WO2010070914A1

WO2010070914A1 - Power supply system, and movable body and fixed body for same

Info

Publication number: WO2010070914A1
Application number: PCT/JP2009/006972
Authority: WO
Inventors: 原川健一; 忍裕司
Original assignee: 株式会社竹中工務店
Priority date: 2008-12-19
Filing date: 2009-12-17
Publication date: 2010-06-24
Also published as: JP2010148287A

Abstract

Provided is a power supply system which is capable of supplying electric power with high efficiency using a simple configuration. The power supply system supplies electric power to a prescribed load (24) from a fixed body (10) via a movable body (20). The fixed body (10) is equipped with multiple first power transmission electrodes (12) and multiple second power transmission electrodes (13) to which alternating-current power is supplied, and an alternating-current power source (11) that supplies the electric power to the multiple first power transmission electrodes (12) and the multiple second power transmission electrodes (13). The movable body (20) is equipped with multiple power reception electrodes (21) which are disposed facing the first power transmission electrodes (12) or the second power transmission electrodes (13) with no contact, whereby are formed capacitors (5).

Description

Power supply system, and movable body and fixed body therefor

The present invention relates to a power supply system for supplying power to various loads, and a movable body and a fixed body therefor.
This application is based on Japanese Patent Application No. 2008-324520 filed in Japan on December 19, 2008 and incorporates the contents thereof.

In general, a power supply system that supplies power to various loads arranged on the floor surface is a contact type that supplies power by bringing an electrode that is exposed on the floor surface into contact with an electrode provided on the bottom surface of the load. The power supply system can be broadly divided into a non-contact type power supply system that supplies power without contacting an electrode provided in a non-exposed state inside the floor with a load electrode.

Among these, a conventional non-contact type power supply system is disclosed in Patent Document 1, for example. This system supplies power to a load (a ground movable body) that moves along a traveling path. An induction wire is disposed along the traveling path, and an iron core in which a coil is wound around the ground movable body. Is provided. Then, a high-frequency current is passed through the induction wire, and electromagnetic induction is performed with the induction wire as the primary side and the coil as the secondary side, thereby supplying power to the ground movable body.

However, in such a conventional non-contact power supply system, in order to increase the power transmission efficiency, the induction wire and the coil are brought close to each other, or the magnetic flux generated by energizing the induction wire is applied to the central axis of the coil. There were many restrictions on the position, such as the need to align the guide wire and the coil so that they could pass through. Accordingly, there is a problem that power can be supplied only through a fixed route such as a traveling path, and power cannot be supplied to a movable body such as a robot that needs to move freely on the floor surface. . In addition, it is necessary to use a magnetic material such as an iron core to form a magnetic path, which increases the weight and causes noise due to magnetostriction when the magnetic material is subjected to AC excitation. In addition, as a non-contact power supply system, it is conceivable to supply power using electromagnetic waves, but there are strict regulations from the viewpoint of avoiding adverse effects on the human body and malfunctions of electronic devices, and people like office spaces It was difficult to install in the place where there is.

In view of such a point, the inventors of the present application have proposed a power supply system that can perform non-contact power feeding using series resonance instead of electromagnetic induction or electromagnetic waves (see Patent Document 2, however, this application). At the time of filing, the patent document 2 is not disclosed and the power supply system is not known). Hereinafter, an outline of the power supply system will be described.

FIG. 32 is a longitudinal sectional view of an essential part of such a conventional power supply system. This power supply system is a power supply system for supplying power to a load 104 from a fixed body 101 arranged in a power supply area 100 via a movable body 103 arranged in a power supplied area 102. is there. The fixed body 101 includes a first power transmission electrode 105 and a second power transmission electrode 106 arranged at positions near the boundary surface between the power supply region 100 and the power supplied region 102. The movable body 103 is disposed in the vicinity of the boundary surface, and the first power receiving electrode 107 is disposed so as to face the first power transmitting electrode 105 or the second power transmitting electrode 106 in a non-contact manner. And a second power receiving electrode 108. The first power transmission electrode 105 and the second power transmission electrode 106 and the first power reception electrode 107 and the second power reception electrode 108 are combined to form a capacitor 109, and a series resonance circuit including the capacitor 109 and the coil 110. Thus, it is possible to supply power from the fixed body 101 to the movable body 103 with high efficiency. Specifically, a large number of such fixed bodies 101 are juxtaposed below the floor plate 111, and the power supply can be continued in a non-contact manner while the movable body 103 is running on the floor plate 111. It becomes.

In this power supply system, an AC power supply 115 whose frequency can be controlled by switching is provided on the fixed body 10, and AC power of a desired frequency is supplied to the first power transmission electrode 105 and the second power transmission by the AC power supply 115. The electrode 106 is supplied.

In addition, this power supply system is provided with a function that enables communication between the fixed body 101 and the movable body 103 in order to perform power supply control. Specifically, each fixed body 101 is provided with a communication unit 112, and the movable body 103 is provided with a communication unit 113. Then, a power supply request signal is transmitted from the communication unit 113 of the movable body 103. When the power supply request signal is received by its own communication unit 112, each fixed body 101 performs power supply control assuming that the movable body 103 is positioned above itself.

Further, even when it can be determined that the movable body 103 is located above itself, when the movable body 103 moves in a random direction, the movable body 103 is disposed to face the first power transmission electrode 105. Whether the electrode is the first power receiving electrode 107 or the second power receiving electrode 108, or the electrode disposed opposite to the second power transmitting electrode 106 is the first power receiving electrode 107 or the second power receiving electrode 108. Cannot be specified. Therefore, rectification is performed using the connection portion 114 having a plurality of diodes, and power supply can be continued so as to match the polarity of the load 104 regardless of the opposing arrangement state of each electrode. Further, when the diode is arranged in the movable body 103 in this way and the inductance 110 is provided between the diode and the load 104, the diode 110 is rectified by the diode and series resonance with the capacitor 108 is not established. The inductance 110 is arranged on the fixed body 101 side.

According to this power supply system, since it is not necessary to expose the first power transmission electrode 105 and the second power transmission electrode 106 to the power supply region 102, introduction into a place where a person is present is facilitated. In addition, since it is possible to supply power if the electrodes are arranged facing each other at a distance such that a desired capacitor capacity is generated, it is not necessary to perform precise alignment as in the electromagnetic induction method. In contrast, power can be supplied.

JP-A-9-93704 Japanese Patent Application No. 2007-256369

However, the power supply system described in Patent Document 2 has the following problems to be improved. First, since one AC power supply is provided for each set of the first power transmission electrode and the second power transmission electrode of the fixed body, a large number of these first power transmission electrodes and second power transmission electrodes are arranged in parallel. In such a case, a large number of AC power sources are required, and the structure of the fixed body becomes complicated, which can be simplified, and this contributes to an increase in the manufacturing cost of the fixed body.

Also, since it is necessary to provide a communication unit for each of the fixed body and the movable body, there is a problem that the installation cost of the system increases and the power consumption increases due to the complicated circuit configuration. In addition, since the inductance is arranged on the fixed body, when the size of the movable body changes, it is necessary to change the inductance to maintain the series resonance condition, and the circuit configuration becomes complicated. There was a problem that the installation cost of the system increased.

Further, when the movable body is not disposed at a position where each power transmission electrode and each power reception electrode completely correspond to the vertical direction, and each power reception electrode is disposed so as to be applied only to a part of each power transmission electrode, Since the series resonance condition is not satisfied, there is a problem that the power transmission efficiency is reduced, or it is necessary to satisfy the series resonance condition by shifting the transmission frequency according to the arrangement state of the electrodes.

Therefore, an object of the present invention is to provide a power supply system capable of performing highly efficient power supply with a simple configuration in a non-contact power supply system. Moreover, an object of this invention is to provide the movable body and fixed body for comprising such an electric power supply system.

In order to solve the above-described problems and achieve the object, the power supply system according to claim 1 is configured such that the fixed body is disposed at a position near a boundary surface between the power supply region and the power supplied region. A plurality of first power transmission electrodes and a plurality of second power transmission electrodes to which AC power is supplied, and power to the plurality of first power transmission electrodes and the plurality of second power transmission electrodes And the movable body is disposed so as to face the first power transmission electrode or the second power transmission electrode so as to be opposed to and non-contact across the boundary surface. At least one set of power receiving electrodes constituting a capacitor between one power transmitting electrode or the second power transmitting electrode, and a coil is connected in series with the capacitor to the fixed body or the movable body, Coil series resonance And performing power supply to more the load.

The power supply system according to a second aspect is the power supply system according to the first aspect, wherein the movable body includes an electrode disposed opposite to the plurality of power receiving electrodes and the first power transmitting electrode and the first power transmitting electrode. It is characterized in that it comprises discrimination switching means for discriminating which of the two power transmission electrodes, and switching the connection of the plurality of power reception electrodes to the load based on the discrimination result.

Further, the power supply system according to claim 3 is the power supply system according to claim 1, wherein the movable body has the plurality of power receiving electrodes fixedly connected to the load.

Further, the power supply system according to claim 4 is the power supply system according to any one of claims 1 to 3, wherein the coil is arranged on the movable body.

A power supply system according to a fifth aspect is the power supply system according to any one of the first to fourth aspects, wherein one of the first power transmission electrode and the second power transmission electrode is made of a ferromagnetic material. And the other one of the first power transmission electrode and the second power transmission electrode is formed of a non-magnetic material, and the discrimination switching means includes a permanent magnet, and the permanent magnet and the first The discrimination is performed by using the magnetic force between the second power transmission electrode or the second power transmission electrode.

A power supply system according to a sixth aspect is the power supply system according to any one of the first to fourth aspects, wherein one of the first power transmission electrode and the second power transmission electrode has magnetic characteristics. The magnetic characteristics of the other one of the first power transmission electrode and the second power transmission electrode are different from each other, and the discrimination switching means includes magnetic characteristic detection means for detecting the difference in the magnetic characteristics. The discrimination is performed based on the detection result of the magnetic characteristic detection means.

A power supply system according to a seventh aspect is the power supply system according to any one of the first to fourth aspects, wherein one of the first power transmission electrode and the second power transmission electrode has a predetermined value. An energy output means for outputting the energy is provided, and the determination switching means includes an energy detection means for detecting the energy, and performs the determination based on a detection result of the energy detection means.

