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General Principles of Combinations of Stator Poles and Rotor Teeth for Conventional Flux-Switching Brushless Machines with Prime Phase Numbers

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Listed:
  • Chuhan Gao

    (School of Electrical Engineering, Southeast University, Nanjing 210096, China
    These authors contributed equally to this work.)

  • Xinran Jia

    (School of Electrical Engineering, Southeast University, Nanjing 210096, China
    These authors contributed equally to this work.)

  • Guishu Zhao

    (School of Electrical Engineering & Automation Engineering, Nanjing Normal University, Nanjing 210023, China)

  • Wei Hua

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

  • Ming Cheng

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

Abstract

In order to achieve the optimal stator–rotor combinations of conventional flux-switching permanent magnet (FSPM) machines, this paper proposes and analyzes a general principle with prime phase numbers. Based on the coil complementarity concept, the proposed methodology specifically addresses the phase symmetry of back electromotive force (back-EMF) and electromagnetic torque optimization, with comprehensive analysis conducted for two-phase, three-phase, and five-phase configurations. Firstly, the coil-EMF vectors and the concept of coil pairs of conventional FSPM machines are introduced. Then, based on the coil-EMF vectors, an analytical model determining the stator pole and rotor teeth combinations is proposed. Further, the combinations for conventional FSPM machines with prime phase numbers are synthesized and summarized on the basis of the results obtained by the proposed model. To validate the model and combination principles, the FSPM machines satisfying the principles have been verified to exhibit a symmetrical phase back-EMF waveform by finite element analysis (FEA) and experiments on prototypes. In addition, the winding factors of the conventional FSPM machines with different stator pole and rotor teeth combinations are calculated.

Suggested Citation

  • Chuhan Gao & Xinran Jia & Guishu Zhao & Wei Hua & Ming Cheng, 2025. "General Principles of Combinations of Stator Poles and Rotor Teeth for Conventional Flux-Switching Brushless Machines with Prime Phase Numbers," Energies, MDPI, vol. 18(13), pages 1-19, June.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:13:p:3322-:d:1686582
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    References listed on IDEAS

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    1. Chainattapol Nissayan & Pattasad Seangwong & Supanat Chamchuen & Nuwantha Fernando & Apirat Siritaratiwat & Pirat Khunkitti, 2022. "Modeling and Optimal Configuration Design of Flux-Barrier for Torque Improvement of Rotor Flux Switching Permanent Magnet Machine," Energies, MDPI, vol. 15(22), pages 1-12, November.
    2. Mohammadreza Mamashli & Mohsin Jamil, 2025. "Enhanced Dynamic Control for Flux-Switching Permanent Magnet Machines Using Integrated Model Predictive Current Control and Sliding Mode Control," Energies, MDPI, vol. 18(5), pages 1-25, February.
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