# US 2010/0164297 A1 · Wireless energy transfer using conducting surfaces to shape fields and reduce loss > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2010/0164297 A1 - Document ID: US20100164297A1 - Status: Published application - Kind: A1 - Application number: 12/647,916 - Filed: 2009-12-28 - Published: 2010-07-01 - Earliest claimed: 2008-09-27 - Assignees: WiTricity Corporation - Inventors: Andre B. Kurs; Andrew J. Campanella; Konrad J. Kulikowski; Katherine L. Hall; Marin Soljacic; Morris P. Kesler; Aristeidis Karalis - Web page: https://patentgrep.com/patent/US20100164297A1 ## CPC - H01Q 1/248: {provided with an AC/DC converting device, e.g. rectennas} - H01Q 7/005: {with variable reactance for tuning the antenna} - H02J 7/94: in response to battery current - H02J 7/96: in response to battery voltage - H02J 50/12: of the resonant type - H02J 50/402: {the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas} - H02J 50/70: involving the reduction of electric, magnetic or electromagnetic leakage fields - 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 - H03H 7/40: Automatic matching of load impedance to source impedance - H04B 5/79: for data transfer in combination with power transfer - B60L 2200/26: Rail vehicles - H02J 7/00: Circuit arrangements for charging or discharging batteries or for supplying loads from batteries - H02J 7/04: Regulation of charging current or voltage - H02J 50/60: responsive to the presence of foreign objects, e.g. detection of living beings - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) - 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 - B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES ## Abstract In embodiments of the present invention improved capabilities are described for a method and system comprising a source resonator optionally coupled to an energy source and a second resonator located a distance from the source resonator, where the source resonator and the second resonator are coupled to provide near-field wireless energy transfer among the source resonator and the second resonator and where the field of at least one of the source resonator and the second resonator is shaped using a conducting surface to avoid a loss-inducing object. ## Claims ### Claim 1 A system, comprising: a source resonator optionally coupled to an energy source; and a second resonator located a distance from the source resonator, wherein the source resonator and the second resonator are coupled to provide near-field wireless energy transfer among the source resonator and the second resonator and wherein the field of at least one of the source resonator and the second resonator is shaped using a conducting surface to avoid a loss-inducing object. ### Claim 2 (depends on 1) The system of claim 1, wherein at least one of the source resonator and the second resonator have a quality factor, Q>100. ### Claim 3 (depends on 1) The system of claim 1, wherein the source resonator Q is greater than 100 and the second resonator Q is greater than 100. ### Claim 4 (depends on 1) The system of claim 1, wherein the square root of the source resonator Q times the second resonator Q is greater than 100. ### Claim 5 (depends on 1) The system of claim 1, comprising more than one source resonator. ### Claim 6 (depends on 1) The system of claim 1, comprising more than one second resonator. ### Claim 7 (depends on 1) The system of claim 1, comprising more than three resonators. ### Claim 8 A method, comprising: providing a source resonator optionally coupled to an energy source and a second resonator located a distance from the source resonator, wherein the source resonator and the second resonator are coupled to provide near-field wireless energy transfer among the source resonator and the second resonator and wherein the field of at least one of the source resonator and the second resonator is shaped using a conducting surface to avoid a loss-inducing object. ### Claim 9 (depends on 8) The method of claim 8, wherein at least one of the source resonator and the second resonator have a quality factor, Q>100. ### Claim 10 (depends on 8) The method of claim 8, wherein the source resonator Q is greater than 100 and the second resonator Q is greater than 100. ### Claim 11 (depends on 8) The method of claim 8, wherein the square root of the source resonator Q times the second resonator Q is greater than 100. ### Claim 12 (depends on 8) The method of claim 8, comprising more than one source resonator. ### Claim 13 (depends on 8) The method of claim 8, comprising more than one second resonator. ### Claim 14 (depends on 8) The method of claim 8, comprising more than three resonators.