The movable body according to claim 8 is a movable body that is disposed in the power supply area and that supplies power supplied from the fixed body disposed in the power supply area to a predetermined load. A plurality of first power transmission electrodes and a plurality of second power transmission electrodes that are arranged and supplied with AC power are sandwiched between mutual boundary surfaces of the power supply region and the power supplied region. And at least one pair of power receiving electrodes constituting a capacitor between the first power transmitting electrode and the second power transmitting electrode, and the capacitor and the capacitor in series. Power is supplied to the load by series resonance with a coil arranged on the fixed body or the movable body so as to be connected.

In addition, the movable body according to claim 9 is the movable body according to claim 8, wherein any of the first power transmission electrode and the second power transmission electrode is disposed so as to face the plurality of power reception electrodes. It is characterized by comprising a discrimination switching means for discriminating whether or not there is and switching the connection of the plurality of power receiving electrodes to the load based on the discrimination result.

Further, the movable body according to claim 10 is characterized in that in the movable body according to claim 8, the plurality of power receiving electrodes are fixedly connected to the load.

Further, the movable body according to claim 11 is the movable body according to any one of claims 8 to 10, wherein the coil is provided.

A fixed body according to a twelfth aspect of the present invention is a fixed body that is disposed in a power supply area and supplies power to a predetermined load via a movable body that is disposed in a power supplied area. With respect to at least one set of power receiving electrodes arranged in a non-contact manner with a boundary surface between the power supply region and the power supplied region interposed therebetween, A plurality of first power transmission electrodes and a plurality of second power transmission electrodes constituting a capacitor therebetween, and an AC power supply for supplying power to the plurality of first power transmission electrodes and the plurality of second power transmission electrodes The power is supplied to the load by series resonance of the capacitor and a coil disposed on the fixed body or the movable body so as to be connected in series to the capacitor.

According to the power supply system according to claim 1, the movable body according to claim 8, or the fixed body according to claim 12, power can be supplied while the power transmission electrode and the power reception electrode are in a non-contact state. Because there is no need to expose the power transmission electrode to the power supply area, the risk of electric shock due to the power transmission electrode touching the human body can be eliminated, and psychological anxiety can be eliminated. As a result, it can be easily introduced in places where people are present. In particular, since power is not supplied when the series resonance condition is not satisfied, even if, for example, the power source of the stationary body is always turned on and a person or an object approaches the power transmission electrode, an electric shock or short circuit is caused. Since there is no fear, the safety of the power supply system can be ensured. In particular, since power is supplied from a common AC power source to the plurality of first power transmission electrodes and the plurality of second power transmission electrodes, an AC power source is provided for each of the first power transmission electrode and the second power transmission electrode. Therefore, the structure of the fixed body can be simplified, and the manufacturing cost of the fixed body can be reduced.

Further, according to the power supply system according to claim 2 or the movable body according to claim 9, the first power transmission electrode and the second power transmission electrode can be discriminated, so the movable body is arranged at an arbitrary position with respect to the fixed body. Even in such a case, it is possible to automatically supply power, and the degree of freedom of arrangement of the movable body is improved.

According to the power supply system according to claim 3 or the movable body according to claim 10, since the plurality of power receiving electrodes are fixedly connected to the load, the configuration of the movable body is further simplified. The manufacturing cost of the movable body can be further reduced.

Further, according to the power supply system according to claim 4 or the movable body according to claim 11, since the coil is arranged on the movable body, the series resonance condition can be adjusted by the movable body, and the fixed body can be adjusted. Since it becomes unnecessary, it becomes easier to supply electric power to various movable bodies using a common fixed body.

Moreover, according to the electric power supply system which concerns on Claim 5, using the magnetic force between a permanent magnet and a 1st power transmission electrode or a 2nd power transmission electrode, a 1st power transmission electrode and a 2nd power transmission electrode are used. Since it can be determined, it is possible to automatically supply power even if the movable body is arranged at an arbitrary position with respect to the fixed body, and the degree of freedom of arrangement of the movable body is improved. In particular, when a permanent magnet is used, the mechanical part can be reduced, so that the durability of the power supply system can be increased.

Further, according to the power supply system of the sixth aspect, since the first power transmission electrode and the second power transmission electrode can be distinguished based on the detection result of the magnetic property detection means, the first power transmission electrode and the second power transmission electrode Since the power transmission electrode can be discriminated, it is possible to automatically supply power even if the movable body is arranged at an arbitrary position with respect to the fixed body, and the degree of freedom of arrangement of the movable body is improved.

Further, according to the power supply system of the seventh aspect, since the first power transmission electrode and the second power transmission electrode can be distinguished based on the detection result of the energy detection means, the first power transmission electrode and the second power transmission Since the electrodes can be discriminated, it is possible to automatically supply power even if the movable body is arranged at an arbitrary position with respect to the fixed body, and the degree of freedom of arrangement of the movable body is improved. For example, when performing discrimination by light, it is not necessary to use a magnetic force, so that the power supply system can be easily introduced even in a region where the use of magnetic force is limited.

1 is a perspective view of a living room to which a power supply system according to Embodiment 1 of the present invention is applied. It is a longitudinal cross-sectional view which simplifies and shows the fixed body and movable body of FIG. It is the principal part enlarged view which showed the fixed body and movable body of FIG. 2 in detail. 2 is a longitudinal sectional view showing a movable body including a discrimination switching unit to which a permanent magnet utilization type discrimination mechanism is applied together with a fixed body 10. FIG. It is a principal part enlarged view of FIG. It is an expanded sectional view of a change switch, (a) is the state arranged opposite to the 2nd power transmission electrode formed with a nonmagnetic material, (b) is the 1st power transmission electrode formed with a ferromagnetic material It is a figure which shows the state arrange | positioned facing. It is an expanded sectional view of a changeover switch, (a) is the state arranged opposite to the 2nd power transmission electrode formed with the nonmagnetic material, (b) is the 1st power transmission electrode formed with the ferromagnetic material It is a figure which shows the state arrange | positioned facing. It is an expanded sectional view of a changeover switch, (a) is the state arranged opposite to the 2nd power transmission electrode formed with the nonmagnetic material, (b) is the 1st power transmission electrode formed with the ferromagnetic material It is a figure which shows the state arrange | positioned facing. It is an expanded sectional view of a changeover switch, (a) is the state arranged opposite to the 2nd power transmission electrode formed with the nonmagnetic material, (b) is the 1st power transmission electrode formed with the ferromagnetic material It is a figure which shows the state arrange | positioned facing. It is an expanded sectional view of a changeover switch, (a) is the state arranged opposite to the 2nd power transmission electrode formed with the nonmagnetic material, (b) is the 1st power transmission electrode formed with the ferromagnetic material It is a figure which shows the state arrange | positioned facing. It is an expanded sectional view of a changeover switch, (a) is the state arranged opposite to the 2nd power transmission electrode formed with the nonmagnetic material, (b) is the 1st power transmission electrode formed with the ferromagnetic material It is a figure which shows the state arrange | positioned facing. It is an expanded sectional view of a changeover switch. It is a longitudinal cross-sectional view which shows a movable body provided with the discrimination | determination switching part to which the discrimination mechanism of a magnetic characteristic detection type is applied with a fixed body. It is an expanded sectional view near the 1st power transmission electrode and power receiving electrode. It is an expanded sectional view of a magnetic probe, (a) is a magnetic probe using an excitation coil and a monitor coil, (b) is a magnetic probe using an excitation coil and a magnetic sensor, and (c) is a parallel resonance of the excitation coil with a capacitor. It is a figure which shows the magnetic probe made to do. It is a figure which shows the usage of the magnetic probe of FIG. 15, (a) is a longitudinal cross-sectional view of the state which attached the magnetic probe to the receiving electrode, (b) is the 2nd power transmission in which the magnetic probe was formed with the nonmagnetic material. FIG. 4C is a longitudinal sectional view showing a state in which the magnetic probe is arranged opposite to the electrode, and FIG. 5C is a longitudinal sectional view showing a state in which the magnetic probe is arranged opposite to the first power transmission electrode formed of a ferromagnetic material. It is a top view of a receiving electrode, (a) is a figure which shows a receiving electrode with an eddy current, (b) is a figure which shows a receiving electrode with a power transmission current, (c) is a figure which shows a receiving electrode with a magnetic probe. It is a longitudinal cross-sectional view which shows a movable body provided with the discrimination | determination switching part to which discrimination | determination of an energy utilization type | mold is applied with a fixed body. It is a longitudinal cross-sectional view which shows a movable body provided with the discrimination | determination switching part to which discrimination | determination of an energy utilization type | mold is applied with a fixed body. It is a figure which shows the magnetic sensor provided with the magnetic amplification panel, (a) is a side view which shows a magnetic sensor with a 1st power transmission electrode and a receiving electrode, (b) is a top view of a magnetic amplification panel and a magnetic sensor, (c) ) Is a longitudinal sectional view of a magnetic amplification panel and a magnetic sensor. It is an expanded sectional view concerning other examples of an energy utilization type changeover switch. FIG. 2 is a perspective view of the periphery of the floor portion in FIG. 1. It is a top view which shows the arrangement | positioning relationship between a power transmission electrode and a power reception electrode. It is a principal part enlarged view of the fixed body and movable body which concern on a modification. It is a principal part enlarged view of the fixed body and movable body which concern on another modification. It is a longitudinal cross-sectional view which simplifies and shows the fixed body and movable body which concern on Embodiment 2 of this invention. It is the principal part enlarged view which showed the fixed body and movable body of FIG. 26 in detail. It is a longitudinal cross-sectional view which simplifies and shows the fixed body and movable body which concern on a modification. It is the principal part enlarged view which showed the fixed body and movable body of FIG. 28 in detail. It is a figure which shows the structure for positioning of a movable body, and is an expanded longitudinal cross-sectional view of a power transmission electrode and a receiving electrode. It is a figure which shows the structure for positioning of a movable body, and is an expanded longitudinal cross-sectional view of a power transmission electrode and a receiving electrode. It is a principal part longitudinal cross-sectional view of the conventional electric power supply system.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, [I] the basic concept common to each embodiment was explained, then [II] the specific contents of each embodiment were explained, and [III] finally, a modification to each embodiment was explained. To do. However, the present invention is not limited to each embodiment.

[I] Basic concept common to the embodiments First, the basic concept common to the embodiments will be described. The power supply system according to each embodiment is a power supply system for supplying power from a fixed body arranged in a power supply area to a movable body arranged in a power supply area. The specific configuration of the power supply area and the power supply area is arbitrary, and includes, for example, an internal space of a building such as a general house or an office building, an internal space of a vehicle such as a train or an airplane, or an outdoor space. Hereinafter, a surface that partitions the power supply region and the power supplied region from each other is referred to as a boundary surface. For example, when the power supply area is a room of a building and the power supply area is a floor of the room, the upper surface (floor surface) of the floor is a boundary surface.

