Power electron device plays an important role in the development of inverter.A self switch off and intelligent device used in the power electron device have been produced.The inverter consisting of power electron device is economical,safe,fast,small in volume and high accurate.The inverter in this system consists of IGBT.The SPWM is adopted.This paper introduces the basic structure of three phase SPWM inverter and the desigh of the prime circuit,parallel buffer and drive circuit.The results show that the ad...