NDLI: The optimization of high frequency inductors with litz-wire windings

Content Provider	IEEE Xplore Digital Library
Author	Stadler, A.
Copyright Year	2013
Description	Author affiliation: Univ. of Appl. Sci. Augsburg, Augsburg, Germany (Stadler, A.)
Abstract	In this paper, a systematic procedure is presented, how to predict the AC resistance of litz-wire windings considering air gap fringing fields. For this purpose, an equivalent complex permeability model is derived for hexagonally packed wires. It is shown, how finite element method (FEM) can be used to determine the real- as well as the imaginary part of the complex permeability with the copper filling factor as a parameter. A further FEM-model is deduced to describe the air gap fringing fields of gapped inductors. Accordingly, the exact proximity losses of the litz-wire winding are determined correctly and the AC resistance of practical inductors can be predicted over a wide frequency range with high accuracy. This offers the opportunity to optimize such components. Finally, the influence of various parameters on the copper losses is investigated and verified by means of experimental data drawn from impedance measurements.
Starting Page	209
Ending Page	213
File Size	3154624
Page Count	5
File Format	PDF
ISSN	21669546
e-ISBN	9781467349130
DOI	10.1109/CPE.2013.6601156
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-06-05
Publisher Place	Slovenia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Resistance Atmospheric modeling Windings Wires Permeability Copper Inductors
Content Type	Text
Resource Type	Article

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