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Design and Analysis of Dual-Rotor Modular-Stator Hybrid-Excited Axial-Flux Permanent Magnet Vernier Machine

Author

Listed:
  • Lun Jia

    (School of Electrical Engineering, Southeast University, Nanjing 210096, China)

  • Mingyao Lin

    (School of Electrical Engineering, Southeast University, Nanjing 210096, China)

  • Keman Lin

    (College of Energy and Electrical Engineering, Hohai University, Nanjing 210098, China)

  • Wei Le

    (School of Electrical Engineering, Southeast University, Nanjing 210096, China)

  • Anchen Yang

    (School of Electrical Engineering, Southeast University, Nanjing 210096, China)

Abstract

This paper proposes a new structure of the dual-rotor hybrid-excited axial-flux permanent magnet vernier machine (DR-HEAFPMVM) with the modular stator and the consequent-pole PM (CPM) rotor for low-speed, high torque density applications such as in-wheel electric vehicles. The tooth-wound non-overlapping armature windings and direct current (DC) excitation windings are, respectively, arranged in stator main-teeth and split-teeth to obtain the modulated and adjustable air-gap flux densities, resulting in high torque density and outstanding flux-weakening capability. First, the design considerations, operation principles, and air-gap flux density distributions of the proposed machine are elaborated based on the air-gap permeance function. Then, the influence of the pole ratios (PRs) and the DC excitation currents on the main electromagnetic performances of the DR-HEAFPMVM, such as the flux-weakening capability and back-electromotive force (back-EMF), on-load electromagnetic torque, loss distribution, and efficiencies, is investigated using the 3-D finite-element method (FEM). Results verify the feasibility of the flux adjustment of the DC excitation windings equipped in the split-tooth, and the design with a pole ratio of 8/1 tends to have higher torque density, higher machine efficiency, and considerable flux-weakening capability compared with the other two PRs.

Suggested Citation

  • Lun Jia & Mingyao Lin & Keman Lin & Wei Le & Anchen Yang, 2022. "Design and Analysis of Dual-Rotor Modular-Stator Hybrid-Excited Axial-Flux Permanent Magnet Vernier Machine," Energies, MDPI, vol. 15(4), pages 1-13, February.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:4:p:1458-:d:751164
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    References listed on IDEAS

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    1. Abdalla Hussein Mohamed & Ahmed Hemeida & Hendrik Vansompel & Peter Sergeant, 2018. "Parametric Studies for Combined Convective and Conductive Heat Transfer for YASA Axial Flux Permanent Magnet Synchronous Machines," Energies, MDPI, vol. 11(11), pages 1-18, November.
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