Title :
The characteristics of new piezoelectric ballast for fluorescent T8 lamp
Author :
Lee, J.S. ; Lee, Y.H. ; Chai, H.I. ; Yoon, M.S. ; Lim, K.J.
Author_Institution :
Dept. of Electr. Eng., Chung-Buk Nat. Univ., Cheongju, South Korea
Abstract :
The characteristics of a novel piezoelectric ballast for fluorescent T8 lamp are investigated in this study. A piezoelectric transformer is used in new piezoelectric ballast in place of a conventional ignition inductor. A piezoelectric transformer is circular in form, which is poled to thickness direction and is vibrated to radial direction. The step-up ratio, temperature rise, and efficiency of the piezoelectric transformer fabricated are about 1.2, 10°C, and 97%, respectively. The ballast using the piezoelectric transformer is a type of series resonant half bridge inverter. To resonate with piezoelectric transformer and to preheat the lamp, a 2 mH inductor and 2.2 nF preheating capacitor are used. As the results, output power and power factor of new piezoelectric ballast are about 30 W and 0.99
Keywords :
bridge circuits; capacitors; fluorescent lamps; inductors; invertors; lamp accessories; piezoelectric devices; transformers; 30 W; 97 percent; efficiency; fluorescent T8 lamp; ignition inductor; inductor; lamp preheating; piezoelectric ballast; piezoelectric transformer; preheating capacitor; radial direction vibration; series resonant half bridge inverter; step-up ratio; temperature rise; Bridges; Capacitors; Electronic ballasts; Fluorescence; Ignition; Inductors; Inverters; Power generation; Resonance; Temperature;
Conference_Titel :
Industrial Electronics, 2001. Proceedings. ISIE 2001. IEEE International Symposium on
Conference_Location :
Pusan
Print_ISBN :
0-7803-7090-2
DOI :
10.1109/ISIE.2001.931600
