Title :
Harmonized strategy for breaking the acoustic resonance in the fluorescent lamp
Author :
Hsieh, Guan-Chyun ; Lin, Chang-Hua ; Yu, Ben-Jong
Author_Institution :
Dept. of Electron. Eng., Nat. Taiwan Inst. of Technol., Taipei, Taiwan
Abstract :
A harmonized strategy for breaking the acoustic resonance in fluorescent lamps under low-level dimming is proposed. A proposed harmonized circuit (HC) is installed in parallel with the lamp as a current-dependent source for modulating the lamp current. The lamp current before harmonizing is almost monotonic, but is harmonized and spread by the HC. Due to the energy spread, the acoustic resonance disappears and no helical form occurs in the lamp at low-level dimming. A harmonized model is established for analyzing the lamp performance. The harmonized approach is also built for disturbing the acoustic resonance. An experimental example is examined to assess the validity of the presented HC. The time and frequency responses of the lamp current with and without HC are clearly displayed for comparison
Keywords :
acoustic resonance; control system analysis; fluorescent lamps; frequency response; lighting control; modulation; acoustic resonance suppression; current-dependent source; energy spread; fluorescent lamp; frequency response; harmonized circuit; harmonized strategy; lamp current modulation; lamp performance analysis; low-level dimming; time response; Acoustical engineering; Circuits; Electronic ballasts; Fluorescent lamps; Frequency modulation; High intensity discharge lamps; Performance analysis; Power quality; Pulse width modulation; Resonance;
Conference_Titel :
Power Electronics Specialists Conference, 1998. PESC 98 Record. 29th Annual IEEE
Conference_Location :
Fukuoka
Print_ISBN :
0-7803-4489-8
DOI :
10.1109/PESC.1998.703461
