# US 11,909,252 B2 · Wireless power transfer for a photovoltaic power source > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,909,252 B2 - Document ID: US11909252B2 - Status: Granted - Kind: B2 - Application number: 18/096,635 - Filed: 2023-01-13 - Published: 2023-05-18 - Granted: 2024-02-20 - Earliest claimed: 2020-12-10 - Assignees: Powermat Technologies Ltd. - Applicants: Powermat Technologies Ltd. - Inventors: Itay Sherman; Elieser Mach; Neri Naveh - Web page: https://patentgrep.com/patent/US11909252B2 ## CPC - H02J 7/35: with light sensitive cells - H02J 50/12: of the resonant type - G05F 1/67: to the maximum power available from a generator, e.g. from solar cell - H02J 3/381: {Dispersed generators} - H02J 7/04: Regulation of charging current or voltage - H02J 50/10: using inductive coupling - H02J 50/80: involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices - H02J 2101/25: {involving maximum power point tracking control for photovoltaic sources} - Y02E 10/56: Power conversion systems, e.g. maximum power point trackers - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - G05F: SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A wireless photovoltaic power system is provided. The wireless photovoltaic power system includes photovoltaic cell units that provide power. Each of the photovoltaic cell units include a photovoltaic cell. The wireless photovoltaic power system includes a first wireless power device that receives the power. The first wireless power device includes a coil that provides a magnetic field to wirelessly transfer the power to a second wireless power device. The first wireless power device provides a combinational implementation of a maximum power point tracking of the photovoltaic cell units and a power control of a load. ## Claims ### Claim 1 A wireless photovoltaic power system comprising: at least one photovoltaic cell unit providing power; and a first wireless power device comprising a controller, a driver, and a coil connected to the at least one photovoltaic cell unit, the controller causing the driver to generate electromagnetic energy in a magnetic field of the coil based on the power and to wirelessly transfer the power to a second wireless power device, and the first wireless power device switching between burst operations and continuous operations as directed by the controller to generate the electromagnetic energy. ### Claim 2 (depends on 1) The wireless photovoltaic power system of claim 1, wherein the first wireless power device switches between burst operations and continuous operations based on a state of the at least one photovoltaic cell unit. ### Claim 3 (depends on 1) The wireless photovoltaic power system of claim 1, wherein a state of the at least one photovoltaic cell unit comprises a maximal power currently achievable by at least one photovoltaic cell of the at least one photovoltaic cell unit. ### Claim 4 (depends on 1) The wireless photovoltaic power system of claim 1, wherein the first wireless power device switches between burst operations and continuous operations based on a state of the at least one photovoltaic cell unit or a state of the second wireless power device. ### Claim 5 (depends on 4) The wireless photovoltaic power system of claim 4, wherein the state of the second wireless power device comprises a maximal power currently achievable by a load level or a charging phase of the second wireless power device. ### Claim 6 (depends on 1) The wireless photovoltaic power system of claim 1, wherein the first wireless power device providing a maximum power point tracking of the at least one photovoltaic cell unit and a power control of a load. ### Claim 7 (depends on 1) The wireless photovoltaic power system of claim 1, wherein the first wireless power device receives a request from the second wireless power device to initiate burst operations. ### Claim 8 (depends on 1) The wireless photovoltaic power system of claim 1, wherein the at least one photovoltaic cell unit comprises at least one photovoltaic cell and a capacitor that takes power generated by the at least one photovoltaic cell from different time periods to provide the power to the coil. ### Claim 9 (depends on 1) The wireless photovoltaic power system of claim 1, wherein the first wireless power device comprises a switch that directly couples the at least one photovoltaic cell unit to a power consuming device. ### Claim 10 (depends on 1) The wireless photovoltaic power system of claim 1, wherein the first wireless power device is configured to operate in a receiver mode. ### Claim 11 A wireless photovoltaic power system comprising: at least one photovoltaic cell unit providing power; and a first wireless power device comprising a controller, a driver, and a coil connected to the at least one photovoltaic cell unit, the controller causing the driver to generate electromagnetic energy in a magnetic field of the coil based on the power and to wirelessly transfer the power to a second wireless power device, and the controller causing a maximum power point tracking operation of the at least one photovoltaic cell unit. ### Claim 12 (depends on 11) The wireless photovoltaic power system of claim 11, wherein the maximum power point tracking operation comprises switching a direction of control by the controller to identify a maximal power point. ### Claim 13 (depends on 11) The wireless photovoltaic power system of claim 11, wherein the second wireless power device operates to control battery charging at a constant current constant voltage algorithm and to enable the maximum power point tracking operation of the at least one photovoltaic cell unit. ### Claim 14 (depends on 11) The wireless photovoltaic power system of claim 11, wherein the first wireless power device switches between burst operations and continuous operations as directed by the controller to generate the electromagnetic energy. ### Claim 15 (depends on 14) The wireless photovoltaic power system of claim 14, wherein the first wireless power device switches between the burst and continuous operations based on a power state of the at least one photovoltaic cell unit or second wireless power device to improve a transfer efficiency of the power. ### Claim 16 (depends on 14) The wireless photovoltaic power system of claim 14, wherein an initiation of a burst operation by the second wireless power device causes a request that defines a length or number of bursts. ### Claim 17 (depends on 14) The wireless photovoltaic power system of claim 14, wherein the burst and continuous operations are maintained with the maximum power point tracking operation.