WO2012121184A1 - System for contactlessly supplying power to moving body - Google Patents

System for contactlessly supplying power to moving body Download PDF

Info

Publication number
WO2012121184A1
WO2012121184A1 PCT/JP2012/055495 JP2012055495W WO2012121184A1 WO 2012121184 A1 WO2012121184 A1 WO 2012121184A1 JP 2012055495 W JP2012055495 W JP 2012055495W WO 2012121184 A1 WO2012121184 A1 WO 2012121184A1
Authority
WO
WIPO (PCT)
Prior art keywords
power
side coil
magnetic field
coil
power transmission
Prior art date
Application number
PCT/JP2012/055495
Other languages
French (fr)
Japanese (ja)
Inventor
福田　浩司
Original Assignee
日本電気株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本電気株式会社 filed Critical 日本電気株式会社
Publication of WO2012121184A1 publication Critical patent/WO2012121184A1/en

Links

Images

Classifications

    • 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
    • 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
    • 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
    • B60L53/305—Communication interfaces
    • 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
    • B60L53/39—Means for automatic or assisted adjustment of the relative position of charging devices and vehicles specially adapted for charging by inductive energy transfer with position-responsive activation of primary coils
    • 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
    • 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
    • H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
    • 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
    • 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
    • B60L2210/30—AC to DC converters
    • 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
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/40—The network being an on-board power network, i.e. within a vehicle
    • H02J2310/48—The network being an on-board power network, i.e. within a vehicle for electric vehicles [EV] or hybrid vehicles [HEV]
    • 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
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • 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
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • 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
    • 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
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles

