Multi-state and Interleaved Converters With Passive Impedances for Current Sharing

René P. T. Bascopé; Grover V. T. Bascopé; Francisco J. B. Brito Jr.; Sérgio Daher

doi:10.18618/REP.2014.3.252259

Authors

René P. T. Bascopé Energy Processing and Control Group (GPEC), Electrical Engineering Department, Federal University of Ceará
Grover V. T. Bascopé Department of Research and Development, GTB Power Electronics R&T AB Sibeliusgangen, Kista - Sweden
Francisco J. B. Brito Jr. Energy Processing and Control Group (GPEC), Electrical Engineering Department, Federal University of Ceará
Sérgio Daher Energy Processing and Control Group (GPEC), Electrical Engineering Department, Federal University of Ceará

DOI:

https://doi.org/10.18618/REP.2014.3.252259

Keywords:

Current sharing, Interleaved Converters, Multi-State Converters, Switching Cell, Passive Impedance

Abstract

This paper presents multilevel switching cells that allow the generation of high-power nonisolated dc-dc, ac-dc, dc-ac, and ac- ac converters. The cells are classified in two groups: multi-state switching cells (MSSC) based on autotransformer and interleaved switching cells (ISC) based on inductors. Each switching cell has an impedance based on a small inductor Lsh connected between the legs, which is named current sharing circuit (CSC) and guarantees zero average voltage across the involved magnetic components, therefore compensating eventual differences between the PWM (pulse width modulation) duty cycles. The small inductor causes the duty cycle to be reduced, and consequently its inductance is typically very small. In order to verify the current sharing between the magnetic components, two dc-dc buck converters operating at 25 kHz and rated at 1 kW, where the input voltage is 200 V and the output voltage is 60 V , are implemented and evaluated in laboratory.

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Author Biographies

René P. T. Bascopé, Energy Processing and Control Group (GPEC), Electrical Engineering Department, Federal University of Ceará

received the B.Sc. degree in Electrical Engineering from San Simón University, Cochabamba, Bolívia, in 1992, and the M.Sc. and Dr. degrees in electrical engineering from the Federal University of Santa Catarina, Florianópolis, Brazil, in 1994 and 2000, respectively. He is currently an Associate Professor with the Department of Electrical Engineering, Federal University of Ceará, Fortaleza, Brazil. His main research interests include power supplies, power factor correction techniques, uninterruptible power systems, and renewable energy systems. Dr. Torrico-Bascopé is a member of the Brazilian Society of Power Electronics

Grover V. T. Bascopé, Department of Research and Development, GTB Power Electronics R&T AB Sibeliusgangen, Kista - Sweden

received the B.Sc. degree in Electrical Engineering from San Simón University, Cochabamba, Bolívia, in 1993, and the M.Sc. and Dr. degrees in Electrical Engineering from the Federal University of Santa Catarina, Florianópolis, Brazil, in 1996 and 2001, respectively. From 2001 to 2002, he was an Advisor with Emerson Energy System, Brazil. In 2003, he was a Senior Design Engineer with Emerson Network Power Company, Ltd., Stockholm, Sweden. From 2004 to 2009, he was a Senior Engineer in Power Electronics Designs with the R&D Group, Eltek Valere AB, Sweden. Since July 2009, he has been a Senior Design Engineer with GTB Power Electronics Research and Technology AB, Kista, Sweden. He has published more than 20 technical papers and is the holder of two patents. His main research areas are industrial power electronics and creation of new platforms with high efficiency topologies for high-power and green energy applications.

Francisco J. B. Brito Jr., Energy Processing and Control Group (GPEC), Electrical Engineering Department, Federal University of Ceará

was born in Nova Olinda - CE, Brazil, in 1989. He received the B.Tech. degree in Industrial Automation from the Federal Institute of Ceará, Juazeiro do Norte, Brazil, in 2010 and the M.Sc. degree in Electrical Engineering from the Federal University of Ceará, Fortaleza, Brazil, in 2013. He is currently pursuing his doctoral degree in Electrical Engineering from the Federal University of Ceará and develops researches with the Energy Processing and Control Group (GPEC). His research areas include power electronics converters, series and parallel connection of power converters, and high-efficiency topologies. MSc. Brito Jr. is student member of the IEEE Power Electronics Society (PELS) and the Brazilian Society of Power Electronics (SOBRAEP).

Sérgio Daher, Energy Processing and Control Group (GPEC), Electrical Engineering Department, Federal University of Ceará

was born in Fortaleza, Brazil, in 1971. Received the B.Sc. degree in electrical engineering from Federal University of Paraíba - Brazil in 1995, M.Sc. degree in electrical engineering from Federal University of Ceará, Brazil in 1997, and Dr.-lng. degree in electrical engineering from Universitat Kassel - Germany in 2006. Currently, he is a senior lecturer at the Federal University of Ceará. His research areas include Electrical Machines Drives, Power Electronics and Renewable Energy Systems.

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