NOVEL BUCK-BOOST PFC CONVERTER WITH THREE-STATE SWITCHING CELL

In this paper, a buck-boost converter with power factor correction is proposed, using a three-state switching cell named of B configuration, operating in continuous conduction mode. The type B cell insertion on the buck-boost converter keeps conventional structure statistic characteristics and brings as advantage, stress current division in all semiconductors by half inductor current. Moreover, the ripple frequency on converter energy storage elements will be twice switching frequency value, making easier the design of input and output passive filters and reducing the converter final volume and weight. Preliminary simulation results prove the converter effectiveness on power factor correction, keeping output voltage stable in a specified operation point, with a total harmonic distortion of input current below 1.5%.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Sao Paulo State Univ, UNESP, Sch Engn, Sao Paulo, BrazilFed Inst Goias IFG, Jatai, Go, BrazilSao Paulo State Univ, UNESP, Sch Engn, Sao Paulo, BrazilCAPES: 00

A NON-ISOLATED DC-DC BOOST CONVERTER WITH THREE-STATE SWITCHING CELL

This paper presents a boost converter based on the three-state switching cell (3SSC), which has been widely used in the design of several topologies of electronic power converters. The structure is part of a family of non-isolated DC-DC converters that has been reported previously in the literature, however, detailed modeling and analysis have not been presented before. The topology consists of type-A cell, one of the five variants of 3SSC. This structure has the advantages associated to the use of 3SSC, such as reduction of the current stress in semiconductors and distribution of losses on them. A qualitative analysis in continuous conduction mode is performed, the control pulses of the main switches being non-overlapping, the operational stages are analyzed and a design procedure is obtained. The modeling of the topology is performed, obtaining the small-signal model of the converter. Experimental results are presented and duly discussed to validate the theoretical assumptions.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Instituto Federal de Educacao, Ciencia e Tecnologia de Goias, Campus JataiSao Paulo State Univ, UNESP, Sch Engn, Sao Paulo, BrazilFed Inst Goias IFG, Jatai, Go, BrazilSao Paulo State Univ, UNESP, Sch Engn, Sao Paulo, BrazilCAPES: 00