Inverter input/output filter system
US4967334A · kind A · utility
48Cited by
6References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 12, 1989 |
| Grant date | Oct 30, 1990 |
| Priority date | — |
| Expiry date | Sep 12, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A filter system for removing selected frequencies from AC power provided on at least two phase lines and a neutral line includes a phase-to-phase filter for removing a first selected AC component at a first frequency from the AC power wherein the frequency component has a line-to-phase displacement within first or second ranges. A phase-to-neutral filter is also provided for removing a second selected AC component at a second frequency different from the first frequency from the AC power wherein the second frequency component has a line-to-line phase displacement outside of the first and second ranges.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.