An integrated topology of electric vehicle (EV) traction system and battery charging system is proposed. The integrated traction mode topology is equivalent to a DC/DC converter and a three phase 3H bridge inverter with open-end windings of PMSM. In order to improve the high reliability of the motor drive system, on the basis of analyzing PMSM mathematical model, the control strategy with fault tolerant capabilities for the three phase 3H bridge inverter is studied in this paper, the three phase 3H bridge inverter’s fault type is introduced. A kind of two phase hysteresis PWM control strategy is also introduced for open arm fault of the two phase 2H bridge inverter. Experimental results show that, in traction mode of the integrated topology, if the three phase 3H bridge inverter fails, a good operating performance of PMSM system can be achieved by the reconstruction of the inverter topology.