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Analysis of Influence of the Inner Diameter of the Permanent Magnet on Rotor Stress and Critical Speed for the High Speed Permanent Magnet Motor

Received: 17 October 2018     Published: 18 October 2018
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Abstract

While the rotor of a high-speed permanent magnet motor runs at high speed, it is difficult for the permanent magnet to bear the huge tensile stress which caused by centrifugal force. In addition, the rotor is also prone to vibration and even bending deformation due to resonance. Therefore, the strength and critical speed of the rotor must be analyzed and checked. In this paper, because of the slim characteristic of high speed permanent magnet rotors, the displacement and stress fields of a 150 kW, 30 000 r/min surface mounted high speed permanent magnet motor rotor are deduced based on the theory of the thick-walled cylinder. The finite element method is used to verify the correctness of the analytical calculation. Based on the deduced analytical formulas, the influences of the inner diameter of the permanent magnet and the sleeve material on the rotor stress are analyzed. At the same time, the finite element method is used to calculate the critical speed of the rotor and analysis the influences of the inner diameter of the permanent magnet and the sleeve material on the critical speed of the rotor shaft system. A basis for the design of the high speed permanent magnet motor rotor is given.

Published in Science Discovery (Volume 6, Issue 5)
DOI 10.11648/j.sd.20180605.25
Page(s) 406-413
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2018. Published by Science Publishing Group

Keywords

High Speed Permanent Magnet Motor, Inner Diameter of Permanent Magnet, Stress, Critical Speed

References
[1] 孙权贵,邓智泉,张忠明.基于齿槽效应的高速永磁电机转子涡流损耗解析计算[J].电工技术学报, 2018, 33(9):1994-2004。
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Cite This Article
  • APA Style

    Xu Zhiyu, Deng Zhiquan, Zhang Zhongming, Sun Quangui, Pang Gucai. (2018). Analysis of Influence of the Inner Diameter of the Permanent Magnet on Rotor Stress and Critical Speed for the High Speed Permanent Magnet Motor. Science Discovery, 6(5), 406-413. https://doi.org/10.11648/j.sd.20180605.25

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    ACS Style

    Xu Zhiyu; Deng Zhiquan; Zhang Zhongming; Sun Quangui; Pang Gucai. Analysis of Influence of the Inner Diameter of the Permanent Magnet on Rotor Stress and Critical Speed for the High Speed Permanent Magnet Motor. Sci. Discov. 2018, 6(5), 406-413. doi: 10.11648/j.sd.20180605.25

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    AMA Style

    Xu Zhiyu, Deng Zhiquan, Zhang Zhongming, Sun Quangui, Pang Gucai. Analysis of Influence of the Inner Diameter of the Permanent Magnet on Rotor Stress and Critical Speed for the High Speed Permanent Magnet Motor. Sci Discov. 2018;6(5):406-413. doi: 10.11648/j.sd.20180605.25

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  • @article{10.11648/j.sd.20180605.25,
      author = {Xu Zhiyu and Deng Zhiquan and Zhang Zhongming and Sun Quangui and Pang Gucai},
      title = {Analysis of Influence of the Inner Diameter of the Permanent Magnet on Rotor Stress and Critical Speed for the High Speed Permanent Magnet Motor},
      journal = {Science Discovery},
      volume = {6},
      number = {5},
      pages = {406-413},
      doi = {10.11648/j.sd.20180605.25},
      url = {https://doi.org/10.11648/j.sd.20180605.25},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.sd.20180605.25},
      abstract = {While the rotor of a high-speed permanent magnet motor runs at high speed, it is difficult for the permanent magnet to bear the huge tensile stress which caused by centrifugal force. In addition, the rotor is also prone to vibration and even bending deformation due to resonance. Therefore, the strength and critical speed of the rotor must be analyzed and checked. In this paper, because of the slim characteristic of high speed permanent magnet rotors, the displacement and stress fields of a 150 kW, 30 000 r/min surface mounted high speed permanent magnet motor rotor are deduced based on the theory of the thick-walled cylinder. The finite element method is used to verify the correctness of the analytical calculation. Based on the deduced analytical formulas, the influences of the inner diameter of the permanent magnet and the sleeve material on the rotor stress are analyzed. At the same time, the finite element method is used to calculate the critical speed of the rotor and analysis the influences of the inner diameter of the permanent magnet and the sleeve material on the critical speed of the rotor shaft system. A basis for the design of the high speed permanent magnet motor rotor is given.},
     year = {2018}
    }
    

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  • TY  - JOUR
    T1  - Analysis of Influence of the Inner Diameter of the Permanent Magnet on Rotor Stress and Critical Speed for the High Speed Permanent Magnet Motor
    AU  - Xu Zhiyu
    AU  - Deng Zhiquan
    AU  - Zhang Zhongming
    AU  - Sun Quangui
    AU  - Pang Gucai
    Y1  - 2018/10/18
    PY  - 2018
    N1  - https://doi.org/10.11648/j.sd.20180605.25
    DO  - 10.11648/j.sd.20180605.25
    T2  - Science Discovery
    JF  - Science Discovery
    JO  - Science Discovery
    SP  - 406
    EP  - 413
    PB  - Science Publishing Group
    SN  - 2331-0650
    UR  - https://doi.org/10.11648/j.sd.20180605.25
    AB  - While the rotor of a high-speed permanent magnet motor runs at high speed, it is difficult for the permanent magnet to bear the huge tensile stress which caused by centrifugal force. In addition, the rotor is also prone to vibration and even bending deformation due to resonance. Therefore, the strength and critical speed of the rotor must be analyzed and checked. In this paper, because of the slim characteristic of high speed permanent magnet rotors, the displacement and stress fields of a 150 kW, 30 000 r/min surface mounted high speed permanent magnet motor rotor are deduced based on the theory of the thick-walled cylinder. The finite element method is used to verify the correctness of the analytical calculation. Based on the deduced analytical formulas, the influences of the inner diameter of the permanent magnet and the sleeve material on the rotor stress are analyzed. At the same time, the finite element method is used to calculate the critical speed of the rotor and analysis the influences of the inner diameter of the permanent magnet and the sleeve material on the critical speed of the rotor shaft system. A basis for the design of the high speed permanent magnet motor rotor is given.
    VL  - 6
    IS  - 5
    ER  - 

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Author Information
  • Department of Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China

  • Department of Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China

  • Department of Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China

  • Department of Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China

  • Department of Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China

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