Title :
Program start fluorescent ballast with clamped-Q resonant filament heating circuit
Author :
Wei Xiong ; Stankovic, Ana V.
Author_Institution :
Product Dev., Universal Lighting Technol., Madison, AL, USA
Abstract :
In this paper, a program-start fluorescent ballast is proposed. The proposed program start ballast has a resonant filament heating circuit with clamped Q. The proposed resonant filament heating circuit gives the ballast strong filament preheat capability, desensitizes the preheat voltage variation within a reasonable range of preheat frequency and cuts the filament heating back in full bright. Moreover, the proposed circuit makes the filament heating voltage insensitive to component value changes. The proposed low cost program-start fluorescent ballast improves the system efficacy and effectively solves the large pin current problem. Mathematical analysis of the filament drive tank with clamped Q is described in detail. Simulation and experimental results for two and one T5 28W lamp loads are presented to validate the analysis. Simulation and experimental results are in excellent agreement.
Keywords :
electric drives; electric heating; fluorescent lamps; lamp accessories; mathematical analysis; tanks (containers); clamped-Q resonant filament; filament drive tank; filament heating voltage; filament preheat capability; lamp loads; mathematical analysis; pin current problem; power 28 W; preheat frequency; preheat voltage variation; program start fluorescent ballast; resonant filament heating circuit; Clamps; Electronic ballasts; Heating; Integrated circuits; RLC circuits; Resonant frequency; Steady-state; Program-start fluorescent ballast; filament heating; filament heating cut-back; pin current; resonant filament heating circuit;
Conference_Titel :
Industry Applications Society Annual Meeting, 2014 IEEE
Conference_Location :
Vancouver, BC
DOI :
10.1109/IAS.2014.6978433
