JP2021061727A - Wireless power transmission system, power transmission device, and wheel stopper block - Google Patents

Abstract

To provide a wireless power supply system, a power transmission device, and a wheel stopper block that can improve the usefulness of a wireless power supply technology that supplies power wirelessly to a mobile body.SOLUTION: A wireless power supply system 1 includes a wheel stopper block 7, a power transmission device 2, and a power reception device 3. The wheel stopper block 7 is installed in a space where a mobile object 5 can be parked or stopped and includes a wheel stopper 71 that comes into contact with wheels 6 of the mobile object 5 to prevent the movement of the mobile object 5. The power transmission device 2 includes a power transmission coil 21 that transmits power wirelessly, and at least a part of the power transmission coil 21 is housed in the wheel stopper block 7. The power reception device 3 includes a power reception coil 31 that receives power wirelessly and is installed in the mobile body 5.SELECTED DRAWING: Figure 1

Description

The present invention relates to a wireless power supply system, a power transmission device, and a wheel chock block.

Conventionally, there is known a wireless power supply technology in which a power transmission device installed on a road surface such as a road wirelessly supplies electric power to a power receiving device installed in a vehicle. For example, Patent Document 1 discloses a vehicle capable of receiving electric power from a power transmission device provided on a road surface by providing a power receiving device on the lower side of the vehicle.

Japanese Unexamined Patent Publication No. 2018-088077

However, in the conventional wireless power feeding technology, when the power transmission device installed on the road surface such as a road and the power receiving device installed on the moving body on the road surface are separated from each other, the power transmitting device and the power receiving device are separated from each other. An obstacle such as a small animal or metal may enter the space between them, and an eddy current may be generated around the obstacle to reduce the power transmission efficiency. In addition, small animals or metals that have entered between the power transmission device and the power reception device may be heated and ignite. Therefore, there is a demand for further improvement in the usefulness of the wireless power supply technology that wirelessly supplies electric power to the mobile body.

An object of the present invention made in view of such circumstances is to provide a wireless power supply system, a power transmission device, and a wheel chock block capable of improving the usefulness of wireless power supply.

The wireless power supply system according to the present invention
A wheel chock block that is installed in a space where a moving body can be parked or stopped, and includes a wheel chock portion that contacts the wheels of the moving body and hinders the movement of the moving body.
A power transmission device comprising a power transmission coil that transmits electric power wirelessly, and at least a part of the power transmission coil is housed in the wheel chock block.
A power receiving device provided on the mobile body, which is provided with a power receiving coil that receives power wirelessly, and a power receiving device.
including.
According to the wireless power supply system according to the present invention, the power transmission coil is housed in the wheel chock block that comes into contact with the wheels of the moving body while the moving body is parked or stopped, so that the space between the power transmitting coil and the power receiving coil is accommodated. It is possible to reduce the possibility that an obstacle will enter the wheel and improve the power supply efficiency in wireless power transmission. Therefore, according to the wireless power supply system according to the present invention, the usefulness of the wireless power supply technology that wirelessly supplies electric power to the mobile body is improved.

In the wireless power feeding system according to the present invention, it is preferable that at least a part of the power transmission coil is housed in the wheel chock portion.
According to such a configuration, the wireless power feeding system can transmit electric power from the wheel chock to the power receiving device of the moving body that parks or stops by bringing the wheel into contact with the wheel chock, and the power transmission coil during power feeding. It is possible to further reduce the risk of obstacles entering the space between the power receiving coil and the power receiving coil.

In the wireless power supply system according to the present invention, the wheel chock block further includes a side wall portion located on the outer side in the width direction of the wheel in a state where the wheel of the moving body is in contact with the wheel chock portion, and the power transmission is performed. It is preferable that at least a part of the coil is housed in the side wall portion.
According to such a configuration, the wireless power supply system can transmit electric power from the outside in the width direction of the moving body to the power receiving device of the moving body that parks or stops by bringing the wheel into contact with the wheel chock portion, and the wheel can be used. It is possible to reduce the risk of damage to the power transmission device due to the load from the wheels by traveling or stopping above the power transmission device.

In the wireless power transmission system according to the present invention, the wheel chock block is embedded in the space so as to be located under the wheel in a state where the wheel of the moving body is in contact with the wheel chock portion. It is preferable that a portion is further provided and at least a part of the power transmission coil is housed in the embedded portion.
According to such a configuration, the wireless power supply system can transmit electric power from the lower side of the wheel to the power receiving device of the moving body that parks or stops by bringing the wheel into contact with the wheel chock, and the electric power is transmitted during the power supply. The risk of obstacles entering the space between the coil and the power receiving coil can be further reduced.

In the wireless power supply system according to the present invention, it is preferable that the power transmission device wirelessly transmits power when it is determined that the power receiving device exists at a position where the power can be received from the power transmission device.
According to such a configuration, the wireless power supply system can reduce the power consumption due to the power transmission device transmitting power wirelessly when the power receiving device is not present at a position where it can receive power.

In the wireless power feeding system according to the present invention, it is preferable that at least a part of the power receiving coil is housed in the wheel of the moving body.
According to such a configuration, the wireless power feeding system can bring the power receiving coil close to the power transmitting coil housed in the wheel chock block, further reducing the risk of obstacles entering the space between the power transmitting coil and the power receiving coil. Can be done.

In the wireless power supply system according to the present invention, the wheel is preferably a tire / wheel assembly composed of a tire and a wheel.
According to such a configuration, the wireless power supply system reduces the risk of obstacles entering the space between the power transmission coil and the power reception coil by partitioning the internal space of the wheel from the outside of the wheel by the tire and the wheel. Can be done.

The power transmission device according to the present invention
Equipped with a power transmission coil that transmits power wirelessly
At least a part of the power transmission coil is a wheel chock block installed in a space where the moving body can be parked or stopped, and includes a wheel chock portion that contacts the wheels of the moving body and prevents the moving body from moving. , Housed in a wheel chock block.
According to the power transmission device according to the present invention, electric power can be transmitted wirelessly while a mobile body equipped with a power receiving device is parked or stopped. Further, according to the power transmission device according to the present invention, since the power transmission coil is housed in the wheel chock block that comes into contact with the wheels of the moving body, there is a possibility that an obstacle may enter the space between the power transmission coil and the power reception coil. It can be reduced and the power transmission efficiency in wireless power transmission can be improved. Therefore, according to the power transmission device according to the present invention, the usefulness of the wireless power feeding technique for wirelessly supplying electric power to the mobile body is improved.

