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Short-circuit phase winding fault is a common type of fault in electrical driving systems, which brings great threat to the safety to the whole system. In this paper, a control strategy is proposed to reduce the torque ripples caused by the short-circuit fault. The torque ripples consist of two portions, namely the torque ripples caused by the phase missing, the other is caused by short-circuit current itself. The strategy is composed of two steps. The first step is to get access to the accurate short-circuit current by the method of calibration. The next step adjusts the amplitude and phase of each phase current first to reduce the first portion of torque ripples, then the corresponding compensation current is calculated by the principle of maintaining the Q-axis and D-axis current and injected into each phase winding to eliminate the second portion of torque ripples. Finally, a simulation-model is established and verifies the effectiveness of the proposed control strategy.

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A Short-Circuit Phase Winding Fault-Tolerant Control Strategy for Symmetrical Six-Phase Permanent Fault-Tolerant Motor

  • 会议论文

  • 发表日期：

    2026年

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  • Yixiao Feng,
  • Ting Tang,
  • Canyu Chen,
  • Rui Zeng,
  • Jie Tang,
  • Liyan You,
  • Liyi Li,
  • Jiaxi Liu

摘要

Short-circuit phase winding fault is a common type of fault in electrical driving systems, which brings great threat to the safety to the whole system. In this paper, a control strategy is proposed to reduce the torque ripples caused by the short-circuit fault. The torque ripples consist of two portions, namely the torque ripples caused by the phase missing, the other is caused by short-circuit current itself. The strategy is composed of two steps. The first step is to get access to the accurate short-circuit current by the method of calibration. The next step adjusts the amplitude and phase of each phase current first to reduce the first portion of torque ripples, then the corresponding compensation current is calculated by the principle of maintaining the Q-axis and D-axis current and injected into each phase winding to eliminate the second portion of torque ripples. Finally, a simulation-model is established and verifies the effectiveness of the proposed control strategy.