JP6098284B2 - Power transmission system, power transmission device, power reception device, and power transmission method - Google Patents

Description

  The present invention relates to a power transmission system, a power transmission device, a power reception device, and a power transmission method in a good conductor medium.

  There is a growing need for early detection of oil spills from undersea oil fields. In the 2010 Gulf of Mexico oil spill, 400,000 tons of oil from the offshore oil field spilled into the Gulf of Mexico, greatly affecting the ecosystem. As a preventive measure for preventing such a spill accident, early detection of an oil spill is required.

  As one method for early detection of this oil spill, there is an increasing expectation for realizing a seabed sensor NW (network). This is because if the sensor NW can be constructed on the seabed, the leakage situation can be monitored in real time.

  The seabed sensor NW is installed, for example, in the seabed at a depth of 500 m or more, several kilometers or more away from the land, in the soil of the seabed, or in the seawater. . This is because when a battery is used to drive the sensor, the replacement cost becomes high, and even when a cable is used, the laying cost becomes high.

  Patent Document 1 proposes a system (wireless power feeding system) that wirelessly feeds equipment such as an excavator installed on the seabed. In the wireless power feeding system described in Patent Document 1, a submarine equipped with a power transmitter approaches an excavator equipped with a power receiver, feeds the sensor wirelessly through seawater, and transmits information from the excavator wirelessly. It is characterized by collecting. Japanese Patent Application Laid-Open No. H10-228561 describes that an antenna to which a magnetic field resonance method using a resonance phenomenon of magnetic field energy is applied is used as a feeding antenna.

  The magnetic resonance type wireless power feeding system described in Patent Document 1 uses a coil having a high Q value to resonate at the same frequency (resonance frequency), thereby improving the mutual inductance of the power transmitting device and the power receiving device. This is a technique for increasing the transmission distance. Therefore, the magnetic field resonance method has a feature that it is possible to achieve both a long power transmission distance and high power transmission efficiency compared to other methods (electromagnetic induction method, radio wave method).

  By the way, in the case of energy transmission in the air, the energy loss in the medium (atmosphere) is smaller than that in seawater, and the main causes of the decrease in power supply efficiency are the conductor loss in the coil, the power transmission device and the power reception device. It consists of a reflection loss such as a leakage flux, and a radiation loss.

  On the other hand, in the case of energy transmission in seawater, since the seawater that is the medium has a much higher conductivity than air, a loss also occurs when energy propagates through the medium. The cause of this energy loss is based on the electrical conductivity in the seawater and the electric field generated in the seawater. That is, a loss occurs when a potential gradient proportional to the product of the conductivity and the electric field is generated in seawater.

US Patent Application Publication No. 2012/0032523 JP 2002-305121 A

Hiroyasu Kifune, “Fundamental research for non-contact power supply to AUV in water” 2009-2011, Grant-in-Aid for Scientific Research (Research project number 21760664)

By the way, when power is supplied wirelessly from a submersible to an electronic device installed in the ocean floor, in the soil on the ocean floor, or in seawater, the power transmitter on the transmission side is not fixed and Or it is floating on the sea. Here, in consideration of the attitude control accuracy of the power transmission side device, there is a possibility of collision or contact if the distance between the power transmission and reception devices is not more than 10 cm. Therefore, between the power transmission side device and the power reception side device. The distance is required to be approximately 10 cm or more.
Therefore, even if the magnetic resonance type wireless power feeding system described in Patent Document 1 is used, if the distance between the power transmission side device and the power reception side device is 10 cm or more, the seabed or the seabed soil It is difficult to supply power to a sensor installed in the water or in seawater because it is impossible to obtain a power supply distance and efficiency necessary for practical use.
Moreover, although the non-patent document 1 and the patent document 2 disclose wireless power feeding technology in seawater, since this technology has not solved the above-described problem, a distance at which sufficient power transmission efficiency can be obtained. Is less than 2 cm, and a practically necessary distance cannot be obtained.

  In the case of the related magnetic field resonance technology, in the atmosphere, efficient energy transmission could be performed only by equalizing the resonance frequency of the coil of the power transmission device and the coil of the power reception device. However, since the relative permittivity is as large as 81 in seawater, the influence of the impedance between the power transmission device and the power reception device is high, and energy transmission can be performed only by using the resonance phenomenon of a simple power transmission / reception device. difficult.

  In addition, when power is supplied wirelessly to the above-mentioned seabed or in the soil of the seabed or in seawater, at least one of the power transmission side or the power reception side is not fixed and Or, since it is floating on the sea, it is very difficult to maintain the relative positional relationship between the power transmission device and the power reception device due to the influence of tidal current, buoyancy, and the like. Therefore, the distance between power transmission / reception devices changes. Along with this, the capacitance formed between the power transmission and reception devices is changed by seawater having a relative dielectric constant of 81, causing a change in resonance frequency and a mismatch in impedance matching. This change in resonance frequency or misalignment causes a significant decrease in power transmission efficiency.

  As described above, in wireless power transmission in seawater, power transmission efficiency is significantly reduced due to seawater having a very high conductivity and a very high dielectric constant compared to air. Specifically, energy is lost in seawater due to high conductivity. Furthermore, due to the high dielectric constant, the transmission efficiency is greatly reduced when the relative position of the power transmitting / receiving device is shifted. Therefore, in order to put into practical use a wireless power transmission system that wirelessly supplies power to sensors installed in the seabed, in the soil on the seabed, or in seawater, it is essential to solve these problems. No technology that solves these problems is known.

  Furthermore, various media as shown in the table of FIG. 36 also have relatively high electrical conductivity and relative dielectric constant. Therefore, the same problem can occur when power is transmitted wirelessly in such a medium in addition to power supply through seawater, seabed sand and earth, or a mixture thereof.

Therefore, the present invention provides a power transmission system, a power transmission device, a power reception device, and a power transmission method that solve the above problems.

In order to achieve the above object, one aspect includes a power transmitting device, a power receiving device, and a sensor, and when a magnetic field is incident, the magnetic field wirelessly transmits power in a good conductor medium that generates an induced current by the magnetic field. In the transmission system, the power transmission device includes a power transmission side antenna including a power transmission side coil and a power transmission side inclusion unit having a dielectric covering the power transmission side coil,
Through the front Kioku electrostatic antenna, the impedance adjustment of the variable capacitor and the variable inductor of the power receiving antenna impedance adjustment and the power receiving apparatus of the variable capacitance and the variable inductor of the impedance and front Kioku conductive antenna of the good conductor medium A power transmission circuit that outputs power at a resonance frequency determined by: a capacitance component (C1 [pF]) that constitutes an impedance of the power transmission antenna and a capacitance component (C1 ′ [pF] of the power transmission circuit) ) And C10, and the combined capacitance component (C2 [pF]) constituting the impedance of the power receiving antenna and the capacitance component (C2 ′ [pF]) of the power receiving circuit of the power receiving device. The capacity component is C20, and the combined capacity component C10, the combined capacity component C20, and the power transmission 30> C3 × d ÷ where C3 is the capacitance component of the capacitance formed by the device and the medium interposed between the power receiving device and d is the distance between the power transmitting antenna and the power receiving antenna. An impedance adjustment unit that adjusts impedance so as to satisfy a relationship of (C10 + C20)> 0.5, and the power reception device includes a power reception side inclusion unit having a power reception side coil and a dielectric covering the power reception side coil. A power transmission system comprising: the power reception side antenna; and a power reception side power transmission circuit that inputs power output from the power transmission device, wherein the sensor is connected to the power reception device and receives power. .
Another aspect is a power transmission system that includes a power transmission device, a power reception device, and a sensor and wirelessly transmits power in a good conductor medium that generates an induced current by the magnetic field when a magnetic field is incident thereon, The power transmission device includes a power transmission side antenna including a power transmission side coil and a power transmission side inclusion portion having a dielectric covering the power transmission side coil, and the impedance of the good conductor medium and the variable power transmission side antenna via the power transmission side antenna. A power transmission side power transmission circuit that outputs power at a resonance frequency determined by an impedance adjustment between a capacitance and a variable inductor, and a variable capacitance of a power reception side antenna of the power reception device and an impedance adjustment of the variable inductor, the power reception device The power receiving side antenna comprising a power receiving side inclusion portion having a power receiving side coil and a dielectric covering the power receiving side coil; and the power transmission A power receiving side power transmission circuit for inputting the power output from the device, a capacitance component (C1 [pF]) constituting an impedance of the power transmission side antenna, and a capacitance component (C1 ′ [pF]) of the power transmission side power transmission circuit, And C20 is a combined capacitance component of a capacitance component (C2 [pF]) constituting the impedance of the power receiving side antenna and a capacitance component (C2 ′ [pF]) of the power receiving side power transmission circuit. An impedance adjusting unit that adjusts impedance so as to satisfy a relationship of 30> C3 × d ÷ (C10 + C20)> 0.5, and the sensor is connected to the power receiving device and receives power. It is the electric power transmission system characterized by these.
Another aspect is a power transmission system that includes a power transmission device, a power reception device, and a sensor and wirelessly transmits power in a good conductor medium that generates an induced current by the magnetic field when a magnetic field is incident thereon, The power transmission device includes a power transmission side antenna including a power transmission side coil and a power transmission side inclusion portion having a dielectric covering the power transmission side coil, and the impedance of the good conductor medium and the power transmission device via the power transmission side antenna of the power transmission device. A power transmission side power transmission circuit that outputs power at a resonance frequency determined by the impedance adjustment between the variable capacitance and variable inductor of the power transmission side antenna and the variable capacitance of the power reception side antenna of the power reception device and the variable inductor; And the power receiving device includes a power receiving side including a power receiving side coil and a dielectric covering the power receiving side coil. And a power receiving side power transmission circuit for inputting the power output from the power transmission device, and the sensor is connected to the power receiving device to receive power, and extends in a direction along the coil surface of the power transmission side inclusion section. The size (d1 [cm]), the outer diameter (d2 [cm]) of the power transmission side coil, the size (d1 [cm]) in the direction along the coil surface of the power reception side inclusion portion, and the power reception side coil Either or both of the outer diameter (d2 [cm]) and the outer diameter (d2 [cm]) satisfy the relationship of ratio (d1 / d2)> 1.2. Another aspect is a power transmission system that includes a power transmission device, a power reception device, and a sensor and wirelessly transmits power in a good conductor medium that generates an induced current by the magnetic field when a magnetic field is incident thereon, The power transmission device includes a power transmission side antenna including a power transmission side coil and a power transmission side inclusion portion having a dielectric covering the power transmission side coil, and the impedance of the good conductor medium and the variable power transmission side antenna via the power transmission side antenna. A power transmission side power transmission circuit that outputs power at a resonance frequency determined by an impedance adjustment between a capacitance and a variable inductor and a variable capacitance of a power reception antenna of the power receiving device and an impedance adjustment between the variable inductor, and includes the power transmission side A first power transmission side inclusion having a first dielectric covering the power transmission side coil, and a second dielectric covering the first power transmission side inclusion The power receiving device includes the power receiving side antenna including a power receiving side coil and a dielectric covering the power receiving side coil, and the power output from the power transmitting device. A power-receiving-side power transmission circuit, and the power-receiving-side inclusion portion includes a first power-receiving-side inclusion portion having a first dielectric covering the power-receiving-side coil, and a first power-receiving-side inclusion portion covering the first power-receiving-side inclusion portion. A power receiving system including a second power receiving side including portion having two dielectrics, wherein the sensor is connected to the power receiving device and receives power.

