针对异步电动机转子磁链定向的矢量控制系统，逆变部分采用的三电平拓扑结构，算法是采用的传统的SVPWM调制方法。-For the vector control system of induction motor rotor flux orientation, the three level topology is adopted in the inverter, and the algorithm is the traditional SVPWM modulation method.