Gate overvoltage protection circuit

The reasons for overvoltage on the gate of IGBT: 1. Static electricity accumulation on the gate capacitor causes overvoltage. 2. Gate overvoltage caused by the Miller effect of capacitance. In order to prevent the gate-emitter overvoltage of IGBT from occurring, A resistor of tens of kiloohms should be connected in parallel between the gate and emitter of the IGBT, as shown in the figure above. This resistor should be as close as possible to the gate and emitter.