Patent ID: 9287933
Filing Date: 2016-03-15
CPC Classification: H04B,H04L

Claim Text:
1. An apparatus for three-phase power line communication, the apparatus comprising: a connector connected to each phase of a three-phase power line, so that a communication signal transmitted to a communication target device provided to each phase is transferred thereto; and a controller configured to output the communication signal and control the connector, wherein the connector includes: a coupling transformer configured to convert the communication signal output from the controller into a form capable of being transferred to the three-phase power line; and a coupling capacitor configured to convert the communication signal into a form capable of being transferred to each phase, wherein the controller is further configured to control the connector such that the communication signal is selectively transmitted to at least one phase of each phase of the three-phase power line, and wherein the controller includes a zero cross detector configured to detect a phase of each phase using a zero cross principle.