Title :
Operating characteristics of small-wattage metal halide lamps with square wave current from 50 Hz to 50 kHz
Author :
Lee, Ching R. ; Chen, Kuan H. ; Moo, Chin S.
Author_Institution :
Dept. of Electr. Eng., Fortune Institue of Technol., Kaohsiung, Taiwan
Abstract :
The operating characteristics of small-wattage metal halide lamps (35 W, 70 W, and 150 W) are investigated. A test system with a laboratory electronic ballast is built to operate metal halide lamps with square-wave currents in a frequency range from 50 Hz up to 50 kHz. Experimental. results show that the luminous efficiency decreases slightly as the operating frequency increases but deteriorates considerably for dimming operation. By examining the acoustic resonance, it is found that the lamp arc instability is strongly related to the dead-time of the inverter. The investigated results provide useful information in the design of the electronic ballasts for metal halide lamps.
Keywords :
acoustic resonance; halides; invertors; lamp accessories; metal vapour lamps; 150 W; 35 W; 50 Hz to 50 kHz; 70 W; acoustic resonance; dimming operation; electronic ballast; inverter dead-time; lamp arc instability; luminous efficiency; metal halide lamps; operating characteristics; operating frequency; small-wattage metal halide lamps; square wave current; square-wave currents; test system; Buck converters; Circuit testing; Electronic ballasts; Electronic equipment testing; Frequency; Inverters; Laboratories; Lamps; Resonance; System testing;
Conference_Titel :
Industry Applications Conference, 2003. 38th IAS Annual Meeting. Conference Record of the
Print_ISBN :
0-7803-7883-0
DOI :
10.1109/IAS.2003.1257669
