WO2015087399A1 - 送電装置、給電システム - Google Patents
送電装置、給電システム Download PDFInfo
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- WO2015087399A1 WO2015087399A1 PCT/JP2013/083133 JP2013083133W WO2015087399A1 WO 2015087399 A1 WO2015087399 A1 WO 2015087399A1 JP 2013083133 W JP2013083133 W JP 2013083133W WO 2015087399 A1 WO2015087399 A1 WO 2015087399A1
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- power
- power transmission
- magnetic body
- coil
- transmission coil
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/90—Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
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- 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
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
- B60L53/12—Inductive energy transfer
- B60L53/126—Methods for pairing a vehicle and a charging station, e.g. establishing a one-to-one relation between a wireless power transmitter and a wireless power receiver
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/30—Constructional details of charging stations
- B60L53/305—Communication interfaces
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/08—Variable transformers or inductances not covered by group H01F21/00 with core, coil, winding, or shield movable to offset variation of voltage or phase shift, e.g. induction regulators
- H01F29/10—Variable transformers or inductances not covered by group H01F21/00 with core, coil, winding, or shield movable to offset variation of voltage or phase shift, e.g. induction regulators having movable part of magnetic circuit
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/14—Inductive couplings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- 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 power transmission device and a power supply system.
- a power feeding system having a power transmitting device and a power receiving device is known (for example, Patent Document 1).
- the main present invention for solving the above-described problems is a power transmission circuit having a power transmission coil for transmitting power to a power reception coil of a power reception device, and a magnetic body magnetically coupled between the power transmission coil,
- a power transmission device comprising: a moving device that changes a relative position between the magnetic body and the power transmission coil to change an impedance of the power transmission circuit so that the power is cut off or transmitted. It is.
- the power supplied from the power transmission device to the power reception device can be cut off or transmitted.
- FIG. 1st Embodiment of this invention It is a perspective view which shows the electric power feeding system in 1st Embodiment of this invention. It is sectional drawing which shows the electric power feeding system in 1st Embodiment of this invention. It is a figure which shows the electric power feeding system in 1st Embodiment of this invention. It is sectional drawing which shows the electric power feeding system of the state in which the power receiving apparatus in 1st Embodiment of this invention was provided in the 1st position. It is sectional drawing which shows the electric power feeding system of the state in which the power transmission coil in 1st Embodiment of this invention was moved to the 2nd height position. It is a figure which shows the relationship between the frequency and transmission power in 1st Embodiment of this invention.
- FIG. 1 is a perspective view showing a power feeding system in the present embodiment.
- the casings 25 and 35 are indicated by broken lines.
- FIG. 2 is a cross-sectional view showing the power supply system in the present embodiment. Note that FIG. 2 shows the power supply system 100 in a state viewed from the cross section passing through the approximate center of the power supply system 100 in FIG. 1 and parallel to the XZ plane toward + Y (from the front to the back of the paper).
- FIG. 3 is a diagram illustrating a power feeding system according to the present embodiment.
- the power supply system 100 is a system that performs non-contact power transmission using, for example, a resonance phenomenon of an electromagnetic field.
- the Z axis is an axis along the vertical direction in which the power transmission device 2 and the power reception device 3 are adjacent to each other. The direction from the power transmission device 2 to the power reception device 3 is + Z, and the direction from the power reception device 3 to the power transmission device 2 is the axis. -Z.
- the X axis is an axis along the direction in which the moving devices 281 and 284 are arranged, and the direction from the moving device 281 toward the moving device 284 is + X, and the direction from the moving device 284 toward the moving device 281 is ⁇ X.
- the Y axis is an axis orthogonal to the X axis and the Z axis, and the direction from the front to the back of the paper is + Y, and the direction from the back to the front is -Y.
- the power supply system 100 includes a power transmission device 2 and a power reception device 3.
- the power transmission device 2 is a device that transmits power to the power receiving device 3 in a contactless manner.
- the power receiving device 3 is a device that receives power output from the power transmitting device 2 and supplies the load 31 with power corresponding to the received power.
- the load 31 is a power load such as an electric device that operates based on the power supplied from the power receiving device 3.
- the power transmission device 2 includes a power transmission coil 24, a casing 25, a magnet 26 (second magnet), a magnetic body 27, moving devices 281 and 284, and an elastic device 291 (also referred to as “power control mechanism”).
- the magnet 26 and the elastic device 291 correspond to a moving device.
