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Modified Slot Opening for Reducing Shaft-to-Frame Voltage of AC Motors

Author

Listed:
  • Manje Yea

    (School of Electrical and Computer Engineering, Ulsan National Institute of Science and Technology, Ulsan 44919, Korea)

  • Ki Jin Han

    (Division of Electronics and Electrical Engineering, Dongguk University, Seoul 04620, Korea)

Abstract

This paper presents a method to reduce the winding-to-rotor capacitance of electrical machines for the purpose of suppressing shaft-to-frame voltage, which causes reliability issues, such as electromagnetic interference (EMI) and bearing current. The proposed method is based on the modification of slot opening shape of the stator core, including the variation of slot opening width and the use of oblique slot opening. For the verification of the suggested method, six different slot opening shapes, including a reference design, are analyzed and compared using finite element analysis, and the results show that the proposed method can reduce the shaft-to-frame voltage by 98%, compared to the reference design.

Suggested Citation

  • Manje Yea & Ki Jin Han, 2020. "Modified Slot Opening for Reducing Shaft-to-Frame Voltage of AC Motors," Energies, MDPI, vol. 13(3), pages 1-9, February.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:3:p:760-:d:318401
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    References listed on IDEAS

    as
    1. Chengde Tong & Zhiyi Song & Jingang Bai & Jiaqi Liu & Ping Zheng, 2016. "Analytical Investigation of the Magnetic-Field Distribution in an Axial Magnetic-Field-Modulated Brushless Double-Rotor Machine," Energies, MDPI, vol. 9(8), pages 1-23, July.
    2. Ruifang Liu & Xin Ma & Xuejiao Ren & Junci Cao & Shuangxia Niu, 2018. "Comparative Analysis of Bearing Current in Wind Turbine Generators," Energies, MDPI, vol. 11(5), pages 1-13, May.
    3. Xuejiao Ren & Ruifang Liu & Erle Yang, 2019. "Modelling of the Bearing Breakdown Resistance in Bearing Currents Problem of AC Motors," Energies, MDPI, vol. 12(6), pages 1-9, March.
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    Cited by:

    1. Sebastian Berhausen & Tomasz Jarek, 2022. "Analysis of Impact of Design Solutions of an Electric Machine with Permanent Magnets for Bearing Voltages with Inverter Power Supply," Energies, MDPI, vol. 15(12), pages 1-19, June.
    2. Muhammad Usman Sardar & Toomas Vaimann & Lauri Kütt & Ants Kallaste & Bilal Asad & Siddique Akbar & Karolina Kudelina, 2023. "Inverter-Fed Motor Drive System: A Systematic Analysis of Condition Monitoring and Practical Diagnostic Techniques," Energies, MDPI, vol. 16(15), pages 1-41, July.
    3. Sebastian Berhausen & Tomasz Jarek & Petr Orság, 2022. "Influence of the Shielding Winding on the Bearing Voltage in a Permanent Magnet Synchronous Machine," Energies, MDPI, vol. 15(21), pages 1-19, October.

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