WO2012124029A1 - コイルユニット、送電装置、外部給電装置および車両充電システム - Google Patents
コイルユニット、送電装置、外部給電装置および車両充電システム Download PDFInfo
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- WO2012124029A1 WO2012124029A1 PCT/JP2011/055813 JP2011055813W WO2012124029A1 WO 2012124029 A1 WO2012124029 A1 WO 2012124029A1 JP 2011055813 W JP2011055813 W JP 2011055813W WO 2012124029 A1 WO2012124029 A1 WO 2012124029A1
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- coil
- vehicle
- resonance coil
- resonance
- side resonance
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/30—Constructional details of charging stations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/10—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines
- B60L50/16—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines with provision for separate direct mechanical propulsion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
- B60L53/12—Inductive energy transfer
- B60L53/126—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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/30—Constructional details of charging stations
- B60L53/35—Means for automatic or assisted adjustment of the relative position of charging devices and vehicles
- B60L53/36—Means for automatic or assisted adjustment of the relative position of charging devices and vehicles by positioning the vehicle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/30—Constructional details of charging stations
- B60L53/35—Means for automatic or assisted adjustment of the relative position of charging devices and vehicles
- B60L53/38—Means for automatic or assisted adjustment of the relative position of charging devices and vehicles specially adapted for charging by inductive energy transfer
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/14—Inductive couplings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/90—Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
- H04B5/24—Inductive coupling
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- H—ELECTRICITY
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- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
- H04B5/79—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for data transfer in combination with power transfer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2210/00—Converter types
- B60L2210/10—DC to DC converters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2210/00—Converter types
- B60L2210/40—DC to AC converters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2270/00—Problem solutions or means not otherwise provided for
- B60L2270/10—Emission reduction
- B60L2270/14—Emission reduction of noise
- B60L2270/147—Emission reduction of noise electro magnetic [EMI]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/12—Electric charging stations
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
Definitions
- the present invention relates to a coil unit, a power transmission device, an external power supply device, and a vehicle charging system.
- a vehicle and a power feeding device described in JP 2010-73976 A each include a communication coil.
- the communication coil mounted on the vehicle includes a resonance coil and a power receiving coil
- the communication coil mounted on the power feeding device includes a resonance coil and a power feeding coil.
- the non-contact transmission of electric power is made
- the present invention has been made in view of the above-described problems, and its object is to provide a coil unit, a power transmission device, and an external power supply in which an excessively strong magnetic field is prevented from leaking around the coil unit.
- An apparatus and a vehicle charging system are provided.
- the resonance coil according to the present invention includes a resonance coil that is electromagnetically coupled to an external resonance coil provided outside.
- the resonance coil includes an outer coil that extends around the first winding center around the first winding center, and an extending portion that extends from the outer coil into a region surrounded by the outer coil.
- the resonance coil includes an inner coil that is formed in an annular shape, and the direction of the magnetic field formed by the flow of current is the same as the direction of the magnetic field formed by the outer coil. It is a coil.
- a plurality of the inner coils are provided at intervals along the outer coil, and the abdomen is located in one of the plurality of inner coils.
- the inner coil extends so as to surround the periphery of the second winding center.
- the second winding center is located at a position away from the first winding center.
- the resonance coil is formed so that the abdomen is positioned closer to the first winding center than the second winding center.
- the resonance coil includes a first end and a second end. A capacitor connected to the first end and the second end is further provided. The abdomen is located at the center in the length direction from one end to the other end of the conducting wire forming the resonance coil.
- the resonance coil includes an inner coil that is formed in an annular shape and in which the direction of the magnetic field formed by the flow of current is the same as the direction of the magnetic field formed by the outer coil.
- a plurality of the inner coils are provided at intervals along the outer coil.
- the plurality of inner coils include a first inner coil in which an abdomen of the resonance coil is located, and a second inner coil including a first end and a second end, and a capacitor connected thereto.
- a resonance circuit is formed by the resonance coil and the capacitor.
- the abdomen is located at the center of the current path of the resonance circuit.
- an electromagnetic induction coil that is electromagnetically coupled to the resonance coil is further provided.
- the vehicle according to the present invention includes the coil unit, and the distance between the abdomen of the resonance coil and the center of the vehicle is smaller than the distance between the first winding center and the center of the vehicle.
- the external electric power feeder which concerns on this invention is provided with the said coil unit.
- the vehicle power receiving system according to the present invention includes the vehicle and the external power feeding device.
- the coil unit the power transmission device, the external power supply device, and the vehicle charging system according to the present invention, it is possible to suppress an excessively strong magnetic field from leaking to the surroundings.
- FIG. 2 is a schematic diagram schematically showing a vehicle 100 according to the first embodiment and an external power supply apparatus 200 that supplies power to the vehicle 100.
- FIG. It is a schematic diagram for demonstrating the principle of power transmission and power reception by a resonance method. It is the figure which showed the relationship between the distance from an electric current source (magnetic current source), and the intensity
- FIG. 5 is a plan view of the vehicle-side resonance coil 110 and the vehicle-side electromagnetic induction coil 120 viewed from the V direction shown in FIG. 4.
- FIG. 4 is an exploded view for explaining the vehicle side resonance coil 110 in detail. It is a perspective view which shows the connecting wire 116 and the structure of the circumference
- FIG. 2 is a side view showing a part of a vehicle-side resonance coil 110 and a vehicle-side electromagnetic induction coil 120.
- FIG. 4 is a schematic diagram showing a state when a current flows through the vehicle-side resonance coil 110.
- FIG. It is a circuit diagram which shows typically the vehicle side resonance coil 110 and the vehicle side capacitor 109 which were comprised as mentioned above.
- 4 is a development view of an LC resonator formed by a vehicle-side resonance coil 110, a vehicle-side capacitor 109, and connection wirings 132A and 113, and a graph showing a current value flowing in the resonance circuit. It is a graph which shows typically the position of a resonance circuit, and electric field strength EF and magnetic field strength MF formed around the position.
