Experimental and theoretical study of interlaminar eddy current loss in laminated cores

Sahas Bikram Shah, Paavo Rasilo, Anouar Belahcen, Antero Arkkio

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

2 Citations (Scopus)
180 Downloads (Pure)

Abstract

Insulation failure between the electrical sheets of electrical machines or transformers might occur due to the burrs formed during the cutting process. Together with welding seams or screws used to hold the stack together, the burrs provide a conducting path for eddy currents. In this paper, equivalent conductivities of the EI core with and without interlaminar contacts are determined using 3D finite element computations and measurements. The core loss of the EI core is measured, and the eddy current loss is segregated from the measurements. Based on the acquired eddy current loss, the equivalent conductivities are determined using an iterative approach. In the case of interlaminar fault at one limb, eddy current loss coefficient increased by 2% and in the case of interlaminar fault at two limbs, eddy current loss coefficient increased by 2.7% compared to the healthy case.

Original languageEnglish
Title of host publicationProceedings of the 2017 20th International Conference on Electrical Machines and Systems, ICEMS 2017
PublisherIEEE
ISBN (Electronic)9781538632468
DOIs
Publication statusPublished - 2 Oct 2017
MoE publication typeB3 Non-refereed article in conference proceedings
EventInternational Conference on Electrical Machines and Systems - Sydney, Australia
Duration: 11 Aug 201714 Aug 2017
Conference number: 20

Conference

ConferenceInternational Conference on Electrical Machines and Systems
Abbreviated titleICEM
Country/TerritoryAustralia
CitySydney
Period11/08/201714/08/2017

Keywords

  • Burr
  • Conductivity
  • Eddy current loss
  • Finite element method (FEM)
  • Interlaminar current
  • Three dimensional (3D)

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