Magnetic low voltage dimmer
US7482758B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 3, 2006 |
| Grant date | Jan 27, 2009 |
| Priority date | — |
| Expiry date | Mar 8, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S315/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention provides a magnetic low voltage dimmer circuit that reduces DC magnetizing current which may be present in a dimmer system. The dimmer circuit delivers an RMS value of an AC supply voltage to a load while preventing or reducing a DC magnetizing current from damaging the dimmer circuit and/or load. The dimmer circuit includes a shutdown circuit which detects whether a DC voltage, corresponding to the DC current, is present across a circuit component and whether the DC voltage has reached or exceeded a predetermined voltage reference level, rendering the component non-conductive and thus preventing the DC magnetizing current from flowing through a load.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.