说明：  在matlab r2010a环境下按照博士论文中规中矩建立的直接转矩控制模型，反馈转矩如果采用电机模型输出的转矩系统能很好的工作
(Model of direct torque control in matlab r2010a environment in accordance with the established law-abiding, PhD thesis, feedback torque output torque of the motor model system can work well)