# US 2022/0285992 A1 · Power feeding device and power feeding system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2022/0285992 A1 - Document ID: US20220285992A1 - Status: Published application - Kind: A1 - Application number: 17/683,536 - Filed: 2022-03-01 - Published: 2022-09-08 - Earliest claimed: 2021-03-03 - Assignees: IHI Corporation; Incorporated Educational Institution Tohoku Gakuin - Applicants: IHI Corporation; Incorporated Educational Institution Tohoku Gakuin - Inventors: Kentaro FURIYA; Kenji NISHIMURA; Motonao NIIZUMA; Fumihiro SATO; Tomohiro SAWA - Web page: https://patentgrep.com/patent/US20220285992A1 ## CPC - H02J 50/12: of the resonant type - B60L 53/12: Inductive energy transfer - H01F 38/14: Inductive couplings - 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} - 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 50/90: involving detection or optimisation of position, e.g. alignment - B60L 2200/10: Air crafts - H02J 2105/32: {for aircrafts} - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - Y02T 10/7072: Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors - Y02T 90/14: Plug-in electric vehicles - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - 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 - H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A power feeding device performing wireless power feeding to a flying object includes: a power feeding unit performing power feeding to the flying object disposed at a power feeding position; a power transmission coil provided in the power feeding unit and generating a magnetic field by energization; a relay coil provided in the power feeding unit, receiving the magnetic field generated from the power transmission coil and magnetically coupled to the power transmission coil, and magnetically coupled to a power receiving coil provided in the flying object in a case where the flying object is positioned at the power feeding position; and a second magnetic body provided in the power feeding unit and used for magnetic coupling between the relay coil and the power receiving coil. ## Claims ### Claim 1 A power feeding device performing wireless power feeding to a power feeding target, the power feeding device comprising: a power feeding unit performing power feeding to the power feeding target disposed at a power feeding position; a power transmission coil provided in the power feeding unit and generating a magnetic field by energization; a relay coil provided in the power feeding unit, receiving the magnetic field generated from the power transmission coil and magnetically coupled to the power transmission coil, and magnetically coupled to a power receiving coil provided in the power feeding target in a case where the power feeding target is positioned at the power feeding position; and a magnetic body provided in the power feeding unit and used for magnetic coupling between the relay coil and the power receiving coil. ### Claim 2 (depends on 1) The power feeding device according to claim 1, wherein the power receiving coil is formed smaller than the relay coil and is disposed on an inner peripheral side of the relay coil in a case where the power feeding target is positioned at the power feeding position. ### Claim 3 (depends on 1) The power feeding device according to claim 1, wherein the power transmission coil and the relay coil are provided coaxially and the power receiving coil, the power transmission coil, and the relay coil are coaxially disposed in a case where the power feeding target is positioned at the power feeding position. ### Claim 4 (depends on 1) The power feeding device according to claim 1, wherein the power feeding target is a flying object. ### Claim 5 A power feeding system performing wireless power feeding to a power feeding target, the power feeding system comprising: a power receiving coil provided in the power feeding target; a power feeding unit performing power feeding to the power feeding target disposed at a power feeding position; a power transmission coil provided in the power feeding unit and generating a magnetic field by energization; a relay coil provided in the power feeding unit, receiving the magnetic field generated from the power transmission coil and magnetically coupled to the power transmission coil, and magnetically coupled to the power receiving coil in a case where the power feeding target is positioned at the power feeding position; and a magnetic body provided in the power feeding unit and used for magnetic coupling between the relay coil and the power receiving coil. ### Claim 6 (depends on 1) The power feeding device according to claim 1 wherein the power feeding unit includes a guide to guide the power feeding target to the power feeding position. ### Claim 7 (depends on 6) The power feeding device according to claim 6, wherein the power feeding unit comprises a housing to contain the power transmission coil, the relay coil, and the magnetic body, the housing includes a main surface where the power supply target is to be disposed, the main surface includes a recessed portion, and a bottom surface of the recessed portion includes the power feeding position. ### Claim 8 (depends on 7) The power feeding device according to claim 7, wherein the recessed portion is surrounded by a side wall, and the side wall includes an inclined surface inclined such that a horizontal cross-sectional area of the recessed portion is smaller toward the bottom surface.