Power interruption detection
US6545481B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 2000 |
| Grant date | Apr 8, 2003 |
| Priority date | — |
| Expiry date | Nov 20, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J9/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An AC power interruption detection system is provided which compares an AC signal with a phased AC reference signal to determine the presence or absence of an AC power signal. By comparing the AC power signal with a phased reference signal, power interruption detection occurs within a predetermined minimum time frame, for example, with ½ cycle. In exemplary embodiments, the detection system includes AC power signal frequency multiplying circuitry to improve speed and performance. In other exemplary embodiments, the detection system includes threshold detection circuitry to detect undervoltage (e.g., brownout) and/or overvoltage (e.g., spike) conditions of the AC power. In system-level embodiments, the interruption detection system is implemented in a switch array environment in which a switch controller controls a redundant switch array based on the detection signal generated by the power interruption detection system to couple a selected AC power line, from one or more redundant AC power lines available, to a load.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.