Power line communications system, power line communication device, and connector device

A power line communication system in which a vehicle and a feeding device are connected to each other with a charging cable, and power line communication is performed between a power line communication device installed in the vehicle and the feeding device via the charging cable,

• the charging cable comprising two power supply wires,
• the power line communication device comprising:
• two internal power supply wires respectively connected to the power supply wires of the charging cable;
• a filter circuit connected to and between the two internal power supply wires;
• and
• an electromagnetic guidance type signal converter comprising a primary coil provided in one or both of the internal power supply wires, and a secondary coil electromagnetically connected to the primary coil, and the feeding device comprising:
• two internal power supply wires respectively connected to the power supply wires of the charging cable;
• a filter circuit connected to and between the two internal power supply wires;
• and
• an electromagnetic guidance type signal converter comprising a primary coil provided in one or both of the internal power supply wires, and a secondary coil electromagnetically connected to the primary coil, wherein
• a current loop circuit is formed by the two internal power supply wires and the filter circuit of the power line communication device, the two power supply wires of the charging cable, and the two internal power supply wires and the filter circuit of the feeding device, and
• each of the power line communication device and the feeding device is configured to superpose a signal on the charging cable and extract a signal superposed on the charging cable by means of its signal converter.

A power line communication device in a vehicle which performs power line communication with an external device which is connected to the vehicle with a charging cable,

• the charging cable comprising two power supply wires,
• the power line communication device comprising:
• two internal power supply wires respectively connected to the power supply wires of the charging cable;
• a filter circuit connected to and between the two internal power supply wires;
• and
• an electromagnetic guidance type signal converter comprising a primary coil provided in one or both of the internal power supply wires, and a secondary coil electromagnetically connected to the primary coil, wherein
• superposition of a signal on the charging cable and extraction of a signal superposed on the charging cable are performed by means of the signal converter.

A connector device which includes a plurality of connection terminals, a connector body which houses the plurality of connection terminals, and a plurality of internal wires including two internal power supply wires and connected to the connection terminals, the connector device comprising:

• an annular magnetic body through which one of the internal power supply wires is inserted and the other of the internal power supply wires is not inserted;
• and
• a signal wire wound around the annular magnetic body, wherein
• an electromagnetic guidance type signal converter for power line communication is formed by the annular magnetic body, the one of the internal power supply wires, and the signal wire.