Patent ID: 6798672
Filing Date: 2004-09-28
Classification: H02M,Y02B

Abstract:
A power converter module comprising:a power transformer having a primary winding and a secondary winding adapted to be coupled electrically to a first load, said primary winding having first and second terminals connected electrically and respectively to first and second nodes; a first power switch having a first switch terminal connected electrically to said second node, and a second switch terminal connected electrically to a third node, said first and third nodes being adapted to be coupled electrically to a power source; and an active snubber circuit for recovering surge energy, said active snubber circuit including a snubber diode having a first diode terminal connected electrically to said first node and a second diode terminal connected electrically to a fourth node, a snubber capacitor having a first capacitor terminal connected electrically to said second node, and a second capacitor terminal connected electrically to said fourth node, a snubber transformer having a primary winding and a secondary winding adapted to be coupled electrically to a second load, said primary winding of said snubber transformer having a first terminal connected electrically to said fourth node and a second terminal connected electrically to a fifth node, and a second power switch having a first switch terminal connected electrically to said fifth node and a second switch terminal connected electrically to said third node.