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Cogging Torque Reduction and Offset of Dual-Rotor Interior Permanent Magnet Motor in Electric Vehicle Traction Platforms

Author

Listed:
  • Myeong-Hwan Hwang

    (Department of Electrical Engineering, Chonnam National University, 77 Youngbong-ro, Buk-gu, Gwangju 61186, Korea)

  • Hae-Sol Lee

    (EV Components & Materials R&D Group, Korea Institute of Industrial Technology, 6 Cheomdan-gwagiro 208 beon-gil, Buk-gu, Gwangju 61012, Korea
    Robotics and Virtual Engineering, Korea University of Science and Technology, Daejeon 34113, Korea)

  • Se-Hyeon Yang

    (EV Components & Materials R&D Group, Korea Institute of Industrial Technology, 6 Cheomdan-gwagiro 208 beon-gil, Buk-gu, Gwangju 61012, Korea
    Department of Mechanical Engineering, Chonnam National University, 77 Youngbong-ro, Buk-gu, Gwangju 61186, Korea)

  • Gye-Seong Lee

    (EV Components & Materials R&D Group, Korea Institute of Industrial Technology, 6 Cheomdan-gwagiro 208 beon-gil, Buk-gu, Gwangju 61012, Korea
    Robotics and Virtual Engineering, Korea University of Science and Technology, Daejeon 34113, Korea)

  • Jong-Ho Han

    (EV Components & Materials R&D Group, Korea Institute of Industrial Technology, 6 Cheomdan-gwagiro 208 beon-gil, Buk-gu, Gwangju 61012, Korea)

  • Dong-Hyun Kim

    (Department of Electrical Engineering, Chonnam National University, 77 Youngbong-ro, Buk-gu, Gwangju 61186, Korea
    EV Components & Materials R&D Group, Korea Institute of Industrial Technology, 6 Cheomdan-gwagiro 208 beon-gil, Buk-gu, Gwangju 61012, Korea)

  • Hyeon-Woo Kim

    (EV Components & Materials R&D Group, Korea Institute of Industrial Technology, 6 Cheomdan-gwagiro 208 beon-gil, Buk-gu, Gwangju 61012, Korea)

  • Hyun-Rok Cha

    (EV Components & Materials R&D Group, Korea Institute of Industrial Technology, 6 Cheomdan-gwagiro 208 beon-gil, Buk-gu, Gwangju 61012, Korea)

Abstract

Recently, various methods have been proposed to increase the output power density of a driving motor applied to an electric vehicle. One such method is to design a structure with two motor rotors. High output density can be obtained by applying the dual rotor to the motor. However, this increases the cogging torque, which can cause high noise and vibration. In this paper, we proposed a method for reducing the cogging torque by adjusting the angle between the magnet and the dual rotor, as well as a novel method for reducing the cogging torque by angular adjustment of the slot opening based on electromagnetic field analysis. In addition, the design was implemented by applying a split core to increase the ease of manufacturing and the dot rate in the motor. We believe that high cogging torque, which is a disadvantage of dual rotor motors, can be lowered by the methods proposed in this paper. The results of this study are expected to be applicable to electric vehicles that require high output power density.

Suggested Citation

  • Myeong-Hwan Hwang & Hae-Sol Lee & Se-Hyeon Yang & Gye-Seong Lee & Jong-Ho Han & Dong-Hyun Kim & Hyeon-Woo Kim & Hyun-Rok Cha, 2019. "Cogging Torque Reduction and Offset of Dual-Rotor Interior Permanent Magnet Motor in Electric Vehicle Traction Platforms," Energies, MDPI, vol. 12(9), pages 1-14, May.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:9:p:1761-:d:229707
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    Citations

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    Cited by:

    1. Ting Yang & Takahiro Kawaguchi & Seiji Hashimoto & Wei Jiang, 2020. "Switching Sequence Model Predictive Direct Torque Control of IPMSMs for EVs in Switch Open-Circuit Fault-Tolerant Mode," Energies, MDPI, vol. 13(21), pages 1-15, October.
    2. Minhyeok Lee & Yunkyung Hwang & Kwanghee Nam, 2021. "Torque Ripple Minimizing of Uniform Slot Machines with Delta Rotor via Subdomain Analysis," Energies, MDPI, vol. 14(21), pages 1-18, November.

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