Electrical filter for resistively earthed systems
US10925197B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 20, 2019 |
| Grant date | Feb 16, 2021 |
| Priority date | — |
| Expiry date | Sep 20, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/123
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Methods and systems of suppressing ground faults. One system includes a power center including a transformer and a ground fault relay. The system also includes a first motor electrically connected to the power center. The system also includes a first variable speed drive connected to the first motor. The first variable speed drive is configured to vary the speed of the first motor. The system also includes a first common mode choke connected in a series-type connection between the power center and the first variable speed drive. The first common mode choke is configured to suppress a ground current induced by the first variable speed drive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.