WO2013001811A1 - Dispositif d'alimentation en énergie et dispositif de réception d'énergie utilisés pour une transmission d'énergie électrique sans contact - Google Patents

Dispositif d'alimentation en énergie et dispositif de réception d'énergie utilisés pour une transmission d'énergie électrique sans contact Download PDF

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Publication number
WO2013001811A1
WO2013001811A1 PCT/JP2012/004170 JP2012004170W WO2013001811A1 WO 2013001811 A1 WO2013001811 A1 WO 2013001811A1 JP 2012004170 W JP2012004170 W JP 2012004170W WO 2013001811 A1 WO2013001811 A1 WO 2013001811A1
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WO
WIPO (PCT)
Prior art keywords
power
receiving device
cover
substrate
unit
Prior art date
Application number
PCT/JP2012/004170
Other languages
English (en)
Japanese (ja)
Inventor
芳弘 阪本
大森　義治
別荘　大介
Original Assignee
パナソニック株式会社
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 パナソニック株式会社 filed Critical パナソニック株式会社
Publication of WO2013001811A1 publication Critical patent/WO2013001811A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
    • B60M7/00—Power lines or rails specially adapted for electrically-propelled vehicles of special types, e.g. suspension tramway, ropeway, underground railway
    • B60M7/003—Power lines or rails specially adapted for electrically-propelled vehicles of special types, e.g. suspension tramway, ropeway, underground railway for vehicles using stored power (e.g. 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
    • 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
    • B60L53/122—Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil
    • 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
    • B60L53/124—Detection or removal of foreign bodies
    • 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
    • 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
    • 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
    • H02J50/60—Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings
    • 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
    • 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]
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00304—Overcurrent protection
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00308—Overvoltage protection
    • 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
    • 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 power supply device and a power receiving device for non-contact power transmission used for charging an electric propulsion vehicle such as an electric vehicle or a plug-in hybrid vehicle.
  • FIG. 6 is a schematic diagram showing a configuration of a conventional non-contact power transmission system 6.
  • the non-contact power feeding device (primary side) F connected to the power panel of the ground-side power source 9 is supplied with power to the power receiving device (secondary side) G mounted on the electric propulsion vehicle. It arrange
  • an alternating current is applied to the primary coil 7 provided in the power feeding device F to form a magnetic flux
  • an induced electromotive force is generated in the secondary coil 8 provided in the power receiving device G. Electric power is transmitted from the coil 7 to the secondary coil 8 without contact.
  • the power receiving device G is connected to the in-vehicle battery 10, for example, and the electric power transmitted as described above is charged in the in-vehicle battery 10.
  • the on-vehicle motor 11 is driven by the electric power stored in the battery 10. Note that, during the non-contact power supply process, for example, the wireless communication device 12 exchanges necessary information between the power supply device F and the power reception device G.
  • FIG. 7 is a schematic diagram showing the internal structure of the power feeding device F and the power receiving device G.
  • FIG. 7A is a schematic diagram illustrating an internal structure when the power feeding device F is viewed from above and the power receiving device G is viewed from below.
  • FIG. 7B is a schematic diagram illustrating an internal structure when the power feeding device F and the power receiving device G are viewed from the side.
  • the power feeding device F includes a primary coil 7, a primary magnetic core 13, a back plate 15, a cover 16, and the like.
  • the power receiving device G has a symmetrical structure with the power feeding device F, and includes a secondary coil 8, a secondary magnetic core 14, a back plate 15, a cover 16, and the like.
  • the surface of the primary magnetic core 13 and the surfaces of the secondary coil 8 and the secondary magnetic core 14 are fixedly covered with a mold resin 17 in which a foam material 18 is mixed.
  • both the power feeding device F and the power receiving device G are filled with the mold resin 17 between the back plate 15 and the cover 16, and the primary coil 7, the secondary coil 8, the primary magnetic core 13, and the secondary magnetic core core inside.
  • the surface of 14 is covered and fixed.
  • the mold resin 17 is made of, for example, silicon resin.
  • the power feeding device F and the power receiving device G are basically installed outdoors, it is conceivable that foreign matter may be placed on the cover 16.
  • a metal object which is an example of a foreign object
  • the cover 16 when a metal object, which is an example of a foreign object, is placed on the cover 16 during power transmission and left as it is, the metal object will be overheated.
  • a loop-shaped conductor capable of interlinking magnetic flux is inserted between the primary coil 7 and the secondary coil 8
  • an electromotive force is generated at both ends of the conductor.
  • the power feeding device F and the power receiving device G may be damaged. From the above, when foreign matter enters between the primary coil 7 and the secondary coil 8 during power transmission, it is required to reliably detect the entry of the foreign matter.
  • an object of the present invention is to provide a power feeding device and a power receiving device that can reliably detect the intrusion of foreign matter between a primary coil and a secondary coil.
  • the present invention is configured as follows.
  • a power feeding device that supplies power to a power receiving device in a contactless manner, a substrate, a primary coil that is disposed on the substrate and generates a magnetic flux by an alternating current, and is attached to the substrate
  • a power feeding device including a cover that covers the primary coil and a capacitance sensor that detects an object present on the cover.
  • a power receiving device that receives power supply from a power feeding device in a non-contact manner, wherein an electromotive force is generated by a substrate and a magnetic flux that is disposed on the substrate and generated by a primary coil of the power feeding device.
