Electrical circuit for converting electrical energy having capacitors and controller for maintaining a nominal charge on each capacitor
US5940285A · kind A · utility
14Cited by
12References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 8, 1997 |
| Grant date | Aug 17, 1999 |
| Priority date | — |
| Expiry date | Aug 8, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/4837
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A multilevel converter including, in particular, a capacitor for each of its cells, and control means comprising means for evaluating the mean voltage across the terminals of each of the capacitors, means for measuring any difference on each of said capacitors between the evaluated mean charge voltage and the nominal mean charge voltage of the capacitor, and additional control means changing the time positions of the converter control signals in a direction such that the measured difference is reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.