Industry Patents
Patent: 6054816
Active Snubbing in a Discharge Lamp Ballast
(Click image for PDF of full patent)
| Patent Number: |
6054816 |
| Title: |
Active Snubbing in a Discharge Lamp Ballast |
| Abstract: |
A snubbing network is provided for reducing electromagnetic ("EM")
radiation from and power dissipation of a lamp discharge ballast. The
snubbing network employs at least one active device. That device being a
switch coupled in parallel with the modulating switch within a converter
of the ballast. The snubbing switch, in conjunction with a current
limiting inductor, and a voltage change rate limiting capacitor serve to
substantially eliminate reverse recovery current within a freewheeling
diode of the converter prior to closing the larger (modulating) switch.
Reducing the reverse recovery current before closing the modulating switch
helps minimize power dissipation during switch closure. A benefit of
reduced power dissipation is a reduction in EM radiation from the lamp
ballast to noise sensitive electronic components placed nearby.
|
| Country of Issue: |
US |
| First Named Inventor: |
Jurek, Stultz |
| Assignee: |
High End Systems |
| Continuation or Divisional of: |
|
| International Classification: |
G05F 1/00 |
| US Classification: |
315/291 |
| Issue Date: |
04-25-2000 |
| Filing Date: |
06-02-1997 |
| Application : |
08/867566 |
| Notes: |
As used in The Studio Color 'S' Electronic lamp power supply |
| Link to Patent at freepatentsonline.com: |
6054816 at Freepatentsonline |
| Link to World Patent Family1: |
World Patent Family at European Patent Office |
| Link to Google Patents1: |
6054816 at Google Patents |
1. The Google Patents and World Patent Family links will likely not work until a few weeks
after the patent has issued - they take a while to get new patents in their systems.
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