The fixed body includes one having a power source inside the fixed body and one that supplies power supplied from a power source outside the fixed body to the movable body. This fixed body is arranged in the power supply area, but is not limited to one that is permanently immovable and can be removed from the power supply area when not in use, Including those that can move to any position inside. In particular, the entire fixed body is not limited to a fixed one at all times. For example, by adjusting the positions of some components of the fixed body as necessary, the relative relationship between the component and the movable body is increased. Including those that can change the positional relationship.

The movable body includes a thing (stationary body) that is used by being fixedly arranged in the power supply area and a thing that moves as needed inside the power supply area (moving body). The function and specific configuration of the movable body are arbitrary except for special points. For example, the stationary body can include devices such as computers and household appliances, and the mobile body can be a robot or an electric vehicle. Can be mentioned.

In the power supply system configured in this way, power is supplied from the fixed body to the movable body in a non-contact manner. This non-contact power supply is generally performed using a capacitor disposed via a boundary surface. That is, a capacitor (coupling capacitor) is configured by disposing a power transmission electrode provided on a fixed body and a power reception electrode provided on a movable body so as to face each other in a non-contact manner with a boundary surface interposed therebetween. At least two such capacitors are provided and arranged in the power transmission path, and electric field type power transmission is performed through these two capacitors. According to this configuration, since it is not necessary to expose the power transmission electrode of the fixed body to the power supply region, it is possible to improve the safety and durability of the power supply system. In addition, by arranging a plurality of power transmission electrodes, even when the movable body moves, power can be continuously supplied to the movable body, and the degree of freedom of movement of the movable body can be ensured.

In addition, this power supply system supplies power using series resonance. That is, by connecting a coil in series to a capacitor composed of a power transmission electrode and a power reception electrode as described above, a series resonance is generated when a series resonance condition is satisfied, and a high-efficiency power is generated by this resonance effect. Supply can be performed.

In particular, part of the characteristics of the power supply system according to each embodiment is to determine the facing arrangement relationship between the power receiving electrode and the power transmitting electrode on the movable body, and based on the determination result, connect the power receiving electrode to the load. This is in that a discrimination switching means for performing switching is provided. This configuration eliminates the need for rectification using a plurality of diodes as in the prior art, so that the coil can be provided on the movable side and the series resonance condition can be adjusted only on the movable body side. Can be obtained.

[II] Specific Contents of Each Embodiment Next, specific contents of each embodiment will be described.

[Embodiment 1]
First, the first embodiment will be described. In the first embodiment, a switch for power supply on the fixed body side is omitted, while an electrode discrimination switching means is provided on the movable body side.

(overall structure)
FIG. 1 is a perspective view of a living room to which the power supply system according to the present embodiment is applied. In the present embodiment, from a fixed body 10 disposed in a power supply area (here, a space below the floorboard) 1 to a movable body (here, a robot) 20 disposed in a power supply area (here, a living room) 2. An example in which electric power is supplied is shown, and the electric power supply system of this embodiment is configured by including the fixed body 10 and the movable body 20. Here, the floor board 3 laid above the power supply area 1 corresponds to a boundary surface between the power supply area 1 and the power supplied area 2, and a capacitor 5 (FIG. 1) to be described later via the floor board 3. (Not shown) is configured.

(Overall structure-fixed body)
Next, the configuration of the fixed body 10 will be described. 2 is a longitudinal sectional view showing the fixed body 10 and the movable body 20 in a simplified manner in FIG. 1, and FIG. 3 is an enlarged view of a main part showing in detail the fixed body 10 and the movable body 20 in FIG. The fixed body 10 includes an AC power supply 11, a first power transmission electrode 12, a second power transmission electrode 13, a communication unit 14, and a control unit (controller) 16. Although only one fixed body 10 is shown in FIG. 3, actually, a plurality of fixed bodies 10 are juxtaposed along the floor plate 3 in the power supplied region 2 as shown in FIG. 1.

2 and 3, the AC power supply 11 is a supply source of AC power. The AC power supply 11 may be provided in each fixed body 10, but power may be supplied to each of the plurality of fixed bodies 10 from one common AC power supply 11. 2 and 3, one AC power supply 11 is connected to the first power transmission electrode 12 via the line L1, and is connected to the second power transmission electrode 13 via the GND and the line L2. The lines L1 and L2 are connected to the lines L3 and L4, respectively, and the electric power from the common AC power supply 11 is supplied to the fixed bodies 10 via the lines L3 and L4, so that the plurality of first power transmissions Electric power is supplied to the electrode 12 and the plurality of second power transmission electrodes 13. 2 and 3, the configuration for supplying power to the communication unit 14 and the control unit 16 is omitted. However, the AC power source 11 and a power source (not shown) that is different from the AC power source 11 may be arbitrarily selected. It is possible to supply power to the communication unit 14 and the control unit 16 through the path.

The first power transmission electrode 12 and the second power transmission electrode 13 are each a flat conductor, and are arranged so as to be substantially parallel to the floor plate 3 at a position near the lower side of the floor plate 3. The first power transmission electrode 12 and the second power transmission electrode 13 may be brought into contact with the floor board 3 or may be arranged at a minute distance from the floor board 3. In any case, the surface of the first power transmission electrode 12 and the second power transmission electrode 13 on the power supply region 2 side (here, the upper surface in FIGS. 2 and 3) is completely covered by the floor plate 3. The first power transmission electrode 12 and the second power transmission electrode 13 are not exposed to the power supplied region 2. Hereinafter, when it is not necessary to distinguish the first power transmission electrode 12 and the second power transmission electrode 13 from each other, these are simply collectively referred to as “power transmission electrodes” 12 and 13.

3, the communication unit 14 is a communication unit that communicates with a communication unit 25 (described later) provided in the movable body 20. Although the specific configuration of the communication unit 14 is arbitrary, for example, the communication unit 14 is configured using RF / MAC that performs RF communication using the MAC protocol (the same applies to the communication unit 25 described later). The communication unit 14 obtains a communication signal superimposed on the power transmission path from the movable body 20 and output via the lines L1 and L2 via the coupling capacitor 15. The communication signal output via the lines L1 and L2 is blocked by the communication signal blocking coil 18 connected to the lines L1 and L2. The communication unit 14 is communicably connected to the control unit 16 via a line L5. The communication unit 14 is connected to a hub (HUB) 30 via a line L7, and the hub 30 is further connected to a server 31.

The control unit 16 is a control unit that controls the fixed body 10 and is connected to the server 31 via, for example, the hub 30 and performs a control operation in accordance with a control signal from the server 31. However, it is possible to perform independent control by incorporating an independent control program into the control unit 16, and the hub 30 and the server 31 can be omitted. Further, the communication connection destination of the control unit 16 can be other than the server 31. For example, by performing communication with the control unit 16 of another fixed body 10, a plurality of fixed connections arranged in the power supply region 1 can be performed. The body 10 can be controlled in conjunction with each other. Further, the control unit 16 is connected to the AC power supply 11 via a line L8, and controls the power supply to the fixed body 10 by performing ONN / OFF and frequency control of the AC power supply 11. The specific configuration of the control unit 16 is arbitrary, but includes, for example, a CPU (Central Processing Unit) and a program that is interpreted and executed on the CPU.

(Overall structure-movable body)
Next, the configuration of the movable body 20 will be described. The movable body 20 includes a plurality of power receiving electrodes 21, a coil (inductor) 22, a determination switching unit 40, a load 24, and a communication unit 25.

Each of the plurality of power receiving electrodes 21 receives power supplied from the fixed body 10, and is configured as a flat conductor. The plurality of power receiving electrodes 21 are juxtaposed so as to be exposed to the outside at the lowermost part of the movable body 20, and when the movable body 20 is placed on the fixed body 10, it is directly on the upper surface of the floor plate 3. Is arranged substantially parallel to the floor plate 3 at a position in contact with or at a position spaced apart by a minute interval.

In this state, the plurality of power receiving electrodes 21 are arranged to face either the first power transmitting electrode 12 or the second power transmitting electrode 13 with the floor plate 3 interposed therebetween, and the first power transmitting electrode 12 or the second power transmitting electrode 13 is disposed. In addition, a capacitor (coupling capacitor) 5 is formed. Here, since the

power transmission electrodes

12 and 13 are not exposed in the power supplied region 2, the

power transmission electrodes

12 and 13 and the power reception electrode 21 are arranged in a non-contact state.

The coil (inductor) 22 is arranged in series with the capacitor 5 and constitutes a series resonance circuit together with the capacitor 5 to enable power transmission by series resonance. The capacitor 5 can have any configuration and arrangement as long as series resonance is possible. For example, the capacitor 5 may be arranged on the fixed body 10, but is arranged on the movable body 20 here. In particular, by arranging the coil 22 on the movable body 20 in this way, even when power is supplied from the common fixed body 10 to various movable bodies 20, the series resonance condition is set to each movable body 20 side. Thus, it becomes easy to maintain the resonance condition directly for each movable body 20. In the example of FIG. 3, the coil 22 is connected to both terminals of the load 24, but either one may be omitted.

The discrimination switching unit 40 discriminates which of the first power transmitting electrode 12 and the second power transmitting electrode 13 is an electrode disposed to face each of the plurality of power receiving electrodes 21, and based on the determination result. A discrimination switching means for switching the connection of the plurality of power receiving electrodes 21 to the load 24. Although the specific configuration of the determination switching unit is arbitrary, for example, the determination switching unit 40 is branched from a line L10 connected to one terminal (hereinafter referred to as a first terminal) 24a of the load 24 via the coil 22. Line L11, line L13 branched from line L12 connected to the other terminal (hereinafter referred to as second terminal) 24b of load 24 via coil 22, line L14 connected to each power receiving electrode 21, A plurality of change-over switches (specific configurations will be described later) for selectively connecting the line L14 to either the line L11 or the line L13 are provided. Further, the discrimination switching unit 40 discriminates a discrimination mechanism for discriminating which of the first power transmission electrode 12 and the second power transmission electrode 13 is an electrode disposed to face each of the plurality of power receiving electrodes 21. Is provided. A specific configuration of the determination switching unit 40 will be described later.

