Bridging unit
US8456786B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 24, 2011 |
| Grant date | Jun 4, 2013 |
| Priority date | — |
| Expiry date | Dec 9, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/49
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A converter cell of a modular converter is provided. The converter cell includes a bridging unit which has a mechanical bistable relay, an electronic switch, a drive for switching the relay and the electronic switch, and an energy store for supplying power to the mechanical relay, the electronic switch and the drive. The drive includes passive overvoltage detection configured to charge the energy store if the overvoltage is exceeded. The drive includes an additional switch which is closed when a voltage on the energy store exceeds a predefined value, and the drive supplies current from the energy store to at least one of the relay and the electronic switch. The drive has hysteresis, such that, if the voltage on the energy store is undershot, at least one of the relay and the electronic switch is still supplied with current from the energy store.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.