WO2016147295A1

WO2016147295A1 - Wireless power supply system and moving body

Info

Publication number: WO2016147295A1
Application number: PCT/JP2015/057668
Authority: WO
Inventors: 阿久澤　好幸; 有基伊藤; 裕志松盛
Original assignee: 三菱電機エンジニアリング株式会社
Priority date: 2015-03-16
Filing date: 2015-03-16
Publication date: 2016-09-22
Also published as: JPWO2016147295A1; JP6309162B2

Abstract

A wireless power supply system comprising: a transmission device (1) that wirelessly transmits power; and an electric bicycle (3) having a reception device (2) that receives power wirelessly transmitted by the transmission device (1) and charges, said electric bicycle (3) power-assisting by using the charged power. The reception device (2) has: a relay antenna (205) provided in a wheel of the electric bicycle (3) and receiving power wirelessly transmitted by the transmission device (1); a reception antenna (206) provided in a non-rotating section of the electric bicycle (3) and receiving, in a non-contact manner, power received by the relay antenna (205); and a battery (203) that charges the power received by the reception antenna (206).

Description

Wireless power supply system and moving body

The present invention includes a transmitting device that wirelessly transmits power, a receiving device that receives and charges the power wirelessly transmitted by the transmitting device, and a mobile that performs electric assist using the charged power. The present invention relates to a wireless power feeding system and a moving body.

2. Description of the Related Art Conventionally, a bicycle parking lot that can charge a battery when an electric bicycle is stopped on a bicycle parking platform is known (see, for example, Patent Document 1). In the conventional configuration disclosed in Patent Document 1, a charging stand is provided on the bicycle parking stand, and after the user stops the electric bicycle on the bicycle parking stand, the user removes the battery from the electric bicycle and attaches it to the charging stand. The battery is charged during parking. Then, when leaving the vehicle, the charged battery is attached to the electric bicycle. As a result, comfortable electric assist traveling is possible.

JP 2011-89251 A

However, in the conventional configuration, it is necessary to remove the battery from the electric bicycle and attach the battery to the charging stand to perform charging.
Further, when the bicycle parking lot is outdoors, there is a risk of electric shock due to rain, and the charging stand is contaminated with sand and dust, so regular maintenance is required. Therefore, the bicycle parking lot is provided indoors where rain and wind do not enter, and there is a problem that the facilities are enlarged and the cost is increased.

The present invention has been made in order to solve the above-described problems, and has a smaller and less expensive configuration than the conventional configuration, and does not require time and effort, and easily feeds power to a mobile receiver. It is an object of the present invention to provide a wireless power feeding system and a moving body that can perform the above.

A wireless power feeding system according to the present invention includes a transmission device that wirelessly transmits power and a reception device that receives and charges the power transmitted wirelessly by the transmission device, and uses the charged power to electrically assist The receiving device is provided on a wheel of the moving body and receives the power transmitted wirelessly by the transmitting device and the non-rotating portion of the moving body and is received by the relay antenna. A receiving antenna that receives the received power in a contactless manner and a battery that charges the power received by the receiving antenna.