Another aspect is a transmission device of a power transmission system that includes a power transmission device , a power reception device, and a sensor, and that wirelessly transmits power in a good conductor medium that generates an induced current by the magnetic field when a magnetic field is incident. there are a transmitting antenna consisting of the power transmission side including portion having a dielectric covering the power transmission coil and the power transmission coil, through the power transmission side antenna, and the impedance and the variable capacity before Symbol transmission side antenna conductor medium a transmission-side power transmission circuit for outputting a power at a resonant frequency determined by the impedance adjustment of the impedance adjustment between the variable inductor and the variable capacitor and the variable inductor of the power receiving antenna of the power receiving device, which constitute the impedance of the power transmission antenna Capacitance component (C1 [pF]) and capacitance component (C1 ′ [pF] of the power transmission circuit on the power transmission side ]) And a capacitance component (C2 [pF]) constituting the impedance of the power receiving antenna and a capacitance component (C2 ′ [pF]) of the power receiving circuit of the power receiving device. The combined capacitance component is C20, the capacitance component of the capacitance formed by the combined capacitance component C10, the combined capacitance component C20, and the medium interposed between the power transmission device and the power reception device is C3, and the power transmission side antenna And an impedance adjusting unit that adjusts impedance so as to satisfy a relationship of 30> C3 × d ÷ (C10 + C20)> 0.5, where d is the distance between the power receiving side antenna and the power receiving side antenna. It is a power transmission device.

Another aspect is a receiving device of a power transmission system that includes a power transmitting device , a power receiving device, and a sensor, and that wirelessly transmits power in a good conductor medium that generates an induced current by the magnetic field when a magnetic field is incident. there are, the power receiving antenna consisting of the power receiving side including portion having a dielectric covering the power receiving coil and the receiver coil, through the power receiving antenna, the transmitting antenna of the power transmission apparatus and impedance of the conductor medium variable in the power receiving apparatus characterized by comprising: a receiving-side power transmission circuit for inputting power at a resonant frequency determined by the impedance adjustment of the variable capacitor and the variable inductor of the power receiving antenna the impedance adjustment between the capacitance and the variable inductor is there.

According to another aspect , a power transmission device including a power transmission side antenna including a power transmission side coil and a power transmission side inclusion unit having a dielectric covering the power transmission side coil, and a power reception including a power reception side coil and a dielectric covering the power reception side coil. comprising a power transmission device having a power receiving antenna consisting of the side portion including portion, a power receiving device having a power receiving antenna consisting of the power receiving side including portion having a dielectric covering the power receiving coil and the receiver coil, and a sensor, a magnetic field is when the incident, by the magnetic field, the conductor medium causing induced current therein a power transmission method of a power transmission system in which power is transmitted wirelessly through the power transmission side antenna before Symbol power transmission device, said good conductor medium The impedance of the power transmission side antenna of the power transmission device and the impedance adjustment between the variable inductor and the variable inductor and the power reception side antenna of the power reception device Capacity and and outputting power at a resonant frequency determined by the impedance adjustment of the variable inductor, the capacitance of the transmission-side power transmission circuit of the capacitance components constituting the impedance of the power transmission antenna (C1 [pF]) and the power transmitting device The combined capacitance component with the component (C1 ′ [pF]) is C10, and the capacitance component (C2 [pF]) constituting the impedance of the power receiving antenna and the capacitance component (C2 ′ of the power receiving circuit of the power receiving device). [PF]) is the combined capacitance component C20, and the combined capacitance component C10, the combined capacitance component C20, and the capacitance component of the capacitance formed by the medium interposed between the power transmitting device and the power receiving device is C3. Where 30> C3 × d, where d is the distance between the power transmitting antenna and the power receiving antenna. (C10 + C20)> 0.5 and adjusting the impedance so as to satisfy the relationship, said includes inputting the output electric power of the power transmitting device, the method comprising: receiving a power is connected before Symbol receiving device, the A power transmission method for a power transmission system .

According to another aspect , a power transmission device including a power transmission side antenna including a power transmission side coil and a power transmission side inclusion unit having a dielectric covering the power transmission side coil, and a power reception including a power reception side coil and a dielectric covering the power reception side coil. Transmission of a power transmission system comprising a power receiving device having a power receiving side antenna comprising a side inclusion portion and a sensor, and when a magnetic field is incident, wirelessly transmits power in a good conductor medium that generates an induced current therein by the magnetic field. A power transmission method for an apparatus, wherein the impedance of a good conductor medium and the variable capacitance of the power transmission side antenna are provided via a power transmission side antenna including a power transmission side inclusion portion having a dielectric covering the power transmission side coil and the power transmission side coil. resonant frequency determined by the impedance adjustment of the impedance adjustment between the variable inductor and the variable capacitor and the variable inductor of the power receiving antenna Combined capacitance components in and outputting the power, the power transmission side capacitance components constituting the impedance of the antenna (C1 [pF]) and the power transmission device of the transmission-side power transmission circuit capacitance component (C1 '[pF]) C10, and a combined capacitance component of the capacitance component (C2 [pF]) constituting the impedance of the power receiving antenna and the capacitance component (C2 ′ [pF]) of the power receiving circuit of the power receiving device is C20, The capacitance component of the capacitance formed by the combined capacitance component C10, the combined capacitance component C20, and the medium interposed between the power transmission device and the power reception device is C3, and the power transmission side antenna and the power reception side antenna Impedance satisfying the relationship of 30> C3 × d ÷ (C10 + C20)> 0.5, where d is the distance And adjusting a power transmission method of the transmission apparatus, which comprises a.

According to another aspect , a power transmission device including a power transmission side antenna including a power transmission side coil and a power transmission side inclusion unit having a dielectric covering the power transmission side coil, and a power reception including a power reception side coil and a dielectric covering the power reception side coil. A power transmission system that includes a power receiving device having a power receiving side antenna including a side inclusion portion and a sensor, and wirelessly transmits power in a good conductor medium that generates an induced current by the magnetic field when the magnetic field is incident. A power transmission method for an apparatus, comprising: a power receiving side antenna including a power receiving side including a receiving body and a dielectric covering the power receiving side coil; an impedance of a good conductor medium; The resonance frequency is determined by the impedance adjustment with the inductor and the variable capacitance of the power receiving antenna and the impedance adjustment with the variable inductor. Entering a force, a power transmission method of the receiving apparatus which comprises a.

  According to the invention, when the coil of the power transmission device and the coil of the power reception device are separated from a substantially close state, when the magnetic field is incident, the magnetic field diffuses into the good conductor medium that generates an induced current and disappears. As a result, power can be stably transmitted wirelessly from the power supply source to the sensor in a medium that is a good conductor such as seawater, seabed sand and soil, and a high dielectric material. Therefore, it is possible to stably transmit the power wirelessly from the power supply source capable of being transmitted to the sensor.

It is a figure which shows the minimum structure of the electric power transmission system 1 of this invention. It is a figure showing an outline of power transmission system 1 by a first embodiment of the present invention. It is a figure showing composition of electric power transmission system 1 by a first embodiment of the present invention. 2 is a diagram illustrating a part of an equivalent circuit of the power transmission system 1 when wireless power output from the power transmission device 11 is propagated to the power reception device 12. FIG. It is a figure which shows the influence which the capacity | capacitance component of the power transmission side antenna 111 and the power receiving side antenna 121 and the capacity component produced between power transmission / reception apparatuses has on power transmission efficiency. It is a figure which shows the influence which the ratio of the outer diameter of the power transmission side coil 116 and the dimension of the power transmission side inclusion part 117 has on power transmission efficiency. It is a figure which shows the electric field vector and magnetic field vector in the electric power transmission system 1 by 1st embodiment. It is a figure which shows the pointing vector (energy flow) produced based on the electric field vector and magnetic field vector in the electric power transmission system 1 by 1st embodiment. It is a figure which shows the outline | summary of the electric power transmission system 2 by 2nd embodiment of this invention. It is a figure which shows the structure of the electric power transmission system 2 by 2nd embodiment of this invention. It is a figure which shows the influence which the ratio of the dielectric loss tangent of a 1st dielectric material and the dielectric loss tangent of a 2nd dielectric material has on electric power transmission efficiency. It is a figure which shows the influence which the relative dielectric constant of a 1st dielectric material and the relative dielectric constant of a 2nd dielectric material have on power transmission efficiency. It is a figure which shows the outline | summary of the electric power transmission system 3 by 3rd embodiment of this invention. It is a figure which shows the structure of the electric power transmission system 3 by 3rd embodiment of this invention. It is a figure which shows another structure of the power transmission side antenna of 3rd embodiment of this invention. FIG. 16 is a diagram showing a configuration of the power transmission system 4 according to the fourth embodiment of the present invention. It is a figure which shows an example of the flowchart of the electric power transmission system 4 by 4th embodiment of this invention. It is a figure which shows the structure of the electric power transmission system 5 by 5th embodiment of this invention. It is a figure which shows the structure of the electric power transmission system 6 by the 6th embodiment of this invention. It is a figure which shows the structure of the electric power transmission system 7 by 7th embodiment of this invention. It is a figure which shows the structure of the electric power transmission system 8 by 8th embodiment of this invention. It is a figure which shows the simulation model for demonstrating the effect of the electric power transmission system 1 by 1st embodiment of this invention. It is the upper surface schematic of the power transmission apparatus 41 in Example 1 of this invention. It is a figure which shows the simulation result of the power transmission efficiency in Example 1 of this invention. It is a figure which shows the electric field of the power transmission apparatus 41 and the power receiving apparatus 42 vicinity in the three-dimensional electromagnetic field simulation of Example 1 of this invention. It is a figure which shows the magnetic field of the power transmission apparatus 41 and the receiving device 42 vicinity in the three-dimensional electromagnetic field simulation of Example 1 of this invention. It is a figure which shows the pointing vector of the power transmission apparatus 41 and the power receiving apparatus 42 vicinity in the three-dimensional electromagnetic field simulation of Example 1 of this invention. It is a figure which shows the simulation result of the pointing vector at the time of changing the medium used with the electric power transmission system 1 by Example 1 of this invention from seawater to air | atmosphere. It is a figure which shows the simulation result of the pointing vector in the atmosphere at the time of using a related magnetic field resonance technique. It is a figure which shows the result of having actually experimented in the seawater the effect of the power transmission system 1 by 1st embodiment of this invention. It is a figure which shows the simulation model for demonstrating the effect of the electric power transmission system 3 by 3rd embodiment of this invention. It is the side surface schematic of the power transmission apparatus 51 in Example 2 of this invention. It is the figure which looked at the power transmission side lower coil 5161 of the power transmission apparatus 51 in Example 2 of this invention from the power receiving part side. It is the figure which looked at the power transmission side upper coil 5162 of the power transmission apparatus 51 in Example 2 of this invention from the power receiving part side. It is the figure which looked at the power receiving side lower coil 5261 of the power receiving apparatus 52 in Example 2 of this invention from the power transmission part side. It is the figure which looked at the power receiving side upper coil 5262 of the power receiving apparatus 52 in Example 2 of this invention from the power transmission side. It is a figure which shows the simulation result of the power transmission efficiency in Example 2 of this invention. It is a figure which shows the table | surface which put together the electrical conductivity and relative dielectric constant of various media. FIG. 16 is a diagram showing a configuration of a power transmission system 9 according to a ninth embodiment of the present invention. It is a figure which shows the minimum structure of the power transmission apparatus 11 of this invention. It is a figure which shows the minimum structure of the power receiving apparatus 12 of this invention.

FIG. 1 is a diagram showing a minimum configuration of a power transmission system 1 according to the present invention.
As shown in FIG. 1, the power transmission system 1 of the present invention includes at least a power transmission device 11 and a power reception device 12.
The power transmission device 11 includes a power transmission side antenna 111 and a power transmission side power transmission circuit 112.
The power receiving device 12 includes a power receiving antenna 121 and a power receiving power transmission circuit 122.
The power transmission side antenna 111 and the power reception side antenna 121 are covered with the good conductor medium 13.

