to the plane of the second circuit board and is contact with heat-generating components on the second circuit board. The first and the second heat-conductive portions are connected to each other.

IPC Classes  ?

• H01L 23/34 - Arrangements for cooling, heating, ventilating or temperature compensation
• H01L 23/00 - Details of semiconductor or other solid state devices

Abstract

A stacked circuit board assembly includes a first circuit board, a second circuit board alongside the first circuit board, and a third circuit board disposed between the first and second circuit boards. The first circuit board includes a first electrical contact, and the second circuit board includes a second electrical contact. The third circuit board includes a substrate, a third electrical contact, a fourth electrical contact and a conductive connection structure. The third and fourth electrical contacts are disposed on two opposite surfaces of the substrate, respectively, and are attached to the first and second electrical contacts, respectively. The conductive connection structure connects the third electrical contact to the fourth electrical contact.

IPC Classes  ?

• H05K 1/14 - Structural association of two or more printed circuits
• H02K 11/33 - Drive circuits, e.g. power electronics
• H05K 1/02 - Printed circuits Details
• H05K 1/11 - Printed elements for providing electric connections to or between printed circuits
• H05K 1/18 - Printed circuits structurally associated with non-printed electric components

Abstract

A method of controlling a full-bridge resonant converter includes steps of: operating a first upper switch in a first control action during a first time interval; operating a first lower switch in a second control action during the first time interval; operating a second upper switch in a third control action during the first time interval; operating a second lower switch in a fourth control action during the first time interval; operating the first upper switch in the fourth control action during a second time interval after the first time interval; operating the first lower switch in the third control action during the second time interval; operating the second upper switch in the second control action during the second time interval; operating the second lower switch in the first control action during the second time interval.

IPC Classes  ?

• H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
• H02M 1/00 - Details of apparatus for conversion
• H02M 3/00 - Conversion of DC power input into DC power output

Abstract

Provided is a method and system for file recovery based on multiple snapshots. During each time data are backing up for a snapshot, each backup file thereof is scanned to see if it is potentially damaged by ransomware, and if yes, marked as suspicious. For example, during subsequent backup processes, a first file list and a second file list with files that may be marked as suspicious files are generated. When there is a need to perform data recovery, file(s) marked as suspicious in the second file list is/are replaced with corresponding file(s) in the first file list that is/are not marked as suspicious, in order to generate a candidate file list. The file recovery is performed according to the candidate file list. This method prevents the files that are damaged by ransomware from being recovered to a target device and saves the time required for data recovery.

IPC Classes  ?

• G06F 11/14 - Error detection or correction of the data by redundancy in operation, e.g. by using different operation sequences leading to the same result

Abstract

A motor controller and cold plate assembly is disclosed and includes a cold plate, a PCB, a terminal base, a conductive component and a wiring terminal. The cold plate includes a first surface and a second surface opposite to each other, and a through hole. The though hole passes through the first surface and the second surface. The PCB includes a third surface and a fourth surface opposite to each other, and an opening. The fourth surface is attached to the first surface. The opening and the through hole are spatially aligned and communicated to each other. The terminal base is spatially corresponding to the opening and the through hole. The conductive component passes through the through hole, is spaced apart from the cold plate and engaged with the terminal base. The wiring terminal is connected to the conductive component, and extended along the second surface of the cold plate.

IPC Classes  ?

• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
• H02K 5/22 - Auxiliary parts of casings not covered by groups , e.g. shaped to form connection boxes or terminal boxes
• H02K 11/30 - Structural association with control circuits or drive circuits
• H05K 1/02 - Printed circuits Details

Abstract

A water-cooled stator structure of an axial flux motor includes a stator body, a cooling water pipe, an internal connection water channel structure, an external connection water channel structure, and thermoset insulation material. A plurality of conductor wires pass through the plurality of slots of the stator body in the radial direction to form a distributed winding. Cooling water pipes are made of waterproof non-magnetic material, and passed through the stator body in the radial direction, and are located between an internal space and an outer diameter sidewall of the stator body. The internal connection water channel structure and the external connection water channel structure are connected to both ends of the cooling water pipes. The thermoset insulation material is filled among inner and outer diameter protrusions of the conductor wires, the internal connection water channel structure and external connection water channel structure.

IPC Classes  ?

• H02K 1/20 - Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
• H02K 1/16 - Stator cores with slots for windings

Abstract

A non-transitory computer-readable storage medium storing one or more computer programs is disclosed. The one or more computer programs can be performed by one or more processors to perform: obtaining at least one key information based on an input content message and a predefined rule, and generating at least one task prompt according to the at least one key information; obtaining a format requirement information according to the predefined rule, and analyzing the input content message to obtain a semantic requirement information; retrieving at least one example data from a text example database according to the semantic requirement information, and processing the at least one example data according to the format requirement information to generate at least one task example; and synthesizing the input content message, the at least one task prompt and the at least one task example to generate a prompt message.

IPC Classes  ?

• G06F 40/40 - Processing or translation of natural language
• G06F 40/279 - Recognition of textual entities
• G06F 40/30 - Semantic analysis

Abstract

A DC-DC converter includes N upper switches, N lower switches, N pairs of flying capacitors and N subcircuits. The N lower switches are electrically connected between the N upper switches and the second terminal of the voltage source. A n-th pair of flying capacitors is coupled between a common node between the n-th and (n+1)-th upper switches and a common node between the n-th and (n+1)-th lower switches. A N-th pair of flying capacitors is coupled with the N-th upper switch and the N-th lower switch. A first subcircuit is coupled between a common node between the first upper switch and the first lower switch and a middle node of a first pair of flying capacitors. A i-th subcircuit is coupled between a middle node of a (i−1)-th pair of flying capacitors and a middle node of a i-th pair of flying capacitors.

IPC Classes  ?

• H02M 3/00 - Conversion of DC power input into DC power output
• H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

A three-phase single-stage power supply includes a positive output terminal, a negative output terminal, a first single-stage conversion module, a second single-stage conversion module, and a third single-stage conversion module. Output terminals of the first single-stage conversion module, the second single-stage conversion module and the third single-stage conversion module are connected in parallel between the positive output terminal and the negative output terminal. The third single-stage conversion module includes a third transformer, a third output rectifier circuit, a relay, an auxiliary inductor and an auxiliary capacitor. The third rectifier circuit includes a fifth switch circuit and a sixth switch circuit, which includes two switches connected in series, respectively, and the relay, the auxiliary inductor and the auxiliary capacitor are connected in series between a midpoint of the two switches in the sixth switch circuit and the negative output terminal, to be served as a buck/boost converter.

IPC Classes  ?

• H02M 7/797 - 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 using semiconductor devices only
• H02M 1/00 - Details of apparatus for conversion
• H02M 1/084 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters using a control circuit common to several phases of a multi-phase system
• H02M 1/14 - Arrangements for reducing ripples from DC input or output
• H02M 1/44 - Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
• H02M 7/81 - 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 arranged for operation in parallel

Abstract

A heat sink device is provided, including a heat sink main body and a gripping member assembly. The gripping member assembly has a pair of gripping members respectively disposed on opposite lateral walls of the heat sink main body. Each of the gripping members includes a gripping hole. When the gripping member assembly is in a first position relative to the heat sink main body, the gripping holes are situated at the lateral walls of the heat sink main body. When the gripping member assembly moves relative to the heat sink main body from the first position to a second position, the gripping holes are extended along a first direction and protrude from the lateral walls of the heat sink main body.

