Hybrid Dual-Loop Control for Current Regulation and Low-Frequency Ripple Rejection in Led Drivers

Maikel F. Menke; J. Marcos Alonso; Rodrigo V. Tambara; Álysson R. Seidel

doi:10.18618/REP.2021.3.0010

Authors

Maikel F. Menke Federal Institute of Santa Catarina, Florianópolis – SC, Brazi and Federal University of Santa Maria, Santa Maria – RS, Brazil
J. Marcos Alonso University of Oviedo, Gijón, Astúrias, Spain
Rodrigo V. Tambara Federal Institute of Santa Catarina, Florianópolis – SC, Brazil
Álysson R. Seidel Federal Institute of Santa Catarina, Florianópolis – SC, Brazil

DOI:

https://doi.org/10.18618/REP.2021.3.0010

Keywords:

Current Ripple Reduction, Hybrid Control, LED Driver, LLC Resonant Converter

Abstract

This paper presents a new hybrid dual-loop control system for the DC/DC LLC resonant converter, operating as a downstream DC/DC converter in a two independent stage offline LED driver. The outer loop employs a PI controller to maintain the average LED current regulated at the reference value and reject parametric variation. The inner loop implements an adaptive periodic disturbance rejection (APDR) subsystem, thus conceiving the hybrid PI\&APDR controller. The APDR subsystem is designed to strictly reject the bus voltage ripple and limit its transmission to the LED current. Experimental results show the proposed controller feasibility in achieving good tracking behavior, reduced output current ripple under different bus voltage ripple amplitude and frequency, robustness against parametric variations, and simple implementation and design. For the sake of completeness, the proposed PI&APDR is compared with the conventional proportional resonant controller employing experimental results and extra analysis based on simulations.

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Author Biographies

Maikel F. Menke, Federal Institute of Santa Catarina, Florianópolis – SC, Brazi and Federal University of Santa Maria, Santa Maria – RS, Brazil

born in 1989, in Três de Maio - RS. He received the B.S., M.Sc., and Ph.D. degrees in electrical engineering from the Federal University of Santa Maria (UFSM), Santa Maria, Brazil, in 2015, 2016, and 2021, respectively. Since 2019, he is a Professor at the Federal Institute of Santa Catarina (IFSC). His research interests include lighting applications, dc-dc converters, power factor correction, resonant converters, and self-oscillating converters. Dr. Menke is member of the SOBRAEP, and IEEE.

J. Marcos Alonso, University of Oviedo, Gijón, Astúrias, Spain

received the M. Sc. Degree and Ph.D. Degree (with honors) both in electrical engineering from the University of Oviedo, Spain, in 1990 and 1994 respectively. Since 2007, he is a full Professor of the Electrical Engineering Department of the University of Oviedo. Prof. Alonso is co-author of more than 450 journal and conference publications, including more than 120 publications in highly referenced journals, 3 books and 2 book chapters. His research interests include lighting applications, dc-dc converters, power factor correction, resonant inverters, and single-phase power electronics in general. He is the holder of 8 national and international patents. Prof. Alonso holds 11 IEEE awards. He currently serves as a Co-Editor-in-Chief of the IEEE Transactions on Power Electronics and Associate Editor of the IEEE Journal on Emerging and Selected Topics on Power Electronics. He was the Chair of the IEEE IAS Industrial Lighting and Displays Committee.

Rodrigo V. Tambara, Federal Institute of Santa Catarina, Florianópolis – SC, Brazil

was born in Santa Maria, Brazil, in 1987. He received the B.S., M.Sc., and Ph.D. degrees in electrical engineering from the Federal University of Santa Maria, Santa Maria, Brazil, in 2008, 2010, and 2014, respectively.

From 2014 to 2016, he was an Adjunct Professor with the Universidade Franciscana, Santa Maria, Brazil. From 2016 to 2018, he was an Adjunct Professor with the Federal University of Santa Maria, Cachoeira do Sul, Brazil. Currently, he is with the Federal University of Santa Maria, where he is a Adjunct Professor with the Colégio Técnico Industrial de Santa Maria. He has been a Researcher with Power Electronics and Control Group (GEPOC) since 2004, and with the Electrical and Computational Systems Research and Development Group (GSEC) since 2015. His research interests include adaptive control, grid-connected converters, dimming systems, and LED drivers. Dr. Tambara is a member of the Brazilian Power Electronics Society and also a member of the Brazilian Automatic Control Society.

Álysson R. Seidel, Federal Institute of Santa Catarina, Florianópolis – SC, Brazil

was born in São Pedro do Sul, Brazil, in 1975. He received the B.S. and Ph.D. degrees in electrical engineering from the Federal University of Santa Maria, Santa Maria, Brazil, in 1999 and 2004, respectively.

From 2004 to 2008, he was an Associate Professor in the Department of Electrical Engineering, University of Passo Fundo, Passo Fundo, Brazil. Currently, he is at Federal University of Santa Maria, where he is a Professor at the Technical Industrial School of Santa Maria and a Researcher in Electronic Ballast Research Group (GEDRE) since 1997 and Electrical and Computational Systems Research and Development Group (GSEC) since 2010. His research interests include resonant converters, dimming systems, simulation, discharge lamps, and lighting systems.

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