Industry Patents
Patent: 6969957
Ignition System For a High-Frequency High-Intensity Discharge Lamp System
(Click image for PDF of full patent)
| Patent Number: |
6969957 |
| Title: |
Ignition System For a High-Frequency High-Intensity Discharge Lamp System |
| Abstract: |
An ignition system for a high-frequency high-intensity discharge lamp
system of a type used for location-lighting during filming or other
entertainment venues includes a transformer with a pair of secondary
windings, each having a primary winding closely interwound. The secondary
windings, which are connected between the steady-state power source and
the discharge lamp, are wound for producing opposing magnetic fields with
substantial flux cancellation. The primary windings are wound to produce
voltage amplification and connected to an ignition circuit adapted to
produce high-voltage ignition spikes to turn on the discharge lamp. The
system also includes a resonant circuit between the steady-state power
source and the transformer. The ignition and resonant circuits are
temporarily energized to produce a voltage for igniting the lamp. The
advantage of secondary windings with opposing magnetic fields in that a
sufficient turns ratio is present to allow the transformer to operate
effectively during ignition, while at the same time the opposing magnetic
fields result in a low impedance with a reduction in both heat and
inductive loss during steady-state operation of the lamp system.
|
| Country of Issue: |
US |
| First Named Inventor: |
Ellams |
| Assignee: |
Power Gems |
| Continuation or Divisional of: |
|
| International Classification: |
H05B 37/00 |
| US Classification: |
315/289 |
| Issue Date: |
11-29-2005 |
| Filing Date: |
04-01-2004 |
| Application : |
10/815520 |
| Notes: |
|
| Link to Patent at freepatentsonline.com: |
6969957 at Freepatentsonline |
| Link to World Patent Family1: |
World Patent Family at European Patent Office |
| Link to Google Patents1: |
6969957 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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