WO2015129247A1 - Dispositif, système et procédé d'alimentation électrique sans fil - Google Patents

Dispositif, système et procédé d'alimentation électrique sans fil Download PDF

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Publication number
WO2015129247A1
WO2015129247A1 PCT/JP2015/000892 JP2015000892W WO2015129247A1 WO 2015129247 A1 WO2015129247 A1 WO 2015129247A1 JP 2015000892 W JP2015000892 W JP 2015000892W WO 2015129247 A1 WO2015129247 A1 WO 2015129247A1
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Prior art keywords
power
unit
power transmission
wireless power
wireless
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PCT/JP2015/000892
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English (en)
Japanese (ja)
Inventor
周平 吉田
田能村　昌宏
薫 静野
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日本電気株式会社
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Publication of WO2015129247A1 publication Critical patent/WO2015129247A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63G—OFFENSIVE OR DEFENSIVE ARRANGEMENTS ON VESSELS; MINE-LAYING; MINE-SWEEPING; SUBMARINES; AIRCRAFT CARRIERS
    • B63G8/00—Underwater vessels, e.g. submarines; Equipment specially adapted therefor
    • B63G8/001—Underwater vessels adapted for special purposes, e.g. unmanned underwater vessels; Equipment specially adapted therefor, e.g. docking stations
    • B63G2008/002—Underwater vessels adapted for special purposes, e.g. unmanned underwater vessels; Equipment specially adapted therefor, e.g. docking stations unmanned
    • B63G2008/005—Underwater vessels adapted for special purposes, e.g. unmanned underwater vessels; Equipment specially adapted therefor, e.g. docking stations unmanned remotely controlled
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H25/00—Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
    • B63H25/02—Initiating means for steering, for slowing down, otherwise than by use of propulsive elements, or for dynamic anchoring
    • B63H2025/028—Initiating means for steering, for slowing down, otherwise than by use of propulsive elements, or for dynamic anchoring using remote control means, e.g. wireless control; Equipment or accessories therefor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/90—Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment

Definitions

  • the present invention relates to a wireless power supply apparatus, a wireless power supply system, and a wireless power supply method.
  • an information collection system using an unmanned aerial vehicle has been proposed and widely known.
  • an unmanned aerial vehicle refers to the whole mobile body which people, such as an unmanned explorer, an unmanned submarine, and a submarine, are not boarding.
  • an underwater robot that can be controlled by wireless communication even underwater using a work device, a power supply device, and a control device as independent units has been disclosed (see Patent Document 1).
  • Patent Document 1 it is desirable to supply power wirelessly to an unmanned aircraft disclosed in Patent Document 1. This is because there is a case where it is physically difficult to lay a power cable for supplying power, or a very high cost may be required for laying a power cable. Even if it can be laid, activities inside a nuclear reactor are required in a narrow area such as in the water environment such as in a distribution pipe. For this reason, the problem that an electric power cable tends to get entangled with the underwater obstacle in a narrow area
  • the position of the drone fluctuates constantly and irregularly due to the environment of the medium such as underwater surrounding the drone such as tidal current and buoyancy, and the drone's own shaking caused by the environmental change.
  • the positional relationship between the wireless power transmitting unit and the wireless power receiving unit or each device equipped with these constantly varies. For this reason, when wirelessly feeding an unmanned aircraft operating underwater or in the sea, unlike wireless power feeding in the air, there arises a problem that stable control is difficult.
  • FIG. 32 is a conceptual diagram that generalizes the relationship between the distance between the wireless power transmitting unit and the wireless power receiving unit and the wireless power feeding efficiency when the resonance type wireless power feeding is used.
  • the resonance method described here refers to a method in which an antenna having a high Q value is resonated by a resonance phenomenon and wireless power feeding is performed.
  • FIG. 32 shows the relationship between the frequency and the wireless power feeding efficiency in the case of the distance a between the wireless power transmitting unit and the wireless power receiving unit and in the case of the distance b.
  • the optimum frequency for power supply (hereinafter referred to as “optimum frequency”) changes.
  • the change in the optimum frequency occurs due to a change in the resonance state between the wireless power transmission unit antenna and the wireless reception unit antenna (see Patent Document 4).
  • Patent Document 4 calculates the control direction of the optimum frequency from the differential value with respect to the frequency of the power transmission characteristic (that is, the optimum frequency should be controlled to the high frequency side or the low frequency side), A control system for an electric vehicle that controls the frequency and load accordingly is disclosed.
  • FIG. 33 is a control block diagram conceptually showing the frequency control system for controlling the frequency described in Patent Document 4.
  • FIG. 34A, 34B, and 34C are graphs of frequency characteristics compensated by the frequency control system.
  • the gain determination circuit determines the control gain (f ( ⁇ )) and the direction of frequency control (see FIG. 34B) based on the difference from the target wireless power supply efficiency ( ⁇ cmd ). High frequency direction or low frequency direction to be shown) is determined.
  • the frequency control circuit and the frequency generation circuit perform frequency control based on f ( ⁇ ).
  • the operating point at this time is controlled to a frequency (frequency of a radio wave propagating between the wireless power transmitting unit and the wireless power receiving unit at the time of power supply) such that the wireless power supply efficiency ( ⁇ ) is high as shown in FIG. 34C.
  • Patent Document 1 In the case of wireless power supply in the air, there is almost no energy loss in the atmosphere as the medium, whereas in the case of wireless power supply in the water or in the sea, the water or seawater that is the medium has higher conductivity than the air. Therefore, a loss occurs when energy propagates through the medium. The cause of this energy loss is based on the conductivity in water and seawater and the electric field generated in water and seawater.
  • the distance between the wireless power transmission unit that transmits power wirelessly and the wireless power reception unit that receives this power is generally required to be approximately 10 cm (centimeters) or more. This distance is approximately 10 cm in water.
  • the distance between the wireless power transmitting unit and the wireless power receiving unit is less than 10 cm, there is a risk of collision due to water flow or the like.
  • Patent Document 1 describes wireless power feeding technology in seawater, but does not describe how to solve the above energy loss problem.
  • Patent Literature 2 and Patent Literature 3 disclose wireless power feeding technology in seawater. However, when the power transmission distance is about 2 cm at the maximum, and wireless power feeding is performed to a drone that is driven in seawater or underwater. It is practically difficult to wirelessly feed a distance necessary for practical use, that is, a distance of 10 cm or more.
  • various media such as rivers, fresh water, tap water, soil, and concrete as shown in the table of FIG. 35 also have relatively high electrical conductivity and relative dielectric constant (hereinafter referred to as this medium). It is described as “good conductor medium”). Therefore, the same problem can occur when trying to transmit power wirelessly in such a good conductor medium in addition to seawater.
