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<p>The high-speed maglev Linear Synchronous Motor (LSM) is a salient motor that suffers from the cross-coupling effect between the <i>dq</i>-axis currents, reducing the output performance of the traction power supply system. However, the traditional complex vector current decoupling control method is limited to non-salient motors, which requires strict PI controller parameters tuning. To address the above restrictions, an improved complex vector decoupling control (ICVDC) is proposed for maglev LSM. The improved complex vector decoupling control model is derived from the analysis of the complex vector model of LSM. By introducing the compensation factors, the cross-coupling terms are effectively eliminated, thereby improving the decoupling performance and enhancing robustness of the system. Then, the current decoupling performance of the proposed scheme is analyzed with the Bode plots of the cross-coupling transfer functions. Finally, the effectiveness of the proposed method is verified by a proportionally scaled high-speed maglev LSM experimental platform. The comparative simulation and experimental results demonstrate that the proposed scheme not only achieves better current decoupling, but also significantly improves dynamic response and robustness.</p>

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Enhanced Decoupling Control for High-Speed Maglev Linear Synchronous Motor Using Complex Vector with Compensation Factors

  • 期刊论文

  • 发表日期：

    2025年9月18日

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  • Yuanzhe Zhao,
  • Zhaowei Ren,
  • Guobin Lin,
  • Sizhe Ren,
  • Huan Wang,
  • Zhiqiang Zhang,
  • Linjie Ren

摘要

The high-speed maglev Linear Synchronous Motor (LSM) is a salient motor that suffers from the cross-coupling effect between the dq-axis currents, reducing the output performance of the traction power supply system. However, the traditional complex vector current decoupling control method is limited to non-salient motors, which requires strict PI controller parameters tuning. To address the above restrictions, an improved complex vector decoupling control (ICVDC) is proposed for maglev LSM. The improved complex vector decoupling control model is derived from the analysis of the complex vector model of LSM. By introducing the compensation factors, the cross-coupling terms are effectively eliminated, thereby improving the decoupling performance and enhancing robustness of the system. Then, the current decoupling performance of the proposed scheme is analyzed with the Bode plots of the cross-coupling transfer functions. Finally, the effectiveness of the proposed method is verified by a proportionally scaled high-speed maglev LSM experimental platform. The comparative simulation and experimental results demonstrate that the proposed scheme not only achieves better current decoupling, but also significantly improves dynamic response and robustness.