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A Study on T5 28W Fluorescent Lamp Ballast Using a Piezoelectric Transformer and One-chip Microcontroller  

황락훈 (세명대학교 전기공학과)
류주현 (세명대학교 전기공학과)
장은성 (세명대학교 전기공학과)
조문택 (대원과학대학 전기과)
안익수 (대원과학대학 인터넷 전자상거래과)
홍재일 (동서울대 전기정보제어과)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.8, no.1, 2003 , pp. 70-79 More about this Journal
Abstract
In this paper, T5 28-watt fluorescent lamp ballast using a piezoelectric transformer is fabricated and its characteristic is investigated. Developed electronic ballast is composed of basic circuits and blocks, such as rectifier part, active power factor corrector part, frequency oscillation part using microcontroller and feedback control, piezoelectric transformer and resonant half bridge inverters. The fabricated ballast uses to variable frequency methode in external so exciting that the frequency of piezoelectric transformer could be generated by voltage control oscillator using microcontroller(AT90S4433). The current of fluorescent lamp is detected by feedback control circuit. The signal of inverter output is received using Piezoelectric transformer, and then its output transmitted to fluorescent lamp. Traditional electromagnetic ballasts operated at 50-60Hz have been suffered from noticeable flicker, high loss, large crest factor and heavy weight. A new electronic ballast is operated at high frequency about 75kHz, and then Input power factor, distortion of total harmonic and lamp current crest factor are measured about 0.9!35, 12H and 1.5, respectively Accordingly, the traditional ballast is by fabricated electronic ballast using piezoelectric transformer and voltage control oscillator because of its lighter weight, high efficiency, economic merit and saving energy.
Keywords
Fluorescent Lamp; CF(Crest Factor); PT(Piezoelectric Transformer); Ballast; VCO; UART; SPI;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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