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。-Direct torque control of the matlab simulation to the asynchronous motor as the control object, flux, torque double closed loop, the use of circular flux as the goal, get better simulation res