TÉCNICA DE CONMUTACIÓN SUAVE PARA UN CONVERTIDOR REDUCTOR-ELEVADOR DOBLE CON APLICACIONES EN ILUMINACIÓN

Pablo Israel Guzmán Tafoya, Nimrod Vázquez Nava, René Osorio Sánchez

Resumen


Resumen

En este artículo se presenta una técnica de conmutación suave para el convertidor Reductor-Elevador Doble (CRED) con aplicación en lámparas LED. El convertidor consta de un convertidor Reductor-Elevador de dos etapas que presenta un interruptor principal y salida positiva. La primera etapa, conectada a la red eléctrica, contiene un inductor que opera en modo de conducción discontinua (MCD), permitiendo alcanzar naturalmente un factor de potencia elevado. La segunda etapa busca mejorar la respuesta dinámica de la corriente en la lámpara LED de 69 W trabajando en modo de conducción continua (MCC), obteniendo así, un rizo de corriente pequeño a la salida del convertidor. La topología, al ser una integración de dos convertidores, presenta una concentración de esfuerzos en el interruptor cuando se activa con conmutación dura. La técnica de conmutación suave propuesta consiste en un snubber activo de voltaje y un snubber pasivo de corriente que busca modificar las señales en el transistor, de voltaje en el apagado y de corriente en el encendido. Simulaciones en el software PSim son utilizadas para demostrar el funcionamiento de los circuitos auxiliares.

Palabras Claves: Corriente, interruptor, reductor-elevador, snubber, voltaje.

 

SOFT SWITCHING TECHNIQUE FOR A DOUBLE -STEP-DOWN CONVERTER WITH LIGHTING APPLICATIONS


Abstract

In this paper, a soft switching technique for a LED driver based on an Integrated Double Buck-Boost (IDBB) converter is presented. The converter is a two-stage cascade Buck-Boost topology featuring a single main switch and positive voltage output. The first stage is connected to the grid and it is operated in discontinuous conduction mode (DCM); working in this way a high power factor is naturally achieved. The second stage is used to improve the dynamic performance of the LED current and works in continuous conduction mode (CCM), which allows a low output current ripple in a 69W LED lamp. As an integrated converter, the power losses of the two stages are concentrated in the single transistor, when it is in hard switching. The proposed soft switching technique consists on a lossless voltage active snubber and a current passive snubber, which allows that the converter switches at zero voltage at the turn off, and in zero current at during the turn on. A comparison between hard switching and soft switching techniques is made based on a PSim simulation.

Keywords: Buck-boost, current, snubber, switch, voltage.

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Referencias


C. Gobbato, S. V. Kohler, I. H. de Souza, G. W. Denardin, J. de Pelegrini Lopes, Integrated topology of DC converter for street lighting system based on LED modular drivers, 2016 12th IEEE International Conference on Industry Applications (INDUSCON), Curitiba, pp. 1-6, 2016.

Ching-Jung Tseng, Chern-Lin Chen. A passive lossless snubber cell for nonisolated PWM DC/DC converters, IEEE Transactions on Industrial Electronics, vol. 45, no. 4, pp. 593-601, 1998.

Enhui Chu, Weiyu Hu, Jinxing Gong, Rui Hou, Mutsuo Nakaoka, A novel high frequency ZVS-PWM boost DC-DC converter with auxiliary resonant snubber, 2010 International Conference on Communications, Circuits and Systems (ICCCAS), Chengdu, pp. 576-580, 2010.

H. C. Kim, M. C. Choi, S. Kim, D. K. Jeong., An AC–DC LED Driver With a Two-Parallel Inverted Buck Topology for Reducing the Light Flicker in Lighting Applications to Low-Risk Levels, IEEE Transactions on Power Electronics, vol. 32, no. 5, pp. 3879-3891, 2017.

H. J. Choe, Y. C. Chung, C. H. Sung, J. J. Yun, B. Kang, Passive Snubber for Reducing Switching-Power Losses of an IGBT in a DC–DC Boost Converter, IEEE Transactions on Power Electronics, vol. 29, no. 12, pp. 6332-6341, 2014.

J. M. Alonso, J. Vina, D. G., Vaquero, G. Martinez, R. Osorio. Analysis and Design of the Integrated Double Buck–Boost Converter as a High-Power-Factor Driver for Power-LED Lamps. IEEE Transactions on Industrial Electronics, vol. 59, no. 4, pp. 1689-1697, 2012.

J. Marshall, M. Kazerani, A Novel Lossless Snubber for Boost Converters, 2006 IEEE International Symposium on Industrial Electronics, Montreal, Que., pp. 1030-1035, 2006.

Kaiwei Yao, F. C. Lee, Yu Meng, Jia Wei, Tapped-inductor buck converters with a lossless clamp circuit, APEC. Seventeenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.02CH37335), Dallas, TX, pp. 693-698, 2002.

K. Fujiwara, H. Nomura, A novel lossless passive snubber for soft-switching boost-type converters, in IEEE Transactions on Power Electronics, vol. 14, no. 6, Noviembre 1999, pp. 1065-1069.

K. Zhou, J. G. Zhang, S. Yuvarajan, D. F. Weng. Quasi-Active Power Factor Correction Circuit for HB LED Driver. IEEE Transactions on Power Electronics, vol. 23, no. 3, pp. 1410-1415, 2008.

M. Mohammadi, E. Adib, M. R. Yazdani, Family of Soft-Switching Single-Switch PWM Converters With Lossless Passive Snubber, IEEE Transactions on Industrial Electronics, vol. 62, no. 6, pp. 3473-3481, 2015.

Y. Zhao, W. Li, Y. Deng, X. He., High step-up boost converter with passive lossless clamp circuit for non-isolated high step-up applications, IET Power Electronics, vol. 4, no. 8, pp. 851-859, 2011.

Yoshihiro Konishi, Yung-Fu Huang, Soft-switching buck boost converter using passive snubber composed of pulse current regenerative resonant circuit, INTELEC 07 - 29th International Telecommunications Energy Conference, Roma, pp. 886-890, 2007.

Zhang Bo, Yang Xu, Xu Ming, Chen Qiaoliang, Wang Zhaoan. Design of Boost-Flyback Single-Stage PFC converter for LED power supply without electrolytic capacitor for energy-storage. 2009 IEEE 6th International Power Electronics and Motion Control Conference, Wuhan, pp. 1668-1671, 2009.


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