According to the present invention, since it is configured as described above, power can be easily supplied to a battery of a mobile body having an electric assist function with a smaller and less expensive configuration than that of the conventional configuration.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram which shows the structural example of the wireless electric power feeding system which concerns on Embodiment 1 of this invention, (a) It is a figure which shows the state before parking of an electric bicycle, (b) The state at the time of parking of an electric bicycle FIG. It is a block diagram which shows the structural example of the wireless electric power feeding system which concerns on Embodiment 1 of this invention. It is a schematic diagram explaining the electric power transmission of the wireless power feeding system which concerns on Embodiment 1 of this invention, and is the partial cross section figure which looked at the front-wheel part of the electric bicycle from the upper part. It is a schematic diagram which shows another structural example of the electric bicycle which concerns on Embodiment 1 of this invention. It is a schematic diagram which shows another structural example of the electric bicycle which concerns on Embodiment 1 of this invention. It is a schematic diagram which shows another structural example of the wireless electric power feeding system which concerns on Embodiment 1 of this invention, (a) It is a figure which shows the state before parking of an electric bicycle, (b) At the time of parking of an electric bicycle It is a figure which shows the state of. It is a schematic diagram which shows the structural example of the electric bicycle which concerns on Embodiment 2 of this invention. It is a schematic diagram which shows another structural example of the wireless power feeding system which concerns on Embodiment 2 of this invention, (a) It is a figure which shows the state before parking of an electric bicycle, (b) At the time of parking of an electric bicycle It is a figure which shows the state of. It is a schematic diagram which shows another structural example of the receiving antenna in Embodiment 2 of this invention, and is a figure which shows the flame | frame of an electric bicycle. It is a block diagram which shows the structural example of the wireless electric power feeding system which concerns on Embodiment 3 of this invention. It is a block diagram which shows the structural example of the wireless electric power feeding system which concerns on Embodiment 4 of this invention. It is a block diagram which shows the structural example of the wireless electric power feeding system which concerns on Embodiment 5 of this invention. It is a schematic diagram which shows the structural example of the wireless power feeding system which concerns on Embodiment 6 of this invention, (a) It is a figure which shows the state before parking of an electric wheelchair, (b) Shows the state at the time of parking of an electric wheelchair. FIG. It is a schematic diagram which shows another structural example of the wireless electric power feeding system which concerns on Embodiment 6 of this invention. It is a schematic diagram which shows another structural example of the wireless electric power feeding system which concerns on Embodiment 6 of this invention. It is a schematic diagram which shows the structural example of the wireless electric power feeding system which concerns on Embodiment 7 of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is a schematic diagram showing a configuration example of a wireless power feeding system according to Embodiment 1 of the present invention, and FIG. 2 is a block diagram.
As illustrated in FIGS. 1 and 2, the wireless power feeding system includes a transmission device 1, a reception device 2, and a moving body having an electric assist function. FIG. 1 shows a case where an electric bicycle 3 is used as a moving body having an electric assist function.

The transmission device 1 wirelessly transmits power to the reception device 2 of the electric bicycle 3. In the example of FIG. 1, the transmission device 1 is installed on a charging stand 4 provided in a bicycle parking lot where the electric bicycle 3 is parked. As illustrated in FIGS. 1 and 2, the transmission device 1 includes a primary power source 101, a transmission power source 102, and a transmission antenna 103. In FIG. 1, the primary power supply 101 and the transmission power supply 102 are not shown.

The primary power supply 101 outputs DC or AC power.
The transmission power source 102 converts DC power or AC power (input power) from the primary power source 101 into power (high frequency power) that matches the resonance frequency of the transmission antenna 103 and outputs the power.

The transmission antenna 103 transmits the power supplied from the primary power source 101 via the transmission power source 102 to the antenna unit 201 of the receiving device 2. In the example of FIG. 1, the transmitting antenna 103 is disposed at a position where the receiving device 2 faces when the electric bicycle 3 is parked. In addition, the transmission antenna 103 is configured to have a size capable of transmitting power over a sufficiently wide range in consideration of parking of electric bicycles 3 of different sizes.

The bicycle parking lot shown in FIG. 1 may be for home use or public use. In the example of FIG. 1, a bicycle parking lot for parking one electric bicycle 3 is shown, but a bicycle parking lot for parking a plurality of electric bicycles 3 may be used. At this time, not only a planar bicycle parking lot but also a three-dimensional bicycle parking lot may be used.

The electric bicycle 3 has a receiving device 2 that receives and charges power transmitted wirelessly by the transmitting device 1, and is a moving body that performs electric assist using the charged power. As illustrated in FIGS. 1 and 2, the receiving device 2 includes an antenna unit 201, a rectifier circuit 202, and a battery 203. In FIG. 1, the rectifier circuit 202 is not shown, and the antenna unit 201 (reception antenna 206) and the battery 203 are connected by the power cable 204.