The wheel chock block according to the present invention
A wheel chock block installed in a space where a moving body can be parked or stopped.
A wheel chock that comes into contact with the wheels of the moving body and hinders the movement of the moving body.
A power transmission device comprising a power transmission coil that transmits electric power wirelessly, and at least a part of the power transmission coil is housed in the wheel chock block.
To be equipped.
According to the wheel chock block according to the present invention, electric power can be transmitted wirelessly while a moving body equipped with a power receiving device is parked or stopped. Further, according to the wheel chock block according to the present invention, since the power transmission coil is housed in the wheel chock block that comes into contact with the wheels of the moving body, there is a possibility that an obstacle may enter the space between the power transmission coil and the power reception coil. Can be reduced, and the power feeding efficiency in wireless power feeding can be improved. Therefore, according to the wheel chock block according to the present invention, the usefulness of the wireless power feeding technique for wirelessly supplying electric power to the moving body is improved.

According to the present invention, it is possible to provide a wireless power supply system, a power transmission device, and a wheel chock block that can improve the usefulness of a wireless power supply technology that wirelessly supplies electric power to a mobile body.

It is the schematic which shows schematicly which shows the wireless power supply system which concerns on 1st Embodiment of this invention by using the cross section in the width direction of a parking space. It is a perspective view which shows typically the wireless power supply system which concerns on 1st Embodiment of this invention. FIG. 5 is a schematic view schematically showing a tire / wheel assembly as an example of a wheel in the wireless power feeding system according to the first embodiment of the present invention, using a cross section in the width direction of the wheel. It is a functional block diagram which shows schematic the structural example of the power transmission apparatus which concerns on 1st Embodiment of this invention. It is the schematic which shows the coil surface of the power transmission coil provided in the power transmission apparatus which concerns on 1st Embodiment of this invention, and the inclination thereof substantially by using the longitudinal section of the parking space. It is a functional block diagram which shows schematic the structural example of the power receiving device which concerns on 1st Embodiment of this invention. It is the schematic which shows the coil surface of the power receiving coil provided in the power receiving device which concerns on 1st Embodiment of this invention, and the inclination thereof substantially by using the longitudinal section of the parking space. It is the schematic which shows the wireless power supply system which concerns on the 2nd Embodiment of this invention schematic by using the cross section in the width direction of the parking / stopping space. It is a perspective view which shows typically the wireless power supply system which concerns on 2nd Embodiment of this invention. It is the schematic which shows the wireless power supply system which concerns on 3rd Embodiment of this invention by using the cross section in the width direction of a parking space. It is a perspective view which shows typically the wireless power supply system which concerns on 3rd Embodiment of this invention.

Hereinafter, the wireless power supply system, the power transmission device, and the wheel chock block according to the embodiment of the present invention will be described with reference to the drawings. The same reference numerals are given to common parts and parts in each figure. In the present specification, the width direction of the wheel means a direction parallel to the rotation axis of the wheel. The radial direction of the wheel means a direction orthogonal to the rotation axis of the wheel. The width direction of the moving body means a direction orthogonal to the traveling direction of the moving body. The width direction of the parking / stopping space is a direction substantially parallel to the width direction of the moving body parked or parked in the parking / stopping space. The longitudinal direction of the parking / stopping space is a direction orthogonal to the width direction.

(Wireless power supply system configuration)
The configuration of the wireless power supply system 1A, which is the first embodiment of the wireless power supply system 1 according to the present invention, will be described with reference to FIGS. 1 and 2. FIG. 1 is a schematic view schematically showing a wireless power supply system 1A using a cross section in the width direction of a parking / stopping space 4. FIG. 2 is a perspective view schematically showing the wireless power feeding system 1A.

As shown in FIG. 1, the wireless power supply system 1A includes a power transmission device 2 and a power reception device 3. The power transmission device 2 of the present embodiment is housed in a wheel chock block 7A installed in a space 4 where the moving body 5 can be parked or stopped. However, it is sufficient that at least a part of the power transmission coil 21 described later of the power transmission device 2 is housed in the wheel chock block 7A, and the entire power transmission device 2 may not be housed in the wheel chock block 7A. Hereinafter, the "space 4 in which the moving body 5 can park or stop" is also simply referred to as the "parking / stopping space 4". The power receiving device 3 is installed in the moving body 5. As a result, in the wireless power supply system 1A, when the mobile body 5 is parked or stopped in the parking / stopping space 4, electric power is wirelessly transmitted from the power transmission device 2 to the power receiving device 3. In the present embodiment, the moving body 5 will be described as, for example, an automobile.

As shown in FIG. 2, the parking / stopping space 4 is a space in which the moving body 5 can park or stop. The parking / stopping space 4 is provided on the surface of, for example, a parking lot. However, the parking / stopping space 4 is not limited to the parking lot, and may be provided on the surface of a roadway, a sidewalk, a farm road, a forest road, a runway, a vacant lot, a plaza, or the like. A lane marking such as a white line may be drawn on the surface of the parking lot or the like to indicate the parking / stopping space 4.

In the present embodiment, the surface of the parking / stopping space 4 is paved with, for example, asphalt. However, the surface of the parking / stopping space 4 is not limited to asphalt, and may be made of concrete, stone, brick, soil, gravel, or the like.

The wheel chock block 7A is installed in the parking / stopping space 4. In FIG. 2, assuming that the moving body 5 is an automobile, a pair of wheel chock blocks 7A are arranged in the width direction of the parking / stopping space 4 in the vicinity of one end in the longitudinal direction of one parking / stopping space 4. An example of being installed side by side is shown. However, the number of wheel chock blocks 7A installed in one parking / stopping space 4 can be any number of one or more.

Referring to FIG. 1 again, the wheel chock block 7A includes a wheel chock portion 71 and a buried portion 72. The wheel chock portion 71 projects upward in the direction perpendicular to the surface of the parking / stopping space 4 in a state where the wheel chock block 7A is installed in the parking / stopping space 4. The shape of the wheel chock 71 is, for example, a rectangular parallelepiped, but the shape is not limited to this. The wheel chock 71 contacts the wheels 6 of the moving body 5 and hinders the movement of the moving body 5. As a result, by stopping the moving body 5 so that the wheels 6 of the moving body 5 come into contact with the wheel chock 71, the moving body 5 can be parked or stopped in the parking / stopping space 4. The buried portion 72 is buried below the surface of the parking / stopping space 4 with the wheel chock block 7A installed in the parking / stopping space 4. The shape of the buried portion 72 is a rectangular parallelepiped like the shape of the wheel chock portion 71, but the shape is not limited to this. In the present embodiment, in order to stably install the wheel chock block 7A in the parking / stopping space 4, the wheel chock block 7A includes a buried portion 72, but the buried portion 72 may be omitted. When the wheel chock block 7A does not include the buried portion 72, the wheel chock block 7A can be easily installed on the surface of the parking / stopping space 4.

In this embodiment, the wheel chock block 7A is made of, for example, concrete. However, the wheel chock block 7A is not limited to concrete, and may be formed of asphalt, stone, brick, soil, gravel, or the like.