<First embodiment>
Hereinafter, a power transmission system 1 according to a first embodiment of the present invention will be described with reference to the drawings.
FIG. 2 is a diagram showing an outline of the power transmission system 1 according to the first embodiment of the present invention.
The power transmission system in the present embodiment includes a power source 15 that is driven in seawater or on the sea, and a sensor 14. The power source 15 is provided with a power transmission device 11. In addition, the power receiving device 12 is connected to the sensor 14. The power transmission device 11 is mounted on a power source 15 that is driven in seawater, and the power reception device 12 is connected to the sensor 14.

FIG. 3 is a diagram showing a configuration of the power transmission system 1 according to the first embodiment of the present invention.
The power transmission system 1 includes a power transmission device 11 and a power reception device 12 as shown in FIG. The power transmission device 11 and the power reception device 12 are covered with a good conductor medium 13. The power transmission device 11 includes a power transmission side antenna (power transmission unit) 111, a power transmission side power transmission circuit 112, and a power transmission side control circuit 114. The power receiving device 12 includes a power receiving antenna (power receiving unit) 121, a power receiving power transmission circuit 122, and a power receiving control circuit 124. The power transmission side antenna 111 includes a power transmission side coil 116 and a power transmission side inclusion portion 117 made of a dielectric covering the power transmission side coil 116. Similarly to the power transmission side antenna 111, the power reception side antenna 121 includes a power reception side coil 126 and a power reception side inclusion portion 127. The power transmission side coil 116 and the power reception side coil 126 are obtained by winding a conductor such as a copper wire a plurality of times. Generally, a helical coil, a spiral coil, or the like is used. However, in the present embodiment, the present invention is limited to these. It is not a thing.
In FIG. 3, the secondary battery 125 is illustrated, but the power transmission system 1 does not necessarily include the secondary battery 125.
Further, the power transmission side coil 116 and the power reception side coil 126 may be divided into an upper coil and a lower coil, for example, as will be described later.
In the present embodiment, the power transmission side antenna 111 and the power reception side antenna 121 in the power transmission system 1 are collectively referred to as a power transmission unit. The power transmission side coil 116 and the power reception side coil 126 are collectively referred to as a power transmission coil. The power transmission unit transmits power from the power transmission device 11 to the power reception device 12, and also functions as an antenna that performs communication between the power transmission device 11 and the power reception device 12.

  The power transmission side inclusion portion 117 and the power reception side inclusion portion 127 are, for example, dielectrics having a relative dielectric constant of about 2 to 20 and a dielectric loss tangent of 0.01 or less, such as polyethylene, polyimide, polyamide, fluororesin, and acrylic. Consists of.

Here, the description will be made on the assumption that the good conductor medium in each embodiment is seawater, but the present invention is not limited to this. A good conductor medium is a medium that generates an induced current by the magnetic field when a magnetic field is incident, and has a conductivity such as river, fresh water, tap water, soil, concrete shown in the table of FIG. It may be a substance having a relative dielectric constant of 1 × 10 ⁻⁴ S / m or more and a relative dielectric constant greater than 1, or a combination thereof.

FIG. 4 is a diagram illustrating a part of an equivalent circuit of the power transmission system 1 when the wireless power output from the power transmission device 11 propagates to the power reception device 12.
The power transmission side power transmission circuit 112 further includes a power transmission side impedance adjustment unit 119 that adjusts the impedance of the power transmission side antenna 111 or the power reception side antenna 121. The power receiving side power transmission circuit 122 further includes a power receiving side impedance adjusting unit 129 that adjusts the impedance of the power transmitting side antenna 111 or the power receiving side antenna 121. Here, the impedance of the power transmission side coil 116 in the power transmission side antenna 111 is mainly derived from an inductive component (inductance component) L1 and a capacitance component (capacitance component) C1 formed by the power transmission side coil 116 and the power transmission side inclusion 117. These are uniquely determined by the shape of the coil, the number of turns, the thickness of the copper wire, the dielectric constant of the dielectric material constituting the power transmission side inclusion section 117, its size, and the like. Similarly, the impedance of the power receiving side coil 126 in the power receiving side antenna 121 includes an inductive component L2 and a capacitance component C2 formed by the power receiving side coil 126 and the power receiving side inclusion portion 127.
In the present embodiment, the power transmission side impedance adjustment unit 119 and the power reception side impedance adjustment unit 129 are collectively referred to simply as an impedance adjustment unit.

The AC power supplied from the power transmission side power transmission circuit 112 to the power reception side power transmission circuit 122 propagates through the equivalent circuit composed of the above-described L1 , L2 , C1 , C2 , L3, and C3. Here, L3 is a mutual inductance component in the power transmission side coil 116 and the power reception side coil 126, and C3 is a capacitance component composed of the power transmission side antenna 111, the power reception side antenna 121, and the good conductor medium 13.

It is important for transmission efficiency when propagating whether impedance matching is achieved at the frequency of the AC power propagating in the propagation path. Therefore, as shown in FIG. 4, the power transmission side impedance adjustment unit 119 includes a variable capacitance component C1 ′, and the power reception side impedance adjustment unit 129 includes a variable capacitance component C2 ′. Adjustments can be made to achieve consistency. Furthermore, by providing the inductors L1 ′ and L2 ′ for adjusting the impedance, the impedance adjustment range can be expanded as compared with the impedance matching only by the variable capacitors C1 ′ and C2 ′. In this way, even if the positional relationship between the power transmitting device 11 and the power receiving device 12 changes during power transmission and the value of C3 fluctuates, C1 ′, C2 ′, L1 ′, and L2 ′ are set so as to compensate for the variation. If adjusted appropriately, stable power can be supplied while maintaining resonance.
As the capacitance changing means, a varactor diode (variable capacitance diode) can be used, or a plurality of capacitances can be combined with a switch transistor. As the inductors L1 ′ and L2 ′ for adjusting the impedance, a phase shifter composed of an operational amplifier, a variable inductor, or the like can be used.

  Here, in the following description, the combined capacitance component of the capacitance component of the transmission-side antenna 111 itself and the capacitance component of the impedance adjustment circuit such as a variable capacitance or a phase shifter is set as C10, and this is referred to as the transmission-side antenna 111. The description will be made as the capacitive component C10 constituting the impedance. Further, a combined inductance component of the inductance component of the power transmission side antenna 111 itself and the inductance component of the impedance adjustment circuit such as a variable capacitor or a phase shifter is set as L10, and this is the inductance constituting the impedance of the power transmission side antenna 111. Explanation is given as the component L10. Similarly, the combined capacitance component of the capacitance component of the power receiving antenna 121 itself and the capacitance component of the impedance adjustment circuit such as a variable capacitor or a phase shifter is set as C20, and this constitutes the impedance of the power receiving antenna 121. This will be described as the capacitive component C20. Further, a combined inductance component of the inductance component of the power receiving antenna 121 itself and the inductance component of the impedance adjustment circuit such as a variable capacitor or a phase shifter is set as L20, and this is the inductance constituting the impedance of the power receiving antenna 121. Explanation is given as the component L20.

  Here, in the power transmission system 1 of the present embodiment, the capacitive component C10 constituting the impedance of the power transmission side antenna 111, the capacitive component C20 constituting the impedance of the power reception side antenna 121, the power transmission side antenna 111, the power reception side. When a predetermined condition is satisfied with respect to the side antenna 121 and the capacitive component C3 formed by the good conductor medium 13 existing therebetween and the distance d between the power transmission side antenna and the power reception side antenna, particularly high power transmission efficiency is obtained. be able to.

FIG. 5 is a diagram illustrating the influence of the capacitance components of the power transmission side antenna 111 and the power reception side antenna 121 and the capacitance component generated between the power transmission and reception devices on the power transmission efficiency.
According to this figure, when impedance matching is taken, C10 [pF], C20 [pF], C3 [pF], and d [cm] are particularly high powers when the condition of the expression (1) is satisfied. It can be seen that transmission efficiency can be obtained.

If impedance matching is achieved, there is no need for an impedance adjustment circuit. In that case, particularly high power transmission efficiency can be obtained when the relationship of 30> C3 × d ÷ (C1 + C2)> 0.5 is satisfied. .
Also, when considering the power of the frequency band of about several 100kHz~1MHz In this embodiment, the power transmission coil 116, outer area of 10cm ² ~30cm ² approximately of the power receiving coil 126, the power transmission side antenna 111 receiving antenna 121 The condition (1) can be satisfied under the condition that the distance d is about 5 cm to 60 cm.

  In the present embodiment, the ratio between the outer diameter of the power transmission side coil 116 and the dimension of the power transmission side inclusion portion 117 and the ratio between the outer diameter of the power reception side coil 126 and the dimension of the power reception side inclusion portion 127 are predetermined. When the condition is satisfied, particularly high power transmission efficiency can be obtained.

FIG. 6 is a diagram illustrating the influence of the ratio between the outer diameter of the power transmission side coil 116 and the dimension of the power transmission side inclusion 117 on the power transmission efficiency.
According to FIG. 6A, the size d1 in the direction along the coil surface of the power transmission side inclusion 117 shown in FIG. 6B is fixed, the outer diameter d2 of the power transmission side coil 116 is varied, and the ratio (d1 By setting / d2) to 1.2 or more, it is possible to obtain a power transmission efficiency that is 5% or more higher than 1 that is the minimum ratio that can be produced. Furthermore, when it is desired to obtain a high power transmission efficiency of 10% or more, the ratio (d1 / d2) is preferably 1.4 or more. However, the outer diameter of the power receiving side coil 126 and the size of the power receiving side inclusion 127 in the power receiving side antenna 121 are also the same as the outer diameter of the power transmission side coil 116 and the size of the power transmission side inclusion 117. Further, if both the power transmission side antenna 111 and the power reception side antenna 121 satisfy the above conditions, a higher effect can be obtained.
The coil surface here is a surface including a loop formed by a current flowing through the coil as an outer shape.

Next, a specific operation of the power transmission system 1 according to the present embodiment will be described in order.
First, the power source 15 that is driven in seawater on which the power transmission device 11 is mounted approaches the power reception device 12 connected to the sensor 14. Next, in the power transmission side power transmission circuit 112, an AC power source (not shown) outputs AC power at a predetermined frequency. Next, the output AC power is supplied to the power transmission side coil 116 via the power transmission side impedance adjustment unit 119 in the power transmission side power transmission circuit 112, and the power transmission side antenna 111 uses the AC power as electromagnetic energy. Send to the outside (good conductor medium 13). Next, the power receiving device 12 receives the transmitted electromagnetic energy at the power receiving antenna 121. Here, the power transmission side impedance adjustment unit 119 and the power reception side impedance adjustment unit 129 are adjusted so that the combined impedance of the power transmission side antenna 111, the power reception side antenna 121, and the good conductor medium 13 resonates at the frequency of the transmission power. ing. The power received by the power receiving side coil 126 via the power receiving side antenna 121 is converted into a power receiving side impedance adjusting unit 129 in the power receiving side power transmission circuit 122 and a converter (not shown) in the power receiving side power transmission circuit 122. Flow into. The energy converted from alternating current to direct current by this converter is supplied to the sensor 14 to complete the power transmission. Part or all of the energy converted from alternating current to direct current by the converter may be supplied to the sensor 14 via the secondary battery 125.

  In the power transmission system 1 according to this embodiment, the power transmission side antenna 111, the power transmission side impedance adjustment unit 119, the power reception side antenna 121, the power reception side impedance adjustment unit 129, and the good conductor medium 13 are resonated with the combined impedance of each impedance, The power input to the side antenna 121 can be maximized. Further, the power transmission side inclusion portion 117 and the power reception side inclusion portion 127 have an effect of suppressing the spread of the electric field into the good conductor medium 13 and thereby suppressing the electromagnetic energy that diffuses and disappears in the good conductor medium 13.

