Modelling and Control of an Optimized Cascade Structure for LED Street Lighting Fixtures

被引：0
作者：
Camponogara, D. [1 ]
Vargas, D. R. [1 ]
Campos, A. [1 ]
Dalla Costa, M. A. [1 ]
Garcia, J. [2 ]
Alonso, J. M. [2 ]
机构：
[1] Univ Fed Santa Maria, Av Roraima 1000, BR-97105900 Santa Maria, RS, Brazil
[2] Univ Oviedo, E-33024 Oviedo, Spain
来源：
38TH ANNUAL CONFERENCE ON IEEE INDUSTRIAL ELECTRONICS SOCIETY (IECON 2012) | 2012年
关键词：
LED lamps; Digital Control; Switched-mode power supply; Energy storage; Energy efficiency; AC-DC power converters;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This paper presents a converter structure applied to supply high power Light Emitting Diodes (LEDs) from the mains in a street lighting system, based on the Reduced Redundant Power Processing (R-2 P-2) principle. It is used a Buck-Boost operating in Discontinuous Conduction Mode (DCM) as Power Factor Corrector (PFC) to guarantee high power factor and low current harmonic injection to the mains. The second converter of the structure works only to control the current through the LED array. Because LED have a voltage source behaviour, only part of the rated power needs to be processed twice to regulate the output current. The system modelling and control structure are shown in detail. A laboratory prototype, with a rated power of 75W for a rated input voltage of 220V(rms), was built to show the feasibility of the idea.
引用
收藏
页码：4575 / 4580
页数：6
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