Breakdown resistance analysis of traction motor winding insulation under thermal ageing

K. N. Gyftakis, P. A. Panagiotou, N. Lophitis, D. A. Howey, M. D. McCulloch

    Research output: Chapter in Book/Report/Conference proceedingConference proceedingpeer-review

    12 Citations (Scopus)
    65 Downloads (Pure)


    Stator inter-Turn faults are among the most important electric motor failures as they progress fast and lead to catastrophic motor breakdowns. Inter-Turn faults are caused due to the windings' insulation degradation. The main stress which deteriorates the insulation is the thermal one. Proper understanding of how this stress influences the electrical properties of insulation over time may lead to reliable prognosis and estimation of the motor's remaining useful life. In transport applications where reliability and safety come first it is a critical issue. In this paper, extensive experimental testing and statistical analysis of thin film insulation for traction motor windings has been performed under fixed thermal stress. The results indicate that for high thermal stress the electrical properties of the insulation material present a non-monotonic behavior thus proving the well-known and established Arrhenius law inadequate for modelling this type of problems and estimating the remaining useful life of thin film insulation materials.

    Original languageEnglish
    Title of host publication2017 IEEE Energy Conversion Congress and Exposition, ECCE 2017
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    Number of pages7
    ISBN (Electronic)978-1-5090-2998-3, 978-1-5090-2997-6
    ISBN (Print)978-1-5090-2999-0
    Publication statusPublished - 3 Nov 2017
    Event9th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2017 - Cincinnati, United States
    Duration: 1 Oct 20175 Oct 2017 (Link to conference website)


    Conference9th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2017
    Abbreviated titleECCE
    Country/TerritoryUnited States
    Internet address

    Bibliographical note

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    • Breakdown Voltage
    • Degradation
    • Electric Motor
    • Insulation
    • Prognosis

    ASJC Scopus subject areas

    • Energy Engineering and Power Technology
    • Electrical and Electronic Engineering
    • Renewable Energy, Sustainability and the Environment
    • Control and Optimization


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