FIG. 7 is a diagram illustrating an electric field vector and a magnetic field vector in the power transmission system 1 according to the first embodiment.
FIG. 8 is a diagram showing a pointing vector (energy flow) generated based on the electric field vector and the magnetic field vector in the power transmission system 1 according to the first embodiment.
Here, FIG. 7 is a diagram schematically showing a simulation result of an electric field and a magnetic field generated between the power transmission side antenna 111 and the power reception side antenna 121 during power transmission. As shown in FIG. 7, in the power transmission system 1 of the present embodiment, the power transmission side inclusion unit 117 and the power reception side inclusion unit 127 suppress the expansion of the electric field into the good conductor medium 13 and flow to the predetermined good conductor medium 13 and the coil. The magnetic field generated by the current generates an eddy current in the good conductor medium 13, and the eddy current repeatedly creates a new magnetic field, whereby the electric field and the magnetic field can be made substantially parallel to the coil surface. As a result, as shown in FIG. 8, a pointing vector (electromagnetic energy flow) from the power transmission side antenna 111 to the power reception side antenna 121 can be generated substantially perpendicularly to the coil surface.

  As described above, the power transmission system 1 according to the present embodiment suppresses electromagnetic energy that diffuses and disappears in a good conductor medium even when the power transmitting device 11 and the power receiving device 12 are relatively far apart, and as a result. , Wireless power transmission in a good conductor medium such as seawater makes it possible to extend the distance, and to stably supply power to the seabed, soil in the seabed, or sensors installed in seawater Is possible.

<Second Embodiment>
Next, the electric power transmission system 2 by 2nd embodiment of this invention is demonstrated with reference to drawings.
FIG. 9 is a diagram showing an outline of the power transmission system 2 according to the second embodiment of the present invention.
The power transmission system in the present embodiment includes a power source 151 that is driven in seawater or on the sea, and a sensor 141. The power source 15 is provided with a power transmission device 21. In addition, a power receiving device 22 is connected to the sensor 14.

FIG. 10 is a diagram showing a configuration of the power transmission system 2 according to the second embodiment of the present invention.
Next, the power transmission system 2 according to the embodiment will be described with reference to the drawings.
In this figure, the power transmission system 2 includes a power transmission device 21 and a power reception device 22. The power transmission device 21 includes a power transmission side antenna 211, a power transmission side power transmission circuit 212, and a power transmission side control circuit 214. The power receiving device 22 includes a power receiving antenna 221, a power receiving power transmission circuit 222, and a power receiving control circuit 224. The secondary battery 225 may have. The power transmission side antenna 211 includes a power transmission side coil 216, a first power transmission side inclusion portion 2171 made of a first dielectric covering the power transmission side coil 216, and a second dielectric covering the first power transmission side inclusion portion 2171. The 2nd power transmission side inclusion part 2172 which comprises is provided. Similarly to the power transmission side antenna 211, the power reception side antenna 221 includes a power reception side coil 226, a first power reception side inclusion portion 2271, and a second power reception side inclusion portion 2272. The power transmission side antenna 211 and the power reception side antenna 221 are covered with the good conductor medium 23.
In the present embodiment, the first power transmission side inclusion unit and the first power reception side inclusion unit are collectively referred to as a first inclusion unit, and the second power transmission side inclusion unit and the second power reception side inclusion unit are collectively referred to as a second. The inclusion part.

  The first power transmission side inclusion portion 2171, the second power transmission side inclusion portion 2172, the first power reception side inclusion portion 2271, and the second power reception side inclusion portion 2272 are, for example, specific dielectrics such as polyethylene, polyimide, polyamide, fluororesin, and acrylic. It is composed of a dielectric having a ratio of about 2 to 10 and a dielectric loss tangent of 0.01 or less.

  Further, in the power transmission system 2 of the present embodiment, the relative dielectric constant of the first dielectric constituting the first power transmission side inclusion portion 2171 and the relative dielectric constant of the second dielectric constituting the second power transmission side inclusion portion 2172. May be different or the same. In addition, the dielectric loss tangent of the first dielectric constituting the first power transmission side inclusion portion 2171 and the dielectric loss tangent of the second dielectric constituting the second power transmission side inclusion portion 2172 may be different or the same. Also good. The same applies to the first dielectric constituting the first power receiving side inclusion portion 2271 and the second dielectric constituting the second power receiving side inclusion portion 2272.

Further, in FIG. 10 showing the configuration of the power transmission system 2, both the power transmission side antenna 211 and the power reception side antenna 221 are described as a structure having a first inclusion part and a second inclusion part. Only one of the power transmission side antenna 211 and the power reception side antenna 221 may have a structure including a first inclusion part and a second inclusion part.
Note that the power transmission system 2 of the present embodiment may also include the impedance adjustment unit described in the first embodiment.

  Here, in the power transmission system 2 of the present embodiment, when the dielectric loss tangent of each dielectric constituting the first power transmission side inclusion unit 2171 and the second power transmission side inclusion unit 2172 satisfies a predetermined condition, higher power Transmission efficiency can be obtained.

FIG. 11 is a diagram showing the influence of the ratio of the dielectric loss tangent of the first dielectric and the dielectric loss tangent of the second dielectric on the power transmission efficiency.
FIG. 11 shows that higher power transmission efficiency can be obtained by making the dielectric loss tangent of the second dielectric larger than that of the first dielectric. This is because the second dielectric constituting the second power transmission side inclusion part 2172 (second power reception side inclusion part 2272) has the effect of suppressing the expansion of the electric field to the good conductor medium 23, and the first power transmission side inclusion part. Based on the effect that the dielectric loss in the vicinity of the power transmission side coil 216 (power reception side coil 226) can be reduced by reducing the dielectric loss tangent of the first dielectric constituting 2171 (first power reception side inclusion portion 2271). It is.

  Further, in the power transmission system 2 of the present embodiment, even when the dielectric constants of the dielectrics constituting the first power transmission side inclusion unit 2171 and the second power transmission side inclusion unit 2172 satisfy a predetermined condition, even higher power Transmission efficiency can be obtained.

FIG. 12 is a diagram illustrating the influence of the relative permittivity of the first dielectric and the relative permittivity of the second dielectric on the power transmission efficiency.
FIG. 12 shows that higher power transmission efficiency can be obtained by making the relative permittivity of the second dielectric larger than the relative permittivity of the first dielectric.

Next, a specific operation of the power transmission system 2 according to this embodiment will be described in order.
First, the power source 151 that is driven in seawater on which the power transmission device 21 is mounted approaches the power reception device 22 connected to the sensor 24. Next, in the power transmission side power transmission circuit 212, an AC power source (not shown) outputs AC power at a predetermined frequency. Next, the output AC power is supplied to the power transmission side coil 216 via the power transmission side impedance adjustment unit 219 in the power transmission side power transmission circuit 212, and the power transmission side antenna 211 uses the AC power as electromagnetic energy. Send to the outside (good conductor medium 23). Next, the power receiving device 22 receives the transmitted electromagnetic energy at the power receiving antenna 221. Here, the power transmission side impedance adjustment unit 219 and the power reception side impedance adjustment unit 229 are adjusted so that the combined impedance of each impedance of the power transmission side antenna 211, the power reception side antenna 221, and the good conductor medium 23 resonates at the frequency of the transmission power. ing. The power received by the power receiving side coil 226 via the power receiving side antenna 221, the power receiving side impedance adjusting unit 229 in the power receiving side power transmission circuit 222, and a converter (not shown) in the power receiving side power transmission circuit 222. )). The converter converts the alternating current into direct current, and supplies energy to the sensor 141 to complete power transmission. Part or all of the energy converted from AC to DC by the converter may be supplied to the sensor 141 via the secondary battery 225.

In the power transmission system 2 according to the present embodiment, the power transmission side antenna 211, the power transmission side impedance adjustment unit 219, the power reception side antenna 221, the power reception side impedance adjustment unit 229, and the good conductor medium 23 are resonated with the combined impedances of the respective impedances, The power input to the side antenna 221 can be maximized.
Further, the second power transmission side inclusion portion 2172 and the second power reception side inclusion portion 2272 suppress the spread of the electric field into the good conductor medium 23, thereby suppressing the electromagnetic energy that diffuses and disappears in the good conductor medium 23. is there.
And the 1st power transmission side inclusion part 2171 and the 1st power reception side inclusion part 2271 have the effect of reducing the dielectric loss in the power transmission side coil 216 and the power reception side coil 226 vicinity.

  As described above, the power transmission system 2 according to the present embodiment can obtain higher power transmission efficiency than the power transmission system 1 according to the first embodiment, and is installed in the seabed or the soil on the seabed. It becomes possible to supply electric power more stably to the sensor.

<Third embodiment>
Next, a power transmission system 3 according to a third embodiment of the present invention will be described with reference to the drawings.
FIG. 13 is a diagram showing an outline of the power transmission system 3 according to the third embodiment of the present invention.
The power transmission system in the present embodiment includes a power source 152, a sensor 142, a power transmission device 31, and a power reception device 32 that are driven in seawater or on the sea. The power transmission device 31 is mounted on a power source 152 that is driven in seawater, and the power reception device 32 is connected to the sensor 142.

FIG. 14 is a diagram showing a configuration of the power transmission system 3 according to the third embodiment of the present invention.
Next, the power transmission system 3 according to the embodiment will be described with reference to the drawings.
In FIG. 14, the power transmission system 3 includes a power transmission device 31 and a power reception device 32. The power transmission device 31 includes a power transmission side antenna 311, a power transmission side power transmission circuit 312, and a power transmission side control circuit 314. The power receiving device 32 includes a power receiving side antenna 321, a power receiving side power transmission circuit 322, and a power receiving side control circuit 324. The secondary battery 325 may have. The power transmission side antenna 311 includes a power transmission side lower coil 3161, a power transmission side upper coil 3162, a first power transmission side inclusion 3171 made of a first dielectric covering the power transmission side lower coil 3161 and the power transmission side upper coil 3162, and a first power transmission. A second power transmission side inclusion portion 3172 made of a second dielectric covering the side inclusion portion 3171 is provided. The power receiving side antenna 321 includes a power receiving side lower coil 3261, a power receiving side upper coil 3262, a power receiving side lower coil 3261 and a power receiving side upper coil 3262, a first power receiving side inclusion portion 3271 made of a first dielectric, and a first power receiving side. A second power receiving side covering portion 3272 made of a second dielectric covering the side including portion 3271 is provided. The power transmission side antenna 311 and the power reception side antenna 321 are covered with a good conductor medium 33.
In the present embodiment, the second power transmission side inclusion portion and the second power reception side inclusion portion are collectively referred to as a covering portion.

  The first power transmission side inclusion part 3171, the second power transmission side inclusion part 3172, the first power reception side inclusion part 3271 and the second power reception side inclusion part 3272 are, for example, specific dielectrics such as polyethylene, polyimide, polyamide, fluororesin, and acrylic. It is composed of a dielectric having a ratio of about 2 to 10 and a dielectric loss tangent of 0.01 or less.

  Further, either one or both of the power transmission side lower coil 3161 or the power transmission side upper coil 3162 may be included in both the first power transmission side inclusion unit 3171 and the second power transmission side inclusion unit 3172. Similarly, either one or both of the power reception side lower coil 3261 and the power reception side upper coil 3262 may be included in both the first power reception side inclusion portion 3271 and the second power reception side inclusion portion 3272.

  Also, alternating current signals with different positive and negative are applied to the power transmission side lower coil 3161 and the power transmission side upper coil 3162. Similarly, positive and negative AC signals are applied to the power receiving side lower coil 3261 and the power receiving side upper coil 3262.

