Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)
- 1999.07f
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- Pages.2795-2797
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- 1999
Improved Passive Power Factor Correction Circuits of Electronic Ballasts for fluorescent lamps
형광등용 전자식 안정기에 적합한 수동 역률개선회로의 제안 및 특성 개선에 관한 연구
- Chae, Gyun (Department of Electrical Engineering Korea Advanced Institute of Science and Technology(KAIST)) ;
- Ryoo, Tae-Ha (Department of Electrical Engineering Korea Advanced Institute of Science and Technology(KAIST)) ;
- Cho, Gyu-Hyeong (Department of Electrical Engineering Korea Advanced Institute of Science and Technology(KAIST))
- Published : 1999.07.19
Abstract
Several power factor correction(PFC) circuits are presented to achieve high PF electronic ballast for both voltage-fed and current-fed electronic ballast. The proposed PFC circuits use valley-fill(VF) type DC-link stages modified from the conventional VF circuit to adopt the charge pumping method for PFC operations during the valley intervals. In voltage-fed ballast, charge pump capacitors are connected with the resonant capacitors. In current-fed type, the charge pump capacitors are connected with the additional secondary-side of the power transformer. The measured PF and THD are higher than 0.99 and 15% for all proposed PFC circuits. The lamp current CF is also acceptable in the proposed circuits. The proposed circuit is suitable for implementing cost-effective electronic ballast.
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