- FIG. 2 is a perspective view schematically showing an equipment-side coil unit 201. It is a top view when the installation side electromagnetic induction coil 230 and the installation side resonance coil 240 are seen from the XV direction shown in FIG. 6 is a plan view of the equipment-side resonance coil 240 when a current having a resonance frequency flows through the equipment-side resonance coil 240.
- FIG. It is a perspective view showing typically vehicle side resonance coil 110 and equipment side resonance coil 240 at the time of electric power transmission.
- FIG. 19 is a plan view showing a state where the vehicle-side resonance coil 110 is displaced from the position of the vehicle-side resonance coil 110 shown in FIG. 18.
- 2 is a perspective view showing a lower surface of vehicle 100.
- FIG. FIG. 21 is a bottom view of the vehicle 100.
- 1 is a perspective view showing a floor panel 11 and a vehicle side coil unit 101 of an electric vehicle.
- 4 is a partial side view showing a state when the vehicle 100 stops at a predetermined position of a parking space 202.
- FIG. 19 is a plan view showing a state where the vehicle-side resonance coil 110 is displaced from the position of the vehicle-side resonance coil 110 shown in FIG. 18.
- 2 is a perspective view showing a lower surface of vehicle 100.
- FIG. FIG. 21 is a bottom view of the vehicle 100.
- 1 is a perspective view showing a floor panel 11 and a vehicle side coil unit 101 of an electric vehicle.
- 4 is a partial side view showing a state when the vehicle 100 stops at
- FIG. 1 is a schematic diagram schematically showing a vehicle 100 according to the first embodiment and an external power supply apparatus 200 that supplies power to the vehicle 100.
- the vehicle 100 stops at a predetermined position of the parking space 202 where the external power feeding device 200 is provided, and mainly receives power from the external power feeding device 200. Vehicle 100 can also supply power to external power supply apparatus 200.
- a stop 203 and a line are provided so that the vehicle 100 stops at a predetermined position.
- the external power supply apparatus 200 includes a high frequency power driver 220 connected to an AC power source 210 and a facility side coil unit 201 connected to the high frequency power driver 220.
- the facility-side coil unit 201 mainly functions as a non-contact power transmission device.
- the facility-side coil unit 201 includes a facility-side resonance coil 240, a facility-side capacitor 250 connected to the facility-side resonance coil 240, and a facility-side A facility-side electromagnetic induction coil 230 that is electrically connected to the resonance coil 240 is included.
- AC power supply 210 is a power supply external to the vehicle, for example, a system power supply.
- the high frequency power driver 220 converts power received from the AC power source 210 into high frequency power, and supplies the converted high frequency power to the facility-side electromagnetic induction coil 230.
- the frequency of the high frequency power generated by the high frequency power driver 220 is, for example, 1 M to several tens of MHz.
- the facility-side electromagnetic induction coil 230 is supplied with the above high-frequency power, so that the amount of magnetic flux generated from the facility-side electromagnetic induction coil 230 changes over time.
- the facility-side resonance coil 240 is electromagnetically coupled to the facility-side electromagnetic induction coil 230.
- a high-frequency current is also supplied to the facility-side resonance coil 240 by electromagnetic induction. Flowing.
- the frequency of the high-frequency current flowing through the equipment-side resonance coil 240 is substantially equal to the resonance frequency determined by the reluctance of the equipment-side electromagnetic induction coil 230 and the capacity C of the equipment-side capacitor 250.
- a current is supplied to the induction coil 230.
- the equipment-side resonance coil 240 and the equipment-side capacitor 250 function as an LC resonator.
- an electric field and a magnetic field having substantially the same frequency as the resonance frequency are formed around the equipment-side resonance coil 240.
- an electromagnetic field (electromagnetic field) having a predetermined frequency is formed around the equipment-side resonance coil 240.
- the vehicle 100 includes an LC resonator having the same resonance frequency as the LC resonator formed by the equipment-side resonance coil 240 and the equipment-side capacitor 250.
- the LC resonator, the equipment-side resonance coil 240, and the equipment Electric power is transmitted from the external power supply apparatus 200 to the vehicle 100 by electromagnetic resonance coupling with the LC resonator formed by the side capacitor 250.
- the vehicle 100 and the external power supply apparatus 200 are configured so that the vehicle from the external power supply apparatus 200 side mainly uses a near field (evanescent field) out of the electromagnetic field formed by the equipment side resonance coil 240 and the equipment side capacitor 250. 100 is supplying power.
- the details of the wireless power transmission / reception method using the electromagnetic resonance method will be described later.
- the vehicle 100 includes a vehicle-side coil unit 101 mainly functioning as a non-contact power receiving device, a rectifier 130 connected to the vehicle-side coil unit 101, a DC / DC converter 140 connected to the rectifier 130, and the DC / DC A battery 150 connected to the DC converter 140, a power control unit (PCU (Power Control Unit)) 160, a motor unit 170 connected to the power control unit 160, a DC / DC converter 140, a power control unit 160, etc.
- Vehicle ECU (Electronic Control Unit) 180 that controls the driving of the vehicle.
- the vehicle 100 is a hybrid vehicle including an engine (not shown), but includes an electric vehicle and a fuel cell vehicle as long as the vehicle is driven by a motor.
- the vehicle side coil unit 101 includes a vehicle side resonance coil 110, a vehicle side capacitor 109 connected to the vehicle side resonance coil 110, and a vehicle side electromagnetic induction coil 120 coupled to the vehicle side resonance coil 110 by electromagnetic induction. .
- the detailed configuration of the vehicle side coil unit 101 will be described later.
- the vehicle-side resonance coil 110 and the vehicle-side capacitor 109 constitute an LC resonator.
- the resonance frequency of the LC resonator formed by the vehicle-side resonance coil 110 and the vehicle-side capacitor 109, the equipment-side resonance coil 240, and the equipment substantially matches.