The load 24 is driven by AC power supplied via the discrimination switching unit 40 and exhibits a predetermined function. For example, when the movable body 20 is configured as a robot as shown in FIG. 1, the load 24 corresponds to a motor or a control unit built in the robot. In addition, the specific configuration of the load 24 is arbitrary, for example, a communication device that performs transmission and reception of communication signals with a device external to the movable body 20 wirelessly or by wire, and information that performs information processing related to various types of information A processing device, a sensor that detects a predetermined detection target in the power supply region 2 and outputs a signal related to the detection result to the predetermined device, or a power source that transmits and receives power to a device outside the movable body 20 (for example, two Secondary battery). The load 24 is not necessarily provided inside the movable body 20. The load 24 is provided outside the movable body 20, and power is supplied to the load 24 via the movable body 20. Good. 2 and 3 show only one load 24, power may be supplied to a plurality of loads 24 connected in series or in parallel to each other.

The communication unit 25 is a communication unit that communicates with the communication unit 14 of the fixed body 10. The communication unit 25 superimposes and outputs the communication signal to the lines L10 and L12 via the coupling capacitor 26. In this power supply system, a frequency of about 1 MHz is used for power supply, but it is assumed that a frequency band near several GHz is used for communication using the

communication units

14 and 25. It is considered that the capacitances of the

capacitors

5, 15, and 26 are sufficiently large for the communication frequency and do not cause a transmission loss.

(Configuration-floorboard)
Next, the floor board 3 shown in FIGS. The floor plate 3 is made of a dielectric material that can constitute the capacitor 5. As such a dielectric material, for example, Teflon (registered trademark) can be adopted. In addition to the case where the dielectric material is used for the floor plate 3, the surface of the

power transmission electrodes

12, 13 on the power receiving electrode 21 side or the surface of the power receiving electrode 21 on the

power transmission electrodes

12, 13 side can be coated. In addition, the material used for the floor plate 3 and the material used for coating the

power transmission electrodes

12 and 13 and the power reception electrode 21 maintain the required insulation between the

power transmission electrodes

12 and 13 and the power reception electrode 21. It is preferable to have an insulation performance for the purpose.

(Details of configuration-discrimination switching unit)
Next, the configuration of the discrimination switching unit 40 will be described in detail. Various types of discriminating mechanisms for the first power transmitting electrode 12 and the second power transmitting electrode 13 by the discriminating switching unit 40 can be considered. In the following, 1) a discriminating switching unit to which a permanent magnet utilizing type discriminating mechanism is applied. 40, 2) A discrimination switching unit 40 to which a magnetic characteristic detection type discrimination mechanism is applied, and 3) a discrimination switching unit 40 to which an energy utilization type discrimination mechanism is applied will be sequentially described.

First, the discrimination switching unit 40 to which a permanent magnet using type discrimination mechanism is applied will be described. FIG. 4 is a longitudinal sectional view showing the movable body 20 including the discrimination switching unit 40 to which a permanent magnet utilization type discrimination mechanism is applied, together with the fixed body 10, and FIG. 5 is an enlarged view of a main part of FIG. In this configuration, one of the first power transmission electrode 12 or the second power transmission electrode 13 (the first power transmission electrode 12 in FIGS. 4 and 5) is made of a ferromagnetic conductor (eg, iron, cobalt, nickel, etc.). The other (second power transmission electrode 13 in FIGS. 4 and 5) is formed of a non-magnetic conductor (for example, aluminum, austenitic stainless steel, etc.). The discrimination switching unit 40 is provided with a plurality of changeover switches 41 that perform line switching by utilizing the difference in magnetic force between the ferromagnetic material and the nonmagnetic material. The changeover switch 41 includes various permanent magnets, which will be described later, and uses the magnetic force between the permanent magnet and the first power transmission electrode 12 or the second power transmission electrode 13 to transmit the first power transmission. Discrimination between the electrode 12 and the second power transmission electrode 13 is performed.

6A and 6B are enlarged cross-sectional views of the changeover switch 41, where FIG. 6A is a state in which it is disposed opposite to the second power transmission electrode 13 formed of a non-magnetic material, and FIG. 6B is formed of a ferromagnetic material. The state arrange | positioned facing the made 1st power transmission electrode 12 is shown. The changeover switch 41 includes a shaft 41a fixed to the movable body 20, an annular permanent magnet 41b supported so as to be movable along the shaft 41a, a movable contact 41c provided on the permanent magnet 41b, and the permanent switch 41c. A spring 41d for urging the magnet 41b away from the

power transmission electrodes

12, 13, a fixed contact 41e connected to the movable contact 41c when the permanent magnet 41b moves to a position away from the

power transmission electrodes

12, 13, and a permanent magnet The stationary contact 41f is connected to the movable contact 41c when the 41b moves to a position close to the

power transmission electrodes

12 and 13.

As shown in FIG. 6A, when the changeover switch 41 is disposed opposite to the second power transmission electrode 13 formed of a nonmagnetic material, the permanent magnet 41b is moved by the bias of the spring 41d. The movable contact point 41c is connected to the fixed contact point 41e. On the other hand, as shown in FIG. 6B, when the changeover switch 41 is disposed opposite to the first power transmission electrode 12 formed of a ferromagnetic material, the permanent magnet stone 41b is applied to the urging force of the spring 41d. In contrast, the movable contact 41c is connected to the fixed contact 41f in the vicinity of the first power transmission electrode 12. Accordingly, the line L11 is connected to one of the fixed

contacts

41e and 41f (the fixed contact 41e in FIG. 6), and the line L13 is connected to the other of the fixed

contacts

41e and 41f (the fixed contact 41f in FIG. 6). By doing so, discrimination between the first power transmission electrode 12 and the second power transmission electrode 13 and switching according to the discrimination result can be performed. As the spring 41d, it is preferable to use a leaf spring because a coil spring has an unnecessary inductance component. The changeover switch 41 is covered with a dust-proof cover 41g, and the dust-proof cover 41g is filled with an inert gas such as argon to prevent the movable contact 41c and the fixed

contacts

41e and 41f from being deteriorated, or the movable contact 41c. It is more preferable to coat the fixed

contacts

41e and 41f with a contact material such as rhodium or ruthenium (the same applies to other change-over switches described later).

Next, another example of the changeover switch using a permanent magnet will be described. 7A and 7B are enlarged cross-sectional views of the changeover switch 42, where FIG. 7A is a state in which it is opposed to the second power transmission electrode 13 formed of a nonmagnetic material, and FIG. 7B is formed of a ferromagnetic material. A state in which the first power transmission electrode 12 is disposed opposite to the first power transmission electrode 12 is shown (however, illustration of the

power transmission electrodes

12 and 13 is omitted in FIG. 7 and FIGS. 8, 11, and 12 described later). The changeover switch 42 includes a permanent magnet 42a, a cantilever 42b that urges the permanent magnet 42a away from the

power transmission electrodes

12 and 13, a movable contact 42c provided at an end portion on the movable side of the cantilever 42b, and a movable contact A pair of fixed

contacts

42d and 42e are provided above and below 42c.

As shown in FIG. 7A, when the changeover switch 42 is disposed opposite to the second power transmission electrode 13 formed of a non-magnetic material, the permanent magnet 42a is activated by the urging force of the cantilever 42b. The movable contact 42c is connected to the fixed contact 42d. On the other hand, as shown in FIG. 7B, when the changeover switch 42 is disposed opposite to the first power transmission electrode 12 formed of a ferromagnetic material, the permanent magnet 42 a is connected to the first power transmission electrode 12. By approaching, the cantilever 42b moves, and the movable contact 42c is connected to the fixed contact 42e. Accordingly, the line L11 is connected to one of the fixed

contacts

42d and 42e (the fixed contact 42d in FIG. 7), and the line L13 is connected to the other of the fixed

contacts

42d and 42e (the fixed contact 42e in FIG. 7). By doing so, discrimination between the first power transmission electrode 12 and the second power transmission electrode 13 and switching according to the discrimination result can be performed. In particular, in this structure, the changeover switch 42 can be made thinner than the structure of FIG.

Next, another example of the changeover switch using a permanent magnet will be described. 8A and 8B are enlarged cross-sectional views of the changeover switch 43, in which FIG. 8A is a state in which it is disposed opposite to the second power transmission electrode 13 formed of a nonmagnetic material, and FIG. 8B is formed of a ferromagnetic material. A state in which the first power transmission electrode 12 is disposed to face is shown. The change-over switch 43 has basically the same configuration as the change-over switch 42 shown in FIG. 7 (the same reference numerals are used for the same configuration), but the cantilever 42b has a permanent magnet 42a connected to the

power transmission electrodes

12 and 13. It differs in that it is biased in the approaching direction, the fixed end of the cantilever 42b is pivotally fixed to the base 43a, and a spring 43b that biases the cantilever 42b upward. .

In this structure, as shown in FIG. 8A, when the changeover switch 43 is disposed opposite to the second power transmission electrode 13 formed of a nonmagnetic material, the cantilever 42b is moved by the urging force of the spring 43b. The movable contact 42c is held at a position away from the second power transmission electrode 13, and the movable contact 42c is connected to the fixed contact 42d. On the other hand, as shown in FIG. 8B, when the changeover switch 43 is disposed opposite to the first power transmission electrode 12 formed of a ferromagnetic material, the permanent magnet 42 a is connected to the first power transmission electrode 12. By approaching, the cantilever 42b moves against the urging force of the spring 43b, and the movable contact 42c is connected to the fixed contact 42e. Accordingly, switching can be performed in the same manner as the changeover switch 42. In particular, in this structure, since the distance between the permanent magnet 42a and the

power transmission electrodes

12 and 13 can be shortened as compared with the structure of FIG. 7, a relatively small magnet can be used as the permanent magnet 42a. The leakage magnetic field from the magnet 42a can be reduced.

Next, another example of the changeover switch using a permanent magnet will be described. FIG. 9 is an enlarged cross-sectional view of the changeover switch 44. (a) is a state of being opposed to the second power transmission electrode 13 made of a nonmagnetic material, and (b) is made of a ferromagnetic material. A state in which the first power transmission electrode 12 is disposed to face is shown. The changeover switch 44 includes a pair of permanent magnets 44a disposed so as to be in contact with the power receiving electrode 21, a yoke (magnetic circuit) 44b connected to each of the permanent magnets 44a, and a magnetic sensor sandwiched between the yokes 44b. 44c and the line L14 connected to the power receiving electrode 21 are switched with respect to either the line L11 or the line L13, and includes a switch 44d driven by the magnetic sensor 44c. Here, the pair of permanent magnets 44 a are arranged so that the polarities of the surfaces in contact with the power receiving electrode 21 are opposite to each other.