IPC Classes  ?

• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating

Abstract

An LED driver is couple to a first LED module and a second LED module, and the LED driver includes a first power conversion module, a switch, a second power conversion module, and a control module. The control module controls the switch to conduct so as to provide a second DC voltage and a third DC voltage outputted by the first power conversion module to the first LED module. The control module controls the switch not to conduct, and controls the second power conversion module to provide a fourth DC voltage, a fifth DC voltage, and a sixth DC voltage according to the second DC voltage for providing the fourth DC voltage, the fifth DC voltage, and the sixth DC voltage to the second LED module.

IPC Classes  ?

• H05B 45/3725 - Switched mode power supply [SMPS]

Abstract

An axial flux motor stator structure includes a soft magnetic material body and multiple conductor wires. The soft magnetic material body has multiple slots. The conductor wires pass through the slots to form windings. Each of the conductor wires includes multiple inner protrusions located in an internal space of the soft magnetic material body surrounding an axis. Each inner protrusion includes a central bending section and at least two consecutive bending sections. The central bending section and the at least two consecutive bending sections are bent in opposite directions. The at least two consecutive bending sections include a first bending section with a first curvature radius and a second bending section with a second curvature radius. The second bending section is farther from the central bending section than the first bending section, and the second curvature radius is greater than the first curvature radius.

IPC Classes  ?

• H02K 3/28 - Layout of windings or of connections between windings
• H02K 1/16 - Stator cores with slots for windings

Abstract

A power switching system includes a first power supply and a second power supply with three-phase AC power. The power switching system further includes a first power switch assembly, a second power switch assembly, and a three-phase transformer. The three-phase transformer includes a first winding, a second winding, and a third winding. The first winding, the second winding, and the third winding are connected in a delta structure to form three common nodes. A first common node is connected to a first switch and a fourth switch, a second common node is connected to a second switch and a fifth switch, and the third common node is connected to a third switch and a sixth switch.

IPC Classes  ?

• H02J 3/00 - Circuit arrangements for ac mains or ac distribution networks
• H02H 9/00 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
• H02J 3/18 - Arrangements for adjusting, eliminating or compensating reactive power in networks

Abstract

A DC power system and an insulation resistance monitor device thereof are provided. The DC power system includes positive, neutral and negative lines, a protective earthing terminal and a grounding resistor. The grounding resistor is electrically connected between the neutral line and the protective earthing terminal. The insulation resistance monitor device includes a first resistor, a first sensing resistor and a first detection circuit. The first resistor is coupled to the positive or negative line. The first sensing resistor is coupled between a second terminal of the first resistor and the protective earthing terminal. The first detection circuit is electrically connected to the first sensing resistor, and is configured to measure a sensing voltage across the first sensing resistor and detect whether an insulation resistance between the protective earthing terminal and any of the positive, neutral and negative lines is abnormal according to the sensing voltage.

IPC Classes  ?

• G01R 31/14 - Circuits therefor
• G01R 19/165 - Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values

Abstract

A bidirectional AC-DC power supply is provided. The bidirectional AC-DC power supply includes a plurality of primary circuits, a plurality of transformers, one secondary circuit and a control circuit. The plurality of primary circuits are electrically connected to a plurality of phase voltages of an AC power respectively. The plurality of transformers are electrically connected to the plurality of primary circuits respectively. A primary winding of each transformer is coupled to a corresponding one of the plurality of primary circuits, and a plurality of secondary windings of the plurality of transformers are electrically connected in series. The secondary circuit is electrically connected to the plurality of secondary windings of the plurality of transformers. The control circuit is configured to control switches of the plurality of primary circuits and the secondary circuit to switch under zero voltage by controlling phase shifts of the switches of the plurality of primary circuits.

IPC Classes  ?

• H02M 7/68 - Conversion of AC power input into DC power outputConversion of DC power input into AC power output with possibility of reversal by static converters
• H02M 1/00 - Details of apparatus for conversion
• H02M 1/12 - Arrangements for reducing harmonics from AC input or output
• H02M 1/42 - Circuits or arrangements for compensating for or adjusting power factor in converters or inverters

Abstract

A resonant converter is provided. The resonant converter includes a DC common mode choke and a resonant tank. The DC common mode choke includes two capacitive components. The resonant inductor group includes a first resonant inductor and a second resonant inductor. The first resonant inductor and the second resonant inductor are equal. Two sides of the resonant capacitor group are connected with the first resonant inductor and the second resonant inductor, respectively. The resonant capacitor group includes two resonant capacitors in series. A balancing condition is met when a first ratio between two inductances of the DC common mode choke and the first resonant inductor and a second ratio between capacitances of the two capacitive components are equal.

IPC Classes  ?

• H02M 1/44 - Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
• H02M 3/00 - Conversion of DC power input into DC power output
• H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

A dual-axis simultaneous motion system is disclosed and includes a first-axis sliding module, a second-axis sliding module, a transverse beam, a bearing, an encoder and a control unit. A first driver of the first-axis sliding module drives a first sliding block to slide. A second driver of the second-axis sliding module drives a second sliding block to slide. The transverse beam is connected to the first sliding block and the second sliding block. The bearing is pivotally connected between the transverse beam and the first or second sliding block. The encoder is configured to measure an angle of the transverse beam relative to the first or second sliding block. The control unit is connected to the first driver, the second driver and the encoder, and controls the first and second driver based on the encoder compensation, so that the first and second sliding blocks drive the transverse beam to slide.

IPC Classes  ?

• H02P 21/00 - Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
• H02K 11/215 - Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements

Abstract

A moving platform includes two sliding seats, two sliding blocks, a carrying member, and two weight blocks. The two sliding seats extend along a first axis and are arranged in a second axis. The two sliding blocks are respectively slidably disposed at two inner sides of the two sliding seats to move along the first axis. The carrying member is connected between the two sliding blocks. The two weight blocks are slidably disposed at two outer sides of the two sliding seats to move along the first axis. The two sliding blocks and the two weight blocks are configured to move in opposite directions along the first axis.

IPC Classes  ?

• B23Q 1/01 - Frames, beds, pillars or like membersArrangement of ways
• B23Q 1/62 - Movable or adjustable work or tool supports using particular mechanisms with sliding pairs only two sliding pairs only with perpendicular axes, e.g. cross-slides

Abstract

A cascaded converter includes four capacitors, four switches, a fifth switch and a first inductor, a sixth switch and a second inductor, and a seventh switch. The four capacitors include a first, a second, a third, and a fourth capacitor connected in series. The four switches include a first, a second, a third, and a fourth switch. The fifth switch and the first inductor are jointly connected at a sixth node, and the fifth switch is further connected to a first node and the first inductor is further connected to a fourth node. The sixth switch and the second inductor are jointly connected at a seventh node, and the sixth switch is further connected to a third node and the second inductor is further connected to a fifth node. The seventh switch is connected between the sixth node and the seventh node.

IPC Classes  ?

