Impact of Vibrations Exposure Cycles on Wire Insulation Lifetime during Thermal Qualification

Yatai Ji, Vincenzo Madonna, Paolo Giangrande, Alan Zhang, Weiduo Zhao, Michael Galea

Research output: Chapter in Book/Conference proceedingConference contributionpeer-review

Abstract

This paper investigates the effect of the vibration exposure cycles on the lifetime during the thermal qualification tests of winding insulation. The study aims at evaluating the lifetime reduction and the consequent impact on the wire thermal class caused by mechanical stresses. Two groups of samples, i.e., motorettes, resembling the insulation system arrangement of an electrical machine for aerospace actuator application are built and tested. The first group is purely thermally aged, while the mechanical stress is also considered through extra vibrations cycles when the second group is aged (i.e., samples thermally aged and mechanically stressed). The recorded lifetime data are processed via the Weibull approach and the lifetime is determined for both sample groups. In addition, the dissipation factor is measured as a diagnostic marker after each aging cycle, and the results further demonstrate the dominant effect of thermal stress on the insulation lifetime.

Original languageEnglish
Title of host publication2022 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2022
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781665492065
DOIs
Publication statusPublished - 2022
Event2022 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2022 - Haining, China
Duration: 28 Oct 202231 Oct 2022

Publication series

Name2022 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2022

Conference

Conference2022 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2022
Country/TerritoryChina
CityHaining
Period28/10/2231/10/22

Keywords

  • electrical machines
  • enameled magnet wire
  • thermal aging
  • Type I insulation
  • vibrations
  • Weibull distribution
  • winding insulation

ASJC Scopus subject areas

  • Mechanical Engineering
  • Electrical and Electronic Engineering
  • Control and Optimization
  • Transportation

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