Method for symmetrizing asymmetric faults
US6369543B1 · kind B1 · utility
19Cited by
4References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 24, 2000 |
| Grant date | Apr 9, 2002 |
| Priority date | — |
| Expiry date | Nov 24, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P29/032
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention concerns a method for symmetrizing asymmetric faults occurring within a pull chain comprising a synchronous or asynchronous motor controlled by a two-level or multi-level inverter consisting of static switches using semiconductors such as IGBT or bipolar transistors. The invention comprises detecting whether the fault connects or may connect a motor phase with the top point or the bottom point of the inverter power supply, and short-circuiting only the half of the inverter affected by the fault on the basis of the detection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.