Commutation cell and compensation circuit therefor
US10587257B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 4, 2014 |
| Grant date | Mar 10, 2020 |
| Priority date | — |
| Expiry date | Apr 4, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/567
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The present disclosure relates to a commutation cell and to a compensation circuit for limiting overvoltage across the power electronic switch of the commutation cell and for limiting a recovery current in a freewheel diode of the commutation cell. The power electronic switch has a parasitic emitter inductance. A variable gain compensation circuit generates a feedback from a voltage generated across the parasitic inductance of the emitter of the power switch at turn-on or turn-off of the power electronic switch. The compensation circuit provides the feedback to a control of the power electronic switch to reduce the voltage generated on the parasitic emitter inductance. A power converter including the commutation cell with the compensation circuit is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.