Design and Verification of Compact Inductor for Interleaved AC/DC Converter

Interleaving concepts with coupled inductors can be utilized for the reduction of passive component size, losses, and material cost. With coupled inductors, not all harmonics are attenuated and additional filter stages may be necessary. The paper presents an inductor designed to reduce both switching harmonics circulating within the coupled inductor as well as higher order harmonics injected into the grid. Analytical equations are derived for both conventional and the proposed inductors to show the benefits and the results are demonstrated with a lab prototype.