  • FIG. 36 is a graph showing the relationship between the distance before the occurrence of shaking (time T 0 ) and after the occurrence (time T 0 + T 22 ) and the wireless power feeding efficiency
  • FIG. 37A, FIG. 37B, FIG. FIG. 37D is a graph showing the concept of frequency control in wireless power feeding in water over time when the technique described in Patent Document 4 is applied.
  • the graph shown by the solid line is the frequency control when the distance between the wireless power transmitting unit and the wireless power receiving unit is about 5 cm
  • the graph shown by the dotted line is the frequency control when the distance is about 10 cm.
  • the present invention was made to solve the above problems.
  • the main object of the present invention is to provide a wireless power feeding apparatus and the like that can stably perform wireless power feeding even in an environment such as seawater or underwater.
  • the first aspect of the present invention is to A power transmission means for transmitting power wirelessly in a good conductor medium; Power receiving means for receiving power by receiving wireless power transmitted from the power transmitting means; System control means for controlling power transmission means and power reception means, the system control means, This is a wireless power feeding device that resonates the frequency determined by the impedance of the power transmission means, the impedance of the power reception means, and the impedance of the good conductor medium while adjusting the phase, and transmits power from the power transmission means to the power reception means.
  • the second aspect of the present invention is: A power transmission means for transmitting power wirelessly in a good conductor medium; Power receiving means for receiving power by receiving wireless power transmitted from the power transmitting means; System control means for controlling power transmission means and power reception means, the system control means, A wireless power feeding system that predicts environmental variation of a good conductor medium and controls the position of at least one of a power transmitting unit and a power receiving unit in wireless power feeding.
  • the third aspect of the present invention is: In a good conductor medium, the power transmission means sends power wirelessly, The power receiving means receives power by receiving the wireless power transmitted from the power transmitting means, When the system control means predicts the environmental variation of the good conductor medium and controls the position of at least one of the power transmission means and the power reception means in wireless power feeding, The data collection means collects data related to the environmental fluctuation of the good conductor medium and the position fluctuation of the power receiving means caused by the environmental fluctuation, The data storage means stores the collected data, Based on the collected data, the data prediction means determines parameters for predicting environmental fluctuations and position fluctuations, The wireless power supply method includes that the parameter control means controls the wireless power supply based on the parameter.
  • the wireless power supply apparatus of the present invention it is possible to perform wireless power supply stably and efficiently even under continuous occurrence of positional fluctuations due to environmental fluctuations of surrounding media and fluctuations of the drone itself.
  • FIG. 4 is an equivalent circuit diagram when wireless power propagates from a power transmission unit to a power reception unit. It is the schematic which shows the electric field vector and magnetic field vector in a wireless power feeder. It is the schematic which shows the pointing vector which arises based on the electric field vector and magnetic field vector in a wireless power feeder. It is a block diagram of the wireless power feeder in 3rd embodiment of this invention. It is a block diagram of the wireless power feeder in 3rd embodiment of this invention. It is a side view of the wireless electric power feeder in 3rd embodiment of this invention.
  • Temperature fluctuations in the seawater is a graph for explaining a control state (time T 0) in an environment that is irregularly generated. Temperature fluctuations in the seawater is a graph for explaining a control state (time T 0 + T 121) in an environment that is irregularly generated. Temperature fluctuations in the seawater is a graph for explaining a control state (time T 0 + T 221) in an environment that is irregularly generated. Temperature fluctuations in the seawater is a graph for explaining a control state (time T 0 + T 311) in an environment that is irregularly generated. It is a figure for demonstrating the control state by a wireless electric power feeding system. It is a figure for demonstrating the control state by a wireless electric power feeding system.
  • FIG. 2 It is controlled by the technique described in Patent Document 2, at time T 0, which is a diagram for explaining the frequency characteristic. Is controlled by the technique described in Patent Document 2, at time T 0 + T 11, is a diagram for explaining the frequency characteristic. Is controlled by the technique described in Patent Document 2, at time T 0 + T 21, is a diagram for explaining the frequency characteristic.
  • a wireless power feeding apparatus 100 includes a power transmission unit 3 that transmits power wirelessly, and a power reception unit 4 that receives wireless power transmitted from the power transmission unit 3. And a system control unit 2 that controls the power transmission unit 3 and the power reception unit 4.
  • the wireless power feeder 100 wirelessly transmits power in the good conductor medium 5.
  • the system control unit 2 resonates the frequency determined by the impedance of the power transmission unit 3, the impedance of the power reception unit 4, and the impedance of the good conductor medium 5 while adjusting the phase, and transmits power from the power transmission unit 3 to the power reception unit 4. Further, this frequency is set to a frequency at which transmission efficiency can be expected. Thereby, the efficiency of power transmission / reception can be increased. As a result, even in an environment such as seawater or underwater, wireless power feeding can be stably and efficiently performed.
  • the good conductor medium 5 in each embodiment is seawater, but the present invention is not limited to this.
  • substances such as rivers, fresh water, tap water, soil, and concrete shown in the table of FIG. 35 that have a conductivity of 1 ⁇ 10 ⁇ 4 S / m (Siemens per meter) or more and a relative dielectric constant greater than 1. It may be.
  • the power transmission unit 13 and the power reception unit 14 are covered with a good conductor medium 15 and are connected to the system control unit 12 by wire or wirelessly. ing.
  • FIG. 1 As shown in FIG. 2, in the wireless power feeding apparatus 200 according to the second embodiment of the present invention, the power transmission unit 13 and the power reception unit 14 are covered with a good conductor medium 15 and are connected to the system control unit 12 by wire or wirelessly. ing.
  • the power transmission unit 13 includes a power transmission coil 131 and a power transmission side inclusion unit 132 made of a dielectric material that covers the power transmission coil 131.
  • the power reception unit 14 includes a power reception coil 141 and a power reception side inclusion unit 142.
  • the power transmission coil 131 and the power reception coil 141 are formed 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 not limited thereto. None happen.
  • the power transmission coil and the power reception coil are collectively referred to as a power transmission coil.
  • the power transmission unit may have a function as a power reception unit, and the power reception unit may have a function as a power transmission unit.
  • the power transmission unit and the power reception unit may have the same configuration.
  • the power transmission side inclusion portion 132 and the power reception side inclusion portion 142 are made of a dielectric material having a relative dielectric constant of about 2 to 10 and a dielectric loss tangent of 0.01 or less, such as polyethylene, polyimide, polyamide, fluororesin, and acrylic.
