Examination on Copper Loss Reduction of High-frequency Transformers for Trains Using Magnetic Flux Path Control Technology

A rectangular wire is used for the windings of a train transformer in order to improve the space factor. However, as the frequency is increased, copper loss due to skin and proximity effects occurs and heat generation becomes a problem. The authors investigated reduction of copper loss in order to s...

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Bibliographic Details
Published in2019 International Conference on Electrical Engineering Research & Practice (ICEERP) pp. 1 - 6
Main Authors Kubota, Kazuma, Shimura, Kazuhiro, Torishima, Kenta, Sato, Mitsuhide, Bu, Yinggang, Mizuno, Tsutomu, Sakurada, Masayuki, Nebashi, Takao, Koike, Norio
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.11.2019
Subjects
copper loss reduction
magnetic flux path control technology
magnetic-composite material
proximity effect
skin effect
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Summary:A rectangular wire is used for the windings of a train transformer in order to improve the space factor. However, as the frequency is increased, copper loss due to skin and proximity effects occurs and heat generation becomes a problem. The authors investigated reduction of copper loss in order to suppress heat generation in the transformer winding. By changing the winding structure, copper loss could be reduced by 8.1% more than before change. Furthermore, by applying magnetic-flux path-control technology, the copper loss generated in the transformer could be reduced by 19.9%.
DOI:10.1109/ICEERP49088.2019.8956970