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:
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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.