• H02M 1/00 - Details of apparatus for conversion

Abstract

A nozzle parameter measuring device is used for measuring a spraying width of a nozzle to be measured when the nozzle sprays a coating material and includes a connection part, a measuring kit, and a sensing part. The connection part is connected to the nozzle and the measuring kit. The measuring kit is a hollow cylinder with an inner wall. The nozzle sprays a coating material toward the inside of the measuring kit so that the coating material is coated on the inner wall of the measuring kit. The sensing part is connected to another side of the measuring kit relative to the connection part and has a light sensor disposed in the direction of the nozzle. The light sensor is configured for detecting a time when an emitted light being covered, and a spraying width of the nozzle is calculated.

IPC Classes  ?

• B05B 12/00 - Arrangements for controlling deliveryArrangements for controlling the spray area
• G01B 11/02 - Measuring arrangements characterised by the use of optical techniques for measuring length, width, or thickness

Abstract

A beam mechanism includes a beam member, a U-shaped member, a sliding member and a moving module. The beam member is made of a carbon fiber material and has a first side wall and a second side wall. The U-shaped member is disposed on the periphery of the beam member, and the U-shaped member extends to the second side wall of the beam member. The sliding member is located on the first side wall of the beam member and is connected to the U-shaped member. The moving module includes a slide rail and a lead screw. The slide rail is disposed on the first side wall of the beam member, and the lead screw is disposed on the second side wall of the beam member and is connected to the U-shaped member.

IPC Classes  ?

• B23Q 1/01 - Frames, beds, pillars or like membersArrangement of ways

Abstract

This disclosure is directed to an anti-moment machine and a moment resisting device thereof, device. The anti-moment machine has a machine body and at least one pair of moment resisting device. The moment resisting devices are respectively arranged on two sides of the machine body oppositely. Each moment resisting device has a base, a bracket, an elastic arm and a damper. elastic arm is respectively connected to one side of the base and a bottom of the bracket, and an obtuse angle is defined between the base and the bracket. The damper is connected between the base and the bracket. The machine body is applied preload moments and preload lateral forces from the moment resisting device respectively to balance the moment in the machine body and reduce vibrations of the machine body.

IPC Classes  ?

• F16F 15/02 - Suppression of vibrations of non-rotating, e.g. reciprocating, systemsSuppression of vibrations of rotating systems by use of members not moving with the rotating system
• B23Q 11/00 - Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling workSafety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools

Abstract

A stepped mesh-stacked powder-filling structure is disclosed and includes a cover plate, a first mesh plate, a second mesh plate and a wick structure. The first mesh plate is stacked on an inner surface of the cover plate along a first direction, and includes a first through opening. The second mesh plate is stacked on the first mesh plate along the first direction and includes a second through opening in communication with the inner surface through the first through opening. The second through opening is greater than the first through opening in view of the first direction, and a top surface of the first mesh plate not covered by the second mesh plate forms a first overlapping surface. The wick structure is disposed in the first and second through openings, and connected to the first mesh plate through the first overlapping surface.

IPC Classes  ?

• F28D 15/04 - Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls in which the medium condenses and evaporates, e.g. heat-pipes with tubes having a capillary structure

Abstract

A stator structure and a fan using the same are disclosure. The stator structure includes a base, plural stator magnetic poles, a circuit board, a first elastic element and a second elastic element. The base includes a front end and a rear end opposite to each other in an axial direction, and an outer peripheral wall connected therebetween. The plural stator magnetic poles are arranged on the base. The circuit board controls the plural stator magnetic poles. The first elastic element disposed on the outer peripheral wall includes a first head end, a first middle section and a first tail end connected and extended sequentially in a direction surrounding the axial direction. The second elastic element disposed on the outer peripheral wall and has a second head end, a second middle section and a second tail end connected and extended sequentially in a direction parallel to the axial direction.

IPC Classes  ?

• H02K 5/24 - CasingsEnclosuresSupports specially adapted for suppression or reduction of noise or vibrations
• F04D 25/06 - Units comprising pumps and their driving means the pump being electrically driven
• F04D 25/08 - Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
• F04D 29/32 - Rotors specially adapted for elastic fluids for axial-flow pumps
• H02K 1/14 - Stator cores with salient poles
• H02K 9/22 - Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
• H02K 11/33 - Drive circuits, e.g. power electronics
• H02K 21/22 - Synchronous motors having permanent magnetsSynchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos

Abstract

A fan device includes a motor set, an impeller, a frame, and a circuit board. The impeller is rotatably connected to one end of the motor set. The frame is disposed at another end of the motor set. The frame includes a wall portion. The wall portion surrounds to form an accommodating groove. The wall portion has a through hole. The circuit board is accommodated in the accommodating groove.

IPC Classes  ?

• F04D 25/06 - Units comprising pumps and their driving means the pump being electrically driven
• F04D 19/00 - Axial-flow pumps specially adapted for elastic fluids
• F04D 29/52 - CasingsConnections for working fluid for axial pumps

Abstract

A power supply device, system and method are used to provide backup DC power when the utility power is abnormal. The power supply device includes two selectors selectively electrically connected to an AC port or a DC port, a first end of each of two inductors electrically connected to one of the two selectors, a full-bridge circuit including two switch-series-connection portions, each switch-series-connection portion electrically connected to a second end of one of the two inductors, a voltage regulation module electrically connected between the second ends of the two inductors, and a controller configured to control the two selectors to electrically connect the two DC terminals and enable the voltage regulation module to form a conductive path between the two inductors according to an operation command instructing the utility power in an abnormal state. Thus, the number of components used in a circuit is effectively reduced.

IPC Classes  ?

• H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over
• H02M 1/10 - Arrangements incorporating converting means for enabling loads to be operated at will from different kinds of power supplies, e.g. from AC or DC
• H02M 1/14 - Arrangements for reducing ripples from DC input or output
• H02M 1/42 - Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
• H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
• H02M 7/219 - Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration

Abstract

A modular stacked magnetic component is provided. The modular stacked magnetic component is for a DC-DC converter with N phases, and N is an odd number greater than 1. In the N phases, an nth phase is 360/N degrees leading an (n+1)th phase, n is a positive integer less than N, and an Nth phase is 360/N degrees leading a first phase. The modular stacked magnetic component includes N magnetic cores, a magnetic cover, and N windings. The N magnetic cores are stacked vertically in sequence. The magnetic cover is stacked on the top of the N magnetic cores. The N windings are connected to the N phases of the DC-DC converter respectively, and each winding is wound on winding columns of a corresponding magnetic core to form an integrated transformer and inductor. Any two adjacent windings have opposite current directions.

IPC Classes  ?

• H02M 1/00 - Details of apparatus for conversion
• H01F 27/26 - Fastening parts of the core togetherFastening or mounting the core on casing or support
• H02M 3/00 - Conversion of DC power input into DC power output
• H03F 3/14 - Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with semiconductor devices only with amplifying devices having more than three electrodes or more than two PN junctions

Abstract

An inspection method of a photonic integrated circuit, the inspection method includes steps of: generating a main laser light; splitting the main laser light into a detection laser light and a reference laser light; splitting the reference laser light into a first laser light and a second laser light; splitting the first laser light into a first sub-laser light and a second sub-laser light; modulating a frequency of the first sub-laser light; coupling the first sub-laser light being modulated and the second sub-laser light to generate a first coupling light; inspecting an interference spectrum of the first coupling light; and adjusting a power or a linewidth of the main laser light according to the interference spectrum. The disclosure also discloses a photonic integrated circuit.