  • a dielectric material having a relative dielectric constant of about 2 to 10 and a dielectric loss tangent of 0.01 or less, such as polyethylene, polyimide, polyamide, fluororesin, and acrylic.
  • the equivalent circuit 16 when the wireless power transmitted from the power transmission unit 13 propagates to the power reception unit 14 will be described with reference to FIG.
  • the equivalent circuit 16 includes a power transmission unit 13, a power reception unit 14, a power supply source 17, and the like, which are connected to the system control unit 12 through a wired or wireless path.
  • the power transmission unit 13 includes a power transmission coil 131 and a power transmission side impedance adjustment unit 133 that adjusts the impedance of the power transmission coil 131.
  • the power receiving unit 14 includes a power receiving coil 141 and a power receiving side impedance adjusting unit 143 that adjusts the impedance of the power receiving coil 141.
  • the impedance of the power transmission coil 131 in the power transmission unit 13 mainly includes an inductive component L1 and a capacitance component C1, and these constitute the shape of the coil, the number of turns, the thickness of the copper wire, and the power transmission side inclusion unit 132. It is uniquely determined by the dielectric constant and the size of the dielectric.
  • the impedance of the power receiving coil 141 in the power receiving unit 14 is also made up of an inductive component L2 and a capacitive component C2, and is uniquely determined by the shape of the coil and the dielectric constant of the dielectric constituting the power receiving side inclusion unit 142 and its size. Determined.
  • the power transmission side impedance adjustment unit 133 and the power reception side impedance adjustment unit 143 are collectively referred to simply as an impedance adjustment unit.
  • L3 is a mutual inductance component that is a mutual induction between the power transmission coil 131 and the power reception coil 141.
  • C3 is a capacitive component composed of the power transmission unit 13, the power reception unit 14, and the good conductor medium 15 in FIG.
  • the power transmission side impedance adjustment unit 133 includes a capacitor C1 'that is a variable capacitor and a phase variable device D1.
  • the power receiving side impedance adjustment unit 143 includes a capacitor C2 'that is a variable capacitor and a phase variable device D2. Since the wireless power feeding efficiency at the time of propagation needs to be impedance matched (that is, resonance) at the frequency of the propagating AC power in the propagation path, the power transmission side impedance adjustment unit 133 and the power reception side impedance adjustment unit 143 are required. Is adjusted so as to obtain impedance matching at an arbitrary frequency.
  • phase shifters D1 and D2 are circuits for performing phase adjustment when there is a phase fluctuation due to an environmental change.
  • this phase variable circuit can compensate for a capacitive impedance variation determined by the dielectric constant of seawater or the like.
  • This adjustment is performed according to an instruction from the system control unit 12. Specifically, even if the positional relationship between the power transmission unit 13 and the power reception unit 14 changes during power transmission and the value of the capacitance C3 varies, the capacitance C1 ′, the phase variable device D1, and the capacitance C2 ′ are compensated for the variation.
  • the phase shifter D2 is appropriately adjusted to maintain stable resonance and supply stable power.
  • the varactor diode (variable capacitance diode) may be used as the capacitance changing means, or a plurality of capacitors may be combined with the switch transistor.
  • As the phase shifter an operational amplifier, a transistor, a diode, a transmission line, a variable capacitor, a variable inductor, or a phase shifter in combination of these is used.
  • the power supply source 17 is a high-frequency power generator that generates high-frequency AC power to be sent from the power transmission unit 13 to the power reception unit 14 in accordance with an instruction from the system control unit 12.
  • the electric field vector and the magnetic field vector in the wireless power supply apparatus 200 are substantially parallel to the coil surface.
  • the pointing vector generated based on the electric field vector and the magnetic field vector that is, the flow of electromagnetic energy, generates a pointing vector from the power transmission unit 13 to the power reception unit 14 substantially perpendicularly to the coil surface as shown in FIG. A typical energy flow.
  • the effect of the second embodiment of the present invention will be described.
  • the present embodiment by generating the pointing vector in the good conductor medium 15 perpendicular to the coil surface, it is possible to minimize transmission loss that occurs when energy is transmitted through the good conductor medium.
  • the radial pointing vector flow is clearly different from the resonance pointing vector flow.
  • the resonance method is used, the pointing vector flow spreads in a spiral shape, and thus does not exhibit such a radiative behavior.
  • a wireless power feeder 300 according to a third embodiment of the present invention will be described with reference to FIG.
  • the wireless power feeding apparatus 300 is obtained by changing the configurations of the power transmission unit and the power reception unit of the first and second embodiments, and other configurations are the same as those of the first and second embodiments.
  • the wireless power supply apparatus 300 includes a power transmission unit 23 and a power reception unit 24.
  • the power transmission unit 23 includes a power transmission coil 231, a first power transmission side inclusion unit 232, a second power transmission side inclusion unit 233, and a third power transmission side inclusion unit 234.
  • the first power transmission side inclusion section 232 is made of a first dielectric covering the power transmission coil 231.
  • the second power transmission side inclusion portion 233 is made of a second dielectric that covers the first power transmission side inclusion portion 232.
  • the third power transmission side inclusion portion 234 is made of a third dielectric that covers the second power transmission side inclusion portion 233.
  • the power reception unit 24 includes a power reception coil 241, a first power reception side inclusion unit 242, a second power reception side inclusion unit 243, and a third power reception side inclusion unit 244.
  • the first power transmission side inclusion unit 232 and the first power reception side inclusion unit 242 are collectively referred to as a first inclusion unit.
  • the second power transmission side inclusion unit 233 and the second power reception side inclusion unit 243 are collectively referred to as a second inclusion unit.
  • the third power transmission side inclusion portion 234 and the third power reception side inclusion portion 244 are collectively referred to as a covering portion.
  • the first power transmission side inclusion portion 232, the third power transmission side inclusion portion 234, the first power reception side inclusion portion 242 and the third power reception side inclusion portion 244 are, for example, specific dielectrics such as polyethylene, polyimide, polyamide, fluororesin, and acrylic. It is made of a dielectric having a ratio of about 2 to 10 and a dielectric loss tangent of 0.01 or less.
  • the second power transmission side inclusion portion 233 and the second power reception side inclusion portion 243 include a liquid having a low electrical conductivity, for example, pure water or distilled water, which is equal to the specific gravity of the good conductor medium 25 such as seawater.
  • neutral buoyancy can be obtained in the good conductor medium 25 by the second power transmission side inclusion portion 233 and the second power reception side inclusion portion 243.
  • Neutral buoyancy is a neutral buoyancy state that does not lift or sink in the good conductor medium 25.
  • the wireless power feeding apparatus 300 may include the above-described impedance adjustment unit.
