Damping filter network having a tone decoder controlled damping switch
US12395104B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 12, 2022 |
| Grant date | Aug 19, 2025 |
| Priority date | — |
| Expiry date | Oct 27, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M5/458
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A damping filter network includes a damping filter having a damping filter resistor and a damping filter capacitor connected in series and a tone decoder having an input arranged to be connected to a system input and an output connected to a damping switch. The tone decoder has a pass-band between a lower frequency threshold and an upper frequency threshold, the damping filter resistor and the damping filter capacitor selected to perform damping at frequencies within the pass-band; wherein the tone decoder is configured to detect the frequency of the system input voltage and to close the switch so as to connect the damping filter to ground when the frequency is within the tone decoder pass-band and to open the switch to disconnect the damping filter from ground when the frequency is outside the pass-band.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.