Detection of rotor fault in three-phase induction motor in case of low-frequency load oscillation

GÖKTAŞ T., ARKAN M., Ozguven O. F.

ELECTRICAL ENGINEERING, vol.97, no.4, pp.337-345, 2015 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 97 Issue: 4
  • Publication Date: 2015
  • Doi Number: 10.1007/s00202-015-0342-5
  • Journal Name: ELECTRICAL ENGINEERING
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.337-345
  • Keywords: ASAF method, Broken rotor bar, Fault diagnosis, Fault detection, Hilbert transform, Induction motor, Load torque oscillation
  • Dokuz Eylül University Affiliated: No

Abstract

This paper proposes a method for the separation of broken rotor bar failure and low-frequency load fluctuation in line-fed three-phase induction motor. In practice, the presence of load fluctuation at has the same effect on a stator current of induction motor as a broken rotor bar fault. In such cases, the detection of broken rotor bar failure becomes difficult. To discern rotor fault and load oscillations, the analytical signal angular fluctuation (ASAF) method, which is a combination of Hilbert transform and the space vector angular fluctuation method, is used. The presented experimental results prove that low-frequency load oscillation and rotor fault can reliably be discriminated using the ASAF signal spectrum.