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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

Author

Listed:
  • Soo-Hwan Park

    (Department of Automotive Engineering, Hanyang University, Seoul 04763, Korea)

  • Eui-Chun Lee

    (Department of Automotive Engineering, Hanyang University, Seoul 04763, Korea
    Safety System R&D Group, Korea Institute of Industrial Technology, Daegu 42994, Korea)

  • Gi-Ju Lee

    (Safety System R&D Group, Korea Institute of Industrial Technology, Daegu 42994, Korea
    Department of Electrical Engineering, Kyungpook National University, Daegu 41566, Korea)

  • Soon-O. Kwon

    (Safety System R&D Group, Korea Institute of Industrial Technology, Daegu 42994, Korea)

  • Myung-Seop Lim

    (Department of Automotive Engineering, Hanyang University, Seoul 04763, Korea)

Abstract

This paper proposes a design guideline for selecting the pole and slot combination of an outer-rotor permanent magnet synchronous motor (PMSM) using a maximum slot occupation (MSO) coil. Because the MSO coil has a large conductor area, the AC Joule loss in the conductors may be increased at high frequencies. To ensure high-efficiency for the PMSM, it is necessary to reduce the loss. Thus, it is important to select the pole- and slot- combination that has the minimum AC Joule loss. The loss is caused by skin/proximity effects and variations in the slot leakage flux. The skin effect is due to the armature winding and the variation in the slot leakage flux is due to the field flux. A method for separating the AC Joule loss due to each component using the frozen permeability method is proposed. Based on the proposed method, the effect of each cause on the loss at various pole- and slot- combinations is analyzed in this study.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:11:p:3073-:d:561924
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    References listed on IDEAS

    as
    1. 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.
    2. Shumei Cui & Tianxu Zhao & Bochao Du & Yuan Cheng, 2020. "Multiphase PMSM with Asymmetric Windings for Electric Drive," Energies, MDPI, vol. 13(15), pages 1-16, July.
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