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Experimental and Theoretical Study of Interlaminar Eddy Current Loss in Laminated Cores

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

Details

Original languageEnglish
Title of host publicationThe 20th International Conference on Electrical Machines and Systems
PublisherIEEE
ISBN (Electronic)978-1-5386-3246-8
DOIs
Publication statusPublished - 2017
Publication typeB3 Non-refereed article in conference proceedings
EventINTERNATIONAL CONFERENCE ON ELECTRICAL MACHINES AND SYSTEMS -
Duration: 1 Jan 1900 → …

Conference

ConferenceINTERNATIONAL CONFERENCE ON ELECTRICAL MACHINES AND SYSTEMS
Period1/01/00 → …

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.

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