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A Composite Variable Structure PI Controller for Sensorless Speed Control Systems of IPMSM

Author

Listed:
  • Weidong Feng

    (College of Electrical and Information Engineering, Beihua University, Jilin 132013, China)

  • Jing Bai

    (College of Electrical and Information Engineering, Beihua University, Jilin 132013, China)

  • Zhiqiang Zhang

    (Power Supply Company, Baotou 014000, China)

  • Jing Zhang

    (College of Electrical and Information Engineering, Beihua University, Jilin 132013, China)

Abstract

In the speed control system of an Interior Permanent Magnet Synchronous Motor (IPMSM) without a speed sensor, PI controllers using only a fixed set of parameters cannot achieve accurate tracking of the estimated speed in a wide speed domain and also suffer from step response overshoot. This paper proposes a Compound Variable Structure PI (CVSPI) controller to improve the system control performance. It can choose whether to include an integral term according to the size of the system deviation to speed up the response. It also introduces a Model Reference Adaptive System (MRAS) speed observer in the controller to estimate the speed and adaptively adjust the size of the anti-integration saturation gain to improve the dynamic response following performance and immunity of the system. A feed-forward link is added for a given input differential to achieve an accurate answer to time-varying inputs. As the linear compensation matrix of the conventional MRAS is a unit matrix, the speed can only be accurately observed in a specific speed range. In this paper, a new linear compensation matrix is designed, and a new speed adaptive law is derived, allowing the improved MRAS to measure speed over a wide range accurately. Simulation results validate the excellent control performance of the CVSPI and the accuracy of the enhanced MRAS over a wide speed range.

Suggested Citation

  • Weidong Feng & Jing Bai & Zhiqiang Zhang & Jing Zhang, 2022. "A Composite Variable Structure PI Controller for Sensorless Speed Control Systems of IPMSM," Energies, MDPI, vol. 15(21), pages 1-18, November.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:21:p:8292-:d:964943
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    References listed on IDEAS

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    1. Yubo Liu & Junlong Fang & Kezhu Tan & Boyan Huang & Wenshuai He, 2020. "Sliding Mode Observer with Adaptive Parameter Estimation for Sensorless Control of IPMSM," Energies, MDPI, vol. 13(22), pages 1-18, November.
    2. Song Wang, 2013. "ADRC and Feedforward Hybrid Control System of PMSM," Mathematical Problems in Engineering, Hindawi, vol. 2013, pages 1-12, December.
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