In this structure, as shown in FIG. 9A, when the changeover switch 44 is disposed opposite to the second power transmission electrode 13 formed of a nonmagnetic material, the magnetic flux of the permanent magnet 44a is the second. Since it does not flow through the power transmission electrode 13, a magnetic path is not formed, and no magnetic flux flows through the magnetic sensor 44c. In this case, the magnetic sensor 44c drives the switch 44d in the direction shown in FIG. On the other hand, as shown in FIG. 9B, when the changeover switch 44 is disposed opposite to the first power transmission electrode 12 formed of a ferromagnetic material, the magnetic flux of the permanent magnet 44a is changed to the second power transmission electrode. 13, the magnetic path is formed, and the magnetic flux flows through the magnetic sensor 44c. In this case, the magnetic sensor 44c drives the changeover switch in the direction shown in FIG. As the magnetic sensor 44c, an MR (Magneto Resistance magnetoresistive) type element, a Hall element, a reed switch, or the like can be used, and the yoke can be formed of a laminated silicon steel plate, ferrite, laminated fine mete, etc. Same for magnetic sensors). In this structure, there is no mechanically movable part except for the switch 44d. In particular, when an MR type element or a Hall element is used as the switch 44d, the mechanically movable part can be completely eliminated, thereby improving the reliability. (The same applies to the example shown in FIG. 11).

Next, another example of the changeover switch using a permanent magnet will be described. 10A and 10B are enlarged cross-sectional views of the changeover switch 45. FIG. 10A is a state in which it is disposed opposite to the second power transmission electrode 13 formed of a non-magnetic material, and FIG. 10B is formed of a ferromagnetic material. A state in which the first power transmission electrode 12 is disposed to face is shown. The change-over switch 45 switches the permanent magnet 45a disposed so as to be in contact with the power receiving electrode 21 and the line L14 connected to the power receiving electrode 21 with respect to either the line L11 or the line L13. The reed switch 45b is fixed in the vicinity, and the yoke 45c is disposed between the permanent magnet 45a and the reed switch 45b.

In this structure, as shown in FIG. 10A, when the changeover switch 45 is disposed opposite to the second power transmission electrode 13 formed of a nonmagnetic material, the magnetic flux of the permanent magnet 45a is the second. Since the power transmission electrode 13 does not flow, the magnetic flux from the permanent magnet 45a gathers in the reed switch 45b via the yoke 45c, and the movable contact of the reed switch 45b is magnetized and attracted to the yoke 45c, as shown in FIG. Driven in the direction. On the other hand, as shown in FIG. 10B, when the changeover switch 45 is disposed to face the first power transmission electrode 12 formed of a ferromagnetic material, the magnetism of the permanent magnet 45a is the first power transmission electrode. 12, the magnetic flux from the permanent magnet 45a to the reed switch 45b is reduced, the magnetization of the movable contact of the reed switch 45b is eliminated, and it is driven in the direction shown in FIG. In this structure, since there is no mechanical movable part except for the reed switch 45b, reliability can be improved.

Next, another example of the changeover switch using a permanent magnet will be described. FIG. 11 is an enlarged cross-sectional view of the changeover switch 46, in which (a) is arranged opposite to the second power transmission electrode 13 formed of a nonmagnetic material, and (b) is formed of a ferromagnetic material. A state in which the first power transmission electrode 12 is disposed to face is shown. The changeover switch 46 switches the line L14 connected to the permanent magnet 46a, the spring 46b that supports the permanent magnet 46a, the magnetic sensor 46c, and the power receiving electrode 21 to either the line L11 or the line L13. The switch 46d is driven by a magnetic sensor 46c.

In this structure, as shown in FIG. 11A, when the changeover switch 46 is disposed opposite to the second power transmission electrode 13 formed of a nonmagnetic material, the permanent magnet 46a is magnetically detected by a spring 46b. Since the magnetic flux of the permanent magnet 46a is detected by the magnetic sensor 46c, the magnetic sensor 46c drives the switch 46d in the direction shown in FIG. On the other hand, as shown in FIG. 11B, when the changeover switch 46 is disposed opposite to the first power transmission electrode 12 formed of a ferromagnetic material, the permanent magnet 46a resists the urging force of the spring 46b. As a result, the magnetic flux of the permanent magnet 46a is no longer detected by the magnetic sensor 46c, and the magnetic sensor 46c drives the switch 46d in the direction shown in FIG. 11B. In this structure, the change of the magnetic flux density can be increased by moving the permanent magnet 46a, and the detection by the magnetic sensor 46c can be reliably performed.

Next, another example of the changeover switch using a permanent magnet will be described. FIG. 12 is an enlarged cross-sectional view of the changeover switch 47. The change-over switch 47 is formed of a non-magnetic material such as aluminum, and is configured such that an inner casing 47b is movably accommodated in an outer casing 47a disposed so as to be in contact with the power receiving electrode 21. Has been. A spring 47c is provided between the inner upper surface of the outer casing 47a and the outer bottom surface of the inner casing 47b, and the inner casing 47b is urged away from the power receiving electrode 21 by the spring 47c. The inner casing 47b includes a permanent magnet 47d that is movably accommodated, a fixing portion 47e that is fixed to the outer casing 47a via an opening (not shown), and the outer casing 47a that is connected to the inner casing 47b via the fixing portion 47e. The micro switch 47f fixed to the housing is accommodated. The micro switch 47f has a contact 47g between the micro switch 47f and the inner casing 47b, and switches the switch 47h according to the ON / OFF state of the contact.

In this structure, when the changeover switch 47 is disposed opposite to the second power transmission electrode 13 formed of a nonmagnetic material, the permanent magnet 47d is not attracted to the second power transmission electrode 13, The casing 47b is urged away from the power receiving electrode 21 by the spring 47c, and the contact 47g of the micro switch 47f is turned off without being pressed against the inner casing 47b. On the other hand, when the changeover switch 47 is disposed opposite to the first power transmission electrode 12 formed of a ferromagnetic material, the permanent magnet 47d is attracted to the first power transmission electrode 12, so that the inner casing 47b is Since it is attracted to the power receiving electrode 21 against the biasing force of the spring 47c, the contact 47g of the micro switch 47f is pressed against the inner casing 47b to be turned on. By driving the switch 47h according to the on / off state of the micro switch 47f, the line L14 can be selectively connected to either the line L11 or the line L13.

Next, the discrimination switching unit 40 to which the magnetic characteristic detection type discrimination mechanism is applied will be described. FIG. 13 is a longitudinal sectional view showing the movable body 20 including the determination switching unit 40 to which the magnetic characteristic detection type determination mechanism is applied together with the fixed body 10. In this configuration, the magnetic characteristics of either the first power transmission electrode 12 or the second power transmission electrode 13 and the magnetic characteristics of the other of the first power transmission electrode 12 or the second power transmission electrode 13 are mutually interchanged. Shall be different. And the discrimination | determination switch part 40 is provided with the various search probes mentioned later as a magnetic characteristic detection means which detects the difference in a magnetic characteristic, Based on the detection result of this search probe, it is the 1st power transmission electrode 12 and 2nd. Discrimination from the power transmission electrode 13 is performed.

A specific configuration example of the discrimination switching unit 40 to which such a magnetic characteristic detection type discrimination mechanism is applied will be described. FIG. 14 is an enlarged cross-sectional view of the vicinity of the first power transmission electrode 12 and the power reception electrode 21. In this example, the floor plate 3 on the upper surface of the first power transmission electrode 12 is formed as a rubber magnet 3A. On the other hand, the power receiving electrode 21 is formed of a nonmagnetic material, and the power receiving electrode 21 is provided with a search probe 50. The search probe 50 includes

magnetic sensors

50a and 50b. Then, the

magnetic sensor

50a, 50b detects the magnetic flux from the rubber magnet 3A to search for the first power transmission electrode 12, and based on the search result, the line L14 is switched between the line L11 and the line L13 via the switch. One of them is selectively switched (the switches and the lines L11, L13, L14 can be configured in the same manner as in FIG. 9, for example, and are not shown). The plurality of

magnetic sensors

50a and 50b are provided because the magnetic flux generated by the rubber magnet 3A creates only one direction of magnetic field, and the plurality of

magnetic sensors

50a and 50b have different sensor azimuths. It is arranged.

Another example of a magnetic property detection type search probe will be described. 15A and 15B are enlarged sectional views of the magnetic probe, wherein FIG. 15A is a magnetic probe 51 using an excitation coil 51a and a monitor coil 51b, FIG. 15B is a magnetic probe 52 using an excitation coil 52a and a magnetic sensor 52b, and FIG. ) Shows a magnetic probe 53 that resonates the exciting coil 53a in parallel with a capacitor 53b. In the example of FIG. 15A, a magnetic field is generated by the exciting coil 51a excited by the AC power supply, and the difference in the influence that this magnetic field receives from the first power transmitting electrode 12 and the second power transmitting electrode 13 is detected by the monitor coil 51b. Detect. In the example of FIG. 15B, a magnetic field is generated by the exciting coil 52a excited by an AC power source, and the difference in the influence that this magnetic field receives from the first power transmission electrode 12 and the second power transmission electrode 13 is determined by the magnetic sensor 52b. Detect. In the example of FIG. 15C, when the magnetic field is generated by the excitation coil 53a excited by the AC power supply, the capacitance of the capacitor 53b connected in parallel to the excitation coil 53a is changed to change the first power transmission electrode 12 or the first power transmission electrode 12. The first power transmission electrode 12 and the second power transmission electrode 13 are discriminated based on the resonance frequency when the parallel resonance condition is satisfied in accordance with the two power transmission electrodes 13.

FIG. 16 shows how to use the magnetic probes 51 to 53 shown in FIG. In FIG. 16, (a) is a longitudinal sectional view of the magnetic probes 51 to 53 attached to the power receiving electrode 21, and (b) is the second power transmission electrode 13 in which the magnetic probes 51 to 53 are formed of a nonmagnetic material. FIG. 5C is a longitudinal sectional view of the magnetic probes 51 to 53 arranged in opposition to the first power transmission electrode 12 formed of a ferromagnetic material. As shown in FIG. 16A, when the power receiving electrode 21 to which the magnetic probes 51 to 53 are attached is excited in the space, almost 100% of the magnetic flux generated by the magnetic probes 51 to 53 is different from the magnetic probes 51 to 53. On the other hand, the inductance becomes a large value. As shown in FIG. 16B, when the power receiving electrode 21 to which the magnetic probes 51 to 53 are attached is opposed to the second power transmitting electrode 13 formed of a nonmagnetic material such as aluminum, the magnetic probes 51 to 53 are arranged. As a result of the magnetic flux penetrating through the non-magnetic material, a magnetic flux in the direction opposite to the eddy current is generated, and the magnetic flux from the magnetic probes 51 to 53 is magnetically canceled. For this reason, the inductance looks small. As shown in FIG. 16C, when the power receiving electrode 21 to which the magnetic probes 51 to 53 are attached is disposed opposite to the first power transmitting electrode 12 formed of a ferromagnetic material such as iron, the magnetic probes 51 to 53 are arranged. A part of the magnetic flux due to the light passes through the first power transmission electrode 12, but most of the magnetic flux passes through the magnetic path flowing through the first power transmission electrode 12, so that a magnetic field in the opposite direction is not generated and the inductance has a large value. . Accordingly, the difference between the first power transmission electrode 12 and the second power transmission electrode 13 is detected by the capacitance change of the monitor coil 51b, the magnetic sensor 52b, or the capacitor 53b. It is possible to switch. When the magnetic probes 51 to 53 are arranged on the first power transmission electrode 12 as described above, a magnetically permeable material is used for the floor plate 3.

