Communication system and PLC network

• US 20070013492A1
• Filed: 07/12/2005
• Published: 01/18/2007
• Est. Priority Date: 07/12/2005
• Status: Active Grant

• Current Assignee: Yazaki Corporation
• Original Assignee: Yazaki Corporation
• Inventors: Kawamura, Atsushi, Shiraishi, Naoyuki, Yanagida, Yo, Sugimoto, Terumitsu
• Granted Patent: US 7,307,519 B2
• Time in Patent Office: Days
• US Class Current: 340/310.170
• CPC Class Codes: H02J 13/00007 using the power network as support for the transmission
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y04S 40/121 using the power network as support for the transmission

Abstract

A communication system includes a main power line and a plurality of PLC networks connected to the main power line in common. At least one of the PLC networks includes a plurality of nodes. One node of the nodes in the PLC network is connected to the main power line. The other nodes are interconnected via a sub power line so as to receive power from the main power line through the one node. An inductor provided in the one node is connected to the main power line and the sub power line.

Claims

1. A communication system, comprising:

a main power line; and

a plurality of PLC networks connected to the main power line in common,

wherein at least one of the PLC networks includes a plurality of nodes;

wherein one node of the nodes in the PLC network is connected to the main power line;

wherein the other nodes are interconnected via a sub power line so as to receive power from the main power line through the one node; and

wherein the one node has an inductor that is connected to the main power line and the sub power line.

2. The communication system as set forth in claim 1, wherein a circuit for reserving impedance in the one node serves as the inductor.

3. The communication system as set forth in claim 1, wherein the other nodes are sub controllers that are respectively connected to loads;

and

wherein the one node is a master controller that controls the loads through the sub controllers.

4. A PLC network, comprising:

a plurality of nodes,

wherein one node of the nodes is connected to a main power line, the main power line being connected to other PLC network in common;

wherein the other nodes are interconnected via a sub power line so as to receive power from the main power line through the one node; and

wherein the one node has an inductor that is connected to the main power line and the sub power line.

5. The PLC network as set forth in claim 4, wherein a circuit for reserving impedance in the one node serves as the inductor.

6. The PLC network as set forth in claim 4, wherein the other nodes are sub controllers that are respectively connected to loads;

and

wherein the one node is a master controller that controls the loads through the sub controllers.