33 results about "Power electronics circuits" patented technology

A series-type hybrid circuit breaker to provide protection against short circuit faults in DC or AC power circuits. A series-type hybrid circuit breaker (SHCB) forces a fault current into a high-frequency AC current with zero crossings and allows a mechanical circuit breaker to disconnect the faulty branch. The SHCB injects a transient counter voltage pulse via a pulse transformer into the main power loop upon detection of an overcurrent condition and forces the fault current to change its original direction and cross zero to a negative peak value. A generation power electronic circuit on the primary side of the transformer controls the discharge of a capacitor to generate the counter voltage pulse during the first phase of each switching cycle of the fault interruption process. The power electronic circuit then changes the polarity of the injected secondary voltage and forces the fault current to change direction and cross zero again.

A series-type hybrid circuit breaker to provide protection against short circuit faults in DC or AC power circuits. A series-type hybrid circuit breaker (SHCB) forces a fault current into a high-frequency AC current with zero crossings and allows a mechanical circuit breaker to disconnect the faulty branch. The SHCB injects a transient counter voltage pulse via a pulse transformer into the main power loop upon detection of an overcurrent condition and forces the fault current to change its original direction and cross zero to a negative peak value. A generation power electronic circuit on the primary side of the transformer controls the discharge of a capacitor to generate the counter voltage pulse during the first phase of each switching cycle of the fault interruption process. The power electronic circuit then changes the polarity of the injected secondary voltage and forces the fault current to change direction and cross zero again.

A cascode solid-state switch device includes a normally-off transistor and a normally-on transistor having a source electrically connected to a drain of the normally-off transistor. A gate charge of the cascode solid-state switch device is independent of both a voltage class of the cascode solid-state switch device and a drain-to-source on-state resistance of the cascode solid-state switch device. A circuit component of the cascode solid-state switch device and a power electronics circuit that includes the cascode solid-state switch device are also described.

Method for manufacturing a circuit board (100, 220, 300, 400, 500, 600, 700) for power electronic circuits, where the circuit board (100, 220, 300, 400, 500, 600, 700) comprises at least two inlay layers, wherein each inlay layer has a metallic inlay (112, 122) whose thickness is in the millimeter range, wherein the spaces between the metallic inlay (112, 122) are filled with a non-conductive material (114, 124, 204, 714), wherein an intermediate layer (102, 718) with at least one metallization layer is arranged between at least two adjacent inlay layers, wherein the intermediate layer (102, 718) has a plurality of vias to an inlay layer covered by it, and wherein at least one recess (116, 126) is provided in at least one first inlay layer, which is designed to mount at least one electronic component (106, 502, 602, 704), namely at least one power electronic component, on a second inlay layer, wherein, in order to provide a screw point for the circuit board (100, 220, 300, 400, 500, 600, 700) in an inlay position, a part of a metallic inlay (112, 122) protrudes from the circuit board (100, 220, 300, 400, 500, 600, 700) by a distance.

This invention discloses an adaptive temperature control system for power electronic devices, relating to the field of temperature control. The system includes: a target power electronic circuit acquisition module for acquiring the target power electronic circuit; a predetermined characteristic index reading module for obtaining the characteristics; a predicted operating temperature acquisition module for obtaining a first predicted operating temperature; a target feedback coefficient acquisition module for obtaining the target feedback coefficient; a temperature correction module for correcting the temperature; a temperature control device group activation module for activating the temperature control device group; and a temperature control module for performing temperature control. This invention solves the technical problem in existing temperature control systems that lack intelligence and adaptive capabilities, failing to adjust the temperature setpoint in real time according to the actual operating conditions of the power electronic devices, resulting in poor temperature control performance. By automatically detecting and adjusting the temperature of the power electronic devices, and adjusting the temperature setpoint in real time according to the actual operating conditions of the devices, the system achieves precise temperature control.

An aircraft turbine engine (10) comprises: - a gas generator (12), - a fan (14), and - an electric machine (70), the stator (70b) of which is connected to a power electronics circuit (78) by at least one electrically conductive rod (80) extending substantially radially with respect to the axis within an IGV (52a) forming a component of a vane angular segment (G2), the rod (80) being configured to be disassembled and removed from the turbine engine by disassembling and removing the segment.

