关键词: 异步感应电机, 无速度传感器, 自适应控制, 模型参考自适应, 同步旋转坐标系, 磁场定向控制

Abstract: In order to improve the control accuracy of a three-phase asynchronous induction motor and optimize the control strategy of traditional speed sensorless rotational speed estimation, a new strategy for rotor field-oriented control of speed sensorless induction motor based on model reference adaptive system under synchronous rotating reference frame was studied. The improved control model utilized the rotor flux current model as the reference model, the rotor flux voltage model, and the feedback of rotating speed as the controlled model. The model applied the arithmetic theory of motor stator current and rotor flux to design the estimation method for the rotor’s flux, rotational speed, and angle under the synchronous rotating reference frame. After simulation and experimental results demonstrate that the improved control method under the synchronous rotating reference frame has higher estimation accuracy and faster response, which improves the estimation accuracy and robustness of induction motor field-oriented control.

Key words: asynchronous induction motor, speed sensorless, adaptive control, model reference adaptive system(MRAS), synchronous rotating frame, field-oriented control