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<p>The vibration and noise of polyphase motors used in ships are key indicators for evaluating their comprehensive performance. This paper focuses on a twelve-phase open-winding induction motor (OEW-IM) driven by a three-level H-bridge inverter, and investigates its electromagnetic vibration under current harmonics in the full frequency domain. First, based on the expression of the inverter output current harmonics, the frequency characteristics and spatial orders of the harmonic electromagnetic forces generated by each current harmonic in the full frequency domain are analyzed. Second, a field-circuit coupled simulation model with closed-loop control for the twelve-phase open-winding induction motor system is established. The harmonic electromagnetic forces in the air gap under inverter excitation are computed using finite element analysis. Finally, experimental measurements of the motor winding currents and vibration spectra are carried out to verify the theoretical analysis and the field-circuit coupled model. This study provides theoretical support for vibration prediction and the formulation of active suppression strategies for inverter-driven polyphase motors.</p>

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Electromagnetic vibration modeling of twelve-phase open-end winding induction motors

  • 期刊论文

  • 发表日期：

    2026年3月24日

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  • Qijie Long,
  • Liangdeng Hu,
  • Weier Zou,
  • Shuo Lei,
  • Xiaosong Xu,
  • Bowen Ji,
  • Xiangyu Luo

摘要

The vibration and noise of polyphase motors used in ships are key indicators for evaluating their comprehensive performance. This paper focuses on a twelve-phase open-winding induction motor (OEW-IM) driven by a three-level H-bridge inverter, and investigates its electromagnetic vibration under current harmonics in the full frequency domain. First, based on the expression of the inverter output current harmonics, the frequency characteristics and spatial orders of the harmonic electromagnetic forces generated by each current harmonic in the full frequency domain are analyzed. Second, a field-circuit coupled simulation model with closed-loop control for the twelve-phase open-winding induction motor system is established. The harmonic electromagnetic forces in the air gap under inverter excitation are computed using finite element analysis. Finally, experimental measurements of the motor winding currents and vibration spectra are carried out to verify the theoretical analysis and the field-circuit coupled model. This study provides theoretical support for vibration prediction and the formulation of active suppression strategies for inverter-driven polyphase motors.