An improved Non-Isolated Multiple-Input buck dc-dc converter

In this paper, an improved Non-Isolated bidirectional Multiple-Input (MI) Buck dc-dc converter has been proposed. In the proposed topology, the input sources can simultaneously/independently transfer energy to the load. The applied energy storage system -battery- not only realizes the bidirectional power flow (even when none storable input sources like Fuel Cells are utilized), but also can absorb the excess energy produced by input sources. Simple structure and reduced number of components (switches, inductors, capacitors and current sensors) are the main advantages of the proposed topology. Different operational modes and design consideration of proposed converter have been investigated. To confirm the validity of proposed converter, the two-input version has been modeled and simulated in PSCAD/EMTDC software and implemented experimentally. Obtained results validate the suitable performance of proposed topology.