Apparatus and method for rapid fault detection and transfer in a utility-interactive uninterruptible power supply
US6768223B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 1, 2001 |
| Grant date | Jul 27, 2004 |
| Priority date | — |
| Expiry date | Sep 5, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J9/068
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method and apparatus are disclosed for improving the disturbance pass through characteristics of a line interactive uninterruptible power supply (“UPS”). One disclosed technique uses a naturally commutated fast utility disconnect switch, wherein the switch is self commutated by the UPS inverter forcing the current through the switch to zero. A second disclosed technique uses a gate commutated fast utility disconnect switch and the associated snubber circuits, wherein the fast utility disconnect is opened quickly upon occurrence of a line fault and the energy generated in interrupting the line current is dissipated by the snubber circuits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.