Conversores CC-CC não isolados com ampla taxa de conversão baseados na célula de comutação de múltiplos estados e células multiplicadoras de tensão

Abstract

This work presents the study and design of a family of non-isolated high step-up dc-dc converters, based on the multi-state switching cell (MSSC) and voltage multiplier cells (VMCs). These converters can be used in applications such as uninterruptible power systems and electric vehicles, which employ a few kilowatts power and require high voltage gain. Inherent advantages in the proposed topologies include reduced current and voltage stresses on the semiconductors, improved thermal distribution, good current sharing among the phases, and reduced dimensions of filter elements. Another relevant aspect is that the derived converters present modularity in terms of the possibility of extending not only the voltage gain, but also the rated power. A comprehensive theoretical analysis of the 4SSC-VMC boost converter, deriving from the proposed family, is performed. Experimental results obtained from a 1.3 kW prototype are presented and discussed to validate the theoretical assumptions.