JP2018065407A - Burying structure of power supply electrode and noncontact type power supply travel passage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a burying structure of a power supply electrode capable of restraining reduction in power supply efficiency.SOLUTION: A ground plate 12, a base layer material 13 having an insulation property and a surface layer material 16 composed of a raw material less in an electric loss, are laminated in this order on a substrate 11, and a first power supply electrode 14 and a second power supply electrode 15 arranged at a predetermined interval are buried over any one or both of the base layer material 13 and the surface layer material 16. An insulating void structural material 17 where an upper surface forms the same plane as an upper surface of the surface layer material 16, is also provided over the surface layer material 16 from above the ground plate 12 in an area corresponding between the first power supply electrode 14 and the second power supply electrode 15 in a plan view. The first power supply electrode 14 and the second power supply electrode 15 respectively include a plurality of electrode plates 14a and 15a, and electric power is supplied with every sector from a power supply cable 18 with the electrode plate 14a included in the first power supply electrode 14 and the electrode plate 15a included in the second power supply electrode 15 as one sector.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an embedded structure of a power supply electrode and a non-contact power supply traveling path in a power supply apparatus that wirelessly supplies power to a vehicle from a power supply conductor.

2. Description of the Related Art Conventionally, there has been proposed a power supply device that supplies electric power to a vehicle that uses electric energy as power, such as an electric vehicle, an electric cart, and an AGV (Automated Guided Vehicle) (for example, see Patent Document 1).
The power supply device described in Patent Document 1 is configured as follows.
The vehicle side is a vehicle system having a motor powered by electric energy, a rectifier circuit, and wheels, or a vehicle system having a motor powered by electric energy, a battery, a rectifier circuit, wheels, and the like. The wheel side receives electric power from a conductor laid on the road surface side.

  For example, an electrode is disposed on the vehicle body side close to the wheel. Further, a steel belt as a tire inner conductor is provided inside the tire. Capacitance is formed between the conductor laid on the road surface side and the steel belt provided on the wheel side, and between the steel belt provided on the wheel side and the electrode provided on the vehicle body side. As a result, a capacitance is formed between the electrode disposed on the vehicle body side and the conductor laid on the road surface side. High-frequency power energy is transmitted from the conductor laid on the road surface side to the electrode disposed on the vehicle body side via this capacitance.

On the road surface side, electrodes made of a metal flat plate, that is, conductors are continuously arranged or buried on the road surface, and a power supply device that supplies high-frequency power to the conductors is connected.
By the way, for example, when the conductors laid on the road surface side are continuously arranged on the road surface, this is a form equivalent to that of a train track. Therefore, in order to prevent a person from touching two laid conductors at the same time, the arrangement position and arrangement method of the two conductors are restricted.

Also, since roads are generally made of asphalt, etc., if a metal flat plate is laid on the road surface as a conductor, the metal road surface may slip, and there are many points such as maintenance and cost. It is disadvantageous.
Moreover, a general building floor has various things, such as concrete, a carpet, a elongate sheet | seat, and painting, and is determined by the functionality and design nature as a building. Therefore, continuously arranging the electrodes on the floor is a factor that impairs the functionality and design of the building.

JP 2012-175869 A

As a method of laying a conductor as an electrode on the traveling road side, it is conceivable to bury the conductor on the road surface. However, since the power supply efficiency may be affected by the material of the member in which the conductor is embedded, it is not possible to simply embed the conductor.
For example, conductors laid on the road surface side are continuously arranged on the road surface in the road extending direction, and high-frequency power energy is transmitted to the conductors, thereby laying on the road side with the electrodes disposed on the vehicle body side. When high-frequency power energy is transmitted to the electrode disposed on the vehicle body via the capacitance formed between the conductor and the conductor, for example, when a high-frequency current in the MHz band is transmitted to the conductor, The propagation loss of high-frequency power varies greatly depending on electrical characteristics, that is, characteristics such as relative permittivity and dielectric loss tangent. In particular, when a transmission distance is long and high power is transmitted, propagation loss is an important issue.

  Therefore, the present invention has been made paying attention to the above-mentioned conventional unsolved problems, and it is intended to provide a feed electrode embedded structure and a non-contact feed path that can suppress a reduction in feed efficiency. It is aimed.

