摘要：目前电动汽车驱动系统普遍采用是直接供电的驱动方案，这种方案已经不能满足电动汽车动力性能的需要。当电动汽车在启动、加速等工况下，蓄电池的电压会由于瞬间大电流放电而急剧下降，逆变器的供电电压随之下降，电动汽车的驱动转矩下降，导致加速缓慢，使得动力性能变差。Z源逆变器是一种新型的升降压逆变器，具有许多传统逆变器不具有的优点。应用Z源逆变器到电动汽车的驱动系统，在工况变化时仍可以有效保证逆变器的输出电压的稳定，使驱动电机工作于额定电压点，有效改善电动汽车的动力性能。
关键词：Z源；逆变器；电动汽车；电机;仿真

Abstract:The solution of batteries directly supplying the traction controller，which is widely used on electric vehicle now，can not meet the demand of acceleration performance.When the electric vehicle begins to accelerate，the voltage of the batteries falls sharply and the output voltage of inverter falls too.Therefore，the acceleration performance of the electric vehicle gets worses.Z source inverter is a new buck-boost inverter, it has more advantages than traditional inverter.Z source inverter is applied in drive system in the electric vehicle is a new solution to improve the acceleration performance of electric vehicle.The Z source inverter can provide a steady output voltage to traction controller and the acceleration performance of electric vehicle is improved.
Key Words:Z source；Inverter；Electric vehicle；Motor; Simulation