- the elastic device 291 corresponds to an elastic body.
- the housing 25 accommodates the power transmission circuit 200 and the power control mechanism.
- the outer shape of the housing 25 has a cylindrical shape, for example, and is formed using an insulating material such as a resin.
- the power transmission coil 24 is wound in a cylindrical shape around a winding shaft 241 along the vertical direction (Z-axis).
- an opening 243 through which the magnet 26 and the magnetic body 27 are taken in and out is formed substantially at the center.
- the power transmission coil 24 may have an opening similar to the opening 243 and may be accommodated in an insulating case along the outer shape of the power transmission coil 24.
- the moving devices 281 and 284 are fixed to the bottom plate 252 of the housing 25 and support the power transmission coil 24 so as to be movable in the vertical direction.
- the moving device 281 includes a first member 282 and a second member 283.
- the first member 282 has a cylindrical shape and is formed of an insulating material such as a resin.
- the lower end ( ⁇ Z) of the first member 282 is fixed to the bottom plate 252.
- the second member 283 has a cylindrical shape and is formed of an insulating material such as a resin.
- the upper end (+ Z) of the second member 283 is fixed to the lower part ( ⁇ Z) of the power transmission coil 24.
- the outer diameter of the second member 283 is set smaller than the inner diameter of the first member 282 so that the second member 283 is inserted into the first member 282.
- the second member 283 is moved upward (+ Z) or moved downward by an actuator (not shown) provided in the first member 282, for example.
- the actuator operates based on the driving force applied from the servo motor 51 controlled by the control device 4. That is, the moving device 281 moves the power transmission coil 24 upward or moves downward based on the control of the control device 4. Since the moving device 284 is the same as the moving device 281, description thereof is omitted.
- the moving device 281 has a first height position where the height from the bottom plate 252 of the power transmission coil 24 in the vertical direction is H1 (FIG. 2), and the height from the bottom plate 252 of the power transmission coil 24 in the vertical direction.
- the device power transmission coil 24 is moved to any one of the second height positions that become H2 (FIG. 5).
- the magnetic body 27 is, for example, cobalt or ferrite for changing the impedance of the power transmission circuit 200 including the power transmission coil 24.
- the magnetic body 27 may be a coil wound around a winding axis along the Z axis.
- the magnetic body 27 is magnetically coupled to the power transmission coil 24.
- the magnetic body 27 may be a ferromagnetic body.
- the magnetic body 27 has a substantially cylindrical shape. The outer diameter of the magnetic body 27 is set smaller than the diameter of the opening 243 so that the magnetic body 27 can be taken in and out of the opening 243 of the power transmission coil 24.
- an adhesive is used on the upper surface (+ Z) of the magnetic body 27 so that the magnet 26 moves in the vertical direction together with the magnetic body 27 based on the magnetic force applied from the magnet 36 (first magnet) of the power receiving device 3.
- the outer diameter of the magnet 26 is set smaller than the diameter of the opening 243 so that the magnet 26 can be taken in and out of the opening 243 of the power transmission coil 24.
- the magnet 26 is magnetized so that the upper part of the magnet 26 has the same polarity as the lower part of the magnet 36 so as to make contact with the magnet 36.
- the magnet 26 may be made of a material having a relative permeability lower than that of the magnetic body 27 so that the degree of the influence of the movement of the magnet 26 on the impedance change of the power transmission circuit 200 becomes relatively small. .
- the elastic device 291 elastically supports the magnetic body 27 and the magnet 26 so as to be movable in the vertical direction.
- the elastic device 291 is fixed to the approximate center of the bottom plate 252.
- the magnetic body 27 is disposed so as to include the winding shaft 241 of the power transmission coil 24.
- the elastic device 291 has a first member 292 and a second member 293.
- the first member 292 has a cylindrical shape and is formed of an insulating material such as a resin. The lower end of the first member 292 is fixed to the bottom plate 252.
- the second member 293 has a cylindrical shape and is formed of an insulating material such as a resin.
- the upper end of the second member 293 is fixed to the lower surface ( ⁇ Z) of the magnetic body 27.
- the outer diameter of the second member 293 is set smaller than the inner diameter of the first member 292 so that the second member 293 is inserted into the first member 292.
- the second member 293 is urged from the lower side to the upper side by the elastic force of an elastic body such as a spring provided inside the first member 292, for example.
- the power transmission device 2 further includes a power source 21, an inverter 22, a capacitor 23, a control device 4, a servo motor 51, and a measurement device 52.
