Combined phase-shifting directional zero phase sequence current filter and method for using thereof
US5416688A · kind A · utility
5Cited by
17References
10Claims
0Family size
Inventor
Key dates
| Filing date | Jul 7, 1993 |
| Grant date | May 16, 1995 |
| Priority date | — |
| Expiry date | Jul 7, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E40/40
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The windings of a wye-connected primary are tapped and connected in a zig-zag fashion to secondary windings. The resulting filter provides phase shifting of load currents and directional filtering of zero phase sequence harmonic currents. The taps may be varied to adjust the voltage output of the apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.