86 results about "Power electronics circuits" patented technology

A thermal support may receive one or more power electronic circuits. The support may aid in removing heat from the circuits through fluid circulating through the support, which may be controlled in a closed-loop manner. Interfacing between circuits, circuit mounting structure, and the support provide for greatly enhanced cooling. The support may form a shield from both external EMI/RFI and from interference generated by operation of the power electronic circuits. Features may be provided to permit and enhance connection of the circuitry to external circuitry, such as improved terminal configurations. Modular units may be assembled that may be coupled to electronic circuitry via plug-in arrangements or through interface with a backplane or similar mounting and interconnecting structures.

An electric vehicle drive includes a thermal support may receive one or more power electronic circuits. The support may aid in removing heat from the circuits through fluid circulating through the support, which may be controlled in a closed-loop manner. Interfacing between circuits, circuit mounting structure, and the support provide for greatly enhanced cooling. The support may form a shield from both external EMI/RFI and from interference generated by operation of the power electronic circuits. Features may be provided to permit and enhance connection of the circuitry to external circuitry, such as improved terminal configurations. Modular units may be assembled that may be coupled to electronic circuitry via plug-in arrangements or through interface with a backplane or similar mounting and interconnecting structures.

An electric vehicle drive includes a support may receive one or more power electronic circuits. The support may aid in removing heat from the circuits through fluid circulating through the support. The support, in conjunction with other packaging features may form a shield from both external EM/RFI and from interference generated by operation of the power electronic circuits. Features may be provided to permit and enhance connection of the circuitry to external circuitry, such as improved terminal configurations. Modular units may be assembled that may be coupled to electronic circuitry via plug-in arrangements or through interface with a backplane or similar mounting and interconnecting structures.

A terminal structure for vehicle drive power electronics circuits reduces the need for a DC bus and thereby the incidence of parasitic inductance. The structure is secured to a support that may receive one or more power electronic circuits. The support may aid in removing heat from the circuits through fluid circulating through the support. The support may form a shield from both external EMI/RFI and from interference generated by operation of the power electronic circuits. Features may be provided to permit and enhance connection of the circuitry to external circuitry, such as by direct contact between the terminal assembly and AC and DC circuit components. Modular units may be assembled that may be coupled to electronic circuitry via plug-in arrangements or through interface with a backplane or similar mounting and interconnecting structures.

The application discloses a multi-mode control method and device. The multi-mode control method comprises the following steps of: determining the current working mode of a controlled circuit; presetting multiple working modes for the controlled circuit, dividing operation areas in different working modes by adopting performance optimization of the controlled circuit as an objective, and determining the condition for switching among the different working modes according to boundary values of all the operation areas; determining the current operation state of the controlled circuit; judging whether the controlled circuit meets the condition for switching from the current working mode to another working mode according to the current operation state of the controlled circuit; and if so, controlling the controlled circuit to switch from the current working mode to another working mode so as to improve the adaptability of power electronic circuits to complex application occasions.

The invention discloses a power circuit component optimization method based on an orthogonal learning particle swarm, and belongs to the power electronic technology and the field of computational intelligence. An orthogonal learning particle swarm optimization with a mutation strategy is used for carrying out optimization on an optimal component design of a power electronic circuit. Firstly, a method of generating a new optimal learning object based on an orthogonal combination mode is designed, and is used for mining information of a historical optimal solution of a particle individual and information of a globally-optimal solution of a swarm in the orthogonal learning particle swarm optimization, and combining a learning object which can guide particles to develop in a better direction, secondly, a mutation operator which can improve diversity of the orthogonal learning particle swarm optimization is designed, and the defect that the orthogonal learning particle swarm optimization easily falls into local optimum is overcome. All components of the power electronic circuit serve as variables needing to be optimized and are coded into individuals of the orthogonal learning particle swarm optimization, optimization is carried out on values of the components of the power electronic circuit through specific optimization processes such as update of the speed, update of the location, mutation operation and update of the optimal learning object of the orthogonal learning particle swarm optimization, and the power circuit component optimization method based on the orthogonal learning particle swarm has important application value in the existing large-scale circuit design and optimization field.