  • a power receiving device including a generated secondary coil, a cover attached to the substrate and covering the secondary coil, and a capacitance sensor that detects an object present on the cover.
  • the power feeding device and the power receiving device include the capacitance sensor that can detect an object present on the cover, it is possible to reliably intrude foreign matter between the primary coil and the secondary coil. It becomes possible to detect.
  • FIG. 1 The block diagram of the non-contact charging device provided with the electric power feeder and electric power receiving apparatus which concern on this invention Front view of the non-contact charging device shown in FIG.
  • Block diagram of foreign matter detection means that is a capacitance sensor Partial sectional view of the power feeding device Partial sectional view of another form of power feeding device Flow chart showing foreign object detection and transmission power control Flow chart showing foreign object intrusion processing
  • One embodiment of the present invention is a power supply device that supplies power to a power receiving device in a contactless manner, and is attached to the substrate, a primary coil that is disposed on the substrate and generates a magnetic flux by an alternating current, A cover that covers the primary coil; and a capacitance sensor that detects an object present on the cover.
  • a power receiving device that receives power from a power feeding device in a non-contact manner, and generates an electromotive force by a substrate and a magnetic flux that is disposed on the substrate and is generated by a primary coil of the power feeding device.
  • a secondary coil that is attached to the substrate and covers the secondary coil, and a capacitance sensor that detects an object present on the cover.
  • the power feeding device and the power receiving device include the electrostatic capacity sensor that can detect an object present on the cover, it is possible to reliably detect entry of foreign matter between the primary coil and the secondary coil. It becomes possible.
  • “on the cover” means on the outer surface of the cover or above the outer surface of the cover.
  • the capacitance sensor is preferably installed between the cover and the coil in order to be protected from the outside.
  • FIG. 1 is a block diagram of a non-contact charging apparatus according to the present invention.
  • FIG. 2 is an external view of the vehicle installed in the parking space.
  • the non-contact charging device includes a power feeding device 2 installed in a parking space, for example, and a power receiving device 4 mounted on an electric propulsion vehicle, for example.
  • the power feeding device 2 includes a power supply box 8 connected to the commercial power supply 6, an inverter unit 10, a ground side coil unit 12, a foreign matter detection unit 14, and a control unit (for example, a microcomputer) 16.
  • the power receiving device 4 includes a vehicle side coil unit 18, a rectifying unit 20, a load (battery) 22, and a control unit (for example, a microcomputer) 24.
  • the commercial power source 6 is a 200 V commercial power source that is a low-frequency AC power source, and is connected to the input end of the power source box 8, and the output end of the power source box 8 is connected to the input end of the inverter unit 10.
  • the output end of the unit 10 is connected to the ground side coil unit 12.
  • the output end of the vehicle side coil unit 18 is connected to the input end of the rectifying unit 20, and the output end of the rectifying unit 20 is connected to the load 22.
  • the ground side coil unit 12 is laid on the ground, and the power supply box 8 is erected at a position separated from the ground side coil unit 12 by a predetermined distance, for example.
  • the vehicle side coil unit 18 is attached to, for example, a vehicle body bottom (for example, a chassis).
  • the power feeding device side control unit 16 performs wireless communication with the power receiving device side control unit 24, and the power receiving device side control unit 24 determines a power command value according to the detected residual voltage of the load 22, and determines the determined power command value. It transmits to the electric power feeder side control part 16.
  • the power feeding device side control unit 16 compares the power feeding power detected by the ground side coil unit 12 with the received power command value, and drives the inverter unit 10 so as to obtain the power command value.
  • the power receiving device side control unit 24 detects the received power and changes the power command value to the power feeding device side control unit 16 so that the load 22 is not overcurrent or overvoltage.
  • the vehicle side coil unit 18 is disposed to face the ground side coil unit 12 by appropriately moving the vehicle, and the power supply device side control is performed.
  • the unit 16 drives and controls the inverter unit 10
  • a high-frequency electromagnetic field is formed between the ground side coil unit 12 and the vehicle side coil unit 18.
  • the power receiving device 4 takes out electric power from the high frequency electromagnetic field and charges the load 22 with the taken out electric power.
  • the foreign matter detection means 14 is for detecting whether or not there is a foreign matter in the electromagnetic field region and its vicinity, and is provided, for example, in the ground side coil unit 12 of the power feeding device 2 as shown in FIG.
  • the “foreign matter” in the present invention is an object that may enter a high-frequency electromagnetic field region, and in particular, a non-contact charging device (in the present embodiment, a power feeding device 2) by raising the temperature by an electromagnetic field. ) Is a piece of metal that may cause damage.
  • FIG. 3 is a block diagram of the foreign matter detection means 14.
  • the foreign matter detection means 14 is a capacitance sensor that measures the capacitance between the foreign matter and is configured to detect the foreign matter based on a change in the measured capacitance.
  • the foreign matter detection means 14 includes an electrode 30, a voltage supply unit 32, a C / V conversion unit 34, and a signal processing unit 36.
  • the foreign matter detecting means 14 (its electrode 30) is installed on the back side of the cover 40 of the ground side coil unit 12 as shown in FIG. 4A.
  • the cover 40 of the ground side coil unit 12 is attached to the substrate 42 so as to cover the primary coil 44 from above in order to protect the primary coil 44 disposed on the substrate 42.
  • the electrode 30 of the foreign matter detection means 14 is the back side of the cover 40, that is, the primary side of the cover 40 so as to be protected from the outside so that the capacitance between the foreign matter 38 existing on the cover 40 can be measured. It is installed between the coil 44.