- the vehicle-side resonance coil 110 When the vehicle-side resonance coil 110 is disposed within a range of, for example, about several meters from the facility-side resonance coil 240, the LC resonator formed by the vehicle-side resonance coil 110 and the vehicle-side capacitor 109 resonates. As a result, a current flows through the vehicle-side resonance coil 110. Thus, the vehicle-side resonance coil 110 and the facility-side resonance coil 240 are electromagnetically resonantly coupled.
- the vehicle-side electromagnetic induction coil 120 is electromagnetically coupled to the vehicle-side resonance coil 110, and takes out the electric power received by the vehicle-side resonance coil 110.
- the vehicle-side electromagnetic induction coil 120 sequentially extracts power from the vehicle-side resonance coil 110, power is sequentially supplied from the equipment-side resonance coil 240 to the vehicle-side resonance coil 110 via the electromagnetic field.
- the vehicle-side coil unit 101 and the facility-side coil unit 201 employ a so-called electromagnetic resonance wireless transmission / reception system.
- the rectifier 130 is connected to the vehicle-side electromagnetic induction coil 120, converts an alternating current supplied from the vehicle-side electromagnetic induction coil 120 into a direct current, and supplies the direct current to the DC / DC converter 140.
- the DC / DC converter 140 adjusts the voltage of the direct current supplied from the rectifier 130 and supplies it to the battery 150.
- the power control unit 160 includes a converter connected to the battery 150 and an inverter connected to the converter, and the converter adjusts (boosts) the direct current supplied from the battery 150 and supplies it to the inverter.
- the inverter converts the direct current supplied from the converter into an alternating current and supplies it to the motor unit 170.
- the motor unit 170 employs, for example, a three-phase AC motor and is driven by an AC current supplied from an inverter of the power control unit 160.
- the DC / DC converter 140 When supplying the electric power stored in the battery 150 to the AC power supply 210, for example, the DC / DC converter 140 boosts the current from the battery 150 and supplies it to the rectifier 130.
- the rectifier 130 converts the direct current from the DC / DC converter 140 into a high frequency current.
- the frequency of the high-frequency current is the resonance frequency described above.
- the rectifier 130 supplies this high-frequency current to the vehicle-side electromagnetic induction coil 120.
- the vehicle-side resonance coil 110 receives a high-frequency current from the vehicle-side electromagnetic induction coil 120 by electromagnetic induction.
- the frequency of the high-frequency current substantially matches the resonance frequency, and the LC resonator formed by the vehicle-side resonance coil 110 and the vehicle-side capacitor 109 resonates.
- An electromagnetic field (electromagnetic field) having a frequency equal to the resonance frequency is formed around the vehicle-side resonance coil 110.
- the LC resonator formed by the equipment side resonance coil 240 and the equipment side capacitor 250 resonates by arranging the equipment side resonance coil 240 from the vehicle side resonance coil 110 within a range of about several meters, for example. . Then, the electric power supplied to the facility-side resonance coil 240 is drawn out to the facility-side electromagnetic induction coil 230 by electromagnetic induction. The power drawn out to the facility-side resonance coil 240 is supplied to the AC power supply 210 through the high-frequency power driver 220.
- vehicle 100 When vehicle 100 is a hybrid vehicle, vehicle 100 further includes an engine and a power split mechanism, and motor unit 170 includes a motor generator that mainly functions as a generator and a motor generator that mainly functions as an electric motor. Including.
- the vehicle-side coil unit 101 and the facility-side coil unit 201 are a wireless power transmission / reception method, and a resonance method using an electromagnetic field is employed.
- FIG. 2 is a schematic diagram for explaining the principle of power transmission and power reception by the resonance method. The principle of power transmission and power reception by the resonance method will be described with reference to FIG.
- two LC resonance coils having the same natural frequency resonate in an electromagnetic field (near field), and thereby, from one coil. Electric power is transmitted to the other coil via an electromagnetic field.
- the primary coil 320 is connected to the high-frequency power source 310, and high-frequency power of 1 M to several tens of MHz is supplied to the primary self-resonant coil 330 that is magnetically coupled to the primary coil 320 by electromagnetic induction.
- the primary self-resonant coil 330 is an LC resonator based on the inductance of the coil itself and stray capacitance (including the capacitance of the capacitor when a capacitor is connected to the coil), and has the same resonance frequency as that of the primary self-resonant coil 330. Resonates with the secondary self-resonant coil 340 having an electromagnetic field (near field).
- FIG. 2 shows the correspondence relationship between the configuration of FIG. 2 and the configuration of FIG. 1, the AC power supply 210 and the high-frequency power driver 220 shown in FIG. 1 correspond to the high-frequency power supply 310 of FIG.
- the facility-side electromagnetic induction coil 230 shown in FIG. 1 corresponds to the primary coil 320 of FIG.
- the facility-side resonance coil 240 and the facility-side capacitor 250 shown in FIG. 1 correspond to the primary self-resonance coil 330 and the stray capacitance of the primary self-resonance coil 330 in FIG.
- the vehicle-side electromagnetic induction coil 120 shown in FIG. 1 corresponds to the secondary coil 350 of FIG.
- the rectifier 130, the DC / DC converter 140, and the battery 150 shown in FIG. 1 correspond to the load 360 shown in FIG.
- the wireless power transmission / reception method uses a near field (evanescent field) in which the “electrostatic field” of the electromagnetic field is dominant to improve power transmission and power reception efficiency. .
- FIG. 3 is a diagram showing the relationship between the distance from the current source (magnetic current source) and the strength of the electromagnetic field.
- the electromagnetic field is composed of three components.
- a curve k1 is a component inversely proportional to the distance from the wave source, and is referred to as a “radiating electric field”.
- a curve k2 is a component inversely proportional to the square of the distance from the wave source, and is referred to as an “induced electric field”.
- the curve k3 is a component that is inversely proportional to the cube of the distance from the wave source, and is referred to as an “electrostatic field”.
