Title :
A Study on the design and performance of electronic ballast for CCFL dimming control with frequency modulation
Author :
Kim, Cherl-Jin ; Ji, Jae-Geun ; Yoon, Shin-Yong
Author_Institution :
Dept. of Electr. Eng., Halla Univ., Kangwondo, South Korea
Abstract :
Commonly, CCFL dimming methods are used to either lamp current regulation or average current adjust feeding the CCFL inverter. And inverter operation frequency is higher than resonant frequency for safe operation. In this study, we design the half-bridge type series and parallel resonant converter circuit that switches at variable frequency modulation method to control the output power. This method has advantage such as low EMI and reduced harmonics, and it is convenient to dimming control with microprocessor. The validity of this study is confirmed from the simulation and experimental results.
Keywords :
electromagnetic interference; frequency modulation; lamp accessories; microcontrollers; power control; resonant invertors; resonant power convertors; CCFL dimming control; current adjust feeding; electronic ballast; frequency modulation; half-bridge type series; inverter operation frequency; lamp current regulation; parallel resonant converter circuit; variable frequency modulation; Current control; Electronic ballasts; Frequency modulation; Inverters; Lamps; RLC circuits; Resonance; Resonant frequency; Switching circuits; Switching converters;
Conference_Titel :
Electrical Machines and Systems, 2003. ICEMS 2003. Sixth International Conference on
Conference_Location :
Beijing, China
Print_ISBN :
7-5062-6210-X
