Identification of the broken bar fault in induction motors with rotor air ducts through the torque spectrum

Konstantinos N. Gyftakis, Sang Bin Lee, Joya Kappatou, Jose A. Antonino-Daviu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Large induction motors contain axial air ducts in their rotor body for cooling purposes. It has been noted lately that, the presence of the rotor air ducts affects the rotating magnetic field by introducing asymmetries. Those asymmetries produce higher harmonic content in the induction motor electromagnetic variables, same like the broken bar fault. So, the diagnostic procedure of a healthy motor with axial rotor air ducts could lead to a false broken bar fault alarm, which leads to unnecessary inspection cost, as well a significant cost because of the production process interruption for the motor inspection. In this paper, it is shown that the higher harmonic index of the electromagnetic torque can reliably be used to distinguish the healthy from the broken bar case reliably in induction motors with rotor axial air ducts.

Original languageEnglish
Title of host publicationProceedings - 2014 International Conference on Electrical Machines, ICEM 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1614-1620
Number of pages7
ISBN (Print)9781479943890
DOIs
Publication statusPublished - 2014 Jan 1
Event21st International Conference on Electrical Machines, ICEM 2014 - Berlin, Germany
Duration: 2014 Sep 22014 Sep 5

Other

Other21st International Conference on Electrical Machines, ICEM 2014
CountryGermany
CityBerlin
Period14/9/214/9/5

Keywords

  • Axial air ducts
  • Broken bar
  • Fault diagnosis
  • Induction motor
  • Torque spectrum

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Mechanical Engineering

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