Capacitor ballast for a compact fluorescent lamp

摘要

References(3) A capacitor ballast that provides stable operation for a special kind of compact lamp with a short discharge channel is described. Three capacitor ballasts modified to improve operating performance are studied. They are: a capacitor ballast with an additional discharge circuit, a capacitor ballast with a variable capacitor, and a capacitor ballast with small series inductance. Efficacy of the lamp using the modified capacitor ballasts is about 3 to 10% lower than the efficacy with a choke ballast. However, system efficacy for the modified capacitor ballast is nearly equal, or 14% higher than, the efficacy with a choke ballast due to low power dissipation in the capacitor ballast. Furthermore, the weight of the capacitor ballst is one sixth that of a choke ballast. A rapid starting circuit is also developed for the capacitor ballast.