High frequency ballast-ignition system for discharge lamps

Details High frequency ballast-ignition system for discharge lamps High frequency ballast-ignition system for discharge lamps

1982-08-02

1984-11-20

Laroche, Eugene R.

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Periodic switch in the primary circuit of the supply...

315102, 315105, 315221, 315223, 315282, 315DIG7, H05B 4129

Patent

active

044841086

ABSTRACT:
A high frequency oscillator-inverter ballast-ignition system for a discharge lamp includes a leakage reactance transformer that forms a part of the oscillator-inverter and also couples same to the discharge lamp. An impedance element electrically couples the primary and secondary windings of the transformer in additive phase to provide more reliable lamp ignition over a wider range of voltage and temperature than was heretofore possible. The preheat time period of the lamp cathodes can be better controlled by a proper choice of the transformer heater winding turns.

REFERENCES:
patent: 4188661 (1980-02-01), Bower et al.
patent: 4286194 (1981-08-01), Sherman

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