A Single-phase Inverter Based on Full-bridge Modules With Input in Series-connection and Outputs Coupled by a Multiple-winding Transformer

Adriano Ruseler; Telles Brunelli Lazzarin; Ivo Barbi

doi:10.18618/REP.2015.3.2545

Authors

Adriano Ruseler Federal University of Santa Catarina – UFSC, Postgraduate Program in Electrical Engineering – PGEEL
Telles Brunelli Lazzarin Federal University of Santa Catarina – UFSC, Postgraduate Program in Electrical Engineering – PGEEL
Ivo Barbi Federal University of Santa Catarina – UFSC, Postgraduate Program in Electrical Engineering – PGEEL

DOI:

https://doi.org/10.18618/REP.2015.3.2545

Keywords:

High–input Voltage, Magnetically– connected Outputs, Multilevel Inverter, Multiple–winding Transformer, Series–connected Inputs

Abstract

This paper proposes an isolated modular single–phase inverter for high–input voltage applications. The topology is composed of conventional and modular full–bridge inverters with series–connected inputs and magnetically–connected outputs. All input bus capacitors are connected in series and thus the dc voltage is divided among the inverter modules. The full–bridge outputs are connected by a multiple–winding low– frequency transformer, the inverters employ a typical three–level modulation with phase–shift carriers and when an appropriate modulation is used a multilevel output voltage is supplied for the load. The auto–balance of the input capacitor voltages is verified and a harmonic analysis is performed in order to investigate the exchange of active and reactive power between the inverter modules at low and high frequency. An 8 kW prototype with three modules, a multiple–winding transformer with a transform ratio of 1:1:1:1, 1200 V dc input source and 220 V/ 60 Hz ac output voltage was built and tested in order to verify the proposed topology.

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Author Biographies

Adriano Ruseler, Federal University of Santa Catarina – UFSC, Postgraduate Program in Electrical Engineering – PGEEL

was born in Presidente Getúlio, Santa Catarina, Brazil, in 1982. He received the B.S. and M.S. degrees in Electrical Engineering from the Federal University of Santa Catarina, Florianópolis, Brazil, in 2008 and 2011 respectively. He is currently a Ph.D. student at the Power Electronics Institute, Federal University of Santa Catarina, Brazil. His interests include power conversion, AC machines modeling, power converter modeling, and renewable energy sources. M. Eng. Ruseler is a student member of the Brazilian Power Electronic Society (SOBRAEP), IEEE Power Electronics Society (PELS) and IEEE Industrial Electronics Society (IES

Telles Brunelli Lazzarin, Federal University of Santa Catarina – UFSC, Postgraduate Program in Electrical Engineering – PGEEL

was born in Criciúma, Santa Catarina State, 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 at the Federal University of Santa Catarina (UFSC), Florianópolis, Brazil. His interests include inverters, parallel operation of inverters, UPS, high–voltage dc–dc converters, direct ac–ac power converters, switched–capacitor converters and hybrid switched–capacitor converters. Prof. Dr. Lazzarin is a member of the Brazilian Power Electronic Society (SOBRAEP), IEEE Power Electronics Society (PELS) and IEEE Industrial Electronics Society (IES).

Ivo Barbi, Federal University of Santa Catarina – UFSC, Postgraduate Program in Electrical Engineering – PGEEL

was born in Gaspar, Santa Catarina, Brazil, in 1949. He received a B.S. and a M.S. degree 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, France, in 1979. He founded the Brazilian Power Electronics Society and the Power Electronics Institute of the Federal University of Santa Catarina. He is currently a visiting professor of the Department of Automation and Systems (DAS), Federal University of Santa Catarina. Prof. Dr. Barbi is a member of SOBRAEP, IEEE Power Electronics Society and IEEE Industrial Electronics Society. Associate Editor of the IEEE Transactions on Power Electronics and Fellow IEEE.

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