Definitions

  • the present invention relates to a non-contact power feeding system to a moving body, and more particularly to a power feeding system that supplies power in a non-contact manner by magnetic field coupling to the moving body.
  • the electric vehicle includes an electric motor that generates a driving force and a power storage device that can repeatedly store electric power to supply electric power to the electric motor.
  • a method is known in which power is supplied to a power storage device by using a power cable provided in a house or the like and using a charging cable. From the viewpoint of convenience and safety, it has been devised to supply power to the storage battery by non-contact power transmission using the magnetic field resonance phenomenon of the coil as in Non-Patent Document 1.
  • a power feeding method using an electromagnetic induction phenomenon as described in Patent Document 1 and Patent Document 2 has also been devised.
  • non-contact power transmission using a magnetic field resonance phenomenon or electromagnetic induction phenomenon alignment of a power transmission side coil and a power reception side coil is important in power transmission efficiency.
  • the influence of the relative position between the power transmission side coil and the power reception side coil is relatively small in contactless power transmission using the magnetic field resonance phenomenon.
  • the power transmission efficiency decreases when the relative position of the coil is greatly deviated. For this reason, when using non-contact power transmission as a power feeding device to a moving body, a mechanism for adjusting the position between the power receiving side coil and the power transmitting side coil is necessary.
  • JP 2010-98807 A Japanese Patent No. 4356844 Japanese Patent No. 4442517
  • Patent Document 1 describes a power feeding system that performs non-contact power feeding by aligning a moving device that includes a secondary coil that is electromagnetically coupled to a primary coil with respect to a power feeding device that includes a primary coil.
  • FIG. 5A is an overall view for explaining the configuration of the non-contact power feeding device of Patent Document 3, and FIG. 5B is a graph showing power feeding efficiency E.
  • the non-contact power feeding device of Patent Document 3 includes a primary coil 101, a control unit 100, a power supply circuit 101a, a communication unit 102, a power feeding state obtaining unit 103, a power feeding efficiency obtaining unit 104, a positioning unit 105, a motor 105a, and a retry instruction unit 106. It has.
  • the power supply state acquisition unit 103 includes an ammeter 103 a and a voltmeter 103 b that measure the current value and voltage value of the primary coil 101.
  • the moving device includes a secondary coil 111, a control unit 110, a power supply circuit 111a, a battery 111b, a communication unit 112, a power receiving state acquisition unit 113, and a traveling unit 114.
  • the power receiving state acquisition unit 113 includes an ammeter 113a and a voltmeter 113b that measure the current value and voltage value of the secondary coil 111.
  • the power supply efficiency acquisition means 104 calculates the electric power in each coil from the voltage value and current value of both the primary coil 101 and the secondary coil 111.
  • the power supply efficiency E is calculated from the power ratio thus calculated. As shown in FIG. 5B, the power supply efficiency E changes as indicated by a curve a.
  • the position where the curve a shows a peak is when the positions of the primary coil 101 and the secondary coil 111 coincide.
  • the power supply efficiency E is monitored, and the positional deviation between the primary coil 101 and the secondary coil 111 is corrected so that the power supply efficiency E reaches a peak. Yes.
  • the object of the present invention is to detect in which direction the central axis of the coil is shifted between the power transmission side coil and the power reception side coil, and to reduce the time required for alignment control of the central axis of the coil, and to contact the moving body It is to provide a power feeding system.
  • a non-contact power feeding system to a moving body supplies power from the power transmission side coil in a non-contact manner to a moving body including a power receiving side coil that is electromagnetically coupled to the power transmission side coil.
  • a contactless power feeding system to a moving body wherein the electromagnetic field intensity distribution generated by the power transmission side coil is detected at at least three positions around the power reception side coil, and the electromagnetic fields at the plurality of positions are detected. The positions of the power transmission side coil and the power reception side coil are adjusted so that the intensity values of the power transmission side coil and the power reception side coil coincide with each other.
  • the central axis of the coil is shifted in which direction the coil on the power transmission side and the coil on the power reception side are shifted from the intensity distribution of the electromagnetic field generated by the power transmission side coil detected at at least three positions around the coil on the power reception side. Can be detected.
  • position adjustment between the coils is necessary for trial and error, whereas in the present invention, correction amounts in the X direction and the Y direction are calculated by one measurement, and the position is corrected at a time. As a result, the time for alignment control of the central axis of the coil can be shortened.
  • FIG. 1 is an overall view showing a non-contact power feeding system to a moving body according to an embodiment of the present invention.
  • 2A is an explanatory diagram for explaining the arrangement of the power transmission side coil 11 and the magnetic field sensor unit 12 (12a, 12b, 12c) of FIG. 1
  • FIG. 2B is the power transmission side of the non-contact power feeding system of FIG. 5 is a flowchart for explaining an operation of aligning the central axes of a coil 21 and a power receiving coil 11.
  • FIG. 3 is an image diagram for explaining the positional relationship between the power reception side coil 11 and the magnetic field strength distribution generated by the power transmission side coil 21.
  • FIG. 4 is a conceptual diagram for generalizing and explaining the case where the sensor units are arranged in a circle at regular intervals.
  • FIG. 5A is an overall view for explaining the configuration of the non-contact power feeding device of Patent Document 3
  • FIG. 5B is a graph showing power feeding efficiency E.
  • FIG. 1 is an overall view showing a non-contact power feeding system to a moving body according to an embodiment of the present invention.
  • 2A is an explanatory diagram for explaining the positional relationship between the power transmission side coil 11 and the magnetic field sensor unit 12 of FIG. 1
  • FIG. 2B is a power transmission side coil 21 and a power reception side coil of the non-contact power feeding system of FIG. 11 is a flowchart for explaining an alignment operation of 11 central axes.
  • the power supply device 20 and the moving body 10 are each provided with a resonance coil.
  • the resonance coil of the power supply device 20 is referred to as a power transmission side coil 21, and the resonance coil of the mobile body 10 is referred to as a power reception side coil 11.
  • the contactless power supply system of the present embodiment includes a power supply device 20 and a moving body 10 that receives power supply from the power supply device 20 in a contactless manner.
  • the power feeding device 20 includes a power transmission side coil 21, a coil position control device 23, an AC power supply 25, a transmitted power adjustment device 24, and a communication device 22.
  • the power feeding device 20 generates an electromagnetic wave having a frequency that flows from the AC power supply 25 and the transmission power adjustment device 24 to the power transmission side coil 21.
  • the transmission power adjustment device 24 adjusts the magnitude, frequency, and the like of the power sent to the power transmission side coil 21 based on the signal obtained from the communication device 22.
  • the coil position control device 23 adjusts the position of the power transmission side coil 21 based on the communication signal from the communication device 16 of the moving body 10. At this time, the position of the power transmission side coil 21 can be adjusted by adjusting the position of the power supply device 20 itself without changing the relative position between the power transmission side coil 21 and the power supply device 20. Alternatively, the relative position between the power transmission side coil 21 and the power reception side coil 11 can be adjusted by adjusting the position of the moving body 10.
  • the moving body 10 includes a power receiving coil 11, a magnetic field sensor unit 12, a power storage mechanism 13, an electromagnetic field distribution calculation microcomputer 14, a system / communication control microcomputer 15, and a communication device 16. Further, the electromagnetic field distribution calculation microcomputer and the system / communication control microcomputer may function as both in one microcomputer.
  • a magnetic field sensor unit 12 is disposed around the power receiving side coil 11 of the moving body 10. In the present embodiment, as shown in FIG. 2A, the three magnetic field sensor units 12 a, 12 b, and 12 c are arranged around the power receiving side coil 11 so as to be at the apex of an equilateral triangle. In FIG. 2A, the positions of the magnetic field sensor units 12a, 12b, and 12c are indicated by black squares.
  • the power storage mechanism 13 of the moving body 10 rectifies the AC power obtained by the resonance coil 11 and stores it as power in the storage battery. Information such as the magnitude of the obtained power is sent from the power storage mechanism 13 to the system / communication control microcomputer 15.
  • the electromagnetic field distribution calculation microcomputer 14 calculates magnetic field information obtained from the three magnetic field sensor units 12 arranged around the power receiving coil 11. Further, the electromagnetic field distribution calculation microcomputer 14 sends the calculated electromagnetic field distribution information to the system / communication control microcomputer 15. From the obtained information, the system / communication control microcomputer 15 communicates the position control of the moving body 10 for positioning the resonance coils, the position control of the power supply device 20, and the exchange of information on the power transmission efficiency with the power supply device 20. This is done via the device 16.
  • a pilot signal is emitted from the communication device 16 of the mobile body 10 or the communication device 22 of the power feeding device 20.
  • the communication device 22 of the power feeding device 20 or the communication device 16 of the moving body 10 detects the released pilot signal, it detects that the power feeding device 20 and the moving body 10 have approached.
  • the resonance frequency of the two resonance coils is adjusted by the power transmission adjustment device 24 from the AC power supply 25 of the power supply device 20, and a magnetic field is generated from the power transmission side coil 21. generate. It is not necessary to use a magnetic field at the resonance frequency at the time of position detection.
  • the magnetic field is measured by the three magnetic field sensor units 12a, 12b, and 12c in step S1.
  • the magnetic field sensor units 12a, 12b, and 12c measure a magnetic field in a direction parallel to the central axis of the power transmission side coil 21 at the position where the magnetic field sensor units 12a, 12b, and 12c are arranged.
  • step S2 it is confirmed whether or not the three measured magnetic field strength values match within an allowable error range.
  • the allowable error is an allowable value of an error due to a magnetic field disturbance due to a surrounding structure or a measurement error.
  • the three magnetic field strength values match, it is determined that the central axis of the power transmission side coil 21 and the central axis of the power reception side coil 11 are aligned, and there is no positional deviation.
  • Power is transmitted to the power receiving side coil 11 that is electromagnetically coupled to the coil 21 in a non-contact manner. When there is no displacement, the maximum power transmission efficiency is obtained.
  • the power transmitted to the power receiving side coil 11 is sent to the power storage mechanism 13 of the moving body 10 and stored.
  • the accumulated electric power is supplied to an electric motor in the moving body 10.
  • step S2 When the measured three magnetic field strength values do not match in step S2, it is considered that the position of the central axis of the power transmission side coil 21 and the central axis of the power reception side coil 11 is shifted, and the system is determined in step S3.
  • the communication control microcomputer 15 calculates the movement amount. Based on the calculated movement amount, the system / communication control microcomputer 15 adjusts the position of the power transmission side coil 21 of the power supply apparatus 20 via the communication apparatus 16 in step S4. Alternatively, the position of the power feeding device 20 itself is adjusted without changing the relative position between the power transmission side coil 21 and the power feeding device 20. When the power feeding device 20 is moved, information on the positional deviation of the central axis is transmitted to the coil position control device through the communication device 16 and the power feeding device 20 is moved.
  • step S1 the magnetic field is measured by the three magnetic field sensor units 12a, 12b, and 12c.
  • step S2 it is confirmed whether or not the three measured magnetic field strength values match.
  • the alignment between the power transmission side coil 21 and the power reception side coil 11 is ideally completed by one movement. If necessary, the coefficient for calculating the movement amount is corrected and calculated again. Also, if there is no match after several trials, it informs you that there is an abnormality in the system and the surrounding environment.
  • the magnetic field sensor unit When the magnetic field intensity distribution is a pattern that decreases substantially monotonously from the central axis of the power supply side coil 22, the magnetic field sensor unit is arranged around the power reception side coil 11 so as to be at the apex of an equilateral triangle. The deviation of the central axis of the coil can be detected from the magnetic field strength distribution. The tendency of the magnetic field distribution is the same even when the resonance frequency is not used.
  • the movement amount in step S3 is, for example, the movement amount ⁇ x in the x direction is a ⁇ (F1 ⁇ F2) ⁇ sin 30 °, and the movement amount ⁇ y in the y direction is calculated by a ⁇ (F1 ⁇ (F2 + F3) ⁇ cos30 °).
  • a is a certain proportional constant
  • F1, F2, and F3 are the magnetic field intensity values detected by the magnetic field sensor units 12a, 12b, and 12c, respectively
  • the angle is a plane coordinate system centered on the center of each sensor unit.
  • the angles when the angular position of F3 can be represented by 90 °, 210 °, and 330 ° are shown.
  • the magnetic field sensor 12 that measures the central axis of the power transmission side coil 21 and the central axis of the power reception side coil 11 around the power reception side coil 11 measures.
  • the alignment can be based on the intensity value.
  • information on the magnetic field distribution is obtained from the three magnetic field sensor units 12a, 12b, and 12c, thereby grasping in which direction the central axes of the coils are shifted from each other, thereby eliminating the positional shift of the central axes.
  • the position of the coil can be adjusted.
  • the present invention is not limited to this.
  • the magnetic field sensor unit 12 has been described in the case where the magnetic field sensor unit 12 is arranged around the power receiving side coil 11 so as to be located at the apex of an equilateral triangle. It is also possible to arrange them so that they are at the positions of the vertices. Considering the magnetic field intensity distribution generated by the power transmission side coil 21 and the positional relationship between the magnetic field sensor units 12, the power value measured by the magnetic field sensor unit 12 is corrected, and the power transmission side coil is matched so that the corrected intensity values match. What is necessary is just to adjust the position of 21 and the power receiving side coil 11. FIG.
  • the minimum number of sensor units that can determine the amount of movement ⁇ x in the x direction and the amount of movement ⁇ y in the y direction is three, and four or more magnetic field sensor units 12 are arranged around the power receiving side coil 11.
  • the magnetic field strength value may be detected.
  • FIG. 4 is a conceptual diagram for generalizing and explaining the case where the sensor units are arranged in a circle at regular intervals.
  • the amount of movement ⁇ x in the x direction is And the amount of movement ⁇ y in the y direction is Is calculated by
  • a is a proportional constant
  • Fi (x, y) is a magnetic field strength value measured by the sensor unit at each position.
  • the angle ⁇ n is The angle determined by the number n of sensor units to be arranged.
  • the movement amount ⁇ x in the x direction and the movement amount ⁇ y in the y direction are calculated. Based on this, it is sufficient to move.
  • an electric field sensor can be used instead of the magnetic field sensor. When detecting the electric field, it is preferable to look at the magnetic field component in the axial direction of the resonance coil, in which the influence of the current excited in the power receiving coil 11 is difficult to see.
  • an electric field sensor and a magnetic field sensor it is possible to use an optical electric field probe (EO probe) and an optical magnetic field probe (MO probe) that are less invasive to surrounding electromagnetic fields.
  • the EO probe uses an electro-optic crystal
  • the MO probe uses a magneto-optic crystal.
  • the positioning of the power transmission side coil 21 and the power reception side coil 11 according to the embodiment of the present invention described above is performed by detecting the pilot signal from the communication device 16 of the mobile body 10 or the communication device 22 of the power feeding device 20. And the power feeding device 20 is approached. Coarse alignment between the moving body 10 and the power feeding device 20 can use wireless communication by such a communication device.
  • the moving body 10 is an electric vehicle
  • This rough alignment may be as accurate as entering the garage by current level drivers.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Current-Collector Devices For Electrically Propelled Vehicles (AREA)

Abstract

Provided is a system for contactlessly supplying power to a moving body, capable of detecting which direction the center axes of a power transmission side coil and a power reception side coil are shifted from each other and reducing the time required for controlling the alignment of the center axes of the coils. The magnetic field intensity distribution generated by the power transmission side coil is detected at multiple positions around the power reception side coil, and the positions of the power transmission side coil and the power reception side coil are adjusted so that the magnetic field intensity values at the multiple positions match each other.

