Fault Signal Propagation Through the PMSM Motor Drive Systems

Jing Li, Mark Sumner, Jesus Arellano Padilla, He Zhang

Research output: Journal PublicationArticlepeer-review

6 Citations (Scopus)
41 Downloads (Pure)


This paper describes how a mechanical disturbance on the shaft of a variable-speed permanent-magnet motor is propagated to the supply input side of the drive system, and therefore may be detected by monitoring specific frequency components in the rectifier input current. The propagation of the disturbance from the torque disturbance to the motor current, then to the dc link current, and finally to the rectifier input current is derived as a series of transfer functions, so that both the frequency and the amplitude of the disturbance component in the rectifier input current can be predicted for a specific mechanical disturbance. The limitations to detect the mechanical fault by monitoring only the supply currents are also addressed. Simulation and experimental results are presented to demonstrate the accuracy of the quantitative analysis and the potential for fault detection using the rectifier input currents.

Original languageEnglish
Article number7870572
Pages (from-to)2915-2924
Number of pages10
JournalIEEE Transactions on Industry Applications
Issue number3
Publication statusPublished - 1 May 2017


  • Fault detection
  • fault signal propagation
  • mechanical faults
  • motor drive system
  • pulse-width modulation (PWM) inverter

ASJC Scopus subject areas

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


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