A battery depassivation system includes a depassivation circuit, a battery connect/disconnect circuit, and a processor. The depassivation circuit is adapted to be electrically coupled in series with a battery. The depassivation circuit is also coupled to receive an ENABLE signal and is configured, upon receipt thereof, to draw current from the battery. The battery connect/disconnect circuit is adapted to be electrically coupled in series between the battery and one or more battery-powered electronic circuits. The battery connect/disconnect circuit is coupled to receive an ISOLATE signal and is configured, upon receipt thereof, to electrically disconnect the one or more battery-powered electronic circuits from the battery. The processor is adapted to couple to the battery and is configured, upon being coupled thereto, to determine if the battery needs depassivation and implement a depassivation routine if the battery is determined to need depassivation.

A power electronic circuit fault diagnosis method based on Extremely randomized trees (ET) and Stack Sparse auto-encoder (SSAE) algorithm includes the following. First, collect the fault signal and extract fault features. Then, reduce the dimensionality of fault features by calculating the importance value of all features using ET algorithm. A proportion of the features to be eliminated is determined, and a new feature set is obtained according the value of importance. Further extraction of fault features is carried by using SSAE algorithm, and hidden layer features of the last sparse auto-encoder are obtained as fault features after dimensionality reduction. Finally, the fault samples in a training set and a test set are input to the classifier for training to obtain a trained classifier. And mode identification, wherein the fault of the power electronic circuit is identified and located by the training classifier.

A electronic insect barrier is provided that includes individual units, powered by electrical current supplied through power cords or network connections to power electronic circuits contained in housings, shielded by circuit board covers, units having a base with a bed leg anchor, supporting and stabilizing a bed leg away from electrical conductors separated by insulators, a means for killing insects particularly bedbugs who enter the housing through crawl holes and an opening, said bugs coming in contact with conductors as they egress a bed.

The invention relates to a method and to a charging circuit (800) for flexible bootstrapping in power electronics circuits, comprising a blocking diode (112), at least one bootstrap transistor (804), at least one resistor (812, 822) and at least one electrical component (802), which is designed to conduct a current flow when a predetermined potential difference is exceeded. An energy storage device (102) used for controlling a power semiconductor switch (100) and a source/emitter potential of the power semiconductor switch (100) are at the same potential, charging of the energy storage device (102) being effected as soon as the potential of a supply voltage (106) is above a potential of the energy storage device (102). Overcharging is prevented as soon as the predetermined potential difference in the electrical component (802) is exceeded, and discharging of the energy storage device (102) is prevented by the blocking diode (112).

The invention provides a power electronic circuit transient simulation GPU (Graphic Process Unit) acceleration method facing exponential integral. During the simulation process of a power electronic circuit in which the switch state is changed frequently, for an exponential integral algorithm, a Phi matrix is re-solved, thus consuming a lot of simulation time. The simulation acceleration strategysuggested by the power electronic circuit transient simulation GPU acceleration method facing exponential integral stores the calculated Phi matrix, and when encountering the same switch state, the Phi matrix is directly called so as to greatly save the calculating time of the Phi matrix. A linear interpolation considering multiple switch motions is improved, to enable the simulation step to be not changed, thus being more suitable for matrix storage. During the simulation process, for the electrical system, the GPU parallel calculation resource is utilized to perform solution with high efficiency while the control system and other complicated calculation parts are maintained on CPU for calculation. The power electronic circuit transient simulation GPU acceleration method facing exponential integral can effectively improve the simulation speed of the power electronic circuit, and provides a new thought for solving the new demand of the electrical energy system facing power electronization.

The invention provides an establishing method for a non-sectioned GaN HEMT model. The establishing method includes the steps that a voltage control current source I<DS>, gate-drain capacitance C<GD>, gate source capacitance C<GS> and drain-source capacitance C<DS> are obtained; the static characteristics of the non-sectioned GaN HEMT model are obtained according to the I<DS>, and a non-sectioned static-characteristic model is established according to the static characteristics; the dynamic characteristics of the non-sectioned GaN HEMT model are obtained according to the C<GD>, the C<GS> and the C<DS>, and a non-sectioned dynamic-characteristic model is established according to the dynamic characteristics; the non-sectioned GaN HEMT model is obtained according to the non-sectioned static-characteristic model and the non-sectioned dynamic-characteristic model. By means of the establishing method, the non-sectioned GaN HEMT model with the good convergence performance and the high accuracy can be obtained, and is further better applied to power electronic circuit simulation, and meanwhile designing and analysis of a following power converter are more convenient and efficient.

