プッシュプル高周波インバーターの短絡モード動作を用いた放電ランプ始動点灯回路

Discharge lamps require high voltage when starting. On the other hand, after lighting discharge lamps are supplied lower voltage as compared with that when starting to maintain the stable discharge.
In this paper，an application of the push-pull type of high frequency inverter using short-circuit mode operation to the starting and lighting technique and circuit for discharge lamps is proposed. In the proposed method，high voltage is produced by setting the period of short-circuit mode long when starting and after lighting the stable lighting of discharge lamps is achieved by shortening the period of short-circuit mode. Then，the starting circuit is designed and made on an experimental basis. It is clarified by the experiment that the proposed method of starting discharge lamps is very avaliable from a view of the starting characteristics and the circuit efficiency.