Dielectric characteristics of electric vehicle traction motor winding insulation under thermal ageing

Gyftakis, Konstantinos N.; Kavanagh, Darren F.; Sumisławska, Malgorzata; Howey, David A.; McCulloch, Malcolm

doi:10.1109/eeeic.2015.7165179

Cited by 13 publications

(1 citation statement)

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“…The thermal aging is one of the principal causes of progressive deterioration and failure of the insulation system of rotating EMs [16][17][18]. The "reliability" is defined as the ability of a system to satisfactorily perform its intended duty for a specified time-span and for a given operating environment.…”

Section: Thermal Aging In Solid Insulating Materialsmentioning

confidence: 99%

Weibull Distribution and Geometrical Size Factor for Evaluating the Thermal Life of Electrical Machines’ Insulation

Madonna

Giangrande

Galea

2020

IECON 2020 the 46th Annual Conference of the IEEE Industrial Electronics Society

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The thermal lifetime assessment of electrical machines' insulation systems is generally performed at the design and prototyping stages. Hence, the insulation system's thermal endurance curve (or temperature index) can be extrapolated, allowing the machine designer to tune lifetime prediction models and / or qualify a market-ready prototype, according to technical standards. The whole thermal evaluation process usually relies on accelerated thermal aging tests carried out on appropriate specimens, and an extensive economical effort could be needed. In this paper, a methodology relying on the Weibull statistical distribution and the geometrical size factor (i.e. statistical enlargement law) is analyzed for evaluating the machine's thermal life by using simple twisted pair as specimen. The obtained results are also experimentally validated against data collected on a different specimen's layout, namely random wound coils, confirming the feasibility of the analyzed approach.

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Section: Thermal Aging In Solid Insulating Materialsmentioning

confidence: 99%