基于自适应速度观测器的感应电机控制策略

Induction Motor Control Strategy Based on Full Order Adaptive Speed Observer

给出了一种基于全阶模型参考自适应速度观测器的感应电机速度和磁通控制策略。该控制策略能确保转子速度和转子磁通幅值准确跟踪参考值,且对转子时间常数的漂移和负载转矩的变化具有强鲁棒性。控制器的结构由开环和闭环两部分组成,其中开环控制器确保控制信号能够准确跟踪期望值,闭环控制器由实现系统鲁棒镇定。所采用的速度观测器在低速条件下性能良好,观测结果明显优于传统速度观测器。仿真结果验证了该控制策略和速度观测器的有效性。

An induction motor speed and flux control strategy based on full order adaptive speed observer was proposed The control strategy ensured the rotor speed and the magnitude of the rotor flux to track their reference value accurately, and had high robustness against to the variations of the rotor time constant and the load torque. The proposed control law was based on two parts： an open-loop controller which ensured that control output could track the desired trajectories accurately and a closed-loop strategy based on PI controllers for the stabilization realized the robust stability. The proposed speed observer had a good performance at low speed region and behaved obvious advantage compared to traditional speed observers. The simulation verified the validity of the method.