Another new Ambient Corp. BPL patent: High current inductive coupler and current transformer for power lines

United States Patent 7,061,370

Abstract
There is provided an inductive power line data coupler. The coupler includes (a) a magnetic core having a high magnetic permeability at a data communication frequency and being configured to allow a power line of a power distribution system to be routed through the magnetic core to serve as a primary winding, (b) a data signaling circuit that provides a secondary winding through the magnetic core for coupling a data signal between the power line and a communication device, and (c) a choke coil coupled to the data signaling circuit for creating a flux-canceling power frequency current opposite in direction and comparable in magnitude to a power frequency current. The coupler may also include a circuit for sensing a level of current in the power line.
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Inventors: Cern; Yehuda (Brookline, MA)
Assignee: Ambient Corporation (Newton, MA)

Appl. No.: 425816
Filed: April 29, 2003

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Previous Ambient Approved Patent: Ambient Corporation`s patent for Inductive coupler for power line communications is approved by the U.S. Patent and Trademark office !!!