Common mode voltage feed fault protection
US12352825B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 14, 2022 |
| Grant date | Jul 8, 2025 |
| Priority date | — |
| Expiry date | Sep 2, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H7/125
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A system includes a generator. Three AC feeders are connected for feeding AC output from the generator. A rectifier is electrically connected to the three AC feeders and to a load via a first DC feeder and a second DC feeder. A first resistor connects between a first one of the DC feeders and ground. A first voltage sensor is operatively connected to detect voltage across the first resistor. A second resistor connects between the second DC feeder and ground. A second voltage sensor is operatively connected to detect voltage across the second resistor. A controller is configured to monitor for changes in common mode voltage based on the input from the first sensor and from the second sensor, and to determine presence of a fault if change in the common mode voltage exceeds a predetermined threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.