- the “electrostatic field” is a region where the intensity of the electromagnetic wave suddenly decreases with the distance from the wave source.
- energy electric power
- the near field evanescent field
- Is transmitted That is, by resonating a pair of resonators having the same natural frequency (for example, a pair of LC resonance coils) in a near field where the “electrostatic field” is dominant, the resonance from one resonator (primary self-resonance coil) to the other Energy (electric power) is transmitted to the resonator (secondary self-resonant coil). Since this “electrostatic field” does not propagate energy far away, the resonance method can transmit power with less energy loss than electromagnetic waves that transmit energy (electric power) by “radiant electric field” that propagates energy far away. it can.
- the vehicle 100 and the external power supply apparatus 200 use the resonance of the near field of the electromagnetic field, and the vehicle-side coil unit 101 of the vehicle 100 and the equipment side of the external power supply apparatus 200. Electric power is transmitted to and received from the coil unit 201.
- the inventors of the present application form a particularly strong magnetic field around a specific part of the vehicle-side resonance coil 110 and a specific part of the equipment-side resonance coil 240 in the process of receiving and transmitting power.
- the present invention which has been found, aims to suppress leakage of a strong magnetic field around the vehicle 100 during power reception and power transmission, and a specific configuration thereof will be described below.
- FIG. 4 is a perspective view schematically showing the vehicle-side coil unit 101 mounted on the vehicle.
- the vehicle side coil unit 101 includes a vehicle side resonance coil 110, a vehicle side electromagnetic induction coil 120, a vehicle side capacitor 109 connected to the vehicle side resonance coil 110, a vehicle side capacitor 109, and A connection wiring 132A and a connection wiring 132B for connecting the vehicle-side resonance coil 110 are included.
- the vehicle-side resonance coil 110 includes an end 131A and an end 131B.
- the end 131A is connected to the connection wiring 132A
- the end 131B is connected to the connection wiring 132B.
- the vehicle side capacitor 109 and the vehicle side resonance coil 110 are connected in series by the connection wiring 132A and the connection wiring 132B.
- the connection wires 132A and 132B and the vehicle-side resonance coil 110 are formed integrally.
- the connection wires 132A and 132B are formed by bending the coil wires constituting the vehicle-side resonance coil 110 at the end portions 131A and 131B.
- FIG. 5 is a plan view of the vehicle-side resonance coil 110 and the vehicle-side electromagnetic induction coil 120 as viewed from the V direction shown in FIG.
- the vehicle-side electromagnetic induction coil 120 is indicated by a broken line.
- the vehicle-side resonance coil 110 is disposed below the vehicle-side electromagnetic induction coil 120.
- the vehicle-side resonance coil 110 is connected to the outer coil 115 extending so as to surround the winding center line O1, and the outer coil 115, A plurality of inner coils 111, 112, 113, 114 disposed in a region surrounded by the outer coil 115 and a plurality of crossover wires 116, 117, 118, 119 are included.
- the outer coil 115 and the vehicle-side electromagnetic induction coil 120 are formed such that one is along the other.
- the outer coil 115 is formed to extend along the circumference of the winding center line O1.
- the inner coils 111, 112, 113, 114 are arranged at intervals in the circumferential direction of the outer coil 115.
- the inner coils 111, 112, 113, 114 are arranged in a ring around the winding center line O1, and the winding center of each inner coil 111, 112, 113, 114 is around the winding center line O1. It is arranged at equal intervals.
- the inner coils 111, 112, 113, 114 are arranged so as to be inscribed in the inner peripheral edge portion of the outer coil 115. For this reason, each diameter of the inner side coils 111, 112, 113, and 114 can be ensured large, and power receiving and power transmission efficiency can be improved.
- the vehicle-side resonance coil 110 is formed from one conducting wire, and the outer coil 115, the inner coils 111, 112, 113, 114 and the connecting wires 116, 117, 118, 119 are integrally formed from one conducting wire. ing.
- the vehicle-side electromagnetic induction coil 120 that transmits and receives power to and from the vehicle-side resonance coil 110 can be integrated into one, reducing the number of parts. Can be planned.
- the outer coil 115 and the inner coils 111, 112, 113, and 114 are one-turn coils, and the vehicle-side resonance coil 110 is made compact.
- FIG. 6 is an exploded view for explaining the vehicle side resonance coil 110 in detail, and is an exploded view when the vehicle side resonance coil 110 is cut for each component constituting the vehicle side resonance coil 110.
- the outer coil 115 includes a plurality of arc portions 115a to 115d.
- Each of the arc portions 115a to 115d is formed to extend in an arc shape around the winding center line O1 shown in FIGS.
- the shape of the outer coil 115 is not limited to a circular shape, and various shapes such as a square shape, a polygonal shape, and an elliptical shape can be employed.
- the inner coils 111, 112, 113, and 114 are also substantially circular, but are not limited to a circular shape, and various shapes such as a square shape, a polygonal shape, and an elliptical shape can be employed.
- the center lines of the inner coils 111, 112, 113, 114 are separated from the winding center line O1 and are arranged around the winding center line O1.
- Crossover wires 116, 117, 118, and 119 connect the inner coils 111, 112, 113, and 114 to the arc portions 115a, 115b, 115c, and 115d.
- the connecting wire 116 connects one end of the arc portion 115 a and one end of the inner coil 111, and the other end of the arc portion 115 a is connected to one end of the inner coil 112.
- the connecting wire 117 connects the other end of the inner coil 112 and one end of the arc portion 115 b, and the other end of the arc portion 115 b is connected to one end of the inner coil 113.
- the connecting wire 118 connects the other end of the inner coil 113 and one end of the arc portion 115 c, and the other end of the arc portion 115 c is connected to one end of the inner coil 114.
- the connecting wire 119 connects the other end of the inner coil 114 and one end of the arc portion 115d. The other end of the arc portion 115 d is connected to the other end of the inner coil 111.
