Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)
- 1997.07f
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- Pages.2002-2006
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- 1997
A Unity Power Factor Electronic Ballast for Fluorescent Lamp having Improved Valley Fill and Valley Boost Converter
개선된 밸리필과 밸리용 승압형 변환기를 결합한 고역률 형광등용 전자식 안정기
- Youn, Yong-Sik (Dept. of Electrical Engineering, KAIST) ;
- Chae, Gyun (Dept. of Electrical Engineering, KAIST) ;
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Cho, Gyun-Hyeong
(Dept. of Electrical Engineering, KAIST)
- Published : 1997.07.21
Abstract
A new PF correction topology, Improved Valley Fill (IVF) with Valley Boost Converter (VBC) used in the electronic ballast for fluorescent lamp is presented. The IVF can adjust the valley voltage higher than half the peak line voltage. Hence, there is no pulsating line current around the line voltage peak, PF and THD are significantly improved. The VBC is added to the IVF to achieve unity PF and to increase the valley voltage. The measured PF and THD for a prototype electronic ballast are 0.997 and 5%, respectively, and the lamp current CF is as low as 1.5
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