Safety Circuit and Emergency Power Supply for Gate Control Circuit

摘要

A power supply circuit can be used to provide an alternating-current supply voltage to an electric motor. The power supply circuit is supplied by line power. The power supply circuit includes a inverter including at least one pair of transistor for generating a corresponding phase of the plurality of power supply phases. The inverter includes a transistor control circuit for switching the low-side transistor to its conducting state and the high-side transistor to its non-conducting state in case an excess voltage is detected at the input of the inverter.

主权项

1. An electric power supply comprising:
a current inverter configured to supply an electric motor, the current inverter comprising a pair of transistors coupled to an intermediate direct-current supply voltage, the current inverter adapted for providing an alternating current to the electric motor; and a transistor control circuit coupled to gates of the pair of transistors, the transistor control circuit configured to switch a high-side transistor of the pair of transistors to its non-conducting state and a low-side transistor of the pair of transistors to its conducting state in case of a breakdown of the direct-current voltage supply.