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

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 3SS...

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Bibliographic Details
Published in:Energies (Basel) 2022-10, Vol.15 (20), p.7710
Main Authors: Souza, Lucas Carvalho, Silva, Luciano de Souza da Costa e, Seixas, Falcondes José Mendes de, Arenas, Luis De Oro
Format: Article
Language:English
Subjects:
3SSC type-A
Analysis
buck converter
buck-boost converter
DC–DC converter
Diodes
Efficiency
Electric current converters
Electric potential
Electronics industry
Frequency dependence
Frequency response
Load
Prototypes
Semiconductors
Simulation models
Stress management
three-state switching cell (3SSC)
Topology
Voltage
Voltage converters (DC to DC)
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Summary: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%.
ISSN:1996-1073
1996-1073
DOI:10.3390/en15207710