An electric power conversion circuit includes: first through fourth port terminals; first through fourth switches that are connected with each other in a bridge configuration; fifth through eighth switches that are respectively connected in parallel with the first through fourth switches; first through eighth diodes that are respectively connected in series with the first through eighth switches; a first bootstrap circuit that is connected to control terminals of the first, second, fourth, and sixth switches; and a second bootstrap circuit that is connected to control terminals of the third, fifth, seventh, and eighth switches.

An electric power conversion circuit includes: first through fourth port terminals; first through fourth switches that are connected with each other in a bridge configuration; fifth through eighth switches that are respectively connected in parallel with the first through fourth switches; first through eighth diodes that are respectively connected in series with the first through eighth switches; a first bootstrap circuit that is connected to control terminals of the first, second, fourth, and sixth switches; and a second bootstrap circuit that is connected to control terminals of the third, fifth, seventh, and eighth switches.

This disclosure describes a system and method for enabling an inverter to temporarily sustain fault current. One implementation is a system that includes an inverter having a plurality of transistors. A reservoir having an outlet channel is configured to contain a compressed gas. The outlet channel is arranged to direct the compressed gas towards a heatsink in thermal communication with one or more of the plurality of transistors. A control valve can be positioned between the reservoir and the outlet channel and a controller can be configured to detect an overcurrent event in the inverter and, in response, open the control valve. A transformer is electrically connected to an output of the inverter and configured to step down voltage from the inverter to a circuit being supplied by the inverter.

This disclosure describes a system and method for enabling an inverter to temporarily sustain fault current. One implementation is a system that includes an inverter having a plurality of transistors. A reservoir having an outlet channel is configured to contain a compressed gas. The outlet channel is arranged to direct the compressed gas towards a heatsink in thermal communication with one or more of the plurality of transistors. A control valve can be positioned between the reservoir and the outlet channel and a controller can be configured to detect an overcurrent event in the inverter and, in response, open the control valve. A transformer is electrically connected to an output of the inverter and configured to step down voltage from the inverter to a circuit being supplied by the inverter.

A wireless charging control circuit includes at least one control sub-circuit. Each control sub-circuit is configured to, prior to turn-on of a target switching transistor based on a received PWM signal, send a pulse width adjustment instruction to a signal processor corresponding to the target switching transistor based on a voltage difference between a first terminal and a second terminal of the target switching transistor, to instruct the signal processor to adjust a pulse width of a next PWM signal input to the target switching transistor. In this way, the wireless charging control circuit is capable of adaptively regulating the pulse width of the PWM signal, which avoids excessively large or small dead times, such that electromagnetic interference is prevented and conversion efficiency of a charging circuit is improved.

A wireless charging control circuit includes at least one control sub-circuit. Each control sub-circuit is configured to, prior to turn-on of a target switching transistor based on a received PWM signal, send a pulse width adjustment instruction to a signal processor corresponding to the target switching transistor based on a voltage difference between a first terminal and a second terminal of the target switching transistor, to instruct the signal processor to adjust a pulse width of a next PWM signal input to the target switching transistor. In this way, the wireless charging control circuit is capable of adaptively regulating the pulse width of the PWM signal, which avoids excessively large or small dead times, such that electromagnetic interference is prevented and conversion efficiency of a charging circuit is improved.