DocumentCode :
3412625
Title :
A study on the T5 fluorescent lamp ballast used contour vibration mode piezoelectric transformer using a one-chip microcontroller
Author :
Hwang, L.H. ; Yoo, J.H. ; Kim, J.R. ; Jang, E.S. ; Lee, C.S. ; Cho, M.T. ; Kim, J.S.
Author_Institution :
Dept. of Electr. Eng., Semyung Univ., Chungbuk, South Korea
fYear :
2002
fDate :
28 May-1 June 2002
Firstpage :
287
Lastpage :
290
Abstract :
The traditional magnetic ballasts operated at 50-60Hz have been suffered from noticeable flicker, high loss, large crest factor and heavy weight. In this study, in order to solve the problems, new type of electronic ballast which composed of rectifier, active power factor corrector, series-resonant half bridge inverter, feed back circuit for maintaining constantly current to lamp, protection circuit out of order ballast circuit or piezoelectric transformer and end of lamps life, dimming control, piezoelectric transformer for driving T5 fluorescent lamp were manufactured and using a one chip microcontroller. These ballast circuits could replace magnetic transformer and resonant capacitor with piezoelectric transformers. The proposed electronic ballast operated at high frequency (about 75kHz) showed input power factor of more than 0.995, total harmonic distortion of less than 12% and lamp current crest factor of less than 1.5, respectively. And also, output power and efficiency shown 28W and 85%, respectively. Accordingly, it is considered that the ballast using piezoelectric transformer can replace the typical electronic ballast.
Keywords :
driver circuits; fluorescent lamps; frequency control; lamp accessories; microcontrollers; piezoelectric devices; power factor; transformers; active power factor corrector; contour vibration mode transformer; drive circuits; electronic ballast; external-oscillating inverter; feedback circuit; fine driving frequency control; fluorescent lamp ballast; harmonic distortion; one chip microcontroller; piezoelectric transformer; series-resonant half bridge inverter; Bridge circuits; Electronic ballasts; Feeds; Fluorescent lamps; Inverters; Magnetic resonance; Microcontrollers; Protection; Reactive power; Rectifiers;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Applications of Ferroelectrics, 2002. ISAF 2002. Proceedings of the 13th IEEE International Symposium on
ISSN :
1099-4734
Print_ISBN :
0-7803-7414-2
Type :
conf
DOI :
10.1109/ISAF.2002.1195925
Filename :
1195925
Link To Document :
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