摘  要：采用全阶磁链闭环观测器以实现直接转矩控制系统定子磁链的准确观测。在此基础上推导了两种速度估计器，并对上述两种速度估计器对比仿真和实验。仿真和实验结果表明：依据模型参考自适应理论设计出的速度估计器比依据李亚普诺夫理论构造的速度估计器辨识速度收敛快，动态性能更好。
关键词：交流感应电动机；直接转矩控制；速度估计器；模型参考自适应

Abstract: This paper achieved the accurate observation of DTCS stator flux with a full-order closed-loop flux observer.The two speed-estimators were derived on this basis,both the speed estimators were compared to simulate and experiment.The results of simulation and experiment show that the designed speed-estimator based on MRAS has more rapid convergence speed and better dynamic performance than structured based on the Lyapunov theory.
Key Words: Induction AC;Direct torque control;Speed-estimator;MRAS