Full-Bridge ZVS-PWM Hybrid Switched-Capacitor Isolated DC-DC Converter

Anderson Alves; Ivo Barbi

doi:10.18618/REP.2022.3.0029

Authors

Anderson Alves Federal University of Santa Catarina (UFSC), Florianópolis - Santa Catarina, Brazil
Ivo Barbi Federal University of Santa Catarina (UFSC), Florianópolis - Santa Catarina, Brazil

DOI:

https://doi.org/10.18618/REP.2022.3.0029

Keywords:

Full-bridge ZVS-PWM converter, Hybrid Converter, Isolated DC-DC converter, Ladder cell, Switched-capacitor converter, Zero-Voltage-Switching

Abstract

This paper presents a new hybrid switched-capacitor (HSC) isolated DC-DC converter topology generated from the integration of the ladder switching cell with the full-bridge ZVS-PWM converter. This new topology reduces the voltage stress on the switches and other components on the primary side of the transformer to half of the bus voltage, spontaneously equalizes the voltage in the divider capacitors and presents zero-voltage-switching (ZVS) in all switches for a wide load range. The principle of operation, static gain, current stress in the power semiconductors, and commutation analysis are presented in this paper. A theoretical and experimental comparative analysis of the new topology with the TL-NPC converter is also performed. Experimental results with a laboratory prototype with 2 kW rated power, 800 V input voltage, 60 V output voltage and 100 kHz switching frequency show a maximum efficiency of 97.12% for the HSC converter against 96.49% for the TL-NPC converter.

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Author Biographies

Anderson Alves, Federal University of Santa Catarina (UFSC), Florianópolis - Santa Catarina, Brazil

was born in Florianópolis, Brazil. He received B.S. and M.S. degrees in electrical engineering from the Federal University of Santa Catarina (UFSC), Florianópolis, SC, Brazil, in 1999 and 2002, respectively.

He worked as a researcher for Whirlpool Latin America group, Joinville, Brazil, from 2002 to 2012 and 2013 to 2015. Since 2016 he has been a Professor with the Department of Electronics, Federal Institute of Santa Catarina (IFSC), Florianópolis, SC, Brazil.

He 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 (UFSC), Florianópolis - Santa Catarina, Brazil

was born in Gaspar, Brazil. He received B.S. and M.S. degrees in electrical engineering from the Federal University of Santa Catarina (UFSC), Florianópolis, SC, Brazil, in 1973 and 1976, respectively, and a 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. He served as an Associate Editor for the IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS and the IEEE TRANSACTIONS ON POWER ELECTRONICS for several years.

Prof. Barbi received the 2020 IEEE William E. Newell Power Electronics Award.

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