- the power source 21 generates DC power.
- the inverter 22 converts DC power supplied from the power source 21 into AC power.
- the power transmission coil 24 is a primary coil of the power feeding system 100 for supplying power to the power receiving coil 34 in a contactless manner.
- the capacitor 23 is used to set the impedance of the power transmission circuit 200.
- One end of the power source 21 is connected to one end of the capacitor 23 via the inverter 22.
- the other end of the power source 21 is connected to one end of the power transmission coil 24 via the inverter 22.
- the other end of the power transmission coil 24 is connected to the other end of the capacitor 23.
- DC power output from the power source 21 is converted from DC to AC by the inverter 22 and supplied to the power transmission coil 24.
- the AC power supplied to the power transmission coil 24 is supplied from the power transmission coil 24 to the power reception coil 34.
- the measuring device 52 measures the current supplied to the power transmission coil 24 and transmits a cutoff signal to the control device 4. For example, the measuring device 52 transmits a cutoff signal when a current having a value larger than a predetermined value is measured.
- the predetermined value is, for example, a value that does not cause damage to the power transmission device 2 and may be determined based on the specification of the power transmission device 2 and the like.
- the servo motor 51 applies a driving force for driving the moving devices 281 and 284 to the moving devices 281 and 284.
- the servo motor 51 is controlled by the control device 4.
- the control device 4 changes the impedance of the power transmission circuit 200 by moving the power transmission coil 24 so that the power supplied from the power transmission coil 24 to the power reception coil 34 is interrupted when the cutoff signal is received.
- the control device 4 will be described later.
- the power receiving device 3 includes a power receiving coil 34, a housing 35, and a magnet 36.
- the housing 35 accommodates a power receiving circuit 300 having a power receiving coil 34 and a magnet 36.
- the outer shape of the housing 35 has a cylindrical shape, for example, and is formed using an insulating material such as a resin.
- the power receiving coil 34 is wound around a winding shaft 341 along the vertical direction (Z axis).
- the power receiving coil 34 is fixed at a predetermined position near the lower side ( ⁇ Z) inside the housing 35.
- the magnet 36 has, for example, a substantially cylindrical shape.
- the outer diameter of the magnet 36 is set smaller than the inner diameter of the power receiving coil 34 so that the magnet 36 is fixed inside the power receiving coil 34.
- the magnet 36 is fixed to the power receiving coil 34 using, for example, an adhesive or the like while being provided inside the power receiving coil 34.
- the power receiving device 3 further includes a rectifier circuit 32 and a capacitor 33.
- the power receiving coil 34 is a secondary coil of the power feeding system 100 to which electric power is supplied from the power transmitting coil 24 in a non-contact manner.
- the rectifier circuit 32 converts the AC power supplied from the power receiving coil 34 into DC power, and supplies the converted DC power to the load 31.
- the capacitor 33 is used to set the impedance value of the power receiving circuit 300.
- One end of the power receiving coil 34 is connected to a load 31 via a capacitor 33 and a rectifier circuit 32.
- the other end of the power receiving coil 34 is connected to the load 31 via the rectifier circuit 32.
- a power receiving circuit 300 having a power receiving coil 34, a capacitor 33, a rectifier circuit 32, and a load 31 is formed.
- FIG. 4 is a cross-sectional view illustrating the power feeding system in a state where the power receiving device in the present embodiment is provided at the first position.
- FIG. 5 is a cross-sectional view illustrating the power feeding system in a state where the power transmission coil in the present embodiment is moved to the second height position. 4 and 5 are sectional views similar to FIG.
- the power reception device 3 When power is transmitted from the power transmission device 2 to the power reception device 3, the power reception device 3 is provided at the first position. As shown in FIG. 4, the first position is a position where the facing surface 351 of the power receiving device 3 and the facing surface 251 of the power transmission device 2 are in contact with each other.
- Magnetic force is applied from the magnet 36 to the magnet 26.
- the magnet 26 and the magnetic body 27 move downward ( ⁇ Z) based on the magnetic force resisting the elastic force.
- the elastic force is such that when the power transmission coil 24 is provided at the first height position and the power receiving device 3 is provided at the first position, the magnet 26 is surrounded by the power transmission coil 24 and the magnetic body 27 is The magnet 26 and the magnetic body 27 are set so as to be provided at a position not surrounded by the power transmission coil 24.