FIG. 15 is a diagram illustrating another configuration of the power transmission side antenna according to the third embodiment of the present invention.
As shown in this figure, in the power transmission side antenna, either one or both of the power transmission side lower coil 3161 and the power transmission side upper coil 3162 may be included only in the second power transmission side inclusion portion 3172. . Similarly, in the power receiving side antenna, either one or both of the power receiving side lower coil 3261 and the power receiving side upper coil 3262 may be included only in the second power receiving side inclusion portion 3272.

  Further, in the power transmission system 3 of the present embodiment, the relative dielectric constant of the first dielectric constituting the first power transmission side inclusion 3171 and the relative dielectric constant of the second dielectric constituting the second power transmission side inclusion 3172. May be different from each other or the same. Further, the dielectric loss tangent of the first dielectric constituting the first power transmission side inclusion 3171 and the dielectric loss tangent of the second dielectric constituting the second power transmission side inclusion 3172 may be different from each other, It may be the same. The same applies to the first dielectric constituting the first power receiving side inclusion portion 3271 and the second dielectric constituting the second power receiving side inclusion portion 3272.

Further, in FIG. 14 showing the configuration of the power transmission system 3, both the power transmission side antenna 311 and the power reception side antenna 321 are described as a structure having the first inclusion part and the second inclusion part described above. In the present embodiment, only one of the power transmission side antenna 311 and the power reception side antenna 321 may have a structure including a first inclusion part and a second inclusion part.
Note that the power transmission system 3 according to the present embodiment may also include the impedance adjustment unit described in the first embodiment.

  As illustrated in this configuration, by dividing the power transmission side coil or the power reception side coil, the capacitance components (C1, C2) of the coil are further increased, and the electric field spreads in the good conductor medium by the second dielectric. The effect of suppressing is increased.

Next, a specific operation of the power transmission system 3 according to the present embodiment will be described in order.
First, the power source 152 that is driven in seawater on which the power transmission device 31 is mounted approaches the power reception device 32 connected to the sensor 142. Next, in the power transmission side power transmission circuit 312, an AC power source (not shown) outputs AC power at a predetermined frequency. Next, the output AC power is supplied to the power transmission side coil 316 via the power transmission side impedance adjustment unit 319 in the power transmission side power transmission circuit 312, and the power transmission side antenna 311 uses the AC power as electromagnetic energy. Sending to the outside (good conductor medium 33). Next, the power receiving device 32 receives the transmitted electromagnetic energy at the power receiving antenna 321. Here, the power transmission side impedance adjustment unit 319 and the power reception side impedance adjustment unit 329 are adjusted so that the combined impedances of the power transmission side antenna 311, the power reception side antenna 321 and the good conductor medium 33 resonate at the frequency of the transmission power. ing. The power received by the power receiving side coil 326 via the power receiving side antenna 321 is converted into a power receiving side impedance adjusting unit 329 in the power receiving side power transmission circuit 322 and a converter in the power receiving side power transmission circuit 322 (not shown). Flow into. The power is supplied to the sensor 141 and power transmission is completed. Part or all of the energy converted from AC to DC by the converter may be supplied to the sensor 142 via the secondary battery 325.

In the power transmission system 3 according to the present embodiment, the power is transmitted to the power receiving side lower coil 3261 and the power receiving side upper coil 3262 by resonating with the combined impedance of the power transmitting side antenna 311, the power receiving side antenna 321, and the good conductor medium 33. The power can be maximized.
Further, the second power transmission side inclusion portion 3172 and the second power reception side inclusion portion 3272 suppress the spread of the electric field into the good conductor medium 33, thereby suppressing the electromagnetic energy that diffuses and disappears in the good conductor medium 33. is there.
And the 1st power transmission side inclusion part 3171 and the 1st power reception side inclusion part 3271 are the capacity | capacitance components of a coil, the capacitance component between the power transmission side lower coil 3161 and the power transmission side upper coil 3162, and the power transmission side lower coil 3161. There is an effect of reducing the dielectric loss in the vicinity of the coil while increasing the capacitance component between the power transmission side upper coil 3162 and the coil.

  As described above, the power transmission system 3 according to the present embodiment can achieve higher power transmission efficiency than the power transmission system 1 according to the first embodiment and the power transmission system 2 according to the second embodiment. Or it becomes possible to supply electric power more stably to the sensor installed in the seabed soil or in the seawater.

<Fourth embodiment>
FIG. 16 is a diagram showing a configuration of the power transmission system 4 according to the fourth embodiment of the present invention.
As shown in this figure, the power transmission device 11 of the power transmission system 4 according to the fourth embodiment of the present invention is provided in the submersible 153, and the power receiving device 12 is provided in the sensor 143. The power receiving device 12 and the sensor 143 are installed on the seabed. Specifically, the power receiving device 12 and the sensor 143 are placed on the soil on the seabed. Therefore, the power receiving device 12 and the sensor 143 are not buried in the seabed soil.

FIG. 17 is a diagram illustrating an example of a flowchart of the power transmission system 4 according to the fourth embodiment of the present invention.
For example, the submersible 153 approaches the sensor 143 using the flowchart shown in FIG. After approaching the sensor, the power transmission to the sensor 143 is completed using the power transmission system and the power transmission method described in the first embodiment.
By using the present invention, it is possible to stably supply power even when a tide occurs and the positional relationship between the sensor 143 and the submersible 153 changes.
In addition, the submersible 153 provided with the power transmission apparatus 11 may be a power supply source or the like laid on a ship or the seabed.
In addition, the sensor 143 may have a function of detecting an oil leak, or any one of a function of measuring tidal current and water pressure, a function of detecting approach of an object, a communication function, an intermittent operation function, and a control function. Or a combination of these functions.

<Fifth embodiment>
FIG. 18 is a diagram showing a configuration of the power transmission system 5 according to the fifth embodiment of the present invention.
As shown in this figure, the power receiving device 12 and the sensor 143 of the power transmission system 5 according to the fifth embodiment of the present invention are embedded in the seabed soil. That is, the power receiving device 12 and the sensor 143 of the power transmission system 5 are all buried in the seabed soil.
The power transmission system 5 can detect the leakage of oil diffusing into the soil by embedding the sensor 143 in the soil on the seabed.

<Sixth embodiment>
FIG. 19 is a diagram showing a configuration of the power transmission system 6 according to the sixth embodiment of the present invention.
As shown in this figure, the sensor 143 of the power transmission system 6 according to the sixth embodiment of the present invention is embedded in the seabed soil, and part or all of the power receiving device 12 is exposed in seawater. .
The sensor 143 of the power transmission system 6 is buried in the soil at the bottom of the sea, and part or all of the power receiving device 12 is exposed in the sea water, so that it is possible to detect oil leakage or the like that diffuses into the soil. In addition, since it is not necessary to supply power to the power receiving apparatus 12 over the seabed, the efficiency of power supply to the power receiving apparatus 12 can be increased.

<Seventh embodiment>
FIG. 20 is a diagram showing the configuration of the power transmission system 7 according to the seventh embodiment of the present invention.
As shown in this figure, the power receiving device 12 and the sensor 143 of the power transmission system 7 according to the seventh embodiment of the present invention are embedded in the seabed soil, and the surface thereof is exposed in seawater. . That is, the power receiving device 12 and the sensor 143 are installed in a concave depression formed on the seabed, and the surface thereof is not covered with soil.
Since the power receiving device 12 and the sensor 143 are embedded in the soil on the seabed and a part thereof is in contact with the seawater, it is possible to detect the leakage of oil diffusing into the soil, and It is not necessary to supply power to the power receiving device 12 over the earth, and it becomes easy to detect the power receiving device 12 and the sensor 143 using means such as an outboard camera, and the efficiency of power supply to the power receiving device 12 is improved. And the access to the power receiving device 12 for supplying power is facilitated.

<Eighth embodiment>
FIG. 21 is a diagram showing the configuration of the power transmission system 8 according to the eighth embodiment of the present invention.
As shown in this figure, the power receiving device 12 and the sensor 143 of the power transmission system 8 according to the eighth embodiment of the present invention are placed in seawater. The power receiving device 12 and the sensor 143 may be placed in seawater by means of adjusting buoyancy, such as ballast, or may be placed in seawater using a string or the like.
Since the power receiving device 12 and the sensor 143 are placed in seawater, it is possible to detect a change in water quality due to oil leakage or the like even at a location away from the seabed.
<Ninth Embodiment>
FIG. 39 is a diagram showing the configuration of the power transmission system 9 according to the ninth embodiment of the present invention.
As shown in this figure, in the power transmission system 9 according to the ninth embodiment, the power transmission device 11 is provided at the connection portion of the power cable 18, and the power reception device 12 is provided at the connection portion of the power cable 19. By using the technology of the present invention, it is possible to connect power cables in a non-contact manner by supplying power wirelessly even in seawater (good conductor medium 13). It is easy to use and improves reliability without wear.

  Further, the power supply cable 18 and the power supply cable 19 can supply power in both directions by using the power transmission device 11 as a power reception device and the power reception device 12 as a power transmission device. The power cable 18 and the power cable 19 may include both the power transmission device 11 and the power reception device 12. Furthermore, since the power transmitting device 11 and the power receiving device 12 have a function of wirelessly communicating information, there is no need to provide a separate mechanism for wireless communication, and a small size and low power can be achieved by using a common mechanism for power transmission. It can be a cost system.

FIG. 22 is a diagram showing a simulation model for demonstrating the effect of the power transmission system 1 according to the first embodiment of the present invention.
Next, a simulation that demonstrates the effect of the power transmission system 1 according to the first embodiment using the simulation model of FIG. 22 will be described.
The power transmission system 1 according to the first embodiment includes a power transmission device 41 and a power reception device 42 as shown in this figure. The power transmission device 41 and the power reception device 42 are covered with seawater 43 as a good conductor medium. The power transmission device 41 includes a power transmission side antenna 411, and the power transmission side antenna 411 includes a power transmission side coil 416 and a first power transmission side inclusion unit 417. The power receiving device 42 includes a power receiving side antenna 421, and the power receiving side antenna 421 includes a power receiving side coil 426 and a first power receiving side inclusion portion 427. The power transmission side coil 416 and the power reception side coil 426 are spiral coils.

FIG. 23 is a schematic top view of the power transmission device 41 according to the first embodiment of the present invention.
As shown in this figure, the power transmission side coil 416 has a structure in which two single-layer spiral coils each having 29 turns of a conductor wire having a diameter of 2 mm and an outer diameter of 220 mm and an inner diameter of 100 mm are opposed to each other with a distance of 3 mm. The power supply port is a power application terminal for generating an electric field in the coil. AC power is applied from the feed port to the opposed helical coils. The internal dielectric 417 is made of a fluororesin, and the covering dielectric 41 is made of acrylic. The size of the covering dielectric 41 is 255 mm in length, 255 mm in width, and 19 mm in height. The resonance frequency of the power transmission system 1 is about 1 MHz. Here, in this embodiment, even when the ratio (d1 / d2) of the outer coil size d2 to the coated dielectric size d1 (d1 / d2) is 1.16, which is larger than 1, sufficiently high power transmission efficiency is obtained. Has been obtained. However, if the ratio (d1 / d2) is larger than 1.16, higher power transmission efficiency can be obtained.
The power receiving device 42 has the same configuration as the power transmitting device 41. However, the configuration shown here is an example, and the same effect can be obtained even if the power transmission device 41 and the power reception device 42 are not the same configuration.

FIG. 24 is a diagram showing a simulation result of power transmission efficiency in Example 1 of the present invention.
The distance d between the power transmission device 41 and the power reception device 42 was 10 cm, and power transmission efficiency was simulated in seawater. As a result, the power transmission efficiency was a high value of 40% or more when the frequency f of the transmission power was around 1 MHz, as shown in FIG.

