Patent ID: 7180249
Filing Date: 2007-02-20
Classification: H02M,H05B

Abstract:
1. A switching element driving circuit to receive an input voltage from a DC power supply and alternately switch first and second switching elements connected in series on a secondary side of a pulse transformer, wherein, during operation, a signal from a first secondary winding of the pulse transformer is supplied to the first switching element, and a signal from a second secondary winding of the pulse transformer is supplied to the second switching element, the switching element driving circuit comprising: third and fourth switching elements on a primary side of the pulse transformer, wherein the third switching element is coupled to one of the primary windings of the pulse transformer, the fourth switching element is coupled to the other of the primary windings of the pulse transformer, and a regenerating unit, which includes a first inductor for limiting a current during an “on” time of the third or fourth switching element and a second inductor for performing a regenerating operation during an “off” time of the third and fourth switching elements, is connected to the DC power supply and the primary side of the pulse transformer.