- FIG. 7 is a perspective view showing the crossover 116 and the surrounding structure. As shown in FIGS. 7 and 4, the connecting wire 116 is formed so as to straddle the inner coil 111 that is a part of the vehicle-side resonance coil 110.
- the connecting wire 116 is curved so as to bulge toward the vehicle-side electromagnetic induction coil 120 side.
- the other connecting wires 117, 118, and 119 are also formed in the same manner as the vehicle-side electromagnetic induction coil 120, and are formed so as to straddle part of the vehicle-side resonance coil 110.
- the distance L2 between the crossover wires 116, 117, 118, 119 and a part of the vehicle-side resonance coil 110 is set to be larger than the diameter of the conducting wire constituting the vehicle-side resonance coil 110, for example. The occurrence of discharge between the crossover wires 116, 117, 118, 119 and the vehicle-side resonance coil 110 is suppressed.
- FIG. 8 is a side view showing a part of the vehicle side resonance coil 110 and the vehicle side electromagnetic induction coil 120. As shown in FIG. 8, the vehicle-side electromagnetic induction coil 120 includes a curved portion 121 that extends along the crossover line 116.
- the bending portion 121 is bent so that the distance L1 between the bending portion 121 and the connecting wire 116 is equal to the distance between the portion of the vehicle-side electromagnetic induction coil 120 other than the bending portion 121 and the vehicle-side resonance coil 110. is doing.
- the vehicle-side electromagnetic induction coil 120 includes curved portions 122, 123, and 124 that extend along the connecting wires 117, 118, and 119 of the vehicle-side resonance coil 110.
- the vehicle-side electromagnetic induction coil 120 and the vehicle-side resonance coil 110 are formed such that the distance between them is a constant distance L1 over the entire circumference.
- FIG. 9 is a schematic diagram showing a state when a current flows through the vehicle-side resonance coil 110. As shown in FIG. 9, when a current flows through the vehicle-side resonance coil 110, a current flows through the outer coil 115 in the current direction D0. A current flows through the inner coils 111, 112, 113, and 114 in the current directions D1, D2, D3, and D4.
- FIG. 11 is a development view of an LC resonator formed by the vehicle-side resonance coil 110, the vehicle-side capacitor 109, and the connection wirings 132A and 113, and a graph showing a current value flowing in the resonance circuit.
- the end of the electrode 134 is the circuit start point LO of the resonance circuit, and the end of the electrode 135 is the circuit end LE of the resonance circuit.
- a curve CL1 shows the distribution of the current amount at an arbitrary time when the electromagnetic resonance coupling is performed.
- Curves CL2 to CL7 show the distribution of current amount that changes every moment from the time point of the curve CL1.
- the current flowing in the resonance circuit has a “belly” portion at the intermediate position LM1.
- the distance between the connection position of the connection wiring 132A and the electrode 134 and the circuit start point LO and the distance between the connection position of the electrode 135 and the connection wiring 132B and the circuit end LE are substantially equal.
- the length of the connection wiring 132A is equal to the length of the connection wiring 132B.
- the intermediate position LM1 is located at the center in the length direction of the conducting wire forming the vehicle-side resonance coil 110.
- the amount of current becomes maximum at the “anti-node” portion. Therefore, a portion of the vehicle-side resonance coil 110 that becomes the “antinode” of the resonant alternating current is defined as an abdominal portion AM1.
- FIG. 12 is a graph schematically showing the position of the resonance circuit and the electric field strength EF and magnetic field strength MF formed around the position. As is apparent from FIG. 12, a high-intensity magnetic field is formed around the abdomen AM1 of the vehicle-side resonance coil 110.
- the resonance circuit including the vehicle-side resonance coil 110 has been described. However, even in the LC resonance circuit formed by the facility-side resonance coil 240, the facility-side capacitor 250, and the connection wiring, the vehicle-side resonance is also performed.
- the current distribution, the magnetic field strength distribution, and the electric field strength distribution are the same as those of the LC resonance circuit including the coil 110.
- FIG. 13 is a plan view showing the vehicle-side resonance coil 110 when the vehicle-side resonance coil 110 and the facility-side resonance coil 240 are electromagnetically resonantly coupled.
- a broken line schematically shows a near field having a high magnetic field strength.
- the near field NF1 includes a unit near field UNF0 formed around the outer coil 115 and unit near fields UNF1 to UNF4 formed around the inner coils 111 to 114.
- the inner coils 111, 112, 113, 114 are arranged at equal intervals around the winding center line O1, and are symmetrically arranged around the winding center line O1.
- the lengths of the coil wires constituting the inner coils 111, 112, 113, 114 are substantially the same, and the outer coil 115 is also formed symmetrically around the winding center line O1.
- An end 131 ⁇ / b> A and an end 131 ⁇ / b> B of the vehicle-side resonance coil 110 are formed in the inner coil 112.
- the wiring lengths of the connection wiring 132A and the connection wiring 132B are substantially the same.
- the abdomen AM1 of the vehicle-side resonance coil 110 is symmetric with the winding center line O1 with respect to the inner coil 112. Located on the inner coil 114.
- the abdomen AM1 is located in the inner coil 114, and it can be seen that a near field having a higher magnetic field intensity is formed around the abdomen AM1 in a wider range than the other parts.
- the inner coil 114 is located in a region surrounded by the outer coil 115. For this reason, even if a high-intensity magnetic field is formed around the abdominal part AM1, the high-intensity magnetic field can be prevented from spreading to a wide range outside the vehicle-side resonance coil 110.
- the end 131A and the end 131B are located on the winding center line O1 side of the inner coil 112 with respect to the winding center line O112 of the inner coil 112.
- the abdominal part AM1 is also located on the winding center line O1 side of the inner coil 114 with respect to the winding center line O114 of the inner coil 114. Thereby, it can suppress that the magnetic field with high intensity
- the abdominal part AM1 is located in a portion of the inner coil 114 that is closest to the winding center line O1.
