open access

https://hdl.handle.net/2115/100418

Eddy Current Analysis of Litz Wire Considering Circulating Currents Using Integral Equations

英語

voltage excitation

2026-09-21

IEEE

IEEE transactions on magnetics

This paper presents a voltage excitation formulation of the integral equation method (IEM) for Litz wire analysis with circulating currents and a uniform external magnetic field. A strand-level impedance matrix is assembled from voltage responses to unit current excitations, and the strand currents are obtained by solving terminal circuit equations. The external magnetic field is introduced through voltage sources assigned to each strand and a source term in the magnetization equation. The formulation is validated using a four-conductor model by comparison with FEM. It is then applied to a 49-strand Litz wire model to demonstrate its applicability to 3-D twisting structures. The results show that the twisting level required to suppress loss depends on the excitation mechanism.

学術雑誌論文

Accepted Manuscript

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0018-9464

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