Vol. 101

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2021-12-09

Sensorless Control of Permanent Magnet Synchronous Linear Motor Based on Sliding Mode Variable Structure MRAS Flux Observation

By Mingwei Li, Kailin Lv, Cheng Wen, Qiankai Zhao, Xingqiao Zhao, and Xin Wang
Progress In Electromagnetics Research Letters, Vol. 101, 89-97, 2021
doi:10.2528/PIERL21101401

Abstract

The object of this paper is a permanent magnet synchronous linear motor (PMLSM), whose control method is based on a model-referenced adaptive system (MRAS), and it analyses the speed identification of a permanent magnet synchronous linear motor without position sensors. The article proposes a new model-referenced adaptive method, which utilises a sliding-mode variable structure control method (SMC), to replace the PI control algorithm utilised in conventional model-referenced adaptive algorithm. The control system of the PMLSM is therefore designed and studied based on the change of the adaptive law in model-referenced adaption. the mathematical model of the PMLSM itself is chosen as the reference model, and the feedback magnetic chain model of the motor output is chosen as the adjustable model, replacing the conventional current model and simplifying the control algorithm. The sliding mode surface of the sliding mode variable structure control algorithm is constructed using the reference model and the output error of the adjustable model. Through theoretical analysis and simulation models built by MATLAB/Simulink simulation software, the simulation results show that the designed PMLSM speed induction-free control system MRAS speed observer based on the sliding mode variable structure has strong robustness and excellent dynamic static performance. The advantages verified by the new algorithm achieve the experimental purpose of the expected assumptions.

Citation


Mingwei Li, Kailin Lv, Cheng Wen, Qiankai Zhao, Xingqiao Zhao, and Xin Wang, "Sensorless Control of Permanent Magnet Synchronous Linear Motor Based on Sliding Mode Variable Structure MRAS Flux Observation," Progress In Electromagnetics Research Letters, Vol. 101, 89-97, 2021.
doi:10.2528/PIERL21101401
http://jpier.org/PIERL/pier.php?paper=21101401

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