ELECTRONIC BALLAST POWER CONTROL WITH MAGNETICALLY CONTROLLED COIL

Abstract

Electronic ballasts have several advantages over magnetic ballasts such as providing higher efficacy, better illumination quality, longer lamp life and smaller size. In this study, magnetically controlled inductor controls the florescent lamp power by changing the ballast impedance and resonant frequency and the proposed topology is implemented on self-oscillating push pull electronic ballast. In the proposed ballast power control technique, zero voltage switching (ZVS) is accomplished. The topology is also simulated in order to compare the results. Both simulation and experimental results have good agreement.

Keywords

• Push pull inverter, Magnetically controlled coil, Electronic ballast, Dimming.

MANYETiK DENETiMLi BOBiN iLE ELEKTRONiK BALAST GÜÇ DENETiMi

Öz

Elektronik balastlar manyetik balastlara kıyasla, daha yüksek etkinlik faktörüne, daha iyi ısık kalitesine, daha uzun lamba ömrüne ve daha küçük hacme sahiptir. Bu çalısmada, lamba gücü, balast empedansını ve rezonans frekansını degistiren manyetik kontrollü bobin tarafından yapılmaktadır ve bu yöntem kendinden tetiklemeli akim beslemeli push pull tipi elektronik balastlarda gerçeklestirilmistir. Burada sunulan güç kontrolü yönteminde, sıfır voltaj anahtarlaması gerçeklestirilmistir. Elde edilen sonuçları karsılastırmak için, sunulan yöntemin aynı zamanda simulasyonuda yapılmıstır. Deneysel ve simulayon sonuçları uyum göstermektedir.

Anahtar Kelimeler

• Push pull evirici, Manyetik denetimli bobin, Elektronik balast, Isık denetimi.

Kaynakça

1. Alonso, J. M., Dalla-Costa, M. A. and Cardesin, J. 2005a. Magnetic Dimming of Electronic Ballasts. Electronics Letters. (41), 12.
2. Alonso, J. M., Dalla-Costa, M. A., Cardesin, J. and Rico-Secades, M. 2005b. A New Control Method for Electronic Ballasts Based on Magnetic Regulators. IEEE, IAS. 1958-1964.
3. Börekci, S. and Öncu, S. 2007. Dimming SelfOscillating Ballast by Variable Inductor. Electronics Letters. 43 (14), 772-774.
4. Chan, S. M. S., Chung, H. S. H. and Hui, S. Y. 2005. Design and Analysis of an IC-Less Self-Oscillating Series Resonant Inverter for Dimmable Electronic Ballasts. IEEE Transactions on Power Electronics. 20 (6), 1450-1458.
5. Gulko, M., Medini, D. and Ben-Yaakov, S. 1994. Inductor-Controlled Current-Sourcing Resonant Inverter and Its Application as a High Pressure Discharge Lamp Driver. IEEE. 434-440.
6. Kazimierczuk, M. K. and Caravens, R. C. 1996. Current-Source Parallel-Resonant DC/AC Inverter with Transformer, IEEE Transactions on Power Electronics. 11 (2), 275-284.
7. Kazimierczuk, M. K. ve Szaraniec, W. 1993. Electronic Ballast for Fluorescent Lamps. IEEE International Transactions on Power Electronics. 8 (4), 386-395.
8. Moo, S. C., Cheng, L. H., Lin, T. F. and Yen, H. C. 1999. Designing a Dimmable Electronic Ballast With Voltage Control for Fluorescent Lamp. IEEE. ISIE’1999. 786-791, Bled Slovenia.

9. Tao, F., Lee, C. F. and Onishi, N. 2001. Self Oscillating Electronic Ballast With Dimming Control. IEEE. 1818-1823.
10. Yu, T. H., Wu, L. M. and Wu, T. F. 1994. Comparisons Among Self-Excited Parallel Resonant, Series Resonant and Current-Fed PushPull Electronic Ballasts. IEEE. 421-426.
11. Wu, T.F., Tzeng, S.Y., Liu, Y.C. and Yu, T.H. 1998. Single-Stage, Current-Fed Push Pull Electronic Ballast with Power Factor Correction. IEEE. 20442051.