Electronic ballast deriving auxilliary power from lamp output

Electric lamp and discharge devices: systems – Current and/or voltage regulation – Automatic regulation

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

315209R, 315224, 315DIG4, H05B 3702

Patent

active

060231327

ABSTRACT:
An ballast includes a variable frequency boost circuit and a driven half-bridge inverter having a series resonant, direct coupled, parallel output. A control circuit includes a variable frequency driver section, a multivibrator section, and a sensing section. The variable frequency driver changes frequency smoothly, i.e. without discontinuities. The multivibrator section acts as a switch that is enabled or disabled by the sensing section for controlling the frequency of the inverter. Lamp current is required for continued operation of the control circuit. The multivibrator section controls starting by causing the inverter to produce an output signal having a trapezoidal envelope. In the event of an arc, the control circuit quenches the arc and the multivibrator periodically pulses the lamp to attempt to re-start the lamp.

REFERENCES:
patent: 5500576 (1996-03-01), Russell et al.
patent: 5808422 (1998-09-01), Venkitasubrahmanian et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Electronic ballast deriving auxilliary power from lamp output does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electronic ballast deriving auxilliary power from lamp output, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electronic ballast deriving auxilliary power from lamp output will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1683545

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.