- the relative positional relationship among the power receiving coil 34, the power transmitting coil 24, and the magnetic body 27 shown in FIG. 4 is also referred to as a first positional relationship.
- the power reception device 3 When power is not transmitted from the power transmission device 2 to the power reception device 3, the power reception device 3 is provided at the second position. As shown in FIG. 2, the second position is a position where the power receiving device 3 is separated from the power transmitting device 2. That is, the second position is a position where the power receiving device 3 is farther from the power transmission coil 24 than the first position. The second position is also a position where the magnetic force of the magnet 36 is not applied to the magnet 26.
- the elastic force is such that when the power transmission coil 24 is provided at the first height position and the power receiving device 3 is provided at the second position, the magnet 26 is not surrounded by the power transmission coil 24 and the magnetic body 27 is It is also set so that the magnet 26 and the magnetic body 27 are provided at a position surrounded by the power transmission coil 24.
- the relative positional relationship among the power receiving coil 34, the power transmitting coil 24, and the magnetic body 27 shown in FIG. 2 is also referred to as a second positional relationship.
- the power transmission coil 24 is moved from the first height position to the second height position.
- the relative positional relationship among the power receiving coil 34, the power transmitting coil 24, and the magnetic body 27 is the positional relationship shown in FIG. This positional relationship is also referred to as a third positional relationship.
- FIG. 6 is a diagram illustrating the relationship between the frequency and the transmission power in the present embodiment.
- the frequency of FIG. 6 has shown the frequency of the electric power output from the power transmission coil 24.
- the transmitted power indicates the power transmitted from the power transmission coil 24 to the power reception coil 34. This transmission power is determined based on, for example, the transmission efficiency of power from the power transmission coil 24 to the power reception coil 34.
- the power transmission device 2 and the power reception device 3 are set based on the transmission efficiency. Still. Setting the power transmission device 2 and the power reception device 3 includes, for example, setting the frequency of power transmitted from the power transmission device 2, the impedance of the power transmission circuit 200 and the power reception circuit 300, and the like.
- the transmission efficiency is determined based on the resonance frequency or the like.
- the resonance frequencies f1 and f2 are determined based on, for example, the expressions (1) to (3).
- L indicates the inductance value of the power transmission circuit 200
- C indicates the capacitance value of the power transmission circuit 200
- k indicates a coupling coefficient between the power transmission coil 24 and the power reception coil 34.
- the value of the coupling coefficient k changes according to the transmission distance D indicating the distance between the power transmission coil 24 and the power reception coil 34.
- the natural resonance frequency f 0 varies according to the inductance value of the power transmission circuit 200. That is, the resonance frequencies f 1 and f 2, that is, the transmission efficiency varies depending on the transmission distance D and the inductance value of the power transmission circuit 200. Therefore, by changing the transmission distance D and the inductance of the power transmission circuit 200, it is possible to transmit or block power from the power transmission device 2 to the power reception device 3.
- the power transmitting device 2 and the power receiving device 3 transmit power when the relative positional relationship between the power receiving coil 34, the power transmitting coil 24, and the magnetic body 27 becomes the first positional relationship, and the power receiving coil 34, the power transmitting coil 24, and the magnetic material. It is set so that power is not transmitted when the relative positional relationship of the body 27 becomes the second and third positional relationships.
- FIG. 7 is a diagram illustrating hardware of the control device according to the present embodiment.
- FIG. 8 is a diagram illustrating functions of the control device according to the present embodiment.
- the control device 4 has a CPU (Central Processing Unit) 41, a communication device 42, a storage device 43, a display device 44, and an input device 45.
- the CPU 41 implements various functions of the control device 4 by executing a program stored in the storage device 43, and performs overall control of the control device 4.
- the storage device 43 stores the above-described program and various types of information.
- the display device 44 is a display that displays information of the control device 4.
- the input device 45 is, for example, a keyboard or a mouse for inputting information to the control device 4.
- the communication device 42 performs communication between the servo motor 51 and the measurement device 52.
- the control device 4 further includes a detection unit 46 and a control unit 47 (also referred to as “various functions of the control device 4”).
- the various functions of the control device 4 are realized by the CPU 41 executing programs stored in the storage device 43.
- the detection unit 46 detects an abnormality in the power transmission device 2 when receiving the cutoff signal.
- the cutoff signal may be transmitted from the measurement device 52 to the control device 4 or may be transmitted to the control device 4 via the input device 45 by the user of the power supply system 100.