FIG. 25 is a diagram illustrating an electric field in the vicinity of the power transmission device 41 and the power reception device 42 in the three-dimensional electromagnetic field simulation according to the first embodiment of the present invention.
FIG. 26 is a diagram illustrating a magnetic field in the vicinity of the power transmission device 41 and the power reception device 42 in the three-dimensional electromagnetic field simulation according to the first embodiment of the present invention.
FIG. 27 is a diagram illustrating pointing vectors in the vicinity of the power transmission device 41 and the power reception device 42 in the three-dimensional electromagnetic field simulation according to the first embodiment of the present invention.
As shown in FIG. 25, the electric fields in the vicinity of the power transmission device 41 and the power reception device 42 in the three-dimensional electromagnetic field simulation of the first embodiment rotate along a plane parallel to the coil surface. Further, as shown in FIG. 26, the magnetic field is generated radially along a plane parallel to the coil surface. The pointing vector (energy flow) is generated in a direction substantially perpendicular to the coil surface, as shown in FIG. 27, based on such electric field and magnetic field flows. As a result, even in the seawater where the distance between the power transmitting device 41 and the power receiving device 42 is about 10 cm, an energy flow is formed in a direction substantially perpendicular to the coil surface, and the distance in the seawater is increased. It becomes possible.

FIG. 28 is a diagram illustrating a pointing vector simulation result when the medium used in the power transmission system 1 according to the first embodiment of the present invention is changed from seawater to the atmosphere.
This figure has shown the simulation result of the pointing vector when the power transmission apparatus 41 and the power receiving apparatus 42 of the electric power transmission system 1 by a present Example are separated 10 cm in air | atmosphere.
As can be seen from this figure, when the medium used in the power transmission system 1 according to the first embodiment is changed from seawater to the atmosphere, no energy flow perpendicular to the power transmission / reception device surface occurs, and the energy draws a spiral. It has become a trend. That is, the phenomenon in which energy flow substantially perpendicular to the coil surface is a phenomenon peculiar to energy propagating in a good conductor medium, and is a phenomenon that does not occur when propagating in the atmosphere. The present invention utilizes the phenomenon that an energy flow substantially perpendicular to the coil surface specific to energy propagating in a good conductor medium occurs.

FIG. 29 is a diagram illustrating a simulation result of a pointing vector in the atmosphere when the related magnetic field resonance technique is used.
As can be seen from this figure, even when the related magnetic field resonance technique is used, the flow of energy perpendicular to the coil surface does not occur as in FIG. 29, and the energy flows in a spiral pattern. However, the power transmission efficiency in this case is 90%. As already described, high power transmission efficiency cannot be obtained even if wireless power transmission is attempted in seawater using a power transmission system based on this related technology. It was found that only about% power transmission efficiency can be obtained.

The magnetic field under the phase condition in which the interlinkage magnetic flux passing through the power receiving device 42 of the power transmitting side coil 416 and the power receiving side coil 426 is maximum is the power transmitting device 41 in the three-dimensional electromagnetic field simulation of this embodiment shown in FIG. And the same magnetic field in the vicinity of the power receiving device 42.
The physical differences between the related magnetic field resonance technology and the power transmission system 1 according to this embodiment will be described below.
In the power transmission system 1 according to the present embodiment, as illustrated in FIG. 26, the linkage flux passing through the power transmission side coil 416 of the power transmission device 41 and the linkage flux passing through the power reception side coil 426 of the power reception device 42 are opposite to each other. The magnetic field is maximized by generating the magnetic field parallel to the coil surface.
On the other hand, in the related wireless power transmission technology using magnetic field resonance, the resonance frequency is divided into two when tightly coupled, and the linkage between the power transmission device 41 and the power reception device 42 at the higher resonance frequency. It is generally known that the phase of magnetic flux is reversed. In the same technology, it is generally known that the phase of the interlinkage magnetic flux passing through the coils of the power transmission device 41 and the power reception device 42 is in phase in a loosely coupled state where the resonance frequency is not divided.
In the present invention, the phase of the interlinkage magnetic flux penetrating the power transmission side coil 416 of the power transmission device 41 and the power reception side coil 426 of the power reception device 42 is not in a tightly coupled state but in a loosely coupled state where the resonance frequency is not divided. This is an essential difference from the related magnetic resonance technology.

FIG. 30 is a diagram illustrating a result of an actual experiment in seawater of the effect of the power transmission system 1 according to the first embodiment of the present invention.
The distance d between the power transmission device 41 and the power reception device 42 is 10 cm. When power feeding is performed at a low frequency (about 1 MHz), the power transmission efficiency becomes a high value of 30% or more, and from a submarine to the seabed, the seabed soil, or the sensor installed in the seawater Power can be stably supplied.

FIG. 31 is a diagram showing a simulation model for demonstrating the effect of the power transmission system 5 according to the third embodiment of the present invention.
Next, a simulation that demonstrates the effect of the power transmission system 5 according to the third embodiment using the simulation model of FIG. 31 will be described.
The power transmission system 5 according to the third embodiment includes a power transmission device 51 and a power reception device 52 as shown in this figure. The power transmission device 51 and the power reception device 52 are covered with a good conductor medium 53. The power transmission device 51 includes a power transmission antenna 511. The power transmission side antenna 511 includes a power transmission side lower coil 5161, a power transmission side upper coil 5162, a first power transmission side inclusion portion 5171 made of a first dielectric covering them, and a second power transmission side inclusion portion 5171 that covers the first power transmission side inclusion portion 5171. A second power transmission side inclusion portion 5172 made of a dielectric is provided. In addition, the power receiving device 52 includes a power receiving antenna 521. The power reception side antenna 521 includes a power reception side lower coil 5261 and a power reception side upper coil 5262, a first power reception side inclusion portion 5271 made of a first dielectric covering them, and a second power reception side inclusion portion 5271. A second power receiving side inclusion portion 5272 made of a dielectric is provided.

  Here, as shown in FIG. 31, the simulation model in the present embodiment has a structure in which the second power transmission side inclusion portion 5172 covers only the upper and lower surfaces (surface parallel to the coil surface) of the first power transmission side inclusion portion 5171. It has become. That is, the first power transmission side inclusion unit 5171 has a structure sandwiched between two second power transmission side inclusion units 5172. On the other hand, the side surface (surface perpendicular to the coil surface) of the first power transmission side inclusion portion 5171 is directly covered by the power transmission device 51. Further, the simulation model in the present embodiment has a structure in which the second power receiving side inclusion portion 5272 covers only the upper and lower surfaces of the first power receiving side inclusion portion 5271. That is, the first power receiving side inclusion portion 5271 has a structure sandwiched between two second power reception side inclusion portions 5272. On the other hand, the side surface of the first power receiving side inclusion portion 5271 is directly covered by the power receiving device 52.

FIG. 32 is a schematic side view of the power transmission device 51 according to the second embodiment of the present invention.
The 1st power transmission side inclusion part 5171 is comprised with the fluororesin of length 250mm, width 250mm, and height 0.5mm. The relative dielectric constant is 6.2 and the dielectric loss tangent is 0.0019.
Moreover, the 2nd power transmission side inclusion part 5172 is comprised using two fluororesins with one 250 mm long, 250 mm wide, and height 2.5mm. The relative dielectric constant is 10.2 and the dielectric loss tangent is 0.0024.
The power transmission device 51 is made of acrylic having a length of 260 mm, a width of 260 mm, a height of 26.5 mm, and a thickness of 5 mm. The relative permittivity of acrylic is 3.3, and the dielectric loss tangent is 0.04.
In the present embodiment, the power receiving device 52 also performs a simulation with the same configuration as the power transmitting device 51 described above.

FIG. 33 is a diagram of the power transmission side lower coil 5161 of the power transmission device 51 according to the second embodiment of the present invention as viewed from the power reception unit side.
Moreover, FIG. 34 is the figure which looked at the power transmission side upper coil 5162 of the power transmission apparatus 51 in Example 2 of this invention from the power receiving part side.
The lower coil 5161 on the power transmission side is a spiral coil composed of wiring composed of a conductor of 50 turns with an outer periphery of 208 mm. The power transmission side lower coil 5161 has a wiring diameter of 1 mm and a wiring interval of 1 mm.
The power transmission side upper coil 5162 has the same size as the power transmission side lower coil 5161. In addition, the power transmission side lower coil 5161 and the power transmission side upper coil 5162 are arranged at a distance of 0.5 mm. Further, the outermost end of the power transmission side lower coil 5161 and the outermost end of the power transmission side upper coil 5162 serve as a power supply port for high frequency power. The direction of the spiral of the power transmission side lower coil 5161 and the direction of the spiral of the power transmission side upper coil 5162 are configured such that a magnetic field is generated in the same direction via the power feeding port.

FIG. 35 is a view of the power reception side lower coil 5261 of the power reception device 52 according to the second embodiment of the present invention as viewed from the power transmission unit side.
FIG. 36 is a view of the power reception side upper coil 5262 of the power reception device 52 according to the second embodiment of the present invention as viewed from the power transmission side.
The power-receiving-side lower coil 5261 is a spiral coil that is composed of wiring composed of a conductor of 50 turns and an outer periphery of 208 mm. The power receiving side lower coil 5261 has a wiring diameter of 1 mm and a wiring interval of 1 mm.
The power receiving side upper coil 5262 has the same size as the power receiving side lower coil 5261. Further, the power receiving side lower coil 5261 and the power receiving side upper coil 5262 are arranged with a distance of 0.5 mm. Further, the outermost end portion of the power receiving side lower coil 5261 and the outermost end portion of the power receiving side upper coil 5262 serve as a power receiving port for high frequency power. The direction of the spiral of the power receiving side lower coil 5261 and the direction of the spiral of the power receiving side upper coil 5262 are configured so that a magnetic field is generated in the same direction via the power receiving port.

FIG. 37 is a diagram showing a simulation result of power transmission efficiency in Example 2 of the present invention.
When the power transmission device 51 and the power reception device 52 are separated from each other by 10 cm in seawater, the simulation result of the power transmission efficiency is a high value of 72% or more as shown in this figure. The resonance frequency is about 140 kHz.
The configuration of the power receiving device 52 in the present embodiment is the same as that of the power transmitting device 51. However, the configuration shown here is an example, and the power transmission device 51 and the power reception device 52 do not necessarily have the same configuration.

  As shown in the simulation according to the present embodiment, by configuring a plurality of dielectrics covering the coil, it is possible to reduce the frequency without increasing the loss in the dielectric, and high power transmission efficiency. Is obtained. As a result, it is possible to stably supply power from the submersible craft to the seabed, the soil on the seabed, or the sensor installed in the seawater.

FIG. 40 is a diagram illustrating a minimum configuration of the power transmission device 11 according to the present invention.
As shown in FIG. 40, the power transmission device 11 of the present invention includes at least a power transmission side antenna 111 and a power transmission side power transmission circuit 112.

FIG. 41 is a diagram showing a minimum configuration of the power receiving device 12 of the present invention.
As shown in FIG. 41, the power receiving device 12 of the present invention includes at least a power receiving antenna 121 and a power receiving power transmission circuit 122.

  Moreover, although a part or all of said embodiment can be described also for the following additional remarks, it is not restricted to the following.

