| Title |
A Phase-Shifted Full-Bridge Converter With a New Rectifier Circuit for Reducing Circuiting Current |
| Authors |
Byoung-Gi Choi ; Woo-seok Lee ; Il-Oun Lee |
| DOI |
10.6113/TKPE.2021.26.3.237 |
| Keywords |
Circulating current; Phase-shifted full-bridge; DC/DC converter |
| Abstract |
This research proposes a new rectifier circuit to reduce the circulating current of a phase-shifted full bridge converter. The proposed circuit is a structure in which the output inductor of the secondary rectifier circuit is changed to a coupled inductor in the phase-shifted full bridge with the existing center-tapped rectifier. The parts are rearranged after adding a diode. After applying the proposed circuit, the circulating current to the primary current of the transformer and the voltage stress of the rectifier diode on the secondary side of the transformer are reduced. Accordingly, the snubber loss of the rectifier is improved. By reducing the circulating current and snubber loss, the circuit achieves higher efficiency than conventional circuits. In this research, we present the structure of the proposed circuit, its strengths, and the analysis results from experiments. Furthermore, its effectiveness is verified through the experimental results of a prototype converter with an input of 300-400 V and an output of 50 V/1 kW. |