IPC Classes  ?

• G01S 7/497 - Means for monitoring or calibrating
• G01S 7/481 - Constructional features, e.g. arrangements of optical elements
• G01S 7/4911 - Transmitters
• G01S 17/89 - Lidar systems, specially adapted for specific applications for mapping or imaging

Abstract

An antenna module is provided. The antenna module is adapted to transmit a wireless signal. The antenna module includes a first dielectric layer, a ground layer, a first radiator, a feed conductor, a second dielectric layer, a second radiator and a third dielectric layer. The first dielectric layer includes a first surface and a second surface. The ground layer is disposed on the first surface. The first radiator is disposed on the second surface. The feed conductor is coupled to the first radiator. The second dielectric layer includes a third surface and a fourth surface, wherein the second dielectric layer covers the first radiator, and the third surface contacts the first radiator and the second surface. The second radiator is disposed on the fourth surface. The third dielectric layer is disposed on the fourth surface and covers the second radiator.

IPC Classes  ?

• H01Q 9/04 - Resonant antennas

Abstract

A power supply is provided. The power supply includes a conversion circuit, an auxiliary power supply circuit, a detection circuit and a control circuit. The conversion circuit generates an output voltage according to an input voltage to power a load. The auxiliary power supply circuit generates an auxiliary voltage according to the input voltage. The control circuit estimates an output power of the power supply. The output power includes a load output power of the conversion circuit and an auxiliary output power of the auxiliary power supply circuit. When at least one of the input voltage, the output power and the environment temperature increases, the control circuit configures the conversion circuit to increase the output voltage correspondingly. When at least one of the input voltage, the output power and the environment temperature decreases, the control circuit configures the conversion circuit to decrease the output voltage correspondingly.

IPC Classes  ?

• H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
• H02M 1/00 - Details of apparatus for conversion
• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating

Abstract

A liquid cooling module and a heat dissipation assembly using the same are disclosed. The liquid cooling module includes a housing base with an inflow chamber, an outflow chamber, manifold chambers, a partition wall, first through holes, second through holes and a diversion structure. The inflow chamber and the outflow chamber are disposed on a first surface, and divided by the partition wall. The manifold chambers are disposed on a second surface. The first through holes and the second through holes are disposed adjacent to two opposite elongated sides, and arranged along a first direction. The manifold chambers are in communication with the inflow chamber through the first through holes, and in communication with the outflow chamber through to the second through holes. The diversion structure protruding toward the inflow chamber or the outflow chamber provides a diversion function to achieve a uniform flow rate of the parallel flow channels.

IPC Classes  ?

• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating

Abstract

An axial flux motor includes a rotor and a stator, and the stator is at least partially overlapped with the rotor in the axial direction. The stator includes a soft magnetic material body, a plurality of conductor wires, a housing, and a thermosetting insulating material. The soft magnetic material body has a plurality of slots. The conductor wires pass through the slots in a radial direction to form a plurality of windings. The housing surrounds the soft magnetic material body. The thermosetting insulating material is connected between the soft magnetic material body and the housing, and filled into gaps of the conductor wires and the slots.

IPC Classes  ?

• H02K 3/47 - Air-gap windings, i.e. iron-free windings
• H02K 3/24 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors
• H02K 21/24 - Synchronous motors having permanent magnetsSynchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos

Abstract

A stator structure of an axial flux motor includes a plurality of conductors. The stator has a plurality of magnetic poles and a plurality of slots, and each slot includes a plurality of level-positions in an axial direction. The conductors are arranged through the level-positions of the slots to form windings. After each conductor passes through a lowest level-position, the conductor step to the next magnetic pole position, it climbs and passes through a next higher level-position until it climbs and passes through the highest level-position. The conductors include a first conductor and a second conductor, and the relative positions of the portions of the first conductor and the second conductor that protrude outside the stator at all the slots remain unchanged.

IPC Classes  ?

• H02K 3/47 - Air-gap windings, i.e. iron-free windings

Abstract

A motor structure includes a stator ring, a rotor, a wind blade set and a thermally-conductive casing. The stator ring has a rotor accommodation space located therein. The rotor is located in the rotor accommodation space. The wind blade set is arranged at one side of the rotor. The thermally-conductive casing encloses the stator ring, rotor and wind blade set. The thermally-conductive casing includes a thermally-conductive cover, and the thermally-conductive cover has a plurality of radially-inner holes and a plurality of radially-outer holes.

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 5/18 - Casings or enclosures characterised by the shape, form or construction thereof with ribs or fins for improving heat transfer
• H02K 5/20 - Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
• H02K 21/16 - Synchronous motors having permanent magnetsSynchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having annular armature cores with salient poles

Abstract

A power factor correction (PFC) converter includes an inductor to electrically connect to an alternating current (AC) source, a first set of switches to be electrically connected to a terminal of the inductor at one end and to a negative output terminal at an opposite end, and a second set of switches to be electrically connected to the terminal of the inductor at one end and to a positive output terminal at an opposite end. An output voltage of the PFC converter is between the positive output terminal and the negative output terminal. Two or more flying capacitors are connected between different pairs of adjacent ones of the first set of switches and corresponding adjacent ones of the second set of switches. A controller controls duty cycle of the first set of switches and the second set of switches based on balancing voltages of the two or more flying capacitors.

IPC Classes  ?

• H02M 1/42 - Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
• H02M 7/217 - Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

A motor control system includes a first STO circuit, a second STO circuit and a pulse control module. The first STO circuit includes a first filter circuit, a first STO switch, a first photocoupler circuit and a second photocoupler circuit. The first and second photocoupler circuits are connected in series. The first STO switch and the first filter circuit are connected with the first photocoupler circuit. The second STO circuit includes a second filter circuit, a second STO switch, a third photocoupler circuit and a fourth photocoupler circuit. The third and fourth photocoupler circuits are connected in series. The second STO switch and the second filter circuit are connected with the third photocoupler circuit. The pulse control module issues a pulse signal to the second and the fourth photocoupler circuits and detects whether the first or the second STO circuit is abnormal.

IPC Classes  ?

• 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

An inner gear wheel with impact absorption structure and a reducer using same are disclosed. The inner gear wheel includes a body wheel, fixing holes, an impact absorption structure and buffer elements. The body wheel includes an inner ring surface surrounding an axis and inner gears disposed around the inner ring surface. Fixing holes penetrate the body wheel along an axial direction. The impact absorption structure is disposed corresponding to one of the fixing holes, and includes buffer grooves and a connecting slit. The buffer grooves are disposed at two sides of the corresponding fixing hole along a circumferential direction. The connecting slit extends along the circumferential direction between the inner ring surface and the fixing hole and connects the pair of buffer grooves. The buffer elements are disposed in the buffer grooves to absorb stress transmitted from an outer gear plate engaged with the inner gear wheel.

IPC Classes  ?

