Bidirectional power line filter
US4342013A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 25, 1980 |
| Grant date | Jul 27, 1982 |
| Priority date | — |
| Expiry date | Aug 25, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E40/40
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A bidirectional power line filter provides distributive capacitance to accomplish filtering is electrically connected between the power lines and the ground wire in a power distribution system. In addition to lumped parameter or fixed value capacitors, a distributive capacitance is provided by use of a printed circuit board upon which the electrical components forming the filter are mounted. A specially formed dual inductor is wound as a common-core inductor using two toroidal cores preferably formed of ferrite each having a different permeability verus frequency curve. The inventive filter is intended for use in a three-phase Y-connected power distribution system, as well as in a conventional single-phase system. An additional multiple outlet system may be added to the bidirectional filter and it is also formed having distributive capacitance by employing a length of printed circuit board material to which the plurality of outlets are connected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.