The antenna unit 201 includes a relay antenna 205 and a reception antenna 206.
The relay antenna 205 is provided on a wheel of the electric bicycle 3 and receives power transmitted wirelessly by the transmission antenna 103 of the transmission device 1. In the example of FIG. 1, a case where the relay antenna 205 is attached to the front wheel of the electric bicycle 3 is shown. The relay antenna 205 is configured to have a size that can sufficiently receive the amount of power required for charging the battery 203 with the transmission antenna 103.

The receiving antenna 206 is provided in a non-rotating part of the electric bicycle 3, and receives the electric power received by the relay antenna 205 by non-contact rotary transmission. Note that non-contact rotary transmission means non-contact power transmission using a rotating body, and means an operation in which the relay antenna 205, which is a rotating body, delivers power from the transmitting antenna 103 to the receiving antenna 206. . In the example of FIG. 1, the receiving antenna 206 is attached to the fork end of the electric bicycle 3.

Note that the power transmission method between the transmitting antenna 103 and the antenna unit 201 is not particularly limited, and any of a magnetic field resonance method, an electric field resonance method, and an electromagnetic induction method may be used.

The rectifier circuit 202 rectifies the power received by the receiving antenna 206. The battery 203 is for charging the power rectified by the rectifier circuit 202.

Next, the operation of the wireless power feeding system configured as described above will be described with reference to FIGS. In the following description, a case where the transmission antenna 103 and the relay antenna 205 face each other and power transmission is always performed will be described as an example.
First, the user of the electric bicycle 3 stops the front wheel of the electric bicycle 3 according to the wheel stopper 5. As a result, the transmission antenna 103 of the transmission device 1 provided in the charging stand 4 and the relay antenna 205 of the reception device 2 provided on the front wheel of the electric bicycle 3 face each other, and power transmission is started. At this time, since the antenna sizes of the transmission antenna 103 and the reception antenna 206 are greatly different, the amount of generated magnetic flux linkage is small and the power transmission efficiency is low. Therefore, power transmission efficiency is improved by transmitting power via the relay antenna 205 having a larger antenna size than the receiving antenna 206. The electric power received by the relay antenna 205 is transmitted to the receiving antenna 206 by non-contact rotary transmission, supplied to the battery 203 via the power cable 204, and charged. At this time, by performing wireless power transmission between the transmission device 1 and the reception device 2, charging can be performed without removing the battery 203.

As described above, according to the first embodiment, the relay antenna 205 that is provided on the wheel of the electric bicycle 3 and receives the power transmitted wirelessly by the transmission device 1 and the non-rotating portion of the electric bicycle 3 are provided. Since the electric bicycle 3 is provided with the receiving device 2 having the receiving antenna 206 that receives the power received by the relay antenna 205 in a contactless manner and the battery 203 that charges the power received by the receiving antenna 206, Compared to the configuration, the battery 203 can be easily fed with a small and inexpensive configuration without much effort.
In other words, since the battery 203 can be charged without being attached or detached simply by stopping the electric bicycle 3 at a predetermined position, it can be efficiently charged without taking time and effort. Further, since there is no need to connect the transmitter 1 and the battery 203 with electrodes, the transmitter 1 can be easily made waterproof and dustproof, there is no risk of electric shock, and regular maintenance is possible. It becomes unnecessary. Moreover, since it is not necessary to make the installation location of the transmitter 1 into a waterproof structure and a dust-proof structure such as a building, the cost of the entire bicycle parking lot can be reduced.

Furthermore, outdoor installation, which has been difficult in the past, is also possible, and the transmission device 1 can be expected to spread over a wide area, increasing the opportunity to supply power. As a result, it is possible to reduce the capacity of the battery 203 because there is no problem even if the charging capacity is small, and the battery 203 mounted on the electric bicycle 3 can be reduced in size, weight, and cost. Become.