At least a part of the wheel chock block 7A may be made of a non-magnetic material. Non-magnetic materials may include paramagnetic and diamagnetic materials with low magnetic permeability. As the non-magnetic material, for example, a resin material containing a thermoplastic resin such as polyester and nylon, a thermosetting resin such as vinyl ester resin and unsaturated polyester resin, and other synthetic resins can be used. The resin material can further contain fibers such as glass, carbon, graphite, aramid, polyethylene, and ceramic as reinforcing fibers. As the non-magnetic material, not only resin but also any non-metal material including rubber, glass, carbon, graphite, aramid, polyethylene, ceramic and the like can be used. Further, as the non-magnetic material, a metal material containing a paramagnetic material such as aluminum or a diamagnetic material such as copper can be used. As a result, the magnetic field generated by the power transmission coil 21 is less likely to be attenuated when passing through the wheel chock block 7A.

The power transmission device 2 includes a power transmission coil 21. The power transmission device 2 wirelessly transmits electric power by the power transmission coil 21. In the present embodiment, at least a part of the power transmission coil 21 is housed in the wheel chock 71. In FIG. 1, the power transmission coil 21 is schematically shown for the sake of brevity.

The power receiving device 3 includes a power receiving coil 31. The power receiving coil 31 receives electric power transmitted wirelessly from the power transmitting coil 21 of the power transmitting device 2. The power receiving device 3 is installed in the moving body 5. In the present embodiment, at least a part of the power receiving coil 31 is housed in the wheel 6 of the moving body 5. In the present embodiment, the power receiving device 3 is attached to the wheel 6 of the moving body 5 so that at least a part of the power receiving coil 31 is housed in the wheel 6 of the moving body 5. However, the power receiving device 3 may be attached to the main body of the moving body 5 so that at least a part of the power receiving coil 31 is housed in the wheels 6 of the moving body 5. In FIG. 1, the power receiving coil 31 is schematically shown for the sake of brevity.

The moving body 5 travels on the wheels 6. In the present embodiment, the moving body 5 is an automobile whose power source includes a motor, such as an electric vehicle or a hybrid vehicle. Automobiles include passenger cars, trucks, buses, motorcycles and the like. However, the moving body 5 is not limited to automobiles, but includes agricultural vehicles such as tractors, construction or construction vehicles such as dump trucks, airplanes, helicopters, motorized bicycles, electric bicycles, and electric wheelchairs.

The wheels 6 are used for moving the moving body 5. The wheel 6 has a ground contact surface in contact with the surface of the parking / stopping space 4 in a state of being attached to the moving body 5. In the present embodiment, the wheel 6 is a tire / wheel assembly in which the tire 61 is mounted on the wheel 62, but the present invention is not limited to this. In the present specification, the "contact patch" of the wheel 6 is the contact patch of the tire 61, that is, the tire 61 is mounted on the applicable rim and filled with the specified internal pressure when the wheel 6 is a tire / wheel assembly. The surface of the tire 61 in contact with the surface of the parking / stopping space 4 when a load is applied.

In the present specification, the "applicable rim" is an industrial standard effective in the area where pneumatic tires are produced and used. In Japan, JATMA (Japan Automobile Tire Association) JATMA YEAR BOOK, and in Europe, ETRTO (ETRTO) The size described or applied in the STANDARDS MANUAL of The European Tire and Rim Technical Organization, YEAR BOOK in YEAR BOOK of TRA (The Tire and Rim Association, Inc.) in the United States, etc. STANDARDS MANUAL refers to the Measuring Rim, and TRA's YEAR BOOK refers to the Design Rim), but in the case of sizes not listed in these industrial standards, it refers to the rim with a width corresponding to the bead width of the pneumatic tire. "Applicable rims" include sizes that may be included in the aforementioned industrial standards in the future in addition to current sizes. As an example of the "size described in the future", the size described as "FUTURE DEVELOPMENTS" in the ETRTO 2013 edition can be mentioned.

In the present specification, the "specified internal pressure" refers to the air pressure (maximum air pressure) corresponding to the maximum load capacity of a single wheel in the applicable size and ply rating described in the above-mentioned industrial standards such as JATMA YEAR BOOK. In the case of a size not described in the above-mentioned industrial standards, it means the air pressure (maximum air pressure) corresponding to the maximum load capacity specified for each vehicle equipped with tires. Further, in the present specification, the "maximum load" means a load corresponding to the maximum load capacity of a tire of an applicable size described in the above-mentioned industrial standard, or a size not described in the above-mentioned industrial standard. Means the load corresponding to the maximum load capacity specified for each vehicle equipped with tires.

FIG. 3 is a schematic view schematically showing a tire / wheel assembly as an example of the wheel 6 in the wireless power feeding system 1A according to the first embodiment of the present invention, using a cross section in the width direction of the wheel 6. It is shown.

As shown in FIG. 3, the tire 61 has a pair of bead portions 611, a pair of sidewall portions 612, and a tread portion 613. The bead portion 611 is configured such that when the tire 61 is attached to the rim portion 621 of the wheel 62, the radial inner side and the widthwise outer side of the bead portion 611 are in contact with the rim portion 621. The sidewall portion 612 extends between the tread portion 613 and the bead portion 611. The sidewall portion 612 is located on the radial outer side of the wheel 6 with respect to the bead portion 611. The tread portion 613 is located on the radial outer side of the wheel 6 with respect to the sidewall portion 612, and includes the ground contact surface of the tire 61.

The tire 61 is made of rubber such as natural rubber and synthetic rubber, and may include parts made of metal such as steel such as carcass, belts and bead wires. For example, at least a part of parts such as carcass, belt and bead wire may be formed of the above-mentioned non-magnetic material. As a result, the tire 61 maintains the strength of the tire 61, and the presence of metal between the power transmission device 2 and the power reception device 3 causes the magnetic field generated by the power transmission coil 21 to reach the power reception coil 31. It is possible to reduce the attenuation and, by extension, improve the power supply efficiency of the wireless power supply from the power transmission device 2 to the power reception device 3. However, at least a part of parts such as carcass, belt and bead wire may not be made of non-magnetic material.

The wheel 62 is supported by a cylindrical rim portion 621 for mounting the tire 61, a hub portion 622 provided on the radial inside of the rim portion 621 and fixed to the shaft 52 of the moving body 5, and a hub portion 622. It has a disk portion 623 that is fixed and supports and fixes the rim portion 621.

The wheel 62 may be made of a metal such as steel, but is not limited to this. At least a part of the rim portion 621, the hub portion 622, and the disc portion 623 of the wheel 62 may be formed of the above-mentioned non-magnetic material. As a result, while maintaining the strength of the wheel 62, the presence of a metal such as steel between the power transmission device 2 and the power reception device 3 causes the magnetic field generated by the power transmission coil 21 to be attenuated by the time it reaches the power reception coil 31. As a result, it is possible to improve the power supply efficiency of the wireless power supply from the power transmission device 2 to the power reception device 3. However, at least a part of the rim portion 621, the hub portion 622, and the disc portion 623 of the wheel 62 may not be formed of a non-magnetic material.

