Sliding Mode Fault-tolerant Control Based on Fast Convergence Law for Faults of PMSM  

作　　者：Wan Feng Mengdi Li Wenjuan Zhang Shoudao Huang Haixia Zhang 

机构地区：[1]College of Electronic Information and Electrical Engineering,Changsha University,Changsha 410000,China [2]College of Electrical and Information Engineering,Hunan University,Changsha 410000,China

出　　处：《Chinese Journal of Electrical Engineering》2024年第3期147-157,共11页中国电气工程学报（英文）

基　　金：Supported by the National Natural Science Foundation of China under Grant 52077011;Hunan Provincial Natural Science Foundation 2024JJ7614,2024JJ7615 and 2024JJ6089;Hunan Education Department Science Research Project under Grant 23B0785 and 23B0793;Major Special Projects of Changsha under Grant kq2105001.

摘　　要：It is difficult for the traditional PI controller to meet high-performance control requirements under the demagnetization fault of a permanent magnet synchronous motor(PMSM).To address this problem,this study proposes a novel sliding mode fault-tolerant control method for PMSM demagnetization faults.First,the mathematical model of PMSM under demagnetization fault state is established,and the reasons for poor fault tolerance of the conventional PI controller are analyzed.A new convergence law is used to design the speed loop sliding mode feedback controller,and its stability is demonstrated.Meanwhile,an adaptive forgetting factor recursive least squares(AFRLS)flux linkage observer is designed to keep the controller parameter values in line with the actual motor parameter values,to reduce the impact of demagnetization faults on motor control performance and achieve fault-tolerant control of demagnetization faults.Finally,simulation and experimental comparison with conventional PI control demonstrate that the proposed method is more robust and resistant to interference.

关 键 词：Permanent magnet synchronous motor demagnetization faults sliding mode fault-tolerant control flux linkage observer 

分 类 号：TM351[电气工程—电机]