Next, the structure of the power receiving electrode 21 in which the magnetic probes 51 to 53 are arranged will be described in more detail. FIG. 17 is a plan view of the power receiving electrode 21, (a) is a diagram showing the power receiving electrode 21 together with eddy currents, (b) is a diagram showing the power receiving electrode 21 together with power transmission current, and (c) is a diagram showing the magnetism of the power receiving electrode 21. It is a figure shown with the probes 51-53. As shown to Fig.17 (a), the receiving electrode 21 is formed in disk shape as a whole, and the some slit 21a is formed along the radial direction (radial direction) from the center. Therefore, even when the power receiving electrode 21 is brought close to the magnetic probes 51 to 53, the eddy current is obstructed by the slit 21a and does not flow (FIG. 17A shows the eddy current for convenience of explanation). However, this eddy current does not actually flow). On the other hand, as shown in FIG. 17B, the current transmitted from the

power transmission electrodes

12 and 13 smoothly flows along the radial direction. As shown in FIG. 17C, for example, the magnetic probes 51 to 53 can be formed in an annular shape as a whole and arranged concentrically with the power receiving electrode 21.

Next, a specific configuration example of the discrimination switching unit 40 to which the energy utilization type discrimination mechanism is applied will be described. FIG. 18 is a longitudinal sectional view showing the movable body 20 including the determination switching unit 40 to which the energy utilization type determination is applied, together with the fixed body 10. In this configuration, energy such as radio waves, magnetic fields, sound waves, vibrations, and light is emitted at a position close to one of the first power transmission electrode 12 or the second power transmission electrode 13 (first power transmission electrode 12 in FIG. 18). An actuator 60 as energy output means is provided, and the power receiving electrode 21 is provided with an energy sensor 61 as energy detection means for detecting this energy as part of the discrimination switching unit 40, and based on the detection result of the energy sensor 61. Thus, the first power transmission electrode 12 and the second power transmission electrode 13 are discriminated.

A specific example of such a structure will be described. FIG. 19 is a longitudinal sectional view showing the movable body 20 including the determination switching unit 40 to which the energy utilization type determination is applied together with the fixed body 10. In the example of FIG. 19, a coil 62 as an actuator 60 is wound around the first power transmission electrode 12, and a magnetic field parallel to the first power transmission electrode 12 is induced by the coil 62. The line L14 is selectively switched to either the line L11 or the line L13 via a switch based on the detection result (the switch and the lines L11, L13). L14 can be configured in the same manner as in FIG. In this case, the first power transmission electrode 12 can be made to function as a magnetic core by forming the first power transmission electrode 12 from iron.

In addition to the structure of FIG. 19, a magnetic amplification panel for amplifying magnetism may be provided. 20A and 20B are diagrams showing a magnetic sensor 63 provided with a magnetic amplification panel 64. FIG. 20A is a side view showing the magnetic sensor 63 together with the first power transmission electrode 12 and the power reception electrode 21, and FIG. 20B is a magnetic amplification panel. 64 and (c) are longitudinal sectional views of the magnetic amplification panel 64 and the magnetic sensor 63. FIG. In this example, a magnetic sensor 63 is arranged inside a magnetic amplification panel 64 formed of a ferromagnetic material, and the magnetic sensitivity amplified by the magnetic amplification panel 64 is detected by the magnetic sensor 63, thereby improving detection sensitivity. It becomes possible. In general, since the magnetic sensor 63 has sensitivity in only one direction, as shown in FIG. 20C, the pair of

magnetic sensors

63A and 63B may be superposed so that the respective sensitivity directions are orthogonal to each other. preferable. Or although illustration is abbreviate | omitted, it is preferable to provide a pair of coils 62 with respect to the 1st power transmission electrode 12 so that each magnetic direction may mutually orthogonally cross.

FIG. 21 is an enlarged cross-sectional view according to another example of the energy utilization type changeover switch. In the example of FIG. 21, a light emitting element 65 is provided in the vicinity of the first power transmission electrode 12 (on the side opposite to the power receiving electrode 21), and light emitted from the light emitting element 65 is received by the light receiving electrode 21. This is detected by the element 66. In this case, the first power transmitting electrode 12 and the power receiving electrode 21 have openings (not shown) so that light can be transmitted (for example, the first power transmitting electrode 12 and the power receiving electrode 21 are meshed). The floor board 3 is also made translucent.

(Configuration-details of power transmission electrode and power reception electrode)
Next, the shapes and arrangement positions of the

power transmitting electrodes

12 and 13 and the power receiving electrode 21 will be described in more detail. 22 is a perspective view of the periphery of the floor portion of FIG. 1, and FIG. 23 is a plan view showing the positional relationship between the

power transmitting electrodes

12 and 13 and the power receiving electrode 21 (in FIG. 23, a plurality of movable members disposed in mutually different directions) Body 20A-20D). In addition, although each part of the fixed body 10 is actually covered with the floor board 3 and disposed in an unexposed state, in FIGS. 22 and 23, the state in which the respective parts of the fixed body 10 are exposed by removing the floor board 3 is illustrated. Show.

As shown in FIG. 22, a plurality of power supply sheets 70 are laid below the floor board 3. Each power supply sheet 70 has a square shape in plan view, and includes at least

power transmission electrodes

12 and 13 as shown in FIG. 23, and further, all or part of the components of the fixed body 10 (AC power supply) 11, the first power transmission electrode 12, the second power transmission electrode 13, the communication unit 14, or the control unit 16). In this configuration, the

power transmission electrodes

12 and 13 can be installed on a sheet basis, so that the installation of the

power transmission electrodes

12 and 13 and the adjustment of the number of installations are facilitated. Thus, when arranging the

power transmission electrodes

12 and 13 side by side, for example, the communication unit 14 of the fixed body 10 is provided one by one for the pair of the first power transmission electrode 12 and the second power transmission electrode 13, One control unit 16 is provided for each power supply sheet 70. However, only one AC power supply 11 is provided for each of the plurality of power supply sheets 70. After laying the plurality of power supply sheets 70, the respective parts of the power supply sheets 70 are connected to each other by known means. It is preferable that the laying range of the power supply sheet 70 corresponds to the power supplied area 2. For example, when the entire area of the living room is the power supplied area 2, the entire area of the living room 70 is almost entirely below the floor plate 3 of the living room. It is preferable to lay the power supply sheet 70, or when only a part of the living room is the power supply area 2, the power supply sheet 70 is laid only below the floor plate 3 of the living room corresponding to the part. May be.

In each power supply sheet 70, a plurality of

power transmission electrodes

12, 13 are arranged in parallel at a predetermined interval from each other in order to increase the laying efficiency of the

power transmission electrodes

12, 13 per unit area. In particular, the first power transmission electrode 12 and the second power transmission electrode 13 are arranged in the vertical direction and the horizontal direction so that the

power transmission electrodes

12 and 13 adjacent in the vertical direction and the horizontal direction shown in the figure have different polarities. They are arranged alternately (in FIG. 23, the first power transmission electrode 12 is shown as a white square and the second power transmission electrode 13 is shown as a square with a diagonal line). Each of the

power transmission electrodes

12 and 13 has a rectangular planar shape so that the performance difference depending on the direction is minimized.

Further, at least a pair of power receiving electrodes 22 may be provided for one movable body 20A to 20D, but here, as shown in FIG. 23, the power receiving electrodes 22 are provided for one movable body 20A to 20D. By arranging a large number, the required power receiving area is secured as a whole. In this way, when a large number of power receiving electrodes 21 are arranged on one movable body 20A to 20D, the shape of the power receiving electrodes 21 arranged in parallel is arbitrary, and may be a circular shape in addition to the rectangular shape as shown in FIG. The individual planar shape of each power receiving electrode 21 may be circular as shown in FIG.

In FIG. 23, each power receiving electrode 21 has a circular planar shape as described above, and the diameter of this circle is sufficiently smaller than the interval between the plurality of

power transmitting electrodes

12 and 13 arranged side by side. Has been determined to be. Therefore, even when the movable bodies 20A to 20D are arranged in various directions as shown in FIG. 23, one power receiving electrode 21 does not straddle both the plurality of

power transmitting electrodes

12 and 13 at the same time. It is prevented that a capacitor is simultaneously formed between one power receiving electrode 21 and the plurality of

power transmitting electrodes

12 and 13, and such a capacitor prevents an adverse effect on power supply. According to this configuration, each power receiving electrode 21 can be arranged at an arbitrary position, and the degree of freedom of movement of the movable bodies 20A to 20D can be increased.

Further, the interval between the plurality of power receiving electrodes 21 is preferably determined so that the capacitor capacity between the plurality of power receiving electrodes 21 does not adversely affect the power supply. Specifically, a current flows from either the first power transmission electrode 12 or the second power transmission electrode 13 to the other one of the first power transmission electrode 12 or the second power transmission electrode 13 via a capacitor. The mutual interval between the power receiving electrodes 21 is determined so as not to occur.

(Power supply control processing)
Next, the power supply control process in the fixed body 10 and the movable body 20 configured as described above will be described with reference to FIG. In this control, a standby mode for reducing the power consumption of the fixed body 10 by setting a part of the functions of the fixed body 10 to a standby state, and a normal operation mode for supplying power with all functions of the fixed body 10 in a movable state. The power supply is performed by switching between the two modes.

For example, the value of the coil 22 is set so that the movable body 20 matches the series resonance condition, and the movable body 20 is arranged at an arbitrary position of the floor board 3 at an arbitrary timing. The communication unit 25 always outputs a power supply request signal.