In FIG. 3, the power receiving device 3 is attached to the hub portion 622 of the wheel 62. In this state, at least a part of the power receiving coil 31 is housed in the wheel 6. "Accommodated in a wheel" means that it is arranged radially inside the outer peripheral surface of the wheel and inside both ends in the width direction of the wheel. In the present embodiment, most of the power receiving coil 31 is housed in the wheel 6.

The power receiving device 3 is installed at a portion of the wheel 6 that does not rotate with the rotation of the wheel 6, such as a cover of the hub portion 622 of the wheel 62. As a result, the power receiving device 3 does not change the relative position of the power receiving coil 31 inside the wheel 6 according to the rotation of the tire 61, so that it is easy to stably supply electric power wirelessly from the outside of the wheel 6. become.

The ratio of the portion of the entire power receiving coil 31 housed in the wheel 6 of the moving body 5 may be arbitrarily determined. The larger the proportion of the portion accommodated in the wheel 6 in the entire power receiving coil 31, the more difficult it is for an obstacle to enter the space between the power transmitting coil 21 and the power receiving coil 31 during power supply from the power transmission coil 21. On the other hand, as the proportion of the portion accommodated in the wheel 6 in the entire power receiving coil 31 becomes smaller, the magnetic field generated by the power transmitting coil 21 reaches the power receiving coil 31 during power supply from the power transmission coil 21. Hard to decay.

The power receiving device 3 is not limited to the hub portion 622 of the wheel 62, and may be installed at an arbitrary position on the wheel 6. The power receiving device 3 may be installed on, for example, the inner peripheral surface of the rim portion 621 of the wheel 62 or the outer peripheral surface of the rim portion 621. Further, the power receiving device 3 may be installed on the inner peripheral surface of the tread portion 613 of the tire 61, or may be installed inside the tread portion 613 of the tire 61. When the moving body 5 is parked or stopped in the parking / stopping space 4, the power receiving device is located at a position where the distance between the power transmitting coil 21 and the power receiving coil 31 of the power transmitting device 2 installed in the parking / stopping space 4 becomes shorter. By installing 3, the power supply efficiency can be further improved.

(Configuration of power transmission device)
Next, the configuration of the power transmission device 2 included in the wireless power supply system 1A according to the first embodiment of the present invention will be described with reference to FIGS. 4 and 5.

FIG. 4 shows a functional block diagram schematically showing a configuration example of the power transmission device 2 according to the first embodiment of the present invention. As shown in FIG. 4, in addition to the power transmission coil 21, the power transmission device 2 includes a power conversion unit 22, a power storage unit 23, a detection unit 24, a communication unit 25, a storage unit 26, and a control unit 27. The power transmission coil 21, the power conversion unit 22, the power storage unit 23, the detection unit 24, the communication unit 25, the storage unit 26, and the control unit 27 are connected to each other by wire or wirelessly via a network such as a LAN (Local Area Network). It is connected so that it can communicate.

The power transmission coil 21 generates an alternating magnetic field. In the present embodiment, the power transmission coil 21 is configured as a whole in an annular shape. In the present specification, the plane surrounded by the annular power transmission coil 21 is also referred to as the coil surface S1 of the power transmission coil 21. In other words, the power transmission coil 21 is wound in the in-plane direction of the coil surface S1 so as to form the coil surface S1. The power transmission coil 21 can generate an alternating magnetic field in a direction perpendicular to the power transmission coil 21, that is, in a direction in which the perpendicular line of the coil surface S1 extends.

FIG. 5 is a schematic view schematically showing a coil surface S1 of a power transmission coil 21 included in the power transmission device 2 according to the first embodiment of the present invention and its inclination using a longitudinal cross section of a parking / stopping space 4. It is shown. As shown in FIG. 5, in the state where the power transmission device 2 is installed in the parking / stopping space 4, the vertical line V of the coil surface S1 of the power transmission coil 21 is the parking / stopping space 4 in the longitudinal cross section of the parking / stopping space 4. It is configured to have an inclination with respect to the perpendicular line on the surface. In other words, the coil surface S1 of the power transmission coil 21 is inclined with respect to the surface of the parking / stopping space 4 in the longitudinal cross section of the parking / stopping space 4 while being installed in the parking / stopping space 4. More specifically, in the power transmission coil 21, with the power transmission device 2 installed in the parking / stopping space 4, the vertical line V of the coil surface S1 is the surface of the parking / stopping space 4 in the longitudinal cross section of the parking / stopping space 4. It is supported and fixed to the housing of the power transmission device 2 via the support member 211 so as to have an inclination θ1 with respect to the perpendicular line. The inclination θ1 may be set at an arbitrary angle according to the installation position of the power transmission coil 21 and the power reception coil 31, the amount of power to be received, and the like. At least a part of the housing of the support member 211 and the power transmission device 2 may be made of the above-mentioned non-magnetic material. As a result, the magnetic field generated by the power transmission coil 21 is less likely to be attenuated when passing through the housing of the support member 211 and the power transmission device 2.

With reference to FIG. 4 again, the power conversion unit 22 is connected to the power transmission coil 21. The power conversion unit 22 includes, for example, an AC / DC converter, an inverter, and the like. The power conversion unit 22 converts the power transmitted from the power source P or the power storage unit 23 outside the power transmission device 2 and transmits the power to the power transmission coil 21.

The power storage unit 23 is connected to the power conversion unit 22. The power storage unit 23 includes, for example, a chargeable and dischargeable storage battery such as a lead storage battery, a nickel hydrogen storage battery, a lithium ion battery, and a sodium-sulfur battery. The power storage unit 23 is not limited to the storage battery, and may include a capacitor or the like. The power storage unit 23 stores the power transmitted from the power source P or transmits the power to the power transmission coil 21 via the power conversion unit 22.

The detection unit 24 includes sensors such as an infrared sensor, an image sensor, a motion sensor, and a pressure sensor. The detection unit 24 detects that the power receiving device 3 exists at a position where power can be received from the power transmitting device 2.

The communication unit 25 includes one or more communication modules. The communication module is, for example, a wired LAN communication module, a wireless LAN communication module, a CAN (Controller Area Network) communication module, or the like. The communication unit 25 realizes communication with an external computer or the like via a network such as the Internet.

The storage unit 26 is, for example, a semiconductor memory, a magnetic memory, an optical memory, or the like. The storage unit 26 functions as, for example, a main storage device, an auxiliary storage device, or a cache memory. The storage unit 26 stores arbitrary information used for the operation of the power transmission device 2. For example, the storage unit 26 stores a system program, an application program, embedded software, and the like.

The control unit 27 includes one or more processors. The processor may be, for example, a general-purpose processor such as a CPU (Central Processing Unit), a dedicated processor specialized for a specific process, or the like. The control unit 27 is not limited to the processor, and may include one or more dedicated circuits. The dedicated circuit may be, for example, an FPGA (Field-Programmable Gate Array) or an ASIC (Application Specific Integrated Circuit). The control unit 27 controls the power transmission coil 21, the power conversion unit 22, the power storage unit 23, the detection unit 24, the communication unit 25, and the storage unit 26 to realize the function of the power transmission device 2.

