Power converter and associated transformer and transformer-rectifier block

Abstract

The present invention discloses a power converter and associated transformer and transformer-rectifier (TR) block. The power converter has a bridge circuit and a plurality of TR blocks. Each TR block has a substrate, a transformer, and a rectifier circuit. The transformer has a bottom end that is mounted on the substrate. The transformer has a magnetic core, a first primary winding, a first secondary winding that is wound over the first primary winding, a second primary winding, and a second secondary winding that is wound over the second primary winding. The first and second secondary windings are disposed adjacent to each other. Portions of the first and second secondary windings extend toward a top end of the transformer and are covered by the magnetic core. The rectifier circuit is mounted on the substrate, having a first rectifier and a second rectifier. The first rectifier is electrically connected to an end of the first secondary winding, and the second rectifier is electrically connected to an end of the second secondary winding. In the present disclosure, leakage flux of the transformer is through a magnetic core that is disposed on top of the winding, thereby reducing the footprint of the transformer and allowing for flux cancellation and lower AC winding loss.

Images