# US 9,437,362 B2 · Apparatus and method for wireless power reception > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,437,362 B2 - Document ID: US9437362B2 - Status: Granted - Kind: B2 - Application number: 13/927,181 - Filed: 2013-06-26 - Published: 2014-01-16 - Granted: 2016-09-06 - Earliest claimed: 2012-07-10 - Assignees: Samsung Electronics Co., Ltd.; Iucf-Hyu (Industry-University Cooperation Foundation Hanyang University) - Applicants: Samsung Electronics Co., Ltd.; Iucf-Hyu (Industry-University Cooperation Foundation Hanyang University) - Inventors: Dong Zo Kim; Sang Wook Kwon; Ki Young Kim; Nam Yun Kim; Seong Joong Kim; Yong Seong Roh; Young Jin Moon; Yun Kwon Park; Keum Su Song; Chang Sik Yoo; Chang Wook Yoon; Jin Sung Choi - Web page: https://patentgrep.com/patent/US9437362B2 ## CPC - H02J 50/20: using microwaves or radio frequency waves - H02J 7/42: with electronic devices having internal batteries, e.g. mobile phones - H02J 50/12: of the resonant type - 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 - H02J 50/005: {Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices} - H04B 5/24: Inductive coupling - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - H04B: TRANSMISSION ## Abstract An apparatus and a method for wireless power reception are provided. A wireless power receiver includes a receiving unit configured to wirelessly receive a power. The wireless power receiver further includes a power consuming unit configured to consume the power, until a voltage applied to a load reaches a predetermined value, so that an amount of a power transferred from the receiving unit to the load is less than or equal to an initial accommodation power amount of the load. ## Claims ### Claim 1 A wireless power receiver comprising: a receiving unit configured to wirelessly receive a power; a rectifier configured to rectify an alternating current (AC) signal of the power to a direct current (DC) signal; a power consumer configured to consume the power, until a voltage applied to a load reaches a predetermined value, so that an amount of a power transferred from the receiving unit to the load is less than or equal to an initial accommodation power amount of the load; and a controller configured to control an operation of the power consumer based on a magnitude of the DC signal, wherein the initial accommodation power amount is determined based on a value of a current that may be accommodated in the load when charging of the load is started. ### Claim 2 (depends on 1) The wireless power receiver of claim 1, wherein the controller is further configured to: control the power consumer to be operated when the magnitude of the DC signal is less than a predetermined value; and control the operation of the power consumer to be suspended when the magnitude of the DC signal is greater than or equal to the predetermined value. ### Claim 3 (depends on 1) The wireless power receiver of claim 1, wherein the controller comprises: a current detector configured to detect a current of the DC signal; and a comparator configured to compare the current with a predetermined current, output a high signal when the current is less than the predetermined current to control the power consumer to be operated, and output a low signal when the current is greater than or equal to the predetermined current to control an operation of the power consumer to be suspended. ### Claim 4 (depends on 1) The wireless power receiver of claim 1, wherein the power consumer comprises: a power dump resistor comprising a resistance that is in inverse proportion to the initial accommodation power amount; and a switch configured to enable the power dump resistor to be operated or suspended. ### Claim 5 (depends on 1) The wireless power receiver of claim 1, further comprising: a rectifier configured to rectify an alternating current (AC) signal of the power to a direct current (DC) signal; and a DC-to-DC (DC/DC) converter configured to convert a magnitude of the DC signal to a magnitude required by the load. ### Claim 6 (depends on 5) The wireless power receiver of claim 5, wherein the DC/DC converter comprises: a voltage measuring unit configured to measure a voltage applied to an on-resistor of a transistor connected in series to the rectifier; an amplifier configured to amplify the measured voltage; and a comparator configured to compare the amplified voltage with a predetermined voltage, output a high signal when the amplified voltage is less than the predetermined voltage to control the power consumer to be operated, and output a low signal when the amplified voltage is greater than or equal to the predetermined voltage to control an operation of the power consumer to be suspended. ### Claim 7 (depends on 5) The wireless power receiver of claim 5, wherein the DC/DC converter comprises: a switch controller configured to control an