Apparatus and a method for voltage conversion
US6507503B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 7, 2001 |
| Grant date | Jan 14, 2003 |
| Priority date | — |
| Expiry date | Aug 7, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/758
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An apparatus for converting direct voltage into alternating voltage and conversely comprises a VSC-converter (8) having a direct voltage intermediate link (9) and at least one phase leg (12, 13). Each current valve (14-17) of the phase legs has at least one semiconductor device of turn-off type and a rectifying member connected in anti-parallel therewith. A transformer (19) has two opposite ends of a first winding (20) thereof connected to an output (21, 22) each of the VSC-converter and a second winding (23) connected to a direct converter having at least one phase leg. Each of the current valves of the direct converter being able to conduct current and block voltage in both directions and to turn on by gate control. A midpoint (27) of the phase leg of the direct converter is provided with a phase output for forming a terminal for the alternating phase voltage between this output and a further phase output (28).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.