JIN Feng-yi,MA Yu-fang.Analysis of Litz Wire AC Resistance Based on Semi-Analytical Finite Element Method[J].ACTA ELECTRONICA SINICA,2023,51(12):3457-3462.
JIN Feng-yi,MA Yu-fang.Analysis of Litz Wire AC Resistance Based on Semi-Analytical Finite Element Method[J].ACTA ELECTRONICA SINICA,2023,51(12):3457-3462. DOI: 10.12263/DZXB.20230001.
Analysis of Litz Wire AC Resistance Based on Semi-Analytical Finite Element Method
Litz wire is widely used in wireless power transfer
eddy current testing and other fields. Due to the large number of strands and complex geometric structure
the difficulty in calculating AC resistance is the main reason for limiting the design of Litz wire structure and electromagnetic parameters. The traditional finite element method and analytical method cannot meet the requirements in terms of computational efficiency and universality. In this paper
the AC resistance of Litz wire considering skin effect
proximity effect and circulating current is analyzed by semi-analytical finite element method and circuit system based on Python language. In the frequency range of 100 Hz to 1 MHz
the accuracy and efficiency of the semi-analytical finite element method for AC resistance calculation are verified based on the parallel Litz wire model
and the influence of pitch on the spatial magnetic field distribution of Litz wire is analyzed. The work in this paper can provide a reference for the structure and electromagnetic parameters selection of Litz wire model in different application scenarios.
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