Multilevel AC/DC converter for traction applications
US7558087B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 1, 2008 |
| Grant date | Jul 7, 2009 |
| Priority date | — |
| Expiry date | Feb 1, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/49
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power supply system for railway traction applications including a multilevel AC/DC converter. The converter comprises a plurality of series-connected single-stage cycloconverters or direct AC frequency converters connected between an AC supply line and a traction transformer. The transformer is operable at a transformer nominal frequency below 3 kHz and above the AC line frequency. On the secondary side of the transformer, more than one parallel-connected secondary converter are provided and connected to a DC link. In case of failure of one of the secondary converters, the multilevel AC/DC converter may continue to operate with reduced power delivered by the remaining operating levels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.