- FIG. 14 is a perspective view schematically showing the equipment-side coil unit 201
- FIG. 15 is a plan view of the equipment-side electromagnetic induction coil 230 and the equipment-side resonance coil 240 when viewed from the XV direction shown in FIG. is there.
- the equipment-side coil unit 201 includes equipment-side resonance coils 240, equipment-side electromagnetic induction coils 230 arranged below the equipment-side resonance coils 240, and equipment-side resonance coils 240.
- the connected equipment side capacitor 250 and connection wirings 252A and 252B for connecting the equipment side capacitor 250 and the equipment side resonance coil 240 are included.
- the facility-side resonance coil 240 includes an end 251A and an end 251B.
- a connection wiring 252A is connected to the end 251A, and a connection wiring 252B is connected to the end 251B.
- the connection wiring 252A and the connection wiring 252B are also formed by bending the coil wire forming the equipment-side resonance coil 240 at the end portions of the end portion 251A and the end portion 251B.
- the facility-side resonance coil 240 has substantially the same shape as the vehicle-side resonance coil 110.
- the facility-side resonance coil 240 includes an outer coil 245, a plurality of inner coils 241, 242, 243, and 244 disposed inside the outer coil 245, and the outer coil 245 and the inner coils 241, 242, 243, and 244.
- the connecting connecting lines 246, 247, 248, 249 are included.
- the winding center lines of the inner coils 241, 42, 243, and 244 are arranged at equal intervals around the winding center line O2.
- the facility side resonance coil 240 is also formed from one conducting wire, like the vehicle side resonance coil 110. For this reason, the installation side electromagnetic induction coil 230 etc. which transfer electric power between the installation side resonance coils 240 can be made into one, and the apparatus can be simplified.
- the equipment side electromagnetic induction coil 230 when viewing the equipment side resonance coil 240 and the equipment side electromagnetic induction coil 230 in the direction of viewing the center point of the equipment side resonance coil 240 from the point on the winding center line O2, the equipment side electromagnetic induction coil 230 is It is formed so as to overlap with the outer coil 245. For this reason, transfer of the electric power between the installation side resonance coil 240 and the installation side electromagnetic induction coil 230 is performed efficiently.
- the outer coil 245 includes arcuate arc portions 245a, 245b, 245c, and 245d that extend around the winding center line O2, and the arc portions 245a, 245b, 245c, 245d and the inner coils 241, 242, 243, 244 are connected.
- the connecting wires 246, 247, 248, and 249 are formed so as to straddle a part of the equipment-side resonance coil 240 and bend so as to swell toward the equipment-side electromagnetic induction coil 230. is doing.
- the facility-side electromagnetic induction coil 230 includes curved portions 231, 232, 233, and 234 that are curved in accordance with the shapes of the crossover wires 246, 247, 248, and 249, and the facility-side electromagnetic induction coil 230 and The occurrence of discharge between the equipment side resonance coil 240 is suppressed.
- the inner coils 241, 242, 243, 244 are arranged symmetrically around the winding center line O2.
- an alternating current having a resonance frequency flows through the equipment side resonance coil 240.
- the antinode of the alternating current is located at the center portion in the length direction of the conductor forming the equipment-side resonance coil 240, the connection wiring 252A, the connection wiring 252B, and the equipment-side capacitor 250.
- the lengths of the two electrodes constituting the facility-side capacitor 250 are substantially equal, and the wiring lengths of the connection wiring 252A and the connection wiring 252B are substantially equal.
- the antinode of the alternating current is located at the center in the length direction of the coil wire forming the equipment-side resonance coil 240.
- the part which becomes an antinode of an alternating current among the installation side resonance coils 240 is set to the abdominal part AM2.
- FIG. 16 is a plan view of the equipment-side resonance coil 240 when a current having a resonance frequency flows through the equipment-side resonance coil 240.
- the broken line shown in FIG. 16 is a figure which shows typically the area
- a near-field NF ⁇ b> 2 is formed around the equipment-side resonance coil 240 when a current having a resonance frequency flows through the equipment-side resonance coil 240.
- the near field NF2 includes a unit near field UNF10 formed around the outer coil 245 and unit near fields UNF11, UNF12, UNF13, UNF14 formed around the inner coils 241, 242, 243, 244.
- the abdomen AM2 is located in the inner coil 244.
- the abdominal part AM2 is located in a portion of the inner coil 244 that is closer to the winding center line O2 than the winding center line O244 of the inner coil 244.
- the vehicle-side resonance coil 110 When charging the battery 150 mounted on the vehicle 100, the vehicle-side resonance coil 110 is positioned above the equipment-side resonance coil 240 as shown in FIG.
- FIG. 18 is a plan view showing a positional relationship between the vehicle-side resonance coil 110 and the near field NF2 in a state where the vehicle-side resonance coil 110 and the facility-side resonance coil 240 are arranged in the vertical direction.
- the vehicle-side resonance coil 110 is located in the near field NF2, and electric power is favorably transmitted from the equipment-side resonance coil 240 to the vehicle-side resonance coil 110.
- FIG. 19 is a plan view showing a state in which the vehicle-side resonance coil 110 is displaced from the position of the vehicle-side resonance coil 110 shown in FIG.
- the vehicle-side resonance coil 110 is displaced from the normal position.
- the vehicle-side resonance coil 110 includes a plurality of inner coils 111, 112, 113, and 114 in plan view, the vehicle-side resonance coil 110 intersects the near field NF2 at many positions. Yes. For this reason, as shown in FIG. 19, even if the vehicle-side resonance coil 110 is displaced, power is transmitted to the vehicle-side resonance coil 110 from the equipment-side resonance coil 240, and reduction in power transmission efficiency is suppressed. Has been.
- the size of the vehicle-side resonance coil 110 itself is suppressed from increasing.
- the vehicle side coil unit 101 and the facility side coil unit 201 it is possible to prevent a high-intensity magnetic field from leaking to a wide range outside the resonance coils, and Even if the side resonance coil 110 and the equipment side resonance coil 240 are misaligned, it is possible to suppress a decrease in power transmission / reception efficiency.
