CLAMP CIRCUITS FOR POWER CONVERTERS

摘要

A power converter comprises an input port configured to receive a source of power, an output port configured to provide output power, and a bridge circuit coupled to the input port. The bridge circuit comprises a first switch coupled in series with a second switch, and a third switch coupled in series with a fourth switch. A first clamp rectifier is coupled in series with a second clamp rectifier, and the first and second clamp rectifiers are coupled in parallel with the first and second switches. A first clamp capacitor is coupled between the first and second clamp rectifiers, with the first clamp capacitor operative to reduce power loss in the first and second clamp rectifiers. A first resonant inductor is coupled between the first and second switches. The power converter also includes a transformer operatively coupled to the bridge circuit, with the transformer comprising a primary winding and at least one secondary winding. A current rectifying circuit is operatively coupled to the secondary winding of the transformer and the output port.

主权项

1. A power converter, comprising:
an input port configured to receive a source of power; an output port configured to provide output power; a bridge circuit operatively coupled to the input port, the bridge circuit comprising:
a first switch coupled in series with a second switch;a third switch coupled in series with a fourth switch;a first clamp rectifier coupled in series with a second clamp rectifier, wherein the first and second clamp rectifiers are coupled in parallel with the first and second switches;a first clamp capacitor coupled between the first and second clamp rectifiers, the first clamp capacitor operative to reduce power loss in the first and second clamp rectifiers; anda first resonant inductor coupled between the first and second switches; a transformer operatively coupled to the bridge circuit, the transformer comprising a primary winding and at least one secondary winding; and a current rectifying circuit operatively coupled to the secondary winding of the transformer and the output port.