Life‐time characteristics of random wound compressed stator windings under thermal stress
| Autor: | Nick J. Baker, M. C. Kulan |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Pressing Materials science Dielectric strength Stator 020208 electrical & electronic engineering 02 engineering and technology Compression (physics) 01 natural sciences law.invention Stress (mechanics) Reliability (semiconductor) law Electromagnetic coil 0103 physical sciences Thermal 0202 electrical engineering electronic engineering information engineering Electrical and Electronic Engineering Composite material |
| Zdroj: | IET Electric Power Applications. 13:1287-1297 |
| ISSN: | 1751-8679 1751-8660 |
| DOI: | 10.1049/iet-epa.2018.5805 |
| Popis: | Compression of windings is known to give thermal and performance benefits. The aim here is to investigate how the health of stator winding insulation systems are influenced by on-tooth coil pressing. A set of compressed coils have been aged by exposing them to high temperatures. Winding insulation resistance (IR) was monitored during this process to experimentally validate whether compressed coils remained healthy in terms of electrical insulation. In this case, a single stress (i.e. temperature) model is used to predict the reliability of the compressed coils. Accelerated life tests have been conducted to inspect the life expectancy and thermal endurance of the compressed stator coils. The employed statistical model (Arrhenius-Weibull) demonstrates that on-tooth coil pressing reduces the life expectancy dramatically due to reduced turn to ground wall insulation dielectric strength. |
| Databáze: | OpenAIRE |
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