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Thermally Induced Mechanical Stress in the Stator Windings of Electrical Machines

Author

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  • Bishal Silwal

    (Department of Electrical Energy, Metals, Mechanical Constructions and Systems, Ghent University, Ghent 9000, Belgium)

  • Peter Sergeant

    (Department of Electrical Energy, Metals, Mechanical Constructions and Systems, Ghent University, Ghent 9000, Belgium
    EEDT—Flanders Make, the Strategic Research Center for the Manufacturing Industry, Belgium)

Abstract

The lifetime of an electrical machine mainly depends on the thermal overloading. Modern day applications of electrical machines on one hand require compact machines with high power density, while on the other hand force electrical machines to undergo frequent temperature cycling. Until recently, in the case of electrical machines, the main factor related to the degradation of the winding insulation was thought to be the thermal oxidization of the insulation materials. It has now been revealed that thermal overloading can also induce mechanical stress in the windings of electrical machines, which over time could lead to fatigue and degradation. In this paper, a comprehensive study of the thermally induced mechanical stress in the windings of an electrical machine is presented. The study is performed using combined thermo-mechanical models. The numerical results are validated by experiments on a segmented stator winding set-up.

Suggested Citation

  • Bishal Silwal & Peter Sergeant, 2018. "Thermally Induced Mechanical Stress in the Stator Windings of Electrical Machines," Energies, MDPI, vol. 11(8), pages 1-18, August.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:8:p:2113-:d:163610
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    References listed on IDEAS

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    1. Yingning Qiu & Wenxiu Zhang & Mengnan Cao & Yanhui Feng & David Infield, 2015. "An Electro-Thermal Analysis of a Variable-Speed Doubly-Fed Induction Generator in a Wind Turbine," Energies, MDPI, vol. 8(5), pages 1-17, April.
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    Cited by:

    1. Adam Decner & Marcin Baranski & Tomasz Jarek & Sebastian Berhausen, 2022. "Methods of Diagnosing the Insulation of Electric Machines Windings," Energies, MDPI, vol. 15(22), pages 1-24, November.
    2. Janjanam Naveen & Myneni Sukesh Babu & Ramanujam Sarathi & Ramachandran Velmurugan & Michael G. Danikas & Athanasios Karlis, 2021. "Investigation on Electrical and Thermal Performance of Glass Fiber Reinforced Epoxy–MgO Nanocomposites," Energies, MDPI, vol. 14(23), pages 1-17, November.
    3. Bishal Silwal & Abdalla Hussein Mohamed & Jasper Nonneman & Michel De Paepe & Peter Sergeant, 2019. "Assessment of Different Cooling Techniques for Reduced Mechanical Stress in the Windings of Electrical Machines," Energies, MDPI, vol. 12(10), pages 1-18, May.

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