Three-point converter and method for its operation
US6219265A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 2, 1999 |
| Grant date | Apr 17, 2001 |
| Priority date | — |
| Expiry date | Jul 2, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/487
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A three-point converter with NPC diodes disposed between bridge halves and a center tap of an intermediate circuit is proposed. A decoupling network is provided for the upper bridge half, a first input of which decoupling network is connected to a positive pole of the intermediate circuit and a first output of the decoupling network is connected to a positive pole of the three-point converter. Furthermore, provision is made of a further decoupling network for the lower bridge half, a first input of the further decoupling network is connected to a negative pole of the intermediate circuit and a first output of the further decoupling network is connected to a negative pole of the three-point converter. The remaining inputs of both of the decoupling networks are connected to the center tap of the intermediate circuit. The remaining outputs of both of the decoupling networks are connected via the NPC diodes to the upper and lower bridge halves. A commutation voltage for the main switches of the upper and lower bridge halves is decoupled from a halved intermediate circuit voltage (V.sub.dc /2) independently of one another by the decoupling networks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.