The impact of thermal degradation on electrical machine winding insulation

M. Sumislawska, K. N. Gyftakis, D. F. Kavanagh, M. McCulloch, K. J. Burnham, D. A. Howey

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract / Description of output

Inter-turn stator short circuits can develop quickly leading to serious damage of an electric machine. However, degradation mechanisms of winding insulation are not yet fully understood. The main contribution of this article is analysis of the impact of thermal ageing on the electrical properties of winding insulation. The insulation samples have been aged thermally at 200-275 °C and for 100-1600 hours. After aging, impedance spectroscopy measurements were undertaken on the samples and equivalent circuit model (ECM) parameters fitted for each measurement. This allows the impact of thermal ageing on ECM parameters to be analysed, giving insight into the changes of the electrical properties of the insulation. Ultimately this will lead to development of new methods for remaining life prediction of electrical machine windings.

Original languageEnglish
Title of host publicationProceedings - SDEMPED 2015
Subtitle of host publicationIEEE 10th International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives
PublisherInstitute of Electrical and Electronics Engineers
Pages232-238
Number of pages7
ISBN (Electronic)9781479977437
DOIs
Publication statusPublished - 21 Oct 2015
Event10th IEEE International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives, SDEMPED 2015 - Guarda, Portugal
Duration: 1 Sept 20154 Sept 2015

Conference

Conference10th IEEE International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives, SDEMPED 2015
Country/TerritoryPortugal
CityGuarda
Period1/09/154/09/15

Keywords / Materials (for Non-textual outputs)

  • electric machine
  • equivalent circuit model
  • impedance spectroscopy
  • polyamide-imide
  • stator winding
  • thermal degradation

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