- the inventors of the present application have devised the mounting manner of the vehicle-side resonance coil 110 and the equipment-side resonance coil 240 to suppress leakage of a high-intensity magnetic field around the vehicle 100. This will be described with reference to the drawings.
- FIG. 20 is a perspective view showing the lower surface of the vehicle 100
- FIG. 21 is a bottom view of the vehicle 100, showing a position where the vehicle-side resonance coil 110 is arranged.
- FIG. 22 is a perspective view showing the floor panel 11 and the vehicle side coil unit 101 of the electric vehicle.
- the inner coil 114 is located at the center in the width direction of the electric vehicle 100. Further, among the inner coils 111 to 114, the inner coil 114 is disposed at a position closest to the center point O4 of the electric vehicle 100. In other words, the vehicle-side resonance coil 110 is arranged such that the distance between the abdomen AM1 and the center point O4 of the vehicle 100 is smaller than the distance between the winding center line O1 and the center point O4. Yes.
- a region R1 and a region R2 illustrated in FIG. 21 indicate regions having a strong magnetic field strength. Since the abdominal part AM1 is disposed at a position close to the center of the vehicle 100, the high-strength regions R1, R2 formed around the abdominal part AM1 are prevented from leaking around the vehicle 100.
- the abdomen AM1 is disposed at the center in the width direction of the vehicle 100, and a high-intensity magnetic field formed around the abdomen AM1 can be prevented from leaking from the side surface side of the vehicle 100.
- the abdominal part AM1 is located in a region surrounded by the outer coil 115, even if the vehicle-side resonance coil 110 is mounted on the electric vehicle 100 in a state where it is rotated from a predetermined position, a magnetic field having a high strength is generated. Leakage around electric vehicle 100 can be suppressed. For example, even if the vehicle-side resonance coil 110 is mounted with the vehicle-side resonance coil 110 rotated 90 ° from the state shown in FIG. 21, the distance between the abdominal part AM1 and the side surface of the electric vehicle 100 is secured. Further, it is possible to prevent the high-strength magnetic field from leaking from the side surface of the electric vehicle 100.
- the abdominal part AM1 is disposed on the center line O5 that passes through the center part in the width direction of the vehicle 100 and extends in the front-rear direction of the vehicle 100, but is not limited to this position. It may be located around it.
- vehicle 100 includes a pair of side members 10 ⁇ / b> A and 10 ⁇ / b> B arranged in the vehicle width direction, a pair of rear side members 10 ⁇ / b> C and 10 ⁇ / b> D arranged in the vehicle width direction, and floor panel 11. including.
- the floor panel 11 is fixed to the upper surfaces of the side members 10A and 10B and the upper surfaces of the rear side members 10C and 10D.
- the vehicle side coil unit 101 is provided on the lower surface of the floor panel 11.
- the rear side member 10C is connected to the rear end of the side member 10A
- the rear side member 10D is connected to the rear end of the side member 10B.
- the vehicle side coil unit 101 and the rear side members 10C and 10D are viewed from above the vehicle side coil unit 101 and the rear side members 10C and 10D, the vehicle side coil unit 101 is disposed between the rear side member 10C and the rear side member 10D. ing.
- the vehicle side coil unit 101 is disposed between the rear side member 10C and the rear side member 10D, and the rear side members 10C and 10D protrude from the lower surface of the floor panel 11, so that the rear side member The high-strength magnetic field is prevented from leaking to the outside by 10C and the rear side member 10D.
- the vehicle side coil unit 101 by arranging the vehicle side coil unit 101 between the rear side members 10C and 10D, it is possible to protect the vehicle side coil unit 101 even if the vehicle 100 is subjected to a side collision.
- the vehicle-side resonance coil 110 is disposed so that the abdomen AM1 is positioned between a pair of rear wheels arranged in the width direction, so that the magnetic field formed around the abdomen AM1 by the rear wheel is And the vehicle side coil unit 101 can be protected from an external impact.
- the wiring distance between the vehicle side coil unit 101 and the battery 150 can be shortened.
- FIG. 23 is a partial side view showing a state when the vehicle 100 stops at a predetermined position in the parking space 202.
- the parking space 202 is provided with a wheel stop 203 that stops the rear wheel of the vehicle 100. By stopping the vehicle 100 so that the rear wheel hits the wheel stop 203, the vehicle 100 is stopped. Stops at a predetermined position in the parking space 202.
- the facility-side coil unit 201 is provided at a position facing the vehicle-side coil unit 101 in the vertical direction.
- abdominal part AM1 and abdominal part AM2 oppose each other in the height direction. For this reason, it is possible to suppress a high-strength magnetic field formed around the abdomen AM2 from leaking between the ground and the vehicle. Furthermore, by arranging the abdominal part AM1 and the abdominal part AM2 in the height direction, the degree of coupling between the vehicle-side resonance coil 110 and the facility-side resonance coil 240 can be increased, and the power transmission efficiency and the power reception efficiency can be increased.
- the abdominal part AM1 is located in a region surrounded by the outer coil 115, and the abdominal part AM2 is located in a region surrounded by the outer coil 245, so that it is formed around the abdominal part AM2 during power transmission. It is possible to prevent a high-intensity magnetic field from leaking out between the vehicle and the ground. Furthermore, even if the vehicle-side resonance coil 110 and the equipment-side resonance coil 240 face each other in a relatively rotated state, the distance between the abdominal part AM1 and the abdominal part AM2 is short. The transmission efficiency between the coils 240 can be increased.
- the inner coil 114 where the abdominal part AM1 is positioned may be provided so that the abdominal part AM1 is positioned within the region surrounded by the outer coil 115.
- vehicle-side capacitor 109 is located on outer coil 115.
- the inner coil 114 positioned in the region surrounded by the outer coil 115 is formed so that the abdomen AM1 is positioned in the region surrounded by the outer coil 115.
