Abstract: The switched reluctance motor control system for electric vehicles includes motor drive and battery

charging circuit，which reduces system integration and power density. Based on the asymmetric half-bridge power

converter of switched reluctance motor，an integrated power converter for electric vehicle was designed. The front-end circuit was added，and two working modes of motor driving and battery charging could be realized by controlling the front-end circuit. The energy ratio of the system was improved by using the charge-discharge function of the capacitor in the motor driving mode，the capacity estimation method of the capacitor was given，and the influence of different capacities on system performance was compared. In the battery charging mode，the motor winding was used as the charging inductance，multiplexing the original power devices，the functional charging mode with power factor correction（PFC）was realized，the AC signal was effectively improved，the limiting conditions of the motor winding as the charging inductance were analyzed，the constant current charging and constant voltage charging process were realized. Finally，the effectiveness of the scheme were verified byMatlab/Simulink simulation.

      Key words: electric vehicle；switched reluctance motor；power converter；energy ratio；power factor correction