Electromagnetic interference filter having controlled impedance magnitude
US12294346B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 11, 2022 |
| Grant date | May 6, 2025 |
| Priority date | — |
| Expiry date | Jul 3, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H1/0007
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Electromagnetic interference filter for suppressing interferences in a DC network, the network comprising a source device powering a load device via a bus connectable to the source device at an input side and to the load device at an output side.The EMI filter being connected to the bus and comprising an active filter circuit having an active filter bandwidth and being configured to sense a noise component superimposed in the bus and inject a cancelling noise in the bus to suppress said noise component. The EMI filter further comprises a passive circuit including a source circuit connected to the bus at the input side and a passive load circuit to the bus connected at the output side, the passive circuit being configured to provide, at least at a cutoff frequency of the active filter bandwidth, a source impedance at the input side that differs from a load impedance at the output side by a factor of at least two.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.