Homogenization of Current Distribution in Parallel Connection of Interleaved Winding Layers of High-Frequency Transformers by Optimizing Distance between Winding Layers

Ryo Murata, Tomohide Shirakawa, Kazuhiro Umetani, Eiji Hiraki, Hiroto Mizutani, Takaaki Takahara, Osamu Mori

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

Abstract

The windings of high-frequency high-current transformers are required to reduce the proximity effect loss. Therefore, the Litz wire in parallel connection of interleaved winding layers is usually used as the winding of transformers. However, this can cause unbalanced AC current distribution, hindering effective reduction of the copper loss. This paper solves this problem by optimizing the distance between the winding layers based on the analytical principle called the extremum co-energy principle. The transformers used in the experiment to verify this method consists of three parallel-connected primary winding and two parallel-connected secondary winding, PQ core, thin polypropylene sheets for adjusting the distance between the winding layers. As a result, the copper loss can be recused by homogenizing the AC current distribution, and the effectiveness of this method has been clarified by experiments.

Original languageEnglish
Title of host publication2020 22nd European Conference on Power Electronics and Applications, EPE 2020 ECCE Europe
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9789075815368
DOIs
Publication statusPublished - Sep 2020
Event22nd European Conference on Power Electronics and Applications, EPE 2020 ECCE Europe - Lyon, France
Duration: Sep 7 2020Sep 11 2020

Publication series

Name2020 22nd European Conference on Power Electronics and Applications, EPE 2020 ECCE Europe

Conference

Conference22nd European Conference on Power Electronics and Applications, EPE 2020 ECCE Europe
Country/TerritoryFrance
CityLyon
Period9/7/209/11/20

Keywords

  • Copper loss
  • Current distribution
  • Extremum co-energy principle
  • Transformer

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering
  • Safety, Risk, Reliability and Quality
  • Control and Optimization

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