The control unit 27 can determine whether or not the power receiving device 3 exists at a position where power can be received from the power transmission device 2. Specifically, the control unit 27 detects the power receiving device 3 by the detecting unit 24, and determines that the power receiving device 3 exists at a position where the power receiving device 3 can receive power from the power transmitting device 2. The control unit 27 may indirectly determine that the power receiving device 3 exists at a position where power can be received from the power transmission device 2 by detecting the moving body 5 or the wheel 6 by the detection unit 24. Alternatively, the control unit 27 may acquire information indicating that the power receiving device 3 is present at a position where the power receiving device 3 can receive power from the power transmitting device 2 from the power receiving device 3 or an external computer via the communication unit 25.

When the control unit 27 determines that the power receiving device 3 exists at a position where power can be received from the power transmitting device 2, the control unit 27 can transmit power wirelessly. Specifically, the control unit 27 controls at least one of the power transmission coil 21, the power conversion unit 22, and the power storage unit 23 to generate an alternating magnetic field in the direction in which the perpendicular line of the coil surface S1 of the power transmission coil 21 extends. Can be generated.

(Configuration of power receiving device)
Next, the configuration of the power receiving device 3 included in the wireless power feeding system 1A according to the first embodiment of the present invention will be described with reference to FIGS. 6 and 7.

FIG. 6 shows a functional block diagram schematically showing a configuration example of the power receiving device 3 according to the first embodiment of the present invention. As shown in FIG. 6, in addition to the power receiving coil 31, the power receiving device 3 includes a power conversion unit 32, a power storage unit 33, a detection unit 34, a communication unit 35, a storage unit 36, and a control unit 37. The power receiving coil 31, the power conversion unit 32, the power storage unit 33, the detection unit 34, the communication unit 35, the storage unit 36, and the control unit 37 are connected to each other by wire or wirelessly via a network such as CAN. ing.

The power receiving coil 31 receives electric power wirelessly. In the present embodiment, the power receiving coil 31 is formed in an annular shape as a whole. In the present specification, the plane surrounded by the annular power receiving coil 31 is also referred to as the coil surface S2 of the power receiving coil 31. In other words, the power receiving coil 31 is wound in the in-plane direction of the coil surface S2 so as to form the coil surface S2. In the power receiving coil 31, an electromotive force due to electromagnetic induction is generated by changing the alternating magnetic field penetrating the coil surface S2 generated by the power transmission coil 21 and the like, and a current flows.

FIG. 7 is a schematic view schematically showing the coil surface S2 of the power receiving coil 31 included in the power receiving device 3 according to the first embodiment of the present invention and its inclination using a longitudinal cross section of the parking / stopping space 4. It is shown. As shown in FIG. 7, the power receiving device 3 has a coil surface S2 of the power receiving coil 31 in a radial cross section of the wheel 6 in a state where at least a part of the power receiving coil 31 is housed in the wheel 6 of the moving body 5. The perpendicular line V is configured to have an inclination with respect to the perpendicular line of the ground contact surface of the wheel 6. In other words, the coil surface S2 of the power receiving coil 31 faces the ground plane of the wheel 6 in the radial cross section of the wheel 6 in a state where at least a part of the power receiving coil 31 is housed in the wheel 6 of the moving body 5. It is tilted. More specifically, the power receiving coil 31 has a perpendicular line V of the coil surface S2 of the power receiving coil 31 in the radial cross section of the wheel 6 in a state where at least a part of the power receiving coil 31 is housed in the wheel 6 of the moving body 5. Is fixed to the housing of the power receiving device 3 via the support member 311 so as to have an inclination θ2 with respect to the perpendicular line of the ground contact surface of the wheel 6. As a result, while the moving body 5 is parked or stopped in the parking / stopping space 4, the coil surface S2 of the power receiving coil 31 faces the coil surface S1 of the power transmission coil 21, so that the electromagnetic induction method is performed from the power transmission coil 21 to the power receiving coil 31. Wireless power supply is performed by. The inclination θ2 may be set to an arbitrary angle according to the installation position of the power transmission coil 21 and the power reception coil 31, the amount of power to be received, and the like. At least a part of the housing of the support member 311 and the power receiving device 3 may be formed of the above-mentioned non-magnetic material. As a result, the magnetic field generated by the power transmission coil 21 is less likely to be attenuated when passing through the housing of the support member 311 and the power receiving device 3.

Here, in the present specification, for example, "opposing" the surface A (at least a part of the surface A) with the surface B means within a region extending in the vertical direction of the surface B (in other words, in other words, in the range in which the surface B extends. , In a columnar region having surface B as a cross section), it means that (at least a part of) surface A overlaps.

With reference to FIG. 6 again, the power conversion unit 32 is connected to the power receiving coil 31. The power conversion unit 32 includes, for example, an AC / DC converter, an inverter, and the like. The power conversion unit 32 transmits the electric power generated in the power receiving coil 31 to the in-vehicle device 51 mounted on the mobile body 5.

The in-vehicle device 51 is, for example, a motor. In such a case, the in-vehicle device 51, which is a motor, consumes the electric power transmitted from the power receiving device 3 to drive the wheels 6. More specifically, in the present embodiment, the in-vehicle device 51 is an in-wheel motor mounted on the wheel 6. However, the in-vehicle device 51 may be an on-board motor mounted on the main body of the moving body 5 and driving the wheels 6 by rotating the shaft 52 of the moving body 5.

The in-vehicle device 51 is not limited to the motor, and may include any electronic device installed in the mobile body 5, such as a storage battery, a communication device, a car navigation system, a media player, and an in-vehicle sensor.

The power storage unit 33 is connected to the power conversion unit 32. The power storage unit 33 includes, for example, a chargeable / dischargeable battery such as a lead storage battery, a nickel hydrogen storage battery, a lithium ion battery, and a sodium-sulfur battery. The power storage unit 33 is not limited to the storage battery, and may include a capacitor. When the power storage unit 33 includes a capacitor, it can be charged and discharged in a shorter time than that of a storage battery or the like, which is advantageous in a situation where high responsiveness is required. The power storage unit 33 stores the power transmitted from the power receiving coil 31 via the power conversion unit 32, or transmits the power to the in-vehicle device 51.

The detection unit 34 includes sensors such as a voltage sensor and a current sensor. The detection unit 34 detects the electric power received by the power receiving coil 31 wirelessly.

The communication unit 35 includes one or more communication modules. The communication module is, for example, a wired LAN communication module, a wireless LAN communication module, a CAN communication module, or the like. The communication unit 35 communicates with an external computer including the power transmission device 2 or an in-vehicle device 51 of the mobile body 5 via a network such as the Internet.

