Resumo:
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.