  • an AC power source (not shown) outputs AC power at a predetermined frequency.
  • the output AC power is supplied to the power transmission coil 231, and the power transmission coil 231 sends the AC power to the external good conductor medium 25 as electromagnetic energy.
  • the power receiving unit 24 sends the transmitted electromagnetic energy through the power receiving coil 241.
  • the combined impedances of the power transmission unit 23, the power reception unit 24, and the good conductor medium 25 are adjusted so as to resonate at the frequency of the transmission power.
  • the electric power sent by the power receiving coil 241 is supplied to a target load, such as a battery, and power transmission is completed.
  • the wireless power feeding apparatus 300 maximizes the power sent to the power receiving coil 241 by resonating with the combined impedance of the power transmitting unit 23, the power receiving unit 24, and the good conductor medium 25. it can.
  • the second power transmission side inclusion portion 233 and the second power reception side inclusion portion 243 are made of a dielectric, charges are charged to the interface via the third power transmission side inclusion portion 234 and the third power reception side inclusion portion 244. It produces and operates in the same way as a parallel plate capacitor that stores energy.
  • the second power transmission side inclusion unit 233 and the second power reception side inclusion unit 243 store energy proportional to the relative dielectric constant of the second power transmission side inclusion unit 233 and the second power reception side inclusion unit 243.
  • the first power transmission side inclusion unit 232 and the first power reception side inclusion unit 242 have an effect of reducing dielectric loss in the vicinity of the power transmission coil 231 and the power reception coil 241.
  • the wireless power feeding apparatus 300 includes the third power transmission side inclusion unit 234 and the third power reception side inclusion unit 244, the second power transmission side inclusion unit 233 and the second power reception side inclusion unit 243 include the good conductor medium 25.
  • a liquid having a low electrical conductivity, such as pure water or distilled water, can be used. Therefore, the power transmission unit 23 and the power reception unit 24 can cause the second power transmission side inclusion unit 233 and the second power reception side inclusion unit 243 to act as neutral buoyancy.
  • the wireless power feeding apparatus 300 does not need to be provided with a special specific gravity adjustment mechanism, the cost can be reduced.
  • the second power transmission side inclusion unit 613 (second power reception side inclusion unit 623) is an upper surface and a lower surface of the first power transmission side inclusion unit 612 (first power reception side inclusion unit 622). That is, only the surface parallel to the coil surface is covered. That is, the first power transmission side inclusion unit 612 (first power reception side inclusion unit 622) is sandwiched between the second power transmission side inclusion unit 613 (second power reception side inclusion unit 623).
  • the side surface of the first power transmission side inclusion unit 612 (first power reception side inclusion unit 622), that is, the surface perpendicular to the coil surface is directly covered by the third power transmission side inclusion unit 614 (third power reception side inclusion unit 624). It has a structure that is called.
  • FIG. 8 is a model diagram of the power transmission unit 61 in this simulation model viewed from the side.
  • the 1st power transmission side inclusion part 612 is comprised with the fluororesin of length 250mm, width 250mm, and height 4.5mm.
  • the relative dielectric constant is 10.2 and the dielectric loss tangent is 0.0023.
  • the 2nd power transmission side inclusion part 613 is comprised with two fluororesins of length 250mm, width 250mm, and height 6mm.
  • the relative dielectric constant is 6.2 and the dielectric loss tangent is 0.0019.
  • the 3rd power transmission side inclusion part 614 is comprised with acrylic 260 mm long, 260 mm wide, 26.5 mm high, and 5 mm thick.
  • the relative permittivity of acrylic is 3.3, and the dielectric loss tangent is 0.04.
  • the power reception unit 62 has the same configuration as the power transmission unit 61 described above.
  • the spiral coil 6111 is composed of a wiring composed of 50 mm conductors with an outer periphery of 208 mm.
  • the wiring has a diameter of 1 mm, and the wiring has an interval of 1 mm.
  • the spiral coil 6112 has the same size as the spiral coil 6111.
  • the spiral coil 6111 and the spiral coil 6112 are arranged at a distance of 0.5 mm.
  • the outermost end of the spiral coil 6111 and the outermost end of the spiral coil 6112 serve as a high-frequency power feeding port.
  • the direction of the spiral of the spiral coil 6111 and the direction of the spiral of the spiral coil 6112 are configured such that a magnetic field is generated in the same direction via the power supply port.
  • FIGS. 11 and 12 are model views of the spiral coils 6211 and 6212 of the power receiving unit 62 as viewed from the power transmitting unit side.
  • the spiral coil 6211 is composed of a wiring composed of a conductor with 50 turns and an outer periphery of 208 mm.
  • the wiring has a diameter of 1 mm, and the wiring has an interval of 1 mm.
  • the spiral coil 6212 has the same size as the spiral coil 6211.
  • the spiral coil 6211 and the spiral coil 6212 are arranged with a distance of 0.5 mm.
  • An outermost end portion of the spiral coil 6211 and an outermost end portion of the spiral coil 6212 serve as a power reception port for high-frequency power.
  • the direction of the spiral of the spiral coil 6211 and the direction of the spiral of the spiral coil 6212 are configured such that a magnetic field is generated in the same direction via the power receiving port.
  • the power reception unit 62 has the same configuration as the power transmission unit 61.
  • the configuration shown here is an example, and the same effect can be obtained even if the power transmission unit 61 and the power reception unit 62 are not the same configuration.
  • the wireless power feeding apparatus 300 even when the power transmitting unit and the power receiving unit are relatively separated from each other, the electromagnetic energy that diffuses and disappears in the good conductor medium is minimized. Can be suppressed. In addition, since it is not necessary to provide a mechanism for adjusting the specific gravity, it is possible to increase the distance between the power transmitting and receiving units while suppressing the manufacturing cost even in the case of wireless power feeding in a good conductor medium such as seawater.
  • a wireless power feeder (not shown) according to a fourth embodiment of the present invention will be described.
  • the wireless power feeding device of the fourth embodiment is a modification example of the impedance adjustment of the power transmission unit and the power receiving unit described in the first to third embodiments, and other devices are the same as those of the first to third embodiments. Since these are the same, the drawings and description of other configurations are omitted.
  • n-th 2 ⁇ n-th (n is a positive integer) counted from the low frequency side among the resonance frequencies determined by the impedance of the power transmission unit, the impedance of the power reception unit, and the impedance of the good conductor medium. ), That is, power transmission is performed using even-numbered resonance frequencies.
  • FIG. 14A and FIG. 14B show the relationship between the impedance and frequency of the power transmission unit and the power reception unit at the output end of the wireless power reception unit in seawater.
