Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/14498
Title: General n-level driving approach for improving electrical-to-optical energy-conversion efficiency of fast-response saturable lighting devices
Authors: Tan, SC
Keywords: Direct supply
Energy-conversion efficiency
Lighting device
Lighting system
N-level driving approach
Pulsewidth modulation (PWM)
Issue Date: 2010
Publisher: Institute of Electrical and Electronics Engineers
Source: IEEE transactions on industrial electronics, 2010, v. 57, no. 4, 5208373, p. 1342-1353 How to cite?
Journal: IEEE transactions on industrial electronics 
Abstract: Power-electronics interface and the technique of pulsewidth modulation have been the heart of controlling the illumination intensity of lighting devices. It is, however, observed that for some lighting devices, the use of such a methodology leads to a lower energy-conversion efficiency (with a lower light intensity for the same amount of electrical input power) than potentially possible. The main problem is related to the saturable characteristic of the electrical-to-optical energy conversion, which follows that of an exponential characteristic, and the fast nature of this reaction in these lighting devices. This paper presents an in-depth discussion on the phenomenon and offers a solution to the problem. Specifically, it is proposed that an n -level type of driving approach to be adopted in the design and construction of power-electronic drivers for fast-response saturable lighting devices to achieve a quasi-optimal lighting efficacy. The result is energy saving for the same required light illumination. Theoretical proofs and experimental results are provided for verification. The topic of discussion in this paper and the proposed approach are not only applicable to the area of electronic circuits and lighting devices, but also to general controlled systems which comprise components that inherit a saturable and fast-reactive energy conversion characteristic.
URI: http://hdl.handle.net/10397/14498
ISSN: 0278-0046
EISSN: 1557-9948
DOI: 10.1109/TIE.2009.2029515
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

53
Last Week
0
Last month
0
Citations as of Aug 21, 2017

WEB OF SCIENCETM
Citations

47
Last Week
1
Last month
0
Citations as of Aug 20, 2017

Page view(s)

31
Last Week
0
Last month
Checked on Aug 20, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.