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Analysis of Impact of Design Solutions of an Electric Machine with Permanent Magnets for Bearing Voltages with Inverter Power Supply

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  • Sebastian Berhausen

    (Faculty of Electrical Engineering, Silesian University of Technology, 44-100 Gliwice, Poland)

  • Tomasz Jarek

    (Łukasiewicz Research Network, Institute of Electrical Drives and Machines KOMEL, 40-203 Katowice, Poland)

Abstract

The aim of the article is to present a new idea of limiting the bearing voltage in electric machines with permanent magnets through the use of a shielding winding placed in stator slot wedges. The first part of the article is dedicated to the mechanisms of generating bearing voltages when the machine is supplied from the mains and from a power electronic converter. Additionally, some methods of counteracting these phenomena were described. Next, multivariant simulation tests were carried out based on the two-dimensional field model of a synchronous machine with permanent magnets. The tests were run in order to determine the internal capacitances of the machine, on which the level of bearing voltages depends. Based on these results, the optimal variant of the design solution ensuring the limitation of the bearing voltage to a safe level was selected. Using the model of a two-level converter and based on the equivalent diagram of the internal capacitances of the machine, the influence of the proposed shielding winding on the bearing voltage was estimated.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:12:p:4475-:d:842940
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    References listed on IDEAS

    as
    1. 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.
    2. Marek Turzyński & Piotr Musznicki, 2021. "A Review of Reduction Methods of Impact of Common-Mode Voltage on Electric Drives," Energies, MDPI, vol. 14(13), pages 1-30, July.
    3. Lei Yang & Ying Yang & Junfu Wen & Lei Jia & Erle Yang & Ruifang Liu, 2022. "Suppression of Rotor-Grounding Bearing Currents Based on Matching Stator and Rotor Grounding Impedances," Energies, MDPI, vol. 15(5), pages 1-13, February.
    4. Karolina Kudelina & Bilal Asad & Toomas Vaimann & Anton Rassõlkin & Ants Kallaste & Huynh Van Khang, 2021. "Methods of Condition Monitoring and Fault Detection for Electrical Machines," Energies, MDPI, vol. 14(22), pages 1-20, November.
    5. Tomasz Wolnik & Vítezslav Styskala & Tomas Mlcak, 2021. "Study on the Selection of the Number of Magnetic Poles and the Slot-Pole Combinations in Fractional Slot PMSM Motor with a High Power Density," Energies, MDPI, vol. 15(1), pages 1-24, December.
    6. Ryan Collin & Alex Yokochi & Annette von Jouanne, 2022. "Novel Characterization of Si- and SiC-Based PWM Inverter Bearing Currents Using Probability Density Functions," Energies, MDPI, vol. 15(9), pages 1-21, April.
    7. Sebastian Berhausen & Tomasz Jarek, 2021. "Method of Limiting Shaft Voltages in AC Electric Machines," Energies, MDPI, vol. 14(11), pages 1-19, June.
    8. Sebastian Berhausen & Stefan Paszek, 2021. "Determination of the Leakage Reactance of End Windings of a High-Power Synchronous Generator Stator Winding Using the Finite Element Method," Energies, MDPI, vol. 14(21), pages 1-15, October.
    9. Jan Ole Stockbrügger & Bernd Ponick, 2020. "Analytical Determination of the Slot and the End-Winding Portion of the Winding-to-Rotor Capacitance for the Prediction of Shaft Voltage in Electrical Machines," Energies, MDPI, vol. 14(1), pages 1-13, December.
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    Cited by:

    1. Tomasz Wolnik & Tomasz Jarek, 2022. "Solid Rotor Core vs. Lamination Rotor Core in Fractional-Slot PMSM Motor with High Power Density," Energies, MDPI, vol. 15(15), pages 1-16, August.
    2. 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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