Title :
A “Class-A2” Ultra-Low-Loss Magnetic Ballast for T5 Fluorescent Lamps—A New Trend for Sustainable Lighting Technology
Author :
Hui, S.Y.R. ; Lin, D.Y. ; Ng, W.M. ; Yan, W.
Author_Institution :
Centre for Power Electron., City Univ. of Hong Kong, Kowloon, China
Abstract :
The high-voltage and low-current features of T5 lamps imply that the copper and core losses of the magnetic ballast can be greatly reduced. This paper shows that magnetic ballasts for high-voltage T5 lamps are not only feasible but their luminous and ballast-loss performance can be better than those of the electronic ballasts. Contrary to common belief, high frequency operation of T5 28 W lamps increases the luminous efficacy by an average of 3.6% only (less than 5%). Practical implementation of an ultra-low-loss magnetic ballast system for T5 28 W lamps is presented. Its total system power is less than the 32 W upper limit specified for Class A2 of energy-efficient electronic ballast for T5 28 W lamps. High-luminous efficacy of 75.63-77.66 lm/W can be achieved. This important breakthrough has the potential of reversing the existing trend of using electronic ballasts as the energy-saving technology in lighting industry. With a better luminous efficacy, lower product and maintenance costs, much longer lifetime, and the use of recyclable metallic materials over its electronic counterparts, this patent-pending proposal provides a truly sustainable lighting solution to the lighting industry.
Keywords :
fluorescent lamps; lamp accessories; lighting; T5 fluorescent lamps; class-A2 ultra-low-loss magnetic ballast; energy-efficient electronic ballast; energy-saving technology; lighting industry; luminous efficacy; patent-pending proposal; power 28 W; power 32 W; recyclable metallic materials; sustainable lighting technology; Ballasts; lighting; lighting control;
Journal_Title :
Power Electronics, IEEE Transactions on
DOI :
10.1109/TPEL.2010.2058128