La limitation de la tension permet des économies multiples :
- Reduced active power without compromising user comfort.
- Increase in the service life of the light source.
- Increase in the service life of the ballast.
- Less heat loss (improved air-conditioning).
- Improved cos phi and therefore reduced reactive power compensator capacity.
- Furthermore, the environmental impact should not be ignored.
|
The originality of the LEC lies mainly in its design.
Although it does not use capacitors or power semi-conductors, its reliability is not limited by its few sensitive components.
Efficiency
The efficiency of the LEC, which is estimated at 97%, is excellent, to the extent that its measurement is highly dependent on the accuracy of the power analyzers used.
Comfort
A reduction in the electrical output of a light source results in a decrease in the illumination level.
|
This phenomenon was carefully observed during the tests. A sudden variation in voltage is clearly seen. On the other hand, a slow variation, even in steps of 2 V to 5 V, is not visible under normal working conditions.
Vaud School of Engineering
Yverdon-les-Bains, 7 July 2004
Fred Perrenoud, Ing.-Phys. EPFL, Dr ès Sciences (PhD), Scientific Associate,
Professor MARC Correvon, Ing. Dipl. (graduate engineer of the EPFL), Professor
Download full reports (French only):
1&2 Laboratoire (902 Ko)
3&4 tl installation (560 Ko)
|