FIG. 1 shows the case where the relay antenna 205 separate from the electric bicycle 3 is attached to the front wheels. However, the present invention is not limited to this. For example, as shown in FIG. 4, the relay antenna 205 may be formed of a spoke in which a connection portion with another member (rim, hub, frame, etc.) is insulated by an insulator 208. Good. The shape of the spoke is not limited to a radial shape, and may be an arbitrary shape such as a spiral type.
Further, for example, as shown in FIG. 5, the relay antenna 205 may be constituted by a rim in which a connection portion with another member (spoke, frame, etc.) is insulated by an insulator 208.
4 and 5, the receiving antenna 206 and the power cable 204 are not shown.

1, 4, and 5 show the case where the antenna unit 201 is provided on the front wheel of the electric bicycle 3, it may be provided on the rear wheel of the electric bicycle 3.

FIG. 1 shows the case where the transmitter 1 is provided in the charging stand 4. However, it is not restricted to this, For example, as shown in FIG. Thereby, it is not necessary to provide the charging stand 4 and the cost can be reduced.

Embodiment 2. FIG.
In the first embodiment, the case where the antenna unit 201 is provided on the wheel of the electric bicycle 3 has been described. In contrast, the second embodiment shows a case where the antenna unit 201 is configured using the frame of the electric bicycle 3. FIG. 7 is a schematic diagram showing a configuration of an electric bicycle 3 according to Embodiment 2 of the present invention. The electric bicycle 3 according to Embodiment 2 shown in FIG. 7 is obtained by deleting the power cable 204 from the electric bicycle 3 of the wireless power feeding system according to Embodiment 1 shown in FIG. 1 and changing the configuration of the antenna unit 201. is there. Other configurations are the same, and the same reference numerals are given and description thereof is omitted. The transmission apparatus 1 has the same configuration as that shown in FIG.

The antenna unit 201 has a reception antenna 207 as shown in FIG.
The reception antenna 207 is configured by using a frame of the electric bicycle 3 to insulate a connection portion with another member, and receives power transmitted wirelessly by the transmission device 1. For example, when the frame of the electric bicycle 3 is a conductive member, the reception antenna 207 can be configured by insulating a connection portion with another member from the frame. Examples of the conductive member include steel or carbon fiber. In the example illustrated in FIG. 7, the reception antenna 207 includes a conductive top tube, a down tube, and a seat tube in which a connection portion with another member is insulated by an insulator 208. The electric power received by the receiving antenna 207 is supplied to the battery 203 and charged.

The operation of the wireless power feeding system using the electric bicycle 3 configured as described above is the same as that in the first embodiment, and a description thereof will be omitted.

As described above, according to the second embodiment, it is configured by using the frame of the electric bicycle 3 to insulate the connection portion with other members, and receive the power transmitted wirelessly by the transmission device 1. Even if the receiving apparatus 2 having the antenna 207 and the battery 203 that charges the electric power received by the receiving antenna 207 is provided in the electric bicycle 3, the same effect as in the first embodiment can be obtained.

FIG. 7 shows a case where the receiving antenna 207 is configured using a top tube, a down tube, and a seat tube, and power is transmitted to and from the transmission device 1 provided in the charging stand 4. However, the present invention is not limited to this. For example, the configuration shown in FIG. In FIG. 8, the transmission device 1 is arranged or embedded on the ground or floor. The receiving antenna 206 is configured using a frame at the bottom of the electric bicycle 3, such as a frame for fixing a rear wheel such as a pedal, a seat stay or a chain stay, and a frame below the seat tube. Thereby, it is not necessary to provide the charging stand 4 and the cost can be reduced.

7 and 8 show the case where the frame of the electric bicycle 3 is a conductive member. On the other hand, for example, when the frame of the electric bicycle 3 is an insulating member (insulator 208), for example, as shown in FIG. Can be configured. Examples of the insulating member include glass fiber.