Description

移動体への非接触給電システムContactless power supply system for moving objects
　本発明は、移動体への非接触給電システムに関し、特に移動体への磁界結合により非接触で電力を供給する給電システムに関する。 The present invention relates to a non-contact power feeding system to a moving body, and more particularly to a power feeding system that supplies power in a non-contact manner by magnetic field coupling to the moving body.
　持続可能な社会の構築のために、ガソリンを駆動力として用いた移動体から、環境への負荷が配慮された電気自動車などの電気を駆動力として用いる移動体への移行が検討されている。電気自動車は、駆動力を発生させる電動機と、電動機への電力の供給するために繰り返し電力を蓄えておくことができる蓄電装置を備えている。蓄電装置への電力への供給は、家屋などに備え付けられてある電源コンセントを利用し、充電ケーブルを利用して行う方法が知られている。
　利便性や安全性の観点から、非特許文献１にあるようなコイルの磁界共鳴現象を用い、非接触な電力伝送により蓄電池へ電力供給することが考案されている。特許文献１や特許文献２にあるような電磁誘導現象を用いた給電方法も考案されている。
　磁界共鳴現象や電磁誘導現象を用いた非接触電力伝送において、送電側のコイルと受電側のコイルの位置合わせが電力伝送効率において重要である。送電側コイルと受電側コイルとの相対位置の影響が比較的少ないのが、磁界共鳴現象を用いた非接触電力伝送である。ただし、磁界共鳴現象においてもコイルの相対位置が大きくずれてくると電力伝送効率は落ちてくる。このため、移動体への給電装置として非接触電力伝送を用いるときには、受電側コイルと送電側コイルと間の位置を調整する機構が必要である。 In order to build a sustainable society, the transition from a moving body that uses gasoline as a driving force to a moving body that uses electricity as a driving force, such as an electric vehicle that takes environmental loads into consideration, is being studied. The electric vehicle includes an electric motor that generates a driving force and a power storage device that can repeatedly store electric power to supply electric power to the electric motor. A method is known in which power is supplied to a power storage device by using a power cable provided in a house or the like and using a charging cable.
From the viewpoint of convenience and safety, it has been devised to supply power to the storage battery by non-contact power transmission using the magnetic field resonance phenomenon of the coil as in Non-Patent Document 1. A power feeding method using an electromagnetic induction phenomenon as described in Patent Document 1 and Patent Document 2 has also been devised.
In non-contact power transmission using a magnetic field resonance phenomenon or electromagnetic induction phenomenon, alignment of a power transmission side coil and a power reception side coil is important in power transmission efficiency. The influence of the relative position between the power transmission side coil and the power reception side coil is relatively small in contactless power transmission using the magnetic field resonance phenomenon. However, even in the magnetic field resonance phenomenon, the power transmission efficiency decreases when the relative position of the coil is greatly deviated. For this reason, when using non-contact power transmission as a power feeding device to a moving body, a mechanism for adjusting the position between the power receiving side coil and the power transmitting side coil is necessary.
特開２０１０−９８８０７号公報JP 2010-98807 A 特許４３５６８４４号公報Japanese Patent No. 4356844 特許４４４２５１７号公報Japanese Patent No. 4442517
　しかしながら、上述した非特許文献１、特許文献１及び特許文献２に記載された背景技術には、以下のような課題がある。すなわち、送電側コイルと受電側コイルとがどの方向にコイルの中心軸がずれているかは分からない。このため、コイルの中心軸の位置合わせをする制御に時間がかかってしまう。また、送受電環境に異常がある場合、コイルの位置合わせに不具合が生じてしまう可能性がある。
　特許文献３には、一次コイルを備える給電装置に対し、一次コイルに電磁結合する二次コイルを備える移動装置を位置合わせして、非接触給電を行う給電システムが記載されている。図５Ａは特許文献３の非接触給電装置の構成を説明するための全体図であり、図５Ｂは給電効率Ｅを示すグラフである。特許文献３の非接触給電装置は、一次コイル１０１、制御手段１００、電源回路１０１ａ、通信手段１０２、給電状態取得手段１０３、給電効率取得手段１０４、位置決め手段１０５、モータ１０５ａ、及びリトライ指示手段１０６を備えている。給電状態取得手段１０３は、一次コイル１０１の電流値及び電圧値を計測する電流計１０３ａと電圧計１０３ｂを備えている。移動装置は、二次コイル１１１、制御手段１１０、電源回路１１１ａ、バッテリ１１１ｂ、通信手段１１２、受電状態取得手段１１３、走行手段１１４を備えている。受電状態取得手段１１３は、二次コイル１１１の電流値及び電圧値を計測する電流計１１３ａと電圧計１１３ｂを備えている。
　給電効率取得手段１０４は、一次コイル１０１、二次コイル１１１の双方の電圧値と電流値からそれぞれのコイルにおける電力を計算する。こうして計算された電力の比から、給電効率Ｅを算出する。図５Ｂに示すように、給電効率Ｅは曲線ａのように変化する。曲線ａがピークを示す位置は、一次コイル１０１と二次コイル１１１との位置が一致したときである。特許文献３の給電システムでは、給電効率Ｅを監視し、給電効率Ｅがピークを示す位置となるように、一次コイル１０１と二次コイル１１１との間の位置ずれを補正することが記載されている。
　しかしながら、特許文献３の非接触給電装置でも、一次コイル１０１と二次コイル１１１とがどの方向にコイルの中心軸がずれているのかは分からない。このため、コイルの中心軸の位置合わせをする制御に時間がかかってしまう。
　本発明の目的は、送電側コイルと受電側コイルとがどの方向にコイルの中心軸がずれているかを検出でき、コイルの中心軸の位置合わせ制御の時間を短縮できる、移動体への非接触給電システムを提供することにある。 However, the background techniques described in Non-Patent Document 1, Patent Document 1, and Patent Document 2 described above have the following problems. That is, it is not known in which direction the central axis of the coil is shifted between the power transmission side coil and the power reception side coil. For this reason, it takes time to control the alignment of the central axis of the coil. In addition, when there is an abnormality in the power transmission / reception environment, there is a possibility that a problem occurs in the coil alignment.
Patent Document 3 describes a power feeding system that performs non-contact power feeding by aligning a moving device that includes a secondary coil that is electromagnetically coupled to a primary coil with respect to a power feeding device that includes a primary coil. FIG. 5A is an overall view for explaining the configuration of the non-contact power feeding device of Patent Document 3, and FIG. 5B is a graph showing power feeding efficiency E. The non-contact power feeding device of Patent Document 3 includes a primary coil 101, a control unit 100, a power supply circuit 101a, a communication unit 102, a power feeding state obtaining unit 103, a power feeding efficiency obtaining unit 104, a positioning unit 105, a motor 105a, and a retry instruction unit 106. It has. The power supply state acquisition unit 103 includes an ammeter 103 a and a voltmeter 103 b that measure the current value and voltage value of the primary coil 101. The moving device includes a secondary coil 111, a control unit 110, a power supply circuit 111a, a battery 111b, a communication unit 112, a power receiving state acquisition unit 113, and a traveling unit 114. The power receiving state acquisition unit 113 includes an ammeter 113a and a voltmeter 113b that measure the current value and voltage value of the secondary coil 111.
The power supply efficiency acquisition means 104 calculates the electric power in each coil from the voltage value and current value of both the primary coil 101 and the secondary coil 111. The power supply efficiency E is calculated from the power ratio thus calculated. As shown in FIG. 5B, the power supply efficiency E changes as indicated by a curve a. The position where the curve a shows a peak is when the positions of the primary coil 101 and the secondary coil 111 coincide. In the power supply system of Patent Document 3, it is described that the power supply efficiency E is monitored, and the positional deviation between the primary coil 101 and the secondary coil 111 is corrected so that the power supply efficiency E reaches a peak. Yes.
However, even in the non-contact power feeding device of Patent Document 3, it is not known in which direction the central axis of the coil is shifted between the primary coil 101 and the secondary coil 111. For this reason, it takes time to control the alignment of the central axis of the coil.
The object of the present invention is to detect in which direction the central axis of the coil is shifted between the power transmission side coil and the power reception side coil, and to reduce the time required for alignment control of the central axis of the coil, and to contact the moving body It is to provide a power feeding system.
　前記目的を達成するため、本発明に係る移動体への非接触給電システムは、送電側コイルと電磁結合する受電側コイルを備える移動体へ、上記送電側コイルから非接触で電力を供給する、移動体への非接触給電システムであって、上記受電側コイルの周囲の少なくとも３つの位置で、上記送電側コイルが発生させた電磁界の強度分布を検出し、上記複数の位置での電磁界の強度値が一致するように上記送電側コイルと上記受電側コイルとの位置を調整することを特徴とする。 To achieve the above object, a non-contact power feeding system to a moving body according to the present invention supplies power from the power transmission side coil in a non-contact manner to a moving body including a power receiving side coil that is electromagnetically coupled to the power transmission side coil. A contactless power feeding system to a moving body, wherein the electromagnetic field intensity distribution generated by the power transmission side coil is detected at at least three positions around the power reception side coil, and the electromagnetic fields at the plurality of positions are detected. The positions of the power transmission side coil and the power reception side coil are adjusted so that the intensity values of the power transmission side coil and the power reception side coil coincide with each other.
