# US 2013/0154384 A1 · Contactless power receiving device, vehicle, contactless power transmitting device, and contactless power supply system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0154384 A1 - Document ID: US20130154384A1 - Status: Published application - Kind: A1 - Application number: 13/687,691 - Filed: 2012-11-28 - Published: 2013-06-20 - Earliest claimed: 2011-12-15 - Inventors: Koji NAKAMURA - Web page: https://patentgrep.com/patent/US20130154384A1 ## CPC - B60L 53/126: Methods for pairing a vehicle and a charging station, e.g. establishing a one-to-one relation between a wireless power transmitter and a wireless power receiver - H01F 38/14: Inductive couplings - H02J 7/825: {Detection of fully charged condition} - 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 50/80: 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 - H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES - 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 A contactless power receiving device includes: a power receiving unit contactlessly receiving electric power from a power transmitting unit of a power transmitting device; and an electric load device using the electric power received by the power receiving unit. The power receiving unit includes: a coil; a capacitor connected to the coil; and a selector device connected in parallel with the capacitor and configured to be switched between a connecting state in which the selector device electrically connects both ends of the capacitor and a disconnecting state in which the selector device electrically disconnects the both ends of the capacitor. ## Claims ### Claim 1 A contactless power receiving device comprising: a power receiving unit that contactlessly receives electric power from a power transmitting unit provided in a power transmitting device, and that includes: a first coil; a first capacitor that is connected to the first coil; and a first selector device that is connected in parallel with the first capacitor and that is configured to be switched between a connecting state in which the first selector device electrically connects both ends of the first capacitor and a disconnecting state in which the first selector device electrically disconnects the both ends of the first capacitor; and an electric load device that uses the electric power received by the power receiving unit. ### Claim 2 (depends on 1) The contactless power receiving device according to claim 1, wherein the power receiving unit receives electric power from the power transmitting unit in a state where the first selector device is set in the disconnecting state. ### Claim 3 (depends on 1) The contactless power receiving device according to claim 1, further comprising: a control unit that sets the first selector device in the disconnecting state when electric power is received from the power transmitting unit. ### Claim 4 (depends on 1) The contactless power receiving device according to claim 1, wherein the power receiving unit further includes: a second coil; a second capacitor that is connected to the second coil; and a second selector device that is connected in parallel with the second capacitor and that is configured to be switched between a connecting state in which the second selector device electrically connects both ends of the second capacitor and a disconnecting state in which the second selector device electrically disconnects the both ends of the second capacitor. ### Claim 5 (depends on 4) The contactless power receiving device according to claim 4, further comprising: a control unit that sets one of the first selector device and the second selector device, corresponding to one of the first coil and the second coil, which is used to receive electric power, in the disconnecting state. ### Claim 6 (depends on 5) The contactless power receiving device according to claim 5, wherein the control unit selects the one of the first coil and the second coil, which is used to receive electric power, on the basis of a position of the power transmitting unit and a position of the power receiving unit. ### Claim 7 (depends on 3) The contactless power receiving device according to claim 3, wherein the control unit sets one of the first selector device and the second selector device, corresponding to one of the first coil and the second coil, which is not used to receive electric power, in the connecting state. ### Claim 8 (depends on 1) The contactless power receiving device according to claim 1, wherein a difference between a natural frequency of the power transmitting unit and a natural frequency of the power receiving unit is smaller than or equal to ±10% of the natural frequency of one of the power transmitting unit and the power receiving unit. ### Claim 9 (depends on 1) The contactless power receiving device according to claim 1, wherein a coupling coefficient between the power transmitting unit and the power receiving unit is smaller than or equal to 0.1. ### Claim 10 (depends on 1) The contactless power receiving device according to claim 1, wherein: the power receiving unit receives electric power from the power transmitting unit through at least one of a magnetic field and an electric field; the magnetic field is formed between the power receiving unit and the power transmitting unit and oscillates at a specific frequency; and the electric field is formed between the power receiving unit and the power transmitting unit and oscillates at the specific frequency. ### Claim 11 (depends on 1) The contactless power receiving device according to claim 1, wherein: the power receiving unit further includes: a third capacitor that is connected in series with the first capacitor; and a third selector device that is connected in parallel with the third capacitor and that is configured to be switched between a connecting state in which the third selector device electrically connects both ends of the third capacitor and a disconnecting state in which the third selector device electrically disconnects the both ends of the third capacitor; and the power receiving unit receives electric power from the power transmitting unit in a state where the first selector device and the third selector device are set in the disconnecting state. ### Claim 12 A contactless power transmitting