Power supply for an ac discharge lamp

Details Power supply for an ac discharge lamp Power supply for an ac discharge lamp

1981-08-18

1983-10-25

Dixon, Harold

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

315205, 315209R, 315287, 315226, G05F 100

Patent

active

044121563

ABSTRACT:
A power supply for an ac discharge lamp utilizes a switching transistor for turning on and off the dc current from a dc power circuit. The dc current is then fed to a low pass filter for supplying the dc power to the lamp with alternating polarity. A voltage and a current sensing circuits effective to control the dc power to a substantially constant level is connected to a control circuit for controlling the on and off times of the switching transistor. In such a power supply, the voltage and current sensing circuits are made up of transformers whereby the high-voltage circuit section is effectively separated and insulated from the low-voltage circuit section so as to prevent any possible electrical shocks.

REFERENCES:
patent: 3999100 (1976-12-01), Dendy
patent: 4162429 (1979-07-01), Elms et al.
patent: 4356433 (1982-10-01), Linden

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