　本発明は、受電側コイルの周囲の少なくとも３つの位置で検出した、送電側コイルが発生させた電磁界の強度分布から、送電側コイルと受電側コイルとがどの方向にコイルの中心軸がずれているかを検出できる。特許文献３では位置合わせに試行錯誤のコイル間の位置移動が必要であるのに対して、本発明ではＸ方向、Ｙ方向の補正量を一度の測定によってそれぞれ算出して、一度に位置補正することによりコイルの中心軸の位置合わせ制御の時間を短縮できる。 In the present invention, the central axis of the coil is shifted in which direction the coil on the power transmission side and the coil on the power reception side are shifted from the intensity distribution of the electromagnetic field generated by the power transmission side coil detected at at least three positions around the coil on the power reception side. Can be detected. In Patent Document 3, position adjustment between the coils is necessary for trial and error, whereas in the present invention, correction amounts in the X direction and the Y direction are calculated by one measurement, and the position is corrected at a time. As a result, the time for alignment control of the central axis of the coil can be shortened.
図１は、本発明の一実施形態による、移動体への非接触給電システムを示す全体図である。FIG. 1 is an overall view showing a non-contact power feeding system to a moving body according to an embodiment of the present invention. 図２Ａは、図１の送電側コイル１１と磁界センサ部１２（１２ａ、１２ｂ、１２ｃ）との配置を説明するための説明図であり、図２Ｂは、図１の非接触給電システムの送電側コイル２１と受電側コイル１１の中心軸の位置合わせ動作を説明するためのフローチャートである。2A is an explanatory diagram for explaining the arrangement of the power transmission side coil 11 and the magnetic field sensor unit 12 (12a, 12b, 12c) of FIG. 1, and FIG. 2B is the power transmission side of the non-contact power feeding system of FIG. 5 is a flowchart for explaining an operation of aligning the central axes of a coil 21 and a power receiving coil 11. 図３は、受電側コイル１１と、送電側コイル２１が発生させる磁界強度分布との位置関係を説明するためのイメージ図である。FIG. 3 is an image diagram for explaining the positional relationship between the power reception side coil 11 and the magnetic field strength distribution generated by the power transmission side coil 21. 図４は、円状に一定間隔でセンサ部を配置した場合を一般化して説明するための概念図である。FIG. 4 is a conceptual diagram for generalizing and explaining the case where the sensor units are arranged in a circle at regular intervals. 図５Ａは特許文献３の非接触給電装置の構成を説明するための全体図であり、図５Ｂは給電効率Ｅを示すグラフである。FIG. 5A is an overall view for explaining the configuration of the non-contact power feeding device of Patent Document 3, and FIG. 5B is a graph showing power feeding efficiency E.
　本発明の一実施形態による、移動体への非接触給電システムについて、図面を参照して詳細に説明する。図１は、本発明の一実施形態による、移動体への非接触給電システムを示す全体図である。図２Ａは、図１の送電側コイル１１と磁界センサ部１２との位置関係を説明するための説明図であり、図２Ｂは、図１の非接触給電システムの送電側コイル２１と受電側コイル１１の中心軸の位置合わせ動作を説明するためのフローチャートである。
　給電装置２０と移動体１０にはそれぞれ共振コイルが設けられており、給電装置２０の共振コイルを送電側コイル２１、移動体１０の共振コイルを受電側コイル１１と呼ぶことにする。
　本実施形態の非接触給電システムは、給電装置２０と、給電装置２０から非接触にて電力供給を受ける移動体１０とを備える。給電装置２０は、送電側コイル２１、コイル位置制御装置２３、交流電源２５、送電電力調整装置２４、通信装置２２を備える。給電装置２０では、交流電源２５、送電電力調整装置２４から送電側コイル２１に流す周波数の電磁波を発生させる。送電電力調整装置２４は、通信装置２２から得られた信号を元に送電側コイル２１に送る電力の大きさや周波数などを調整する。コイル位置制御装置２３は、移動体１０の通信装置１６からの通信信号をもとに、送電側コイル２１の位置を調整する。このとき、送電側コイル２１と給電装置２０との相対位置を変えないで、給電装置２０自体の位置を調整することにより、送電側コイル２１の位置を調整することもできる。また或いは、移動体１０の位置を調整することにより、送電側コイル２１と受電側コイル１１との相対位置を調整することもできる。
　移動体１０は、受電側コイル１１、磁界センサ部１２、電力蓄積機構１３、電磁界分布計算用マイコン１４、システム・通信制御用マイコン１５、通信装置１６を備える。また、電磁界分布計算用マイコンとシステム・通信制御用マイコンとは、１つのマイコンで両方の機能を兼ねていても良い。移動体１０の受電側コイル１１の周囲には、磁界センサ部１２が配置されている。本実施形態では、図２Ａに示すように、３つの磁界センサ部１２ａ、１２ｂ、１２ｃが受電側コイル１１の周囲に正三角形の頂点の位置になるように、配置されている。図２Ａでは、磁界センサ部１２ａ、１２ｂ、１２ｃの位置は黒い四角で示している。
　移動体１０の電力蓄積機構１３は、共振コイル１１で得た交流電力を整流して蓄電池に電力として蓄える。得られた電力の大きさ等の情報は、電力蓄積機構１３からシステム・通信制御用マイコン１５に送られる。電磁界分布計算用マイコン１４は、受電側コイル１１の周囲に配置した３つの磁界センサ部１２から得た磁界の情報を計算する。さらに、電磁界分布計算用マイコン１４は、計算した電磁界分布の情報をシステム・通信制御用マイコン１５に送る。システム・通信制御用マイコン１５は得られた情報から、共振コイル同士の位置合わせのための移動体１０の位置制御や給電装置２０の位置制御や送電効率の情報の給電装置２０とのやり取りを通信装置１６を介して行う。
　次に、本実施形態による非接触給電システムの動作について説明する。初めに、移動体１０の通信装置１６或いは給電装置２０の通信装置２２からパイロット信号が放出される。放出されたパイロット信号を給電装置２０の通信装置２２或いは移動体１０の通信装置１６が検出することによって、給電装置２０と移動体１０とが接近したことを検出する。
　給電装置２０と移動体１０との接近の検出の後、給電装置２０の交流電源２５から送電力調整装置２４によって２つの共振コイルの共鳴周波数の周波数などが調整され、送電側コイル２１から磁界を発生させる。なお、位置検出時には共鳴周波数の磁場ではなくても良く、共鳴周波数の磁場とずらすことによって受電側で励起される電流が減り、検出される磁界分布の精度が上がるが、便宜を考慮し検出用の磁場の周波数を選ぶことができる。
　本実施形態では、図２Ｂのフローチャートに示すように、ステップＳ１で３つの磁界センサ部１２ａ、１２ｂ、１２ｃで磁界を測定する。ここで、磁界センサ部１２ａ、１２ｂ、１２ｃは、磁界センサ部１２ａ、１２ｂ、１２ｃが配置された位置で、送電側コイル２１の中心軸と平行な方向の磁界を測定するものとする。次に、ステップＳ２で、測定された３つの磁界強度値が許容誤差範囲内で一致しているかどうか確認する。許容誤差とは、周囲の構造物による磁場の乱れや測定誤差による誤差の許容値である。３つの磁界強度値が一致しているときは、送電側コイル２１の中心軸と受電側コイル１１の中心軸とが揃っており、位置ずれがないと判断し、送電側コイル２１から、送電側コイル２１に非接触で電磁結合する受電側コイル１１に送電する。位置ずれがないとき、最大の電力伝送効率が得られる。受電側コイル１１に送電された電力は移動体１０の電力蓄積機構１３に送られ蓄積される。蓄積された電力は、移動体１０内の電動機などへ供給される。
　ステップＳ２で、測定された３つの磁界強度値が一致していないときは、送電側コイル２１の中心軸と受電側コイル１１の中心軸との位置がずれているとみなして、ステップＳ３でシステム・通信制御用マイコン１５が移動量を算出する。算出された移動量に基づき、ステップＳ４でシステム・通信制御用マイコン１５が通信装置１６を介して、給電装置２０の送電側コイル２１の位置を調整する。或いは、送電側コイル２１と給電装置２０との相対位置を変えないで、給電装置２０自体の位置を調整する。
　給電装置２０を動かすときには、中心軸の位置ずれの情報を、通信装置１６を通じてコイル位置制御装置に伝え、給電装置２０を移動させる。もし、給電装置２０を動かすのではなく、移動体１０を動かすことにより送電側コイル２１と受電側コイル１１との相対位置を調整するときは、システム・通信制御用マイコン１５によって移動体１０の駆動部を動作させる。
　改めて、ステップＳ１で３つの磁界センサ部１２ａ、１２ｂ、１２ｃで磁界を測定する。次に、ステップＳ２で、測定された３つの磁界強度値が一致しているかどうか確認する。送電側コイル２１と受電側コイル１１との位置合わせは、理想的には１回の移動で完了する。必要があれば移動量を算出する際の係数を補正し、再度算出する。また、数回の試行によっても一致しないときはシステムや周囲環境に異常があることを知らせる。３つの磁界強度値が一致しているときは、送電側コイル２１の中心軸と受電側コイル１１の中心軸とが揃っており、位置ずれがないと判断し、送電側コイル２１から、送電側コイル２１に非接触で電磁結合する受電側コイル１１へ向けて、送電する。
　図３は、左から受電側コイル１１の位置は一定として、共振コイル１１に共振周波数で磁界を励起したときの、２つの共振コイルの中心軸が一致しているとき、２つの共振コイルの中心軸がｘ方向にコイル半径だけずれているとき、２つの共振コイルの中心軸がｙ方向にコイルの半径だけずれているときの磁界のＸＹ合成成分の強度を電磁界シミュレーションにより示すイメージ図である。図３で見て分かるとおり、磁界強度分布は受電側コイル１１の位置によらず、一定の分布を保っている。磁界強度分布が給電側コイル２２の中心軸から、ほぼ単調に減少していくパターンであるとき、受電側コイル１１の周囲に正三角形の頂点の位置になるように磁界センサ部を配置することによって、磁界強度分布からコイルの中心軸のずれを検出することができる。なお、磁界分布の傾向は共振周波数でない場合でも同様である。
　磁界センサ部１２ａ、１２ｂ、１２ｃが受電側コイル１１の周囲に正三角形の頂点位置になるように配置した場合には、ステップＳ３での移動量は、例えば、ｘ方向の移動量Δｘはａ×（Ｆ１−Ｆ２）×ｓｉｎ３０°、ｙ方向の移動量Δｙはａ×（Ｆ１−（Ｆ２＋Ｆ３）×ｃｏｓ３０°）で算出する。ここで、ａはある比例定数、Ｆ１、Ｆ２、Ｆ３はそれぞれ磁界センサ部１２ａ、１２ｂ、１２ｃが検出した磁界強度値、角度は各センサ部の中心を中心とする平面座標系でＦ１、Ｆ２、Ｆ３の角度位置がそれぞれ９０°、２１０°、３３０°で表せるときの角度を示す。
　本実施形態の、移動体への非接触給電システムでは、送電側コイル２１の中心軸と受電側コイル１１の中心軸とを、受電側コイル１１の周囲に配置した磁界センサ部１２が測定する磁界強度値に基づき位置合わせすることができる。また、その際、３つの磁界センサ部１２ａ、１２ｂ、１２ｃから磁界分布の情報を得て、これによりどの方向にコイルの中心軸同士がずれているのか把握して、中心軸の位置ずれをなくすようにコイルの位置を調整することができる。よって、送電側コイル２１と受電側コイル１１とがどの方向にコイルの中心軸がずれているかを検出でき、コイルの中心軸の位置合わせ制御の時間を短縮することができる。
　以上のシステムを用いることにより、コイル間のずれの位置を精度よく簡便に知ることが可能になり早急で確実なコイルの軸合わせが可能になる。また、送受信する周波数が分かっていれば、発生する磁界分布も計算可能であり、送受信コイル間に異常物質が存在すれば磁界分布に異常が発生するので、送受信の効率の変化と磁界分布の異常の検知により直ちに、電力の送受信を中止することによって安全性を確保することも可能になる。
　以上好ましい実施形態について説明したが、本発明はこれに限定されるものではない。例えば、上記実施形態では、磁界センサ部１２を、受電側コイル１１の周囲に正三角形の頂点の位置になるように配置した場合で説明したが、正三角形ではなく、二等辺三角形や直角三角形の頂点の位置になるように配置することも考えられる。送電側コイル２１が発生させる磁界強度分布と磁界センサ部１２同士の位置関係とを考慮して、磁界センサ部１２が測定した強度値を補正し、補正した強度値が一致するように送電側コイル２１と受電側コイル１１との位置を調整すればよい。
　また、ｘ方向の移動量Δｘ及びｙ方向の移動量Δｙを決定できる、センサ部を配置する最小個数は３つであり、磁界センサ部１２を受電側コイル１１の周囲に４つ以上配置して、磁界強度値を検出するようにしてもよい。図４は、円状に一定間隔でセンサ部を配置した場合を一般化して説明するための概念図である。配置された各センサ部の中心Ｐ（ｘ，ｙ）から見て、円状に一定間隔でセンサ部を配置したときには、ｘ方向の移動量Δｘは
Figure JPOXMLDOC01-appb-I000001
で算出され、ｙ方向の移動量Δｙは
Figure JPOXMLDOC01-appb-I000002
で算出される。ここで、ａは比例定数、Ｆｉ（ｘ，ｙ）は各位置のセンサ部が測定した磁界強度値を示す。角度θｎは
Figure JPOXMLDOC01-appb-I000003
で表される、配置するセンサ部の個数ｎで決まる角度である。各位置のセンサ部の磁界強度値Ｆ１（ｘ，ｙ）、Ｆ２（ｘ，ｙ）、Ｆ３（ｘ，ｙ）、…、Ｆｎ（ｘ，ｙ）と、配置する個数ｎと、比例定数ａとで、ｘ方向の移動量Δｘ及びｙ方向の移動量Δｙが算出される。これに基づき、移動すればよい。
　なお、磁界と電界とは相互に関係しているので、磁界センサの代わりに電界センサを用いることも可能である。電界を検出するときには受電側コイル１１に励起された電流の影響が見えにくい、共振コイルの軸方向の磁界成分を見ることが好ましい。また、電界センサ、磁界センサとして、周囲の電磁界に対して低侵襲な光電界プローブ（ＥＯプローブ）、光磁界プローブ（ＭＯプローブ）を用いることも可能である。ＥＯプローブは電気光学結晶を用いており、ＭＯプローブは磁気光学結晶を用いている。
　以上説明した本発明の実施形態の送電側コイル２１と受電側コイル１１との位置合わせは、移動体１０の通信装置１６或いは給電装置２０の通信装置２２からのパイロット信号の検出により、移動体１０と給電装置２０とが接近したものとして、開始される。移動体１０と給電装置２０との粗い位置合わせは、このような通信装置による無線通信を用いることができる。また、移動体１０が電気自動車である場合、電気自動車の運転手自身の運転によりある程度の位置合わせを行うことが考えられる。粗く位置合わせが完了したときに、音声や光などで運転手に通達することが考えられる。この粗い位置合わせは、現行水準の運転手による車庫入れ程度の精度でよい。
　以上、好ましい実施形態を参照して本願発明を説明したが、本願発明は上記実施形態に限定されものではない。本願発明の構成や詳細には、本願発明のスコープ内で当業者が理解し得る様々な変更をすることができる。
　この出願は、２０１１年３月１０日に出願された日本出願特願２０１１−５２８２０号を基礎とする優先権を主張し、その開示の全てをここに取り込む。 A non-contact power feeding system to a moving body according to an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is an overall view showing a non-contact power feeding system to a moving body according to an embodiment of the present invention. 2A is an explanatory diagram for explaining the positional relationship between the power transmission side coil 11 and the magnetic field sensor unit 12 of FIG. 1, and FIG. 2B is a power transmission side coil 21 and a power reception side coil of the non-contact power feeding system of FIG. 11 is a flowchart for explaining an alignment operation of 11 central axes.
