Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Accuracy improvement of maximum torque per ampere control for interior permanent magnet synchronous motor drives reflecting PM flux linkage variations

  • Sungmin Choi (Department of Electrical Engineering, Jeonbuk National University) ;
  • Woongkul Lee (Department of Electrical and Computer Engineering, Michigan State University) ;
  • Areum Kang (Department of Electrical Engineering, Jeonbuk National University) ;
  • Seunghun Baek (Department of Electronic Engineering, Keimyung University) ;
  • Jae Suk Lee (Department of Electrical Engineering, Jeonbuk National University)
  • Received : 2022.12.05
  • Accepted : 2023.08.28
  • Published : 2023.11.20
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Abstract

An algorithm for an interior permanent magnet synchronous motor (IPMSM) drive to improve the accuracy of maximum torque per ampere (MTPA) control reflecting variations in the permanent magnet (PM) flux linkage is proposed in this paper. In IPMSM drives, reluctance and PM torque are generated, and both the efciency and developed torque of IPMSM drives are directly affected by parameter variations. A stator flux linkage observer estimates PM flux linkage in real time, and a correction factor for torque error compensation is computed. The MTPA trajectory is formed into a two-dimensional look-up table (LUT), which is used to allow the MTPA trajectory to correct the torque error caused by parameter changes. In this paper, the proposed torque error compensation IPMSM control method is implemented and confirmed by simulation and experimental results.

Keywords

Acknowledgement

This work was partly supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2020R1C1C1013260), and Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government (MOTIE) (No. 20224000000440, Sector coupling energy industry advancement manpower training program).

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