operation switch of the power consumer based on a magnitude of a voltage applied to a capacitor when the receiving unit receives the power. ### Claim 8 (depends on 7) The wireless power receiver of claim 7, wherein the switch controller is further configured to: power on the operation switch to control the power consumer to be operated when the magnitude of the voltage applied to the capacitor is less than or equal to a predetermined value; and power off the operation switch to control the operation of the power consumer to be suspended when the magnitude of the voltage applied to the capacitor is greater than the predetermined value. ### Claim 9 (depends on 7) The wireless power receiver of claim 7, wherein the switch controller comprises: a power supply configured to supply an amount of a current to the capacitor when the receiving unit receives the power; and a capacitor configured to store the current. ### Claim 10 (depends on 1) The wireless power receiver of claim 1, further comprising: a rectifier configured to rectify an alternating current (AC) signal of the power to a direct current (DC) signal; a controller configured to control an operation of the power consumer based on a magnitude of the DC signal; and an interrupting unit configured to interrupt an electrical connection between the rectifier and the load based on the magnitude of the DC signal. ### Claim 11 (depends on 10) The wireless power receiver of claim 10, wherein the interrupting unit is further configured to: interrupt the electrical connection when the magnitude of the DC signal is greater than a magnitude of a voltage that is allowed in the load. ### Claim 12 A wireless power reception method comprising: wirelessly receiving a power; rectifying an alternating current (AC) signal of the power to a direct current (DC) signal; consuming the power, until a voltage applied to a load reaches a predetermined value, so that an amount of a power transferred from a receiving unit to the load is less than or equal to an initial accommodation power amount of the load; and controlling the consuming of the power based on a magnitude of the DC signal, wherein the initial accommodation power amount is determined based on a value of a current that may be accommodated in the load when charging of the load is started. ### Claim 13 (depends on 12) The wireless power reception method of claim 12, further comprising: consuming the power when the magnitude of the DC signal is less than a predetermined value; and suspending the consuming of the power when the magnitude of the DC signal is greater than or equal to the predetermined value. ### Claim 14 (depends on 12) The wireless power reception method of claim 12, further comprising: detecting a current of the DC signal; comparing the current with a predetermined current; consuming the power when the current is less than the predetermined current; and suspending the consuming of the power when the current is greater than or equal to the predetermined current. ### Claim 15 (depends on 12) The wireless power reception method of claim 12, further comprising: rectifying, by a rectifier, an alternating current (AC) signal of the power to a direct current (DC) signal; and converting a magnitude of the DC signal to a magnitude required by the load. ### Claim 16 (depends on 15) The wireless power reception method of claim 15, further comprising: measuring a voltage applied to an on-resistor of a transistor connected in series to the rectifier; amplifying the measured voltage; comparing the amplified voltage with a predetermined voltage; consuming the power when the amplified voltage is less than the predetermined voltage; and suspending the consuming of the power when the amplified voltage is greater than or equal to the predetermined voltage. ### Claim 17 (depends on 12) The wireless power reception method of claim 12, further comprising: controlling the consuming of the power based on a magnitude of a voltage applied to a capacitor when the power is received. ### Claim 18 (depends on 12) The wireless power reception method of claim 12, further comprising: rectifying, by a rectifier, an alternating current (AC) signal of the power to a direct current (DC) signal; controlling the consuming of the power based on a magnitude of the DC signal; and interrupting an electrical connection between the rectifier and the load based on the magnitude of the DC signal. ### Claim 19 (depends on 1) The wireless power receiver of claim 1, wherein the predetermined value is corresponding to a value of the voltage measured when the charging of the load is started in a constant current (CC) mode. ### Claim 20 (depends on 12) The wireless power reception method of claim 12, wherein the predetermined value is corresponding to a value of the voltage measured when the charging of the load is started in a constant current (CC) mode.