Transformerless Step-Up Inverter Based On Switched-Capacitor Converter Technology

Neilor Colombo Dal Pont; Gierri Waltrich; Telles Brunelli Lazzarin

doi:10.18618/REP.2017.3.2685

Authors

Neilor Colombo Dal Pont Federal University of Santa Catarina, Department of Electrical Engineering, Florianópolis-SC, Brazil
Gierri Waltrich Federal University of Santa Catarina, Department of Mobility Engineering, Joinville-SC, Brazil
Telles Brunelli Lazzarin Federal University of Santa Catarina, Department of Electrical Engineering, Florianópolis-SC, Brazil

DOI:

https://doi.org/10.18618/REP.2017.3.2685

Keywords:

Linear Gain, Step-up inverter, Switched capacitor, Transformerless

Abstract

In this paper the integration between a voltage source inverter (VSI) and a switched capacitor converter (SCC) is proposed to generate a sinusoidal waveform with a double peak voltage value at the converter output terminal, without the use of a transformer or a dc-dc boost converter. The novel structure (VSI-SCC) is designed as a transformerless step-up inverter with linear gain. VSI and SCC models are individually characterized to integrate both structures in only one model. To validate the theoretical analysis a prototype was designed for a power of 1 kW, considering a dc input voltage of 200 V and an ac output voltage of 220 V (rms). In this prototype the VSI converter supplies 110 V (rms) to the SCC converter, and this converter step-up it to 220 V (rms). Furthermore, open and closed-loop control were also tested in the prototype reaching a maximum efficiency of 90%.

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Author Biographies

Neilor Colombo Dal Pont, Federal University of Santa Catarina, Department of Electrical Engineering, Florianópolis-SC, Brazil

was born in Criciúma, Santa Catarina State, Brazil, in 1989. He received the B.Sc. degree in Electrical Engineering from the Federal University of Santa Catarina (UFSC), Florianópolis, Brazil, in 2015.nHe is currently doing master’s degree at the Department of Electrical and Electronic Engineering (EEL) from the UFSC, at the Power Electronics Institute (INEP). His interests include switched-capacitor converters, inverters, high-voltage dc-dc converters and grid connected systems.

Gierri Waltrich, Federal University of Santa Catarina, Department of Mobility Engineering, Joinville-SC, Brazil

was born in Joaçaba, Brazil, in 1979. He received the B.S. and M.S. degrees in electrical engineering from the Federal University of Santa Catarina, Florianópolis, Brazil, in 2007 and 2009, respectively, and the Ph.D. degree from Eindhoven University of Technology, Eindhoven, The Netherlands, in 2013, all in electrical engineering. He is currently an Assistant Professor with the Federal University of Santa Catarina, Joinville, Brazil.

Telles Brunelli Lazzarin, Federal University of Santa Catarina, Department of Electrical Engineering, Florianópolis-SC, Brazil

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 Department of Electrical and Electronic Engineering (EEL) from the UFSC, and he also works as a Researcher at the Power Electronics Institute (INEP), UFSC. His interests include switched-capacitor converters, inverters, rectifiers, parallel operation of converters, high-voltage dc-dc converters and conversion systems for small wind turbines. Dr Lazzarin is a member of the Brazilian Power Electronic Society (SOBRAEP), IEEE Power Electronics Society (PELS) and IEEE Industrial Electronics Society (IES).

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