Reliable Detection of Rotor Faults under the Influence of Low-Frequency Load Torque Oscillations for Applications with Speed Reduction Couplings

Heonyoung Kim, Sang Bin Lee, Sungbong Park, Shahin Hedayati Kia, Gerard Andre Capolino

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

Low-frequency torque oscillations in the load can induce frequency components in the vicinity of that of rotor faults (RFs) resulting in false alarms when applying motor current signature analysis (MCSA). False RF indications due to load oscillations (LO) are most common in applications that employ speed reduction couplings for high torque, low-speed operation. Recently, ideas for separating RF and LO have been proposed in the literature; however, the case where two components overlap at the same frequency has not been investigated. Several cases where RF-and LO-induced components are identical have been observed in the field by the authors with commercial MCSA equipment. It is shown in this paper that overlap between the two components can produce a false positive or false negative indication because they can add or cancel depending on the relative phase between the components. Alternative options for reliable RF testing among existing test methods are evaluated and verified in this paper for cases where the two components overlap and produce false indications.

Original languageEnglish
Article number7355342
Pages (from-to)1460-1468
Number of pages9
JournalIEEE Transactions on Industry Applications
Volume52
Issue number2
DOIs
Publication statusPublished - 2016 Mar 1

Keywords

  • Belt Pulleys
  • Couplings
  • Electrical Fault Detection
  • Gears
  • Harmonic Analysis
  • Induction Motors
  • Rotors
  • Spectral Analysis
  • Wavelet Transforms

ASJC Scopus subject areas

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

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