Control system and control method for uninterruptible power supply
US5781448A · kind A · utility
58Cited by
9References
21Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Nov 2, 1995 |
| Grant date | Jul 14, 1998 |
| Priority date | — |
| Expiry date | Nov 2, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/0048
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Amount of alternating current power is calculated using measuring units for alternating current voltage and alternating current. Value of direct current is calculated using the calculated alternating current power and an efficiency table. An initial life time of a battery is predicted using the calculated direct current value and a battery life time table. Life time corresponding to an actual consumed amount is repeatedly updated using a detected direct current value and an updated life time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.