The impact of non-linear permeability on electromagnetic stator core tests

D. R. Bertenshaw, A. C. Smith

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

Abstract

Routine electromagnetic testing is used to detect developing faults in the stator cores of large electrical machines. However the non-linear permeability and hysteresis of electrical steel cause the development of harmonics in the magnetic field, potentially affecting fault interpretation. A method to determine the Rayleigh hysteresis from specification data is developed. Since the use of sinusoidal test flux is shown to prevent an analytic solution of the magnetic field, a numeric integration is required to compute the resultant harmonics. The impact of these on the electromagnetic test is analysed and shown to be minor depending on the class of instrument.
Original languageEnglish
Title of host publicationPEMD 2014, The 7th IET international conference on Power Electronics, Machines and Drives
Place of PublicationLondon
PublisherInstitution of Engineering and Technology
Pages0052/1-0052/6
Publication statusPublished - 9 Apr 2014
EventPEMD 2014 - Power Electronics, Machines and Drives Conferebce - Manchester
Duration: 8 Apr 201410 Apr 2014

Conference

ConferencePEMD 2014 - Power Electronics, Machines and Drives Conferebce
CityManchester
Period8/04/1410/04/14

Keywords

  • EL CID
  • Electromagnetic stator test
  • Stator core
  • Condition monitoring
  • Harmonics

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