摘  要：根据直接转矩控制理论，在Matlab7.1/Simulink下构造了一个异步电机直接转矩控制系统的仿真模型。为了进一步提高直接转矩控制系统的性能，引进了调整系统控制量的模糊PID速度调节器，并与常规的PID速度调节器进行了对比。仿真结果表明，采用模糊PID速度调节器可以提高系统的响应速度和稳定性，同时验证了该模型的正确性和控制方案的有效性。该控制方法可大大提高系统的响应速度和稳定性。
关键词：感应电动机；直接转矩控制；模糊控制器；仿真

Abstract: According to the principle of direct torque control,a DTC system model of induction motor was constructed with Matlab7.1/Simulink.In order to further improve the performance of direct torque control system,the paper proposed a fuzzy PID regulator of motor speed which adjusted the control variable,and compared with the traditional PID regulator. The simulation results showed that the fuzzy PID regulator can improve the responding speed and the steady of the system greatly,proved the model was correct and the control method was effective.
Key Words: Induction motor;DTC；Fuzzy controller;Simulink