Embodiment 3 FIG.
In the embodiment 1.2, the case where the electric bicycle 3 having the reception device 2 is parked in the bicycle parking lot and opposed to the transmission device 1 is described as an example. On the other hand, Embodiment 3 shows a case where power transmission is controlled by communication between the transmission device 1 and the reception device 2. 10 is a block diagram showing a configuration of a wireless power feeding system according to Embodiment 3 of the present invention. The wireless power feeding system according to the third embodiment shown in FIG. 10 includes a reception-side communication unit 209 added to the receiving device 2 of the wireless power feeding system according to the first embodiment shown in FIG. The unit 104 and the power supply control unit 105 are added. Other configurations are the same, and the same reference numerals are given and description thereof is omitted. The antenna unit 201 may have the configuration of the first embodiment or the configuration of the second embodiment.

The reception-side communication unit 209 performs communication with the transmission device 1 when the antenna unit 201 is located in an area where the power from the transmission device 1 can be received.
The transmission-side communication unit 104 performs communication with the reception-side communication unit 209 of the reception device 2.
The power supply control unit 105 controls the transmission of power to the receiving device 2 in accordance with communication by the transmission side communication unit 104. At this time, for example, when the power transmission control unit 105 communicates with the reception side communication unit 209 of the reception device 2 by the transmission side communication unit 104 and the electric bicycle 3 having the reception device 2 is authenticated, The primary power supply 101 is controlled to start the transmission of power. The power supply control unit 105 is executed by program processing using a CPU based on software.

Embodiment 4 FIG.
In the third embodiment, communication between the transmission device 1 and the reception device 2 is performed, and power transmission is controlled according to the communication. At this time, information such as the deterioration state and the charging state of the battery 203 may be detected on the transmission side and notified to the reception side. FIG. 11 is a block diagram showing a configuration of a wireless power feeding system according to Embodiment 4 of the present invention. In the wireless power feeding system according to the fourth embodiment shown in FIG. 11, the state detection unit 106 is added to the transmission device 1 of the wireless power feeding system according to the third embodiment shown in FIG. 10, and the notification unit 210 is added to the reception device 2. It is added. Other configurations are the same, and the same reference numerals are given and description thereof is omitted. The antenna unit 201 may have the configuration of the first embodiment or the configuration of the second embodiment.

The state detection unit 106 detects information related to charging of the receiving device 2 from the transmission state of power to the receiving device 2. At this time, the state detection unit 106 detects information such as a deterioration state of the battery 203 and a charging state of the battery 203 from the amount of current transmitted to the reception device 2 by the transmission power source 102. Then, the transmission side communication unit 104 notifies the reception side communication unit 209 of the corresponding reception device 2 of information indicating the detection result by the state detection unit 106.
The alerting | reporting part 210 alert | reports the information regarding the charge of the receiver 2 notified to the receiving side communication part 209 to a user by an audio | voice or a display.
Thereby, the user of the electric bicycle 3 can know information regarding charging of the receiving device 2.

Embodiment 5 FIG.
In the embodiment 1.2, the case where the electric bicycle 3 having the reception device 2 is parked in the bicycle parking lot and opposed to the transmission device 1 is described as an example. On the other hand, Embodiment 5 shows a case where power transmission is performed when charged by a user. 12 is a block diagram showing a configuration of a wireless power feeding system according to Embodiment 5 of the present invention. The wireless power feeding system according to the fifth embodiment shown in FIG. 12 is obtained by adding a charging detection unit 107 and a power feeding control unit 108 to the transmitter 1 of the wireless power feeding system according to the first embodiment shown in FIG. Other configurations are the same, and the same reference numerals are given and description thereof is omitted. The antenna unit 201 may have the configuration of the first embodiment or the configuration of the second embodiment.

The billing detection unit 107 detects billing.
The power supply control unit 108 controls the transmission of power to the corresponding receiving device 2 in accordance with the billing detected by the billing detection unit 107. At this time, the power supply control unit 108 controls the primary power supply 101 so as to transmit the amount of power corresponding to the billing. The power supply control unit 108 is executed by program processing using a CPU based on software.