  According to one aspect of the present invention, a ground plate disposed on a substrate, a base layer material made of an insulating material disposed on the ground plate, and a material with low dielectric loss disposed on the base layer material And a first feeding electrode and a second feeding electrode that are embedded over one or both of the base layer material and the surface layer material and arranged at a predetermined interval from each other, and the first feeding electrode in plan view Connected to the first feeding electrode and the second feeding electrode, in the region corresponding to the second feeding electrode, is provided from the ground plate to the surface layer material, and the upper surface forms the same surface as the upper surface of the surface layer material. A first power supply electrode and a second power supply electrode each including a plurality of electrode plates, one or a plurality of adjacent electrode plates included in the first power supply electrode, and the width direction of the electrode plates One or adjacent to the second feeding electrode Bovine a plurality of electrode plates and a single sector, to the sector, buried structures feeding electrode for feeding power from the power supply cable for each sector, is provided.

  ADVANTAGE OF THE INVENTION According to this invention, while suppressing the fall of electric power feeding efficiency, a propagation loss can be reduced and wireless electric power feeding can be performed with high electric power feeding efficiency.

It is a schematic block diagram which shows an example of the power receiving side apparatus of the electric power feeder which applied this invention. It is sectional drawing which shows an example of schematic structure of the electric power feeding side apparatus of the electric power feeder to which this invention is applied. It is a top view which shows an example of the principal part of an electric power feeding side apparatus. It is a top view which shows the other example of the principal part of an electric power feeding side apparatus.

  In the following detailed description, numerous specific specific configurations are described to provide a thorough understanding of embodiments of the invention. However, it will be apparent that other embodiments may be practiced without limitation to such specific specific configurations. Further, the following embodiments do not limit the invention according to the claims, but include all combinations of characteristic configurations described in the embodiments.

  An embedded structure of a feeding electrode according to an embodiment of the present invention includes a base layer material made of an insulating material arranged on a ground plate, and a surface layer material made of a material with low dielectric loss arranged on the base layer material. A first feeding electrode and a second feeding electrode which are embedded over one or both of the base layer material and the surface layer material and arranged at a predetermined interval from each other, and the first feeding electrode and the second feeding electrode in plan view Between the ground plate and the surface layer material, in an area corresponding to the insulating material whose upper surface forms the same surface as the upper surface of the surface layer material, and a power supply cable connected to the first power supply electrode and the second power supply electrode The first feeding electrode and the second feeding electrode each include a plurality of electrode plates, one or a plurality of adjacent electrode plates included in the first feeding electrode, and the electrode plates arranged in the width direction. One or a plurality of adjacent ones included in the two feeding electrodes A plate as one sector, to the sector, to power for each sector from the power supply cable.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 3 are schematic configuration diagrams illustrating an example of a power supply device to which the present invention is applied, and an example of a power supply device that supplies power to a vehicle such as an electric vehicle, an electric cart, an electric forklift, or an electric automatic transport device. It is.
The power feeding device includes a power receiving side device provided on the vehicle side and a power feeding side device provided on the traveling road side.

The power receiving side device is connected to the first electrode 1 and the second electrode 2 for receiving power, the rectifier circuit 3 connected between the first electrode 1 and the second electrode 2, and the rectifier circuit 3, as shown in FIG. The load 4 is provided. As the load 4, a battery and a motor are installed, or only a motor is installed.
Two wheels are selected from among the wheels of the vehicle for power supply. For example, the right rear wheel is selected as the first wheel 5 and the left rear wheel is selected as the second wheel 6.

  The first electrode 1 is disposed at a position above the first wheel 5 of the vehicle body (not shown) so as to face the outer periphery of the first wheel 5, and similarly above the second wheel 6 of the vehicle body. The second electrode 2 is disposed at the position so as to face the outer periphery of the second wheel 6. For example, flat electrodes may be provided as the first electrode 1 and the second electrode 2 at the tip of a rod that protrudes from the fender of the vehicle toward the outer peripheral surface of the wheel. Alternatively, a flat electrode may be provided on the inner surface of the fender so as to face the outer periphery of the wheel. Further, a steel belt as a tire inner conductor is provided inside the tire. And it arrange | positions between the steel belt provided in the wheel side and the steel belt provided in the wheel side between the 1st power supply electrode 14 and the 2nd power supply electrode 15 which were laid in the below-mentioned traveling road side, and the wheel side. As a result, an electrostatic capacity is formed between the first electrode 1 and the second electrode 2, and as a result, the first electrode 1 disposed on the vehicle body side and the first feeding electrode laid on the traveling road side 14, and between the second electrode 2 and the second power supply electrode 15, a capacitance is formed. High-frequency power is transmitted from the first power supply electrode 14 and the second power supply electrode 15 laid on the traveling road side to the first electrode 1 and the second electrode 2 disposed on the vehicle body side through this capacitance.

