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Speed Control for PMSM with Fast Variable-Speed Sliding Mode Control via High-Gain Disturbance Observer

Author

Listed:
  • Hengqiang Wang

    (School of Mechanical and Power Engineering, Nanjing Tech University, Nanjing 211816, China
    School of Electrical and Control Engineering, Nanjing Polytechnic Institute, Nanjing 210048, China)

  • Guangming Zhang

    (School of Mechanical and Power Engineering, Nanjing Tech University, Nanjing 211816, China)

  • Xiaojun Liu

    (School of Mechanical and Power Engineering, Nanjing Tech University, Nanjing 211816, China)

Abstract

Since robustness only exists on the sliding mode/surface, sliding mode control is non-globally stable. Therefore, shortening the time to reach the sliding mode is an important method of improving sliding mode robustness. However, there is an inherent contradiction between rapidity and overshoot. Therefore, ensuring rapid convergence without overshoot is a worthwhile research problem. Consequently, this paper proposes a design for a fast variable speed reaching law (FVSRL) to improve the quality of sliding mode control. The constructed approach rate is based on a variable speed term, an exponential term, and a fast term, ensuring rapid convergence without overshoot. At the same time, a high-gain disturbance observer is employed for feedforward compensation. Finally, the designed reaching law is validated by comparing it with conventional exponential approach rates and a new sliding mode reaching law, demonstrating its superior performance. Detailed comparative and quantitative analyses of the simulation results using the conventional exponential reaching law, the new sliding mode reaching law, and the FVSRL are performed, utilizing metrics such as integrated square error, integral time square error, integrated absolute error, and integral time absolute error.

Suggested Citation

  • Hengqiang Wang & Guangming Zhang & Xiaojun Liu, 2024. "Speed Control for PMSM with Fast Variable-Speed Sliding Mode Control via High-Gain Disturbance Observer," Mathematics, MDPI, vol. 12(13), pages 1-14, June.
  • Handle: RePEc:gam:jmathe:v:12:y:2024:i:13:p:2036-:d:1426018
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