Method and apparatus for detecting and correcting improper dimmer operation
US9572215B2 · kind B2 · utility
6Cited by
12References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 26, 2011 |
| Grant date | Feb 14, 2017 |
| Priority date | — |
| Expiry date | Nov 15, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/59
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method is provided for detecting and correcting improper operation of a lighting system including a solid state lighting load. The method includes detecting first and second values of a phase angle of a dimmer connected to a power converter driving the solid state lighting load, the first and second values corresponding to consecutive half cycles of an input mains voltage signal, and determining a difference between the first and second values. When the difference is greater than a difference threshold, indicating asymmetric waveforms of the input mains voltage signal, a selected corrective action is implemented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.