In an embodiment, a method includes: capturing a first image of a power module, the power module including a power electronics circuit, the power electronics circuit including power semiconductor dies; identifying positions of the power semiconductor dies in the first image with a die detection model; extracting second images of the power semiconductor dies from the first image according to the positions of the power semiconductor dies in the first image; and identifying defects of the power semiconductor dies in the second images with a defect detection model, the defect detection model being different from the die detection model.

The invention discloses a dual-mode electrosurgical high-frequency voltage inverter and a feed-forward predictive control method thereof, and belongs to the technical field of power electronic circuits. The voltage inverter comprises a first capacitor, a second capacitor, a first switch tube, a second switch tube, a third switch tube, a fourth switch tube, a blocking capacitor, a high-frequency boosting transformer and a multi-channel interleaved parallel structure. The channel interleaving parallel structure comprises an interleaving parallel structure first switch tube, an interleaving parallel structure second switch tube and an interleaving parallel structure first filter inductor; the invention discloses double working modes of an electrosurgical high-frequency voltage inverter, which not only widens the voltage gain, but also improves the efficiency of the inverter when the two working modes are switched. The invention further provides a feed-forward predictive control method, the duty ratio can be rapidly calculated through predictive control, the dynamic response speed is increased, and the control precision of the output power is improved through power feedback control.

Use of cryogenic fuel tanks for the cooling of power electronics circuits to improve cooling capabilities for power electronics in vehicles or an aircraft. The power electronics circuit can be cooled via a cryogenic cooling loop by the fuel directly, or the fuel is used to cool a separated coolant tank. A control valve controls the coolant flow within the cryogenic cooling loop based on an electrical property of the power switching element of the power electronics circuit and or based on the way the power switching elements are electrically connected together. The control valve can control the coolant flow such that a junction temperature is achieved which minimizes the drain-source resistance.

The application discloses a control method and system for realizing totem pole PFC high-frequency bridge arm staggered parallel and full-range soft switching, and mainly solves the problem that the prior art cannot simultaneously realize stable staggered parallel of totem pole PFC and active tube soft switching of master and slave phases. The implementation scheme comprises the following steps: collecting input voltage, output voltage, inductance current of master and slave phases and circuit parameters of a bridgeless totem pole PFC parallel circuit; calculating PI voltage loop output power and input voltage polarity signal; calculating active tube conduction time parameter, active tube turn-off time parameter, synchronous tube conduction time parameter and synchronous tube turn-off time parameter for realizing ZVS; calculating compensated slave phase active tube turn-off time parameter and synchronous tube conduction time parameter; and controlling active tube and synchronous tube of master and slave phases of the totem pole PFC based on the time parameters. The application can realize soft switching of all high-frequency active tubes while realizing stable staggered parallel of the totem pole PFC high-frequency bridge arm, and can be used for various high-power power electronic circuits.

The application discloses a fault diagnosis method based on Euler feature extraction and relates to the field of residual network, and comprises the following steps: step one: Euler feature extraction; the waveform diagram generated by EFE processing of original fault data can be directly used as the input of a Resnet50 network; step two: ResNet50 network training; the feature image processed by EFE is input into a Resnet50 network model, and the parameters thereof are trained; step three: fault diagnosis; the role of a ResNet50 classifier is played by Linear, which classifies fault types after training the network parameters in the previous training stage. Further, the ResNet50 network contains various important basic units in a CNN; meanwhile, the method can be applied to the fault diagnosis of power electronic circuits and rotating bearings. Euler feature extraction can enhance the spatial information of time series fault data, so that faults can be clearly distinguished.

A level shifter includes: a current pulse generation circuit coupled to a first supply rail and a first (ground) reference rail and configured to output non-overlapping first and second current pulses based on opposite edges of a logic input signal; a latch and a current mirror circuit coupled to a second supply rail and a second reference rail and configured to mirror the non-overlapping first and second current pulses such that the latch is set when the first current pulse is active and reset when the second current pulse is active, the second reference rail; and a voltage headroom circuit configured to mitigate voltage headroom loss between the second supply rail and the first reference rail, independent of an electric potential difference of the second reference rail. A power electronics circuit that includes the level shifter is also described.

A level shifter includes: a current pulse generation circuit coupled to a first supply rail and a first (ground) reference rail and configured to output non-overlapping first and second current pulses based on opposite edges of a logic input signal; a latch and a current mirror circuit coupled to a second supply rail and a second reference rail and configured to mirror the non-overlapping first and second current pulses such that the latch is set when the first current pulse is active and reset when the second current pulse is active, the second reference rail; and a voltage headroom circuit configured to mitigate voltage headroom loss between the second supply rail and the first reference rail, independent of an electric potential difference of the second reference rail. A power electronics circuit that includes the level shifter is also described.

