A Single-Phase Hybrid Switched-Capacitor Inverter For High Step-Down Applications

Rodrigo de Souza Santos; Telles Brunelli Lazzarin; Ivo Barbi

doi:10.18618/REP.2017.4.2710

Authors

Rodrigo de Souza Santos INEP/PGEEL - Federal University of Santa Catarina (UFSC), Florianópolis – SC, Brazil
Telles Brunelli Lazzarin INEP/PGEEL - Federal University of Santa Catarina (UFSC), Florianópolis – SC, Brazil
Ivo Barbi DAS/PGEEL - Federal University of Santa Catarina (UFSC), Florianópolis – SC, Brazil

DOI:

https://doi.org/10.18618/REP.2017.4.2710

Keywords:

High Step-Down Applications, Hybrid Switched-Capacitor, inverter, Pulse-Width Modulated Inverters, Switched capacitor

Abstract

In this paper, a novel single-phase inverter topology is proposed, which was derived from the integration of the conventional voltage source inverter (VSI) with switched-capacitor (SC) dc-dc converters. The inverter circuit can provide a low ac output voltage from a high dc input voltage, using low-voltage devices (switches and capacitors). The modulation scheme is the same employed in conventional inverters and the capacitor voltages are self- balanced. The proposed topology is suitable for applications with high conversion ratios. A 2.5 kW prototype (800 V/220 V), which achieved a peak efficiency of 97.8 %, was built to show the feasibility of the novel inverter.

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Author Biographies

Rodrigo de Souza Santos, INEP/PGEEL - Federal University of Santa Catarina (UFSC), Florianópolis – SC, Brazil

was born in São Paulo, Brazil, in 1986. He received the B.S. degree from the São Paulo Engineering College, São Paulo (SP), Brazil, and the M.S. degree in 2013 from the Federal University of Santa Catarina, Florianópolis (SC), Brazil, both in electrical engineering. He is currently working toward the Ph.D. degree in electrical engineering at the Power Electronics Institute of Federal University of the Santa Catarina. His interests include dcdc bidirectional converters, switched-capacitor converters, and current source converters.

Telles Brunelli Lazzarin, INEP/PGEEL - Federal University of Santa Catarina (UFSC), Florianópolis – SC, Brazil

was born in Criciúma, Brazil, in 1979. He received the B.Sc., M.Sc., and Ph.D. degrees in electrical engineering from the Federal University of Santa Catarina (UFSC), Florianópolis, Brazil, in 2004, 2006, and 2010, respectively. He is currently an Adjunct Professor with the UFSC. His interests include inverters, parallel operation of inverters, UPS, high-voltage dc-dc converters, direct ac-ac power converters, switched capacitor (SC) converters, and hybrid SC converters. Dr. Lazzarin is a member of the Brazilian Power Electronics Society (SOBRAEP), IEEE Power Electronics Society (PELS), and IEEE Industrial Electronics Society (IES).

Ivo Barbi, DAS/PGEEL - Federal University of Santa Catarina (UFSC), Florianópolis – SC, Brazil

was born in Gaspar, Santa Catarina, Brazil, in 1949. He received the B.S. and M.S. degrees in electrical engineering from the Federal University of Santa Catarina, Florianópolis, Brazil, in 1973 and 1976, respectively, and the Dr. Ing. degree from the Institut National Polytechnique de Toulouse, Toulouse, France, in 1979. He founded the Brazilian Power Electronics Society (SOBRAEP) and the Brazilian Power Electronics Conference (COBEP) in 1990, and the Brazilian Power Electronics and Renewable Energy Institute (IBEPE) in 2016. Prof. Barbi is an Associate Editor of the IEEE Transactions on Power Electronics and the IET Electronics Letters, President of the Brazilian Power Electronics and Renewable Energy Institute (IBEPE), researcher at the Solar Energy Research Center and Professor of Electrical Engineering at Federal University of Santa Catarina (Brazil).

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