Reliable detection of induction motor rotor faults under the rotor axial air duct influence

Chanseung Yang, Tae June Kang, Doosoo Hyun, Sang Bin Lee, Jose A. Antonino-Daviu, Joan Pons-Llinares

Research output: Contribution to journalArticlepeer-review

72 Citations (Scopus)

Abstract

Axial cooling air ducts in the rotor of large induction motors are known to produce magnetic asymmetry and can cause steady-state current or vibration spectrum analysis based fault detection techniques to fail. If the number of axial air ducts and that of poles are identical, frequency components that overlap with that of rotor faults can be produced for healthy motors. False positive rotor fault indication due to axial ducts is a common problem in the field that results in unnecessary maintenance cost. However, there is currently no known test method available for distinguishing rotor faults and false indications due to axial ducts other than offline rotor inspection or testing. Considering that there is no magnetic asymmetry under high slip conditions due to limited flux penetration into the rotor yoke, the detection of broken bars under the start-up transient is investigated in this paper. A wavelet-based detection method is proposed and verified on custom-built lab motors and 6.6-kV motors misdiagnosed with broken bars via steady-state spectrum analysis. It is shown that the proposed method provides the reliable detection of broken bars under the start-up transient independent of axial duct influence.

Original languageEnglish
Article number6701218
Pages (from-to)2493-2502
Number of pages10
JournalIEEE Transactions on Industry Applications
Volume50
Issue number4
DOIs
Publication statusPublished - 2014 Jan 1

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering

Fingerprint Dive into the research topics of 'Reliable detection of induction motor rotor faults under the rotor axial air duct influence'. Together they form a unique fingerprint.

Cite this