Condition monitoring for mechanical faults in motor drive systems using the recifier input currents

Jing Li, Mark Sumner, Jesus Arellano-Padilla, Greg Asher

Research output: Chapter in Book/Conference proceedingConference contributionpeer-review

3 Citations (Scopus)

Abstract

This paper presents a novel scheme to predict and detect different mechanical faults in a variable speed motor drive (e.g. eccentricity, defective bearings, faulty gearbox), by monitoring components in the rectifier input current. The scheme is based on the principle that a torque disturbance in the machine (produced by the mechanical fault) propagates from the machine through the PWM inverter, the DC link LC filter, and through the diode bridge rectifier. This paper provides a theoretical analysis of how the disturbance propagates through the system such that the disturbance components in the rectifier input current can be predicted for a specific fault at a specific motor speed to enhance condition monitoring. Experimental results are presented for a 4kW servo drive with a programmed load disturbance. An agreement is observed between the theoretically predicted components and those measured from the experimental system.

Original languageEnglish
Title of host publication5th IET International Conference on Power Electronics, Machines and Drives, PEMD 2010
Edition563 CP
DOIs
Publication statusPublished - 2010
Externally publishedYes
Event5th IET International Conference on Power Electronics, Machines and Drives, PEMD 2010 - Brighton, United Kingdom
Duration: 19 Apr 201021 Apr 2010

Publication series

NameIET Conference Publications
Number563 CP
Volume2010

Conference

Conference5th IET International Conference on Power Electronics, Machines and Drives, PEMD 2010
Country/TerritoryUnited Kingdom
CityBrighton
Period19/04/1021/04/10

Keywords

  • Condition monitoring
  • Diagnostics
  • Electrical drive
  • Fault signal propagation
  • Mechanical faults

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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