# US 2014/0152117 A1 · Wireless Power System With A Self-regulating Wireless Power Receiver > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0152117 A1 - Document ID: US20140152117A1 - Status: Published application - Kind: A1 - Application number: 14/094,750 - Filed: 2013-12-02 - Published: 2014-06-05 - Earliest claimed: 2012-12-03 - Assignees: Wipqtus Inc. - Applicants: WIPQTUS Inc. - Inventors: Ganapathy Sankar - Web page: https://patentgrep.com/patent/US20140152117A1 ## CPC - H02J 50/12: of the resonant type - H03H 7/40: Automatic matching of load impedance to source impedance - H04B 5/26: using coils - H04B 5/266: {One coil at each side, e.g. with primary and secondary coils} - H04B 5/79: for data transfer in combination with power transfer - H02J 7/47: Arrangements for checking compatibility or authentication between one component, e.g. a battery or a battery charger, and another component, e.g. a power source - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - H03H: IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS (waveguides, resonators, lines or other devices of the waveguide type H01P) - H04B: TRANSMISSION ## Abstract A method and a system for self-regulating wireless power transmitted to a wireless power receiver (WPR) are provided. An auto-tuning network is operably coupled within the WPR. The auto-tuning network includes an impedance network that dynamically increases, decreases, or maintains an amount of the received wirelessly transmitted power by detecting changes in a rectifier load disposed in the WPR and/or in a rectifier output voltage in the WPR. The auto-tuning network self-regulates the wireless power received from a wireless power transmitter (WPT) obviating the need for conventional communication messages. The WPT is hence free from a modulator/demodulator block and an out-of-band communication block and operates over a limited operating range to enable a simpler design for passing electromagnetic compliance regulations. The WPR implements a receiver-maximum-power-signature algorithm for enabling the WPT to detect unsupported receivers, configure its operating point and range, and terminate power transmission when not needed by the WPR. ## Claims ### Claim 1 A wireless power system, comprising: a self-regulating wireless power receiver configured to receive wirelessly transmitted power; and an auto-tuning network operably coupled within said self-regulating wireless power receiver, said auto-tuning network configured to control and regulate said received wirelessly transmitted power. ### Claim 2 (depends on 1) The wireless power system of claim 1, wherein said auto-tuning network comprises an impedance network dynamically configured to one of increase, decrease, and maintain an amount of said received wirelessly transmitted power. ### Claim 3 (depends on 2) The wireless power system of claim 2, wherein said impedance network comprises one or more of passive electronic components, active electronic components, and electronic switches. ### Claim 4 (depends on 1) The wireless power system of claim 1, wherein said auto-tuning network is configured to detect changes in one or more of a load of a rectifier operably disposed in said self-regulating wireless power receiver, and an output voltage of said rectifier, and to counteract said detected changes if said detected changes exceed a safe operating range. ### Claim 5 (depends on 1) The wireless power system of claim 1, wherein said self-regulating wireless power receiver is configured to implement a receiver-maximum-power-signature algorithm for enabling a wireless power transmitter to detect unsupported receivers and terminate transmission of wireless power, wherein said receiver-maximum-power-signature algorithm defines instructions for varying input impedance of said self-regulating wireless power receiver by a predefined amount for predetermined intervals of time, and wherein said input impedance of said self-regulating wireless power receiver is varied via impedance changes in said auto-tuning network of said self-regulating wireless power receiver. ### Claim 6 (depends on 5) The wireless power system of claim 5, further comprising a wireless power transmitter that is aware of maximum power needs of said self-regulating wireless power receiver via said receiver-maximum-power-signature algorithm, wherein said wireless power transmitter configures its operating point and range to transmit a required level of maximum wireless power to said self-regulating wireless power receiver based on a received maximum-power-signature and an estimated level of magnetic field flux coupling between said wireless power transmitter and said self-regulating wireless power receiver. ### Claim 7 (depends on 6) The wireless power system of claim 6, wherein said wireless power transmitter, via said receiver-maximum-power-signature algorithm, terminates said transmission of said wireless power to said self-regulating wireless power receiver when said self-regulating wireless power receiver does not need any further said wireless power. ### Claim 8 (depends on 1) The wireless power system of claim 1, further comprising a wireless power transmitter free from a modulator/demodulator block and an out-of-band communication block configured to communicate conventional wireless power protocol messages to and from said self-regulating wireless power receiver, wherein said self-regulating wireless power receiver, via said auto-tuning network, is configured to regulate said wirelessly transmitted power from said wireless power transmitter without said communication of said conventional wireless power protocol messages to and from said modulator/demodulator block and said out-of-band communication block. ### Claim 9 (depends on 1) The wireless power system of claim 1, wherein said self-regulating wireless power receiver, via said auto-tuning network, is configured to receive said wirelessly transmitted power from a wireless power transmitter without establishing a conventional communication protocol with said wireless power transmitter. ### Claim 10 A method for self regulating wireless power transmitted to a wireless power receiver, comprising: providing a self-regulating wireless power receiver comprising an auto-tuning network; configuring a self-regulating wireless power receiver to receive wirelessly transmitted power; operably coupling said auto-tuning network within said self-regulating wireless power receiver; and configuring said auto-tuning network to control and regulate said received wirelessly transmitted power. ### Claim 11 (depends on 10) The method of claim 10, wherein said auto-tuning network comprises an impedance network dynamically configured to one of increase, decrease, and maintain an amount of said received wirelessly transmitted power. ### Claim 12 (depends on 11) The method of claim 11, wherein said impedance network comprises one or more of passive electronic components, active electronic components, and electronic switches. ### Claim 13 (depends on 10) The method of claim 10, further comprising detecting changes in one or more of a load of a rectifier operably disposed in said self-regulating wireless power receiver, and an output voltage of said rectifier by said auto-tuning network to counteract said detected changes if said detected changes exceed a safe operating range. ### Claim 14 (depends on 10) The method of claim 10, further comprising implementing a receiver-maximum-power-signature algorithm by said self-regulating wireless power receiver for enabling a wireless power transmitter to detect unsupported receivers, configure its operating point to transmit a required level of maximum wireless power to said self-regulating wireless power receiver, and terminate transmission of said wireless power to said self-regulating wireless power receiver when said self-regulating wireless power receiver does not need any further said wireless power, wherein said receiver-maximum-power-signature algorithm defines instructions for varying input impedance of said self-regulating wireless power receiver by a predefined amount for predetermined intervals of time, and wherein said input impedance of said self-regulating wireless power receiver is varied via impedance changes in said auto-tuning network of said self-regulating wireless power receiver. ### Claim 15 (depends on 10) The method of claim 10, wherein said self-regulating wireless power receiver, via said auto-tuning network, is configured to regulate said wirelessly transmitted power from a wireless power transmitter free from a modulator/demodulator block and an out-of-band communication block that is used for communication of conventional wireless power protocol messages. ### Claim 16 (depends on 10) The method of claim 10, wherein said self-regulating wireless power receiver, via said auto-tuning network, is configured to receive said wirelessly transmitted power from a wireless power transmitter without establishing a conventional communication protocol with said wireless power transmitter.