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Torque Ripple Reduction of a Novel Modular Arc-Linear Flux-Switching Permanent-Magnet Motor with Rotor Step Skewing

Author

Listed:
  • Xiangdong Liu

    (School of Automation, Beijing Institute of Technology, Beijing 100081, China)

  • Zhongxin Gu

    (School of Automation, Beijing Institute of Technology, Beijing 100081, China)

  • Jing Zhao

    (School of Automation, Beijing Institute of Technology, Beijing 100081, China)

Abstract

A novel modular arc-linear flux-switching permanent-magnet motor (MAL-FSPM) used for scanning system instead of reduction gearboxes and kinematic mechanisms is proposed and researched in this paper by the finite element method (FEM). The MAL-FSPM combines characteristics of flux-switching permanent-magnet motor and linear motor and can realize the direct driving and limited angular movement. Structure and operation principle of the MAL-FSPM are analyzed. Cogging torque model of the MAL-FSPM is established. The characteristics of cogging torque and torque ripple are investigated for: (1) distance ( d end ) between left end of rotor and left end of stator is more than two rotor tooth pitch (τ p ); and (2) d end is less than two rotor tooth pitch. Cogging torque is an important component of torque ripple and the period ratio of the cogging torque to the back electromotive force (EMF) equals one for the MAL-FSPM before optimization. In order to reduce the torque ripple as much as possible and affect the back EMF as little as possible, influence of period ratio of cogging torque to back EMF on rotor step skewing is investigated. Rotor tooth width and stator slot open width are optimized to increase the period ratio of cogging torque to back EMF. After the optimization, torque ripple is decreased by 79.8% for d end > τ p and torque ripple is decreased by 49.7% for d end < τ p . Finally, 3D FEM model is established to verify the 2D results.

Suggested Citation

  • Xiangdong Liu & Zhongxin Gu & Jing Zhao, 2016. "Torque Ripple Reduction of a Novel Modular Arc-Linear Flux-Switching Permanent-Magnet Motor with Rotor Step Skewing," Energies, MDPI, vol. 9(6), pages 1-17, May.
    • Handle: RePEc:gam:jeners:v:9:y:2016:i:6:p:404-:d:70842
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    References listed on IDEAS

    as
    1. Qiwei Xu & Shumei Cui & Liwei Song & Qianfan Zhang, 2014. "Research on the Power Management Strategy of Hybrid Electric Vehicles Based on Electric Variable Transmissions," Energies, MDPI, vol. 7(2), pages 1-27, February.
    2. Jing Zhao & Yashuang Yan & Bin Li & Xiangdong Liu & Zhen Chen, 2014. "Influence of Different Rotor Teeth Shapes on the Performance of Flux Switching Permanent Magnet Machines Used for Electric Vehicles," Energies, MDPI, vol. 7(12), pages 1-20, December.
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    Cited by:

    1. Xing Liu & Jinhua Du & Deliang Liang, 2016. "Analysis and Speed Ripple Mitigation of a Space Vector Pulse Width Modulation-Based Permanent Magnet Synchronous Motor with a Particle Swarm Optimization Algorithm," Energies, MDPI, vol. 9(11), pages 1-15, November.
    2. Jing Zhao & Yun Zheng & Congcong Zhu & Xiangdong Liu & Bin Li, 2017. "A Novel Modular-Stator Outer-Rotor Flux-Switching Permanent-Magnet Motor," Energies, MDPI, vol. 10(7), pages 1-19, July.
    3. Fangwu Ma & Hongbin Yin & Lulu Wei & Liang Wu & Cansong Gu, 2018. "Analytical Calculation of Armature Reaction Field of the Interior Permanent Magnet Motor," Energies, MDPI, vol. 11(9), pages 1-12, September.
    4. Wenjuan Hao & Yu Wang, 2018. "Comparison of the Stator Step Skewed Structures for Cogging Force Reduction of Linear Flux Switching Permanent Magnet Machines," Energies, MDPI, vol. 11(8), pages 1-14, August.

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