In this paper, we present a high frequency coupled inductor design making the use of perpendicular air gaps and copper foil windings approach with the commercial off-the-shelf planar magnetic cores. The proposed inductor is prototyped and demonstrated in a 4-phase interleaved, 50 kW boost converter. The developed inductor prototype has a volume less than 0.5 L and a resonant frequency over 7 MHz with much lower ac resistance compared to a printed circuit board (PCB) based inductor. Preliminary experimental results are presented in this digest to validate the effectiveness of the design.
