INSTANTANEOUS STARTING SYSTEM FOR DISCHARGE LAMP

摘要

A system for the instantaneous starting of a fluorescent lamp includes a circuit connected across the lamp having a start compensation device to apply a half-sinusoidal wave derived from a commercial power supply and oscillatory means to provide a high frequency oscillation across the lamp. The oscillatory means may include a symmetrical silicon switch (SSS) or an inversely blocking two-terminal thyristor and an oscillation adjusting inductance and capacitor. The start compensation device may be a start compensation winding wound on the same core as a current limiting winding in series with the lamp, and a start compensation diode may be connected in series with the start compensation winding. Alternatively, the diode alone may serve as the start compensation device. A thermistor having a positive characteristic may be connected in the circuit across the lamp.