Double Modulation Applied to a High Power Factor Rectifier with High Frequency  Transformer for Ups Application

Daniel B. de Alvarenga; Martin B. Meier; Roger Gules; Alceu A. Badin; Eduardo F. R. Romaneli

doi:10.18618/REP.2018.1.2721

Authors

Daniel B. de Alvarenga NHS Sistemas de Energia, Curitiba - PR, Brazil
Martin B. Meier Federal University of Technology - UTFPR/CPGEI/PPGSE, Curitiba - PR, Brazil
Roger Gules Federal University of Technology - UTFPR/CPGEI/PPGSE, Curitiba - PR, Brazil
Alceu A. Badin Federal University of Technology - UTFPR/CPGEI/PPGSE, Curitiba - PR, Brazil
Eduardo F. R. Romaneli Federal University of Technology - UTFPR/CPGEI/PPGSE, Curitiba - PR, Brazil

DOI:

https://doi.org/10.18618/REP.2018.1.2721

Keywords:

AC-DC Power Conversion, Digital control, Rectifiers

Abstract

The bridgeless boost-full-bridge rectifier is used as preregulator for a high frequency isolated UPS and the asymmetric pulse width modulation (APWM) modulation is applied in order to obtain a high quality input current with high power factor. The rectifier operates with soft-switching and reduced conduction losses improving the efficiency. A simultaneous phase-shift modulation allows obtain a fast output voltage control and step-up/step-down static gain, becoming possible the operation in a wide voltage range. An auxiliary power feed-forward action allows improving the dynamic response of the output voltage and primary side DC-bus voltage for the load transient. The double modulation and the auxiliary control action reduce the DC-bus voltage overshoot and undershoot during the output load transients, reduce the converter filters capacitance and limit the maximum voltage across the switches. The theoretical analysis and design procedure are presented for the modulations proposed and the experimental results were obtained from a 2 kW prototype operating with switching frequency equal to 44 kHz. The experimental results are presented using four different combinations of control structures showing comparatively the dynamic improvements.

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Author Biographies

Daniel B. de Alvarenga, NHS Sistemas de Energia, Curitiba - PR, Brazil

was born in Curitiba-PR, Brazil. He received the M.Sc. degrees in Electrical Engineering from Federal University of Tecnology - Paraná, Brazil, in 2014. Currently, he is Research and Development Senior Engineer at NHS company and owner of EGNEX, a smart energy solutions company, Brazil. His research interests UPS systems, soft-switching techniques and converters for renewable energy sources.

Martin B. Meier, Federal University of Technology - UTFPR/CPGEI/PPGSE, Curitiba - PR, Brazil

was born in Campinas, Brazil in 1988. He received the B.S. degree in electrical engineering with control and automation emphasis from the Federal University of Technology of Paraná, Brazil in 2013. He is currently working toward his M.S. degree in Power Electronics in the same university, and works at MB Tech, developing solar inverters. His main research interests includes rectifiers and multilevel topologies for UPS and solar applications.

Roger Gules, Federal University of Technology - UTFPR/CPGEI/PPGSE, Curitiba - PR, Brazil

was born in Bento Gonçalves, RS, Brazil, in 1971. He received the B.S. degree from the Federal University of Santa Maria, Brazil and the M.S. and Ph.D. degrees from the Federal University of Santa Catarina, Brazil, in 1998 and 2001, respectively. Since 2006 he has been at Federal Technological University of Paraná, Brazil as Professor. His research interests include high frequency power conversion and renewable energy applications.

Alceu A. Badin, Federal University of Technology - UTFPR/CPGEI/PPGSE, Curitiba - PR, Brazil

was born in Maravilha, Santa Catarina, Brazil, in 1979. He received the B.S., M.S. and Ph.D. degrees in electrical engineering from the Federal University of Santa Catarina, Florianopolis, Brazil, in 2002, 2004, and 2009, respectively. Since 2010, he has been a Professor at the Federal Technological University of Paraná, Curitiba, Brazil. His current research interests include high-frequency power converter topologies, power factor correction techniques and power supplies. Prof. Badin is a member of the Brazilian Power Electronics Society (SOBRAEP).

Eduardo F. R. Romaneli, Federal University of Technology - UTFPR/CPGEI/PPGSE, Curitiba - PR, Brazil

received the B.S. degree, and the Master’s and Doctorate degrees in electrical engineering from the Federal University of Santa Catarina, Florianopolis, Brazil, in 1993, 1998, and 2001, respectively. Since 2003, he has been a Full-Time Professor at the Federal University of Technology - Paraná, Curitiba, Brazil. His current research interests are focused but not restricted to uninterruptible power system (UPS), power-factor correction and renewable energies.

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