Thermographic method for measuring iron losses and localized loss density

Osaruyi Osemwinyen, Sahas Bikram Shah, Antero Arkkio

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

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The knowledge of core losses in electrical machine is required for the successful design of highly efficient machines. This paper presents a thermographic technique for measuring core loss and localize loss density in an electrical machine. First, a 3D numerical solution of the stated problem was carried out in COMSOL multi-physics to study the possibility of the measurement technique. The experimental measurement process was demonstrated on a 24/12 V single-phase transformer. The excitation was supplied to the transformer by varying the applied voltage at a constant frequency of 300 Hz. IR camera was used to obtain the images of the core at the instant of supply for three different flux densities. The core losses were estimated from the initial rate of temperature rise and compared with the core loss obtained directly from the wattmeter. The results show that the developed system can accurately estimate core loss density and distribution over a wide range, with an error margin of less than 6%. However, the accuracy of the results obtained is affected by measurement condition.

Original languageEnglish
Title of host publicationProceedings of the 7th International Electric Drives Production Conference, EDPC 2017
Number of pages4
ISBN (Electronic)9781538610695
Publication statusPublished - 29 Mar 2018
MoE publication typeA4 Article in a conference publication
EventInternational Electric Drives Production Conference - Wurzburg, Germany
Duration: 5 Dec 20176 Dec 2017
Conference number: 7

Publication series

NameInternational Electric Drives Production Conference
ISSN (Print)2331-5644


ConferenceInternational Electric Drives Production Conference
Abbreviated titleEDPC


  • Core loss
  • IR camera
  • loss density
  • thermography

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