Protective circuit for a converter
US7649724B2 · kind B2 · utility
2Cited by
7References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 15, 2007 |
| Grant date | Jan 19, 2010 |
| Priority date | — |
| Expiry date | Jul 8, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H7/1227
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a protective circuit for a converter having a plurality of phases, for each phase current of the phases, a signal proportional to the respective phase current is applied to a transformer circuit that, below and in the area of a limiting frequency, functions as a low-pass filter with the limiting frequency, and above the limiting frequency, functions as a divider. The outputs of the transformer circuit are applied to a maximum generator for forming the absolute value maximum. This maximum is fed to a comparator in which the maximum is compared to a reference value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.