  As shown in FIG. 2, the power feeding side device laid on the traveling road side includes a ground plate 12 laminated on the base 11 on which the power feeding side device is installed, and a base layer material 13 laminated just above the ground plate 12. The first power supply electrode 14 and the second power supply electrode 15 disposed on the base layer material 13 at left and right at predetermined intervals, and the first power supply electrode 14 and the second power supply electrode 15 are disposed on the base material 13 so as to cover the first power supply electrode 14 and the second power supply electrode 15. A surface layer material 16, a void structure material 17 provided in a region between the first feeding electrode 14 and the second feeding electrode 15 in a plan view of the surface layer material 16 and the base layer material 13, and the first feeding electrode 14 and the second layer material 13. A power supply cable 18 for supplying power to the power supply electrode 15.

A surface of the surface material 16 opposite to the first power supply electrode 14 and the second power supply electrode 15 is a traveling road surface of a vehicle such as an electric vehicle.
For example, when the power supply side device is installed in a building such as a factory floor, the building slab becomes the base 11. Further, when the power supply side device is installed on a road, a parking lot, or the like, a roadbed or a concrete base layer or the like becomes the base 11.

  As shown in FIG. 3, the first power supply electrode 14 and the second power supply electrode 15 as power supply electrodes are each configured by arranging a plurality of electrode plates 14 a and 15 a in one direction. The electrode plates 14a and 15a are each formed in a plate shape, a sheet shape, or a mesh shape, and are arranged side by side as shown in FIG. The first power supply electrode 14 and the second power supply electrode 15 are connected to a power supply device 19 for supplying high-frequency power via a power supply cable 18. The power supply device 19 for supplying high-frequency power includes one or a plurality of power supply devices, and is disposed in a place that does not interfere with the traveling of the vehicle. The first power supply electrode 14 and the second power supply electrode 15 have a width that allows the first wheel 5 and the second wheel 6 to travel on the first power supply electrode 14 and the second power supply electrode 15 in a plan view in the traveling path of the vehicle. And should be provided at intervals.

  The grounding ground plate 12 is made of, for example, a metal surface material such as a metal plate or a metal sheet, or a metal lattice material such as a metal mesh. The metal plate and the metal sheet are made of a metal having a thickness that sufficiently satisfies the skin depth of the high frequency power, and are made of, for example, iron, aluminum, stainless steel, or the like. The metal mesh is made of a metal member having a lattice interval sufficiently narrower than the wavelength of the high frequency power. The purpose of the ground plate 12 is to suppress the influence when the substrate 11 on which the ground plate 12 is laminated is a dielectric or electrical resistor with loss of high-frequency power, such as soil, roadbed, concrete base layer, etc. Laid in.

  In the ground plate 12, the region where the ground plate 12 is disposed coincides with the first feeding electrode 14 and the second feeding electrode 15 in a plan view, and further, between the first feeding electrode 14 and the second feeding electrode 15. It is arranged to match the area of. In addition, the area | region where the ground plate 12 is arrange | positioned corresponds with the 1st power feeding electrode 14 and the 2nd power feeding electrode 15 in planar view, and also the area | region between the 1st power feeding electrode 14 and the 2nd power feeding electrode 15 You may arrange | position so that it may correspond with a wider area | region including the area | region which corresponds.

The base layer material 13 includes a first base layer material 13 a including a region overlapping the first power supply electrode 14 and a second base layer material 13 b including a region overlapping the second power supply electrode 15 in plan view.
The base layer material 13 is made of an insulating material and made of a material having a small dielectric loss, and reduces the dielectric loss generated between the first feeding electrode 14 and the second feeding electrode 15 and the ground plate 12. The base layer material 13 is made of, for example, a material obtained by mixing asphalt material or cement material with ceramics. The base layer material 13 is not limited to a material in which ceramics are mixed into an asphalt material or a cement-based material, and a material having a relative dielectric constant or dielectric loss tangent or both smaller than that of a general aggregate is used as an asphalt material or cement. It can also be composed of a material mixed in the system material.

