Open Access

ARTICLE

Position Sensorless Control System of Permanent Magnet Synchronous Linear Motor Based on Sliding Mode Observer with an Improved Phase-Locked Loop

Jin Zhang¹, Youliang Tang¹, Feng Yu^2,*
1 Department of Mechanical and Electrical Engineering, Suqian College, Suqian, 223800, China
2 School of Electrical Engineering, Nantong University, Nantong, 226019, China
* Corresponding Author: Feng Yu. Email:

Energy Engineering 2021, 118(4), 1083-1094. https://doi.org/10.32604/EE.2021.014482

Received 30 September 2020; Accepted 16 November 2020; Issue published 31 May 2021

Abstract

In this paper, position sensorless control system of permanent magnet synchronous linear motor (PMSLM) based on sliding mode observer (SMO) with an improved phase-locked loop (PLL) is studied. Firstly, according to the mathematical model, a SMO is designed for sensorless control PMSLM drive. Thereafter, an improved PLL is proposed to tackle the imperfection of data overflow existed in the traditional PLL. The designed SMO incorporating with the improved PLL can be effectively suppress the pulsation of the estimated position and hence the chattering of the derived electrical angular velocity. At last, simulated and experimental results are presented to verify the effectiveness and feasibility of the position sensorless control system.

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Keywords

Position sensorless; PMSLM; SMO; PLL

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