Conversor CC-CC boost não isolado de alto ganho baseado na célula de comutação de três estados empregando indutor acoplado e células multiplicadoras de tensão

Abstract

Several modern applications require the use of non-isolated DC-DC converters with a wide conversion rate, such as renewable energy conversion systems and uninterruptible power supply systems (UPSs). This need has driven the impetus of several topologies discussed in the technical literature, making this topic relevant in the field of power electronics. However, many existing DC-DC converters are only suitable for low-power applications. Thus, there is a search for new topologies that can be applied in higher power systems, with a viable amount of components and low voltage and current stresses on the semiconductors, in addition to having a good efficiency. This work develops a cell that gives rise to a family of converters based on a three-state switching cell (3SSC), employing coupled inductors and voltage multiplier cells (VMCs). This topology is able to provide a wide conversion rate, keeping the stresses on the semiconductors low. A proposed boost topology is studied in detail, with the presentation of its operating principle, qualitative analysis and quantitative analysis, considering its operation in continuous conduction mode (CCM). Theoretical results, simulation results, as well as experimental results are shown, followed by discussions that establish the advantages and disadvantages of this topology.