Topology Analysis of Basic Non-isolated DC/DC Converter and DC Distributed Power System

DC/DC converter and DC distributed power system (DC-DPS) have been widely used in many industrial fields. This paper systematically studies the rule and method of deriving the basic topologies of them. Starting with the overall structure of basic non-isolated DC/DC converters, it can be divided into three cascaded units. Each unit can further be divided into voltage-type (V-type) and current-type (C-type). Then, according to the basic circuit theory, four categories of basic non-isolated DC/DC converter generalized structures and twelve specific non-isolated DC/DC converter topologies are all derived out. Based on the same topology construction principle above, the basic DC V-type and C-type distributed power system generalized structures are both established, which can be named DCV-DPS and DCC-DPS. On this basis, two practical DC-DPS topology structures are also given out as an application example. Finally, combined with high-power LED driving applications, a 90W prototype with three channel outputs based on the DCC-DPS topology structure is built and the experimental results are presented. It is proved that the proposed topology construction rule and analysis method are valid.