1. A “Class-A2” Ultra-Low-Loss Magnetic Ballast for T5 Fluorescent Lamps—A New Trend for Sustainable Lighting Technology.
- Author
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Hui, S. Y. (Ron), Lin, D. Y., Ng, W. M., and Yan, Wei
- Subjects
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BALLASTS (Electricity) , *ENERGY conservation , *LAMPS , *LIGHTING , *MAINTENANCE costs , *RECYCLABLE material , *MAGNETIC resonance , *ELECTRIC inductors - 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. [ABSTRACT FROM PUBLISHER]
- Published
- 2011
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