- the control unit 47 moves the power transmission coil 24 to the first height position or the second height position based on the detection result of the detection unit 46.
- a power feeding system 100B in the second embodiment is obtained by changing the power transmission device 2 of the power feeding system 100 in the first embodiment to a power transmission device 2B.
- FIG. 9 is a cross-sectional view illustrating the power feeding system in a state where the power receiving device according to the present embodiment is provided at the first position.
- FIG. 10 is a cross-sectional view illustrating the power feeding system in a state where the power transmission coil in the present embodiment has moved to the second height position.
- symbol is attached
- the power feeding system 100B includes a power transmission device 2B.
- the casing 25B of the power transmission device 2B has long holes 253 and 254 that communicate from the inside of the casing 25B to the outside.
- the long holes 253 and 254 are provided on the side surface of the housing 25B along the vertical direction so that the knobs 243 and 244 can be moved in the vertical direction (Z-axis).
- the knobs 243 and 244 are used, for example, to cut off the power transmitted from the power transmission device 2B to the power reception device 3 manually by the user of the power supply system 100B.
- the knobs 243 and 244 are fixed to the outer surface of the power transmission coil 24.
- Operation When the relative positional relationship between the power receiving coil 34, the power transmitting coil 24, and the magnetic body 27 is set to the first positional relationship (FIG. 9) by the user of the power feeding system 100B, power is transmitted. When power is being transmitted, the relative positional relationship between the power receiving coil 34, the power transmitting coil 24, and the magnetic body 27 is set to the third positional relationship (FIG. 10) by the user of the power feeding system 100B. The power will be cut off. That is, it is possible to manually transmit and shut off power.
- the power transmission device 2 (first embodiment) includes the power transmission circuit 200, the magnetic body 27, and the moving devices 281 and 284.
- the power transmission circuit 200 includes a power transmission coil 24 for transmitting power to the power reception coil 34 of the power reception device 3.
- the magnetic body 27 is magnetically coupled to the power transmission coil 24.
- the moving devices 281 and 284 change the impedance of the power transmission circuit 200 by changing the relative positions of the magnetic body 27 and the power transmission coil 24 so that the power is cut off or transmitted. Therefore, the electric power supplied from the power transmission device 2 to the power reception device 3 can be cut off or transmitted. It is possible to prevent the power transmission device 2 from being damaged by supplying a current exceeding the rated current to the power transmission circuit 200. Therefore, the safety of the power feeding system 100 can be improved.
- the moving devices 281 and 284 move the power transmission coil 24 so that the power is cut off when receiving the cut-off signal for cutting off the electric power. Therefore, the power is automatically cut off based on the cut-off signal. Therefore, the safety of the power feeding system 100 can be improved.
- the magnetic body 27 is disposed so as to include the winding shaft 241 of the power transmission coil 24.
- the moving devices 281 and 284 move the power transmission coil 24 along the winding shaft 241. Therefore, the amount of change in the impedance of the power transmission circuit 200 due to the movement of the power transmission coil 24 can be increased, and the power can be reliably cut off.
- the magnetic body 27 has a shape in which the outer diameter of the magnetic body 27 is smaller than the inner diameter of the power transmission coil 24.
- the moving devices 281 and 284 transmit power so that the state changes from one state of the state in which the magnetic body 27 is surrounded by the power transmission coil 24 and the state in which the magnetic body 27 is not surrounded by the power transmission coil 24 to the other state.
- the coil 24 is moved. Therefore, the amount of change in the impedance of the power transmission circuit 200 due to the movement of the power transmission coil 24 can be further increased to cut off the power more reliably.
- the magnet 26 and the elastic device 291 as the moving device move the magnetic body 27 to transmit or cut off the electric power according to the position of the power receiving device 3. Therefore, it is possible to transmit or cut off electric power without performing, for example, turning on / off of a switch for controlling transmission or interruption of electric power. Therefore, it is possible to provide a power transmission device 2 that is easy to use.
- the power receiving device 3 includes a magnet 36.
- the magnet 26 of the power transmission device 2 is fixed to the magnetic body 27 so as to move together with the magnetic body 27 based on the magnetic force applied from the magnet 36.
- the elastic device 291 applies an elastic force to the magnetic body 27 in a direction opposite to the direction of the magnetic force described above.
- the elastic force of the elastic device 291 moves downward ( ⁇ Z) based on the magnetic force that the magnetic body 27 resists the elastic force to transmit power.