(Supplementary note 1) A power transmission system that includes a power transmission device, a power reception device, and a sensor and wirelessly transmits power in a good conductor medium,
The power transmission device is:
A power transmission side antenna comprising a power transmission side coil and a power transmission side inclusion portion having a dielectric covering the power transmission side coil;
Via the power transmission side antenna of the power transmission device, the impedance of the good conductor medium, the impedance adjustment of the variable capacitance and variable inductor of the power transmission side antenna of the power transmission device, the variable capacitance and variable inductor of the power reception side antenna of the power reception device, A power transmission circuit on the power transmission side that outputs power at a resonance frequency determined by the impedance adjustment of
With
The power receiving device is:
A power receiving side antenna comprising a power receiving side coil and a power receiving side inclusion portion having a dielectric covering the power receiving side coil;
A power receiving side power transmission circuit for inputting power output from the power transmission device;
With
The sensor is
A power transmission system connected to the power receiving device and receiving power.
(Supplementary note 2)
The combined capacitance component of the capacitance component (C1 [pF]) constituting the impedance of the power transmission side antenna and the capacitance component (C1 ′ [pF]) of the power transmission side power transmission circuit is C10, and the impedance of the power reception side antenna is 30> C3 × d ÷ (C10 + C20)> 0, where C20 is a combined capacitance component of the capacitance component (C2 [pF]) and the capacitance component (C2 ′ [pF]) of the power receiving side power transmission circuit. The power transmission system according to appendix 1, further comprising: an impedance adjustment unit that adjusts the impedance so as to satisfy the relationship .5.
(Supplementary note 3)
The combined capacitance component of the capacitance component (C1 [pF]) constituting the impedance of the power transmission side antenna and the capacitance component (C1 ′ [pF]) of the power transmission side power transmission circuit is C10, and the impedance of the power reception side antenna is 30> C3 × d ÷ (C10 + C20)> 0, where C20 is a combined capacitance component of the capacitance component (C2 [pF]) and the capacitance component (C2 ′ [pF]) of the power receiving side power transmission circuit. The power transmission system according to appendix 1 or appendix 2, further comprising: an impedance adjuster that adjusts the impedance so as to satisfy the relationship .5.
(Additional remark 4) The magnitude | size (d1 [cm]) of the direction along the coil surface of the said power transmission side inclusion part, the outer diameter (d2 [cm]) of the said power transmission side inclusion part, and the coil surface of the said power reception side inclusion part Either or both of the size in the direction (d1 [cm]) and the outer diameter (d2 [cm]) of the power receiving coil satisfy the relationship of ratio (d1 / d2)> 1.2. The power transmission system according to Supplementary Note 1 or Supplementary Note 3.
(Appendix 5) The power transmission side inclusion section is
A first power transmission side inclusion portion having a first dielectric covering the power transmission side coil;
A second power transmission side inclusion section having a second dielectric covering the first power transmission side inclusion section;
With
The power receiving side inclusion section is
A first power receiving side inclusion portion having a first dielectric covering the power receiving side coil;
A second power receiving side inclusion having a second dielectric covering the first power receiving side inclusion;
The power transmission system according to any one of appendix 1 to appendix 4, further comprising:
(Appendix 6) The power transmission side inclusion section is
A covering dielectric having a dielectric covering the second power transmission side inclusion;
The power receiving side inclusion section is
A covering dielectric having a dielectric covering the second power receiving side inclusion;
The power transmission system according to appendix 5, wherein
(Supplementary note 7) The power transmission system according to supplementary note 5 or 6, wherein the second dielectric is made of a dielectric having a specific gravity equal to that of the good conductor medium.
(Supplementary note 8) The electric power according to any one of supplementary notes 5 to 7, wherein a dielectric loss tangent of the first dielectric is lower than or equal to a dielectric loss tangent of the second dielectric. Transmission system.
(Supplementary note 9) The dielectric constant of the first dielectric is lower than or equal to the dielectric constant of the second dielectric. Any one of Supplementary notes 5 to 8, characterized in that Power transmission system.
(Appendix 10) The good conductor medium is
The power transmission system according to any one of appendix 1 to appendix 9, wherein the electrical conductivity is higher than 1 × 10 ⁻⁴ and the relative dielectric constant is higher than 1.
(Supplementary note 11) The power transmission system according to any one of Supplementary note 1 to Supplementary note 10, further comprising a phase shifter that performs the impedance adjustment.
(Additional remark 12) The said phase shifter is comprised using the operational amplifier. The electric power transmission system of Additional remark 11 characterized by the above-mentioned.
(Supplementary note 13) The power transmission system according to any one of supplementary notes 1 to 12, wherein the good conductor medium is any one of seawater, rivers, fresh water, tap water, soil, and concrete.
(Supplementary Note 14) A part or all of the electric field generated in the good conductor medium is rotated substantially parallel to the power transmission side coil surface of the power transmission device or the power reception side coil surface of the power reception device, and From the appendix 1, wherein a part or all of the magnetic field generated in the good conductor medium is substantially parallel to a power transmission side coil surface of the power transmission device or a power reception side coil surface of the power reception device. The power transmission system according to any one of appendix 13.
(Supplementary Note 15) The power transmission device mounted in seawater, the ship or the submersible is mounted with the power transmission device, the sensor installed in seawater, the ship or the submersible is mounted with the power receiving device, and the power receiving device receives the power The power transmission system according to any one of Supplementary Note 1 to Supplementary Note 14, wherein power is transmitted to the device wirelessly.
(Supplementary Note 16) A power transmission device is provided at a connection portion of one of the two power cables laid in seawater, a power reception device is provided at a connection portion of the other power cable, and wirelessly transmitted from the power transmission device to the power reception device. The power transmission system according to any one of Supplementary Note 1 to Supplementary Note 15, wherein power transmission is performed at
(Supplementary note 17) The power transmission system according to any one of supplementary note 1 to supplementary note 16, wherein the power transmission device communicates with the power reception device via a power transmission side antenna and a power reception side antenna.
(Supplementary Note 18) Capacitance component (C1 [pF]) constituting the impedance of the power transmission side antenna, capacitance component (C2 [pF]) constituting the impedance of the power reception side antenna, the power transmission side antenna, and the power reception side The capacitance component (C3 [pF]) of the capacitance formed by the antenna and the good conductor medium existing between the antenna and the distance (d [cm]) between the power transmission side antenna and the power reception side antenna is 30> C3 The power transmission system according to any one of appendix 1 to appendix 17, characterized by satisfying a relationship of xd / (C1 + C2)> 0.5.
(Supplementary note 19) A power transmission side antenna including a power transmission side coil and a power transmission side inclusion section having a dielectric covering the power transmission side coil;
Via the power transmission side antenna of the own device, the impedance adjustment of the impedance of the good conductor medium, the variable capacitance and variable inductor of the power transmission side antenna of the own device, and the impedance adjustment of the variable capacitance and variable inductor of the power reception side antenna of the power receiving device, A power transmission circuit on the power transmission side that outputs power at a resonance frequency determined by
A power transmission device comprising:
(Supplementary Note 20) A power receiving side antenna including a power receiving side coil and a power receiving side including portion having a dielectric covering the power receiving side coil;
By adjusting the impedance of the good conductor medium, the variable capacitance of the power transmission antenna of the own device and the variable inductor, and the impedance adjustment of the variable capacitance of the power reception antenna of the own device and the variable inductor via the power receiving antenna of the device itself. A power-receiving-side power transmission circuit that inputs power at a fixed resonance frequency;
A power receiving device comprising:
(Supplementary note 21) A power transmission system that includes a power transmission device, a power reception device, and a sensor and wirelessly transmits power in a good conductor medium,
A power transmission side antenna comprising a power transmission side coil and a power transmission side inclusion portion having a dielectric covering the power transmission side coil;
Via the power transmission side antenna of the power transmission device, the impedance of the good conductor medium, the impedance adjustment of the variable capacitance and variable inductor of the power transmission side antenna of the power transmission device, the variable capacitance and variable inductor of the power reception side antenna of the power reception device, A power transmission circuit on the power transmission side that outputs power at a resonance frequency determined by the impedance adjustment of
With
A power receiving side antenna comprising a power receiving side coil and a power receiving side inclusion portion having a dielectric covering the power receiving side coil;
A power receiving side power transmission circuit for inputting power output from the power transmission device;
With
A power transmission method characterized by being connected to the power receiving device and receiving power.
(Additional remark 22) Impedance adjustment of the impedance of a good conductor medium, the variable capacity | capacitance of the said power transmission side antenna, and a variable inductor via the power transmission side antenna which consists of a power transmission side inclusion part which has the dielectric material which covers the power transmission side coil and the said power transmission side coil Power is output at a resonance frequency determined by impedance adjustment of the variable capacitance of the power receiving antenna and the variable inductor.
(Supplementary Note 23) Impedance adjustment of the impedance of the good conductor medium, the variable capacitance of the power transmission side antenna, and the variable inductor via the power reception side antenna including the power reception side coil and the power reception side inclusion portion having a dielectric covering the power reception side coil A power transmission method comprising: inputting power at a resonance frequency determined by a variable capacitor of the power receiving antenna and an impedance adjustment of a variable inductor.

1, 2, 3, 4, 5, 6, 7, 8 ... power transmission systems 11, 21, 31, 51 ... power transmission devices 12, 22, 32, 42, 52 ... power reception devices 13, 23 , 33, 53... Good conductor medium 14, 24, 141, 142, 143... Sensors 15, 151, 152... Power source 18, 19. (Coating dielectric)
42 ... Power receiving device (covered dielectric)
43 ... Seawater 111, 211, 311, 411, 511 ... Power transmission side antennas 112, 212, 312 ... Power transmission side power transmission circuits 114, 214, 314 ... Power transmission side control circuits 116, 216, 316 416 ... power transmission side coil 117 ... power transmission side inclusion parts 119, 219, 319 ... power transmission side impedance adjustment parts 121, 221, 321, 421, 521 ... power reception side antennas 122, 222, 322, ..Receiving side power transmission circuit 124, 224, 324 ... Receiving side control circuit 125, 225, 325 ... Secondary battery 126, 226, 326, 426 ... Receiving side coil 127 ... Receiving side included 129, 229, 329... Power reception side impedance adjustment unit 153... Submersible 417... First power transmission side inclusion (internal dielectric)
427 ... first power receiving side inclusion (internal dielectric)
2171, 3171, 5171 ... first power transmission side inclusions 2172, 3172, 5172 ... second power transmission side inclusions 2271, 3271, 5271 ... first power reception side inclusions 2272, 3272, 5272 ... Second power receiving side inclusions 3161, 5161 ... power transmission side lower coils 3162, 5162 ... power transmission side upper coils 3261, 5261 ... power reception side lower coils 3262, 5262 ... power reception side upper coils

Claims (11)