• F16H 55/14 - Construction providing resilience or vibration-damping
• F16H 1/32 - Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear
• F16H 57/12 - Arrangements for adjusting or for taking-up backlash not provided for elsewhere
• F16H 55/17 - Toothed wheels
• F16H 57/00 - General details of gearing

Abstract

A power module assembly structure is disclosed and includes a substrate, a semiconductor element, a base, a plurality of heat dissipation fins and a tin layer. The substrate includes a first metal surface and a second metal surface spatially opposite to each other. The semiconductor element is disposed on the first metal surface. The base includes a first surface and a second surface spatially opposite to each other. The plurality of heat dissipation fins are disposed on the second surface of the base. The tin layer is disposed between the second metal surface and the first surface of the base, so that the first surface of the base is close to the second metal surface. The base further includes a protruding step disposed on the first surface of the base, and the protruding step has a center aligned with the semiconductor element.

IPC Classes  ?

• H01L 23/367 - Cooling facilitated by shape of device
• H01L 23/373 - Cooling facilitated by selection of materials for the device

Abstract

A movable charging-cable clamp is disclosed and includes a clamping component and a pivot component. The clamping component is configured to be fixed on an outer peripheral surface of a charging cable. The clamping component includes a first guide groove, which is recessed and disposed around an outer peripheral wall of the clamping component, and is centered at a central axis of the charging cable. The pivot component includes an annular structure and a hanging part. The annular structure is fitted onto the first guide groove and allows the clamping component and the charging cable to rotate relative to the pivot component around the central axis. The hanging portion is disposed adjacent to an outer periphery of the annular structure. The annular structure provides the charging cable with a degree of freedom of rotation in the axial direction, so as to achieve a middle support point of the charging cable.

IPC Classes  ?

• H02G 15/007 - Devices for relieving mechanical stress
• B60L 53/18 - Cables specially adapted for charging electric vehicles
• H02G 3/32 - Installations of cables or lines on walls, floors or ceilings using mounting clamps

Abstract

A power conversion system with voltage step change and voltage polarity conversion includes a three-phase AC-to-DC conversion circuit, a plurality of DC-to-DC conversion circuits, a voltage step change circuit, and a voltage polarity conversion circuit. The voltage step change circuit receives a DC voltage, a first voltage, and a second voltage, and adds the first voltage to the DC voltage or subtracts the second voltage from the DC voltage so as to provide a step-changed DC voltage. The voltage polarity conversion circuit receives the step-changed DC voltage and converts a polarity of the step-changed DC voltage to provide a DC output voltage.

IPC Classes  ?

• H02M 1/15 - Arrangements for reducing ripples from DC input or output using active elements
• H02M 1/00 - Details of apparatus for conversion
• H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
• H02M 7/217 - Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

A battery system includes a first battery module and a plurality of second battery modules coupled to the first battery module. The first battery module includes a battery management system, and a plurality of first battery cells electrically coupled to each other. The first battery cells are electrically coupled to the battery management system to be managed by the battery management system. Each of the second battery modules includes a plurality of second battery cells electrically coupled to each other. The second battery cells are coupled to the battery management system of the first battery module to be managed by the battery management system. The battery management system is coupled to an external system to transmit signals with the external system.

IPC Classes  ?

• H01M 50/258 - Modular batteriesCasings provided with means for assembling
• H01M 10/42 - Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
• H01M 50/269 - Mechanical means for varying the arrangement of batteries or cells for different uses, e.g. for changing the number of batteries or for switching between series and parallel wiring

Abstract

The embodiments of this application provide an image data collection system, an image model training method, and a device for improving image resolution. In this application, an image capturing device is used to capture images of an object at different focal lengths to obtain a first image and a second image respectively, and the first image and the second image are processed to obtain a first processed image with high resolution and a second processed image with low resolution, respectively. Image alignment is performed on these processed images to obtain a high-resolution and low-resolution image pair. Many high-resolution and low-resolution image pairs are collected as a training image dataset to train a model for upgrading low-resolution images to high-resolution images. The trained model can significantly improve the ability to restore image details.

IPC Classes  ?

• G06T 3/4053 - Scaling of whole images or parts thereof, e.g. expanding or contracting based on super-resolution, i.e. the output image resolution being higher than the sensor resolution
• G06T 5/10 - Image enhancement or restoration using non-spatial domain filtering
• G06T 5/20 - Image enhancement or restoration using local operators
• G06V 10/24 - Aligning, centring, orientation detection or correction of the image
• H04N 23/67 - Focus control based on electronic image sensor signals

Abstract

A power dispatch system and a power dispatch method are provided. When a time span of the historical electricity usage data is greater than or equal to a preset value, an upper bound is determine according to the historical electricity usage data, the expected power demand and a dispatchable power. When the time span is less than the preset value, the upper and lower bounds are determined according to the historical electricity usage data. When an actual power demand is greater than the upper bound, the power system receives an amount of power equal to the upper bound, and the energy storage unit discharges to supplement the power required by the power system. When the actual power demand is less than the lower bound, the power system receives an amount of power equal to the lower bound, and the energy storage unit receives the surplus power for charging.

IPC Classes  ?

• H02J 3/28 - Arrangements for balancing the load in a network by storage of energy
• H02J 3/06 - Controlling transfer of power between connected networksControlling sharing of load between connected networks
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers

Abstract

This disclosure is directed to a fan rotor having an annular disk and a plurality of vanes. The vanes and the annular disk are formed as one piece by etching, the vanes are configured in a radial arrangement on the annular disk, each of the vanes is defined with a thickness greater than or equal to 0.03 mm and less than or equal to 0.1 mm, a groove is defined between each vane and another vane adjacent thereto, and each groove is defined with a width equal to or larger than 0.2 mm.

IPC Classes  ?

• F04D 29/38 - Blades
• F04D 29/32 - Rotors specially adapted for elastic fluids for axial-flow pumps

Abstract

A method and system of software component identification in an embedded system firmware are disclosed. The method comprises: extracting the indicator files from a firmware file; extracting features from each indicator file, the features comprising: a hash value, semantic information, control flow graph information, and function-level feature information; comparing the features with a database, comprising a plurality of known software components, along with the features of each known indicator file within each known software component, to derive an indicator file identification result for each indicator file; and based on the indicator file identification results, determining a software component identification result of the firmware file.

IPC Classes  ?

• G06F 8/71 - Version control Configuration management

Abstract

A motor mechanism is provided. The motor mechanism includes a metal base, a clip member, a first silicon steel sheet, a second silicon steel sheet, and an insulation member. The metal base includes a protruding portion. The clip member is connected to the metal base. The first silicon steel sheet includes a first central hole and a plurality of first pole teeth. A positioning protrusion is formed on the inner surface of the first central hole and has a positioning hole. The protruding portion passes through the positioning hole. The second silicon steel sheet is stacked on the first silicon steel sheet, and includes a plurality of second pole teeth. The appearances of the first silicon steel sheet and the second silicon steel sheet are different. The insulation member is connected to the first and the second silicon steel sheets. The clip member clips on the insulation member.