- the power receiving device 3 is provided at the second position that is farther away from the power transmission coil 24 than the first position and does not transmit power, the magnetic body 27 moves upward (+ Z) based on the elastic force to cut off the power. It is set to move towards.
- the magnetic body 27 can be moved based on a relatively simple mechanism including the magnet 26 and the elastic device 291. Therefore, for example, since it is not necessary to provide a distance sensor or the like that detects the distance between the power transmission device 2 and the power reception device 3, the manufacturing cost of the power transmission device 2 can be reduced. In addition, it is possible to provide the power transmission device 2 that is easy to use and does not require a power source for moving the magnetic body 27.
- the magnet 26 is fixed to the magnetic body 27 so as to be aligned with the magnetic body 27 in the moving direction (Z axis) of the magnetic body 27. Therefore, by reliably moving the magnetic body 27 in the moving direction, it is possible to reliably transmit or interrupt power.
- the magnetic body 27 is, for example, ferrite. Therefore, the relative permeability of the magnetic body 27 can be improved, and the amount of fluctuation in impedance of the power transmission circuit 200 can be increased.
- the magnetic body 27 is, for example, a coil. Therefore, the magnetic body 27 can be reduced in weight. Moreover, the relative permeability of the magnetic body 27 can be adjusted relatively easily by changing the number of turns of the coil.
- 1st and 2nd embodiment is for making an understanding of this invention easy, and is not for limiting and interpreting this invention.
- the present invention can be changed and improved without departing from the gist thereof, and the present invention includes equivalents thereof.
- the elastic device 291 applies an elastic force to the magnetic body 27, but the present invention is not limited to this.
- a spring or the like may directly apply an elastic force to the magnetic body 27.
- the power transmission device 2 and the power reception device 3 are transmitted when they are in the first positional relationship and are not transmitted when they are in the second and third positional relationships.
- the power transmitting device 2 and the power receiving device 3 may be set so that power is transmitted when the third positional relationship is reached and is not transmitted when the first positional relationship is reached.
- the power transmission coil 24 is set to the second positional relationship from the third positional relationship to the first positional relationship. It is good also as moving to a 1st height position from a height position.
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Abstract