  The first power feeding electrode 14 and the second power feeding electrode 15 for power feeding are power transmission paths for performing wireless power feeding, and as shown in FIG. 3, from a plurality of plate-shaped electrode plates arranged in the same direction. Become. The electrode plate 14a included in the first power supply electrode 14 and the electrode plate 15b included in the second power supply electrode 15 have a thickness sufficiently satisfying the skin depth of the high-frequency power and are made of a metal sheet member such as iron, aluminum, and stainless steel. Consists of. The electrode plate 14a and the electrode plate 15a are metal meshes that are arranged with a sufficiently small grid interval compared to the wavelength of the high frequency power supplied from the power supply device 19 for supplying high frequency power via the power supply cable 18. It may also be a sheet shape. The electrode plate 14 a and the electrode plate 15 a may be embedded in the base layer material 13, or conversely, may be embedded in the surface layer material 16. Further, the base layer material 13 and the surface layer material 16 may be embedded between them, and the base layer material 13, the electrode plate 14 a, and the electrode may be embedded so that the surface of the surface layer material 16 that becomes the traveling road surface is flat. The board 15b and the surface layer material 16 should just be laminated | stacked.

The surface layer material 16 is a member serving as a protective layer for the electrode plate 14a and the electrode plate 15a, and also has a function as a road surface layer and a finishing material for a building floor. The surface material 16 prevents a short circuit between the first power supply electrode 14 and the second power supply electrode 15.
The surface layer material 16 includes, in plan view, a first surface layer material 16a that overlaps the first base material layer 13a and a second surface material 16b that overlaps the second base material layer 13b. For example, asphalt material or cement-based material is made of ceramics. Made of mixed material. The surface material 16 is not limited to a material in which ceramics are mixed into an asphalt material or a cement-based material, and a material having a relative dielectric constant and / or a dielectric loss tangent smaller than that of a general aggregate is used as an asphalt material or cement. It can also be composed of a material mixed in the system material.

The surface material 16 is preferably a relatively thin material from the standpoint of efficiency reduction and has a strength capable of withstanding the weight of the vehicle and vibration during travel.
In addition, although the case where the surface layer material 16 consists of the raw material which mixed the asphalt material or the cement-type material with ceramics is demonstrated here, it does not necessarily restrict to this. As will be described later, since only the base material 13 is made of a material in which ceramics are mixed with asphalt material or cement-based material, propagation loss can be suppressed and power supply efficiency can be improved. It may consist of. In this case, as the surface layer material 16, for example, asphalt material, concrete material, ceramic material, plastic, wood, polystyrene foam, or the like can be applied. In addition, when the surface layer material 16 is composed of these materials, the surface layer material 16 is not only composed of a single material, but also a plurality of materials that are multilayered or compounded. May be. Further, it may be made of a member having a low electrical resistance by mixing a highly conductive substance such as metal fiber in concrete or the like.

As shown in FIG. 2, the void structure material 17 includes a laminated body of a first base layer material 13a, a first feeding electrode 14, and a first surface layer material 16a, a second base layer material 13b, a second feeding electrode 15, and a second surface layer. It is provided between the laminates of the material 16b.
The void structure material 17 has a hollow structure whose section is a rectangular parallelepiped, the width of the section is the same as the width between the first feeding electrode 14 and the second feeding electrode 15, and the height of the section is the void structure material 17. Is the height that forms the same plane as the upper surface of the surface layer material 16. The void structure material 17 is made of a material having a strength that can support a vehicle traveling on the upper surface of the void structure material 17 such as ceramics or a resin material, a relatively low dielectric constant, and a high insulation resistance.

In the hollow portion of the void structure material 17, a power supply cable 18 having one end connected to the power supply device 19 is disposed. For example, when supplying single-phase alternating current, two power supply cables 18 are arranged.
The power supply cable 18 is disposed between the first power supply electrode 14 and the second power supply electrode 15 by being disposed in the hollow portion of the void structure material 17 as shown in FIG. 3 in plan view.