  • the wireless power transmitting unit and the power receiving unit described in the first to third embodiments are used for power transmission in seawater, not limited to this modified example, characteristics similar to those in FIGS. 14A and 14B can be obtained.
  • FIG. 15 shows the relationship between the resonance frequency and the real part impedance at the output end of the power receiving unit at the resonance frequency in the present embodiment.
  • the resonance frequencies are 0.121 MHz (megahertz), 0.321 MHz, 0.347 MHz,.
  • the real part impedance at the output end of the wireless power receiving unit at each resonance frequency is 10 Ohm (ohm), 2325 Ohm, 433 Ohm,.
  • the graph shown in FIG. 16 represents a comparison of wireless power supply efficiency obtained when three types of loads of 10 Ohm, 2325 Ohm, and 433 Ohm are connected to the power receiving unit output terminal. From FIG. 16, it can be seen that the highest wireless power feeding efficiency can be obtained in the case of a load of 2325 Ohm, that is, in the case of utilizing resonance at a frequency of 0.321 MHz.
  • the resonance frequency is determined by the impedance of the power transmission unit, the impedance of the power reception unit, and the impedance of a medium such as seawater. This is considered to be because, when wireless power feeding is performed, high power transmission efficiency is obtained when the currents flowing through the power transmission unit and the power reception unit are in opposite phases.
  • the current flowing through the power transmitting unit and the power receiving unit is resonated at the second frequency counted from the low frequency side, the current is reversed, and when the current is resonated at the first frequency counted from the low frequency side, , Was in phase.
  • the wireless power feeding apparatus 500 includes a power receiving unit 54 on the unmanned aircraft 51 side and a power transmitting unit 53 disposed below the power receiving unit 54.
  • the power transmission / reception unit has an upper and lower arrangement configuration, but is not limited to this, and can be freely configured as long as power can be supplied. Since other devices are the same as those in the first to third embodiments, the description thereof is omitted.
  • the power receiving unit 54 is formed to be curved along the outer shape of the drone 51.
  • the power receiving unit 54 is formed by forming a wiring pattern on a flexible printed circuit board material such as polyimide.
  • the power receiving unit 54 is formed by molding a material such as resin using a curved mold and forming a wiring pattern on the molded resin.
  • the power receiving unit 54 is formed by bending a non-flexible substrate such as ceramic by a method such as cutting or bonding, and forming a wiring pattern on the curved non-flexible substrate.
  • the power receiving unit 54 can also be created by a combination of the methods described above.
  • the power receiving unit 54 when the power receiving unit 54 is mounted on the drone 51 by bending the power receiving unit 54 along the outer shape of the drone 51, no special tool or special processing is required. Therefore, it is possible to easily mount using an inexpensive tool such as a bolt or a nut. As a result, the mounting cost of the wireless power supply apparatus 500 can be reduced.
  • the wireless power feeding system 600 includes a drone 31 that wirelessly receives power, a power transmission unit 33 that wirelessly transmits power, and the like.
  • the drone 31 includes a system control unit 32 and a power reception unit 34.
  • the periphery of the wireless power feeding system 600 is covered with a good conductor medium 35 such as seawater.
  • the unmanned aerial vehicle 31 is a moving body on which a person used for data collection or the like is not on board, such as an unmanned spacecraft.
  • the system control unit 32 controls the wireless power feeding system 600. In FIG. 18, the system control unit 32 is mounted on the drone 31, but all or part of the control may be mounted on the power transmission unit 33 side.
  • the power receiving unit 34 is a port for power transmission provided in the drone 31.
  • the power transmission unit 33 is a port that transmits power to the drone 31.
  • the system control unit 32 includes a data collection unit 121, a data prediction unit 122, a parameter control unit 123, an unmanned aircraft control unit 124, a power transmission / reception control unit 125, and a data storage unit 126.
  • the data collection unit 121 is configured with a sensor for measuring data related to environmental fluctuations of a medium such as seawater surrounding the drone 31 and position fluctuations of the drone 31.
  • a gyro sensor, a temperature sensor, a pressure sensor, or the like is used as the sensor.
  • a peripheral circuit (not shown) for driving these sensors is provided.
  • the environmental fluctuation refers to fluctuations in the environmental temperature, dielectric constant, magnetic permeability, and the like of the medium around the drone 31.
  • the position variation refers to a change in the position, angle, etc. of the drone 31 due to shaking or tidal current.
  • the data storage unit 126 stores data collected by the data collection unit 121, data tables and mathematical formulas necessary for data prediction, and the like.
  • the data prediction unit 122 acquires data from the data collection unit 121 and uses this data to predict future environmental fluctuations and position fluctuations. This prediction is performed at regular time intervals, distance intervals, or the like.
  • the data prediction unit 122 calculates a control parameter based on the prediction data.
  • the data prediction unit 122 can use a method such as referring to a data table prepared in advance. For example, when the data prediction unit 122 can predict an environmental change and a position change after one second, a control parameter that is optimal for the change can be determined with reference to the data table. In the calculation process, past data stored in the data storage unit 126, data tables and mathematical formulas necessary for prediction calculation, and the like may be used.
  • the parameter control unit 123 controls the unmanned aerial vehicle 31 by transmitting the unmanned aircraft control parameters related to the control of the unmanned aerial vehicle 31 to the unmanned aircraft control unit 124 among the control parameters. Furthermore, the power transmission / reception control parameter related to the control of the power reception unit 34 and the power transmission unit 33 is transmitted to the power transmission / reception control unit 125 to control the power reception unit 34 and the power transmission unit 33.
  • the parameter control unit 123 includes a processor, a program, and the like and peripheral circuits for driving the processor, the program, and the like. The above operation is hereinafter referred to as “parameter control”.
  • the drone control unit 124 determines the operation of the drone 31 according to the control parameter received from the parameter control unit 123.
  • the power transmission / reception control unit 125 determines the operations of the power transmission unit 33 and the power reception unit 34 according to the control parameter received from the parameter control unit 123.
  • the overall operation of the wireless power feeding system 600 will be described with reference to the flowchart of FIG. (A) First, in step S101, the system control unit 32 guides the drone 31 that needs wireless power feeding to the power transmission unit 33 side and arranges it at an appropriate position. (B) When the system control unit 32 determines in step S102 that the guidance has been properly completed, parameter control is performed in step S103.
  • step S102 If it is determined in step S102 that the guidance has not been properly completed, the process returns to step S101.
  • step S104 the system control unit 32 outputs AC power at a predetermined frequency from a power supply source (not shown). The output AC power is sent from the power transmission unit 33 to the external good conductor medium 15 as electromagnetic energy, and the power reception unit 34 sends it in.
