Sensorless control of induction motor based on high-order sliding mode observer and improved PLL
This paper proposes a sensorless control method for induction motors based on a high-order sliding mode observer and an improved phase-locked loop to address the inherent chattering problem of traditional first-order sliding mode observer sensorless control.Firstly,an adaptive non-singular fast terminal sliding mode magnetic flux observer is proposed,which can make the system wholely converge quickly and reduce chattering,while effectively improving the robustness of the system;Secondly,the hyper spiral algorithm is introduced into the traditional PLL,and an improved phase-locked loop based on the third-order hyper spiral algorithm is designed to further improve the accuracy of speed estimation and effectively suppress speed jitter;Finally,the simulation results show that the proposed control strategy can effectively improve the robustness of the system,suppress the chattering of the estimated speed,and demonstrate the effectiveness and feasibility of the proposed method.
万方数据
维普
