DC UPS with auto-ranging backup voltage capability
US7763993B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 16, 2008 |
| Grant date | Jul 27, 2010 |
| Priority date | — |
| Expiry date | Jan 20, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/0024
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A direct current (DC) uninterruptible power supply (UPS) having auto-ranging battery backup voltage capability is provided. At least one input is configured. A rectifier is connected to the at least one input. A common node is connected to the rectifier. At least one output is connected to the common node. A battery backup circuit is connected to the common node. The battery backup circuit includes first and second strings of batteries, a switch connected between a positive terminal of the first string of batteries and a negative terminal of the second string of batteries, and a plurality of steering diodes connected to the first and second strings of batteries and the switch to maintain current flow in a first direction. The switch is operable to place the first and second strings of batteries in series when closed, and operable to place the first and second strings of batteries in parallel when open.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.