在感应电机直接转矩控制的基础上,提出了基于无功功率的转速自适应辨识模型,并 运用MATLAB/SIMULINK 工具进行仿真,仿真结果证明,该速度辨识器具有较好的辨识效果。 关键词:感应电机 无功功率 MRAS 转速辨识 Abstract: This paper introduces a speed-sensorless adaptive estimation model which based on reactive-power. Then the simulating model of speed-sensorless direct torque control (DTC) system found on MATLAB7.0/SIMULINK is given. Simulation results indicate that model reference adaptive system(MRAS) estimation model has good response performance. Key words: Induction motor, Reactive-Power, MRAS, speed Estimation