Title :
A new heating concept for fluorescent lamp ballasts
Author_Institution :
Tridonic, Dornbirn, Austria
Abstract :
A filament-heating concept for dimmable and nondimmable electronic ballasts has been developed. The filaments are supplied by an additional heating transformer, which is connected to the half bridge and controlled by a bi-directional transistor-set. This makes it easy to save energy by cutting off the heating-current in the normal operation mode for nondimmable ballasts. It is possible to adjust the value of the filament voltage with the duty-cycle of the heating transistor-set. This feature is useful for “multi-lamp-ballasts” which supply lamps with different electrical characteristics
Keywords :
electric heating; energy conservation; fluorescent lamps; lamp accessories; power transformers; power transistors; bi-directional transistor-set; dimmable electronic ballasts; electrical characteristics; energy savings; filament voltage; filament-heating concept; fluorescent lamp ballasts; half bridge; heating concept; heating transformer; heating transistor-set duty-cycle; multi-lamp-ballasts; nondimmable electronic ballasts; Bridge circuits; Electrical resistance measurement; Electronic ballasts; Fluorescent lamps; Heating; RLC circuits; Resonant frequency; Switches; Temperature; Voltage;
Conference_Titel :
Industry Applications Conference, 2000. Conference Record of the 2000 IEEE
Conference_Location :
Rome
Print_ISBN :
0-7803-6401-5
DOI :
10.1109/IAS.2000.882659
