This paper analyzes the principle of driving circuit and switching off protection circuit of IGBT for vehicle, puts forward a new switching over-voltage protection circuit, through the cooperation of driving circuit and protection circuit to achieve the control of dynamic voltage rise, finally drives IGBT stably and protects IGBT from damage due to over-voltage. Through the establishment and simulation of simulation schematic diagram in PSpice , the simulation results prove that the circuit can effectively suppress the over-voltage generated in the process of IGBT shutdown, protect IGBT shutdown, and improve the stability of the circuit.
