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Field-Weakening Performance Improvement of the Yokeless and Segmented Armature Axial Flux Motor for Electric Vehicles

Author

Listed:
  • Xiaoyuan Wang

    (School of Electrical and Information Engineering, Tianjin University, No. 92 Weijin Road, Tianjin 300072, China)

  • Sijia Xu

    (School of Electrical and Information Engineering, Tianjin University, No. 92 Weijin Road, Tianjin 300072, China)

  • Chunpeng Li

    (School of Electrical and Information Engineering, Tianjin University, No. 92 Weijin Road, Tianjin 300072, China)

  • Xiang Li

    (School of Electrical and Information Engineering, Tianjin University, No. 92 Weijin Road, Tianjin 300072, China)

Abstract

In order to avoid the unsafe operation and raise efficiency of yokeless and segmented armature axial flux motors at high speed, the control current of air gap flux is expected to be as small as possible with the same field-weakening effect. To reduce the control complexity, a new structure of module poles with a combination of permanent magnet and soft magnetic material is proposed, which has the characteristics of lower d -axis reluctance and a higher performance of yokeless and segmented armature axial flux motor with surface mounted permanent magnet. According to finite element analysis (FEA), the flux distributions of a rotor pole in no-load and demagnetization condition are contrasted, and under this new configuration, the derivative analytical models of back electromotive-force (EMF), electromagnetic torque, and air gap flux are validated, moreover, the influence of soft magnetic material of rotor poles on controlling the air gap flux is investigated in different load. Based on a particular objective function, the combination of permanent magnet and soft magnetic material is optimized. The results show that optimal solution of field-weakening performance of yokeless and segmented armature axial flux motors can be improved effectively and legitimately.

Suggested Citation

  • Xiaoyuan Wang & Sijia Xu & Chunpeng Li & Xiang Li, 2017. "Field-Weakening Performance Improvement of the Yokeless and Segmented Armature Axial Flux Motor for Electric Vehicles," Energies, MDPI, vol. 10(10), pages 1-12, September.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:10:p:1492-:d:113248
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    References listed on IDEAS

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    1. Joya C. Kappatou & Georgios D. Zalokostas & Dimitrios A. Spyratos, 2017. "3-D FEM Analysis, Prototyping and Tests of an Axial Flux Permanent-Magnet Wind Generator," Energies, MDPI, vol. 10(9), pages 1-14, August.
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    Cited by:

    1. Huimin Li & Shoudao Huang & Derong Luo & Jian Gao & Peng Fan, 2018. "Dynamic DC-link Voltage Adjustment for Electric Vehicles Considering the Cross Saturation Effects," Energies, MDPI, vol. 11(8), pages 1-22, August.
    2. Kai Xu & Youguang Guo & Gang Lei & Jianguo Zhu, 2023. "A Review of Flywheel Energy Storage System Technologies," Energies, MDPI, vol. 16(18), pages 1-32, September.
    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. Feng Chai & Yunlong Bi & Yulong Pei, 2017. "Magnet Shape Optimization of Two-Layer Spoke-Type Axial Flux Interior Permanent Magnet Machines," Energies, MDPI, vol. 11(1), pages 1-14, December.

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