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Lifetime consumption and degradation analysis of the winding insulation of electrical machines

Sciascera, C; Galea, Michael; Giangrande, Paolo; Gerada, C.

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Authors

C Sciascera

MICHAEL GALEA Michael.Galea@nottingham.ac.uk
Professor of Electrical Machines and Drives

Paolo Giangrande



Abstract

In this paper, a novel multi-stress model which estimates the lifetime of the winding insulation relative to its duty cycle is proposed and investigated. With an adequate implementation of this model, then an electrical machine can be designed not only in terms of its performance requirements, but also considering the associated reliability and lifetime aspects. Since thermal and thermo-mechanical stresses are considered as the main ageing factors, the model is particularly suited for low voltage, low duty cycle machines. The determination of the model parameters is based on the results of accelerated thermo-mechanical ageing tests, whose procedure is thoroughly reported in the paper. The results of the accelerated ageing tests show that the effect of thermo-mechanical ageing is significant even for small size, random wound windings under fast temperature rise.

Citation

Sciascera, C., Galea, M., Giangrande, P., & Gerada, C. (in press). Lifetime consumption and degradation analysis of the winding insulation of electrical machines.

Conference Name 8th IET International Conference on Power Electronics, Machines and Drives (PEMD 2016)
End Date Apr 21, 2016
Acceptance Date Feb 16, 2016
Online Publication Date Nov 10, 2016
Deposit Date Feb 8, 2017
Publicly Available Date Feb 8, 2017
Peer Reviewed Peer Reviewed
Keywords Thermo-mechanical ageing, multi-stress ageing, winding insulation lifetime, electrical machines
Public URL https://nottingham-repository.worktribe.com/output/829315
Publisher URL http://ieeexplore.ieee.org/document/7739419/?arnumber=7739419

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