Multi-input power transfer and uninterruptible power supply apparatus and methods of operation thereof
US6330176A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 15, 2000 |
| Grant date | Dec 11, 2001 |
| Priority date | — |
| Expiry date | Nov 15, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J3/007
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power transfer apparatus includes a first switch operative to couple and decouple a first AC power source to and from an AC power bus responsive to a first control signal and a second switch operative to couple and decouple a second AC power source to and from the AC power bus responsive to a second control signal. A first switch control circuit generates the first control signal responsive to a first AC source voltage produced by the first AC power source and to a first inhibit signal and generates a second inhibit signal responsive to a state of the first switch. A second switch control circuit generates the second control signal responsive to a second AC source voltage produced by the second AC power source and to the second inhibit signal and generates the first inhibit signal responsive to a state of the second switch. In some embodiments, the first control signal may comprise a current in a coil of a relay that couples and decouples the first AC power source to and from the AC power bus responsive to the coil current. A relay driver circuit may control the coil current responsive to the enable signal and the first inhibit signal. A current detector circuit may generate the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.