Signal Coupling Apparatus For Power Line Communications Using A Three-Phase Four-Wire Power Line
First Claim
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1. A signal coupling apparatus for power line communications using a three-phase four-wire power line, comprising:
- a first signal coupler connected to a first-phase power line;
a second signal coupler connected to a second-phase power line;
a third signal coupler connected to a third-phase power line;
a switching unit selectively connected to the first signal coupler, the second signal coupler, or the third signal coupler; and
a control circuit outputting a switching control signal to electrically connect the switching unit to the first signal coupler, the second signal coupler or the third signal coupler.
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Abstract
A signal coupling apparatus for power line communications includes an impedance matching transformer and a transmission mode control circuit for high data rate power line communications on a three-phase four-wire distribution line. Therefore, it is possible to improve the efficiency of power line communications, to minimize signal loss, and to construct an optimal high voltage distribution path.
25 Citations
5 Claims
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1. A signal coupling apparatus for power line communications using a three-phase four-wire power line, comprising:
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a first signal coupler connected to a first-phase power line; a second signal coupler connected to a second-phase power line; a third signal coupler connected to a third-phase power line; a switching unit selectively connected to the first signal coupler, the second signal coupler, or the third signal coupler; and a control circuit outputting a switching control signal to electrically connect the switching unit to the first signal coupler, the second signal coupler or the third signal coupler. - View Dependent Claims (2, 3, 4, 5)
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Specification