High Step-Up DC-DC Converter with Input Current Sharing Based on the Forward Converter

This paper presents a DC-DC converter capable of dealing with low voltage and high input current sources. The proposed topology is based on Forward converters with inputs connected in parallel and outputs connected in series. This configuration allows a natural sharing of the input current and provides high static gain to the converter. The phase-shift modulation is applied to reduce size and volume of the single output filter presented at the topology. The study carried out in this work includes the converter operation stages, equation, theoretical waveforms and modelling. In addition, experimental results performed from a 1-kW prototype are presented and discussed in order to validate the proposed converter operation in closed loop.