Embodiment 6 FIG.
In the first to fifth embodiments, the case where the electric bicycle 3 is used as the moving body having the electric assist function has been described. However, the present invention is not limited to this, and the present invention is also applicable to the case where the electric wheelchair 6 is used as a moving body having an electric assist function.
FIG. 13 shows a case where the antenna unit 201 is attached to the drive wheel (rear wheel) of the electric wheelchair 6. In FIG. 15, the detailed configuration of the antenna unit 201 is not shown, but is the same as the configuration shown in FIG. In FIG. 15, the illustration of the power cable 204 is omitted.

Further, as shown in FIG. 14, the relay antenna 205 may be constituted by a rim in which a connection portion with another member is insulated by an insulator 208. Further, as shown in FIG. 15, the relay antenna 205 may be configured by a spoke in which a connection portion with another member is insulated by an insulator 208. 14 and 15, illustration of the receiving antenna 206 and the power cable 204 is omitted.

Embodiment 7 FIG.
In the sixth embodiment, the antenna 201 is provided on the drive wheel of the electric wheelchair 6. On the other hand, for example, as shown in FIG. 16, the antenna unit 201 may be configured using a frame of the electric wheelchair 6. The other configuration is the same as that of the electric bicycle 3, and the description thereof is omitted. Moreover, although the case where the antenna part 201 was comprised using the electroconductive left and right flame | frame of the electric wheelchair 6 was shown in the example of FIG. 16, you may use the frame of a bottom face or a back surface. Alternatively, the antenna unit 201 may be configured by incorporating a conductive member in an insulating sheet.

In the present invention, within the scope of the invention, free combinations of the respective embodiments, modifications of arbitrary components of the respective embodiments, or omission of arbitrary components of the respective embodiments are possible. .

The wireless power feeding system according to the present invention has a small and inexpensive configuration compared to the conventional configuration, and can easily feed power to a mobile battery having an electric assist function without any hassle. An apparatus, a receiving apparatus to which power is supplied wirelessly by the transmitting apparatus, and a mobile body that has a battery that charges the power supplied by the receiving apparatus and performs electric assist using the power charged in the battery. It is suitable for use in a wireless power supply system.

1 transmission device, 2 reception device, 3 electric bicycle, 4 charging stand, 5 wheel stopper, 6 electric wheelchair, 101 primary power supply, 102 transmission power supply, 103 transmission antenna, 104 transmission side communication unit, 105 power supply control unit, 106 status detection , 107 charging detection unit, 108 power supply control unit, 201 antenna unit, 202 rectifier circuit, 203 battery, 204 power cable, 205 relay antenna, 206 reception antenna, 207 reception antenna, 208 insulator, 209 reception side communication unit, 210 Notification section.