  The electrode plate 14a of the first power supply electrode 14 and the electrode plate 15a of the second power supply electrode 15 facing each other across the power supply cable 18 are paired to form two adjacent electrode plates 14a and 15a as one sector. One end of the branch cable 18a is connected to one power supply cable 18 via the switching device 20, and the other end of the branch cable 18a is connected to two electrode plates 14a in the same sector. Similarly, one end of the branch cable 18b is connected to the other power supply cable 18 via the switching device 20, and the other end of the branch cable 18b is connected to two electrode plates 15a in the same sector. Each sector is connected to the power supply cable 18 via the branch cables 18a and 18b, so that power is supplied to each sector.

  For example, as illustrated in FIG. 3, the switching device 20 includes two switches sw <b> 1 and sw <b> 2. The switch sw1 is inserted in the power supply cable 18 and switches the power supply cable 18 to a conductive state or a cut-off state. The switch sw2 is inserted in the branch cable 18a or 18b, and switches the connection between the branch cables 18a and 18b and the power supply cable 18 to a conductive state or a cut-off state. The switch sw2 is provided closer to the power supply device 19 than the switch sw1.

Then, by switching the switch sw1 and the switch sw2 included in the pair of switching devices 20 connected to the electrode plates 14a and 15a in the same sector, power can be supplied to one or a plurality of sectors. Thereby, for example, it is possible to supply power only to the sector where the electric vehicle or the like to be supplied with power exists via the power supply cable 18, and the power can be supplied efficiently.
Here, the switch sw1 and the switch sw2 are controlled by a control device (not shown) mounted on the power supply device 19. The control device detects the current position of the electric vehicle or the like to be fed, identifies the sector corresponding to the current position of the electric vehicle or the like, and switches the switch sw1, so that power is fed from the feeding cable 18 only for the identified sector. Switch sw2.

  The sector length in the direction in which a plurality of sectors are connected is set to be equal to or less than ½ wavelength of the feeding frequency of the power signal (feeding power) transmitted by the feeding cable 18. For example, the feeding frequency is set to 13.56 MHz and the wavelength is about 22 m, and the sector length of each sector is set to ½ or less of the wavelength (about 22 m), that is, about 11 m or less. As a result, a decrease in power supply efficiency due to standing waves in each sector is suppressed. Since the standing wave is shortened by the dielectric constant of the surface layer material 16 and the base layer material 13 around the electrode plates 14a and 15a, the sector length is actually made shorter than 1/2 or less of the feeding frequency. Is desirable. The lengths of the electrode plates 14a and 15a included in the sector in the sector length direction are set according to the number of electrode plates 14a and 15a included in one sector. For example, as shown in FIG. 3, when two electrode plates 14a and two electrode plates 15a are included in one sector, the length of the electrode plates 14a and 15a in the sector length direction is the power supply. It is set to 1/4 wavelength or less of the frequency. For example, when one electrode plate 14a and 15a is included in one sector, the length of the electrode plates 14a and 15a in the sector length direction is set to be equal to or less than ½ wavelength of the power signal feeding frequency. Is done.

  The power supply cable 18 is composed of a cable with low propagation loss, for example, a coaxial cable. Since the branch cables 18a and 18b have a smaller propagation loss in the branch cables 18a and 18b than the power supply cable 18, the branch cables 18a and 18b may not necessarily be configured with a low propagation loss cable, but are configured with a low propagation loss cable. However, it is possible to further reduce the influence of propagation loss.

  In the power supply device formed as described above, each of the first power supply electrode 14 and the second power supply electrode 15 is composed of a plurality of electrode plates 14a and 15a, and includes one electrode plate 14a and one electrode plate 15a. Power is supplied by a power supply cable 18 for each sector including two pairs. Therefore, the propagation loss on each electrode plate 14a, 15a in each sector can be reduced, and as a result, the propagation loss in the first feeding electrode 14 and the second feeding electrode 15 can be reduced.

  That is, since power is supplied for each sector, the propagation loss is determined by the sector length of each sector. For example, a conventional power supply path structure in which the first power supply electrode 14 and the second power supply electrode 15 are composed of a series of power supply electrodes is made of a material having a propagation loss of 5% in a 1 m long power supply path. In this case, the propagation loss at a length of 10 m is 40%. On the other hand, in the power supply apparatus according to the embodiment of the present invention, for example, when the sector length is 1 m, 10 sectors are included, and the total sector length is 10 m, the propagation loss is “5% + power supply”. Propagation loss in cable 18 and branch cables 18a, 18b ". Here, since the coaxial cable is used as the power supply cable 18 and the branch cables 18a and 18b, the propagation loss in the cable such as the power supply cable 18 is very low compared to the propagation loss in the power supply electrode. Therefore, an efficient long-distance power supply path can be formed by using the power supply side device according to the embodiment of the present invention.