The power supply device 20 and the moving body 10 are each provided with a resonance coil. The resonance coil of the power supply device 20 is referred to as a power transmission side coil 21, and the resonance coil of the mobile body 10 is referred to as a power reception side coil 11.
The contactless power supply system of the present embodiment includes a power supply device 20 and a moving body 10 that receives power supply from the power supply device 20 in a contactless manner. The power feeding device 20 includes a power transmission side coil 21, a coil position control device 23, an AC power supply 25, a transmitted power adjustment device 24, and a communication device 22. The power feeding device 20 generates an electromagnetic wave having a frequency that flows from the AC power supply 25 and the transmission power adjustment device 24 to the power transmission side coil 21. The transmission power adjustment device 24 adjusts the magnitude, frequency, and the like of the power sent to the power transmission side coil 21 based on the signal obtained from the communication device 22. The coil position control device 23 adjusts the position of the power transmission side coil 21 based on the communication signal from the communication device 16 of the moving body 10. At this time, the position of the power transmission side coil 21 can be adjusted by adjusting the position of the power supply device 20 itself without changing the relative position between the power transmission side coil 21 and the power supply device 20. Alternatively, the relative position between the power transmission side coil 21 and the power reception side coil 11 can be adjusted by adjusting the position of the moving body 10.
The moving body 10 includes a power receiving coil 11, a magnetic field sensor unit 12, a power storage mechanism 13, an electromagnetic field distribution calculation microcomputer 14, a system / communication control microcomputer 15, and a communication device 16. Further, the electromagnetic field distribution calculation microcomputer and the system / communication control microcomputer may function as both in one microcomputer. A magnetic field sensor unit 12 is disposed around the power receiving side coil 11 of the moving body 10. In the present embodiment, as shown in FIG. 2A, the three magnetic field sensor units 12 a, 12 b, and 12 c are arranged around the power receiving side coil 11 so as to be at the apex of an equilateral triangle. In FIG. 2A, the positions of the magnetic field sensor units 12a, 12b, and 12c are indicated by black squares.
The power storage mechanism 13 of the moving body 10 rectifies the AC power obtained by the resonance coil 11 and stores it as power in the storage battery. Information such as the magnitude of the obtained power is sent from the power storage mechanism 13 to the system / communication control microcomputer 15. The electromagnetic field distribution calculation microcomputer 14 calculates magnetic field information obtained from the three magnetic field sensor units 12 arranged around the power receiving coil 11. Further, the electromagnetic field distribution calculation microcomputer 14 sends the calculated electromagnetic field distribution information to the system / communication control microcomputer 15. From the obtained information, the system / communication control microcomputer 15 communicates the position control of the moving body 10 for positioning the resonance coils, the position control of the power supply device 20, and the exchange of information on the power transmission efficiency with the power supply device 20. This is done via the device 16.
Next, the operation of the non-contact power feeding system according to this embodiment will be described. First, a pilot signal is emitted from the communication device 16 of the mobile body 10 or the communication device 22 of the power feeding device 20. When the communication device 22 of the power feeding device 20 or the communication device 16 of the moving body 10 detects the released pilot signal, it detects that the power feeding device 20 and the moving body 10 have approached.
After detecting the approach between the power supply device 20 and the moving body 10, the resonance frequency of the two resonance coils is adjusted by the power transmission adjustment device 24 from the AC power supply 25 of the power supply device 20, and a magnetic field is generated from the power transmission side coil 21. generate. It is not necessary to use a magnetic field at the resonance frequency at the time of position detection. By shifting from the magnetic field at the resonance frequency, the current excited on the power receiving side is reduced and the accuracy of the detected magnetic field distribution is improved. The frequency of the magnetic field can be selected.
In the present embodiment, as shown in the flowchart of FIG. 2B, the magnetic field is measured by the three magnetic field sensor units 12a, 12b, and 12c in step S1. Here, the magnetic field sensor units 12a, 12b, and 12c measure a magnetic field in a direction parallel to the central axis of the power transmission side coil 21 at the position where the magnetic field sensor units 12a, 12b, and 12c are arranged. Next, in step S2, it is confirmed whether or not the three measured magnetic field strength values match within an allowable error range. The allowable error is an allowable value of an error due to a magnetic field disturbance due to a surrounding structure or a measurement error. When the three magnetic field strength values match, it is determined that the central axis of the power transmission side coil 21 and the central axis of the power reception side coil 11 are aligned, and there is no positional deviation. Power is transmitted to the power receiving side coil 11 that is electromagnetically coupled to the coil 21 in a non-contact manner. When there is no displacement, the maximum power transmission efficiency is obtained. The power transmitted to the power receiving side coil 11 is sent to the power storage mechanism 13 of the moving body 10 and stored. The accumulated electric power is supplied to an electric motor in the moving body 10.
When the measured three magnetic field strength values do not match in step S2, it is considered that the position of the central axis of the power transmission side coil 21 and the central axis of the power reception side coil 11 is shifted, and the system is determined in step S3. The communication control microcomputer 15 calculates the movement amount. Based on the calculated movement amount, the system / communication control microcomputer 15 adjusts the position of the power transmission side coil 21 of the power supply apparatus 20 via the communication apparatus 16 in step S4. Alternatively, the position of the power feeding device 20 itself is adjusted without changing the relative position between the power transmission side coil 21 and the power feeding device 20.
When the power feeding device 20 is moved, information on the positional deviation of the central axis is transmitted to the coil position control device through the communication device 16 and the power feeding device 20 is moved. If the relative position between the power transmission side coil 21 and the power reception side coil 11 is adjusted by moving the moving body 10 instead of moving the power supply device 20, the system / communication control microcomputer 15 drives the moving body 10. Operate the part.
In step S1, the magnetic field is measured by the three magnetic field sensor units 12a, 12b, and 12c. Next, in step S2, it is confirmed whether or not the three measured magnetic field strength values match. The alignment between the power transmission side coil 21 and the power reception side coil 11 is ideally completed by one movement. If necessary, the coefficient for calculating the movement amount is corrected and calculated again. Also, if there is no match after several trials, it informs you that there is an abnormality in the system and the surrounding environment. When the three magnetic field strength values match, it is determined that the central axis of the power transmission side coil 21 and the central axis of the power reception side coil 11 are aligned, and there is no positional deviation. Power is transmitted toward the power receiving coil 11 that is electromagnetically coupled to the coil 21 in a non-contact manner.
