Power supply with battery backup
US4694194A · kind A · utility
22Cited by
4References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 4, 1985 |
| Grant date | Sep 15, 1987 |
| Priority date | — |
| Expiry date | Nov 4, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J9/061
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A pulsed power supply having a filter output and a battery backup includes electronic apparatus to sense when the AC source is failing. When the pulsed supply output has the same pulses as that which would be produced by the battery, the supply switches to battery backup mode. As the AC source returns, the supply switches to AC supply mode when the AC is at a level where the pulses produced by the supply would be the same as are actually being produced by the battery backup.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.