  • step S105 the system control unit 32 determines whether the parameter control has been correctly completed. When the control is completed, in step S105, the system control unit 32 determines whether all wireless power feeding has been completed correctly.
  • step S104 parameter control normal end or wireless power supply end is not confirmed, the process returns to step S103.
  • step S104 parameter control by the system control unit 32 of FIG. 19 in step S103 will be described in detail with reference to the flowchart of FIG. (A)
  • step S201 the data collection unit 121 measures the state of the drone 31 and the state of the external environment of the drone 31 using the sensors described above.
  • step S ⁇ b> 202 the measured state of the external environment is converted into data and transmitted to the data prediction unit 122.
  • the data prediction unit 122 receives the data sent from the data collection unit 121.
  • the data prediction unit 122 estimates future environmental fluctuations and position fluctuations using the received data.
  • the received data may be stored in the data storage unit 126, or the stored past data may be acquired. Further, various tables, mathematical formulas, and calculation methods used for analyzing parameters stored in the data storage unit 126 may be used. For example, the data prediction unit 122 plots the acquired sensor data on the time axis and performs estimation using an extrapolation method.
  • step S205 it is determined whether or not this estimation has been properly performed. If the estimation has been performed appropriately, the process proceeds to step S206. If the estimation has not been performed properly, the process returns to step S201.
  • step S206 the data prediction unit 122 determines a control parameter based on the estimated future environmental variation and position variation. At this time, for example, a full search method or a hill climbing method is used. In addition, a genetic algorithm method can also be used.
  • step S 207 the determined control parameter is converted into data and transmitted to the parameter control unit 123.
  • step S208 the parameter control unit 123 receives the determined control parameter.
  • step S209 the parameter control unit 123 controls the drone control unit 124 and the power transmission / reception control unit 125 based on the received control parameters.
  • step S210 when the system control unit 32 confirms that all parameter control has been properly completed, this control is terminated. If the parameter control is not properly terminated, the process returns to step S201.
  • the simulation was performed on the assumption that the wireless power supply system 600 described in the sixth embodiment was applied to power supply in seawater in which temperature fluctuations constantly occur.
  • the conductivity of the seawater changes.
  • the load state changes, so that compensation is required.
  • the temperature of the seawater varies about 5% (percent) at the maximum per hour, and fluctuates constantly.
  • the effect will be described by limiting to the temperature fluctuation of seawater as a cause of environmental fluctuations, but not limited to this, as described above, the dielectric constant and permeability of the surrounding medium, etc.
  • the same control is possible for various fluctuations such as the position and angle of the moving body.
  • FIG. 22 is a graph showing the relationship between the propagation frequency of the radio wave between the wireless power transmitting unit and the wireless power receiving unit and the wireless power feeding efficiency before and after the seawater temperature fluctuation occurs.
  • FIG. 23A, FIG. 23B, FIG. 23C, and FIG. 23D show conceptual diagrams of frequency control in wireless power feeding in seawater when the control system described in this embodiment is applied.
  • various methods such as an extrapolation method and a method using Fourier transform can be used for estimating the temperature fluctuation.
  • FIG. 24A is a simulation in each case where predictive control is not performed based on the predicted future temperature change
  • FIG. 24B is a simulation in each case where predictive control is performed based on the predicted future temperature change. It is a graph which shows a comparison result. These graphs are obtained by performing measurement between the parameter prediction unit 122 and the parameter control unit 123 in the system control unit 32 shown in FIG.
  • a temperature change occurs at time 2 seconds
  • the optimum load ( ⁇ : ohm) and the optimum frequency (KHz: kilohertz) change in FIGS. 24A and 24B, the vertical axis indicates Arbitrary unit (au).
  • FIG. 24A is a result of performing control so as to achieve an optimal load and an optimal frequency using a predetermined control function with respect to the above-described temperature change.
  • the graph of FIG. 24B shows the result of performing control so that the control function is rewritten and the optimal load and the optimal frequency are obtained at the time of 2 seconds with respect to the change described above. From this result, it can be seen that when the control function is rewritten, that is, when predictive control is performed, the time required to obtain the optimum load and the optimum frequency is short. That is, when predictive control is performed, it can be said that the stability of control is improved.
  • the system control unit 32 controls control parameters related to wireless power feeding based on predicted future environmental fluctuations and position fluctuations.
  • wireless power can be stably supplied even in environments where the environmental fluctuation of the medium surrounding the drone, such as underwater, or the position fluctuation caused by the drone's own shaking continuously occurs.
  • a wireless power feeding system 700 according to a seventh embodiment of the present invention uses a plurality of sensors for data collection, and is a drone that receives power wirelessly, a power reception unit, and a power transmission unit that wirelessly transmits power And a system control unit 42 and the like. As shown in FIG.
  • the system control unit 42 includes a data collection unit 421, a data prediction unit 422, a parameter control unit 423, a drone control unit 424, a power transmission / reception control unit 425, and a data storage unit 426.
  • the periphery of the wireless power feeding system 700 is covered with a good conductor medium 45 such as seawater.
  • the data collection unit 421 includes a plurality of sensors such as a sensor 421a, a sensor 421b, and a sensor 421c in order to measure data related to environmental fluctuations of a medium such as seawater surrounding the drone and position fluctuations of the drone 21.
  • the sensors 421a and 421b are configured as temperature sensors
  • the sensor 421c is configured as a flow velocity sensor.
  • the type of sensor that can be used as the data collection unit 421 is not limited to this, and various sensors such as a pressure sensor, a gyro sensor, a speedometer, a camera, and an acoustic sensor, and devices having the same function as the sensor should be used. I can do it.
  • the data storage unit 426 stores data collected by the plurality of sensors 421a to 421c of the data collection unit 421, mathematical formulas necessary for data prediction, and the like.
  • step S301 it is determined whether or not a predetermined time for data collection, for example, 2 seconds has elapsed. Specifically, the elapse of time is determined using a timer function of the system control unit 42 or the like.
  • step S302 the data collection unit 421 measures the external temperature of the drone and the flow rate of seawater using a plurality of different sensors 421a to 421c such as a temperature sensor and a flow rate sensor.
  • the external temperature and seawater flow velocity measured by the different sensors 421a to 421c are converted into data and transmitted to the data prediction unit 422 in step S303.
  • step S304 the data prediction unit 422 receives the data transmitted from the data collection unit 421.
  • step S305 the data prediction unit 422 estimates future environmental fluctuations and position fluctuations using the received data.
  • the data prediction unit 422 estimates future environmental fluctuations and position fluctuations based on the correlation of the data regarding the state of the external environment measured by the plurality of sensors 421a to 421c. For example, when the data prediction unit 422 can predict an environmental change and a position change after 1 second, a control parameter that is optimal for the change can be determined with reference to the data table.
