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Influences of Winding MMF Harmonics on Torque Characteristics in Surface-Mounted Permanent Magnet Vernier Machines

Author

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  • Daekyu Jang

    (Mechatronics System Research Laboratory, Electrical Engineering Department, Dong-A University, Busan 52121, Korea)

  • Junghwan Chang

    (Mechatronics System Research Laboratory, Electrical Engineering Department, Dong-A University, Busan 52121, Korea)

Abstract

This paper presents the influences of winding magneto-motive force (MMF) harmonics on the torque characteristics in surface-mounted permanent magnet vernier (SPMV) machines. Based on the magnetic gearing effects, the armature magnetic field of the SPMV machines is modulated by flux modulation poles (FMPs). In the modulated magnetic field, a working harmonic which corresponds to the number of the rotor pole pairs generates torque. Unlike regular PM machines, the winding MMF harmonics in the SPMV machines can produce the working harmonic by adjusting the FMP shapes. In order to investigate the effects of the winding MMF harmonics, the operating principle of the SPMV machines is elaborated by an analytical method using the winding MMF distribution and air-gap permeance function. After that, the design method of the FMP shapes that can improve the output torque by using the winding MMF harmonics is proposed. For the SPMV machine having 6 slots and 24 FMPs, the effects of the winding MMF harmonics and the validity of the proposed design method are confirmed by the finite element analysis method. It is shown that the proposed design method can improve the performances of the SPMV machine in terms of the torque density, induced electromagnetic force, and efficiency.

Suggested Citation

  • Daekyu Jang & Junghwan Chang, 2017. "Influences of Winding MMF Harmonics on Torque Characteristics in Surface-Mounted Permanent Magnet Vernier Machines," Energies, MDPI, vol. 10(4), pages 1-17, April.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:4:p:580-:d:96590
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    References listed on IDEAS

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    1. Hui Yang & Heyun Lin & Zi-Qiang Zhu & Shuhua Fang & Yunkai Huang, 2016. "A Dual-Consequent-Pole Vernier Memory Machine," Energies, MDPI, vol. 9(3), pages 1-15, February.
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    Cited by:

    1. Daekyu Jang & Junghwan Chang, 2017. "A Novel Design Method for the Geometric Shapes of Flux Modulation Poles in the Surface-Mounted Permanent Magnet Vernier Machines," Energies, MDPI, vol. 10(10), pages 1-16, October.
    2. Daekyu Jang & Junghwan Chang, 2019. "Design and Analysis of Surface-Mounted PM Vernier Machines Considering Harmonic Characteristics of Winding MMF," Energies, MDPI, vol. 12(5), pages 1-10, March.
    3. Fei Zhao & Mengzhu Cao & Encheng Tao & Liyi Li, 2021. "Design and Analysis of a Permanent Magnet Vernier Machine with Non-Uniform Tooth Distribution," Energies, MDPI, vol. 14(22), pages 1-16, November.
    4. Yujun Shi & Linni Jian, 2018. "A Novel Dual-Permanent-Magnet-Excited Machine with Flux Strengthening Effect for Low-Speed Large-Torque Applications," Energies, MDPI, vol. 11(1), pages 1-17, January.
    5. Anto Anbarasu Yesudhas & Young Hoon Joo & Seong Ryong Lee, 2022. "Reference Model Adaptive Control Scheme on PMVG-Based WECS for MPPT under a Real Wind Speed," Energies, MDPI, vol. 15(9), pages 1-17, April.

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