EMC filtering device in a variable speed drive
US7738268B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 1, 2007 |
| Grant date | Jun 15, 2010 |
| Priority date | — |
| Expiry date | Aug 12, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/123
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention relates to a filtering device connected between a rectifier module of a variable speed drive and an alternating current power supply network, the filtering device comprising an EMC filter comprising a common-mode inductor having a winding on each phase of the power supply network, the windings being magnetically coupled together. The filtering device comprises a shunt circuit connected in parallel with at least one of the windings of the common-mode inductor, the shunt circuit comprising passive components and making it possible to shunt a common-mode current flowing in the common-mode inductor in a frequency zone about a resonance frequency of the EMC filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.