METHOD AND APPARATUS FOR DRIVING SWITCHING ELEMENT IN POWER CONVERTER

摘要

A small-sized lightweight power converter of high efficiency with low conduction loss. The power converter includes a drive circuit for driving a switching element, in which a current-controlled switching element is connected with the primary side of a current transformer, and the switching element is supplied with a drive current that is the output current produced by a drive current generator formed of the secondary winding of the current transformer and a rectifier connected with the secondary winding. The output current of the switching element is detected, and a portion of the output current from the drive current generator is diverged outside the drive circuit so that the drive current for the switching element may vary depending on the detected output current. The diverged output current from the drive current generator is preferably supplied as regeneration power to any auxiliary power supply.