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Characteristics Analysis of Doubly Fed Magnetic Geared Motor Considering Winding Frequency Conditions

Author

Listed:
  • Homin Shin

    (Mechatronics System Research Lab., Department of Electrical Engineering, Dong-A University, Saha-gu, Busan 49315, Korea)

  • Junghwan Chang

    (Mechatronics System Research Lab., Department of Electrical Engineering, Dong-A University, Saha-gu, Busan 49315, Korea)

Abstract

The magnetic geared motor, which has improved torque density because of the magnetic gearing effect, has been researched. However, its narrow operating region due to the operating mechanism by the magnetic gearing effect and field flux by the PM is a challenge that needs to be overcome. Whereas, the doubly fed magnetic geared motor (DFMGM) can extend the operating region because of the double stator and double winding structure with the individual frequency control of the current fed to the inner and outer windings. However, two rotating magnetic fields, which are produced by the inner and outer winding flux, exist at the air-gap, and the large numbers of space harmonic components of the modulated flux density are produced at the air-gaps. These space harmonic components, which are produced by the winding MMF, influence not only the back-EMF of the winding but also the performances of the operating torque. Besides, the inner and outer windings affect each other in the back-EMF, and its characteristics appears differently in the inner and outer windings. Thus, in this paper, the structure, operating strategy, and basic characteristics according to the frequency condition in the inner and outer windings are presented.

Suggested Citation

  • Homin Shin & Junghwan Chang, 2018. "Characteristics Analysis of Doubly Fed Magnetic Geared Motor Considering Winding Frequency Conditions," Energies, MDPI, vol. 11(10), pages 1-16, September.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:10:p:2564-:d:172110
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    References listed on IDEAS

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    1. Xinhua Guo & Shaozhe Wu & Weinong Fu & Yulong Liu & Yunchong Wang & Peihuang Zeng, 2016. "Control of a Dual-Stator Flux-Modulated Motor for Electric Vehicles," Energies, MDPI, vol. 9(7), pages 1-19, July.
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