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<p>To solve the problems of serious corrosion, dry lubrication, and increased operating resistance associated with worm gear or screw-nut reduction devices for high-voltage isolation switches, a coaxial magnetic gear (CMG) transmission device with coding-shaped teeth is proposed to replace traditional worm gear or screw-nut reduction devices. The modulation bulk of the proposed model adopts a coding-shaped teeth structure, and the permanent magnets (PMs) adopt a bread shaped magnetization method. This structure reduces non-working harmonics and increases working harmonics. A parameterized model of the proposed CMG with coding-shaped teeth was established using the finite element method, and optimized and analyzed through the sensitivity coefficient, response surface method (RSM), and multi-objective genetic algorithm (MOGA). Finally, the air gap magnetic flux density, torque, and torque ripple of the CMG are calculated. Compared with conventional CMGs, the CMG with coding-shaped teeth has higher torque density and lower output torque ripple. It can be applied to the reliable opening and closing of high-voltage isolation switches.</p>

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Analysis of coaxial magnetic gears with coding-shaped teeth for isolation switch operating mechanisms

  • 期刊论文

  • 发表日期：

    2026年2月25日

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  • Weizhao Tang,
  • Shichen Fu,
  • Siting Zhang,
  • Libing Jing

摘要

To solve the problems of serious corrosion, dry lubrication, and increased operating resistance associated with worm gear or screw-nut reduction devices for high-voltage isolation switches, a coaxial magnetic gear (CMG) transmission device with coding-shaped teeth is proposed to replace traditional worm gear or screw-nut reduction devices. The modulation bulk of the proposed model adopts a coding-shaped teeth structure, and the permanent magnets (PMs) adopt a bread shaped magnetization method. This structure reduces non-working harmonics and increases working harmonics. A parameterized model of the proposed CMG with coding-shaped teeth was established using the finite element method, and optimized and analyzed through the sensitivity coefficient, response surface method (RSM), and multi-objective genetic algorithm (MOGA). Finally, the air gap magnetic flux density, torque, and torque ripple of the CMG are calculated. Compared with conventional CMGs, the CMG with coding-shaped teeth has higher torque density and lower output torque ripple. It can be applied to the reliable opening and closing of high-voltage isolation switches.