Industry Patents
Patent: 7382595
Low Voltage Overcurrent Protection For Solid State Switching System
(Click image for PDF of full patent)
| Patent Number: |
7382595 |
| Title: |
Low Voltage Overcurrent Protection For Solid State Switching System |
| Abstract: |
A current sensing transformer having a low impedance primary winding is
connected in series with a filter and load circuit supplied with output
current by a high frequency switching PWM power supply such as a sinewave
dimmer. Sensed output current is supplied to a microprocessor based
programmable controller. The controller performs a routine including a
family of overcurrent tests. Tests of the family are satisfied by the
presence of different output current values for different time durations.
At least one of the tests is enabled only at low requested output
voltages or dimming levels. In response to satisfaction of any of the
tests, a series power switching stage of the power supply is rendered
nonconductive to shut down the power supply.
|
| Country of Issue: |
US |
| First Named Inventor: |
Thurk, Rasmussen, Suomi |
| Assignee: |
Electronic Theatre Controls |
| Continuation or Divisional of: |
|
| International Classification: |
H02H 9/08 |
| US Classification: |
361/93.1 |
| Issue Date: |
06-03-2008 |
| Filing Date: |
05-25-2005 |
| Application : |
11/137053 |
| Notes: |
|
| Link to Patent at freepatentsonline.com: |
7382595 at Freepatentsonline |
| Link to World Patent Family1: |
World Patent Family at European Patent Office |
| Link to Google Patents1: |
7382595 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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