Importance

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Abstract

Systems, circuits, and methods provide controlled active DC bus discharge, such as for electric vehicles (EVs) or hybrid vehicles. Controlled active DC bus discharge can be provided using gate drivers to control operation of traction inverter switches, such as power transistors, to accomplish a charge bleeding function. Power transistors can be configured so that the gate is connected to the drain, thereby forcing the gate threshold voltage across drain and source. The gate of a power transistor can be actively driven between a threshold voltage and Miller plateau threshold voltage. As a result, several volts can be generated across the power transistor while current decays, therefore safely discharging the system DC bus.

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First Claim