Fluorescent lamps with high frequency power supply with inductiv

Details Fluorescent lamps with high frequency power supply with inductiv Fluorescent lamps with high frequency power supply with inductiv

1976-06-28

1977-08-16

Church, Craig E.

Electric lamp and discharge devices: systems

With cathode or cathode heater supply circuit

Plural load device systems

315101, 315105, 315206, 315219, 315DIG5, 315DIG7, H05B 4104, H05B 4129

Patent

active

040428524

ABSTRACT:
A high frequency power supply with inductive coupling and a SCR starter to light two fluorescent lamps is described. It supplies high frequency square waves to the fluorescent lamp for improved light output, efficiency and stability of operation. The rectified line voltage from a full wave rectifier is fed via a SCR starter to two transistors that form an inverter circuit. The inverter circuit is coupled to a ferrite core autotransformer. The secondary windings of the autotransformer are used to heat the filaments of the electrodes of the fluorescent lamp, and to form a reactive coupling along with inductors for stabilizing the arc discharge of the fluorescent lamp.

REFERENCES:
patent: 3396307 (1968-08-01), Campbell

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