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Design and Analysis of a Bearing-Integrated Rotary Transformer

Author

Listed:
  • Xiaoou Fan

    (School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China)

  • Shaohua Ma

    (School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China)

  • Dezhi Chen

    (School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China)

  • Chaoqun Liu

    (School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China)

Abstract
In this paper, a bearing- and transformer-integrated electric excitation synchronous motor excitation system (bearing-integrated rotary transformer) is proposed to support the motor rotor and energy transmission of excitation systems. Firstly, the working principle of the bearing-integrated rotary transformer is discussed. Secondly, the structure and electromagnetism of the bearing-integrated rotary transformer are designed through the processes and principles of pole slot matching, stator/rotor size, winding, and the magnetic regulating needle. Thirdly, the bearing-integrated rotary transformer undergoes an electromagnetic–thermal simulation. Finally, a prototype of the bearing-integrated rotary transformer is manufactured, and the electromagnetic and transmission characteristics are tested, verifying the correctness of the proposed scheme and providing additional ideas for the improvement of synchronous motor excitation systems.

Suggested Citation

  • Xiaoou Fan & Shaohua Ma & Dezhi Chen & Chaoqun Liu, 2025. "Design and Analysis of a Bearing-Integrated Rotary Transformer," Energies, MDPI, vol. 18(15), pages 1-21, July.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:15:p:3991-:d:1710416
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