A non-isolated dual-input DC-DC converter with wide input voltage range for renewable energy sources

This paper presents a new non-isolated dual-input dc-dc converter. The proposed converter can transfer energy from different input sources to the output load individually and simultaneously. In addition, by operating in the step-up/down mode, the input voltages can be higher or lower than the output voltage which leads to a wide input voltage range. This feature is suitable for renewable energy systems that have wide voltage variations. The validity of the proposed converter is confirmed by experimental results from a prototype with 36–72V/24–60V inputs and a 48V/200W output.