On the other hand, the fixed body 10 is in a standby mode in the initial state. Specifically, only a small amount of power is supplied to the communication unit 14 so that only the communication unit 14 is in an activated state, and power is not supplied to other portions without supplying power. The communication unit 14 of the fixed body 10 constantly monitors the power supply request signal from the communication unit 25 of the movable body 20, and when the movable body 20 is disposed above the fixed body 10, the communication unit 25. Receives the power supply request signal from the communication unit 14. When the power supply request signal received in this way is transmitted from the communication unit 14 to the control unit 16, the standby mode is switched to the operation mode, the control unit 16 is activated, and the control unit 16 starts power supply control. . According to such power supply control, the power consumption of the stationary body 10 can be reduced as compared with the case where the operation mode is always set.

In addition to such processing, authentication of the movable body 20 by ID may be performed. For example, the ID of the movable body 20 is transmitted together with the power supply request signal from the communication unit 25 to the communication unit 14, and the communication unit 14 that receives this ID transmits the ID to the control unit 16. The control unit 16 further transmits this ID to the server 31 via the hub 30, performs authentication based on the ID registered in advance in the server 31, and returns the authentication result to the control unit 16. And the control part 16 may determine the propriety of electric power supply based on this authentication result.

In the power supply system according to this embodiment, when the movable body 20 is not disposed above the fixed body 10, the series resonance condition is not satisfied, and power is not supplied. Even when a person walks on the floor board 3 while always in the operation mode, it is possible to prevent a situation in which an electric current flows through the human body and maintain safety. For example, in the experiment by the inventor of the present application, when the movable body 20 is arranged above the fixed body 10 and the power transmission output is about 12.7 kW (the output voltage is about 800 V0p), the power transmission efficiency is about 99.99. Although an extremely high efficiency of 6% was shown, when the iron plate is arranged so as to straddle the first power transmission electrode and the second power transmission electrode without arranging the movable body 20, the junction capacitance is movable body 20. The load resistance is about 0.002 m ohm, the power transmission output is about 0.3 mW, and the transmission efficiency is almost 0%, confirming safety.

(Modification of Embodiment 1)
Next, a modification of the first embodiment will be described. FIG. 24 is an enlarged view of main parts of the fixed body 10 and the movable body 20 according to a modification. In the example illustrated in FIG. 24, the communication unit 25 of the movable body 20 transmits communication data such as a power supply request signal and an ID to the fixed body 10 while being superimposed on a power supply line. In the fixed body 10, both ends of the communication unit 14 are connected to a power supply line via a coupling capacitor 15, and a coil 18 for blocking communication data is provided. Thus, only the frequency component of the communication data is separated from the power and received by the communication unit 14. However, if the capacitors 15 are provided at both ends of the communication unit 14 in this way, unnecessary impedance may be increased, so that the capacitor 15 is provided only at one end of the communication unit 14 as shown in FIG. Is more preferable.

FIG. 25 is an enlarged view of a main part of the fixed body 10 and the movable body 20 according to another modification. In the example shown in FIG. 25, the communication unit 25 of the movable body 20 is driven by receiving power supply via the line L15 and wirelessly transmits a power supply request signal. On the other hand, an antenna 17 is connected to the communication unit 14 of the fixed body 10 via a line L6. The antenna 17 is provided between the

power transmission electrodes

12 and 13, and the power supply request signal transmitted from the communication unit 25 is received via the antenna 17 and output to the communication unit 14.

(Effect of Embodiment 1)
According to such a configuration, since there is no need to expose the

power transmission electrodes

12 and 13 to the power supply region 2, the risk of electric shock due to the

power transmission electrodes

12 and 13 touching the human body can be eliminated, and psychologically. This makes it easy to install in places where people are present, such as office spaces. In particular, since power supply is not performed when the series resonance condition is not satisfied, for example, the power source of the stationary body 10 is always turned on, and even when a person or an object approaches the

power transmission electrodes

12 and 13, Since there is no fear of electric shock or short circuit, the safety of the power supply system can be ensured. In particular, since power is supplied from the common AC power supply 11 to the plurality of first power transmission electrodes 12 and the plurality of second power transmission electrodes 13, each of the first power transmission electrode 12 and the second power transmission electrode 13 is provided. It is not necessary to provide the AC power source 11 in the configuration, so that the configuration of the fixed body 10 can be simplified and the manufacturing cost of the fixed body 10 can be reduced.

Moreover, since the 1st power transmission electrode 12 and the 2nd power transmission electrode 13 can be discriminate | determined using the discrimination | determination switching part 40, even if the movable body 20 is arrange | positioned in the arbitrary positions with respect to the fixed body 10, an electric power supply is performed automatically. It becomes possible, and the freedom degree of arrangement | positioning of the movable body 20 improves.

Further, since the coil 22 is disposed on the movable body 20, the series resonance condition can be adjusted by the movable body 20, and adjustment of the fixed body 10 is not necessary. It becomes even easier to supply power to 20.

When the discrimination switching unit 40 is a permanent magnet utilization type, the first power transmission electrode 12 and the second power transmission electrode 12 and the second power transmission electrode 13 are used by using the magnetic force between the first power transmission electrode 12 and the second power transmission electrode 13. Since the power transmission electrode 13 can be discriminated, it is possible to automatically supply power even if the movable body 20 is arranged at an arbitrary position with respect to the fixed body 10, and the degree of freedom of arrangement of the movable body 20 is improved. In particular, when a permanent magnet is used, the mechanical part can be reduced, so that the durability of the power supply system can be increased.

Further, when the discrimination switching unit 40 is of the magnetic characteristic detection type, the first power transmission electrode 12 and the second power transmission electrode 13 can be determined based on the detection result of the magnetic characteristic detection means, so that the first power transmission Since the electrode 12 and the second power transmission electrode 13 can be discriminated, it is possible to automatically supply power even if the movable body 20 is arranged at an arbitrary position with respect to the fixed body 10, and the degree of freedom of the arrangement of the movable body 20 is increased. improves.

In addition, when the determination switching unit 40 is an energy utilization type, the first power transmission electrode 12 and the second power transmission electrode 13 can be determined on the basis of the detection result of the energy detection means. And the second power transmission electrode 13 can be discriminated, so that it is possible to automatically supply power even if the movable body 20 is arranged at an arbitrary position with respect to the fixed body 10, and the degree of freedom of arrangement of the movable body 20 is improved. . For example, when performing discrimination by light, it is not necessary to use a magnetic force, so that the power supply system can be easily introduced even in a region where the use of magnetic force is limited.

[Embodiment 2]
Next, a second embodiment will be described. In the second embodiment, the switch for power supply on the fixed body side is omitted, and the discrimination switching means on the movable body side is also omitted to achieve switchless. However, regarding the configuration and processing of the second embodiment, the configuration and processing that are not particularly described are the same as those of the first embodiment, and the same reference numerals as those of the first embodiment are attached as necessary, and the description thereof is omitted.

26 is a longitudinal sectional view showing the fixed body 10 and the movable body 80 in a simplified manner, and FIG. 27 is an enlarged view of a main part showing the fixed body 10 and the movable body 80 in FIG. 26 in detail. The fixed body 10 supplies power to each of the plurality of fixed bodies 10 from one common AC power supply 11. Specifically, the AC power supply 11 includes a DC power supply 11A and a switching unit 11B that switches a plurality of transistors and diodes by a switching control unit, as in FIG. 32 related to the conventional system. The DC current from the DC power source 11A is switched by the switching unit 11B to obtain an AC current having a predetermined frequency.

The movable body 80 includes a pair of power receiving electrodes 21. Here, the determination switching unit 40 of the first embodiment is omitted, and one power receiving electrode 21 is fixedly connected to the one terminal 24a of the load 24 through the line L11 so as not to be switched, The other power receiving electrode 21 is fixedly connected to the other terminal 24b of the load 24 through the line L13 so as not to be switched. That is, in the second embodiment, the movable body 80 is a small device, and the pair of power receiving electrodes 21 are arranged at positions corresponding to the first power transmitting electrode 12 and the second power transmitting electrode 13. It is assumed that the user moves the movable body 80 by hand while positioning the movable body 80 and installs it at a desired position. For this reason, the pair of power receiving electrodes 21 has a one-to-one correspondence with the first power transmitting electrode 12 and the second power transmitting electrode 13, and the determination switching unit 40 can be omitted. ing. Further, a smoothing capacitor 81 is connected to the movable body 80. The smoothing capacitor 81 is connected in parallel to the load 24 and smoothes the DC power supplied via the coil 22.

Here, when the power supply request signal is continuously output from the communication unit 25 while the movable body 80 is moving, a power source for driving the communication unit 25 (for example, a battery (not shown) built in the movable body 20). May be excessive. For this reason, the movable body 80 is provided with a control unit (controller) 82 that is communicably connected to the load 24 and the communication unit 25 via the lines L16 and L17. The control unit 82 is connected to a switch 83, an OK indicator lamp 84, and an NG indicator lamp 85. In addition, the control unit 82 is connected to a current detection detection unit (Hall element) 86 connected between the coil 22 and the load 24 via the line L18, whereby the current detected by the Hall element 86 is detected. Can be monitored. Further, the control unit 82 is connected between the load 24 and the hall element 86 via a line L19, and can monitor the voltage supplied to the load 24. In such a configuration, when the user presses the switch 83 after installing the movable body 80 at a desired position, the control unit 82 controls the communication unit 25 to output a power supply request signal. Then, the control unit 82 determines the presence or absence of power supply from the fixed body 10 based on the monitored current and voltage, and when there is no power supply, turns on or blinks the NG indicator lamp 85 to supply power. If there is, the OK indicator 84 is turned on or blinked.

FIG. 28 is a longitudinal sectional view schematically showing the fixed body 10 and the movable body 80 according to the modification, and FIG. 29 is an enlarged view of a main part showing the fixed body 10 and the movable body 80 in FIG. 28 in detail. This movable body 80 is configured by omitting the coil 22 shown in FIGS. When the oscillation frequency is sufficiently high, the impedance of the capacitor 5 becomes small, so that power transmission is possible without using series resonance, and thus the coil 22 can be omitted. In addition, the configuration of the movable body 80 can be further simplified.

Here, in the example shown in FIGS. 26 to 29, it is assumed that the user positions the movable body 80 by himself / herself, and therefore it is preferable to devise a device that can easily perform the positioning. Below, such a device is demonstrated. FIGS. 30A to 30C and FIGS. 31A to 31B are enlarged longitudinal sectional views of the

power transmitting electrodes

12 and 13 and the power receiving electrode 21. FIG.