  • a control parameter that is optimal for the change can be determined with reference to the data table.
  • control parameters based on the above-mentioned prediction data not only a method of referring to the data table, but also an interpolation method, an extrapolation method, etc. based on the relationship between different environmental parameters and control parameters. This method can be used for determination, and other methods can also be used.
  • step S306 the system control unit 42 determines whether or not the estimation is properly performed. If the estimation is appropriately performed, the process proceeds to step S307. If the estimation is not properly performed, the process returns to step S302. Steps S307 to S311 are the same as those in the flowchart of FIG.
  • the sensor 421a, the sensor 421b, the sensor 421c, and the power receiving unit 44 are mounted on the drone.
  • the sensors 421a and 421b are temperature sensors, and the sensor 421c is a flow rate sensor.
  • the sensor 421a and the sensor 421b each measure the temperature at a predetermined time.
  • the sensor 421c measures the direction and speed of the flow velocity.
  • Information measured by the sensors 421a to 421c is converted into data and transmitted to the data prediction unit 422.
  • the data prediction unit calculates the current temperature distribution of the surrounding environment from the data acquired from the sensors 421a and 421b.
  • a change in temperature distribution around the power receiving unit 44 is predicted from the data acquired by the sensor 421c, that is, the direction and speed of the flow velocity. For example, when the distance between the sensor 421a and the power receiving unit 44 is 1 m and the flow velocity is 1 m / s (meter per second), the temperature measured by the sensor 421a is equal to the temperature distribution around the power receiving unit 44 after 1 second. Predict that will be.
  • the data prediction unit 422 performs these series of operations at predetermined time intervals, and can always obtain the latest ambient environment data.
  • a wireless power feeding system 800 includes an unmanned aircraft 71, a power transmission unit 73, a position detection unit 77, and the like.
  • the drone 71 includes a power receiving unit 74.
  • the apparatus includes a moving mechanism, a communication device, a sensing device, and a mechanism or device that is generally mounted on an unmanned aircraft. Specifically, tires and crawlers for moving, motors for driving them, wireless devices for communication, cameras for sensing, gyro sensors, temperature sensors, pressure sensors, etc. and driving these A peripheral circuit or the like is provided.
  • a plurality of unmanned aircraft 71 may exist, and each of the unmanned aircraft 71a to 71c includes a similar mechanism.
  • the power reception unit 74 and the power transmission unit 73 include an antenna for exchanging power wirelessly, an amplifier circuit, a rectifier circuit, and a mechanism and equipment necessary for wireless power feeding.
  • the power receiving unit 74 is connected to a battery, a moving mechanism, a sensing device, and the like mounted on the drone 71 by wire or wirelessly.
  • the position detection unit 77 includes a wireless local area network (LAN) system, a radio frequency identification (RFID) system, an image processing system, and the like for detecting the position of the drone 71.
  • the drone 71 and the power transmission unit 73 are components and data necessary for these position detection systems, for example, an IP (Internet Protocol) number for a wireless LAN system, an ID (identifier) tag for an RFID system, and an image processing system. It is assumed that a camera and image processing software are provided if any.
  • the position detector 77 may be provided on the drone 71 side. Since other devices and the like are the same as those in the sixth and seventh embodiments, description thereof will be omitted.
  • the operator terminal 10 commands the drone 71 to receive power at the power transmission unit 73 via the communication device while the position detection unit 77 is operating. At this time, the position detection unit 77 transmits information that enables the position detection of the power transmission unit 73 to the drone 71.
  • the drone 71 that has received the power reception command approaches the power transmission unit 73 and receives power from the power transmission unit 73 while referring to the information received from the position detection unit 77.
  • the eighth embodiment of the present invention power can be reliably supplied to the unmanned aerial vehicle even in an environment such as the inside of the nuclear reactor or in the sea, and the time related to the power supply of the unmanned aircraft can be reduced.
  • the reason is that the operator terminal 10 instructs the drone 71 to receive power at the power transmission unit 73, and the position detection unit 77 provides the drone 71 with information that enables the position detection of the power transmission unit 73. It is because it transmits.
  • the drone 71 that has received the power reception command reliably reaches the power transmission unit 73 without any hesitation while referring to the information received from the position detection unit 77, and receives power from the power transmission unit 73 at the most efficient power reception position. Because.
  • FIG. 29A shows a wireless power feeding system 900 according to the ninth embodiment of the present invention.
  • the wireless power feeding system 900 includes an ad hoc communication system 89 in the wireless device 81 of the position detector 87 as shown in the enlarged view of the wireless device 81 in FIG. 29B.
  • the ad hoc communication system is a system in which wireless LAN terminals as slave units can directly communicate with each other along with access point communication performed via a wireless LAN access point as a base unit.
  • the ad hoc communication system 89 includes a wireless communication device, a signal processing circuit, and mechanisms and devices mounted in a general ad hoc communication system.
  • the drone 81 includes a wireless power transmission unit 83a for transmitting power to other drones.
  • the drone 81 may be a plurality of wireless devices 81a, 81b, 81c, and the plurality of wireless devices 81a to 81c may be similarly equipped with an ad hoc communication function and a wireless power transmission unit 83a. Some may have an ad hoc communication function or a wireless power transmission unit 83a.
  • the ad hoc communication system 89 and devices related thereto may be installed in the surrounding environment instead of the drone 81 itself. Since other devices are the same as those in the sixth to eighth embodiments, the description thereof will be omitted.
  • the operator terminal 20 issues a command such as movement and information collection to the drone 81 via the ad hoc communication system 89.
  • the drone 81 operates according to the command.
  • the drone 81 returns the acquired information to the operator terminal 20 via the ad hoc communication system 89.
  • the drone 81 enters a standby state and waits for the next command.
  • the operator terminal 20 issues a new command to the drone 81 based on the information acquired by the drone 81.
  • the operator terminal 20 issues a command regarding movement and information collection to the drone 81 through the ad hoc communication system 89.
  • the operator terminal 20 issues a command to the drone 81a via the communicable drone 81b.
  • the drone 81a and the drone 81b move and collect information according to the command, and return the acquired information to the operator terminal 20 via the ad hoc communication system 89.
  • the operator terminal 20 issues a new command to the drones 81a to 81c based on the acquired information.
  • the series of operations shown in (a) to (d) is repeated until the operator terminal 20 stops the command.
  • the operator terminal 20 commands the drone 81 to receive power at the power transmission unit 83 via the ad hoc communication system 89 while the position detection unit 87 is operating.