Further, the propagation loss that occurs in the extending direction of the power supply cable 18 can be reduced. Therefore, for example, the length of the power supply path that can be supplied by one inverter provided on the power supply device 19 side can be extended. As a result, a cheaper power supply path can be realized.
At this time, the sector length is set to ½ wavelength or less of the power supply frequency of the power signal transmitted by the power supply cable 18. Therefore, it is possible to prevent a decrease in power supply efficiency due to standing wave nodes that occur during long-distance propagation of power. In addition, by setting the sector length to ½ wavelength or less of the power feeding frequency, it is possible to more reliably avoid the occurrence of a power feeding impossible region due to standing waves.

  Further, coaxial cables are used as the power supply cable 18 and the branch cables 18a and 18b. Therefore, even if the distance between the power supply device 19 and the electrode plates 14a and 15a is relatively long, the propagation loss can be reduced. That is, the coaxial cable has a very low loss compared to a power supply path configured by arranging a series of power supply electrodes between the surface layer material 16 and the base layer material 13, and therefore the power supply cable 18 and the branch cable 18a. Even if the propagation distance by 18b becomes longer, it is possible to further increase the distance of the power supply side device, that is, the power supply path, as compared with the conventional power supply path. That is, since the propagation loss of the feed path can be reduced, the feed path can be extended. As a result, for example, it is possible to supply power to the vehicle by traveling on the power feeding path even during traveling, and it is possible to realize a power feeding system that enables power feeding during traveling. In addition, since power can be supplied to the vehicle by traveling on the power feeding path, for example, by laying a power feeding side device along the traveling route of the vehicle, it is possible to travel for a long distance or for a long time. However, it is possible to travel without stopping the vehicle for power supply, and it is not necessary to mount a battery or the like for long-distance travel. Therefore, for example, work efficiency in an electric forklift, an electric automatic transport device, or the like can be improved, and long-distance running can be performed on an electric vehicle, an electric cart, or the like.

  Further, a feeding cable 18 and a branching cable 18a made of a coaxial cable having a low propagation loss are used for each sector including the electrode plate 14a included in the first feeding electrode 14 and the electrode plate 15a included in the second feeding electrode 15. Thus, the first power supply electrode 14 and the second power supply electrode 15 can be insulated from each other by using the void structure material 17 having a hollow void structure. Therefore, it is possible to realize a power supply path with a low propagation loss without a significant increase in cost.

Furthermore, since the void structure material 17 is provided between the first power supply electrode 14 and the second power supply electrode 15, a space is formed between the first power supply electrode 14 and the second power supply electrode 15. Therefore, the first power supply electrode 14 and the second power supply electrode 15 can be easily electrically separated.
In addition, since the power supply cable 18 is disposed in the hollow portion of the void structure material 17, the void structure material 17 can electrically separate the first power supply electrode 14 and the second power supply electrode 15, and The power feeding cable 18 can also be used as a storage place, and the area occupied by the power feeding device on the traveling road side can be reduced.

  Further, the outline of the void structure material 17 is constructed of a material having sufficient strength such as ceramics or a resin material, a relatively low dielectric constant, and a high insulation resistance, and the inside is hollow. Therefore, it is known that the propagation loss is affected by the material between the first power supply electrode 14 and the second power supply electrode 15, but the void structure material 17 is used and the first power supply electrode 14 and the second power supply electrode are used. By insulating the electrode 15 from electrical characteristics close to air, propagation loss can be reduced, and power can be supplied more efficiently.

And since propagation efficiency can be improved in this way, especially in an electric vehicle etc., it can receive electric power supply from a road efficiently. That is, it is possible to travel long distances.
In addition, since the first power supply electrode 14 and the second power supply electrode 15 are embedded on the traveling road side, the first power supply electrode 14 and the second power supply electrode 15 can be realized without any restriction on the arrangement position or the like for avoiding an electric shock or a decrease in design.

