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Analysis of Litz Wire Losses Using Homogenization-Based FEM

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Title: Analysis of Litz Wire Losses Using Homogenization-Based FEM
Authors: Otomo, Yoshitsugu Browse this author
Igarashi, Hajime Browse this author →KAKEN DB
Sano, Hiroyuki Browse this author
Yamada, Takashi Browse this author
Keywords: Circulating current
finite element (FE) analysis
homogenization method
litz wire
proximity effect
Issue Date: Aug-2021
Publisher: IEEE (Institute of Electrical and Electronics Engineers)
Journal Title: IEEE Transactions on Magnetics
Volume: 57
Issue: 8
Start Page: 7402409
Publisher DOI: 10.1109/TMAG.2021.3081819
Abstract: This article proposes a novel analysis method for the losses in a litz wire considering the circulating and eddy currents. In the proposed method, the macroscopic complex permeability is introduced to evaluate the eddy current loss owing to the proximity effect. Homogenization-based finite element analysis using the macroscopic complex permeability can effectively compute the proximity effect loss. The loss owing to the circulating currents is evaluated by solving the corresponding circuit equation. It is shown that the eddy current loss is dominant for the solenoidal and spiral coils without magnetic cores because of the uniform magnetic field distribution along the wire. Moreover, the magnetic reactors in which the circulating current loss cannot be ignored are analyzed using the proposed method. It is shown that the losses computed by the proposed method agree well with the measured results.
Rights: © 2021 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Type: article (author version)
Appears in Collections:情報科学院・情報科学研究院 (Graduate School of Information Science and Technology / Faculty of Information Science and Technology) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 大友 佳嗣

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