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<p>Axial magnetic gear compound motors offer high torque density and compactness but still face limitations such as weak modulation capability, low harmonic utilization, and restricted torque output. This paper proposes a novel dual-modulation axial magnetic gear compound motor (MEAMG) featuring a sum–difference flux-modulation ring and an armature stator integrated within the high-speed rotor. The resulting four-layer concentric topology enables simultaneous axial and radial flux paths without increasing machine volume, significantly enhancing flux linkage and torque generation. The MEAMG’s operating principle is analyzed using magnetic field modulation theory, and its electromagnetic performance is evaluated through finite-element modeling. A Box–Behnken design (BBD)-based response surface method is further employed to optimize key structural parameters. Simulation results confirm substantial improvements in no-load back EMF and torque performance, demonstrating the effectiveness of the proposed compact dual-modulation design.</p>

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Performance analysis and optimization of a new dual-modulated magnetic gear composite generator

  • 期刊论文

  • 发表日期：

    2026年4月9日

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  • Ming Chen,
  • Zheng Zheng,
  • Jungang Wang,
  • Rui Na Mo,
  • Shizhao Wang

摘要

Axial magnetic gear compound motors offer high torque density and compactness but still face limitations such as weak modulation capability, low harmonic utilization, and restricted torque output. This paper proposes a novel dual-modulation axial magnetic gear compound motor (MEAMG) featuring a sum–difference flux-modulation ring and an armature stator integrated within the high-speed rotor. The resulting four-layer concentric topology enables simultaneous axial and radial flux paths without increasing machine volume, significantly enhancing flux linkage and torque generation. The MEAMG’s operating principle is analyzed using magnetic field modulation theory, and its electromagnetic performance is evaluated through finite-element modeling. A Box–Behnken design (BBD)-based response surface method is further employed to optimize key structural parameters. Simulation results confirm substantial improvements in no-load back EMF and torque performance, demonstrating the effectiveness of the proposed compact dual-modulation design.