Claims

A transmission device for transmitting power wirelessly;
It has a receiving device that receives and charges power transmitted wirelessly by the transmitting device, and includes a moving body that performs electric assist using the charged power.
The receiving device is:
A relay antenna that is provided on a wheel of the mobile body and receives power transmitted wirelessly by the transmission device;
A receiving antenna that is provided in a non-rotating portion of the mobile body and receives the power received by the relay antenna in a contactless manner;
A wireless power feeding system, comprising: a battery that charges electric power received by the receiving antenna.
The wireless power feeding system according to claim 1, wherein the relay antenna includes a spoke or a rim in which a connection portion with another member is insulated.
The wireless power feeding system according to claim 1, wherein the transmission device is provided at a wheel stop for stopping the wheel.
The receiving device is:
When the relay antenna is located in a region where the power from the transmission device can be received, a reception-side communication unit that performs communication with the transmission device;
The transmitter is
A transmission side communication unit for communicating with the reception side communication unit;
The wireless power feeding system according to claim 1, further comprising: a power feeding control unit that controls transmission of power to the corresponding receiving device in accordance with communication by the transmitting side communication unit.
The transmitter is
From a transmission state of power to the receiving device, a state detection unit that detects information related to charging of the receiving device,
The transmission side communication unit notifies the reception side communication unit of the corresponding receiving device of information indicating a detection result by the state detection unit,
The receiving device is:
The wireless power feeding system according to claim 4, further comprising: a notification unit that notifies information related to charging of the reception device notified to the reception-side communication unit.
The transmitter is
A billing detector for detecting billing;
The wireless power feeding system according to claim 1, further comprising: a power feeding control unit that controls transmission of power to the corresponding receiving device in accordance with the billing detected by the billing detection unit.
The wireless power feeding system according to claim 1, wherein the transmitting device and the receiving device perform power transmission by magnetic field resonance.
The wireless power feeding system according to claim 1, wherein the transmitting device and the receiving device perform power transmission by electric field resonance.
The wireless power feeding system according to claim 1, wherein the transmitting device and the receiving device perform power transmission by electromagnetic induction.
A transmission device for transmitting power wirelessly;
It has a receiving device that receives and charges power transmitted wirelessly by the transmitting device, and includes a moving body that performs electric assist using the charged power.
The receiving device is:
A receiving antenna configured to insulate a connecting portion with other members using the frame of the moving body, and receive power wirelessly transmitted by the transmitting device;
A wireless power feeding system comprising: a battery that charges power received by the receiving antenna.
The frame is a conductive member,
The wireless power feeding system according to claim 10, wherein the reception antenna is configured by insulating a connection portion with the other member of the frame.
The frame is an insulating member,
The wireless power feeding system according to claim 10, wherein the reception antenna is configured by incorporating a conductive member in the frame.
The transmitter is installed on the ground or floor,
The wireless power feeding system according to claim 10, wherein the receiving antenna is configured using the frame at the bottom of the moving body.
The receiving device is:
When the reception antenna is located in an area where the power from the transmission device can be received, the reception antenna has a reception side communication unit that performs communication with the transmission device,
The transmitter is
A transmission side communication unit for communicating with the reception side communication unit;
The wireless power feeding system according to claim 10, further comprising: a power feeding control unit that controls transmission of power to the corresponding receiving device in accordance with communication by the transmitting side communication unit.
The transmitter is
From a transmission state of power to the receiving device, a state detection unit that detects information related to charging of the receiving device,
The transmission side communication unit notifies the reception side communication unit of the corresponding receiving device of information indicating a detection result by the state detection unit,
The receiving device is:
The wireless power feeding system according to claim 14, further comprising a notifying unit that notifies information related to charging of the receiving device notified to the receiving-side communication unit.
The transmitter is
A billing detector for detecting billing;
The wireless power feeding system according to claim 10, further comprising: a power feeding control unit that controls transmission of power to the corresponding receiving device according to the billing detected by the billing detection unit.
The wireless power feeding system according to claim 10, wherein the transmitting device and the receiving device perform power transmission by magnetic field resonance.
The wireless power feeding system according to claim 10, wherein the transmitting device and the receiving device perform power transmission by electric field resonance.
The wireless power feeding system according to claim 10, wherein the transmitting device and the receiving device perform power transmission by electromagnetic induction.
A mobile device that has a receiving device that receives and charges power transmitted wirelessly by a transmitting device, and that performs electric assist using the charged power,
The receiving device is:
A relay antenna that is provided on a wheel of the mobile body and receives power transmitted wirelessly by the transmission device;
A receiving antenna that is provided in a non-rotating portion of the mobile body and receives the power received by the relay antenna in a contactless manner;
And a battery that charges the electric power received by the receiving antenna.
A mobile device that has a receiving device that receives and charges power transmitted wirelessly by a transmitting device, and that performs electric assist using the charged power,
The receiving device is:
A receiving antenna configured by insulating a connecting portion with other members using the frame of the moving body;
And a battery that charges the power received by the receiving antenna.