Research on Open Circuit Fault Location and Fault Tolerant Control of Inverter Power Transistor

Abstract As the key equipment of power conversion, stability inverter directly affects working state equipment. Aiming at open circuit fault tube, this paper designs a diagnosis and tolerance scheme three-phase bridge based on current signal. Firstly, amplitude phase characteristics vector are used to judge location tube. Then output characteristic signal is converted into fault-tolerant control The leg switched under bridge. simulation results show that method proposed in can health status with high accuracy achieve tolerant control, improving inverter.