High Frequency PWM Dimming Technique for High Power Factor Converters in LED Lighting

被引：23

作者：

Gacio, D. ^{[1
]}

Alonso, J. M. ^{[1
]}

Garcia, J. ^{[1
]}

Campa, L. ^{[1
]}

Crespo, M. ^{[1
]}

Rico-Secades, M. ^{[1
]}

机构：

[1] Univ Oviedo, Ind Elect & Lighting Grp, ES-33204 Gijon, Spain

来源：

2010 TWENTY-FIFTH ANNUAL IEEE APPLIED POWER ELECTRONICS CONFERENCE AND EXPOSITION (APEC) | 2010年

关键词：

D O I：

10.1109/APEC.2010.5433585

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper deals with the capability of dimming operation added to the Integrated Buck-Flyback Converter (IBFC) topology developed in previous works. Firstly, the three main dimming methods that have been identified by the authors such as enable dimming, shunt dimming and series dimming will be briefly commented. Afterwards, the IBFC topology will be tested performing enable dimming at 100 Hz and 200 Hz. Secondly, besides the main dimming methods, a new proposal is introduced: high frequency series PWM dimming, which overcomes the main issues faced when developing series PWM dimming in constant-current fixed-frequency controlled converters. The dimming control loop of this technique will be presented, as well as the laboratory tests performed, obtaining good results in terms of dimming ratio, harmonic content of the input current and power factor.

引用

页码：743 / 749

页数：7

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