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Thrust Force Ripple Reduction of Two C-Core Linear Flux-Switching Permanent Magnet Machines of High Thrust Force Capability

Author

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  • Wenjuan Hao

    (College of Jincheng, Nanjing University of Aeronautics and Astronautics, Nanjing 211156, China
    Department of Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China)

  • Yu Wang

    (Department of Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China)

Abstract

Linear flux-switching permanent magnetic (LFSPM) machines are good choices for long stroke applications. These machines deliver high thrust force density in addition to the machine structure where permanent magnetics (PMs) and windings are all on the short mover. For LFSPM machines, their performance is always affected by big thrust force ripple. In this paper, for two C-core LFSPM machines of high thrust force capability, including a 6/13 C-core LFSPM (6/13LFSPM-C) machine and a sandwiched C-core LFSPM (SLFSPM-C) machine, and a thrust force ripple reduction method is proposed. The proposed method is developed by reducing the slot effect component of the cogging force based on staggered stator tooth, and suppressing the thrust force ripple caused by unbalanced three phase back-electromagnetic forces (EMFs) based on two end PMs. Based on finite element analysis (FEA) results, both C-core LFSPM machines can achieve small thrust force ripples as well as high sinusoidal back-EMFs, and at the same time, maintain high thrust force capability with the proposed method. It was also found that, the improved SLFSPM-C machine exhibited the same thrust force capability as the improved 6/13LFSPM-C machine, but with a much smaller thrust force ripple.

Suggested Citation

  • Wenjuan Hao & Yu Wang, 2017. "Thrust Force Ripple Reduction of Two C-Core Linear Flux-Switching Permanent Magnet Machines of High Thrust Force Capability," Energies, MDPI, vol. 10(10), pages 1-13, October.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:10:p:1608-:d:115031
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    References listed on IDEAS

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    1. Yi Du & Gang Yang & Li Quan & Xiaoyong Zhu & Feng Xiao & Haoyang Wu, 2017. "Detent Force Reduction of a C-Core Linear Flux-Switching Permanent Magnet Machine with Multiple Additional Teeth," Energies, MDPI, vol. 10(3), pages 1-14, March.
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    Cited by:

    1. Noman Ullah & Abdul Basit & Faisal Khan & Wasiq Ullah & Mohsin Shahzad & Atif Zahid, 2018. "Enhancing Capabilities of Double Sided Linear Flux Switching Permanent Magnet Machines," Energies, MDPI, vol. 11(10), pages 1-21, October.
    2. Wenjuan Hao & Gong Zhang & Wenbo Liu & Hui Liu & Yu Wang, 2022. "Methods for Reducing Cogging Force in Permanent Magnet Machines: A Review," Energies, MDPI, vol. 16(1), pages 1-27, December.
    3. 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.
    4. Himayat Ullah Jan & Faisal Khan & Basharat Ullah & Muhammad Qasim & Ahmad H. Milyani & Abdullah Ahmed Azhari, 2022. "Design and Thermal Analysis of Linear Hybrid Excited Flux Switching Machine Using Ferrite Magnets," Energies, MDPI, vol. 15(14), pages 1-18, July.

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