Power line communication system

Details Power line communication system Power line communication system

1989-02-16

1990-02-20

Orsino, Joseph A.

Communications: electrical

Systems

Selsyn type

333177, H04M 1104

Patent

active

049030060

ABSTRACT:
A power line communication system which includes an electrical power line having one or more loads which feed objectionable electrical noise back into the power line. The electrical noise is attenuated across a broad frequency range to enable effective communication over the power line by a directional common mode trap located between the point where the communication signals are applied to the power line and the source of the electrical noise. The trap requires only a capacitor for each electrical phase and a 1:1 transformer having a magnetic core and single turn, straight through windings. The trap is connected to provide a low impedance path to ground for the electrical noise, while providing a high impedance to ground for the communication signals.

REFERENCES:
patent: 4065763 (1977-12-01), Whyte et al.
patent: 4668934 (1987-12-01), Shuey
patent: 4686382 (1987-08-01), Shuey

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