A self-oscillating electronic LC resonant inverter for use in fixed-frequency power converters, providing zero-current and zero-voltage soft switching. The inverter incorporates an active fixed-frequency series resonant current pump capable of pumping the tank circuit current up as well as down. The magnitude of the resonant current is controlled at the resonant frequency of the LC tank circuit.

An output stabilization circuit (1) includes: a primary-side circuit (2) including a self-oscillation circuit (10) connected to a DC power supply; and a secondary-side circuit (3) obtaining an output voltage by oscillation of the self-oscillation circuit, wherein the self-oscillation circuit includes a drive transformer of which a secondary-side coil is connected to a gate electrode of each of a plurality of switching elements connected in a half-bridge configuration or a full-bridge configuration, a feedback transformer of which a primary-side coil is connected to a power transmission coil, and a phase shift filter that is connected between a secondary-side coil of the feedback transformer and a primary-side coil of the drive transformer and includes a primary-side control coil having a characteristic that an inductance changes in accordance with a current flowing through a secondary-side control coil of the secondary-side circuit.

A flyback converter includes a transformer, a switching circuit, and a regulating circuitry coupled with a primary winding circuit of the transformer. The switching circuit includes a primary switch which is switchable between an ON state and an OFF state and a switch coupled to the primary switch of the primary winding circuit. The switch is configured to change the state of the primary switch in response to a current change in the primary winding circuit under normal operation. The regulating circuit includes a regulator coupled between the switch and the primary winding. The regulator is configured to feed an additional current to the switch in response to a voltage applied from the primary winding to the regulator. In response to the additional current fed by the regulator, the switch is urged to change the state of the primary switch earlier than under normal operation.

A flyback converter includes a transformer, a switching circuit, and a regulating circuitry coupled with a primary winding circuit of the transformer. The switching circuit includes a primary switch which is switchable between an ON state and an OFF state and a switch coupled to the primary switch of the primary winding circuit. The switch is configured to change the state of the primary switch in response to a current change in the primary winding circuit under normal operation. The regulating circuit includes a regulator coupled between the switch and the primary winding. The regulator is configured to feed an additional current to the switch in response to a voltage applied from the primary winding to the regulator. In response to the additional current fed by the regulator, the switch is urged to change the state of the primary switch earlier than under normal operation.

Systems and Methods for providing power to downhole to a pulsed drilling scheme. For example, methods and systems herein may comprise a pulsed power drill bit comprising one or more electrodes, and a pulse-generating (PG) circuit configured to provide an electric potential across the one or more electrodes. In addition. a boost charger configured to charge an energy storage component in the PG circuit and a power supply configured to provide voltage to the PG circuit.

A self-oscillating electronic LC resonant inverter for use in fixed-frequency power converters, providing zero-current and zero-voltage soft switching. The inverter incorporates an active fixed-frequency series resonant current pump capable of pumping the tank circuit current up as well as down. The magnitude of the resonant current is controlled at the resonant frequency of the LC tank circuit.

This application provides a voltage converter and a power supply system. In one example, a voltage converter includes a voltage conversion circuit and a controller. The voltage conversion circuit is configured to receive an input voltage from a power supply, and perform buck conversion on the input voltage to obtain an output voltage, to supply power to a load. The controller is configured to: when the voltage conversion circuit is in a first state, control the output voltage by controlling a level conduction signal of the voltage conversion circuit, to supply power to the load. The first state is a state in which a value of a duty ratio of the voltage conversion circuit is greater than or equal to a preset duty ratio value. The first state includes a first saturation state and a second saturation state.

A resonant converter, a control method of a resonant converter, and a related device. The resonant converter includes a control circuit, a drive circuit, and a switch circuit. The control circuit is configured to generate, based on a target output electrical parameter of the resonant converter, a first pulse signal and a second pulse signal that have different frequencies. The control circuit is further configured to: obtain a first drive signal based on the first pulse signal and the second pulse signal and send the first drive signal to the drive circuit. The drive circuit is configured to: convert the first drive signal into one or more second drive signals and send the one or more second drive signals to the switch circuit, to turn on or off a switch component in the switch circuit.

A resonant converter, a control method of a resonant converter, and a related device. The resonant converter includes a control circuit, a drive circuit, and a switch circuit. The control circuit is configured to generate, based on a target output electrical parameter of the resonant converter, a first pulse signal and a second pulse signal that have different frequencies. The control circuit is further configured to: obtain a first drive signal based on the first pulse signal and the second pulse signal and send the first drive signal to the drive circuit. The drive circuit is configured to: convert the first drive signal into one or more second drive signals and send the one or more second drive signals to the switch circuit, to turn on or off a switch component in the switch circuit.

A power converter includes an inductor configured to be coupled with a direct current voltage source. The power converter includes a first switching device coupled with the inductor and a second switching device coupled with the inductor. The first switching device and the second switching device are arranged in parallel. The first switching device and the second switching device have a similar drain resistance.