3SSC-A-Based Step-Down DC–DC Converters: Analysis, Design and Experimental Validation

Lucas Carvalho Souza, Luciano de Souza da Costa e Silva, Falcondes José Mendes de Seixas () and Luis De Oro Arenas
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Lucas Carvalho Souza: Power Electronics Laboratory —LEP, Electrical Engineering Department, São Paulo State University—UNESP, Ilha Solteira 15385-000, SP, Brazil
Luciano de Souza da Costa e Silva: Mato Grosso do Sul Federal Institute of Education, Science, and Technology, Três Lagoas 79641-162, MS, Brazil
Falcondes José Mendes de Seixas: Power Electronics Laboratory —LEP, Electrical Engineering Department, São Paulo State University—UNESP, Ilha Solteira 15385-000, SP, Brazil
Luis De Oro Arenas: Group of Automation and Integrated Systems, São Paulo State University—UNESP, Sorocaba 18087-180, SP, Brazil

Energies, 2022, vol. 15, issue 20, 1-21

Abstract: This paper proposes two non-isolated step-down DC–DC converters based on the type-A three-state switching cell (3SSC-A), resulting in an alternative to the buck and buck-boost classical converters, respectively. The proposed topologies are part of a group of unexplored converters that employ the 3SSC-A, which has the advantages of 3SSC-based converters, such as high power density, reduced current stress on the semiconductors and suitable thermal loss distribution. In this regard, a complete static analysis is performed, including a detailed study of all semiconductor voltage and current efforts and developing loss models for each one. Moreover, by using simulation models, AC sweep analyses validate the dynamic frequency response of each converter’s small-signal models, and PI-based output–voltage closed-loop controllers are duly designed. Finally, the topologies are experimentally validated through the implementation of adequately designed prototypes, achieving efficiency values greater than 91% under several output power rates varying from 50% to 100%.

Keywords: buck converter; buck-boost converter; DC–DC converter; three-state switching cell (3SSC); 3SSC type-A (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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