A hybrid circuit breaker includes a primary trip / isolation relay component and a primary trip / isolation relay component driver coupled to the primary trip / isolation relay component and structured to interrupt current from flowing to the load in an event of fault; a sensing mechanism structured to sense at least current, voltage, and power flowing to the load; a metrology component coupled to the sensing mechanism and structured to monitor and measure at least the current, voltage and power; a controller structured to detect the event of fault based on data received from the sensing mechanism and the metrology component and communicate with a user device; and a hybrid secondary switching device coupled to the controller and the primary trip / isolation relay component, the hybrid secondary switch device including secondary contacts, a miniaturized electromechanical relay and a power electronics circuit connected in parallel with the miniaturized electromechanical relay.

The application discloses a control method and system for realizing bridgeless totem-pole PFC full-range ZVS and frequency limitation. The implementation scheme is as follows: input voltage, output voltage and inductor current of the bridgeless totem-pole PFC circuit are collected to obtain input voltage polarity signal and PI voltage loop output power; the additional reverse conduction time of the synchronous tube for realizing ZVS is calculated; the original active tube conduction time of the additional reverse conduction time of the synchronous tube without the synchronous tube and the additional reverse conduction time of the synchronous tube for realizing frequency limitation are calculated; the additional reverse conduction time of the synchronous tube and the active tube conduction time for simultaneously realizing ZVS and frequency limitation are calculated; the dead time is self-defined, and the active tube and the synchronous tube of the bridgeless totem-pole PFC circuit are controlled to act based on the time, the input voltage polarity signal, the additional reverse conduction time of the synchronous tube and the active tube conduction time for simultaneously realizing ZVS and frequency limitation and the inductor current zero-crossing signal. The application can realize high-frequency switch tube full-range ZVS and limit the frequency of the high-frequency tube switch, and can be used in various high-power power electronic circuits.

An art fault mitigator includes a sensor structured to detect at least one of a user within vicinity of the power system protection device, a light within the power system protection device and an overcurrent within the power system protection device; a mechanical switching device including a fast mechanical circuit interrupter and an actuator; a power electronics circuit coupled to the mechanical switching device in parallel and including a current commutator structured to commutate current from the fast mechanical circuit interrupter to the power electronics circuit upon turning OFF of the fast mechanical circuit interrupter, a power electronic circuit interrupter structured to allow the current to ride there-through up to a threshold current, and a current limiter structured to limit the current flowing through the power electronics circuit interrupter; and a controller including a trip control structured to control operations of the mechanical switching device and the power electronics circuit.

The present invention relates to a stationary inductive charging device (1) for an inductive vehicle charging system (5) for charging a vehicle battery, comprising an equipment housing (2) having a housing bottom (3) and a housing cover (4) spaced from the housing bottom (3), at least one coil (6) arranged in the equipment housing (2) for generating an alternating electromagnetic field, and power electronics (7) arranged in the equipment housing (2) for supplying energy to the coil (6) and for controlling the driving of the coil (6). In order to efficiently cool the components (10) of the power electronic circuit (7), an air cooling device (11) is provided, the air cooling device (11) having at least one air duct (12) extending into the equipment housing (2) for guiding air, at least one fan (13) arranged in the equipment housing (2) for driving air into the air duct (12), at least one air inlet (14) formed in the equipment housing (2) fluidly connecting the air duct (12) with the surroundings (16) of the inductive charging device (1), and at least one air outlet (15) formed in the equipment housing (2) fluidly connecting the air duct (12) with the surroundings (16). Efficient cooling of the components (10) is achieved because each air duct (12) has a duct wall (17) made of metal, the inner wall surface (18) of the duct wall (17) being exposed to air, and the air duct (12) has at least one heat exchanger area (20) in which the duct wall (17) is thermally coupled to at least one component (10) at its outer wall surface (19).

The application relates to the technical field of power electronic circuits, and discloses a high-frequency converter and a control method. The high-frequency converter comprises a DC-DC partial power processing circuit, a slope voltage circuit and a bias voltage circuit, the DC-DC partial power processing circuit, the slope voltage circuit and the bias voltage circuit are cascaded in sequence; wherein: the DC-DC partial power processing circuit is used for adjusting inputted partial power; the slope voltage circuit and the bias voltage circuit constitute a waveform synthesis circuit, which is used for synthesizing bias voltage and slope voltage waveforms to perform high-frequency conversion. The control method corresponds to the high-frequency converter. According to the application, the circuit can be effectively simplified, the number of power supplies and switching devices can be reduced, and the voltage stress of the switching devices can be reduced through the multiplexing mode of multiple switching devices.

