Apparatus for operating discharge lamps

Details Apparatus for operating discharge lamps Apparatus for operating discharge lamps

1981-02-23

1983-06-14

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Plural power supplies

Discharge device and/or rectifier in one of the supply circuits

315173, 315174, 315224, 315226, 315247, 315DIG7, H05B 4129

Patent

active

043885616

ABSTRACT:
A low frequency AC voltage is rectified through a full-wave rectifier to obtain a pulsating voltage, which is superimposed with an auxiliary voltage of a predetermined level provided from an auxiliary power source, and the resultant composite pulsating voltage is inverted at an inverter to a high frequency voltage. The high frequency voltage thus obtained from the inverter is used to operate a discharge lamp. Minimum value V.sub.min of the resultant voltage is set to be 1/3 to 4/5 of the maximum value V.sub.max of the resultant voltage.

REFERENCES:
patent: 4017785 (1977-04-01), Perper
patent: 4042856 (1977-08-01), Steigerwald
patent: 4109307 (1978-08-01), Knoll
IES Transaction, Dec. 1969; "Initial Characteristics of High-Intensity Discharge Lamps on High-Frequency Power," John H. Campbell, pp. 713-722.

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