A new family of isolated zero-voltage-switched converters

A family of isolated, zero-voltage-switched converters which utilizes the magnetizing inductance of the transformer to achieve zero voltage turn-on of the primary switches is proposed. In addition, by employing saturable inductors on the secondary side, soft turn-off of the output rectifiers is obtained with a minimum circulating energy flowing through the converter. The proposed converters can operate either with a variable or constant switching frequency. A complete DC analysis and design guidelines for the half-bridge topology are described, and the performance of a 100 W experimental converter is presented.