【摘要】 电动汽车用开关磁阻电机控制系统包含电机驱动和电池充电电路，降低了系统集成度和功率密度。以开关磁阻电机不对称半桥式功率变换器为基础，设计了一种用于电动汽车的集成功率变换器，增加了前端电路，通过控制前端电路可以实现电机驱动和电池充电两种工作模式。在电机驱动模式下利用电容器的充放电功能提高了系统的能量比，给出了电容器的容量估算方法，对比了不同容量对系统性能的影响。在电池充电模式下利用电机绕组作为充电电感，对原有功率器件复用，实现了具有功率因数校正（PFC）的功能充电方式，有效地改善了交流信号，分析了电机绕组作为充电电感的限定条件，实现了恒流充电和恒压充电过程，最后通过Matlab/Simulink仿真验证了方案的有效性。更多还原

【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 by Matlab/Simulink simulation.更多还原