# US 10,312,696 B2 · Method and apparatus for transmitting wireless power > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,312,696 B2 - Document ID: US10312696B2 - Status: Granted - Kind: B2 - Application number: 15/707,434 - Filed: 2017-09-18 - Published: 2018-01-04 - Granted: 2019-06-04 - Earliest claimed: 2011-12-15 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Kyung-Woo Lee; Kang-Ho Byun; Se-Ho Park - Web page: https://patentgrep.com/patent/US10312696B2 ## CPC - H02J 7/42: with electronic devices having internal batteries, e.g. mobile phones - H02J 7/731: {specially adapted for holding portable devices containing batteries (H02J7/751 takes precedence)} - H02J 50/10: using inductive coupling - H02J 50/12: of the resonant type - H02J 50/40: using two or more transmitting or receiving devices (H02J50/50 takes precedence) - H02J 50/60: responsive to the presence of foreign objects, e.g. detection of living beings - H02J 50/80: involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices - H02J 50/90: involving detection or optimisation of position, e.g. alignment - H04B 5/79: for data transfer in combination with power transfer - H04W 52/0225: {using monitoring of external events, e.g. the presence of a signal} - H04W 52/0229: {where the received signal is a wanted signal} - H04W 52/0245: {according to signal strength} - Y02D 30/70: in wireless communication networks - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - H04B: TRANSMISSION - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE ## Abstract A method and apparatus are provided for controlling wireless power in a wireless power network managed by a wireless power transmitter. The control method includes registering a wireless power receiver to a wireless power network corresponding to the wireless power transmitter; applying a charging power for charging the wireless power receiver to a resonator of the wireless power transmitter; detecting a change of magnitude of power applied to the resonator; detecting that a communication unit of the wireless power transmitter fails to receive a communication signal from the wireless power receiver a predetermined time; and in response to detecting the change of the magnitude of power applied to the resonator and that the communication unit fails to receive the communication signal from the wireless power receiver in the predetermined time, removing the wireless power receiver from the wireless power network. ## Claims ### Claim 1 A wireless power transmitter, comprising: a resonator; a communication unit; and a processor configured to: register a wireless power receiver to a wireless power network corresponding to the wireless power transmitter, control such that a charging power for charging the wireless power receiver is applied to the resonator, detect a change of magnitude of power applied to the resonator, detect that the communication unit fails to receive a communication signal from the wireless power receiver in a predetermined time, and in response to detecting the change of the magnitude of the power applied to the resonator and that the communication unit fails to receive the communication signal from the wireless power receiver in the predetermined time, remove the wireless power receiver from the wireless power network. ### Claim 2 (depends on 1) The wireless power transmitter of claim 1, wherein the processor is further configured to control such that a detecting power for detecting another load change caused by a placement of an object is applied to the resonator, when no wireless power receivers remain registered to the wireless power network, after removing the wireless power receiver from the wireless power network. ### Claim 3 (depends on 1) The wireless power transmitter of claim 1, wherein the processor is further configured to adjust an amount of the charging power applied to the resonator, in response to removing the wireless power receiver from the wireless power network. ### Claim 4 A control method of a wireless power transmitter, the control method comprising: registering a wireless power receiver to a wireless power network corresponding to the wireless power transmitter; applying a charging power for charging the wireless power receiver to a resonator of the wireless power transmitter; detecting a change of magnitude of power applied to the resonator; detecting that a communication unit of the wireless power transmitter fails to receive a communication signal from the wireless power receiver a predetermined time; and in response to detecting the change of the magnitude of power applied to the resonator and that the communication unit fails to receive the communication signal from the wireless power receiver in the predetermined time, removing the wireless power receiver from the wireless power network. ### Claim 5 (depends on 4) The control method of claim 4, further comprising applying, to the resonator, a detecting power for detecting another load change caused by a placement of an object, when no wireless power receivers remain registered to the wireless power network, after removing the wireless power receiver from the wireless power network. ### Claim 6 (depends on 4) The control method of claim 4, further comprising adjusting an amount of the charging power applied to the resonator, in response to removing the wireless power receiver from the wireless power network.