A fault tolerant inverter with minimum-switch based permanent magnet synchronous motor(PMSM) direct torque control(DTC) drive system was investigated.The fault tolerant inverter,which was used to replace the standard 6-switch 3-phase inverter in the normal PMSM DTC drive system,can be reconfigured to two 4-switch inverters when inverter faults or motor faults occurred.Modelling of the post-fault 4-switch inverters was analyzed,and a modified DTC strategy based on these two post-fault 4-switch inverters was ...