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<p>Magnetic gears have become a realistic and feasible alternative to traditional mechanical gear-boxes. For enhancing the torque of the coaxial magnetic gear (CMG), an inverted T-shaped non-uniform Halbach array with an auxiliary permanent magnet (PM) and spoke structure CMG is proposed. The inner rotor is an inverted T-shaped PM and an auxiliary PM alternately arranged. The spoke structure is adopted in the outer rotor. To achieve better electromagnetic performance, the structural parameters of the proposed CMG are determined and analyzed using the response surface method (RSM) and multi-objective genetic algorithm (MOGA). Finally, an optimal CsMG topology with 4 inner and 17 outer pole pairs is established. After optimization and calculation by finite element analysis (FEA), the proposed CMG enhances the flux density while diminishing the non-working harmonics, resulting in a 50.78% boost in output torque.</p>

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Analysis and optimization of magnetic gear with inverted T-shaped and spoke structure

  • 期刊论文

  • 发表日期：

    2026年1月26日

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  • Mingji Yin,
  • Libing Jing

摘要

Magnetic gears have become a realistic and feasible alternative to traditional mechanical gear-boxes. For enhancing the torque of the coaxial magnetic gear (CMG), an inverted T-shaped non-uniform Halbach array with an auxiliary permanent magnet (PM) and spoke structure CMG is proposed. The inner rotor is an inverted T-shaped PM and an auxiliary PM alternately arranged. The spoke structure is adopted in the outer rotor. To achieve better electromagnetic performance, the structural parameters of the proposed CMG are determined and analyzed using the response surface method (RSM) and multi-objective genetic algorithm (MOGA). Finally, an optimal CsMG topology with 4 inner and 17 outer pole pairs is established. After optimization and calculation by finite element analysis (FEA), the proposed CMG enhances the flux density while diminishing the non-working harmonics, resulting in a 50.78% boost in output torque.