Description
===給電システム===
以下、図1乃至図3を参照して、本実施形態における給電システムについて説明する。図1は、本実施形態における給電システムを示す透視図である。尚、説明の便宜上、筐体25、35は破線で示されている。図2は、本実施形態における給電システムを示す断面図である。尚、図2は、図1における給電システム100の略中央を通り且つXZ平面に平行な断面から+Y(紙面表から紙面裏)に向かって見た状態の給電システム100を示している。図3は、本実施形態における給電システムを示す図である。
<形状等>
送電装置2は、送電コイル24、筐体25、磁石26(第2磁石)、磁性体27、移動装置281、284、弾性装置291(「電力制御機構」とも称する)を有する。尚、磁石26、弾性装置291は移動装置に相当する。弾性装置291は、弾性体に相当する。
送電装置2は、電源21、インバータ22、コンデンサ23、制御装置4、サーボモータ51、測定装置52を更に有する。
<形状等>
受電装置3は、受電コイル34、筐体35、磁石36を有する。
受電装置3は、整流回路32、コンデンサ33を更に有する。
以下、図2乃至図5を参照して、本実施形態における電力の送電等について説明する。図4は、本実施形態における受電装置が第1位置に設けられた状態の給電システムを示す断面図である。図5は、本実施形態における送電コイルが第2高さ位置に移動した状態の給電システムを示す断面図である。尚、図4及び図5は、図2と同様な断面図である。
送電装置2から受電装置3に対して電力を送電する場合、受電装置3は、第1位置に設けられる。第1位置は、図4に示されるように、受電装置3の対向面351と送電装置2の対向面251とが接触する位置である。
送電装置2から受電装置3に対して電力を送電しない場合、受電装置3は、第2位置に設けられる。第2位置は、図2に示されるように、受電装置3が送電装置2から離れた位置である。つまり、第2位置は、受電装置3が第1位置よりも送電コイル24から離れている位置である。又、第2位置は、磁石36の磁力が磁石26に付与されない位置でもある。
送電装置2から受電装置3に対して送電されている電力を遮断する場合、送電コイル24は、第1高さ位置から第2高さ位置に移動される。この場合、受電コイル34、送電コイル24、磁性体27の相対的位置関係は、図5が示す位置関係となる。この位置関係を第3の位置関係とも称する。
以下、図2、図4乃至図6を参照して、本実施形態における送電装置及び受電装置の設定について説明する。図6は、本実施形態における周波数と伝送電力との関係を示す図である。尚、図6の周波数は、送電コイル24から出力される電力の周波数を示している。又、伝送電力とは、送電コイル24から受電コイル34へ伝送される電力を示している。尚、この伝送電力は、例えば、送電コイル24から受電コイル34への電力の伝送効率等に基づいて定まる。
伝送効率は、前述したように、共鳴周波数等に基づいて定まる。この共鳴周波数f1、f2は、例えば、式(1)乃至式(3)に基づいて定まる。
送電装置2及び受電装置3は、受電コイル34、送電コイル24、磁性体27の相対的位置関係が第1の位置関係となったときに送電され、且つ、受電コイル34、送電コイル24、磁性体27の相対的位置関係が第2及び第3の位置関係となったときに送電されないように設定される。
以下、図7及び図8を参照して、本実施形態における制御装置について説明する。図7は、本実施形態における制御装置のハードを示す図である。図8は、本実施形態における制御装置の機能を示す図である。
以下、図2、図4及び図5を参照して、本実施形態における給電システムの動作について説明する。
送電装置2から受電装置3に対して電力を送電しない場合、受電装置3は、第2位置に設けられる。受電コイル34、送電コイル24、磁性体27の相対的位置関係が第2の位置関係となり、伝送効率が低下して、電力が送電されない状態になる。
送電装置2から受電装置3に対して電力を送電する場合、受電装置3は、第1位置に設けられる。更に、この場合、送電コイル24が第1高さ位置に移動される。受電コイル34、送電コイル24、磁性体27の相対的位置関係が第1の位置関係となり、伝送効率が向上して、電力が送電される。
送電装置2から受電装置3に対して電力が送電されているときに当該電力を遮断する場合、送電コイル24が第1高さ位置から第2高さ位置に移動される。受電コイル34、送電コイル24、磁性体27の相対的位置関係が第3の位置関係となり、伝送効率が低下して、電力が遮断される。
第2実施形態における給電システム100Bは、第1実施形態における給電システム100の送電装置2を送電装置2Bに変更したものである。
以下、図9及び図10を参照して、本実施形態における給電システムについて説明する。図9は、本実施形態における受電装置が第1位置に設けられた状態の給電システムを示す断面図である。図10は、本実施形態における送電コイルが第2高さ位置に移動した状態の給電システムを示す断面図である。尚、図9、図10夫々における図4、図5と同様な構成には、同様な符号を付しその説明については省略する。
給電システム100Bは、送電装置2Bを有する。送電装置2Bの筐体25Bには、筐体25Bの内部から外部に通じる長孔253、254を有する。長孔253、254は、つまみ243、244を上下方向(Z軸)において移動させることができるように、上下方向に沿って筐体25Bの側面に設けられる。
給電システム100Bのユーザの手動により、受電コイル34、送電コイル24、磁性体27の相対的位置関係が第1の位置関係(図9)とされた場合、電力の送電が行われる。電力の送電が行われているときに、給電システム100Bのユーザの手動により、受電コイル34、送電コイル24、磁性体27の相対的位置関係が第3の位置関係(図10)とされた場合、電力が遮断されることになる。つまり、手動により電力を送電したり遮断したりするのが可能になる。
送電装置2から受電装置3Bに対して電力を送電する場合、受電装置3Bは、第1位置に設けられる。更に、この場合、送電コイル24が第1高さ位置に移動される。受電コイル34、送電コイル24、磁性体27の相対的位置関係が第1の位置関係となり、伝送効率が向上して、電力が送電される。
送電装置2から受電装置3に対して電力が送電されているときに当該電力を遮断する場合、つまみ243、244に付与される移動力に基づいて、送電コイル24が第1高さ位置から第2高さ位置に移動される。受電コイル34、送電コイル24、磁性体27の相対的位置関係を、第3の位置関係となり、伝送効率が低下して、電力が遮断される。
