Abstract

This paper proposes an experimental method to investigate the thermal conduction model of a power electronics toroidal inductor using Litz wire resin molded. Several parameters of the model are unknown, and have to be identified experimentally, among them the radial conductivity of the Litz wire. It is also shown in this paper that the thermal model necessitates a 2D representation. By comparing the identification on several samples, it is possible to obtain the main parameters of the thermal model, which can thus be used for optimization during a design process.

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