An Improved Two-Degree-of-Freedom Speed Controller for Permanent-Magnet Synchronous Motors

Chaoming Huang, Jinyang Wu, Ping Lin (), Kai Lin and Yuan Gao
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Chaoming Huang: College of Marine Engineering, Jimei University, Xiamen 361021, China
Jinyang Wu: School of Computing and Information Systems, Singapore Management University, Singapore 188065, Singapore
Ping Lin: The Key Laboratory of Intelligent Control and Optimization for Industrial Equipment of Ministry of Education, School of Control Science and Engineering, Dalian University of Technology, Dalian 116024, China
Kai Lin: The Key Laboratory of Intelligent Control and Optimization for Industrial Equipment of Ministry of Education, School of Control Science and Engineering, Dalian University of Technology, Dalian 116024, China
Yuan Gao: School of Engineering Space Park Leicester, University of Leicester, Leicester LE1 7RH, UK

Energies, 2025, vol. 18, issue 17, 1-15

Abstract: For the traditional one-degree-of-freedom controller, there is a trade-off between the tracking performance and disturbance rejection performance. The traditional two-degree-of-freedom controller can achieve disturbance rejection and tracking simultaneously, when there are one tracking channel and one disturbance rejection channel. To overcome the limitations of the one-degree-of-freedom controller and the traditional two-degree-of-freedom controller, an improved two-degree-of-freedom controller is designed for the speed regulation system of a permanent-magnet synchronous motor (PMSM) for use in electric aircraft scenarios and PMSM control applications. This proposed controller includes three elements: a proportional forward element, a proportional–integral feedback element, and a linear extended state observer element. The proportional forward element is used for tracking, and the proportional–integral feedback element and linear extended state observer element are used for disturbance rejection. The controller can simultaneously achieve tracking and disturbance rejection. The proportional forward element guarantees tracking performance, while the proportional–integral feedback and linear extended state observer elements enhance disturbance rejection. The stability of the proposed controller is experimentally demonstrated, and the results show that the improved controller offers superior tracking and disturbance rejection compared to traditional 1-DoF and 2-DoF controllers.

Keywords: two-degree-of-freedom controller; tracking performance; disturbance rejection performance; permanent-magnet synchronous motor (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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