  In the above embodiment, the case where the power supply cable 18 is disposed in the hollow portion of the void structure material 17 has been described, but the present invention is not limited to this. For example, the power supply cable 18 is disposed along the extending direction of the first power supply electrode 14 and the second power supply electrode 15 on the opposite side to the void structure material 17 of each of the first power supply electrode 14 and the second power supply electrode 15. You can also Further, the power feeding cable 18 is not necessarily arranged along the first power feeding electrode 14 and the second power feeding electrode 15, and any position can be used as long as power can be fed to the first power feeding electrode 14 and the second power feeding electrode 15. It may be arranged.

  In the above-described embodiment, the case where power is supplied to one or a plurality of sectors by the switching device 20 has been described. However, the present invention is not limited to this. For example, as shown in FIG. 4, the power supply device 19 and the electrode plates 14a and 15a are connected by a pair of power supply cables 18 for each sector. Then, the power supply device 19 may supply power to a sector that needs to be supplied with power via a pair of power supply cables 18 connected to the sector.

  Moreover, in the said embodiment, the case where the void structure material 17 was arrange | positioned on the ground board 12, and the upper surface formed in the height which forms the same surface as the upper surface of the surface layer material 16 as shown in FIG. 2 was demonstrated. However, it is not limited to this. For example, the void structure material 17 is formed to a height that can accommodate the power supply cable 18, an insulating material such as styrene foam is disposed above or below the void structure material 17, and the void structure material 17 or the upper surface of the insulation material The upper surface of the surface material 16 may be the same surface.

  In the above embodiment, as shown in FIG. 3, the electrode plates 14a and 15a included in each of the first feeding electrode 14 and the second feeding electrode 15 do not have to have the same shape. The length of the electrode plates 14a and 15a in the direction in which the electrode plates 14a and 15a are continuous may be any length as long as it is equal to or less than ½ wavelength of the frequency. Further, the number of electrode plates 14a and 15a included in one sector may be adjusted according to the length of the electrode plates 14a and 15a. For example, one length of each of the electrode plates 14a and 15a is about ½ wavelength. If so, the number of electrode plates 14a and 15a included in one sector may be one.

Moreover, in the said embodiment, although the case where the single high frequency energy was transmitted by the 1st feed electrode 14 and the 2nd feed electrode 15 was demonstrated, not only a high frequency energy but the alternating current power of another frequency is transmitted. You may do it.
In addition, a plurality of AC powers having different frequencies may be transmitted by the first power supply electrode 14 and the second power supply electrode 15. In this way, for example, AC power can be transmitted to a plurality of different vehicles using a frequency that is unique to each vehicle.

  Moreover, the surface layer material 16 may be formed in a color tone that increases the contrast with the traveling road surface on which the first feeding electrode 14 and the second feeding electrode 15 are laid. That is, when the first power supply electrode 14 and the second power supply electrode 15 are embedded, for example, the vehicle driver recognizes where the first power supply electrode 14 and the second power supply electrode 15 are embedded in the traveling path. Hateful. By setting the color tone of the surface material 16 so that the contrast with the road surface is high, the driver can easily recognize the region of the surface material 16 in which the first power supply electrode 14 and the second power supply electrode 15 are embedded. be able to. Therefore, even if the first power supply electrode 14 and the second power supply electrode 15 are embedded, the first and second wheels 5 and 6 can be directed to travel on the first and second power supply electrodes 14 and 15. . As a result, power can be accurately supplied to the vehicle.

  Further, by setting the color tone of the upper surface of the void structure material 17 so that the contrast with the surface layer material 16 is increased, the vehicle driver can adjust the position of the void structure material 17, that is, the first power supply electrode 14 and the second power supply electrode. A center line between 15 can be recognized. Therefore, if the void structure material 17 is disposed in the center between the first and second power feeding electrodes 14 and 15, the void structure material 17 is located in the center in the width direction between the first wheel 5 and the second wheel 6. Even if the first and second power supply electrodes 14 and 15 are embedded by steering, the first and second wheels 5 and 6 travel on the first and second power supply electrodes 14 and 15. Can be directed to.