3 受電装置
4 制御装置
24 送電コイル
26、36 磁石
34 受電コイル
100、100B 給電システム
281、284 移動装置
291 弾性装置
Claims (10)
- 受電装置の受電コイルに対して電力を送電するための送電コイルを有する送電回路と、
前記送電コイルとの間で磁気的に結合される磁性体と、
前記電力が遮断又は送電されるように、前記磁性体と前記送電コイルとの相対的位置を変化させて、前記送電回路のインピーダンスを変化させる移動装置と、
を備えたことを特徴とする送電装置。 - 前記移動装置は、前記電力を遮断するための遮断信号を受信した際に、前記電力が遮断されるように前記送電コイルを移動させる
ことを特徴とする請求項1に記載の送電装置。 - 前記磁性体は、前記送電コイルの巻回軸を含むように配置されており、
前記移動装置は、前記巻回軸に沿って前記送電コイルを移動させる
ことを特徴とする請求項2に記載の送電装置。 - 前記磁性体は、前記磁性体の外径が前記送電コイルの内径よりも小さい形状を呈しており、
前記移動装置は、前記磁性体が前記送電コイルに取り囲まれている状態及び前記磁性体が前記送電コイルに取り囲まれていない状態のうちの一方の状態から他方の状態となるように、前記送電コイルを移動させる
ことを特徴とする請求項3に記載の送電装置。 - 前記移動装置は、前記受電装置の位置に応じて前記電力を送電又は遮断するべく前記磁性体を移動させる
ことを特徴とする請求項1に記載の送電装置。 - 前記受電装置は、第1磁石、を有し、
前記移動装置は、
前記第1磁石から付与される磁力に基づいて前記磁性体とともに移動するように前記磁性体に固定される第2磁石と、
前記磁性体に対して前記磁力の向きとは反対向きの弾性力を付与する弾性体と、を有し、
前記弾性力は、前記電力が送電される第1位置に前記受電装置が設けられた場合、前記電力を送電するべく前記磁性体が前記弾性力に抗する前記磁力に基づいて移動し、前記第1位置よりも前記送電コイルから離れており前記電力が送電されない第2位置に前記受電装置が設けられた場合、前記電力を遮断するべく前記磁性体が前記弾性力に基づいて移動するように、設定されている
ことを特徴とする請求項5に記載の送電装置。 - 前記第2磁石は、前記磁性体の移動方向において前記磁性体と並ぶように固定される
ことを特徴とする請求項6に記載の送電装置。 - 前記磁性体は、フェライトである
ことを特徴とする請求項1乃至7の何れかに記載の送電装置。 - 前記磁性体は、コイルである
ことを特徴とする請求項1乃至7の何れかに記載の送電装置。 - 受電コイルを有する受電装置と、
前記受電コイルに対して電力を送電する送電装置と、を備え、
前記送電装置は、
前記受電コイルに対して電力を送電するための送電コイルを有する送電回路と、
前記送電コイルとの間で磁気的に結合される磁性体と、
前記電力が遮断又は送電されるように、前記磁性体と前記送電コイルとの相対的位置を変化させて、前記送電回路のインピーダンスを変化させる移動装置と、を有する
ことを特徴とする給電システム。
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EP13899032.0A EP3089320A4 (en) | 2013-12-10 | 2013-12-10 | POWER TRANSMISSION DEVICE AND POWER SUPPLY SYSTEM |
PCT/JP2013/083133 WO2015087399A1 (ja) | 2013-12-10 | 2013-12-10 | 送電装置、給電システム |
US15/102,439 US20160329750A1 (en) | 2013-12-10 | 2013-12-10 | Power transmission device and power feeding system |
JP2014511644A JP5579952B1 (ja) | 2013-12-10 | 2013-12-10 | 送電装置、給電システム |
CN201380081569.9A CN105850005A (zh) | 2013-12-10 | 2013-12-10 | 送电装置以及供电*** |
KR1020167014899A KR20160096085A (ko) | 2013-12-10 | 2013-12-10 | 송전 장치, 급전 시스템 |
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WO2022211188A1 (ko) * | 2021-03-30 | 2022-10-06 | 주식회사 위츠 | 호환성을 갖는 무선충전용 무선전력송신장치 |
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US10819157B2 (en) * | 2016-12-13 | 2020-10-27 | Continental Automotive France | Method for charging a mobile terminal with a mobile device with which a motor vehicle is intended to be equipped and associated charging device |
Also Published As
Publication number | Publication date |
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EP3089320A1 (en) | 2016-11-02 |
CN105850005A (zh) | 2016-08-10 |
JPWO2015087399A1 (ja) | 2017-03-16 |
EP3089320A4 (en) | 2016-12-28 |
JP5579952B1 (ja) | 2014-08-27 |
KR20160096085A (ko) | 2016-08-12 |
US20160329750A1 (en) | 2016-11-10 |
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