An apparatus includes a printed circuit board (PCB), a power component disposed on the PCB, the power component to generate heat, and a multilayered coating disposed over the power component and at least a portion of the PCB to dissipate heat from the power component, the multilayered including: an electrical insulation layer comprising a non-polar compound and disposed on the power component and the at least a portion of the PCB; a chromium layer disposed on the electrical insulation layer; and a copper layer disposed on the chromium layer that is at least 10 microns (μm) thick, the copper layer conformally adhered to a top of the power component and to the PCB.

A power electronics arrangement for a motor vehicle comprises at least one power electronics circuit having at least one temporary storage for electrical energy, a discharge circuit associated with the power electronics circuit for discharging the temporary storage, having a discharge resistance, and a cooling device for cooling the power electronics arrangement, wherein the cooling device comprises a metallic cooling sink, the cooling sink being covered at least partly by an electrically insulating insulator layer, on which the discharge resistance is arranged as a conductor track.

A level shifter includes: a current pulse generation circuit coupled to a first supply rail and a first (ground) reference rail and configured to output non-overlapping first and second current pulses based on opposite edges of a logic input signal; a latch and a current mirror circuit coupled to a second supply rail and a second reference rail and configured to mirror the non-overlapping first and second current pulses such that the latch is set when the first current pulse is active and reset when the second current pulse is active; and a voltage headroom circuit configured to mitigate a voltage headroom loss between the second supply rail and the first reference rail independent of an electrical potential difference of the second reference rail.A power electronics circuit incorporating the level shifter is also described.

The invention relates to the technical field of power electronic circuits, and discloses a high-frequency converter and a control method, the high-frequency converter comprises a DC-DC part power processing circuit, a ramp voltage circuit and a bias voltage circuit, and the DC-DC part power processing circuit, the ramp voltage circuit and the bias voltage circuit are cascaded in sequence; wherein the DC-DC partial power processing circuit is used for adjusting input partial power; and the ramp voltage circuit and the bias voltage circuit form a waveform synthesis circuit which is used for performing waveform synthesis on the bias voltage and the ramp voltage so as to perform high-frequency conversion. The control method corresponds to the high-frequency converter. According to the invention, the circuit can be effectively simplified, the number of power supplies and switching devices is reduced, and the voltage stress of the switching devices is reduced through a multiplexing mode of multiple switching devices.

This application provides a high-voltage, high-current, resettable intelligent electronic fuse protection device and method, specifically relating to the field of power electronic circuit protection technology. The device includes input / output ports, a main power switch module, a current / voltage sampling module, a hardware comparison module, a fast drive module, a control module, and a buffer absorption module. The main power switch module consists of multiple power switch units connected in parallel, carrying and controlling the main power path. The current and voltage sampling modules sample current and voltage respectively and generate signals. The hardware comparison module compares the signals and outputs a fault trigger signal. The fast drive module receives the signal and shuts off the main power path. The control module monitors the device status, integrates a graded protection logic module, and executes recovery logic according to the fault level, achieving automatic recovery from recoverable overloads and sustained shutdown during lockout faults. The buffer absorption module provides overvoltage protection. This device meets the requirements of high-voltage, high-current scenarios, providing multiple hardware-level protections and replacing traditional fuses.

This invention discloses a gallium oxide (GaO) junction device, primarily addressing the limitations of β-Ga2O3-based devices and the lack of substrate-level bulk single crystals in α-Ga2O3-based devices, resulting in poor crystal quality. The device comprises a β-Ga2O3 substrate and an α-Ga2O3 epitaxial structure layer, with an auxiliary transfer layer and a liquid metal-based GaO nucleation layer between them. These layers are used for the transfer and epitaxial growth of α-Ga2O3, respectively, to form an α-Ga2O3-β-Ga2O3 junction structure. GaO diodes and vertical GaO transistors are fabricated on this junction structure according to requirements. This invention combines the ultra-high voltage withstand capability of α-Ga2O3 with the low-cost mass production potential of the β-Ga2O3 substrate, effectively improving the quality of the α-Ga2O3 epitaxial structure layer and providing a new technical path for performance and cost control of GaO-based power devices. It can be used in high-voltage, low-loss power electronic circuits.

