Starting circuit for inverter operated gaseous discharge lamps

Details Starting circuit for inverter operated gaseous discharge lamps Starting circuit for inverter operated gaseous discharge lamps

1975-09-26

1977-01-18

La Roche, Eugene R.

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Plural cathode and/or anode discharge device load

315151, 315158, 315224, 315263, 315335, 315DIG7, H05B 4122

Patent

active

040041883

ABSTRACT:
A circuit arrangement for starting a linear metal halide arc discharge lamp while in a transistor switching bridge inverter circuit in the running inverter mode. A high voltage pulse generator is connected to a trigger electrode which is arranged for capacitive coupling to the lamp to supply pulsed high voltage thereto. A synchronizing circuit serves to synchronize application of the high voltage pulse to the trigger electrode with the turn-on of either polarity of the switching inverter. An inhibit circuit prevents high voltage pulsing of the trigger electrode after lamp ionization when the lamp is in a normal operational mode.

REFERENCES:
patent: 3514667 (1970-05-01), Dessoulavy et al.
patent: 3700960 (1972-10-01), Lake
patent: 3733541 (1973-05-01), Elms
patent: 3789266 (1974-01-01), Polman et al.
patent: 3875471 (1975-04-01), Buck
patent: 3881147 (1975-04-01), Ueda et al.
patent: 3882356 (1975-05-01), Stehlin
patent: 3896336 (1975-07-01), Schreiner et al.

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