  • the electrode 30 of the foreign matter detection means 14 may be incorporated in the cover 40 so as not to be exposed to the outside, as shown in FIG. 4B.
  • the voltage supply unit 32 of the foreign object detection unit 14 applies a predetermined potential with respect to the ground (GND) potential to the electrode 3.
  • GND ground
  • a capacitance C1 is generated between the electrode 30 and the foreign substance 38, and the capacitance C1 is expressed by Equation 1.
  • Equation 1 ⁇ 0 is the dielectric constant of vacuum, ⁇ r is the relative dielectric constant, S is the minimum area opposite to the electrode 30 and the foreign material 38, and d is the distance between the electrode 30 and the foreign material 38.
  • the C / V conversion unit 34 of the foreign matter detection means 14 converts the capacitance C1 into a voltage value.
  • the C / V conversion unit 34 converts the electrostatic capacitance C1 + C2 into a corresponding voltage value.
  • the signal processing unit 36 of the foreign matter detection unit 14 generates a signal corresponding to the voltage value generated by the conversion of the C / V conversion unit 34, that is, a signal corresponding to the measured capacitance. It transmits to the control part 16 of the electric power feeder 2.
  • step S ⁇ b> 1 of the flowchart of FIG. 5A the vehicle equipped with the power receiving device 4 stops so that the coil unit 18 faces the ground side coil unit 12, and the power feeding device side control unit 16 starts from the power receiving device side control unit 24.
  • the power supply device side control unit 16 starts the electrostatic capacitance measurement operation by the foreign matter detection means 14, and the electrostatic capacitance measured by the foreign matter detection means 14 is controlled as a signal.
  • the data is input to the unit 16 and stored as an initial value. For example, the capacitance when the foreign object 38 does not exist on the cover 40 of the power supply apparatus 2 is stored as the initial value.
  • step S3 the power feeding device side control unit 16 instructs the inverter unit 10 to start power transmission, and starts power supply from the ground side coil unit 12 to the vehicle side coil unit 18.
  • step S4 the power supply apparatus side control unit 16 compares the electrostatic capacity measured by the foreign object detection means 14 during power supply with the stored initial value, and determines whether or not a foreign object has entered during power supply. That is, it is determined whether or not the capacitance measured by the foreign matter detection means 14 has changed from the initial value and exceeded due to the entry of the foreign matter. Note that, for example, when the absolute value of the difference between the measured capacitance and the initial value exceeds a predetermined value, it may be determined that a foreign object has entered.
  • step S4 If it is determined in step S4 that a foreign object has entered during power supply, the process proceeds to step S5 to prevent the power supply device 2 from being damaged due to overheating of the foreign object, and a foreign object intrusion process for controlling transmission power. I do. If it is determined in step S4 that no foreign matter has entered, the power supply device side control unit 16 causes the inverter unit 10 to continue power transmission in step S6.
  • step S21 the foreign object intrusion is notified by a notification means such as a display or sound.
  • a notification means such as a display or sound.
  • the notification is made by the speaker 46 shown in FIG.
  • step S22 it is determined whether or not the capacitance measured by the foreign object detection means 14 during power supply exceeds a preset value.
  • the set value is set to a capacitance value that can be taken when the foreign object is a metal object, for example.
  • step S22 If it is determined in step S22 that the capacitance exceeds the set value, the process proceeds to step S23, and the power feeding device side control unit 16 transmits the ground side coil unit 12 to the vehicle side coil unit 18. Control is performed to reduce power by a predetermined amount (for example, 1/2) or stop power transmission. Further, in step S24, a notification means such as display or sound notifies that the transmission power is controlled by the entry of the foreign object, and the foreign object intrusion process is terminated.
  • a notification means such as display or sound notifies that the transmission power is controlled by the entry of the foreign object, and the foreign object intrusion process is terminated.
  • step S22 If it is determined in step S22 that the capacitance does not exceed the set value, the foreign substance intrusion process is terminated bypassing steps S23 and S24.
  • step S7 if there is an instruction to interrupt power transmission due to the removal of foreign matter by a person or the use of a car, the process proceeds to step S9, and the power supply device side control unit 16 supplies power to the inverter unit 10. The transmission end is instructed, the power supply from the ground side coil unit 12 to the vehicle side coil unit 18 is stopped, and the foreign matter detection means 14 ends the capacitance measuring operation.
  • step S7 when there is no instruction to interrupt power transmission, the process proceeds to step S8, where it is determined whether charging is completed. If charging is not completed, the process returns to step S4, and charging is completed. In step S9, the power supply is terminated and the foreign object detection operation is terminated.
  • the power feeding device 2 includes the foreign matter detection means (capacitance sensor) 14 that can detect an object present on the cover 40, and therefore the ground side coil unit 12 and the vehicle side coil unit. Thus, it is possible to reliably detect the entry of a foreign object between the two.
  • the foreign object detection means may be provided in the power receiving device 4.
  • the foreign matter attached to or approaching the cover of the power receiving device 4 facing the power feeding device 2 can be reliably detected.
  • the present invention can reliably detect foreign matter that has entered near the electromagnetic field region during power feeding from the power feeding device to the power receiving device. This is useful for power supply to a power receiving device of an electric propulsion vehicle.
  • Power feeding device 4 Power receiving device 6 Commercial power supply 8 Power supply box 10 Inverter unit 12 Ground side coil unit 14 Foreign matter detection means (capacitance sensor) 16 Power Supply Device Side Control Unit 18 Vehicle Side Coil Unit 20 Rectification Unit 22 Load (Battery) 24 power receiving device side control unit 30 electrode 32 voltage supply unit 34 C / V conversion unit 36 signal processing unit 40 cover 42 substrate 44 primary coil

