Electronic constant power ballast for arc lamps

Details Electronic constant power ballast for arc lamps Electronic constant power ballast for arc lamps

1988-11-01

1990-03-20

Laroche, Eugene R.

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

315209T, 315DIG7, H05B 3702

Patent

active

049104403

ABSTRACT:
In a power supply for an arc lamp in which a power source feeds an inverter consisting of a bridge network of field effect transistors, the current to the inverter is controlled by a switching transistor in accordance with the voltage applied bridge network in such a way as to maintain a constant power level over a specified operating range. A master oscillator and associated divider circuits provide a clock for controlling the switching transistor and pulses for driving the field effect transistors of the inverter at a frequency which is a submultiple of the clock frequency.

REFERENCES:
patent: 4331914 (1982-05-01), Huber

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