- the vehicle-side resonance coil 110 is formed so that the abdomen AM1 is positioned on the inner coil 114.
- the inner coil 114 is provided so that the abdominal part AM1 is located in a region surrounded by the outer coil 115.
- the vehicle-side resonance coil 110 may be formed such that an extension portion extending toward the vehicle is formed, and the abdomen AM1 is positioned on the extension portion.
- the vehicle-side resonance coil 110 When the inner coil 114 is formed in the vehicle-side resonance coil 110 as a means for positioning the abdominal part AM1 within the region surrounded by the outer coil 115, the vehicle-side resonance coil 110 and the equipment-side resonance coil 240 are relative to each other. Even if the position is shifted, it is possible to suppress a decrease in transmission efficiency.
- an extension portion extending from the outer coil 245 into a region surrounded by the outer coil 245 is formed, and the abdomen AM2 is formed in the extension portion.
- the facility-side resonance coil 240 may be formed so as to be positioned.
- the present invention can be applied to a coil unit, a power transmission device, an external power supply device, and a vehicle charging system.
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Abstract
Description
外側コイル115が取り囲む領域内に配置された複数の内側コイル111,112,113,114と、複数の渡り線116、117,118,119とを含む。
Claims (11)
- 外部に設けられた外部共鳴コイル(240)と電磁界共振結合する共鳴コイル(110)を備え、
前記共鳴コイル(110)は、第1巻回中心(O1)を中心として前記第1巻回中心(O1)の周囲を囲むように延びる外側コイル(115)と、前記外側コイル(115)から前記外側コイル(115)で囲まれた領域内に延出する延出部とを含み、
前記外部共鳴コイル(240)と前記共鳴コイル(110)とが電磁界共振結合しているときに、前記共鳴コイル(110)を流れる交流電流の腹となる部分を共鳴コイル(110)の腹部とすると、前記共鳴コイル(110)は、前記腹部(AM1)が前記延出部(114)に位置するように形成された、コイルユニット。 - 前記共鳴コイル(110)は、環状に形成され、電流が流れることで形成される磁界の方向が前記外側コイル(115)が形成する磁界の向きと同じ向きとされた内側コイル(114)を含み、
前記延出部は、前記内側コイル(114)である、請求項1に記載のコイルユニット。 - 前記内側コイルは、前記外側コイルに沿って間隔をあけて複数設けられ、
複数の前記内側コイルの1つに、前記腹部(AM1)が位置する、請求項2に記載のコイルユニット。 - 前記内側コイル(114)は、第2巻回中心(O114)の周囲を囲むように延び、
前記第2巻回中心(O114)は、前記第1巻回中心(O1)から離れた位置に位置し、
前記共鳴コイル(110)は、前記腹部(AM1)が前記第2巻回中心(O114)よりも前記第1巻回中心(O1)側に位置するように形成された、請求項2に記載のコイルユニット。 - 前記共鳴コイル(110)は、第1端部および第2端部を含み、
前記第1端部および第2端部に接続されたキャパシタをさらに備え、
前記腹部(AM1)は、前記共鳴コイル(110)を形成する導線の一端から他端までの長さ方向の中央部に位置する、請求項1に記載のコイルユニット。 - 前記共鳴コイル(110)は、環状に形成され、電流が流れることで形成される磁界の方向が前記外側コイル(115)が形成する磁界の向きと同じ向きとされた内側コイル(114)を含み、
前記内側コイルは、前記外側コイルに沿って間隔をあけて複数設けられ、
複数の前記内側コイルは、前記共鳴コイル(110)の腹部(AM1)が位置する第1内側コイル(114)と、前記第1端部および第2端部を含み、前記キャパシタが接続された第2内側コイル(109)とを含む、請求項5に記載のコイルユニット。 - 前記共鳴コイル(110)と前記キャパシタとによって共振回路が形成され、
前記腹部(AM1)は、前記共振回路の電流経路の中央に位置する、請求項5に記載のコイルユニット。 - 前記共鳴コイル(110)と電磁誘導結合する電磁誘導コイルをさらに備えた、請求項1に記載のコイルユニット。
- 請求項1から請求項8のいずれかに記載のコイルユニットを備えた車両であって、
前記共鳴コイル(110)の腹部(AM1)と前記車両の中心との間の距離は、前記第1巻回中心(O1)と前記車両の中心との間の距離よりも小さい、車両。 - 請求項1から請求項8のいずれかに記載のコイルユニットを備えた外部給電装置。
- 請求項9に記載の車両と、
請求項10に記載の外部給電装置と、
を備えた車両給電システム。
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US13/983,662 US9124126B2 (en) | 2011-03-11 | 2011-03-11 | Coil unit, power transmission device, external power feeding apparatus, and vehicle charging system |
CN2011800692153A CN103430258A (zh) | 2011-03-11 | 2011-03-11 | 线圈单元、输电装置、外部供电装置及车辆充电系统 |
EP20110861133 EP2685478A4 (en) | 2011-03-11 | 2011-03-11 | COIL UNIT, POWER TRANSMISSION DEVICE, EXTERNAL POWER SUPPLY DEVICE AND VEHICLE LOADING SYSTEM |
JP2013504426A JP5510608B2 (ja) | 2011-03-11 | 2011-03-11 | コイルユニット、車両、外部給電装置および車両充電システム |
PCT/JP2011/055813 WO2012124029A1 (ja) | 2011-03-11 | 2011-03-11 | コイルユニット、送電装置、外部給電装置および車両充電システム |
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EP (1) | EP2685478A4 (ja) |
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US20130335018A1 (en) | 2013-12-19 |
JP5510608B2 (ja) | 2014-06-04 |
EP2685478A4 (en) | 2014-09-10 |
CN103430258A (zh) | 2013-12-04 |
JPWO2012124029A1 (ja) | 2014-07-17 |
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US9124126B2 (en) | 2015-09-01 |
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