2results about How to "Increased shutdown speed" patented technology

A gate drive circuit adapted to high junction temperature environments, and its turn-on and turn-off methods, are disclosed. The gate drive circuit includes a main three-terminal transistor, a turn-off circuit, and an auxiliary circuit. The added auxiliary circuit generates an auxiliary current signal, either in the same direction or opposite to the control signal current, to the control electrode of the main three-terminal transistor during the turn-on and turn-off processes within a preset time period. This disclosure enables the generation of corresponding positive or negative auxiliary current signals at the control electrode of the three-terminal transistor. During the conduction process, the auxiliary circuit can generate a reverse auxiliary current signal at the control electrode of the three-terminal transistor during the current rise phase, reducing the drive current of the turn-on signal to decrease di. d / dt, suppressing the turn-on current; during the turn-off process, the auxiliary circuit can generate a unidirectional auxiliary current signal at the control electrode of the three-terminal transistor in the current-decreasing segment, increasing the drive current of the turn-off signal and accelerating the turn-off speed.

The utility model provides a kind of relay quick cut-off drive circuit, belong to power electronics technical field. Including control unit, power supply unit, first switch unit, first resistance, second resistance, PNP triode, first relay and first unidirectional conducting unit, the power supply unit has the emitter of connecting the PNP triode, the collector of the PNP triode is connected the first relay input end, the first relay output end is connected between the first switch unit and first resistance. The base of the PNP triode is connected between the first resistance and second resistance, the first unidirectional conducting unit is parallel in first relay both ends, the first unidirectional conducting unit is from first relay output end to first relay input end unidirectional conduction. When applied to STS, the cut-off speed of relay can be improved, finally realizes the quick disconnection of inverter INV and power grid GRID.