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Design and analysis of a two-phase brushless DC motor with hybrid permanent magnet material for only-pull drive technique

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Abstract

This paper proposes a two-phase radial flux brushless DC motor comprising a rotor decorated with hybrid permanent magnet (PM) material, i.e., rare-earth NdFeB magnets combined with ferrite magnets. The rare-earth NdFeB magnets are used on the surface, and ferrite magnets in the spoke-type configuration. The combined surface and spoke-type topology are used to improve the output torque as well as to protect magnets of different grades against irreversible demagnetization. The motor is operated using the only-pull drive technique, which allows the use of thin magnets in the motor without the effect of irreversible demagnetization. The electromagnetic performance of the proposed motor is compared with those of a two-phase surface-type PM motor and the spoke-type motor, all driven by the only-pull drive technique. Furthermore, the operating point of the ferrite magnets is analyzed using finite element analysis to confirm the demagnetization endurance of the proposed motor.

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Acknowledgement

The authors would like to thank Prof. T. A. Lipo (late) for his initial guidance from a technical point of view for this study. Also, the authors thank to Editage (www.editage.co.kr) for English language editing.

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Authors and Affiliations

  1. Department of Electrical Engineering, The University of Lahore, Lahore, Pakistan

    Tanveer Yazdan

  2. Department of Electrical Engineering, Institute of Southern Punjab, Multan, Pakistan

    Muhammad Humza

  3. Department of Electrical Engineering, IBA Sukkur University, Sukkur, Pakistan

    Qasim Ali

  4. Department of Electrical Engineering, University of Management and Technology, Lahore, Pakistan

    Asif Hussain

  5. Department of Electronic Systems Engineering, Hanyang University, Ansan-si, South Korea

    Byung-il Kwon

Authors
  1. Tanveer Yazdan
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  2. Muhammad Humza
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  3. Qasim Ali
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  4. Asif Hussain
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  5. Byung-il Kwon
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Corresponding author

Correspondence to Byung-il Kwon.

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Yazdan, T., Humza, M., Ali, Q. et al. Design and analysis of a two-phase brushless DC motor with hybrid permanent magnet material for only-pull drive technique. Electr Eng 103, 2335–2343 (2021). https://doi.org/10.1007/s00202-020-01200-6

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  • DOI: https://doi.org/10.1007/s00202-020-01200-6

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