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Optimized Feedback Type Flux Weakening Control of Non-Salient Permanent Magnet Synchronous Machines in MTPV Region with Improved Stability

Author

Listed:
  • Chao Wang

    (School of Electronic and Electrical Engineering, University of Sheffield, Mappin Street, Sheffield S1 3JD, UK)

  • Ziqiang Zhu

    (School of Electronic and Electrical Engineering, University of Sheffield, Mappin Street, Sheffield S1 3JD, UK)

  • Lei Xu

    (School of Electronic and Electrical Engineering, University of Sheffield, Mappin Street, Sheffield S1 3JD, UK)

  • Ximeng Wu

    (School of Electronic and Electrical Engineering, University of Sheffield, Mappin Street, Sheffield S1 3JD, UK)

  • Kejin Lu

    (School of Electronic and Electrical Engineering, University of Sheffield, Mappin Street, Sheffield S1 3JD, UK)

Abstract

This paper introduces an enhanced approach for optimizing the flux-weakening performance of a non-salient permanent magnet synchronous machine (PMSM), by incorporating the maximum torque per voltage (MTPV) region into a conventional voltage magnitude feedback control strategy. The MTPV control strategy is initially optimized for steady-state performance by incorporating the effect of resistance, which plays a crucial role in small power motors. To maintain stability and good dynamics in the flux-weakening region, a current command feedback MTPV controller is utilized, as opposed to a voltage command feedback approach. Additionally, to address stability concerns in the MTPV region, a feedback type proportional-integral (PI) MTPV controller is designed and implemented. The stability in both the over-modulation and various flux-weakening regions is further enhanced using a voltage vector modifier (VVM). Therefore, the proposed feedback-based flux-weakening control enhances system steady-state performance, dynamic response, and stability across both linear and over modulation regions under various flux-weakening conditions, making it suitable for general-purpose applications. The effectiveness of the proposed method is validated through experimental results.

Suggested Citation

  • Chao Wang & Ziqiang Zhu & Lei Xu & Ximeng Wu & Kejin Lu, 2025. "Optimized Feedback Type Flux Weakening Control of Non-Salient Permanent Magnet Synchronous Machines in MTPV Region with Improved Stability," Energies, MDPI, vol. 18(9), pages 1-22, April.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:9:p:2282-:d:1646116
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