A first C-shaped magnetic core and a second C-shaped magnetic core are symmetrically arranged up and down to form a square-shaped core body, a first coil assembly comprises a primary winding A and a secondary winding A, and a second coil assembly comprises a primary winding B and a secondary winding B; the primary winding A, the secondary winding A, the primary winding B and the secondary winding B are all formed by winding hollow electromagnetic wires, deionized water is injected into the hollow electromagnetic wires, the first coil assembly and the second coil assembly are arranged in corresponding insulating sleeves respectively, and the insulating sleeves are arranged on the corresponding sides of the square-shaped core body in a sleeving mode. Ester insulating liquid is arranged in the insulating sleeve; each of the first C-shaped magnetic core and the second C-shaped magnetic core consists of a plurality of groups of nanocrystalline strips with C-shaped structures side by side, and a separation paperboard is arranged between every two adjacent nanocrystalline strips with the C-shaped structures. The capacity of the high-frequency transformer can be improved to the MW level, and the high-frequency transformer can be applied to various high-frequency power electronic circuits.

An example system includes a component configured to generate a signal associated with a power electronics circuit. The system includes a hardware processor circuit coupled to the component, wherein the hardware processor circuit is configured to: measure, based on a configuration programmed by one or more programmable processor circuits, the signal over an amount of time to generate a first value, the configuration based on a model of the power electronics circuit; and based on a comparison between the first value and a second value satisfying at least one threshold, generate an interrupt associated with the power electronics circuit. Other examples are described.

A bidirectional electric vehicle (EV) charger of a vehicle-to-home charging system achieves bidirectional charging and discharging of EVs and a residential energy storage system (ESS) using unidirectional power electronics (UPE) circuitry to enable flexible power flow topologies. The bidirectional EV charger includes (i) the UPE adapted for connection between (ii) a pair of switch units (one at each input / output of the UPE), (iii) an intelligent controller, and (iv) a vehicle protocol decoder unit, as well as protection circuitry to provide safety for the conducted power through the charger. Each switch unit includes a plurality of switch elements connected respectively at each end of the UPE and to the intelligent controller, which controls the switch elements of the switch units and receives control commands wirelessly through, e.g., a mobile application executing on a mobile device.

In an embodiment, a method includes: capturing a first image of a power module, the power module including a power electronics circuit, the power electronics circuit including power semiconductor dies; identifying positions of the power semiconductor dies in the first image with a die detection model; extracting second images of the power semiconductor dies from the first image according to the positions of the power semiconductor dies in the first image; and identifying defects of the power semiconductor dies in the second images with a defect detection model, the defect detection model being different from the die detection model.

The invention relates to a computer-implemented method for determining an optimal topology for a power electronics circuit, in particular a voltage converter, an inverter, or a power driver, wherein the topology of the power electronics circuit can be represented by a network using a network list, the method having the steps of: - providing (S2) a plurality of topologies, each of which has a respective circuit network comprising active and passive components, the active components comprising semiconductor switches and / or diodes; - providing (S1) requests to the power electronics circuit, the requests specifying user-defined operating points (om m=1…M); - determining respectively optimized component values of the active and / or passive components for the plurality of topologies on the basis of a target function (F) which assesses the fulfillment of the requests, - determining (S10) a respective function value of a specified decision target function (V) for the plurality of topologies on the basis of the assigned optimized component values; and - selecting the topology from the plurality of topologies on the basis of the associated function value of the decision target function (V).

A power electronic circuit fault automatic diagnosis device disclosed by the present invention structurally comprises a detection main body, a control panel, a top cover and a detection port, the bottom of the detection main body is supported by supporting legs, the control panel is arranged at the top of the front end of the detection main body, the top cover is installed at the top of the detection main body, and the detection port is located in the middle of the front end of the detection main body. The detection main body comprises a feeding device, a driving motor, a transmission belt, a detection device and a data processing module, the feeding device is transversely installed in the middle of the interior of the detection main body, the feeding device is connected with the end face of the detection opening, and the driving motor is installed at the bottom end of the interior of the detection main body. The feeding device clamps the circuit board and conveys the circuit board to the bottom inwards, then the detection device moves downwards to make contact with the circuit board for fault detection, and the purpose of automatic fault detection is achieved.