High-Efficiency Asymmetrical Half-Bridge Converter Without Electrolytic Capacitor For Low-Output-Voltage Ac–Dc Led Driver For Street Lighting

International Journal of Electrical and Electronics Engineering
© 2014 by SSRG - IJEEE Journal
Volume 1 Issue 5
Year of Publication : 2014
Authors : Manish.G.Rathi, Avinash.J.Dudgi
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Citation:
MLA Style:

Manish.G.Rathi, Avinash.J.Dudgi, "High-Efficiency Asymmetrical Half-Bridge Converter Without Electrolytic Capacitor For Low-Output-Voltage Ac–Dc Led Driver For Street Lighting" SSRG International Journal of Electrical and Electronics Engineering 1.5 (2014): 13-19.

APA Style:

Manish.G.Rathi, Avinash.J.Dudgi,(2014). High-Efficiency Asymmetrical Half-Bridge Converter Without Electrolytic Capacitor For Low-Output-Voltage Ac–Dc Led Driver For Street Lighting. SSRG International Journal of Electrical and Electronics Engineering 1.(5), 13-19.

Abstract:

 There is a trend to shift the lighting source towards light-emitting diode due to the outstanding performance and efficiency, the best example is High-brightness light-emitting diodes (LEDs). To utilize their features, large number of solutions for supplying LED strings are coming out. One-stage solutions are cost effective, but compared to two-stage and three-stage solutions their efficiency is low because they have to serve many tasks like; power factor correction (PFC), galvanic isolation and current regulation, so switching stress will be more and hence the losses. Two-stage and three-stage solutions are preferred option when supplying several strings at a time. Even though two-stage and three-stage solutions have higher cost, they are efficient because each stage is optimized for one task only, and reliability can be obtained by eliminating the use of electrolytic capacitor in them. In this paper, a three-stage solution for street lighting application is proposed, in which power factor correction is achieved by boost converter, while the galvanic isolation by electronic transformer (second stage), and current regulation by two-input buck converter (TIBuck) in the third stage. DSPIC30F4011 microcontroller is used to provide switching frequency for the switches used in the converter. Experimental results obtained with a 40- W prototype show efficiency as high as 93% for the whole topology stages.

References:

[1] A.Zukauskas, Introduction to solid-state lighting, (wiley 2002).
[2] E. F. Schubert, Light-emitting diodes, (Cambridge University Press, 2006).
[3] ON Semiconductor, LED lighting solutions, Feb. 2010, pp. 1-36.
[4] S.Y.R. Hui, S. N. Li, X. H. Tao, W. Chen and W. M. Ng, A Novel passive off-line light-emitting-diode (LED) driver with long life time, in proc. Of IEEE APEC’10, pp. 594-600, 2010.
[5] Linlin Gu, Xinbo Ruan, Ming Xu, Kai Yao, Means of eliminating electrolytic capacitor in ac-dc power supplies for LED lightings, IEEE transaction on power electronics. Vol. 24, no. 5, pp. 1399-1408, May 2009.
[6] Liu Yu, Yang Jinming, The topologies of white LED lamps power drivers, IEE engineering science and education journal, vol.9, Oct. 2009, pp 207-217.
[7] Manuel Arias, Diego G. Lamar, Javier Sebastián, Didier Balocco, and Almadidi Aguissa Diallo, High-Efficiency LED Driver Without Electrolytic Capacitor for Street Lighting, IEEE TRANS. Ind. Vol. 49, no. 1, pp. 127-137, Jan/Feb. 2013.
[8] Ned mohan, Tore M. undeland, William P. Robbins, Power electronics converters, applications, and design, (wiley india (P.) Ltd, third edition, 2008) 172-178.
[9] Javier Sebastian, Pedro J. Villegas, Fernando Nuno, Marta M. Hernando, High-efficiency and wide-bandwidth performance obtainable from a Two-Input Buck converter, IEEE transaction on Power electronics. Vol. 13, no. 4, pp. 706-717, July. 1998.

Key Words:

  AC-DC power converters, electronic transformer, high efficiency, light-emitting diode (LED) lighting, three-stage topology, two-input buck.