The storage unit 36 is, for example, a semiconductor memory, a magnetic memory, an optical memory, or the like. The storage unit 36 functions as, for example, a main storage device, an auxiliary storage device, or a cache memory. The storage unit 36 stores arbitrary information used for the operation of the power receiving device 3. For example, the storage unit 36 stores a system program, an application program, embedded software, and the like.

The control unit 37 includes one or more processors. The processor may be, for example, a general-purpose processor such as a CPU, a dedicated processor specialized for a specific process, or the like. The control unit 37 is not limited to the processor, and may include one or more dedicated circuits. The dedicated circuit may be, for example, FPGA or ASIC. The control unit 37 controls the power receiving coil 31, the power conversion unit 32, the power storage unit 33, the detection unit 34, the communication unit 35, and the storage unit 36 described above to realize the function of the power receiving device 3.

The control unit 37 can measure the power received by the power receiving device 3 wirelessly. Specifically, the control unit 37 measures the intensity of the electric power received by the power receiving coil 31 wirelessly based on the information detected by the detection unit 34. The strength of electric power may be represented by arbitrary numerical information such as electric power, electric energy, voltage, current, magnetic flux, or magnetic flux density.

The control unit 37 can transmit the electric power received wirelessly by the power receiving device 3 to the in-vehicle device 51 mounted on the mobile body 5. Specifically, the control unit 37 can transmit the electric power generated in the power receiving coil 31 from the power receiving coil 31 to the in-vehicle device 51. Alternatively, the control unit 37 may store the electric power generated in the power receiving coil 31 in the power storage unit 33 and then transmit the power from the power storage unit 33 to the in-vehicle device 51.

(Second Embodiment of Wireless Power Supply System)
Hereinafter, the wireless power supply system 1B, which is the second embodiment of the wireless power supply system 1 according to the present invention, will be described with reference to FIGS. 8 and 9. FIG. 8 is a schematic view schematically showing the wireless power supply system 1B according to the second embodiment of the present invention using a cross section in the width direction of the parking / stopping space. FIG. 9 is a perspective view schematically showing the wireless power supply system 1B according to the second embodiment shown in FIG.

In the second embodiment, the configuration of the wheel chock block 7B and the installation position of the power transmission device 2 are different from those in the first embodiment. The second embodiment will be described below, focusing on the differences from the first embodiment. The same reference numerals are given to the parts having the same configuration as that of the first embodiment.

As shown in FIG. 8, in the wireless power supply system 1B, the wheel chock block 7B includes a side wall portion 73 in addition to the wheel chock portion 71 and the buried portion 72. The side wall portion 73 projects upward in the direction perpendicular to the surface of the parking / stopping space 4 in a state where the wheel chock block 7B is installed in the parking / stopping space 4. As shown in FIG. 9, the side wall portion 73 is formed from one end of the wheel chock portion 71 so that the wheel chock block 7B is L-shaped when viewed from above in the direction perpendicular to the surface of the parking / stopping space 4. It extends in the longitudinal direction of the parking / stopping space 4. As a result, the side wall portion 73 is moved outward in the width direction of the wheel 6 in a state where the moving body 5 is parked or stopped in the parking / stopping space 4 so that the wheel 6 of the moving body 5 comes into contact with the wheel chock 71. Can be located. As shown in FIG. 8, the heights of the wheel chock portion 71 and the side wall portion 73 in the vertical direction with respect to the surface of the parking / stopping space 4 may be different from each other. In the wheel chock block 7B of the present embodiment, the buried portion 72 is provided on the lower side in the vertical direction of both the wheel chock portion 71 and the side wall portion 73, but the embedded portion 72 may not be provided.

In the wireless power supply system 1B, at least a part of the power transmission coil 21 is housed in the side wall portion 73. Further, in the power transmission device 2, in a state where at least a part of the power transmission coil 21 is housed in the side wall portion 73, the coil surface S1 of the power transmission coil 21 is the surface of the parking / stop space 4 in the width direction cross section of the parking / stopping space 4. It is configured to be approximately vertical.

In the present specification, for example, when the surface A is "substantially perpendicular" to the surface B, it is preferable that the surface A is perpendicular to the surface B. However, it does not have to be completely vertical, and the surface A may be inclined by about ± 5 degrees with respect to the vertical direction of the surface B.

In the wireless power supply system 1B, in the power receiving device 3, in a state where at least a part of the power receiving coil 31 is housed in the wheels 6 of the moving body 5, the coil surface S2 of the power receiving coil 31 is formed in the widthwise cross section of the moving body 5. It is configured to be substantially perpendicular to the ground contact surface of the wheel 6.

As a result, in the wireless power supply system 1B, the coil surface S2 of the power receiving coil 31 is in a state where the moving body 5 is parked or stopped in the parking / stopping space 4 so that the wheels 6 of the moving body 5 are in contact with the wheel chock 71. By facing the coil surface S1 of the transmission coil 21, wireless power is supplied from the transmission coil 21 to the power receiving coil 31 by an electromagnetic induction method.

However, the coil surface S1 of the power transmission coil 21 of the power transmission device 2 and the coil surface S2 of the power reception coil 31 of the power reception device 3 are inclined with respect to the surface of the parking / stopping space 4 and the ground plane of the wheel 6 so as to face each other. May be arranged.

The wireless power supply system 1B of the present embodiment includes the power transmission coil 21 housed in the side wall portion 73, but may also include the power transmission coil 21 housed in the wheel chock portion 71.

(Third Embodiment of wireless power supply system)
Hereinafter, the wireless power supply system 1C, which is the third embodiment of the wireless power supply system 1 according to the present invention, will be described with reference to FIGS. 10 and 11. FIG. 10 is a schematic view schematically showing the wireless power supply system 1C according to the third embodiment of the present invention using a cross section in the width direction of the parking / stopping space. FIG. 11 is a perspective view schematically showing the wireless power supply system 1C according to the third embodiment shown in FIG.

In the third embodiment, the configuration of the wheel chock block 7C and the installation position of the power transmission device 2 are different from those in the first embodiment. Hereinafter, the third embodiment will be described with a focus on the differences from the first embodiment. The same reference numerals are given to the parts having the same configuration as that of the first embodiment.

As shown in FIG. 10, in the wireless power supply system 1C, the wheel chock block 7C includes a wheel chock portion 71 and a buried portion 72. The wheel chock block 7C has an L-shape in the longitudinal cross section of the parking / stopping space 4. The buried portion 72 extends from the position below the wheel chock portion 71 in the vertical direction in the longitudinal cross section of the parking / stopping space 4 in the longitudinal direction of the parking / stopping space 4 toward the inside of the parking / stopping space 4. ing. As a result, the buried portion 72 refers to the ground contact surface of the wheel 6 in a state where the moving body 5 is parked or stopped in the parking / stopping space 4 so that the wheel 6 of the moving body 5 comes into contact with the wheel chock 71. It can be located on the lower side in the vertical direction.