device comprising: a power transmitting unit that contactlessly transmits electric power to a power receiving unit provided in a power receiving device, and that includes: a fourth coil; a fourth capacitor that is connected to the fourth coil; and a fourth selector device that is connected in parallel with the fourth capacitor and that is configured to be switched between a connecting state in which the fourth selector device electrically connects both ends of the fourth capacitor and a disconnecting state in which the fourth selector device electrically disconnects the both ends of the fourth capacitor; and a power supply unit that supplies electric power to the power transmitting unit. ### Claim 13 (depends on 12) The contactless power transmitting device according to claim 12, wherein the power transmitting unit transmits electric power to the power receiving unit in a state where the fourth selector device is in the disconnecting state. ### Claim 14 (depends on 12) The contactless power transmitting device according to claim 12, wherein the power transmitting unit further includes: a fifth coil; a fifth capacitor that is connected to the fifth coil; and a fifth selector device that is connected in parallel with the fifth capacitor and that is configured to be switched between a connecting state in which the fifth selector device electrically connects both ends of the fifth capacitor and a disconnecting state in which the fifth selector device electrically disconnects the both ends of the fifth capacitor. ### Claim 15 (depends on 14) The contactless power transmitting device according to claim 14, further comprising: a control unit that sets one of the fourth selector device and the fifth selector device, corresponding to one of the fourth coil and the fifth coil, which is used to transmit electric power, in the disconnecting state. ### Claim 16 (depends on 15) The contactless power transmitting device according to claim 15, wherein the control unit selects the one of the fourth coil and the fifth coil, which is used to transmit electric power, on the basis of a position of the power transmitting unit and a position of the power receiving unit. ### Claim 17 (depends on 12) The contactless power transmitting device according to claim 12, wherein a difference between a natural frequency of the power transmitting unit and a natural frequency of the power receiving unit is smaller than or equal to ±10% of the natural frequency of one of the power transmitting unit and the power receiving unit. ### Claim 18 (depends on 12) The contactless power transmitting device according to claim 12, wherein a coupling coefficient between the power transmitting unit and the power receiving unit is smaller than or equal to 0.1. ### Claim 19 (depends on 12) The contactless power transmitting device according to claim 12, wherein: the power transmitting unit transmits electric power to the power receiving unit through at least one of a magnetic field and an electric field; the magnetic field is formed between the power receiving unit and the power transmitting unit and oscillates at a specific frequency; and the electric field is formed between the power receiving unit and the power transmitting unit and oscillates at the specific frequency. ### Claim 20 A vehicle comprising: a power receiving unit that contactlessly receives electric power from a power transmitting unit provided in a power transmitting device, and that includes: a coil; a capacitor that is connected to the coil; and a selector device that is connected in parallel with the capacitor and that is configured to be switched between a connecting state in which the selector device electrically connects both ends of the capacitor and a disconnecting state in which the selector device electrically disconnects the both ends of the capacitor; and an electric load device that uses the electric power received by the power receiving unit. ### Claim 21 A contactless power supply system comprising: a power transmitting unit that is provided in a power transmitting device and that includes a plurality of coil units; a power receiving unit that is provided in a vehicle; and a control unit, wherein: each of the plurality of coil units includes: a coil; a capacitor that is connected to the coil; and a selector device that is connected in parallel with the capacitor and that is configured to be switched between a connecting state in which the selector device electrically connects both ends of the capacitor and a disconnecting state in which the selector device electrically disconnects the both ends of the capacitor; the control unit selects at least one of the coil units, which is used to transmit electric power, from among the plurality of coil units on the basis of a position of the power transmitting unit and a position of the power receiving unit; and the control unit executes control such that the selector device corresponding to the at least one selected coil unit is set in the disconnecting state and the selector device corresponding to the non-selected coil unit is set in the connecting state. ### Claim 22 A contactless power supply system comprising: a power transmitting unit that is provided in a power transmitting device; a power receiving unit that is provided in a vehicle and that includes a plurality of coil units; and a control unit, wherein: each of the plurality of coil units includes: a coil; a capacitor that is connected to the coil; and a selector device that is connected in parallel with the capacitor and that is configured to be switched between a connecting state in which the selector device electrically connects both ends of the capacitor and a disconnecting state in which the selector device electrically disconnects the both ends of the capacitor; the control unit selects at least one of the coil units, which is used to receive electric power, from among the plurality of coil units on the basis of a position of the power transmitting unit and a position of the power receiving unit; and the control unit executes control such that the selector device corresponding to the at least one selected coil unit is set in the disconnecting state and the selector device corresponding to the non-selected coil unit is set in the connecting state.