A power transmission system that includes a power transmission device, a power reception device, and a sensor, and wirelessly transmits power in a good conductor medium that generates an induced current by the magnetic field when a magnetic field is incident,
The power transmission device is:
A power transmission side antenna comprising a power transmission side coil and a power transmission side inclusion portion having a dielectric covering the power transmission side coil;
Through the front Kioku electrostatic antenna, the impedance adjustment of the variable capacitor and the variable inductor of the power receiving antenna impedance adjustment and the power receiving apparatus of the variable capacitance and the variable inductor of the impedance and front Kioku conductive antenna of the good conductor medium A power transmission circuit on the power transmission side that outputs power at a resonance frequency determined by:
The combined capacitance component of the capacitance component (C1 [pF]) constituting the impedance of the power transmission side antenna and the capacitance component (C1 ′ [pF]) of the power transmission side power transmission circuit is C10, and the impedance of the power reception side antenna is A combined capacitance component of the capacitance component (C2 [pF]) to be configured and a capacitance component (C2 ′ [pF]) of the power receiving side power transmission circuit of the power receiving device is C20, and the combined capacitance component C10 and the combined capacitance component C20 30> C3, where C3 is the capacitance component of the capacitance formed by the medium interposed between the power transmission device and the power reception device, and d is the distance between the power transmission side antenna and the power reception side antenna. An impedance adjusting unit that adjusts the impedance so as to satisfy the relationship of xd ÷ (C10 + C20)>0.5;
With
The power receiving device is:
And the power receiving antenna consisting of the power receiving side including portion having a dielectric covering the power receiving coil and the receiver coil,
A power receiving side power transmission circuit for inputting power output from the power transmission device;
With
The sensor is
A power transmission system connected to the power receiving device and receiving power. A power transmission system that includes a power transmission device, a power reception device, and a sensor, and wirelessly transmits power in a good conductor medium that generates an induced current by the magnetic field when a magnetic field is incident,
The power transmission device is:
A power transmission side antenna comprising a power transmission side coil and a power transmission side inclusion portion having a dielectric covering the power transmission side coil;
Resonance determined by the impedance adjustment of the good conductor medium, the variable capacitance and variable inductor of the power transmission antenna, and the impedance adjustment of the variable capacitance and variable inductor of the power receiving antenna of the power receiving device via the power transmission antenna. A power transmission circuit that transmits power at a frequency; and
With
The power receiving device is:
The power receiving side antenna comprising a power receiving side inclusion portion having a power receiving side coil and a dielectric covering the power receiving side coil;
A power receiving side power transmission circuit for inputting power output from the power transmission device;
The combined capacitance component of the capacitance component (C1 [pF]) constituting the impedance of the power transmission side antenna and the capacitance component (C1 ′ [pF]) of the power transmission side power transmission circuit is C10, and the impedance of the power reception side antenna is 30> C3 × d ÷ (C10 + C20)> 0, where C20 is a combined capacitance component of the capacitance component (C2 [pF]) and the capacitance component (C2 ′ [pF]) of the power receiving side power transmission circuit. An impedance adjusting unit that adjusts the impedance so as to satisfy the relationship of .5 ;
Equipped with a,
The sensor is
The power receiving apparatus connected to power transmission systems that, characterized in that you receive power. The size (d1 [cm]) in the direction along the coil surface of the power transmission side inclusion portion, the outer diameter (d2 [cm]) of the power transmission side inclusion portion, and the size in the direction along the coil surface of the power reception side inclusion portion. Either or both of (d1 [cm]) and the outer diameter (d2 [cm]) of the power receiving coil satisfy a relationship of ratio (d1 / d2)> 1.2. The power transmission system according to claim 1 or 2 .   A power transmission system that includes a power transmission device, a power reception device, and a sensor, and wirelessly transmits power in a good conductor medium that generates an induced current by the magnetic field when a magnetic field is incident,
  The power transmission device is:
  A power transmission side antenna comprising a power transmission side coil and a power transmission side inclusion portion having a dielectric covering the power transmission side coil;
  Via the power transmission side antenna of the power transmission device, the impedance of the good conductor medium, the impedance adjustment of the variable capacitance and variable inductor of the power transmission side antenna of the power transmission device, the variable capacitance and variable inductor of the power reception side antenna of the power reception device, A power transmission circuit on the power transmission side that outputs power at a resonance frequency determined by the impedance adjustment of
  With
  The power receiving device is:
  A power receiving side antenna comprising a power receiving side coil and a power receiving side inclusion portion having a dielectric covering the power receiving side coil;
  A power receiving side power transmission circuit for inputting power output from the power transmission device;
  With
  The sensor is
  Connected to the power receiving device to receive power,
  The size (d1 [cm]) in the direction along the coil surface of the power transmission side inclusion portion, the outer diameter (d2 [cm]) of the power transmission side inclusion portion, and the size in the direction along the coil surface of the power reception side inclusion portion. Either or both of (d1 [cm]) and the outer diameter (d2 [cm]) of the power receiving coil satisfy the relationship of ratio (d1 / d2)> 1.2.
  A power transmission system characterized by that. The power transmission side inclusion unit is:
A first power transmission side inclusion portion having a first dielectric covering the power transmission side coil;
A second power transmission side inclusion section having a second dielectric covering the first power transmission side inclusion section;
With
The power receiving side inclusion section is
A first power receiving side inclusion portion having a first dielectric covering the power receiving side coil;
A second power receiving side inclusion having a second dielectric covering the first power receiving side inclusion;
The power transmission system according to any one of claims 1 to 4, further comprising:   A power transmission system that includes a power transmission device, a power reception device, and a sensor, and wirelessly transmits power in a good conductor medium that generates an induced current by the magnetic field when a magnetic field is incident,
  The power transmission device is:
  A power transmission side antenna comprising a power transmission side coil and a power transmission side inclusion portion having a dielectric covering the power transmission side coil;
  Resonance determined by the impedance adjustment of the good conductor medium, the variable capacitance of the power transmission antenna and the variable inductor, and the impedance adjustment of the variable capacitance of the power reception antenna of the power receiving device and the variable inductor via the power transmission antenna. A power transmission circuit that transmits power at a frequency; and
  With
  The power transmission side inclusion unit is:
  A first power transmission side inclusion portion having a first dielectric covering the power transmission side coil;
  A second power transmission side inclusion section having a second dielectric covering the first power transmission side inclusion section;
  With
  The power receiving device is:
  The power receiving side antenna comprising a power receiving side inclusion portion having a power receiving side coil and a dielectric covering the power receiving side coil;
  A power receiving side power transmission circuit for inputting power output from the power transmission device;
  With
  The power receiving side inclusion section is
  A first power receiving side inclusion portion having a first dielectric covering the power receiving side coil;
  A second power receiving side inclusion having a second dielectric covering the first power receiving side inclusion;
  With
  The sensor is
  Connected to the power receiving device to receive power
  A power transmission system characterized by that. A power transmission system transmission device that includes a power transmission device, a power reception device, and a sensor, and wirelessly transmits power in a good conductor medium that generates an induced current by the magnetic field when a magnetic field is incident thereon,
A power transmission side antenna comprising a power transmission side coil and a power transmission side inclusion portion having a dielectric covering the power transmission side coil;
Via said power transmission side antenna, determined by the impedance adjustment of the variable capacitor and the variable inductor of the power receiving antenna impedance adjustment and the power receiving apparatus of the variable capacitance and the variable inductor of the impedance before and SL power transmission side antenna conductor medium resonance A power transmission circuit that transmits power at a frequency; and
The combined capacitance component of the capacitance component (C1 [pF]) constituting the impedance of the power transmission side antenna and the capacitance component (C1 ′ [pF]) of the power transmission side power transmission circuit is C10, and the impedance of the power reception side antenna is A combined capacitance component of the capacitance component (C2 [pF]) to be configured and a capacitance component (C2 ′ [pF]) of the power receiving side power transmission circuit of the power receiving device is C20, and the combined capacitance component C10 and the combined capacitance component C20 30> C3, where C3 is the capacitance component of the capacitance formed by the medium interposed between the power transmission device and the power reception device, and d is the distance between the power transmission side antenna and the power reception side antenna. An impedance adjusting unit that adjusts the impedance so as to satisfy the relationship of xd ÷ (C10 + C20)>0.5;
A power transmission device comprising: A power transmission system reception device comprising a power transmission device, a power reception device, and a sensor, wherein when a magnetic field is incident, the magnetic field wirelessly transmits power in a good conductor medium that generates an induced current by the magnetic field,
A power receiving side antenna comprising a power receiving side coil and a power receiving side inclusion portion having a dielectric covering the power receiving side coil;
Through the power receiving antenna, the resonant frequency determined by the impedance adjustment of the variable capacitor and the variable inductor of the impedance adjusting said power receiving antenna of a variable capacitance and a variable inductor of the power transmission antenna of the power transmission apparatus and impedance of the conductor medium A power receiving side power transmission circuit for inputting power at
A power receiving device comprising: A power transmission device having a power transmission side antenna including a power transmission side coil and a power transmission side inclusion portion having a dielectric covering the power transmission side coil, and a power reception side including a power reception side coil and a power reception side inclusion portion having a dielectric covering the power reception side coil A power transmission method for a power transmission system comprising a power receiving device having a side antenna and a sensor , wherein, when a magnetic field is incident , wirelessly transmits power in a good conductor medium that generates an induced current therein by the magnetic field ,
Via a power transmission antenna of the prior SL power transmitting device, a variable capacitance and a variable inductor of the power receiving antenna impedance adjustment and the power receiving apparatus of the variable capacitance and the variable inductor of the power transmission side antenna impedance and the power transmission device of the good conductor medium and outputting power at a resonant frequency determined by the impedance adjustment and,
The combined capacitance component of the capacitance component (C1 [pF]) constituting the impedance of the power transmission side antenna and the capacitance component (C1 ′ [pF]) of the power transmission side power transmission circuit of the power transmission device is C10, and the power reception side antenna The combined capacitance component of the capacitance component (C2 [pF]) constituting the impedance of the power receiving device and the capacitance component (C2 ′ [pF]) of the power receiving side power transmission circuit of the power receiving device is C20, and the combined capacitance component C10 and the combined When the capacitance component of the capacitance formed by the capacitance component C20 and the medium interposed between the power transmission device and the power reception device is C3, and the distance between the power transmission side antenna and the power reception side antenna is d, Adjusting the impedance to satisfy the relationship of 30> C3 × d ÷ (C10 + C20)>0.5;
And entering the power output of the power transmitting device,
And to receive power is connected before Symbol powered device,
A power transmission method for a power transmission system , comprising : A power transmission device having a power transmission side antenna including a power transmission side coil and a power transmission side inclusion portion having a dielectric covering the power transmission side coil, and a power reception side including a power reception side coil and a power reception side inclusion portion having a dielectric covering the power reception side coil A power transmission method for a transmission device of a power transmission system that includes a power receiving device having a side antenna and a sensor and wirelessly transmits power in a good conductor medium in which an induced current is generated by the magnetic field when a magnetic field is incident. There,
Through the power transmission side antenna, the power at the resonance frequency determined by the impedance adjustment of the variable capacitor and the variable inductor of the impedance adjusting said power receiving antenna of a variable capacitance and a variable inductor of the power transmission antenna to the impedance of the conductor medium Output ,
The combined capacitance component of the capacitance component (C1 [pF]) constituting the impedance of the power transmission side antenna and the capacitance component (C1 ′ [pF]) of the power transmission side power transmission circuit of the power transmission device is C10, and the power reception side antenna The combined capacitance component of the capacitance component (C2 [pF]) constituting the impedance of the power receiving device and the capacitance component (C2 ′ [pF]) of the power receiving side power transmission circuit of the power receiving device is C20, and the combined capacitance component C10 and the combined When the capacitance component of the capacitance formed by the capacitance component C20 and the medium interposed between the power transmission device and the power reception device is C3, and the distance between the power transmission side antenna and the power reception side antenna is d, Adjusting the impedance to satisfy the relationship of 30> C3 × d ÷ (C10 + C20)>0.5;
A power transmission method for a transmission apparatus , comprising : A power transmission device having a power transmission side antenna including a power transmission side coil and a power transmission side inclusion portion having a dielectric covering the power transmission side coil, and a power reception side including a power reception side coil and a power reception side inclusion portion having a dielectric covering the power reception side coil A power transmission method for a receiver of a power transmission system that includes a power receiving device having a side antenna and a sensor and wirelessly transmits power in a good conductor medium that generates an induced current by the magnetic field when a magnetic field is incident. There,
Through the power receiving antenna consisting of the power receiving side including portion having a dielectric covering the power receiving coil and the receiver coil, the impedance adjustment and the power receiving side of the variable capacitor and the variable inductor of the power transmission antenna and the impedance of the conductor medium Inputting power at a resonance frequency determined by the impedance adjustment of the variable capacitance of the antenna and the variable inductor ,
Power transmission method of the receiving apparatus which comprises a.