Adjustable UPS protection
US8606425B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 27, 2010 |
| Grant date | Dec 10, 2013 |
| Priority date | — |
| Expiry date | Feb 4, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J9/062
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An uninterruptable power supply (UPS) designed to switch power inputs between an alternating current mode and a battery mode by adjusting the amplitude and/or frequency windows of the input voltage so that the uninterruptible power supply accepts the unstable voltage and/or frequency. This prevents the uninterruptible power supply to switch back to the battery mode during a transfer time between the battery mode and the AC mode. The uninterruptable power supply includes a control circuit. The control circuit modifies the monitored value and/or actual amplitude and/or the frequency window when unstable amplitude and/or an unstable frequency are detected at the input terminal of the input voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.