Parallel-tuned electronic ballast with special output voltage wa

Details Parallel-tuned electronic ballast with special output voltage wa Parallel-tuned electronic ballast with special output voltage wa

1995-03-14

1998-04-07

Gonzalez, Frank

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Silicon controlled rectifier ignition

315244, 315241R, 315227R, 315DIG5, H05B 3702

Patent

active

057368198

ABSTRACT:
Power to a self-oscillating inverter ballast is supplied from a DC voltage source through an inductor means having two separate windings on a common magnetic core--with one winding being positioned in each leg of the power supply. The inverter is loaded by way of a parallel-tuned L-C circuit connected across the inverter's output, thereby providing an output voltage thereat. The output voltage consists of sinusoidally-shaped voltage pulses of alternating polarity, with a distinct brief period of discontinuity at or near the cross-over points. A fluorescent lamp is connected by way of a current-limiting capacitor with the inverter's output.

REFERENCES:
patent: 4277726 (1981-07-01), Burke
patent: 5189342 (1993-02-01), Nilssen

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