Fixed frequency self-oscillating electronic ballast to supply multiple lamps

• Published in: 2004 IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551) Vol. 1; pp. 413 - 418 Vol.1
• Main Authors: Campos, A., Costa, M.A.D., Pinto, R.A., Prado, R.N.
• Format: Conference Proceeding
• Language: English
• Published: Piscataway NJ IEEE 2004
• Subjects: Applied sciences; Circuit properties; Diodes; Electric, optical and optoelectronic circuits; Electrical engineering. Electrical power engineering; Electronic ballasts; Electronic circuits; Electronics; Exact sciences and technology; Filters; Fluorescent lamps; IEC standards; Miscellaneous; Power electronics, power supplies; Power factor correction; Reactive power; Switches; Switching frequency; Switching, multiplexing, switched capacity circuits; Transformers and inductors; Various equipment and components; Voltage; Class C; Prototype; Lighting fitting; Fluorescent lamp; Power factor correction; Driver; Experimental study; Switching; Ballast electricity; High power; Switching conditions; IEC standard; Power factor regulation; Selfoscillation; Selector switch; Power factor; Inward current
• ISBN: 9780780383999; 0780383990
• ISSN: 0275-9306; 2377-6617
• DOI: 10.1109/PESC.2004.1355781

This paper describes a self-oscillating electronic ballast, having fixed switching frequency, to supply four independent fluorescent lamps, with high power factor. To provide the power factor correction it was studied the modifications of the valley-fill filter, presented in the literature, choosing one that meets the IEC 61000-3-2 Class C requirements of the input current distortion. To drive the switches it was proposed a modification in the conventional self-oscillating driver, new in the literature, making it independent on the load of the ballast. So, it is built up the prototype and showed the experimental results.