The invention discloses fabricating methods for a special power electronic circuit board for a power supply and a power module. The fabricating method of the special power electronic circuit board for the power supply is characterized by comprising the following step of fabricating a general power circuit electronic circuit board substrate, including the steps of fabricating a power copper wire with a tin rivet on the back side of the substrate and a power copper wire with a tinplating passing rivet hole on the front side of the substrate and combing the two copper wires. The fabricating method for the special power module comprises the steps of welding a commercially-sold power electronic element, a protective electronic element and partial control electronic elements on the special electronic circuit board and packaging the electronic elements with a heat-conducting insulated gum metal plate, wherein the power electronic element, the protective electronic element and the partial control electronic elements on a bearing metal plate with heat-conducting insulated gum on the special power electronic circuit board are fabricated by using an integrated circuit method, connected with the circuit board and packaged by using the heat-conducting insulated gum. The special power electronic circuit board has simple production and high practicability. The special power module has high integration level, high power and capability of being cooled and inserted on two surfaces.

EMI shielding in an electric vehicle drive is provided for power electronics circuits and the like via a direct-mount reference plane support and shielding structure. The thermal support may receive one or more power electronic circuits. The support may aid in removing heat from the circuits through fluid circulating through the support. The support forms a shield from both external EMI/RFI and from interference generated by operation of the power electronic circuits. Features may be provided to permit and enhance connection of the circuitry to external circuitry, such as improved terminal configurations. Modular units may be assembled that may be coupled to electronic circuitry via plug-in arrangements or through interface with a backplane or similar mounting and interconnecting structures.

The invention discloses a DC power supply active protection device for a substation based on fault location. The protection device is arranged between a DC bus and each DC feed-out branch. The protection device comprises a single-chip microcomputer control circuit and a power electronic circuit breaker and a fault detection circuit which are connected with the single-chip microcomputer control circuit. The output end of the DC bus is connected with the input end of the power electronic circuit breaker. The output end of the power electronic circuit breaker is connected with the corresponding DC feed-out branch. The control signal output end of the single-chip microcomputer control circuit is connected with the control signal input end of the power electronic circuit breaker. The fault detection circuit comprises a voltage and current sampling circuit and a grounding fault detection circuit. According to the DC power supply active protection device, the grounding and short circuit faultof the DC system in the substation can be discovered in time, the corresponding fault DC branch can be accurately located and the voltage outputted to the feed-out branch can be timely adjusted according to the fault so that the working continuity, reliability and safety of the DC power supply system of the substation can be improved.

The invention discloses a high-voltage direct-current circuit breaker comprising an alternating-current circuit breaker switch, a first power electronic circuit connected with the input end of the alternating-current circuit breaker switch at one end and used to convert direct current into alternating current, and a second power electronic circuit connected with the output end of the alternating-current circuit breaker switch at one end and used to convert alternating current into direct current, wherein the other end of the first power electronic circuit and the other end of the second power electronic circuit are connected to a direct-current transmission line. Through cooperation between the alternating-current circuit breaker switch and the power electronic circuits, direct current is converted into alternating current first, and then, alternating current is converted into direct current after arc extinguishing. Thus, direct-current arc extinguishing has the advantages achieved by alternating-current arc extinguishing, and the problem of long action time is avoided.

The invention discloses an anti-reflux dual-power-supply driving circuit applicable to a SiC BJT (Bipolar Junction Transistor) and a control method thereof, and belongs to the technical field of power electronic circuits. The driving circuit comprises a high-voltage quick switching branch and a low-voltage driving circuit. The control method of the driving circuit comprises the steps that a high-voltage power supply is adopted to supply power when the transistor is conducted so as to provide relatively high pulse current and accelerate the conduction process; a low-voltage power supply is adopted to supply power when the transistor is steadily conducted so as to provide small driving current; and a low-voltage power supply branch is kept to be open when the transistor is turned off, and the high-voltage quick switching branch is adopted to discharge. The driving circuit disclosed by the invention can eliminate a reflux phenomenon at a turn-off moment, the driving loss is reduced, and advantages of the dual-power-supply driving circuit are given into full play.