中文说明：
SVPWM为改进的对传统的直接转矩控制的matlab仿真，以异步电动机为控制对象，磁链、转矩双闭环，采用圆形磁链为目标，得到较好的仿真结果
English Description：
SVPWM is an improved matlab simulation of the traditional direct torque control. Taking the asynchronous motor as the control object, the flux and torque are double closed-loop, and the circular flux is used as the target, the better simulation results are obtained