Electronic constant power ballast for arc lamps

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

H - Electricity

05

B

315/54

H05B 37/02 (2006.01) H05B 41/288 (2006.01) H05B 41/392 (2006.01)

Patent

CA 1278024

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 divided 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.

551271

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