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<p>To address the problem of platform vibration caused by inertial recoil forces during the motion of traditional permanent magnet linear synchronous motors (PMLSMs) with fixed stators, this paper proposes a motion control platform based on a floating stator along with a composite control strategy. A mathematical model of the floating stator platform is established, followed by magnetic field and thrust analysis. To mitigate the influence of magnetic field variations induced by the stator’s floating motion on the mover’s operation, an electrical angle compensation method is introduced based on conventional field-oriented control (FOC), ensuring stable motion of the mover. In addition, a perturbation observer is incorporated to compensate for control current disturbances caused by stator floating, thereby reducing the impact of system uncertainties on servo performance. Experimental results demonstrate that electrical angle compensation significantly reduces current and speed fluctuations at 500&#xa0;mm/s. Under a 20-mm stator offset disturbance, the combined use of electrical angle compensation and the perturbation observer significantly enhances system stability and disturbance rejection capability, ensuring reliable and precise motion control of the PMLSM platform and strong robustness in highly dynamic scenarios.</p>

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Research on permanent magnet linear synchronous motor platform control technology based on floating stator

  • 期刊论文

  • 发表日期：

    2026年1月9日

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  • Chuanjiang Li,
  • Bo Hu,
  • Ziyi Li,
  • Yanfei Zhu,
  • Zheng Fang,
  • Ya Gu

摘要

To address the problem of platform vibration caused by inertial recoil forces during the motion of traditional permanent magnet linear synchronous motors (PMLSMs) with fixed stators, this paper proposes a motion control platform based on a floating stator along with a composite control strategy. A mathematical model of the floating stator platform is established, followed by magnetic field and thrust analysis. To mitigate the influence of magnetic field variations induced by the stator’s floating motion on the mover’s operation, an electrical angle compensation method is introduced based on conventional field-oriented control (FOC), ensuring stable motion of the mover. In addition, a perturbation observer is incorporated to compensate for control current disturbances caused by stator floating, thereby reducing the impact of system uncertainties on servo performance. Experimental results demonstrate that electrical angle compensation significantly reduces current and speed fluctuations at 500 mm/s. Under a 20-mm stator offset disturbance, the combined use of electrical angle compensation and the perturbation observer significantly enhances system stability and disturbance rejection capability, ensuring reliable and precise motion control of the PMLSM platform and strong robustness in highly dynamic scenarios.