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Models for the estimation of life of stator insulation in large rotating machines

Ramu, TS and Keshavan, BK and Anuradha, M (2012) Models for the estimation of life of stator insulation in large rotating machines. In: 10th IEEE International Conference on the Properties and Applications of Dielectric Materials (ICPADM), JUL 24-28, 2012, Bangalore, INDIA .

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Epoxy resin bonded mica splitting is the insulation of choice for machine stators. However, this system is seen to be relatively weak under time varying mechanical stress, in particular the vibration causing delamination of mica and deboning of mica from the resin matrix. The situation is accentuated under the combined action of electrical, thermal and mechanical stress. Physical and probabilistic models for failure of such systems have been proposed by one of the authors of this paper earlier. This paper presents a pragmatic accelerated failure data acquisition and analytical paradigm under multi factor coupled stress, Electrical, Thermal. The parameters of the phenomenological model so developed are estimated based on sound statistical treatment of failure data.

Item Type: Conference Proceedings
Series.: International Conference on Properties and Applications of Dielectric Materials-ICPADM
Publisher: IEEE, NEW YORK, USA
Additional Information: Copyright for this article belongs to IEEE, NEW YORK, USA
Department/Centre: Division of Electrical Sciences > Electrical Engineering
Date Deposited: 10 Dec 2012 06:55
Last Modified: 10 Dec 2012 07:04
URI: http://eprints.iisc.ac.in/id/eprint/45519

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