Input-Series and Output-Parallel configuration adopted Interleaved LLC Resonant Converter for High Current Applications

摘要

Recently, the LLC series resonant converter is widely used for the front end DC-DC converter in distributed power systems because it has many advantages over other power converters. However, it is difficult to apply this topology to high current applications because the current ripple stress on the output capacitor becomes severely high. Nevertheless, it is possible to reduce the output current ripple drastically as employing the interleaved technique. In this paper, an input-series and output-parallel configuration, which guarantees robust load sharing property between master and slave converters, is introduced and analyzed. In order to validate the proposed configuration, the laboratory experiments are executed and discussed with a 480W prototype.