FIG. 3 shows that when the position of the power receiving side coil 11 is constant from the left and the central axes of the two resonance coils coincide when the magnetic field is excited in the resonance coil 11 at the resonance frequency, the centers of the two resonance coils When the axis is shifted in the x direction by the coil radius, the intensity of the XY composite component of the magnetic field when the center axis of the two resonance coils is shifted in the y direction by the coil radius is an image diagram showing by electromagnetic field simulation. As can be seen from FIG. 3, the magnetic field strength distribution is kept constant regardless of the position of the power receiving coil 11. When the magnetic field intensity distribution is a pattern that decreases substantially monotonously from the central axis of the power supply side coil 22, the magnetic field sensor unit is arranged around the power reception side coil 11 so as to be at the apex of an equilateral triangle. The deviation of the central axis of the coil can be detected from the magnetic field strength distribution. The tendency of the magnetic field distribution is the same even when the resonance frequency is not used.
When the magnetic field sensor units 12a, 12b, and 12c are arranged around the power receiving side coil 11 so as to be at the apex position of the regular triangle, the movement amount in step S3 is, for example, the movement amount Δx in the x direction is a × (F1−F2) × sin 30 °, and the movement amount Δy in the y direction is calculated by a × (F1− (F2 + F3) × cos30 °). Here, a is a certain proportional constant, F1, F2, and F3 are the magnetic field intensity values detected by the magnetic field sensor units 12a, 12b, and 12c, respectively, and the angle is a plane coordinate system centered on the center of each sensor unit. The angles when the angular position of F3 can be represented by 90 °, 210 °, and 330 ° are shown.
In the non-contact power supply system to the moving body of the present embodiment, the magnetic field sensor 12 that measures the central axis of the power transmission side coil 21 and the central axis of the power reception side coil 11 around the power reception side coil 11 measures. The alignment can be based on the intensity value. At that time, information on the magnetic field distribution is obtained from the three magnetic field sensor units 12a, 12b, and 12c, thereby grasping in which direction the central axes of the coils are shifted from each other, thereby eliminating the positional shift of the central axes. Thus, the position of the coil can be adjusted. Therefore, it can be detected in which direction the central axis of the coil is shifted in the direction of the power transmission side coil 21 and the power reception side coil 11, and the time for alignment control of the central axis of the coil can be shortened.
By using the above system, it is possible to easily and accurately know the position of the deviation between the coils, and it is possible to quickly and surely align the coils. In addition, if the frequency to be transmitted and received is known, the generated magnetic field distribution can be calculated, and if there is an abnormal substance between the transmitting and receiving coils, an abnormality occurs in the magnetic field distribution. Immediately upon detection of power, it becomes possible to ensure safety by stopping transmission and reception of power.
Although the preferred embodiment has been described above, the present invention is not limited to this. For example, in the above-described embodiment, the magnetic field sensor unit 12 has been described in the case where the magnetic field sensor unit 12 is arranged around the power receiving side coil 11 so as to be located at the apex of an equilateral triangle. It is also possible to arrange them so that they are at the positions of the vertices. Considering the magnetic field intensity distribution generated by the power transmission side coil 21 and the positional relationship between the magnetic field sensor units 12, the power value measured by the magnetic field sensor unit 12 is corrected, and the power transmission side coil is matched so that the corrected intensity values match. What is necessary is just to adjust the position of 21 and the power receiving side coil 11. FIG.
Further, the minimum number of sensor units that can determine the amount of movement Δx in the x direction and the amount of movement Δy in the y direction is three, and four or more magnetic field sensor units 12 are arranged around the power receiving side coil 11. The magnetic field strength value may be detected. FIG. 4 is a conceptual diagram for generalizing and explaining the case where the sensor units are arranged in a circle at regular intervals. When the sensor units are arranged at regular intervals in a circular shape when viewed from the center P (x, y) of each sensor unit, the amount of movement Δx in the x direction is
Figure JPOXMLDOC01-appb-I000001
And the amount of movement Δy in the y direction is
Figure JPOXMLDOC01-appb-I000002
Is calculated by Here, a is a proportional constant, and Fi (x, y) is a magnetic field strength value measured by the sensor unit at each position. The angle θn is
Figure JPOXMLDOC01-appb-I000003
The angle determined by the number n of sensor units to be arranged. The magnetic field strength values F1 (x, y), F2 (x, y), F3 (x, y),..., Fn (x, y) of the sensor unit at each position, the number n to be arranged, the proportionality constant a, Thus, the movement amount Δx in the x direction and the movement amount Δy in the y direction are calculated. Based on this, it is sufficient to move.
Since the magnetic field and the electric field are related to each other, an electric field sensor can be used instead of the magnetic field sensor. When detecting the electric field, it is preferable to look at the magnetic field component in the axial direction of the resonance coil, in which the influence of the current excited in the power receiving coil 11 is difficult to see. Further, as an electric field sensor and a magnetic field sensor, it is possible to use an optical electric field probe (EO probe) and an optical magnetic field probe (MO probe) that are less invasive to surrounding electromagnetic fields. The EO probe uses an electro-optic crystal, and the MO probe uses a magneto-optic crystal.
The positioning of the power transmission side coil 21 and the power reception side coil 11 according to the embodiment of the present invention described above is performed by detecting the pilot signal from the communication device 16 of the mobile body 10 or the communication device 22 of the power feeding device 20. And the power feeding device 20 is approached. Coarse alignment between the moving body 10 and the power feeding device 20 can use wireless communication by such a communication device. Further, when the moving body 10 is an electric vehicle, it is conceivable to perform a certain degree of alignment by driving the electric vehicle driver himself. When the positioning is completed roughly, it may be possible to notify the driver by voice or light. This rough alignment may be as accurate as entering the garage by current level drivers.
While the present invention has been described with reference to the preferred embodiments, the present invention is not limited to the above embodiments. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the present invention.
This application claims the priority on the basis of Japanese application Japanese Patent Application No. 2011-52820 for which it applied on March 10, 2011, and takes in those the indications of all here.
　１０　移動体
　１１　受電側コイル
　１２、１２ａ、１２ｂ、１２ｃ　磁界センサ部
　１３　電力蓄積機構
　１４　電磁界分布計算用マイコン
　１５　システム・通信制御用マイコン
　１６　通信装置
　２０　給電装置
　２１　送電側コイル
　２２　通信装置
　２３　コイル位置制御装置
　２４　送電電力調整装置
　２５　交流電源 DESCRIPTION OF SYMBOLS 10 Mobile body 11 Power receiving side coil 12, 12a, 12b, 12c Magnetic field sensor part 13 Electric power storage mechanism 14 Microcomputer for electromagnetic field distribution calculation 15 Microcontroller for system / communication control 16 Communication device 20 Power feeding device 21 Power transmission side coil 22 Communication device 23 Coil Position control device 24 Transmission power adjustment device 25 AC power supply