  The power supply electrode burying structure in one embodiment of the present invention can be applied to roads, factory floors, parking lots, and the like. For example, when applied to a road, it is possible to travel long distances of an electric vehicle. Moreover, when arrange | positioning on the floor etc. of a factory, the electric power supply to an electric cart or AGV (automatic guided vehicle) can be performed. In addition, by placing the vehicle in a parking space or a driving space in a parking lot such as a supermarket, a convenience store, or a service area, for example, the electric vehicle can be parked in the parking space or the electric vehicle can be driven toward the parking space. Electric power can be supplied simply by running the vehicle from a parking space toward a general road. That is, the configuration arranged in the vehicle parking space functions as a non-contact type power feeding station, and the configuration arranged in the traveling space functions as a non-contact type power feeding traveling path. Such usage can greatly improve the user-friendliness, and there is an advantage that commercial facilities such as a supermarket can attract customers.

In addition to this, the floors of buildings where motorized forks, AGVs (automated guided vehicles), etc. are expected to travel on designated routes such as airports, distribution warehouses, markets, etc., golf course cart roads, It is also possible to apply a route generally determined outdoors such as a go-cart in an amusement park to a floor or a paved road on which an electric vehicle travels.
In the above embodiment, FIG. 1 illustrates the case where the base layer material 13 and the surface layer material 16 coincide with each other in plan view, but the base layer material 13 and the surface layer material 16 do not necessarily have the same size in plan view. The base layer material 13 and the surface layer material 16 only need to include a region that matches the first feeding electrode 14 and the second feeding electrode 15 in plan view.

It should be noted that the scope of the present invention is not limited to the illustrated and described exemplary embodiments, but includes all embodiments that provide the same effects as those intended by the present invention.
Further, the scope of the invention is not limited to the combinations of features of the invention defined by the claims, but can be defined by any desired combination of specific features among all the disclosed features.

DESCRIPTION OF SYMBOLS 1 1st electrode 2 2nd electrode 3 Rectifier circuit 4 Load 11 Base 12 Ground plate 13 Base material 14 First feeding electrode 14a Electrode plate 15 Second feeding electrode 15a Electrode plate 16 Surface layer material 17 Void structure material 18 Power supply cable 18a, 18b Branch cable 19 Power supply device 20 Switching device

Claims (9)

A ground plate disposed on the substrate;
A base layer material made of an insulating material disposed on the ground plate;
A surface layer material made of a material with low dielectric loss disposed on the base layer material;
A first feeding electrode and a second feeding electrode, which are embedded over one or both of the base layer material and the surface layer material and arranged at a predetermined interval from each other;
An insulating material provided in an area corresponding to between the first feeding electrode and the second feeding electrode in plan view from the ground plate to the surface layer material, and an upper surface forming the same surface as the upper surface of the surface layer material; ,
A power supply cable connected to the first power supply electrode and the second power supply electrode;
With
Each of the first power supply electrode and the second power supply electrode includes a plurality of electrode plates,
One or a plurality of adjacent electrode plates included in the first power supply electrode, and one or a plurality of adjacent electrode plates included in the second power supply electrode aligned in the width direction with the electrode plate as one sector,
An embedded structure of a feeding electrode, wherein power is fed to the sector from the feeding cable for each sector.   2. The buried structure of a feeding electrode according to claim 1, wherein the length of the sector in a direction in which the sectors are continuous is equal to or less than ½ wavelength of a feeding frequency of feeding power by the feeding cable.   The power feeding electrode embedment structure according to claim 1, wherein the power feeding cable is disposed along a direction in which the first power feeding electrode and the second power feeding electrode extend.   The buried structure of a feeding electrode according to any one of claims 1 to 3, wherein the feeding cable is a coaxial cable.   The embedded structure of the feeding electrode according to any one of claims 1 to 4, wherein the insulating material is a void structure material made of an insulating material and having a hollow void inside.   The embedded structure of the feeding electrode according to claim 5, wherein the feeding cable is disposed in the void structure material. The upper surface of the surface layer material becomes the traveling road surface of the vehicle,
The ground plate, the base layer material, the surface layer material, the first feeding electrode and the second feeding electrode, and the insulating material extend in a traveling direction of the vehicle. The buried structure of the feeding electrode according to any one of claims 1 to 6.   The power supply electrode embedding structure according to claim 1, wherein the power supply electrode is embedded in at least one of a road, a factory floor, and a parking lot.   A non-contact type power feed traveling path comprising the power feed electrode embedded structure according to claim 1.

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