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Research on a Limit Analytical Method for a Low-Speed Micro Permanent Magnet Torque Motor with Back Winding

Author

Listed:
  • Shuangshuang Guo

    (School of Electrical and Electronic Engineering, Shandong University of Technology, Zibo 255000, China)

  • Bo Zhao

    (School of Electrical and Electronic Engineering, Shandong University of Technology, Zibo 255000, China)

  • Cunshan Zhang

    (School of Electrical and Electronic Engineering, Shandong University of Technology, Zibo 255000, China)

  • Binglin Lu

    (School of Electrical and Electronic Engineering, Shandong University of Technology, Zibo 255000, China)

  • Yukang Chu

    (Shandong Shanbo Electric Machine Group Co., Ltd., Zibo 255000, China)

  • Peng Yang

    (Shandong Shanbo Electric Machine Group Co., Ltd., Zibo 255000, China)

Abstract

The conventional permanent magnet torque motor (PMTM) is slotted on the inner surface of the stator core. When the size of the stator core is small, the winding coils are difficult to embed into the slots. To solve the problem, a novel PMTM is presented, which is slotted on the outer surface of the stator core. As a result, the winding coils can be conveniently embedded into the slots from the outer surface of the stator core. The novel structure of the PMTM with back winding (BWPMTM) is introduced, and the advantage of the novel structure is analyzed. Furthermore, this paper proposes a limit analytical method to solve the optimal parameters of the motor which comprehensively considers four constraints: no-load back electromotive force (EMF), torque, temperature and slot space factor. The optimal parameters of the motor are directly solved to maximize torque density within the constrained range. This method avoids repeated iterative processes and greatly reduces the amount of calculation for PMTM design. Electromagnetic performance and thermal performance are analyzed based on the finite element model (FEM). Finally, the building of a prototype and the experimental results obtained with it are discussed. The rationality of the novel structure and the limit analytical method are verified.

Suggested Citation

  • Shuangshuang Guo & Bo Zhao & Cunshan Zhang & Binglin Lu & Yukang Chu & Peng Yang, 2022. "Research on a Limit Analytical Method for a Low-Speed Micro Permanent Magnet Torque Motor with Back Winding," Energies, MDPI, vol. 15(13), pages 1-20, June.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:13:p:4662-:d:847848
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    References listed on IDEAS

    as
    1. Wenping Chai & Thomas A. Lipo & Byung-il Kwon, 2018. "Design and Optimization of a Novel Wound Field Synchronous Machine for Torque Performance Enhancement," Energies, MDPI, vol. 11(8), pages 1-15, August.
    2. Caixia Gao & Mengzhen Gao & Jikai Si & Yihua Hu & Chun Gan, 2019. "A Novel Direct-Drive Permanent Magnet Synchronous Motor with Toroidal Windings," Energies, MDPI, vol. 12(3), pages 1-14, January.
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