在感应电机直接转矩控制(DTC)调速系统中，常规PID速度调节器在电机受到扰动的情况下，需要花费较长时间才能使电机恢复到稳态值。为此，将一种新型的自抗扰控制器(ADRC)引入感应电机直接转矩控制调速系统中，设计速度ADRC调节器代替PID调节器，基于模型参考自适应控制（MRAS）方法设计速度观测器。对比分析了PID与ADRC两种方案下无速度传感器直接转矩控制交流调速系统性能。仿真试验结果表明，采用ADRC后，系统动态响应更快，抗扰动能力更强，在电机参数摄动的情况下，电机运行速度与指令速度偏差更小。

In direct torque control system, the PID controller is often adopted to be the speed adjuster. When disturbances are thrown to the motor, a long time is taken to renew the motor to steady state. In this paper, new auto-disturbance-rejection controller (ADRC) is introduced into direct torque control system. Instead of PID speed adjuster, ADRC speed adjuster is designed. The speed observer is designed based on model reference adaptive system (MRAS), too. The performance difference is analyzed between PID controller and ADRC in speed sensorless direct torque control system. The simulation results show that the AC speed adjustable system has speedier response performance, stronger disturbance-rejection performance when ADRC is adopted. Moreover, according to simulation results, there is smaller warp between motor command speed and actual speed when motor parameters perturb.