Patent ID: 7372711

Claim:
For use in a power converter having parallel power trains, a circuit for reducing voltage spikes due to magnetizing current imbalances in said parallel power trains, comprising: a first and second node that are coupled, respectively, to a first and second center tap of transformer secondary windings; a conductive bypass path coupling said first and second nodes between said transformer secondary windings and inductors in each of said parallel power trains and configured to provide an alternative path to redirect magnetizing current imbalances from said inductors, wherein the conductive bypass path couples the parallel power trains and redirects at least part of a potentially damaging magnetizing current to prevent said potentially damaging magnetizing current from traversing both of said inductors in said parallel power trains, and wherein said conductive bypass path further prevents a reverse polarization of current in at least one of said inductors; and a capacitor located in said conductive bypass path that blocks a DC current between said parallel power trains.