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 5/22 - Auxiliary parts of casings not covered by groups , e.g. shaped to form connection boxes or terminal boxes
• H02K 5/24 - CasingsEnclosuresSupports specially adapted for suppression or reduction of noise or vibrations

Abstract

A resonant converter includes a first circuit board, a second circuit board, and a planar transformer. The planar transformer includes an iron core, a plurality of wirings, and a first conductive column. A first core column of the iron core penetrates through a first circuit board through hole of the first circuit board and a second circuit board through hole of the second circuit board respectively. The wirings are formed around the first circuit board through hole and the second circuit board through hole respectively, and the first conductive column electrically connects the wirings to form a winding of the planar transformer. A first via is used to electrically connect the winding and the power component embedded in any one sub-layer board of the first circuit board or the second circuit board, and the iron core is used to sleeve the winding to form the planar transformer.

IPC Classes  ?

• H02M 3/00 - Conversion of DC power input into DC power output
• H01F 27/24 - Magnetic cores
• H01F 27/28 - CoilsWindingsConductive connections
• H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
• H05K 1/11 - Printed elements for providing electric connections to or between printed circuits
• H05K 1/14 - Structural association of two or more printed circuits
• H05K 1/18 - Printed circuits structurally associated with non-printed electric components

Abstract

A liquid cooling device includes a bottom plate, a cooling fin assembly and a base. The cooling fin assembly is disposed on the bottom plate and includes a plurality of first cooling fins, a plurality of second cooling fins, and a third cooling fin. The third cooling fin is disposed between the first cooling fins and the second cooling fins, and has a first lateral side and a second lateral side, the first lateral side faces the first cooling fins, the second lateral side faces the second cooling fins. The base covers on the cooling fin assembly and the bottom plate and has an inlet and an outlet. The inlet faces a first top of the first cooling fins, and the outlet faces a second top of the second cooling fins.

IPC Classes  ?

• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
• F28F 13/06 - Arrangements for modifying heat transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media

Abstract

A current busbar system is provided. The current busbar system includes a current busbar and a fluid dispenser. The current busbar is configured to connect at least one electronic device, and includes a first electrode, a second electrode, a partition, a first fluid channel, and a second fluid channel. The partition is disposed between the first electrode and the second electrode. The first fluid channel is adjacent to the first electrode. The second fluid channel is adjacent to the second electrode. The second fluid channel communicates with the first fluid channel. The fluid dispenser is connected to the first fluid channel.

IPC Classes  ?

• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
• H02G 5/10 - Cooling

Abstract

A power module using electrical insulation film to conduct heat is provided. The power module comprises an electrical insulation film, a heat sink, at least one base metal layer, at least one first semiconductor device, and a sealant. The electrical insulation film is made of an elastic material, and the electrical insulation film is formed on an upper surface of the heat sink. The base metal layer is formed on an upper surface of the electrical insulation film. The first semiconductor device is disposed on the base metal layer. The sealant is disposed on the heat sink. The electrical insulation film is placed on the heat sink for replacing the traditional ceramic substrate, thereby reducing the number of structural layers in the power module.

IPC Classes  ?

• H01L 23/367 - Cooling facilitated by shape of device
• H01L 23/00 - Details of semiconductor or other solid state devices
• H01L 23/31 - Encapsulation, e.g. encapsulating layers, coatings characterised by the arrangement
• H01L 23/538 - Arrangements for conducting electric current within the device in operation from one component to another the interconnection structure between a plurality of semiconductor chips being formed on, or in, insulating substrates

Abstract

A ventilation fan device includes a base, a fan module, and an air guide assembly. The base includes a cover and a shell. The cover includes a first inlet and a first outlet. The shell includes a second outlet. The cover is combined with the shell. The fan module is installed on the shell and includes a housing and a centrifugal fan. The housing includes a second inlet and an air duct communicating with the second inlet. The housing includes a wing-shaped part located in the air duct. The centrifugal fan is disposed in the housing. The air guide assembly includes a stepper motor and an air guide plate. The stepper motor is installed in the wing-shaped part. The air guide plate is disposed in the housing and is driven by the motor.

IPC Classes  ?

• F04D 29/58 - CoolingHeatingDiminishing heat transfer
• F04D 17/16 - Centrifugal pumps for displacing without appreciable compression
• F04D 29/46 - Fluid-guiding means, e.g. diffusers adjustable

Abstract

An immersion cooling tank is provided. The immersion cooling tank includes a casing and a piping assembly. The piping assembly includes a fluid entrance, an inflow branch pipe, and a flow inlet. The fluid entrance is provided on the casing. The inflow branch pipe is in fluid communication with the fluid entrance. The flow inlet is in fluid communication with the inflow branch pipe. The flow inlet protrudes from the top surface of the inflow branch pipe. Alternatively, the flow inlet is sunken relative to the top surface of the inflow branch pipe. The flow inlet includes a consistent cross-sectional-area portion and an inconsistent cross-sectional-area portion located above the consistent cross-sectional-area portion. The inconsistent cross-sectional-area portion includes a first cross-sectional area and a second cross-sectional area, the first cross-sectional area is above the second cross-sectional area, and the first cross-sectional area is less than the second cross-sectional area.

IPC Classes  ?

• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating

Abstract

An electronic device includes a housing, a fan module, a partition, two heat sources, and an air guide assembly. The housing has an internal space and an opening communicated with each other. The fan module is fixed to an outside of the housing and configured to generate an airflow toward the opening. The partition is disposed in the internal space. The partition divides the internal space into first and second sub-spaces, and is configured to branch the airflow into first and second sub-airflows to the first and second sub-spaces, respectively. The two heat sources are respectively disposed in the first and second sub-spaces. The air guide assembly is disposed at the opening and includes a plurality of air guide blades. The air guide blades are configured to rotate to adjust air volumes of the first and second sub-airflows.

IPC Classes  ?

• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating

Abstract

An immersion cooling tank is provided. The immersion cooling tank includes a casing and a piping assembly. The casing includes a positioning element defining the lowest installation surface of an electronic device. The piping assembly includes an inflow branch pipe and a plurality of flow inlets. The flow inlets correspond to the lowest installation surface of the electronic device. The flow inlets are provided on the inflow branch pipe. The size of each of the flow inlets is 1/4.5 to 1/6.5 of the size of the inflow branch pipe.

IPC Classes  ?

• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating

Abstract

A battery charging method and a battery charging device are provided. The battery charging method includes: during a first time interval of a charging period, configuring a DC current generation circuit to generate a DC current, and charging a battery by a charging current including the DC current; and during a second time interval of the charging period, configuring a sinusoidal current generation circuit to generate a sinusoidal current, and charging the battery by the charging current including the DC current and the sinusoidal current. A minimum value of the charging current is equal to the DC current.

IPC Classes  ?

• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries

Abstract

An in-series fan frame assembly includes a first frame and a second frame. The bottom portion of the first frame has at least one extending structure including a first clasp. The second frame is located below the first frame and connected to the first frame in series. The top portion of the second frame has at least one sidewall engaged with the extending structure of the first frame. The sidewall includes a groove and a second clasp axially aligned with the groove. When the first frame is assembled to the second frame, the first clasp of the extending structure is guided by the groove of the second frame and then coupled with the second clasp of the second frame.

IPC Classes  ?

