# US 12,015,282 B2 · Wireless power transmitting device for wirelessly transmitting power, wireless power receiving device for wirelessly receiving power, and operation method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,015,282 B2 - Document ID: US12015282B2 - Status: Granted - Kind: B2 - Application number: 17/846,380 - Filed: 2022-06-22 - Published: 2023-03-02 - Granted: 2024-06-18 - Earliest claimed: 2021-08-30 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Mingi Song; Kyungmin Park; Changhak O - Web page: https://patentgrep.com/patent/US12015282B2 ## CPC - H04B 5/266: {One coil at each side, e.g. with primary and secondary coils} - H01F 38/14: Inductive couplings - H02J 50/10: using inductive coupling - 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 - H02M 3/335: using semiconductor devices only - H04B 5/48: Transceivers - H04B 5/79: for data transfer in combination with power transfer - H04L 27/04: Modulator circuits; Transmitter circuits - H04B: TRANSMISSION - H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - H02M: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF (transformers H01F; dynamo-electric converters H02K47/00; controlling transformers, reactors or choke coils, control or regulation of electric motors, generators or dynamo-electric converters H02P) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract According to an embodiment, a wireless power transmitting device may include a transmission coil, a DC/DC converter configured to output a driving voltage, an inverter configured to output AC power to the transmission coil, and a controller. The controller may be configured to output a first control signal for generating the AC power having a first frequency to the inverter, measure a demodulated voltage generated by demodulating a signal applied to the transmission coil, and output, to the inverter, a second control signal for generating the AC power having a second frequency different from the first frequency, based on a first peak-to-peak value identified in the demodulated voltage being a preset first value or more. The inverter may output the AC power having the second frequency to the transmission coil based on the second control signal. Other various embodiments are possible as well. ## Claims ### Claim 1 A wireless power transmitting device comprising: a transmission coil; a DC/DC converter configured to output a driving voltage; an inverter configured to output AC power to the transmission coil, using the driving voltage; at least one controller; and memory storing instructions that, when executed by the at least one controller, cause the wireless power transmitting device to: output a first control signal for generating the AC power having a first frequency to the inverter, so that the inverter outputs, to the transmission coil, the AC power having the first frequency based on the first control signal, identify voltage information of a demodulated signal generated by demodulating a signal applied to the transmission coil while the AC power having the first frequency is applied to the transmission coil, and output, to the inverter, a second control signal for generating the AC power having a second frequency different from the first frequency, instead of the first control signal, based on a first peak-to-peak value identified in the voltage information being a preset first value or more, and wherein the inverter outputs the AC power having the second frequency to the transmission coil based on the second control signal. ### Claim 2 (depends on 1) The wireless power transmitting device of claim 1, further comprising a demodulation circuit configured to perform demodulation on the signal applied to the transmission coil. ### Claim 3 (depends on 2) The wireless power transmitting device of claim 2, wherein the demodulation circuit is further configured to perform low-pass filtering on the demodulated signal. ### Claim 4 (depends on 1) The wireless power transmitting device of claim 1, wherein the instructions, when executed by the at least one controller, cause the wireless power transmitting device to, as at least part of outputting the second control signal: when a third frequency which is a frequency of the AC power before the first control signal is outputted is smaller than the first frequency: identify the second frequency to be larger than the first frequency, based on the first peak-to-peak value being less than a second peak-to-peak value identified while the AC power having the third frequency is applied to the transmission coil, and identify the second frequency to be smaller than the first frequency, based on the first peak-to-peak value being more than the second peak-to-peak value identified while the AC power having the third frequency is applied to the transmission coil. ### Claim 5 (depends on 1) The wireless power transmitting device of claim 1, wherein the instructions, when executed by the at least one controller, cause the wireless power transmitting device to, as at least part of outputting the second control signal: when a third frequency which is a frequency of the AC power before the first control signal is outputted is larger than the first frequency: identify the second frequency to be smaller than the first frequency, based on the first peak-to-peak value being less than a second peak-to-peak value identified while the AC power having the third frequency is applied to the transmission coil, and identify the second frequency to be larger than the first frequency, based on the first peak-to-peak value being more than the second peak-to-peak value identified while the AC power having the third frequency is applied to the transmission coil. ### Claim 6 (depends on 1) The wireless power transmitting device of claim 1, wherein the instructions, when executed by the at least one controller, cause the wireless power transmitting device to, as at least part of outputting the second