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Analysis of Torque Ripple of a Spoke-Type Interior Permanent Magnet Machine

Author

Listed:
  • Guoyu Chu

    (School of Electrical Engineering and Telecommunications, UNSW Sydney, Kensington, NSW 2033, Australia)

  • Rukmi Dutta

    (School of Electrical Engineering and Telecommunications, UNSW Sydney, Kensington, NSW 2033, Australia)

  • Alireza Pouramin

    (School of Electrical Engineering and Telecommunications, UNSW Sydney, Kensington, NSW 2033, Australia)

  • Muhammed Fazlur Rahman

    (School of Electrical Engineering and Telecommunications, UNSW Sydney, Kensington, NSW 2033, Australia)

Abstract

This paper investigates the theoretical reasons behind the low torque ripple of a fractional-slot concentrated-winding (FSCW) spoke-type interior permanent-magnet (IPM) machine obtained via a genetic algorithm-based optimization. To better understand the torque performance of the IPMM, this paper uses the frozen permeability method to segregate the overall torque into four components—magnet torque, reluctance torque, cogging torque, and the torque caused by cross-magnetization. Equations and detailed procedures of the torque separation method are discussed in the paper. Analysis of the separated torque components reveals that the counteraction between ripples of different torques leads to the low torque ripple. At high-load conditions, the magnetic saturation alters the torque ripples caused by cross-magnetization to offset ripples of other components resulting in minimization of the overall torque ripple. A detailed parametric analysis of the geometric parameters was carried out to understand their effect in producing minimum torque ripple in the optimized design. In the end, a prototype was built and used for the verification of the torque separation method and the analytical findings based on it.

Suggested Citation

  • Guoyu Chu & Rukmi Dutta & Alireza Pouramin & Muhammed Fazlur Rahman, 2020. "Analysis of Torque Ripple of a Spoke-Type Interior Permanent Magnet Machine," Energies, MDPI, vol. 13(11), pages 1-16, June.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:11:p:2886-:d:367582
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    References listed on IDEAS

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    1. Ping Zheng & Weinan Wang & Mingqiao Wang & Yong Liu & Zhenxing Fu, 2017. "Investigation of the Magnetic Circuit and Performance of Less-Rare-Earth Interior Permanent-Magnet Synchronous Machines Used for Electric Vehicles," Energies, MDPI, vol. 10(12), pages 1-22, December.
    2. Weiwei Gu & Xiaoyong Zhu & Li Quan & Yi Du, 2015. "Design and Optimization of Permanent Magnet Brushless Machines for Electric Vehicle Applications," Energies, MDPI, vol. 8(12), pages 1-13, December.
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    Cited by:

    1. Hyungkwan Jang & Hyunwoo Kim & Huai-Cong Liu & Ho-Joon Lee & Ju Lee, 2021. "Investigation on the Torque Ripple Reduction Method of a Hybrid Electric Vehicle Motor," Energies, MDPI, vol. 14(5), pages 1-13, March.
    2. Soo-Hwan Park & Eui-Chun Lee & Gi-Ju Lee & Soon-O. Kwon & Myung-Seop Lim, 2021. "Effect of Pole and Slot Combination on the AC Joule Loss of Outer-Rotor Permanent Magnet Synchronous Motors Using a High Fill Factor Machined Coil," Energies, MDPI, vol. 14(11), pages 1-11, May.

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