Isolated Single-phase High Power Factor Rectifier Using Zeta Converter Operating in DCM With Non-Dissipative Snubber

Alan D. Callegaro; Denizar C. Martins; Ivo Barbi

doi:10.18618/REP.2014.4.423429

Authors

Alan D. Callegaro Federal University of Santa Catarina EEL - INEP
Denizar C. Martins Federal University of Santa Catarina EEL - INEP
Ivo Barbi Federal University of Santa Catarina EEL - INEP

DOI:

https://doi.org/10.18618/REP.2014.4.423429

Keywords:

AC-DC converter, Discontinuous Conduction Mode, High-Frequency Insulation, Power Factor Correction - PFC, Single-Stage, Zeta Converter

Abstract

This paper presents the study of a single-stage, single-phase, unity power factor converter, isolated by a high frequency transformer, based on a Zeta converter operating in discontinuous conduction mode (DCM). The main feature of the proposed converter is its ability to naturally emulate an apparent resistance to the ac input source, without current sensor or current controller. Circuit operation, theoretical analysis and design example are included in this paper, along with experimental results taken from a laboratory prototype rated at 400W, input voltage equal to 127 V, output voltage equal to 200 V, switching frequency of 25 kHz and efficiency of 92 %. In order to reduce the commutation losses and limit the peak voltage across the power semiconductors, a non- dissipative snubber has been included in the laboratory prototype. With the advent of new low losses power semiconductor technologies, such as SiC and GaN, power converters operating in DCM will become very attractive, due to their simplicity and robustness, even for high power applications. This is the main motivation of the study presented hereafter.

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Author Biographies

Alan D. Callegaro, Federal University of Santa Catarina EEL - INEP

was born in Ijuí, Rio Grande do Sul, Brazil, in 1985. He received the B.S. degree in electrical engineering and the M.S. degree from the Federal University of Santa Catarina (UFSC), Florianopolis, Brazil, in 2011 and ´ 2013, respectively. He is currently a researcher engineer at the Power Electronics Institute (INEP) at UFSC. His interests include ac-dc power conversion, power converter modeling, and renewable energy sources.

Denizar C. Martins, Federal University of Santa Catarina EEL - INEP

was born in Sao Paulo, Brazil, on April 24, 1955. He received the B.S. and M.S. degrees in electrical engineering from the Federal University of Santa Catarina (UFSC), Florianpolis, Brazil, in 1978 and 1981, respectively, and the Ph.D. degree in electrical engineering from the Polytechnic National Institute of Toulouse, Toulouse, France, in 1986. He is currently a Professor with the Department of Electrical Engineering, UFSC. His interest research areas include dc-dc and dc-ac converters, high frequency soft commutation, power factor correction, and grid-connected photovoltaic systems.

Ivo Barbi, Federal University of Santa Catarina EEL - INEP

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, Florianopolis, 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 and the Power Electronics Institute in the Federal University of Santa Catarina, where he is currently a Professor.

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