Abstract
Inter-turn stator short circuits can develop quickly leading to serious damage of an electric machine. However, degradation mechanisms of winding insulation material are not yet fully understood. Therefore, the main contribution of this article is analysis of the impact of thermal ageing on the electrical properties of the thin film winding insulation. The insulation samples have been aged thermally at 200–275 °C and for 100–1600 hours. After ageing, 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. Finally, high voltage was applied to the samples aiming to identify the breakdown voltage characteristics of the insulation material.
| Original language | English |
|---|---|
| Pages (from-to) | 2951 - 2960 |
| Number of pages | 10 |
| Journal | IEEE Transactions on Industry Applications |
| Volume | 52 |
| Issue number | 4 |
| Early online date | 21 Mar 2016 |
| DOIs | |
| Publication status | Published - Jul 2016 |
Bibliographical note
This article has been accepted for publication in IEEE Transactions on Industry Applications. Full citation details will be uploaded when available.The full text is currently unavailable on the repository.
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Keywords
- equivalent circuit model
- electric machine
- impedance spectroscopy
- polyamide-imide
- stator winding
- thermal degradation