High efficient galvanically isolated resonant multi-input DC-DC converter topology

In this paper, a multi-input converter topology is proposed, which combines a series resonant converter (SRC) with a boost converter in a way that switching losses of the boost part can be significantly reduced, by using the resonant current of the SRC. This allows an efficient energy conversion from different power sources over a wide input voltage and power range. The gain of each terminal can be adjusted independently between 50 % and 100 % of the clamping voltage. An input voltage and input power dependent efficiency of up to 96.9 % has been measured with a demonstrator of several kW.