Wireless power receiver circuits and methods for use in wireless power transfer systems are provided for providing a constant current or voltage, depending on which is needed, to an electrical load. The wireless power receiver circuits are configured to shut down the resonant responses of the receiver circuits when electrical power is not needed by the load to reduce power consumption and avoid unnecessary heat dissipation. Additionally, a switching device of the wireless power receiver circuit that is used for shutting down the resonant response can operate at relatively low frequencies, and consequently, can be implemented using relatively low-speed, relatively inexpensive components.

A power conversion device includes a first solid pattern provided on a multi-layer wiring substrate and connected to a positive side of a first power supply, a second solid pattern provided on the multi-layer wiring substrate and connected to a negative side of the first power supply, and a third solid pattern provided on the multi-layer wiring substrate and connected to a negative side of a second power supply that is insulated from the first power supply. The first solid pattern and the third solid pattern are arranged so as to at least partially overlap in a first direction of the multi-layer wiring substrate, and the second solid pattern and the third solid pattern are arranged so as to at least partially overlap in the first direction of the multi-layer wiring substrate.

An apparatus includes, on a top layer of a circuit board, a first and a second synchronous rectifier groups (SRGs) placed along first two opposite sides of a first phase of a transformer including three phases. A second and a fourth SRGs are placed along the first two opposite sides on a bottom layer of the circuit board. The first and second SRGs are connected between a first terminal of the first phase and a grounding terminal. The third and fourth SRGs are connected between a second terminal of the first phase and the grounding terminal. Two filter capacitor groups are placed along second two opposite sides of the first phase on the top layer. Another two filter capacitor groups are placed along the second two opposite sides on the bottom layer. The four filter capacitor groups are connected to a third terminal of the first phase.

A power circuit is provided that includes at least a first power supply unit and a second power supply unit. The first power supply unit includes a first input section, a first AC voltage generator, a first rectification-and-smoothing section, and a first isolation section that is provided between the first AC voltage generator and the first rectification-and-smoothing section. The second power supply unit includes a second input section, a second AC voltage generator, a second rectification-and-smoothing section, and a second isolation section that is provided between the second AC voltage generator and the second rectification-and-smoothing section. The power circuit is configured such that the second AC voltage generator generates an AC voltage having a phase obtained by inverting a phase of the AC voltage generated by the first AC voltage generator.

A power conversion device and a control circuit are provided. The power conversion device includes a power conversion circuit and a control circuit. The control circuit includes a first controller and a second controller. The power conversion circuit includes an input capacitor, a rectifier circuit, and a power switch. The input capacitor is coupled to an input terminal of the power conversion device. The rectifier circuit converts an input AC power into a rectified power. The first controller operates the power switch to cause the power conversion circuit to convert the rectified power into an output power. The second controller detects a signal waveform at the input terminal, and controls the first controller in response to the signal waveform at the input terminal, so as to utilize the power switch to discharge the charge stored in the input capacitor.

An electrical circuit for charging a DC voltage source from an AC voltage network. The circuit includes an input that is able to receive an AC voltage from the voltage network, and a first output able to be connected to the DC voltage source. An insulating stage formed using a plurality of capacitors is arranged so as to electrically insulate the input from the first output of the circuit. A frequency-raising stage is arranged between the input of the circuit and the insulating stage so that the capacitors of the insulating stage are in a circuit portion that has flowing through it an AC current at a frequency that is greater than that of the AC network.

A charging module and a charging device. The charging module includes a three-phase rectifier module, a bus capacitor module, an inductor, and a controller. An input end of the three-phase rectifier module is electrically connected to an input power supply, and an output end of the three-phase rectifier module is electrically connected to an input end of the bus capacitor module. The bus capacitor module includes a first bus capacitor and a second bus capacitor. The first bus capacitor is connected between a first output end of a three-phase bridge arm and a midpoint of the three-phase bridge arm, and the second bus capacitor is electrically connected between a second output end of the three-phase bridge arm and the midpoint. The inductor is electrically connected to the midpoint of the three-phase bridge arm and a midpoint between the first bus capacitor and the second bus capacitor.

The invention concerns an electrical system (1) of an electric vehicle or a hybrid electric vehicle, configured to charge and discharge a first battery (34) and a second battery (44) of the vehicle; the first battery (34) having a higher rated voltage than the second battery (44); the electrical system (1) comprising: a multi-phase transformer (20) comprising primary windings (P1, P2, P3), first secondary windings (S1, S2, S3) and tertiary windings (T1a-T1b, T2a-T2b, T3a-T3b or T1, T2, T3); a LLC primary circuit (12) comprising a first multi-phase H-bridge (B1) to control the primary windings (P1, P2, P3); the LLC primary circuit (12) being connected to the PFC converter; a HVDC part (30) to allow energy exchange with the first battery (34); the HVDC part (30) comprising a second multi-phase H-bridge (B2); a LVDC part (40) to allow energy exchange with the second battery (44); the LVDC part (40) comprising a rectifier (41) configured to control the tertiary windings of the transformer (20).

A method, apparatus, and system to control a multi-phase converter having at least one power channel with a plurality of power modules, and involves detecting the voltage and the current of the power modules, calculating a command voltage based on a product of a programmed virtual resistance and the detected current, and transmitting a command voltage signal to the power modules based on the calculated command voltage.

A power supply includes an active bridge section with input terminals that receive power from a constant current source where the active bridge section operates at a fixed switching frequency. The power supply includes a resonant section with a resonant inductor and a resonant capacitor. The resonant section is connected to an output of the active bridge section. The power supply includes an output rectifier that receives power from the resonant section and includes output terminals for connection to a load and a controller that regulates output current to the load where the controller regulates output current to the load by controlling switching of the active bridge section. The fixed switching frequency of the active bridge section matches a resonant frequency of the resonant section.