In the wireless power supply system 1C, at least a part of the power transmission coil 21 is housed in the buried portion 72. Further, in the power transmission device 2, in a state where at least a part of the power transmission coil 21 is housed in the buried portion 72, the coil surface S1 of the power transmission coil 21 is the surface of the parking space 4 in the width direction cross section of the parking / stopping space 4. It is configured to be substantially parallel.

In the present specification, for example, when the surface A is "substantially parallel" to the surface B, it is preferable that the surface A is parallel to the surface B. However, it does not have to be completely parallel, and the surface A may be inclined by about ± 5 degrees with respect to the surface B.

In the wireless power supply system 1C, in the power receiving device 3, the coil surface S2 of the power receiving coil 31 is a wheel in the widthwise cross section of the moving body 5 in a state where at least a part of the power receiving coil 31 is housed in the wheel 6 of the moving body 5. It is configured to be substantially parallel to the ground plane of No. 6.

As a result, in the wireless power supply system 1C, the coil surface S2 of the power receiving coil 31 is in a state where the moving body 5 is parked or stopped in the parking / stopping space 4 so that the wheels 6 of the moving body 5 are in contact with the wheel chock 71. By facing the coil surface S1 of the transmission coil 21, wireless power is supplied from the transmission coil 21 to the power receiving coil 31 by an electromagnetic induction method.

The wireless power supply system 1C of the present embodiment includes the power transmission coil 21 housed in the buried portion 72, but may also include the power transmission coil 21 housed in the wheel chock 71. Further, the wireless power feeding system 1C may include a side wall portion 73 (see FIGS. 8 and 9) shown in the second embodiment described above, and may include a power transmission coil 21 housed in the side wall portion 73.

The directions of the coil surface S1 of the power transmission coil 21 of the power transmission device 2 and the coil surface S2 of the power reception coil 31 of the power reception device 3 shown in the above-mentioned wireless power supply systems 1A, 1B and 1C are merely examples. , Not limited to this. In the wireless power supply system 1, the directions of the coil surface S1 of the power transmission coil 21 of the power transmission device 2 and the coil surface S2 of the power reception coil 31 of the power reception device 3 may be changed according to the intended use.

As described above, the wireless power supply system 1 according to a plurality of embodiments of the present invention includes a wheel chock block 7, a power transmission device 2, and a power reception device 3. The wheel chock block 7 is a wheel chock block 7 installed in a space 4 where the moving body 5 can be parked or stopped, and is a wheel chock portion 71 that comes into contact with the wheels 6 of the moving body 5 to prevent the moving body 5 from moving. To be equipped. The power transmission device 2 includes a power transmission coil 21 that wirelessly transmits electric power, and at least a part of the power transmission coil 21 is housed in a wheel chock block 7. The power receiving device 3 includes a power receiving coil 31 that wirelessly receives electric power, and is installed in the mobile body 5. According to the wireless power supply system 1 having such a configuration, the power transmission coil 21 is housed in the wheel chock block 7 in which the moving body 5 comes into contact with the wheels 6 of the moving body 5 while the moving body 5 is parked or stopped. It is possible to reduce the possibility that an obstacle will enter the space between the power receiving coil 31 and the power receiving coil 31. Therefore, the wireless power supply system 1 can improve the power supply efficiency in wireless power supply. Therefore, according to the wireless power supply system 1 according to the first embodiment of the present invention, the usefulness of the wireless power supply technology that wirelessly supplies electric power to the mobile body 5 is improved.

In the wireless power feeding system 1A according to the first embodiment of the present invention, it is preferable that at least a part of the power transmission coil 21 is housed in the wheel chock 71. According to such a configuration, the wireless power supply system 1A can transmit electric power from the wheel chock 71 to the power receiving device 3 of the moving body 5 that parks or stops by bringing the wheel 6 into contact with the wheel chock 71. The risk of obstacles entering the space between the power transmission coil 21 and the power reception coil 31 during power supply can be further reduced.

In the wireless power supply system 1B according to the second embodiment of the present invention, the wheel chock block 7B is a side wall located on the outer side in the width direction of the wheel 6 in a state where the wheel 6 of the moving body 5 is in contact with the wheel chock portion 71. It is preferable that a portion 73 is further provided, and at least a part of the power transmission coil 21 is housed in the side wall portion 73. According to such a configuration, the wireless power supply system 1B transmits electric power from the outside in the width direction of the moving body 5 to the power receiving device 3 of the moving body 5 which is parked or stopped by bringing the wheels 6 into contact with the wheel chock 71. This makes it possible to reduce the risk that the wheels 6 will travel or stop above the power transmission device 2 and the power transmission device 2 will be damaged by the load from the wheels 6.

In the wireless power supply system 1C according to the third embodiment of the present invention, the wheel chock block 7C has a space so as to be located under the wheel 6 in a state where the wheel 6 of the moving body 5 is in contact with the wheel chock portion 71. It is preferable that the buried portion 72 to be buried in 4 is further provided, and at least a part of the power transmission coil 21 is housed in the buried portion 72. According to such a configuration, the wireless power supply system 1C can transmit electric power from the lower side of the wheel 6 to the power receiving device 3 of the moving body 5 that parks or stops by bringing the wheel 6 into contact with the wheel chock 71. This makes it possible to further reduce the risk of obstacles entering the space between the power transmission coil 21 and the power reception coil 31 during power supply.

In the wireless power supply system 1 according to a plurality of embodiments of the present invention, the power transmission device 2 may wirelessly transmit electric power when it is determined that the power receiving device 3 exists at a position where electric power can be received from the power transmitting device 2. preferable. According to such a configuration, the wireless power supply system 1 can reduce the power consumption of the power transmission device 2 due to the power transmission device 2 transmitting power wirelessly when the power reception device 3 is not present at a position where the power reception device 3 can receive power. it can.

In the wireless power feeding system 1 according to a plurality of embodiments of the present invention, it is preferable that at least a part of the power receiving coil 31 is housed in the wheels 6 of the moving body 5. According to such a configuration, the wireless power feeding system 1 can bring the power receiving coil 31 close to the power transmitting coil 21 housed in the wheel chock block 7, and an obstacle enters the space between the power transmitting coil 21 and the power receiving coil 31. The risk can be further reduced.

In the wireless power supply system 1 according to a plurality of embodiments of the present invention, the wheel 6 is preferably a tire / wheel assembly composed of a tire 61 and a wheel 62. According to such a configuration, in the wireless power feeding system 1, the internal space of the wheel 6 is partitioned from the outside of the wheel 6 by the tire 61 and the wheel 62, so that the space between the power transmitting coil 21 and the power receiving coil 31 is an obstacle. It is possible to reduce the risk of entry.

