Three-Port DC-DC Converter Based on Ladder Switched Capacitor

This paper presents a family of three-port DC-DC converters based on the unidirectional ladder switched capacitor circuit with boost converter. From a few modifications, three new three-port DC-DC converter (TPC) topologies are proposed. In this paper, the ports are: solar panel, batteries and resistive load. This structure allows the current from the solar panel port to be always non-pulsating. However, for the load port and batteries port, different configurations allow achieving pulsating and non-pulsating current. Thus, these proposed structures are evaluated in this paper, as well as features of voltage gain and voltage stress across the semiconductors. Finally, simulation and experimental results are presented to validate the effectiveness of the theoretical evaluations.