Wan Feng;Mengdi Li;Wenjuan Zhang;Shoudao Huang;Haixia Zhang
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引用次数: 0
摘要
传统的 PI 控制器很难满足永磁同步电机(PMSM)退磁故障下的高性能控制要求。针对这一问题,本研究提出了一种新型的 PMSM 失磁故障滑模容错控制方法。首先,建立了 PMSM 在退磁故障状态下的数学模型,并分析了传统 PI 控制器容错性差的原因。利用新的收敛规律设计了速度环滑模反馈控制器,并证明了其稳定性。同时,设计了自适应遗忘因子递归最小二乘(AFRLS)磁通量联动观测器,使控制器参数值与电机实际参数值保持一致,降低了退磁故障对电机控制性能的影响,实现了退磁故障的容错控制。最后,通过与传统 PI 控制的仿真和实验对比,证明了所提出的方法具有更强的鲁棒性和抗干扰性。
Sliding Mode Fault-Tolerant Control Based on Fast Convergence Law for Faults of PMSM
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.