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Effect of moisture on breakdown voltage of polyesterimide used in electrical machines

Nedjar, Mohamed and Mecheri, Yacine and Lamure, Alain and Aufray, Maëlenn and Drouet, Christophe Effect of moisture on breakdown voltage of polyesterimide used in electrical machines. (2011) In: 2010 Conference on Electrical Insulation and Dielectic Phenomena, 17 October 2010 - 20 October 2010 (West Lafayette, United States).

(Document in English)

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Official URL: http://dx.doi.org/10.1109/CEIDP.2010.5724018


This paper deals with the influence of humidity on breakdown voltage of polyesterimide. The specimens were submitted to an hydrolytic aging, under 90% humidity and 30°C temperature, until 3000 h. The breakdown tests were executed under AC and DC voltage. A statistical analysis of the breakdown voltage data was carried out using Weibull model. The 90% confidence bounds were calculated and plotted. The study shows that breakdown voltage varies versus the aging time. Its increase is allotted to the crosslinking of the material structure. Whereas its decrease is ascribed to the plastificization of the polymer. The breakdown voltage under DC ramp is higher than that obtained under AC ramp. The DC breakdown voltage depends on the polarity.

Item Type:Conference or Workshop Item (Paper)
HAL Id:hal-04296571
Audience (journal):International peer-reviewed journal
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Université Mouloud Mammeri Tizi Ouzou - UMMTO (ALGERIA)
Laboratory name:
Deposited On:10 Oct 2014 07:13

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