In the example of FIG. 30 (a), it is assumed that the

power transmitting electrodes

12, 13 and the power receiving electrode 21 are different from each other on the assumption that they are formed of a nonmagnetic conductive material such as aluminum. (In the example shown in the figure, the permanent magnets 87 are provided so that the

power transmitting electrodes

12 and 13 are N poles and the power receiving electrode 21 is S poles). According to this configuration, when the relative positions of the

power transmitting electrodes

12 and 13 and the power receiving electrode 21 are greatly shifted, a strong repulsive force is generated, and when the relative positions of the

power transmitting electrodes

12 and 13 and the power receiving electrode 21 are matched. Since a strong suction force is generated, the user can perform positioning more easily by moving the movable body 80 while feeling the repulsive force and the suction force.

In the example of FIG. 30 (b), a recess 88 having a planar shape and a depth corresponding to the shape of the power receiving electrode 21 is formed at a location corresponding to the

power transmitting electrodes

12 and 13 on the floor board 3. According to this configuration, the user can perform positioning more easily by moving the movable body 80 so that the power receiving electrode 21 is accommodated in the recess 88.

In the example of FIG. 30 (c), the portions corresponding to the

power transmission electrodes

12 and 13 in the floor board 3 are formed in a predetermined color different from the other portions (in FIG. 30 (c), A portion having a different color is indicated as 3B). According to this configuration, the user can perform the positioning more easily by moving the movable body 80 so that the power receiving electrode 21 is placed at a position of a predetermined color.

In the example of FIG. 31A, the floor board 3 is translucent or transparent, and the

power transmission electrodes

12 and 13 are visible from the power supply region 2 (in FIG. 31A, translucent or The transparent floor board 3 is indicated by a dotted line). According to this configuration, the user moves the movable body 80 so that the power receiving electrode 21 is placed at a position corresponding to the

power transmitting electrodes

12 and 13 while visually confirming the positions of the

power transmitting electrodes

12 and 13. By doing so, positioning can be performed more easily.

In the example of FIG. 31 (b), the raising 89 is formed on the surface of the floor board 3 on the power supplied region 2 side, but the raising 89 is not formed on the surface corresponding to the

power transmission electrodes

12 and 13. According to this configuration, the user can perform positioning more easily by moving the movable body 80 so that the power receiving electrode 21 is placed in a place where there is no raising 89.

(Effect of Embodiment 2)
According to the second embodiment, in addition to the effects common to the first embodiment, since the plurality of power receiving electrodes 21 are fixedly connected to the load 24, the configuration of the movable body 80 can be further simplified, The manufacturing cost of the movable body 80 can be further reduced.

[III] Modifications to Each Embodiment While the embodiments of the present invention have been described above, the specific configuration and means of the present invention are within the scope of the technical idea of each invention described in the claims. It can be arbitrarily modified and improved within. Hereinafter, such a modification will be described.

(About problems to be solved and effects of the invention)
In addition, the problems to be solved by the invention and the effects of the invention are not limited to the above-described contents, and the present invention solves the problems not described above or has the effects not described above. There are also cases where only some of the described problems are solved or only some of the described effects are achieved.

(Regarding the location of fixed and movable bodies)
In the above embodiment, the fixed body 10 is arranged on the floor portion, and the movable body 20 is arranged on the upper surface of the floor portion. However, the present invention is not limited to these embodiments, and the fixed body 10 and the movable body 20 are arranged. Can be arranged in any direction. For example, the fixed body 10 may be disposed in the wall surface or the ceiling, and the movable body 20 may be disposed in contact with the wall surface or the ceiling or at a predetermined interval.

(About circuit configuration)
The details of the circuit configuration shown in the figure can be arbitrarily changed unless otherwise specified. For example, a smoothing capacitor may be added, or a circuit element for overcurrent protection may be added. The same function may be replaced with another known circuit configuration for the configuration described specially.

(About communication function)
As described above, since the power supply is not performed when the series resonance condition is not satisfied, the power supply of the stationary body 10 may be normally turned on, and in this case, the communication function may be omitted. Even when a communication function is provided, the specific configuration can be modified.

(Applicable items)
One specific application example of the power supply system according to the above-described embodiment is power supply using an electric vehicle as a movable body 20. For example, the fixed body 10 is arranged on the floor surface of an electric vehicle stand, and power can be supplied to the electric vehicle as the movable body 20 stopped on the floor surface. In this case, if necessary, the

power transmission electrodes

12 and 13 may be lifted up together with the floor surface and may be brought close to the power reception electrode 21 provided near the bottom surface of the electric vehicle. Or conversely, the power receiving electrode 21 of the electric vehicle may be lifted down.

DESCRIPTION OF SYMBOLS 1,100 Electric power supply area | region 2,102 Electric power supply area |

region

3,3B, 111 Floor board

3A Rubber magnet

5,15,26,53b, 81,109 Capacitor 10,101 Fixed body 11,115 AC power supply 11A DC power supply

11B Switching part

12, 105 First

power transmission electrode

13, 106 Second

power transmission electrode

14, 25, 112, 113

Communication unit

16, 82 Control unit 17

Antenna

18, 22, 62, 110

Coil

20, 20A to 20D, 80, 103 Movable Body 21 Receiving electrode 21a Slit 24, 104

Load

24a, 24b Terminal 30 Hub 31 Server 40

Discrimination switching unit

41, 42, 43, 44, 45, 46, 47 Changeover

switch 41a Shaft

41b, 42a, 44a, 45a, 46a, 47d 87

Permanent magnets

41c, 42c

Movable contacts

41d, 43b, 4 b,

47c spring

41e, 41f, 42d, 42e fixed contact 41g dust cover 42b cantilever 43a based 44b, 45 c yoke (magnetic circuit)
44c, 46c, 50a, 50b, 52b, 63, 63A, 63B

Magnetic sensor

44d, 46d, 47h, 83 Switch 45b Reed switch 47a Outer housing 47b Inner housing 47e Fixed part 47f Micro switch 47g Contact 50 Search probe 51-53

Magnetic probe

51a, 52a, 53a Excitation coil 51b Monitor coil 60 Actuator 61 Energy sensor 64 Magnetic amplification panel 65 Light emitting element 66 Light receiving element 70 Power supply sheet 84 OK display lamp 85 NG display lamp 86 Detector 88 Recess 89 Raised 107 First Power receiving electrode 108 Second power receiving electrode 114 Connection portion L1 to L19 Line

Claims

A power supply system for supplying power to a predetermined load from a fixed body arranged in a power supply area via a movable body arranged in a power supply area,
The fixed body is
A plurality of first power transmission electrodes and a plurality of second power transmission electrodes which are arranged in the vicinity of the mutual boundary surface between the power supply region and the power supplied region; ,
An AC power supply for supplying power to the plurality of first power transmission electrodes and the plurality of second power transmission electrodes,
The movable body is
Between the first power transmission electrode or the second power transmission electrode, the first power transmission electrode or the second power transmission electrode is disposed so as to face the first power transmission electrode or the second power transmission electrode so as to face the first power transmission electrode or the second power transmission electrode. Comprising at least one pair of power receiving electrodes constituting a capacitor,
Connecting a coil in series with the capacitor to the fixed body or the movable body, and supplying power to the load by series resonance of the capacitor and the coil;
Power supply system characterized by
The movable body is
It is determined whether the electrode disposed opposite to the plurality of power receiving electrodes is the first power transmitting electrode or the second power transmitting electrode, and based on the determination result, the plurality of power receiving to the load Discrimination switching means for switching the connection of the electrodes,
The power supply system according to claim 1, further comprising:
The movable body is
The plurality of power receiving electrodes are fixedly connected to the load;
The power supply system according to claim 1.
Arranging the coil on the movable body;
The power supply system according to any one of claims 1 to 3.
Either the first power transmission electrode or the second power transmission electrode is formed of a ferromagnetic material, and the other of the first power transmission electrode or the second power transmission electrode is formed of a non-magnetic material. Forming,
The determination switching means includes a permanent magnet, and performs the determination using a magnetic force between the permanent magnet and the first power transmission electrode or the second power transmission electrode.
The power supply system according to any one of claims 1 to 4, wherein:
The magnetic characteristic of either the first power transmission electrode or the second power transmission electrode is different from the magnetic characteristic of the other of the first power transmission electrode or the second power transmission electrode. ,
The determination switching unit includes a magnetic characteristic detection unit that detects a difference in the magnetic characteristics, and performs the determination based on a detection result of the magnetic characteristic detection unit;
The power supply system according to any one of claims 1 to 4, wherein:
Either one of the first power transmission electrode or the second power transmission electrode is provided with energy output means for outputting predetermined energy,
The determination switching means includes energy detection means for detecting the energy, and performs the determination based on a detection result of the energy detection means;
The power supply system according to any one of claims 1 to 4, wherein:
A movable body that is disposed in the power supply area and that supplies power supplied from a fixed body disposed in the power supply area to a predetermined load,
For the plurality of first power transmission electrodes and the plurality of second power transmission electrodes arranged on the fixed body and supplied with AC power, the power supply region and the power supplied region Provided with at least one pair of power receiving electrodes constituting a capacitor between the first power transmission electrode or the second power transmission electrode by being arranged in a non-contact manner across the boundary surface,
Power is supplied to the load by series resonance between the capacitor and a coil disposed in the fixed body or the movable body so as to be connected in series to the capacitor;
A movable body characterized by
It is determined whether the electrode disposed opposite to the plurality of power receiving electrodes is the first power transmitting electrode or the second power transmitting electrode, and based on the determination result, the plurality of power receiving to the load Discrimination switching means for switching the connection of the electrodes,
The movable body according to claim 8, comprising:
The plurality of power receiving electrodes are fixedly connected to the load;
The movable body according to claim 8.
Having the coil,
The movable body according to any one of claims 8 to 10, wherein:
A fixed body that is arranged in the power supply area and supplies power to a predetermined load via a movable body arranged in the power supply area,
With respect to at least one set of power receiving electrodes arranged on the movable body, the power receiving area and the power supplied area are arranged in an opposing and non-contact manner across the boundary surface between the power supplying area and the power supplied area. A plurality of first power transmission electrodes and a plurality of second power transmission electrodes constituting a capacitor with the electrodes;
An AC power supply for supplying power to the plurality of first power transmission electrodes and the plurality of second power transmission electrodes,
Power is supplied to the load by series resonance between the capacitor and a coil disposed in the fixed body or the movable body so as to be connected in series to the capacitor;
A fixed body characterized by