Multi-level power converter
US7489487B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 29, 2006 |
| Grant date | Feb 10, 2009 |
| Priority date | — |
| Expiry date | Mar 16, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/487
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A multi-level power converter is disclosed. The converter includes a DC power source having N (N is an Integer more than two)-level voltage potentials, and a plurality of switching legs connected in parallel to the DC power source. The switching leg has switching elements in series connection, and clamp diodes connected between intermediate DC potential terminals to middle points of the switching legs. The converter is provided with a control means for supplying gate pulses to the switching elements, and a supervising means for supervising every switching element to output a failure signal. The converter further includes a logic operating means for detecting an over-current failure of main circuit elements to output a device fault signal using the failure signals An operation of the logic operating means at least includes AND condition of at least two failure signals to output the device fault signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.