The power transmission device 2 according to a plurality of embodiments of the present invention includes a power transmission coil 21 that wirelessly transmits power, and at least a part of the power transmission coil 21 is installed in a space 4 in which the moving body 5 can be parked or stopped. The wheel chock block 7 is housed in a wheel chock block 7 including a wheel chock portion 71 that comes into contact with the wheels 6 of the moving body 5 to prevent the moving body 5 from moving. According to such a configuration, the power transmission device 2 can wirelessly transmit electric power while the mobile body 5 including the power receiving device 3 is parked or stopped. Further, according to the power transmission device 2, since the power transmission coil 21 is housed in the wheel chock block 7 in contact with the wheel 6 of the moving body 5, an obstacle is created in the space between the power transmission coil 21 and the power reception coil 31. The risk of entry can be reduced, and the power supply efficiency in wireless power transmission can be improved. Therefore, according to the power transmission device 2 according to the plurality of embodiments of the present invention, the usefulness of the wireless power feeding technique for wirelessly supplying electric power to the mobile body 5 is improved.

The wheel chock block 7 according to a plurality of embodiments of the present invention is a wheel chock block 7 installed in a space 4 where the moving body 5 can be parked or stopped, and is in contact with the wheel 6 of the moving body 5 and is a moving body. It includes a wheel chock 71 that hinders the movement of the wheel chock 5, and a power transmission device 2 that includes a power transmission coil 21 that wirelessly transmits power, and at least a part of the power transmission coil 21 is housed in the wheel chock block 7. According to such a configuration, the wheel chock block 7 can wirelessly transmit electric power while the mobile body 5 including the power receiving device 3 is parked or stopped. Further, according to the wheel chock block 7, since the power transmission coil 21 is housed in the wheel chock block 7 in contact with the wheel 6 of the moving body 5, there is an obstacle in the space between the power transmission coil 21 and the power reception coil 31. It is possible to reduce the possibility of the wheel entering, and it is possible to improve the power feeding efficiency in wireless power feeding. Therefore, according to the wheel chock block 7 according to the plurality of embodiments of the present invention, the usefulness of the wireless power feeding technique for wirelessly supplying electric power to the mobile body 5 is improved.

Although the present invention has been described based on the drawings and embodiments, it should be noted that those skilled in the art can easily make various modifications and modifications based on the present invention. Therefore, it should be noted that these modifications and modifications are within the scope of the present invention. For example, the configurations or functions included in each embodiment or each embodiment can be rearranged so as not to be logically inconsistent. Further, the configurations or functions included in each embodiment can be used in combination with other embodiments or other examples, and a plurality of configurations or functions can be combined into one, divided into one, or one. It is possible to omit the part.

For example, in the above-described embodiment, all or part of the functions or processes described as the functions or processes of the control unit 27 of the power transmission device 2 or the control unit 37 of the power receiving device 3 is a general-purpose function or process such as a smartphone or a personal computer. It may be realized as a function or process of a computer. Specifically, a program describing processing contents for realizing each function of the control unit 27 of the power transmission device 2 or the control unit 37 of the power receiving device 3 according to the present embodiment is stored in the memory of the computer and is stored by the processor of the computer. The program can be read and executed. Therefore, the invention according to the present embodiment can also be realized as a program that can be executed by the processor. For example, the control device (ECU: Electronic Control Unit) of the mobile body 5 may be configured to function as the control unit 37 of the power receiving device 3.

Further, in the above-described embodiment, the power transmission device 2 and the power receiving device 3 are configured so that the control unit 37 of the power receiving device 3 executes a part or all of the operations and processes executed by the control unit 27 of the power transmitting device 2. You may. For example, when the moving body 5 parks or stops in the parking / stopping space 4 in which the power transmission device 2 is installed, the control unit 37 of the power receiving device 3 controls the power transmission device 2 to transmit electric power wirelessly to the power transmission device 2. You may let me do it.

Further, for example, in the above-described embodiment, the tire 61 has been described as being filled with air, but the present invention is not limited to this. For example, the tire 61 can be filled with a gas such as nitrogen. Further, for example, the tire 61 can be filled with an arbitrary fluid including a liquid, a gel-like substance, a powder or granular material, or the like, in place of or in addition to the gas.

1 (1A, 1B, 1C): Wireless power supply system, 2: Power transmission device, 21: Power transmission coil, 211: Support member, 22: Power conversion unit, 23: Power storage unit, 24: Detection unit, 25: Communication unit, 26 : Storage unit, 27: Control unit, 3: Power receiving device, 31: Power receiving coil, 311: Support member, 32: Power conversion unit, 33: Power storage unit, 34: Detection unit, 35: Communication unit, 36: Storage unit, 37: Control unit, 4: Parking space, 5: Moving object, 51: In-vehicle device, 52: Shaft, 6: Wheel, 61: Tire, 611: Bead part, 612: Sidewall part, 613: Tread part, 62 : Wheel, 621: Rim part, 622: Hub part, 623: Disc part, 7 (7A, 7B, 7C): Wheel chock block, 71: Wheel chock part, 72: Buried part, 73: Side wall part, P: Power supply , S1, S2: Coil surface, θ1, θ2: Tilt, V: Vertical direction

Claims (9)

A wheel chock block that is installed in a space where a moving body can be parked or stopped, and includes a wheel chock portion that contacts the wheels of the moving body and hinders the movement of the moving body.
A power transmission device comprising a power transmission coil that transmits electric power wirelessly, and at least a part of the power transmission coil is housed in the wheel chock block.
A power receiving device equipped with a power receiving coil that receives power wirelessly and installed in the mobile body, and a power receiving device.
Including wireless power supply system. The wireless power feeding system according to claim 1, wherein at least a part of the power transmission coil is housed in the wheel chock. The wheel chock block further includes a side wall portion located on the outer side in the width direction of the wheel in a state where the wheel of the moving body is in contact with the wheel chock portion.
The wireless power feeding system according to claim 1 or 2, wherein at least a part of the power transmission coil is housed in the side wall portion. The wheel chock block further includes a buried portion that is embedded in the space so as to be located below the wheel in a state where the wheel of the moving body is in contact with the wheel chock portion.
The wireless power supply system according to any one of claims 1 to 3, wherein at least a part of the power transmission coil is housed in the embedded portion. The radio according to any one of claims 1 to 4, wherein the power transmission device transmits power by radio when it is determined that the power receiving device exists at a position capable of receiving the power from the power transmission device. Power supply system. The wireless power feeding system according to any one of claims 1 to 5, wherein at least a part of the power receiving coil is housed in the wheel of the moving body. The wireless power supply system according to any one of claims 1 to 6, wherein the wheel is a tire / wheel assembly composed of a tire and a wheel. Equipped with a power transmission coil that transmits power wirelessly
At least a part of the power transmission coil is a wheel chock block installed in a space where the moving body can be parked or stopped, and includes a wheel chock portion that contacts the wheels of the moving body and prevents the moving body from moving. , A power transmission device housed in a wheel chock block. A wheel chock block installed in a space where a moving body can be parked or stopped.
A wheel chock that comes into contact with the wheels of the moving body and hinders the movement of the moving body.
A power transmission device comprising a power transmission coil that transmits electric power wirelessly, and at least a part of the power transmission coil is housed in the wheel chock block.
A wheel chock block.

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