Isolated Zvs-Pwm DC-DC Converter Based on the Variable Capacitor Technique

Angélica P. Caús; Ivo Barbi

doi:10.18618/REP.2023.3.0012

Authors

Angélica P. Caús Federal University of Santa Catarina, Florianópolis-SC, Brazil
Ivo Barbi Federal University of Santa Catarina, Florianópolis-SC, Brazil

DOI:

https://doi.org/10.18618/REP.2023.3.0012

Abstract

This paper introduces a new static power conversion principle, based on the variable capacitance of a capacitor arrangement. As an example of the proposed technique, an isolated ZVS-PWM dc-dc converter topology is proposed. Circuit operation and theoretical analysis, with emphasis on the soft-commutation process, are included in the paper. To validate the theoretical analysis and verify the operation of the converter, a proof-of-concept experimental prototype with 960W power rating, 400 V input voltage, 48 V output voltage and 100 kHz switching frequency was designed, constructed and tested in a laboratory. An additional attribute of the proposed technique is the reduction of the voltage across the power semiconductors to two-thirds of the dc bus voltage, when the duty cycle is equal to 0.5. The proposed technique can be extended and used to generate several other topologies of isolated and nonisolated dc-dc converters.

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Author Biographies

Angélica P. Caús, Federal University of Santa Catarina, Florianópolis-SC, Brazil

was born in Rondinha, Brazil, She received the B.S. degree in electrical engineering from the University of Passo Fundo (UPF), Passo Fundo, Brazil, in 2018, and the M.S. degree in electrical engineering from the Federal University of Santa Catarina (UFSC), Florianópolis, Brazil, in 2020. She is currently a PhD student in Electrical engineering at UFSC, in the Power Electronics and Electrical Drives area.

Ivo Barbi, Federal University of Santa Catarina, Florianópolis-SC, Brazil

(Life Fellow, IEEE) was born in Gaspar, Brazil. He received the B.S. and M.S. degrees in electrical engineering from the Federal University of Santa Catarina (UFSC), Florianópolis, Brazil, in 1973 and 1976, respectively, and the Dr.Ing. degree in electrical engineering from the Institut National Polytechnique de Toulouse (INPT), Toulouse, France, in 1979. He founded the Brazilian Power Electronics Society (SOBRAEP), the Brazilian Power Electronics Conference (COBEP), in 1990, and the Brazilian Power Electronics and Renewable Energy Institute (IBEPE), in 2016. He is currently a Researcher with the Solar Energy Research Center and a Professor Emeritus in electrical engineering with UFSC. Prof. Barbi received the 2020 IEEE William E. Newell Power Electronics Award. He serves as an Associate Editor for the IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS and the IEEE TRANSACTIONS ON POWER ELECTRONICS for several years.

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