# US 10,374,468 B2 · System and method for improved DC power line communication

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- Number: US 10,374,468 B2
- Document ID: US10374468B2
- Status: Granted
- Kind: B2
- Application number: 15/274,517
- Filed: 2016-09-23
- Published: 2017-03-30
- Granted: 2019-08-06
- Earliest claimed: 2015-09-26
- Assignees: Kollmorgen Corporation
- Applicants: Kollmorgen Corporation
- Inventors: George B. Yundt; Robert Pearce
- Web page: https://patentgrep.com/patent/US10374468B2

## CPC

- H02J 50/80: involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
- H01F 27/29: Terminals; Tapping arrangements {for signal inductances}
- H01F 38/14: Inductive couplings
- H02J 50/10: using inductive coupling
- H04B 3/548: {the power on the line being DC (arrangements for feeding power H04L12/10; extracting feeding power from signals H04L25/02)}
- H04L 12/10: Current supply arrangements
- H01F 2038/143: {for signals}
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H04B: TRANSMISSION
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

A device for communicating and providing power over a cable having at least two conductors comprises a first inductor having a primary and a secondary winding, a second inductor having a primary and a secondary winding, the primary winding of the second inductor being coupled at one end to the primary winding of the first inductor, each of the secondary windings of the first and second inductors being coupled to one of the at least two conductors in the cable. The device further includes a transceiver coupled to the primary windings of the first and second inductors, wherein the first inductor is coupled to local ground potential, in a manner that varies the potential of each of the said conductors symmetrically from an average potential.

## Claims

### Claim 1

A device for communicating over a cable having at least two power conductors, said device comprising:
a transceiver,
a first inductor having a primary and a secondary winding,
a second inductor having a primary and a secondary winding;
the primary winding of the first inductor being coupled in series to the primary winding of the second inductor,
said transceiver coupled to said series connected primary windings of the first and second inductors;
and the secondary winding of the first inductor being coupled between a reference voltage and a first conductor in the cable,
and the secondary winding of the second inductor being coupled between a power return and a second conductor in the cable;
wherein the first and second inductors provide magnetically coupled communication between the transceiver and the first and second conductors in the cable.

### Claim 2 (depends on 1)

The device according to claim 1, wherein the secondary windings of the first and second inductor provides DC power from the conductors of the cable.

### Claim 3 (depends on 1)

The device according to claim 1, wherein the secondary windings of the first and second inductors are also coupled to a DC voltage supply.

### Claim 4

A PLC communication system for communicating over a cable having at least two power conductors, comprising:
a master device comprising:
a transceiver,
a first inductor having a primary and a secondary winding,
a second inductor having a primary and a secondary winding;
the primary winding of the first inductor being coupled in series to the primary winding of the second inductor,
said transceiver coupled to said series connected primary windings of the first and second inductors;
and the secondary winding of the first inductor being coupled between a reference voltage and a first conductor in the cable,
and the secondary winding of the second inductor being coupled between a power return and a second conductor in the cable; and
a slave device comprising:
a transceiver,
a first inductor having a primary and a secondary winding,
a second inductor having a primary and a secondary winding;
the primary winding of the first inductor being coupled in series to the primary winding of the second inductor,
said transceiver coupled to said series connected primary windings of the first and second inductors;
and the secondary winding of the first inductor being coupled between a reference voltage and a first conductor in the cable,
and the secondary winding of the second inductor being coupled between a power regulator and a second conductor in the cable.

### Claim 5 (depends on 4)

The PLC communication system of claim 4, wherein the secondary winding of the second inductor of the master device is also coupled to a DC voltage supply.

### Claim 6 (depends on 4)

The PLC communication system of claim 4, wherein the second inductor of the slave device draws DC power from the cable.