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An analytical model based on one dimensional 1-D Dowell's equation for computing ac-to-dc winding resistance ratio FR of litz wire is presented. The model takes into account proximity effect within the bundle and between bundle layers as well as the skin effect. Model describes three frequency ranges: low-, medium-, and high-frequency range. In each of ranges, the behavior of the ac-to-dc winding...
While the use of foil windings in transformers and air core inductors is not uncommon, their use in electric machines is just emerging. Although prototype realizations have been reported in the literature, a definitive analysis of their thermal performance is necessary to evaluate their potential for broad applications. This paper is devoted to presenting a comprehensive model for evaluating their...
This paper discusses the loss in the transformer and the inductor in applications of the DC/DC converters. The analysis of this loss due to eddy currents in windings conductor of these transformers and inductors is made. This eddy current loss is caused particularly by two effects: skin effect and proximity effect, which are also part of this text. The design optimization of these windings to minimize...
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