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Transportation (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

L'invention concerne un dispositif d'alimentation en énergie (2), qui fournit une énergie électrique d'une manière sans contact à un dispositif de réception d'énergie (4), qui comprend : un substrat (42) ; une bobine primaire (44) qui est positionnée sur le substrat (42) et génère un flux au moyen d'un courant alternatif ; une couverture (40) qui est fixée au substrat (42) et recouvre la bobine primaire (44) ; et un capteur de capacitance (14) qui détecte un objet qui est présent sur la couverture (40). Etant donné que le capteur de capacitance (14), qui est apte à détecter l'objet qui est présent sur la couverture (40), est présent, un objet étranger entre la bobine primaire (44) et une bobine secondaire appartenant au dispositif de réception d'énergie (4) peut être détecté de façon fiable.
PCT/JP2012/004170 2011-06-30 2012-06-27 Dispositif d'alimentation en énergie et dispositif de réception d'énergie utilisés pour une transmission d'énergie électrique sans contact WO2013001811A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011146256 2011-06-30
JP2011-146256 2011-06-30

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WO2013001811A1 true WO2013001811A1 (fr) 2013-01-03

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2508924A (en) * 2012-12-17 2014-06-18 Bombardier Transp Gmbh Inductive power transfer system having array of sensing capacitors
EP2891575A1 (fr) 2014-01-02 2015-07-08 Brusa Elektronik AG Élément de transmission pour un système de transmission d'énergie inductif
CN107846084A (zh) * 2017-11-09 2018-03-27 维沃移动通信有限公司 一种无线充电发射装置及无线充电方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0716553U (ja) * 1993-08-25 1995-03-17 松下電工株式会社 電源装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0716553U (ja) * 1993-08-25 1995-03-17 松下電工株式会社 電源装置

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2508924A (en) * 2012-12-17 2014-06-18 Bombardier Transp Gmbh Inductive power transfer system having array of sensing capacitors
US9895989B2 (en) 2012-12-17 2018-02-20 Bombardier Transportation Gmbh Safety system, a method of operating a safety system and a method of building a safety system
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