High‐power‐factor light‐emitting diode lamp power supply without electrolytic capacitors for high‐pressure‐sodium lamp retrofit applications. Issue 8 (1st September 2013)

• Record Type: Journal Article
• Authors: Alonso, J. Marcos; Calleja, Antonio J.; Gacio, David; Cardesín, Jesus; Lopez, Emilio; Dalla Costa, Marco Antonio; da Silva, Marcelo Freitas; do Prado, Ricardo Nederson
• Is Part Of: IET power electronics. Volume 6:Issue 8(2013)
• Page Start: 1502
• Page End: 1515
• Publication Date: 2013-09-01
• Subjects: LED lamps -- maintenance engineering -- power capacitors -- power convertors -- power factor -- power supplies to apparatus; high‐power‐factor light‐emitting diode lamp power supply -- electrolytic capacitor -- high‐pressure‐sodium lamp retrofitting application -- long‐life high‐power‐factor integrated converter -- buck‐boost converter -- voltage transformation ratio -- low‐voltage LED lamp array -- long‐life film capacitor -- voltage 230 V -- frequency 50 Hz -- power 100 W; Power electronics -- Periodicals; 621.31705
• DOI: 10.1049/iet-pel.2012.0142
• Languages: English
• ISSNs: 1755-4535

Abstract

Abstract : A long‐life high‐power‐factor integrated converter able to supply light‐emitting diode (LED) lamps in high‐pressure‐sodium lamp retrofitting applications is presented. The proposed converter is the integration of a buck‐boost converter with a buck converter, thus providing the necessary high input power factor and voltage transformation ratio to supply the low‐voltage LED array from the mains. The analysis of the converter is carried out, and a design procedure is proposed. The design is also performed so that low capacitances are needed at the output of each semi‐stage. This allows for the use of long‐life film capacitors, thus matching the converter lifetime to that of the LED lamp. A laboratory prototype supplied from 230 Vrms /50 Hz mains used to drive two LED arrays in series with a total output power of 100 W is presented.