Power Flow Analysis and Critical Design Issues of Retrofit Light-Emitting Diode (LED) Light Bulb

Author

Sinan Li ; Huanting Chen ; Siew-Chong Tan ; Hui, S. Y. Ron ; Waffenschmidt, Eberhard

Author_Institution

Dept. of Electr. & Electron. Eng., Univ. of Hong Kong, Hong Kong, China

Volume

30

Issue

7

fYear

2015

fDate

42186

Firstpage

3830

Lastpage

3840

Abstract

For retrofit applications, some high-brightness light-emitting diode (LED) products have the same form factor restrictions as existing incandescent light bulbs. Such form factor constraints may restrict the design and optimal performance of the LED technology. In this paper, some critical design issues for commercial LED bulbs designed for replacing E27 incandescent lamps are quantitatively analyzed. The analysis involves power audits on such densely packed LED systems so that the amounts of power consumption in: 1) the LED wafer; 2) the phosphor coating; and 3) the lamp translucent cover are quantified. The outcomes of such audits enable R&D engineers to identify the critical areas that need further improvements in a compact LED bulb design. The strong dependence of the luminous output of the compact LED bulb on ambient temperature is also highlighted.

Keywords

LED lamps; auditing; filament lamps; load flow; maintenance engineering; power consumption; E27 incandescent lamps; LED technology; LED wafer; ambient temperature; commercial LED bulbs; compact LED bulb design; form factor restrictions; high-brightness LED products; high-brightness light-emitting diode products; lamp translucent cover; luminous output; phosphor coating; power audits; power consumption; power flow analysis; Coatings; Electronic ballasts; Heating; Light emitting diodes; Lighting; Phosphors; Temperature; Energy audit; light-emitting diode; photo-electro-thermal theory;

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/TPEL.2014.2339191

Filename

6855361