  • the drone 81 that has received the command approaches the power transmission unit 83 and receives power from the power transmission unit 83 while referring to the information received from the position detection unit 87.
  • the operator terminal 20 can connect the unmanned aircraft 81a to the other unmanned vehicles 81b to 81c via the ad hoc communication system 89 while the position detector 87 is operating.
  • Command to power The drone 81a that has received the command approaches the drones 81b to 81c equipped with the power receiving unit 84 while referring to information received from the position detection unit 87, and performs wireless power feeding from the wireless power transmission unit 83a.
  • the drone 81a may approach another electronic device such as a sensor and perform wireless power feeding.
  • FIG. 30A shows a wireless power feeding system 1000 according to the tenth embodiment.
  • the wireless power feeding system 1000 includes a drone 91.
  • the unmanned aircraft 91 includes an ad hoc communication system 99. Furthermore, although not shown, the ad hoc communication system 99 has an acoustic communication system.
  • a part or all of the unmanned aircraft 91a, 91b, 91c group including the plurality of unmanned aircraft 91 shown in FIG. 30A has a device for underwater movement, although not shown.
  • part or all of the power transmission unit 93 and the power reception unit 94 have a waterproof mechanism, although not shown.
  • the apparatus for underwater movement specifically refers to a screw for obtaining a propulsive force in water, a ground for adjusting buoyancy in water, and the like.
  • the acoustic communication system specifically refers to a communication system using a compression wave of about several kHz (kilohertz) to several MHz (megahertz).
  • the waterproof mechanism refers to resin sealing, packing fastening at the joint, and the like. Since other devices are the same as those in the first to seventh embodiments, the description thereof will be omitted.
  • some or all of the drones 91a to 91c are provided with a device such as a screw for moving in the water, so even if the environment is in an environment where water exists. Can move easily for power feeding and power receiving.
  • a device such as a screw for moving in the water
  • the ad hoc communication system 99 includes an acoustic communication system, it is possible to stably perform underwater communication that is difficult with wireless LAN technology or RFID technology.
  • all or part of the power transmission unit 93 and the power reception unit 94 includes a waterproof mechanism, deterioration and failure can be prevented.
  • the effect of the tenth embodiment of the present invention will be described.
  • this embodiment even in an aqueous environment where water or seawater exists, it is possible to efficiently move and communicate, and a waterproof mechanism is provided to suppress deterioration of the wireless power transmitting unit and the wireless power receiving unit. It becomes possible to do.
  • power can be supplied more reliably, there is little deterioration, and information can be collected efficiently.
  • the drones 91a to 91c can be easily moved for power supply or power reception using a screw or the like even in an environment where water is present.
  • the ad hoc communication system 99 includes an acoustic communication system and can stably perform underwater communication.
  • FIG. 31 A usage example of the tenth embodiment will be described.
  • a position detection unit 97 (not shown) is installed inside the nuclear reactor 970.
  • the drones 91a to 91b execute commands such as movement and information collection from the operator terminal 30 and exchange collected data using an ad hoc communication system or the like. Further, the drones 91a to 91c use the position information received from the position detection unit 97 to supply power from the power transmission unit 93 or receive the supplied electric power to the other unmanned machines 91a to 91c. Mutual transmission / reception is performed.
  • the effect of the usage example of the tenth embodiment of the present invention will be described.
  • Each of the power transmission means and the power reception means is A power transmission coil; Including inclusion means having a dielectric covering the power transmission coil, At least one of the power transmission unit and the power reception unit includes an impedance adjustment unit that adjusts its own impedance adjustment while adjusting the phase.
  • the wireless power supply apparatus according to appendix 1.
  • the inclusion means includes First inclusion means having a first dielectric covering the power transmission coil; A second inclusion means having a second dielectric covering the first inclusion means; The wireless power feeding apparatus according to appendix 1 or 2, including a covering unit having a third dielectric covering the second inclusion unit.
  • the system control means includes Data collection means for collecting data related to environmental variation of the good conductor medium and position variation of the power receiving means caused by the environmental variation; Data storage means for storing the collected data; Data prediction means for determining a parameter for predicting the environmental fluctuation and the position fluctuation from the collected data; and parameter control means for controlling the wireless power feeding based on the parameter;
  • the wireless power feeding system according to attachment 6.
  • the data collection means includes at least one sensor for collecting at least one kind of data relating to the good conductor medium, The data prediction means determines the parameter based on the at least one type of data; The wireless power feeding system according to appendix 6 or appendix 7.
  • An unmanned aerial vehicle comprising the power receiving means, capable of moving in the good conductor medium without a person boarding, Any one of appendix 6 to appendix 8, further comprising position detection means for detecting position information of the drone and the power transmission means, and notifying at least one of the drone and the power transmission means of the detected position information.
  • the wireless power feeding system according to item 1.
  • the power transmission means sends power wirelessly
  • the power receiving means receives power by receiving the wireless power transmitted from the power transmitting means
  • Data collection means collects data related to the environmental variation of the good conductor medium and the positional variation of the power receiving means caused by the environmental variation
  • a data storage means stores the collected data
  • data prediction means determines parameters for predicting the environmental variation and the positional variation
  • Parameter control means controls the wireless power feeding based on the parameters.
  • the wireless power feeding system according to any one of appendix 6 to appendix 9, wherein there are a plurality of the radios, and each of the radios communicates with each other using ad hoc communication means.
  • the drone includes means for moving in the good conductor medium;
  • the ad hoc communication means comprises acoustic communication means;

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

La présente invention concerne un dispositif d'alimentation électrique sans fil et similaire qui permettent d'obtenir une alimentation électrique sans fil stable, même dans les environnements sous-marins et similaires, y compris dans l'eau de mer. Ledit dispositif d'alimentation électrique sans fil (100) est doté d'une unité de transmission d'énergie (3) qui transmet par le réseau sans fil de l'énergie électrique par l'intermédiaire d'un support bon conducteur (5), d'une unité de réception d'énergie (4) qui reçoit l'énergie sans fil transmise par l'unité de transmission d'énergie (3), et d'une unité de commande de système (2) qui commande l'unité de transmission d'énergie (3) et l'unité de réception d'énergie (4). L'unité de commande de système (2) transfère l'énergie électrique par l'intermédiaire d'une résonance à une fréquence déterminée par l'impédance de l'unité de transmission d'énergie (3), l'impédance de l'unité de réception d'énergie (4) et l'impédance du support bon conducteur (5) tout en régulant sa phase.
PCT/JP2015/000892 2014-02-25 2015-02-24 Dispositif, système et procédé d'alimentation électrique sans fil WO2015129247A1 (fr)

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