16 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.

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.

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.

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.

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.

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.

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.

The invention relates to the technical field of power electronic circuits, and discloses a current source type high-frequency driving circuit and a driving method, and the driving method corresponds to the current source type high-frequency driving circuit. According to the invention, rapid switching of the power switch tube is realized to reduce switching loss, and grid energy dissipated in a traditional driver can be recovered to reduce driving loss; the boost function reduces the on-resistance of the power switch tube and reduces the conduction loss; due to the bipolar grid voltage, the phenomenon that a switching tube is switched on mistakenly due to crosstalk is reduced; under the working conditions of high frequency and small power, the driving negative voltage eliminates the current transfer phenomenon existing in the traditional current type driving to a certain extent; under a high-frequency and high-power working condition, the bidirectional switch thoroughly eliminates current transfer, the driving capability is further improved, and high-current rapid driving is realized; the calculation of the duty ratio suppresses the overshoot of the driving voltage in the dead time, and ensures the stable operation of the driving.

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.

1. Name of the product in this design: Semiconductor package (GaN-IC). 2. Application of this design: This design is used in power electronic circuits to realize power control and switching functions, and can be applied to equipment such as new energy vehicles and industrial frequency converters. 3. The key design feature of this product is its shape. 4. The picture or photo that best illustrates the key design points: Design 1 3D diagram 1. 5. Design 1 is designated as the basic design.