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Original scientific paper

Qualitative FEM study of proximity loss reduction by various winding configurations – Part I

Stan Zurek ; Megger

Full text: english pdf 456 Kb

page 70-76

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Skin depth and proximity effects in transformer windings are important phenomena influencing the design even at power frequencies (50-60 Hz). However, they become critically important at elevated frequencies, especially for high-frequency transformers, operating in switched-mode power supplies for example, at any power level. This article presents a numerical study of optimum winding configurations which can drastically reduce the proximity effects. It is possible to make transformers operating even at 1 MHz without the use of very expensive Litz wire.


copper loss, proximity effect, proximity loss, skin effect, eddy currents, windings

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