Current variation in a rotor bar during transients due to a hot spot

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

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

1 Citation (Scopus)


This paper presents an initial study to provide further insight on the conditions under which a natural bar breakage was reproduced experimentally. With this aim several magnitudes at a rotor bar's narrowing (hot spot) in an induction motor during heavy transients: long startup and plug stopping, are calculated in order to compare it with the experimental data, which suggested that the bar breakage process can be modelled by thermal fatigue. A combined analytical electrical and thermal procedure is used to obtain the current and temperature distribution in the cage based on values previously computed by 2D electromagnetic FEM, whilst the temperature, resistance and final stresses at the defect are calculated by Finite Element Analysis. The results show that the asymmetric heating alters the current distribution in the cage throughout the transients and that the interbar currents play a fundamental role in the evolution of the defect.

Original languageEnglish
Title of host publicationIECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society
Number of pages6
ISBN (Print)9781479917624
Publication statusPublished - 25 Jan 2016
MoE publication typeA4 Conference publication
EventAnnual Conference of the IEEE Industrial Electronics Society - Yokohama, Japan
Duration: 9 Nov 201512 Nov 2015
Conference number: 41


ConferenceAnnual Conference of the IEEE Industrial Electronics Society
Abbreviated titleIECON


  • Finite element analysis
  • Induction motors
  • Prognostics and health management
  • Rotors
  • Thermal stresses
  • Transient analysis


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