• F04D 29/52 - CasingsConnections for working fluid for axial pumps
• F04D 19/00 - Axial-flow pumps specially adapted for elastic fluids
• F04D 29/32 - Rotors specially adapted for elastic fluids for axial-flow pumps
• F04D 29/66 - Combating cavitation, whirls, noise, vibration, or the likeBalancing

Abstract

A method and a kit for detecting influenza A and B viruses provides a primer group that can simultaneously detect influenza A virus and influenza B virus, in which a first primer pair uses a specific genome fragment of influenza A virus as an amplification target, and a second primer pair uses a specific genome fragment of influenza B virus as an amplification target. The primer group can withstand at least 300 nanograms (ng) of human genomic DNA interference in reverse transcription polymerase chain reaction when detecting influenza A and B viruses, thereby making detection sensitivity less susceptible to interference from human genomic DNA in the sample.

IPC Classes  ?

• C12Q 1/70 - Measuring or testing processes involving enzymes, nucleic acids or microorganismsCompositions thereforProcesses of preparing such compositions involving virus or bacteriophage

Abstract

An electric tool is powered by a battery. An electric tool includes a motor, a charging and discharging control circuit and a motor control circuit. Charging and discharging control circuit is configured to couple to a power adapter. Charging and discharging control circuit includes a direct power supply path connected to the power adapter and battery, and is configured to detect an input current from power adapter and a first load current flowing to battery and to calculate an upper limit of a second load current that can be provided to motor according to a difference between the input current and the first load current. Motor control circuit is coupled between charging and discharging control circuit and motor, and is configured to control a speed or a torque of motor according to the upper limit of second load current.

IPC Classes  ?

• H02J 7/06 - Regulation of the charging current or voltage using discharge tubes or semiconductor devices
• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• H02P 23/14 - Estimation or adaptation of motor parameters, e.g. rotor time constant, flux, speed, current or voltage

Abstract

A power converter includes a front-stage conversion circuit and a rear-stage conversion circuit. The front-stage conversion circuit includes a buck circuit and an auxiliary circuit. The buck circuit includes a first inductor, a first switch and a first capacitor. A first terminal of the first inductor is electrically connected to an input positive terminal of the buck circuit through the first switch. A second inductor of the auxiliary circuit and the first inductor are negative coupling. The rear-stage conversion circuit includes a resonant capacitor, a first output inductor and a second output inductor. A dot-marked terminal of the first output inductor is connected with a non-dot terminal of the second output inductor and electrically connected with an output positive terminal of the power converter. The auxiliary circuit is electrically connected between an input negative terminal of the buck circuit and the resonant capacitor of the rear-stage conversion circuit.

IPC Classes  ?

• H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
• H02M 1/38 - Means for preventing simultaneous conduction of switches
• H02M 3/00 - Conversion of DC power input into DC power output

Abstract

A wireless management system and method are provided. The system synchronizes a first clock of a control substrate and a second clock of each of multiple energy storage units based on a first time calibration signal transmitted by the control substrate. The energy storage units measure energy storage devices of the energy storage units at a designated time point based on a measurement signal transmitted by the control substrate to obtain multiple measurement data, wherein the measurement signal is configured to indicate the designated time point. The control substrate obtains the measurement data corresponding to the designated time point from the energy storage units based on a reply signal transmitted by the energy storage units.

IPC Classes  ?

• H04W 56/00 - Synchronisation arrangements
• H04B 1/40 - Circuits

Abstract

A water pump housing structure is provided, including a first housing, a second housing, a third housing, a rotor, and a stator. The first housing has an inlet. The second housing, along with the first housing, forms a flow passage. The flow passage is in fluid communication with the inlet and serves as a passage for fluid. The third housing has an inner surface and an outer surface. The inner surface, along with the second housing, forms a stator chamber. A fin structure is formed on the inner surface. The fin structure protrudes from the inner surface toward the stator chamber. The rotor is located inside the flow passage. The stator is located inside the stator chamber and drives the rotor to rotate.

IPC Classes  ?

• F04D 29/58 - CoolingHeatingDiminishing heat transfer
• F04D 13/06 - Units comprising pumps and their driving means the pump being electrically driven

Abstract

A backup-based ransomware attack simulation method is disclosed and includes: generating a first file in a simulation device; when a first scheduled time is reached, automatically backing up for the first file to generate a first backup file; corrupting the content of the first file to generate a second file, wherein the second file is regarded as a file being attacked due to the corrupted content; when a second scheduled time is reached, automatically backing up the second file to generate a second backup file; sending an alert message as a result of the corrupted content of the second file; and, providing a restoring measure for the user of the computer to restore the content from the first backup file.

IPC Classes  ?

• G06F 21/57 - Certifying or maintaining trusted computer platforms, e.g. secure boots or power-downs, version controls, system software checks, secure updates or assessing vulnerabilities
• G06F 11/14 - Error detection or correction of the data by redundancy in operation, e.g. by using different operation sequences leading to the same result

Abstract

A safe connecting structure includes a first connector and a second connector removably connected to the first connector. The first connector includes a first outer housing, a first inner housing, a first conductive terminal, a first connecting bridge, and a conductive rod. The first inner housing has a first opening. The first conductive terminal is located in the first opening in the first inner housing. The first connecting bridge is accommodated in the first outer housing and rotatable in the first outer housing. The conductive rod passes through and fixed to the first connecting bridge, and the conductive rod protrudes outward first outer housing along a combining direction. The second connector includes a second outer housing and a second conductive terminal. The second outer housing is configured to be coupled to the first outer housing. The second conductive terminal is located in the second outer housing.

IPC Classes  ?

• H01R 13/625 - Casing or ring with bayonet engagement

Abstract

An optimization system for component retrieval and placement and a method therefor are provided. The optimization system processes multiple parameters inputted by a user through an optimization calculation module, and processes the calculated solutions through the optimization calculation module to output multiple final parameters. The optimization calculation module utilizes a genetic algorithm and integrates a precision-designed penalty mechanism, allowing the user to only provide specific constraints and retrieval components that need to be optimized, to ensure that the optimal machine layout as well as the retrieval and placement sequence are found under the given constraints.

IPC Classes  ?

• G16B 5/00 - ICT specially adapted for modelling or simulations in systems biology, e.g. gene-regulatory networks, protein interaction networks or metabolic networks

Abstract

A vapor chamber includes a first plate body, a second plate body, a capillary structure, and a first thin capillary layer. The second plate body is disposed below the first plate body. The first plate body and the second plate body form a closed cavity. The capillary structure is disposed within the closed cavity. The capillary structure includes at least one column and at least one strip. The at least one strip has an opposite first surface and a second surface. The first surface faces the first plate body or the second plate body, and the at least one strip has a plurality of first grooves that are recessed from the first surface toward the second surface. The first thin capillary layer is disposed between the second plate body and the capillary structure.

IPC Classes  ?

• F28D 15/04 - Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls in which the medium condenses and evaporates, e.g. heat-pipes with tubes having a capillary structure

Abstract

A resonant converter includes a first circuit board, a second circuit board and a planar transformer. The planar transformer includes an iron core, a plurality of wirings, and a first conductive column. A first core column of the iron core penetrates a first circuit board through hole of the first circuit board and a second circuit board through hole of the second circuit board respectively. The wirings are formed around the first circuit board through hole and the second circuit board through hole respectively, and the first conductive column electrically connects the wirings arranged around the first circuit board through hole and the wirings arranged around the second circuit board through hole to form a winding of the planar transformer. The iron core is used to sleeve the winding of the first circuit board and the second circuit board to form the planar transformer.

