# US 10,766,373 B2 · Power-feeding device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,766,373 B2 - Document ID: US10766373B2 - Status: Granted - Kind: B2 - Application number: 16/456,911 - Filed: 2019-06-28 - Published: 2019-10-17 - Granted: 2020-09-08 - Earliest claimed: 2013-03-22 - Assignees: Panasonic Intellectual Property Management Co., Ltd. - Applicants: Panasonic Intellectual Property Management Co., Ltd. - Inventors: Tsuyoshi Nishio; Osamu Ohashi; Noriaki Asaoka; Masayoshi Koizumi - Web page: https://patentgrep.com/patent/US10766373B2 ## CPC - B60L 53/122: Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil - B60L 53/38: specially adapted for charging by inductive energy transfer - H02J 7/42: with electronic devices having internal batteries, e.g. mobile phones - 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 50/90: involving detection or optimisation of position, e.g. alignment - 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 90/12: Electric charging stations - Y02T 90/14: Plug-in electric vehicles - 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 - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract To minimize excessively high output or increases in magnetic-flux leakage by controlling power feeding on the power-feeding side if an unforeseen situation occurs. This power-feeding device (100) feeds power to an external power-receiving device (150) in a contactless manner. A power-feeding coil (103) uses electromagnetic power to feed electrical power to a power-receiving coil (154) in the power-receiving device (150). While power is being fed from said power-feeding coil (103), a power-feeding-side control unit (107) determines the amount of displacement of the power-feeding coil (103) and, on the basis of the determined displacement amount, controls the amount of electrical power being fed. ## Claims ### Claim 1 A power supply apparatus comprising: a power supply coil that supplies power to a power receiving coil of a power receiving section in a wireless manner using an electromagnetic force; a controller that controls an amount of power supply that changes a magnetic coupling between the power supply coil and the power receiving coil based on an amount of displacement of a positional change of the power supply coil with respect to the power receiving coil when power is supplied from the power supply coil; and a detection section that detects the displacement of the positional change of the power supply coil, wherein the controller calculates the amount of displacement from an accumulation of the displacement of the positional change of the power supply coil detected by the detection section for a predetermined time, and when the amount of displacement during power supplying from the power supply coil is equal to or greater than a threshold, the controller reduces the amount of power supply to a lower amount than a case where the amount of displacement during power supplying from the power supply coil is lower than the threshold. ### Claim 2 (depends on 1) The power supply apparatus according to claim 1, wherein the controller is an acceleration sensor. ### Claim 3 (depends on 1) The power supply apparatus according to claim 1, wherein the controller is an angular velocity sensor. ### Claim 4 (depends on 1) The power supply apparatus according to claim 1, wherein the displacement of the positional change of the power supply coil occurs by an earthquake. ### Claim 5 (depends on 1) The power supply apparatus according to claim 1, wherein the power supply apparatus is installed on a ground. ### Claim 6 (depends on 1) A wireless power supply system that comprises: the power supply apparatus of claim 1; and a power receiving apparatus that comprises the power receiving section. ### Claim 7 (depends on 6) The wireless power supply system according to claim 6, wherein the power supply coil is mounted on a vehicle.