Dynamic control of a light-emitting diode system based on the general photo-electro-thermal theory

Author

Qin, Y.X. ; Lin, D.Y. ; Chung, H.S.H. ; Yan, W. ; Hui, S.Y.R.

Author_Institution

Centre for Power Electron., City Univ. of Hong Kong, Hong Kong, China

fYear

2009

fDate

20-24 Sept. 2009

Firstpage

2815

Lastpage

2820

Abstract

This paper presents a dynamic thermal model of a LED system and a control strategy for optimal power point tracking (OPPT). The control strategy is based on the general theory which links the photometric, electric and thermal behaviors of LEDs together. The control implementation enables the optimal operating of the LED systems to be determined dynamically. By measuring the ambient temperature and the heatsink temperature of LED system, the proposed control scheme allows the LED system to operate at the optimal dynamic operating points at which maximum luminous flux is generated. Practical tests have been carried out to verify the model and the general theory.

Keywords

light emitting diodes; optimal control; position control; power control; ambient temperature; dynamic control; general photo-electro-thermal theory; heatsink temperature; light-emitting diode system; optimal dynamic operating points; optimal power point tracking control strategy; General Photo-Electro-Thermal Theory; Optimal Power Point Tracking (OPPT); dynamic modeling; lighting emitting diodes;

fLanguage

English

Publisher

ieee

Conference_Titel

Energy Conversion Congress and Exposition, 2009. ECCE 2009. IEEE

Conference_Location

San Jose, CA

Print_ISBN

978-1-4244-2893-9

Electronic_ISBN

978-1-4244-2893-9

Type

conf

DOI

10.1109/ECCE.2009.5316481

Filename

5316481