Electric lamp and discharge devices: systems – Pulsating or a.c. supply – Plural cathode and/or anode discharge device load
Patent
1975-04-23
1976-04-27
Kominski, John
Electric lamp and discharge devices: systems
Pulsating or a.c. supply
Plural cathode and/or anode discharge device load
315DIG7, 315100, 315226, 315241S, 315241P, 315243, H05B 4134, H05B 4129
Patent
active
039537633
ABSTRACT:
A circuit for the repetitively pulsed operation of a xenon arc discharge lamp. A first SCR is responsive to a first control circuit when fired to allow the charging of a capacitor through a first inductor from a DC energy source. A second SCR is responsive to a second control circuit, and when fired connects the capacitor through a second inductor to a lamp to provide an operating current pulse for the lamp. Also, upon firing of the second SCR, the capacitor supplies a voltage pulse to a pulse transformer which in turn generates a high voltage pulse for ionizing the lamp. The first SCR is responsive to its control circuit to be conductive only when the capacitor is discharged and the second SCR is responsive to its respective control circuit to be conductive only when the capacitor is fully charged. In actual operation, one SCR must have been non-conducting for a predetermined time before the other SCR is allowed to become conductive thereby to prevent shoot-through.
REFERENCES:
patent: 3417288 (1968-12-01), Cason
patent: 3443154 (1969-05-01), Hoekstra et al.
patent: 3749976 (1973-07-01), Colyn
General Electric Company
Kominski John
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