Bidirectional Switched Capacitor DC-DC Converter Based on Three Level Connection

Wellington Arthur Licht Nachau; Diogo Ribeiro Vargas; Gustavo Guilherme Koch; Antonio Manuel Santos Spencer Andrade

doi:10.18618/REP.2005.2.045052

Authors

Wellington Arthur Licht Nachau Universidade Federal do Rio Grande do Sul https://orcid.org/0009-0004-4758-4602
Diogo Ribeiro Vargas Universidade Federal de Santa Maria https://orcid.org/0000-0002-0705-8112
Gustavo Guilherme Koch Universidade Federal de Santa Maria https://orcid.org/0000-0003-4654-7776
Antonio Manuel Santos Spencer Andrade Universidade Federal do Rio Grande do Sul https://orcid.org/0000-0001-6098-0475

DOI:

https://doi.org/10.18618/REP.2005.2.045052

Keywords:

Bidirectional current flow, dc-dc converter, modular circuit, switched capacitor

Abstract

In this paper a pure bidirectional switched capacitor DC-DC converter is proposed. This structure of the proposed converter allows parallel and cascade modular connection, which allows its use in different applications. The basic cell of the proposed topology is evaluated in detail in this paper. For this, characteristics of the principle of operation for step-up and step-down mode, voltage gain, voltage and current stresses, comparative evaluations with similar topologies are presented. To validate the effectiveness of the proposed converter, a prototype was built in laboratory and it achieves a 94.8 % peak efficiency with a switching frequency equal to 20 kHz.

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Author Biographies

Wellington Arthur Licht Nachau, Universidade Federal do Rio Grande do Sul

was born in Cacheira do Sul. He graduated in Electrical Engineering from UFSM in 2023. He is currently a master's student at UFRGS. His research interests include Renewable Energy, Bidirectional Converters, Switched Capacitors.

Diogo Ribeiro Vargas, Universidade Federal de Santa Maria

received the B.S. and M.S. Ph.D. degrees in electrical engineering in 2009, 2012 and 2017, respectively, from the Federal University of Santa Maria, Santa Maria, Brazil. Since 2021, he has been an Assistant Professor with the Department of Electrical Engineering, Federal University of Santa Maria, Cachoeira do Sul, Brazil. His research interests include embedded systems, lighting systems.

Gustavo Guilherme Koch, Universidade Federal de Santa Maria

has a bachelor's degree (2013), master's degree (2015), doctorate (2019) and post-doctorate (2020) in Electrical Engineering from the Federal University of Santa Maria, working with GEPOC. Since 2023, he has been a professor at UFSM. His research interests include robust control and applied control.

Antonio Manuel Santos Spencer Andrade, Universidade Federal do Rio Grande do Sul

was born in Ribeira Grande, Cabo Verde. He received his Bachelor’s degree in Automation and Control Engineering from the University of Caxias do Sul, Caxias do Sul, Brazil, in 2012, and his Master’s and Ph.D. degrees in Electrical Engineering from the Federal University of Santa Maria, Santa Maria, Brazil, in 2015 and 2018, respectively. From 2018 to 2023, he has been a professor at UFSM. Since 2023, he has been a professor at UFRGS. He serves as an Associate Editor for the International Journal of Circuit Theory and Applications and Applied Sciences in the special edition "Renewable and Sustainable Energy Conversion Systems." He was also selected as a Distinguished Reviewer for 2020 by the IEEE Transactions on Power Electronics. His research interests include renewable energy, energy storage systems, DC-DC converters, and microinverters. Dr. António is a member of SOBRAEP and several IEEE societies.

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