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<p>As the core component of electric vehicles (EVs), the integrated electric drive system determines key vehicle performance indicators including power output characteristics, driving range, and noise, vibration, and harshness (NVH). Due to its inherent strong electromechanical coupling nonlinearities, the system exhibits complex coupled vibration phenomena, which significantly increases the difficulty of vibration suppression. This study thoroughly reveals the mechanisms underlying unbalanced magnetic pull (UMP) and harmonic torque ripple generation in permanent magnet synchronous motors (PMSMs), and proposes a quasi proportional integral resonance (QPIR) strategy based on harmonic current closed-loop control. A coupled dynamic model is established, incorporating UMP, electromagnetic nonlinearities, inverter nonlinearities, and gear transmission meshing nonlinearities of PMSMs. The dynamic model of the gear transmission system is experimentally validated. The results demonstrate that: (1) UMP reduces local natural frequencies of the system by 9.03–52.45%; (2) Significant coupling exists between torque ripple and transmission system nonlinearities; (3) The proposed composite suppression strategy effectively attenuates both harmonic torque ripple and mechanical vibration excitations simultaneously, thereby enhancing the operational stability of the integrated electric drive system.</p>

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Electromagnetic vibration mechanisms and suppression strategies for permanent magnet synchronous motors in integrated electric drive systems

  • 期刊论文

  • 发表日期：

    2026年2月11日

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  • Yanqing Tie,
  • Xiaopeng Li,
  • Haozhe Wang,
  • Xuedong Li,
  • Bing Shi

摘要

As the core component of electric vehicles (EVs), the integrated electric drive system determines key vehicle performance indicators including power output characteristics, driving range, and noise, vibration, and harshness (NVH). Due to its inherent strong electromechanical coupling nonlinearities, the system exhibits complex coupled vibration phenomena, which significantly increases the difficulty of vibration suppression. This study thoroughly reveals the mechanisms underlying unbalanced magnetic pull (UMP) and harmonic torque ripple generation in permanent magnet synchronous motors (PMSMs), and proposes a quasi proportional integral resonance (QPIR) strategy based on harmonic current closed-loop control. A coupled dynamic model is established, incorporating UMP, electromagnetic nonlinearities, inverter nonlinearities, and gear transmission meshing nonlinearities of PMSMs. The dynamic model of the gear transmission system is experimentally validated. The results demonstrate that: (1) UMP reduces local natural frequencies of the system by 9.03–52.45%; (2) Significant coupling exists between torque ripple and transmission system nonlinearities; (3) The proposed composite suppression strategy effectively attenuates both harmonic torque ripple and mechanical vibration excitations simultaneously, thereby enhancing the operational stability of the integrated electric drive system.