A study on LED retrofit solutions for low-voltage halogen cycle lamps

Author

Alonso, J. Marcos ; Gacio, David ; Calleja, Antonio J. ; Ribas, Javier ; López, Emilio

Author_Institution

Electr. & Electron. Eng. Dept., Univ. de Oviedo, Gijon, Spain

fYear

2011

fDate

9-13 Oct. 2011

Firstpage

1

Lastpage

8

Abstract

In this paper a study on LED retrofit solutions for low-voltage halogen cycle lamps is conducted. In the first place, a lamp based on a LED array is designed to operate in substitution of a 50 W halogen lamp. The design includes the selection of an adequate LED array in terms of lumen output and color temperature and the calculation of the necessary heatsink to assure the correct operation of the LED lamp within the whole temperature range. In a second part of the paper, a passive converter based on a bridge rectifier and a limiting resistance is studied and tested at the laboratory. Next, an active solution based on a buck-boost converter operating in discontinuous conduction mode is designed and experimentally evaluated. Finally, a comparison in terms of input power factor, input current harmonic content, LED current ripple, LED current regulation, efficiency and photometric characteristics is carried out.

Keywords

LED lamps; electric current control; heat sinks; low-power electronics; maintenance engineering; power convertors; power factor; LED array; LED current regulation; LED current ripple; LED retrofit solution; bridge rectifier; buck-boost converter; color temperature; discontinuous conduction mode; heat sink; input current harmonic content; input power factor; low-voltage halogen cycle lamp; passive converter; photometric characteristics; power 50 W; temperature range; Current measurement; Light emitting diodes;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Society Annual Meeting (IAS), 2011 IEEE

Conference_Location

Orlando, FL

ISSN

0197-2618

Print_ISBN

978-1-4244-9498-9

Type

conf

DOI

10.1109/IAS.2011.6074367

Filename

6074367