# US 2013/0154348 A1 · Power feeding system and method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0154348 A1 - Document ID: US20130154348A1 - Status: Published application - Kind: A1 - Application number: 13/817,950 - Filed: 2011-08-04 - Published: 2013-06-20 - Earliest claimed: 2010-08-23 - Assignees: NEC Magnus Communications, Ltd.; NEC Corporation - Inventors: Hiroo Hongo; Masaki Yasukawa - Web page: https://patentgrep.com/patent/US20130154348A1 ## CPC - H04B 3/54: Systems for transmission via power distribution lines - G08C 17/00: Arrangements for transmitting signals characterised by the use of a wireless electrical link - H02J 13/1313: {using pulsed signals} - G08C 2201/10: Power supply of remote control devices - Y02E 60/00: Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation - Y04S 40/00: Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them - Y04S 40/121: using the power network as support for the transmission - H04B: TRANSMISSION - G08C: TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS (fluid pressure transmitting systems F15B; mechanical means for transferring the output of a sensing member into a different variable G01D5/00; mechanical control systems G05G) - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION - Y04S: SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS ## Abstract A center device performing power feed control generates a control signal for controlling supply and suspension of power to a main load of a remote terminal and transmits the control signal by superimposing the control signal on the power to be supplied to the remote terminal. The remote terminal includes a power-receiving side unit, a switch that connects the power-receiving side unit with the main load when the switch is on and disconnects the power-receiving side unit from the main load when the switch is off, and a control signal receiver that receives the control signal superimposed on the power transmitted from the center device to turns the switch on or off in accordance with the control signal received at the control signal receiver. ## Claims ### Claim 1 A power feeding system comprising: a remote terminal including a power-receiving side unit that receives externally supplied power, a main load as a circuit or device that realizes the principal function thereof, and a switch that connects said power-receiving side unit with said main load when said switch is on and disconnects said power-receiving side unit from the main load when said switch is off; and, a center device including a power-sourcing side unit that performs power feed control to said remote terminal and a control signal transmitter that generates a control signal for controlling supply and suspension of power to said main load and for transmitting the control signal by superimposing the control signal on the power supplied from said power sourcing side unit to said remote terminal, and said remote terminal further including a control signal receiver that receives the control signal that is transmitted by being superimposed on the power supplied from said center device to turn said switch on or off in accordance with the control signal. ### Claim 2 (depends on 1) The power feeding system according to claim 1, wherein said power-sourcing side unit detects the load current flowing through said power-receiving side unit, and said center device further includes a controller for determining whether or not power is supplied to said main load, based on the load current value detected by said power-sourcing side unit. ### Claim 3 (depends on 2) The power feeding system according to claim 2, wherein said controller determines that said remote terminal is connected when the load current flowing to said control signal receiver is detected and determines that said remote terminal is disconnected when the load current is not detected. ### Claim 4 A power feeding method, wherein a center device including a power-sourcing side unit for performing power feed control to a remote terminal, generates a control signal for controlling supply and suspension of power to a main load as a circuit or device that realizes the principal function of said remote terminal and transmits the control signal by superimposing the control signal on the power supplied to said remote terminal; and said remote terminal includes a power-receiving side unit that receives externally supplied power, the main load, a switch that connects a power-receiving side unit with the main load when a switch is on and disconnects said power-receiving side unit from said main load when said switch is off, and a control signal receiver that receives the control signal that is transmitted by being superimposed on the power supplied from said center device, said switch is turned on or off in accordance with the control signal received at said control signal receiver. ### Claim 5 (depends on 4) The power feeding method according to claim 4, wherein said power-sourcing side unit detects the load current flowing through said power-receiving side unit, and said center device determines whether or not power is supplied to said main load, based on the load current value detected by said power-sourcing side unit. ### Claim 6 (depends on 5) The power feeding method according to claim 5, wherein said center device determines that said remote terminal is connected when the load current flowing to said control signal receiver is detected and determines that said remote terminal is disconnected when the load current is not detected. ### Claim 7 A center device includes: a power-feeding side device that performs power feed control to a remote terminal; and, a control signal transmitter that generates a control signal for controlling supply and suspension of power to a main load as a circuit or device that realizes the principal function of said remote terminal, and the control signal is transmitted by being superimposed on the power supplied from said power-sourcing side unit to said remote terminal. ### Claim 8 (depends on 7) The center device according to claim 7, wherein said power-sourcing side unit detects the load current flowing through said power-receiving side unit, and includes a controller for determining whether or not power is supplied to said main load, based on the load current value detected by said power-sourcing side unit. ### Claim 9 (depends on 8) The center device according to claim 8, wherein said controller determines that said remote terminal is connected when the load current flowing to said control signal receiver is detected and determines that said remote terminal is disconnected when the load current is not detected. ### Claim 10 A remote terminal being supplied with power from a center device, comprising: a power-receiving side unit that receives power supplied form said center device; a main load as a circuit or device that realizes the principal function thereof; a switch that connects the power-receiving side unit with said main load when said switch is on and disconnects said power-receiving device from said main load when said switch is off; and, a control signal receiver that receives the control signal that is transmitted by being superimposed on the power supplied from said center device to turn said switch on or off in accordance with the control signal.