基于SMMRAS观测器的永磁同步电机无速度传感器控制策略

Speed sensorless control strategy of permanent magnet synchronous motors based on SMMRAS observer

传统的模型参考自适应法存在参数、负载变化敏感和转速估计精度低等问题,由此提出一种基于SMMRAS观测器的永磁同步电机无速度传感器控制策略。为削弱滑模抖振,引入双曲正切趋近律并设计了积分型滑模转速控制器,并通过李雅普诺夫稳定性理论证明该系统的稳定性,最后通过搭建MATLAB/SIMULINK仿真模型验证SMMRAS观测器和积分型滑模转速控制器的可行性,仿真结果证明该控制方法不仅能抑制滑模抖振和信号噪声,而且还提高了鲁棒性。

The traditional model reference adaptive method has the problems of parameter,load change sensitivity and low speed estimation accuracy.Therefore,this paper proposes a speed sensorless control strategy of permanent magnet synchronous motor based on SMMRAS observer.In order to weaken the buffeting sliding mode,the hyperbolic tangent law is introduced and the integral-type sliding mode speed controller is designed.The stability of this system is proved by the Lyapunov stability theory,and finally a MATLAB/SIMULINK simulation model is built to verify the feasibility of the SMMRAS observer and the integral-type sliding mode speed controller.The simulation results prove that the control strategy can not only suppress the buffeting sliding mode and signal noise,but also improve the robustness.