EMC filter
US7944326B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 30, 2010 |
| Grant date | May 17, 2011 |
| Priority date | — |
| Expiry date | Mar 30, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/44
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An EMC active filter capable to maintain a low earth leakage current at all times, thus being compatible with RCD devices. The filter of the invention has an especially simple inductor's structure, where typically the power conductors pass straight through the filter, without windings, and most of the components can be implemented in a modular shunt circuit. Preferably the filter is realized by connecting the shunt module by an IDC device to the phase conductors, or directly to the line and load terminal, thus avoiding cutting and splicing high-current cables. The particular protection circuit of the filter prevents in-rush current at power on, and limits earth leakage current even in case of a fault in the line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.