Patent ID: 6862195

Claim:
A soft transition power converter, comprising: a transformer having a primary winding and a secondary winding forming at least part of a power output side of the power converter; an alternating current source, comprising a source of DC current and a set of switching elements electrically connecting said source of DC current to said primary winding for producing alternating current in said secondary winding; a rectifier circuit having an alternating current input for receiving said alternating current and producing a rectified current output at said power output side of the power converter; a soft transition inductor electrically connecting said source and said primary winding; and a source controller adapted to produce said alternating current by alternating the voltage across said secondary winding from one of a negative ON time during which said voltage is negative and a positive ON time during which said voltage is positive, to a dead time wherein the voltage is substantially zero, and then to the other of said negative ON time and said positive ON time.