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Design and Performance Characterization of the E-core Outer-Rotor Hybrid-Excitation Flux Switching Machine

Author

Listed:
  • Zhiyuan Xu

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

  • Ming Cheng

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

Abstract

This paper proposes an E-core outer-rotor hybrid-excitation flux switching (OR-HEFS) machine for in-wheel direct driving application. According to the general air gap field modulation theory, the magneto-motive force (MMF) permeance model was established to investigate the air gap flux density, and then the torque generation, the flux regulation principle, and the excitation-winding-induced voltage of the E-core OR-HEFS machine were analyzed. To characterize the output performances, the influence of the design parameters was investigated for the E-core OR-HEFS machine, including the split ratio, stator tooth arc, PM arc, fault-tolerant tooth arc, rotor tooth arc, stator yoke width and rotor yoke width. The performances contained the output torque, torque ripple, flux regulation ratio, and the excitation-winding-induced voltage. On this basis, the aforementioned four performances were optimized by means of the non-dominated sorting genetic algorithm II (NSGA-II). Based on the optimization result, a prototype was manufactured and tested to verify the whole investigation of this paper.

Suggested Citation

  • Zhiyuan Xu & Ming Cheng, 2025. "Design and Performance Characterization of the E-core Outer-Rotor Hybrid-Excitation Flux Switching Machine," Energies, MDPI, vol. 18(3), pages 1-18, January.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:3:p:629-:d:1579932
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