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Article type: Research Article
Authors: Fejérvári, Líviaa | Bilicz, Sándorb; | Gyimóthy, Szabolcsb | Pávó, Józsefb | Varga, Gábora; d | Várallyay, Zoltána | Yamada, Yusukec | Shimura, Takahiroc | Orito, Hiroshic | Azuma, Yoshifumic
Affiliations: [a] Furukawa Electric Institute of Technology, Ltd., Budapest, Hungary | [b] Department of Broadband Infocommunications and Electromagnetic Theory, Budapest University of Technology and Economics, Faculty of Electrical Engineering and Informatics, Műegyetem rkp. 3., H-1111, Budapest, Hungary | [c] Furukawa Electric Co., Ltd., Hiratsuka, Japan | [d] Department of Physics, Budapest University of Technology and Economics, Faculty of Natural Sciences, Műegyetem rkp. 3., H-1111, Budapest, Hungary
Correspondence: [*] Corresponding author: Sándor Bilicz, Department of Broadband Infocommunications and Electromagnetic Theory, Faculty of Electrical Engineering and Informatics, Budapest University of Technology and Economics, Budapest 1111, Hungary. Tel.: +36 1 463 2723; E-mail: bilicz.sandor@vik.bme.hu
Abstract: Litz wires consist of many individual, isolated conductor strands. Certain litz wires are fabricated by simply twisting the bundle of strands, hence a wire pitch is realized. In this paper, the ac resistance of coils made of such twisted litz wire are calculated by combining two-dimensional finite element simulation and circuit laws. In so doing, the inherently three-dimensional problem can be solved at much lower computational cost. Results are presented for the current distribution, and for the alternating current resistance of coils, validated against measured data.
Keywords: Litz wire, finite element, ac resistance, joule loss, skin effect, proximity effect
DOI: 10.3233/JAE-210205
Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 70, no. 1, pp. 21-31, 2022
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