Reliability oriented design of low voltage electrical machines based on accelerated thermal aging tests

Paolo Giangrande, Vincenzo Madonna, Michael Galea

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

Abstract

In transport applications, electrical machines (EMs) are required to be highly reliable, in order to fulfill the intended mission profile over the expected lifetime. This task has been conventionally addressed through the adoption of safety-factors that might lead to an over-engineered EM. Only recently, few works have started championing a paradigm shift towards physics of failure methodologies, which allow to achieve an appropriate trade-off between optimal performance and demanded reliability figures. Thus, this paper proposes a reliability oriented methodology for low voltage (LV) EMs and outlines its critical implementation steps. Accelerated thermal aging (ATA) tests are preliminarily performed on custom made samples to assess the aging trend of the inter-turn insulation. The thermal endurance graph at different percentile values is then determined and a lifetime model suitable for variable duty motors is developed. Finally, this model is used to predict the inter-turn insulation cycles-to-failure of an EM installed on full-electric vehicle.

Original languageEnglish
Title of host publication2020 International Symposium on Power Electronics, Electrical Drives, Automation and Motion, SPEEDAM 2020
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages448-453
Number of pages6
ISBN (Electronic)9781728170190
DOIs
Publication statusPublished - Jun 2020
Event2020 International Symposium on Power Electronics, Electrical Drives, Automation and Motion, SPEEDAM 2020 - Sorrento, Italy
Duration: 24 Jun 202026 Jun 2020

Publication series

Name2020 International Symposium on Power Electronics, Electrical Drives, Automation and Motion, SPEEDAM 2020

Conference

Conference2020 International Symposium on Power Electronics, Electrical Drives, Automation and Motion, SPEEDAM 2020
Country/TerritoryItaly
CitySorrento
Period24/06/2026/06/20

Keywords

  • Accelerated Aging Test (ATA)
  • Design of Experiment
  • Dielectric Breakdown
  • Electrical Machine (EM) Insulation
  • Physics of Failure (PoF)
  • Safety-Critical Applications

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Control and Optimization

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