Claims (4)

  1. 　送電側コイルと電磁結合する受電側コイルを備える移動体へ、前記送電側コイルから非接触で電力を供給する、移動体への非接触給電システムであって、
    　前記受電側コイル付近の少なくとも３つの位置で、前記送電側コイルが発生させた電磁界の強度分布を検出し、前記複数の位置での電磁界の強度値が一致するように前記送電側コイルと前記受電側コイルとの位置を調整することを特徴とする移動体への非接触給電システム。     A non-contact power feeding system to a mobile body that supplies power from the power transmission side coil in a non-contact manner to a mobile body that includes a power receiving side coil that is electromagnetically coupled to a power transmission side coil,
    At least three positions in the vicinity of the power reception side coil, the intensity distribution of the electromagnetic field generated by the power transmission side coil is detected, and the power transmission side coil and the power transmission side coil are matched so that the electromagnetic field intensity values at the plurality of positions match. A non-contact power feeding system for a moving body, wherein the position of the power receiving side coil is adjusted.
  2. 　前記送電側コイルが発生させた電磁界の強度値を、磁界センサ部で検出することを特徴とする、請求項１に記載の移動体への非接触給電システム。 The non-contact power feeding system for a moving body according to claim 1, wherein a magnetic field sensor unit detects an intensity value of an electromagnetic field generated by the power transmission side coil.
  3. 　前記磁界センサ部は３つの磁界センサ部であり、前記受電側コイル付近に三角形の頂点の位置に配置されていることを特徴とする、請求項２に記載の移動体への非接触給電システム。 3. The non-contact power feeding system for a moving body according to claim 2, wherein the magnetic field sensor unit includes three magnetic field sensor units, and is disposed at a vertex of a triangle near the power receiving side coil.
  4. 　前記複数の位置での電磁界の強度値が一致していない場合、ｘ方向にａ×（Ｆ１−Ｆ２）×ｓｉｎ３０°、ｙ方向にａ×（Ｆ１−（Ｆ２＋Ｆ３）×ｃｏｓ３０°）だけ前記送電側コイルと前記受電側コイルとの相対位置を調整することを特徴とする、請求項３に記載の移動体への非接触給電システム（ここでａは比例定数、Ｆ１、Ｆ２、Ｆ３はそれぞれ磁界センサ部が検出した磁界強度値、角度は各センサの中心を中心とする平面座標系でＦ１、Ｆ２、Ｆ３の角度位置がそれぞれ９０°、２１０°、３３０°で表せるときの角度）。 When the intensity values of the electromagnetic fields at the plurality of positions do not match, the power transmission is performed by a × (F1−F2) × sin 30 ° in the x direction and a × (F1− (F2 + F3) × cos30 °) in the y direction. The non-contact power feeding system to the moving body according to claim 3, wherein a relative position between the side coil and the power receiving side coil is adjusted (where a is a proportional constant, and F1, F2, and F3 are magnetic fields, respectively. The magnetic field intensity value and angle detected by the sensor unit are angles when the angular positions of F1, F2, and F3 can be represented by 90 °, 210 °, and 330 °, respectively, in a plane coordinate system centered on the center of each sensor.
PCT/JP2012/055495 2011-03-10 2012-02-28 System for contactlessly supplying power to moving body WO2012121184A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011-052820 2011-03-10
JP2011052820 2011-03-10

