Patent ID: 6272023
Filing Date: 2001-08-07
Classification: H02M,Y02B

Abstract:
A power converter comprising:an input coupleable to a source of DC potential,an output coupleable to a DC load,a magnetic circuit element network comprising,a first coupled inductive element with substantial DC energy storage capability having a secondary winding coupled to said output and a primary winding,a second coupled inductive element with substantial DC energy storage capability having a secondary winding coupled to said output and a primary winding coupled in series to said primary winding of said first coupled inductive element,a third inductive element coupled in series with both said first and said second coupled inductive elements,a full bridge primary switch network comprising,first switch means for coupling said input to said magnetic circuit element network,second switch means for coupling said input to said magnetic circuit element network and to said first switch means operable substantially in anti-synchronization with said first switch means,third switch means for coupling said input to said magnetic circuit element network,fourth switch means for coupling said input to said magnetic circuit element network and to said third switch means operable substantially in antisynchronization with said third switch means,fifth switch means for coupling said secondary winding of said first coupled inductive element to said load,sixth switch means for coupling said secondary winding of said second coupled inductive element to said load operable substantially in anti-synchronization with said fifth switch means,control means for activating said first, second, third, fourth, fifth, and sixth switch means such that said first, second, third, and fourth switch means are operated when the voltage drop therethrough is substantially zero,whereby said third inductive element has sufficient energy storage capability to maintain the primary winding current direction in said first and said second coupled inductive elements' primary windings throughout the duration of the turn on transitions of all said switch means of said full bridge primary switch network.