control signal: identify the second frequency based on the first peak-to-peak value. ### Claim 7 (depends on 1) The wireless power transmitting device of claim 1, wherein the instructions, when executed by the at least one controller, cause the wireless power transmitting device to control the first peak-to-peak value so that the first peak-to-peak value is more than a predesignated second value. ### Claim 8 (depends on 1) The wireless power transmitting device of claim 1, wherein the instructions, when executed by the at least one controller, cause the wireless power transmitting device to, as at least part of outputting the second control signal: output, to the inverter, the second control signal for generating the AC power having the second frequency, based on detection of a trigger for a noise reduction operation. ### Claim 9 (depends on 1) The wireless power transmitting device of claim 1, wherein the instructions, when executed by the at least one controller, cause the wireless power transmitting device to control the DC/DC converter to adjust the driving voltage based on outputting, to the inverter, the second control signal for generating the AC power having the second frequency. ### Claim 10 (depends on 1) The wireless power transmitting device of claim 1, wherein the instructions, when executed by the at least one controller, cause the wireless power transmitting device to perform modulation to request a wireless power receiving device to change a load, based on the first peak-to-peak value being greater than the preset first value. ### Claim 11 A method for operating a wireless power transmitting device including a transmission coil, a DC/DC converter configured to output a driving voltage, and an inverter configured to output AC power to the transmission coil using the driving voltage, the method comprising: outputting a first control signal for generating the AC power having a first frequency to the inverter, so that the inverter outputs, to the transmission coil, the AC power having the first frequency based on the first control signal; identifying voltage information of a demodulated signal generated by demodulating a signal applied to the transmission coil while the AC power having the first frequency is applied to the transmission coil; and outputting to the inverter, a second control signal for generating the AC power having a second frequency different from the first frequency, instead of the first control signal, based on a first peak-to-peak value identified in the voltage information being a preset first value or more, wherein the inverter outputs the AC power having the second frequency to the transmission coil based on the second control signal. ### Claim 12 (depends on 11) The method of claim 11, wherein the wireless power transmitting device further comprises a demodulation circuit configured to perform demodulation on the signal, and wherein the method for operating the wireless power transmitting device further comprises generating, by the demodulation signal, the demodulated signal by demodulating the signal applied to the transmission coil. ### Claim 13 (depends on 12) The method of claim 12, further comprising performing, by the demodulation circuit, low-pass filtering on the demodulated signal. ### Claim 14 (depends on 11) The method of claim 11, wherein outputting the second control signal further comprises: when a third frequency which is a frequency of the AC power before the first control signal is outputted is smaller than the first frequency: identifying the second frequency to be larger than the first frequency, based on the first peak-to-peak value being less than a second peak-to-peak value identified while the AC power having the third frequency is applied to the transmission coil, and identifying the second frequency smaller to be than the first frequency, based on the first peak-to-peak value being more than the second peak-to-peak value identified while the AC power having the third frequency is applied to the transmission coil. ### Claim 15 (depends on 11) The method of claim 11, wherein outputting the second control signal further comprises: when a third frequency which is a frequency of the AC power before the first control signal is outputted is larger than the first frequency: identifying the second frequency to be smaller than the first frequency, based on the first peak-to-peak value being less than a second peak-to-peak value identified while the AC power having the third frequency is applied to the transmission coil, and identifying the second frequency to be larger than the first frequency, based on the first peak-to-peak value being more than the second peak-to-peak value identified while the AC power having the third frequency is applied to the transmission coil. ### Claim 16 (depends on 11) The method of claim 11, wherein outputting the second control signal further comprises: identifying the second frequency based on the first peak-to-peak value. ### Claim 17 (depends on 11) The method of claim 11, further comprising controlling the first peak-to-peak value so that the first peak-to-peak value is more than a predesignated second value. ### Claim 18 (depends on 11) The method of claim 11, wherein outputting the second control signal further comprises: outputting to the inverter, the second control signal for controlling at the second frequency, based on detection of a trigger for a noise reduction operation. ### Claim 19 (depends on 11) The method of claim 11, further comprising controlling the DC/DC converter to adjust the driving voltage, based on outputting, to the inverter, the second control signal for generating the AC power having the second frequency. ### Claim 20 (depends on 11) The method of claim 11, further comprising performing modulation to request a wireless power receiving device to change a load, based on the first peak-to-peak value being greater than the preset first value.