Publications (1)

Publication Number Publication Date
WO2012121184A1 true WO2012121184A1 (en) 2012-09-13

Family

ID=46798146

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2012/055495 WO2012121184A1 (en) 2011-03-10 2012-02-28 System for contactlessly supplying power to moving body

Country Status (1)

Country Link
WO (1) WO2012121184A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104124772A (en) * 2013-04-28 2014-10-29 海尔集团技术研发中心 Wireless electric power transmission, emitting end, receiving end and powering up method thereof
JP2014217213A (en) * 2013-04-26 2014-11-17 トヨタ自動車株式会社 Power receiver, parking support device, and power transmission system
WO2015043797A1 (en) * 2013-09-25 2015-04-02 Robert Bosch Gmbh Method, device, and system for determining a position of a vehicle
WO2016121050A1 (en) * 2015-01-29 2016-08-04 日産自動車株式会社 Parking assistance device and parking assistance method
WO2018192697A1 (en) * 2017-04-19 2018-10-25 Innofas Gmbh Test bench for testing for contactless charging
CN113595255A (en) * 2021-07-14 2021-11-02 Oppo广东移动通信有限公司 Method for adjusting coil position, mobile terminal and storage medium

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0764637A (en) * 1993-08-24 1995-03-10 Matsushita Electric Ind Co Ltd Mobile robot
JPH09215211A (en) * 1996-02-02 1997-08-15 Sumitomo Wiring Syst Ltd Charging system for electric vehicle
JP2009089464A (en) * 2007-09-27 2009-04-23 Panasonic Corp Electronic equipment and charging system
JP2010178499A (en) * 2009-01-29 2010-08-12 Aisin Aw Co Ltd Noncontact charger, distance measuring unit of positional relation detector for noncontact charger, and distance measurement unit of positional relation detector

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0764637A (en) * 1993-08-24 1995-03-10 Matsushita Electric Ind Co Ltd Mobile robot
JPH09215211A (en) * 1996-02-02 1997-08-15 Sumitomo Wiring Syst Ltd Charging system for electric vehicle
JP2009089464A (en) * 2007-09-27 2009-04-23 Panasonic Corp Electronic equipment and charging system
JP2010178499A (en) * 2009-01-29 2010-08-12 Aisin Aw Co Ltd Noncontact charger, distance measuring unit of positional relation detector for noncontact charger, and distance measurement unit of positional relation detector

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014217213A (en) * 2013-04-26 2014-11-17 トヨタ自動車株式会社 Power receiver, parking support device, and power transmission system
WO2014174361A3 (en) * 2013-04-26 2014-12-31 Toyota Jidosha Kabushiki Kaisha Power receiving device, parking assist system, and power transfer system
CN104124772A (en) * 2013-04-28 2014-10-29 海尔集团技术研发中心 Wireless electric power transmission, emitting end, receiving end and powering up method thereof
JP2016537941A (en) * 2013-09-25 2016-12-01 ローベルト ボッシュ ゲゼルシャフト ミット ベシュレンクテル ハフツング Method, apparatus and system for positioning a vehicle
CN105579276A (en) * 2013-09-25 2016-05-11 罗伯特·博世有限公司 Method, device, and system for determining position of vehicle
WO2015043797A1 (en) * 2013-09-25 2015-04-02 Robert Bosch Gmbh Method, device, and system for determining a position of a vehicle
US9821674B2 (en) 2013-09-25 2017-11-21 Robert Bosch Gmbh Method, device and system for determining a position of a vehicle
WO2016121050A1 (en) * 2015-01-29 2016-08-04 日産自動車株式会社 Parking assistance device and parking assistance method
CN107206909A (en) * 2015-01-29 2017-09-26 日产自动车株式会社 Parking aid and parking assistance method
JPWO2016121050A1 (en) * 2015-01-29 2017-11-09 日産自動車株式会社 Parking assistance device and parking assistance method
RU2643317C1 (en) * 2015-01-29 2018-01-31 Ниссан Мотор Ко., Лтд. Parking assistance device and parking assistance method
US10116173B2 (en) 2015-01-29 2018-10-30 Nissan Motor Co., Ltd. Parking assistance device and parking assistance method
WO2018192697A1 (en) * 2017-04-19 2018-10-25 Innofas Gmbh Test bench for testing for contactless charging
CN113595255A (en) * 2021-07-14 2021-11-02 Oppo广东移动通信有限公司 Method for adjusting coil position, mobile terminal and storage medium

Similar Documents

Publication Publication Date Title
WO2012121184A1 (en) System for contactlessly supplying power to moving body
JP6369304B2 (en) Wireless power transmission system
US9840152B2 (en) Apparatus for inductive power transmission
ES2898674T3 (en) Device for contactless inductive energy transmission and method of operation for such a device
US20150137801A1 (en) Method and apparatus for aligning a vehicle with an inductive charging system
JP5440621B2 (en) Non-contact power feeding device
WO2012115047A1 (en) Contactless power transfer device for moving part
JP2011160515A (en) Radio charging apparatus for vehicle
WO2012111155A1 (en) Position alignment device, power reception device, and power transmission device
WO2015008662A1 (en) Foreign matter detection device and method for contactless power supply device
WO2013084492A1 (en) Vehicle guidance device and vehicle guidance method
JP2010178499A (en) Noncontact charger, distance measuring unit of positional relation detector for noncontact charger, and distance measurement unit of positional relation detector
JP5983281B2 (en) Contactless power supply system
JP2017528703A (en) Coil coverage
WO2015075858A1 (en) Contactless power transmitting device and contactless power transfer system
CN109682292A (en) A kind of bias detecting method, device and wireless charging system
JP2019097292A (en) vehicle
TW201729511A (en) Method for operating a monitoring apparatus for monitoring an inductive energy transmission apparatus
CN109412280A (en) Based on the wireless power transmission winding position device for identifying and method for predriving magnetic field
JP2012005308A (en) Wireless power transmission system
WO2016072351A1 (en) Coil device, contactless power supply system, and auxiliary magnetic member
JP2013121258A (en) Non contact power transmission apparatus
CN210852086U (en) Electric automobile wireless charging coil guide alignment device
JP2013090392A (en) Non-contact charging device and non-contact power supply facility
CN106066148B (en) Wireless power electric vehicle positioning device and localization method based on three-winding

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12755726

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12755726

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP