Discharge lamp operating circuit

Details Discharge lamp operating circuit Discharge lamp operating circuit

1980-07-01

1982-09-07

Dixon, Harold A.

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Periodic switch in the primary circuit of the supply...

315177, 315239, 315244, 315DIG7, H05B 3702

Patent

active

043486150

ABSTRACT:
A lamp operating circuit comprising a DC power source, an inverter including step-up transformer inductance windings and a controlled transistor switch connected across the output of the DC source, and a high frequency oscillator coupled to the transistor switch for operating the same at predetermined intervals. A low wattage HID lamp is connected across the inverter through a ballast capacitor series connected to one terminal of the lamp and a ballast inductance coupled in series with the other lamp terminal. The ballast inductance and ballast capacitor are selected to resonate sinusoidally at a frequency having a half period coinciding with the on-time of the transistor.

REFERENCES:
patent: 3247422 (1966-04-01), Schultz
patent: 3882354 (1975-05-01), May
patent: 4023067 (1977-05-01), Zelina
patent: 4145636 (1979-03-01), Doi
patent: 4234823 (1980-11-01), Charlot

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