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HF Multiresonant Electronic Ballast for Fluorescent Lamps With Constant Filament Preheat Voltage

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3 Author(s)
Ben-Yaakov, S. ; Dept. of Electr. & Comput. Eng., Ben-Gurion Univ. of the Negev, Beer-Sheva ; Shvartsas, M. ; Ivensky, G.

A novel HF multiresonant ballast for fluorescent lamps is analyzed, simulated, and tested experimentally. The ballast includes two major resonant networks. The lamp is driven by a parallel resonance arrangement that acts as a current source. During warm-up the filaments are driven by a secondary winding of a series-resonant inductor. The series resonance branch, which is active during warm-up, feeds the filament and shorts out the voltage across the lamp. Simulation and experimental results suggest that the inherent features of the proposed ballast topology will prolong lamp life.

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Industry Applications, IEEE Transactions on  (Volume:44 ,  Issue: 1 )