IPC Classes  ?

• H02M 3/00 - Conversion of DC power input into DC power output
• H01F 27/24 - Magnetic cores
• H01F 27/28 - CoilsWindingsConductive connections

Abstract

The present disclosure provides a totem-pole PFC converter and a control method thereof. The totem-pole PFC converter includes: a plurality of phase legs connected in parallel; a plurality of boost inductors, wherein each boost inductor is connected between the corresponding input terminal and the midpoint of the corresponding phase leg; a plurality of capacitors; a diode leg connected with the plurality of phase legs in parallel, wherein the midpoint of the diode leg is connected with the neutral terminal; an output filter connected with the diode leg in parallel; a T-type leg connected between the midpoint of the diode leg and the midpoint of the output filter and including two active switches connected in series; and a control system configured to turn the two active switches on around AC voltage zero crossings during non-unity power factor operation.

IPC Classes  ?

• H02M 7/25 - Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only arranged for operation in series, e.g. for multiplication of voltage
• B60L 53/22 - Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
• H02M 1/00 - Details of apparatus for conversion
• H02M 1/42 - Circuits or arrangements for compensating for or adjusting power factor in converters or inverters

Abstract

A rack-based power system is used to supply power to a server through a power busbar, and includes a power shelf and a power balancing device. The power shelf receives an input power and provides an output current to the power busbar so that the power busbar accordingly transmits a system current to supply power to the server. The power shelf generates a current command signal according to the output current, and transmits the current command signal to the power balancing device through a signal wire. When a rising rate of the current command signal exceeds a discharging current threshold, the power balancing device provides an adjustment current to the power busbar to supply power to the server together with the power shelf. When a falling rate of the current command signal exceeds a charging current threshold, the power balancing device receives the adjustment current from the power busbar.

IPC Classes  ?

• G06F 1/3234 - Power saving characterised by the action undertaken
• G06F 1/18 - Packaging or power distribution
• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries

Abstract

An interleaved flying capacitor multi-level converter includes a plurality of arms and a phase-shift PWM generation circuit. Each arm includes a flying capacitor multi-level circuit having an upper arm and a lower arm coupled at a middle node. The upper arm includes a plurality of serially coupled upper arm switches and the lower arm includes a plurality of serially coupled lower arm switches. One capacitor is correspondingly coupled between every two upper arm switches and every two lower arm switches. The phase-shift PWM generation circuit generates a plurality of switch control signals to respectively control the plurality of upper arm switches and the plurality of lower arm switches.

IPC Classes  ?

• H02M 1/00 - Details of apparatus for conversion
• H02M 1/14 - Arrangements for reducing ripples from DC input or output
• H02M 1/42 - Circuits or arrangements for compensating for or adjusting power factor in converters or inverters

Abstract

This disclosure is directed to a power bridging structure for racks and a power bus bar bridging device thereof, the power bus bar bridging device is used for bridging multiple power bus bars in different racks. The power bus bar bridging device has a bar housing, a plurality of power connectors and a plurality of conductive bridges. The power connectors are arranged in the bar housing. Each power connector has a joint. Each joint has a pair of claws and each joint is protruded from the bar housing. The conductive bridges are arranged in the bar housing, and each conductive bridge is connected to the power connectors. The power connectors are respectively used for connecting to one of the power bus bars.

IPC Classes  ?

• H01R 25/14 - Rails or bus-bars constructed so that the counterparts can be connected thereto at any point along their length
• H05K 7/14 - Mounting supporting structure in casing or on frame or rack

Abstract

A resonant converter includes a circuit board, a primary-side circuit, a secondary-side circuit and a planar transformer. The planar transformer includes a first through hole, an iron core, a plurality of vias, and a plurality of wirings. The planar transformer is electrically connected to the primary-side circuit and the secondary-side circuit. The first through hole penetrates through the circuit board, and the iron core includes a first core column penetrating through the first through hole. The vias are electrically connected to a first sub-layer board and a second sub-layer board of the circuit board, and the wirings are formed around the first through hole to be used as a winding of the planar transformer. The wirings interleavingly extend to the first sub-layer board and the second sub-layer board through the vias, and the wirings on the same layer are arranged in parallel.

IPC Classes  ?

• H01F 27/24 - Magnetic cores
• H01F 3/14 - ConstrictionsGaps, e.g. air-gaps
• H01F 27/28 - CoilsWindingsConductive connections
• H02M 3/00 - Conversion of DC power input into DC power output

Abstract

A resonant converter includes a circuit board, a primary-side circuit, a secondary-side circuit, and a planar transformer. The planar transformer includes a through hole, an iron core, a wiring, and a first via. The primary-side and the secondary-side circuits are disposed on the circuit board, and the primary-side or the secondary-side circuit includes a power component. The power component is embedded in any one of sub-layer boards of the circuit board, and the planar transformer is electrically connected to the primary-side and the secondary-side circuits. The through hole penetrates through the circuit board, and the iron core includes a core column penetrating through the through hole. The wring is formed around the through hole to be as a winding of the planar transformer. The first via is formed on the circuit board and is used to electrically connect the power component and the winding disposed on the sub-layer board.

IPC Classes  ?

• H02M 3/00 - Conversion of DC power input into DC power output
• H01F 27/28 - CoilsWindingsConductive connections

Abstract

The present disclosure provides a three-phase/single-phase compatible AC/DC converter and a control method. The three-phase/single-phase compatible AC/DC converter includes plural relays that, when selectively activated or deactivated, enables operation as a three-phase converter or a totem-pole PFC converter with a single-phase input, the totem-pole PFC converter having a parallel arrangement of a diode leg and a slow leg connected at their respective midpoints to neutral so as to operate in unity power factor or non-unity power factor. The method includes: operating plural fast legs at a first duty cycle for a period defined by a predefined range of an input voltage, and at least a second duty cycle outside of the period different than the first duty cycle for non-unity power factor cases; and increasing a switching frequency of the slow leg during the period while in non-unity power factor operation.

IPC Classes  ?

• H02M 7/25 - Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only arranged for operation in series, e.g. for multiplication of voltage
• B60L 53/22 - Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
• H02M 1/00 - Details of apparatus for conversion
• H02M 1/42 - Circuits or arrangements for compensating for or adjusting power factor in converters or inverters

Abstract

A centrifugal fan includes a frame and an impeller rotatably disposed in the frame. The frame has an air inlet and an air outlet. The impeller includes a plurality of blades and an upper ring. The upper ring is connected to the blades and is located between the blades and an upper cover of the frame. The upper cover has a first annular groove and a second annular groove. The first annular groove and the second annular groove are provided on an inner surface of the upper cover and are arranged around the air inlet. The upper ring has a first annular projection and a second annular projection. The first annular projection axially extends towards the first annular groove. The second annular projection extends towards the second annular groove and is bent away from the air inlet.

IPC Classes  ?

• F04D 29/28 - Rotors specially adapted for elastic fluids for centrifugal or helico-centrifugal pumps
• F04D 29/42 - CasingsConnections for working fluid for radial or helico-centrifugal pumps
• F04D 29/66 - Combating cavitation, whirls, noise, vibration, or the likeBalancing