Pulse circuit for gaseous discharge lamps

Details Pulse circuit for gaseous discharge lamps Pulse circuit for gaseous discharge lamps

H - Electricity

05

B

315/54

H05B 41/26 (2006.01) H05B 41/30 (2006.01)

Patent

CA 1115340

ABSTRACT OF THE DISCLOSURE Circuit operating from a direct current source applies DC pulses to a high pressure sodium vapor lamp to improve the color rendition of the lamp. The circuit includes a first inductor, a diode and a capacitor connected across a DC source, and a second inductor, controlled thyristor switch and sodium vapor lamp connected in series across the cap- acitor, and a timing circuit for periodically turning on the switch at predetermined intervals. The circuit provides for charging the capacitor, commutating the controlled switch, and discharge of the capacitor to enable subsequent re-charging thereof, so as to provide the desired pulsed operation of the lamp. This mode of operating also provides for application of voltage to the lamp which is substantially higher than the supply voltage.

291190

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