Abstract
A new configuration for foil windings in gapped inductors reduces AC resistance while maintaining very low DC resistance. Thus, it is particularly valuable for current waveforms composed of a large DC component with high-frequency ripple. The new technique is applied to an example 50 /spl mu/H inductor in which several different winding cross sections are compared. Finite-element simulations confirm that losses can be reduced by a factor of five relative to standard foil windings.
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