A low-intrusion load and efficiency evaluation method for in-service motors using vibration tests with an accelerometer

He Zhang, Pericle Zanchetta, Keith J. Bradley, Chris Gerada

Research output: Journal PublicationArticlepeer-review

22 Citations (Scopus)

Abstract

This paper presents a novel low-intrusion load and efficiency evaluation method for in-service induction motors based on vibration measurements. This method enhances the traditional vibration analysis by providing motor load and efficiency information in addition to the mechanical health information. The application is in multimotor plants, where individual motor monitoring is too expensive to implement yet where motor operating conditions need to be known to work at improved plant efficiency. The vibration signature of the machine, measured by an accelerometer and processed by fast Fourier transform (FFT) is used to extract frequencies defining shaft speed and the supply frequency. This data, in conjunction with the basic motor performance data, enables the determination of the actual load and indirectly, the efficiency which the motor is operating at. For motors supplied form a variable-speed drive (VSD), the loss segregation method is used to yield the motor losses indirectly and thus, the efficiency.

Original languageEnglish
Article number5460914
Pages (from-to)1341-1349
Number of pages9
JournalIEEE Transactions on Industry Applications
Volume46
Issue number4
DOIs
Publication statusPublished - Jul 2010
Externally publishedYes

Keywords

  • Energy and efficiency measurement
  • induction machines
  • industrial power system
  • vibration

ASJC Scopus subject areas

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

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