Uninterruptible power system with backfeed detection and method of operating the same
US9431853B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 12, 2013 |
| Grant date | Aug 30, 2016 |
| Priority date | — |
| Expiry date | Dec 28, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J9/062
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An uninterruptible power system and a method of operating the same are disclosed. The uninterruptible power system includes a power conversion apparatus, a switch unit, a first voltage detection unit, a second voltage detection unit, and a comparison unit. The power conversion apparatus receives an AC power source and converts the AC power source to supply an AC load. The first voltage detection unit detects an input voltage of the power conversion apparatus and produces a first voltage signal. The second voltage detection unit detects an output voltage of the switch unit and produces a second voltage signal. Under the AC power source is disabled and the power conversion apparatus provides a backup power to supply the AC load, the switch unit is detected in a fault operation when the first voltage signal is compared by the comparison unit to equal to the second voltage signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.