PV power system using buck/forward hybrid converters for LED lighting

S. Y. Fan*, S. Y. Tseng, Y. J. Wu, J. D. Lee

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

10 Scopus citations

Abstract

This paper presents an LED lighting system with a PV source. The circuit structure of the proposed system adopts buck converter combined with forward converter. In this research, buck converter is used as a charger for charging battery, and forward converter with active clamp circuit, which can recover leakage inductor energy and reset magnetizing energy stored in the transformer, is adopted to drive LED lighting. To simplify the circuit structure, switches of two converters are integrated with a synchronous switch technique. With this approach, the proposed system has several merits, which are a less component counts, lighter weight, smaller size and higher conversion efficiency. Compared with the conventional converter with hard-switching circuit, the proposed one can improve conversion efficiency of 5% and achieve efficiency about 82% under full load when the proposed system is operated in the driving LED condition. Experimental results obtained from a prototype with the output voltage of 10V and output power of 20W have been implemented to verify verified its feasibility. Keywords: LED lighting system, buck converter, forward converter, active clamp circuit, synchronous switch technique.

Original languageEnglish
Title of host publication2009 IEEE Energy Conversion Congress and Exposition, ECCE 2009
Pages2584-2591
Number of pages8
DOIs
StatePublished - 2009
Event2009 IEEE Energy Conversion Congress and Exposition, ECCE 2009 - San Jose, CA, United States
Duration: 20 09 200924 09 2009

Publication series

Name2009 IEEE Energy Conversion Congress and Exposition, ECCE 2009

Conference

Conference2009 IEEE Energy Conversion Congress and Exposition, ECCE 2009
Country/TerritoryUnited States
CitySan Jose, CA
Period20/09/0924/09/09

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