JPWO2013001636A1 - Power transmission device, power reception device, and power transmission system - Google Patents

Abstract

A power transmission device (41) used in a power transmission system using electromagnetic field resonance, wherein a power transmission side electromagnetic induction coil (23), a power transmission side resonance unit (28), a power transmission side electromagnetic induction coil (23), and The power transmission side electromagnetic induction coil (23) and the power transmission side resonance section (28) are arranged in the same plane. The power transmission side shield section (51) surrounds the power transmission side resonance section (28).

Description

  The present invention relates to a power transmission device, a power reception device, and a power transmission system.

  In recent years, attention has been paid to hybrid vehicles, electric vehicles, and the like in which driving wheels are driven using electric power such as a battery in consideration of the environment.

  In particular, in recent years, in an electric vehicle equipped with a battery as described above, wireless charging capable of charging the battery in a contactless manner without using a plug or the like has attracted attention. Recently, various charging systems have been proposed for non-contact charging systems, and in particular, a technique for transmitting power in a non-contact manner by using a resonance phenomenon has been highlighted.

  Examples of the non-contact power transmission system using electromagnetic resonance include the systems described in JP 2010-070048, JP 2010-073976, and JP 2010-226946. This power transmission system includes, for example, a power transmission device provided on a vehicle placement surface (parking lot) on the power transmission side, and a power reception device provided on the power reception side. And between the power transmission apparatus and the power receiving apparatus, electric power is transmitted by electromagnetic resonance.

JP 2010-070048 A JP 2010-073976 A JP 2010-226946 A

  Here, the coils and the like included in the power transmission device and the power reception device are stacked and disposed along the direction in which the power transmission device and the power reception device face each other. Therefore, the power transmission device and the power reception device have a predetermined thickness in the coil stacking direction.

  For example, when a power transmission device is mounted on a vehicle mounting surface on which the vehicle passes, the power transmission device has a predetermined thickness, and thus the possibility of being stepped on by the vehicle or the like increases. Therefore, the power transmission device needs to be designed in consideration of load resistance.

  Further, when the power transmission device is placed on the vehicle placement surface, the power transmission device projects from the vehicle placement surface. Therefore, the power transmission device also needs to be designed to have a structure that does not hinder pedestrians and the like from walking.

  As described above, when the power transmission device is provided on the vehicle mounting surface, an advanced design technique is required for the power transmission device, and there is a concern about an increase in cost on the power transmission side. The same applies to the case where the power receiving device is provided on the vehicle placement surface.

  In addition, when a power receiving device is mounted on the vehicle side, advanced design technology for mounting a power receiving device having a predetermined thickness in the coil stacking direction is required in a limited vehicle space. There is a concern about the cost increase.

  The present invention has been made in view of the above-described problems, and an object thereof is to mount a power transmission device and a power reception device on a vehicle when designing a power transmission device and a power reception device used in a power transmission system. Provided are a power transmission device, a power reception device, and a power transmission system having a structure capable of facilitating the design and construction in the thickness direction of the power transmission device and the power reception device when mounted on a surface or mounted on a vehicle. There is to do.

  The power transmission device according to the present invention is a power transmission device used in a power transmission system using electromagnetic field resonance, wherein the power transmission side electromagnetic induction coil, the power transmission side resonance unit, the power transmission side electromagnetic induction coil, and the above The power transmission side electromagnetic induction coil and the power transmission side resonance section are arranged in the same plane.

  In another embodiment, the power transmission side resonance section has a power transmission side resonance coil, and the power transmission side electromagnetic induction coil and the power transmission side resonance coil are arranged in the same plane.

  In another embodiment, the power transmission side resonance coil is disposed inside the power transmission side electromagnetic induction coil.

  In another embodiment, the power transmission device is provided on a vehicle placement surface, and the power transmission side electromagnetic induction coil, the power transmission side resonance coil, and the power transmission side shield portion are embedded below the vehicle placement surface. ing.

  In another form, it has the some groove | channel recessed from the said vehicle mounting surface, The said power transmission side electromagnetic induction coil, the said power transmission side resonance coil, and the said power transmission side shield part are each arrange | positioned at the said groove | channel. .

