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Optimized Fault-Tolerant Control of Dual Three-Phase PMSM Under Open-Switch Faults

Author

Listed:
  • Lei Chen

    (Department of Applied Electronics, Zhejiang University, Hangzhou 310027, China)

  • Min Chen

    (Department of Applied Electronics, Zhejiang University, Hangzhou 310027, China)

  • Bodong Li

    (Department of Applied Electronics, Zhejiang University, Hangzhou 310027, China)

  • Xinnan Sun

    (Department of Applied Electronics, Zhejiang University, Hangzhou 310027, China)

  • Feng Jiang

    (Department of Applied Electronics, Zhejiang University, Hangzhou 310027, China)

Abstract

In this article, an optimized fault-tolerant control (FTC) method without current judgement is proposed for open-switch faults (OSFs) in dual three-phase permanent magnet synchronous motor (DTPMSM) drives. The reason for the torque ripple under OSFs has been investigated. The theoretical analysis reveals a significant increase in torque ripple under OSFs. Then, an optimized FTC method is proposed for a DTPMSM with two isolated neutral points. The proposed method maintains the original control scheme, enabling the smooth transitions of current and torque between faulty operation and FTC without introducing noticeable torque ripples. In addition, the universality and robustness are enhanced by eliminating the need for current judgement, thereby avoiding misjudgments due to sinusoidal current zero crossings, sudden load, or speed changes. The experimental results are presented to validate the effectiveness of the proposed FTC strategy under OSFs on a laboratory DTPMSM.

Suggested Citation

  • Lei Chen & Min Chen & Bodong Li & Xinnan Sun & Feng Jiang, 2024. "Optimized Fault-Tolerant Control of Dual Three-Phase PMSM Under Open-Switch Faults," Energies, MDPI, vol. 17(20), pages 1-19, October.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:20:p:5198-:d:1501799
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