Comparison of thermal stresses developed during transients on a damaged rotor cage

Vicente Climente-Alarcon, Antero Arkkio, Jose A. Antonino-Daviu

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

1 Citation (Scopus)
141 Downloads (Pure)

Abstract

Structural defects in the rotor cage of large electrical machines significantly impact their expected operational lifetime. This work simulates the stresses developed in a damaged rotor cage during different transient profiles and for different sizes of the imperfection. A combined model featuring electrical, thermal and mechanical stages as well as three different meshes reflecting a progressing narrowing of one of the bars in its junction to the end ring are used for this purpose. The results qualitatively agree with a previously presented fatigue test and show that under severe conditions the capability of aluminum to absorb stress is limited, and a state of plastic deformation is rapidly reached. The effect of a possible mitigation strategy is also studied.
Original languageEnglish
Title of host publicationProceedings of the 2017 IEEE Energy Conversion Congress and Exposition, ECCE 2017
PublisherIEEE
Pages3545-3551
Number of pages7
ISBN (Electronic)978-1-5090-2998-3
DOIs
Publication statusPublished - 2017
MoE publication typeA4 Article in a conference publication
EventIEEE Energy Conversion Congress and Exposition - Cincinnati, United States
Duration: 1 Oct 20175 Oct 2017

Publication series

NameIEEE Energy Conversion Congress and Exposition
ISSN (Print)2329-3721

Conference

ConferenceIEEE Energy Conversion Congress and Exposition
Abbreviated titleECCE
CountryUnited States
CityCincinnati
Period01/10/201705/10/2017

Keywords

  • finite element analaysis
  • induction motors
  • prognostics and health management
  • rotors
  • thermal stresses
  • transient analysis

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