  In another form, the said vehicle mounting surface is the surface of the parking lot which has the reinforcement member embed | buried under the underground, and the said power transmission side shield part is connected to the said reinforcement member.

  The power receiving device according to the present invention is a power receiving device used in a power transmission system using electromagnetic field resonance, the power receiving side electromagnetic induction coil, the power receiving side resonance unit, the power receiving side electromagnetic induction coil, and the above A power receiving side shield part surrounding the power receiving side resonance part, and the power receiving side electromagnetic induction coil and the power receiving side resonance part are arranged in the same plane.

  In another embodiment, the power reception side resonance section includes a power reception side resonance coil, and the power reception side electromagnetic induction coil and the power reception side resonance coil are arranged in the same plane.

  In another embodiment, the power reception side resonance coil is disposed inside the power reception side electromagnetic induction coil.

  The power transmission system according to the present invention is a power transmission system including a power transmission device and a power reception device, the power transmission device including a power transmission side electromagnetic induction coil, a power transmission side resonance unit, the power transmission side electromagnetic induction coil, and A power transmission side shield part surrounding the power transmission side resonance part, and the power reception device includes a power reception side electromagnetic induction coil, a power reception side resonance part that resonates with the power transmission side resonance part by an electromagnetic field, and the power reception side electromagnetic induction. A power receiving side shield part surrounding the coil and the power receiving side resonance part.

The power transmission side electromagnetic induction coil and the power transmission side resonance section are arranged in the same plane.
In another embodiment, the power transmission side resonance unit has a power transmission side resonance coil, and the power transmission side electromagnetic induction coil and the power transmission side resonance coil are arranged in the same plane.

  In another embodiment, the power transmission side resonance coil is disposed inside the power transmission side electromagnetic induction coil.

  In another embodiment, the power transmission device is provided on a vehicle placement surface, and the power transmission side electromagnetic induction coil, the power transmission side resonance coil, and the power transmission side shield portion are embedded below the vehicle placement surface. ing.

  In another form, it has a plurality of grooves recessed from the vehicle mounting surface, and the power transmission side electromagnetic induction coil, the power transmission side resonance coil, and the power transmission side shield part are respectively disposed in the grooves. Yes.

  In another form, the said vehicle mounting surface is the surface of the parking lot which has the reinforcement member embed | buried under the underground, and the said power transmission side shield part is connected to the said reinforcement member.

  In another aspect of the power transmission system according to the present invention, the power transmission system includes a power transmission device and a power reception device, the power transmission device including a power transmission side electromagnetic induction coil, a power transmission side resonance unit, and the power transmission side. A power transmission side shield part surrounding the electromagnetic induction coil and the power transmission side resonance part, and the power reception device includes a power reception side electromagnetic induction coil, power reception side resonance that resonates with the power transmission side resonance part and an electromagnetic field, and the power reception. A power reception side shield part surrounding the power reception side resonance part and the power reception side resonance part, and the power reception side electromagnetic induction coil and the power reception side resonance part are arranged in the same plane.

  In another embodiment, the power reception side resonance section includes a power reception side resonance coil, and the power reception side electromagnetic induction coil and the power reception side resonance coil are arranged in the same plane.

  In another embodiment, the power reception side resonance coil is disposed inside the power reception side electromagnetic induction coil.

  In still another aspect of the power transmission system according to the present invention, the power transmission system includes a power transmission device and a power reception device, the power transmission device including a power transmission side electromagnetic induction coil, a power transmission side resonance unit, and the power transmission A power-receiving-side electromagnetic induction coil and a power-receiving-side resonance part that resonates with the power-transmission-side resonance part and an electromagnetic field. A power receiving side electromagnetic induction coil and a power receiving side shield part surrounding the power receiving side resonance part, wherein the power transmission side electromagnetic induction coil and the power transmission side resonance part are arranged in the same plane, and the power receiving side electromagnetic induction coil The power receiving side resonance part is arranged in the same plane.

  In another aspect, the power transmission side resonance unit includes a power transmission side resonance coil, the power transmission side electromagnetic induction coil and the power transmission side resonance coil are arranged in the same plane, and the power reception side resonance unit is configured to receive power. The power receiving side electromagnetic induction coil and the power receiving side resonance coil are arranged in the same plane.

  In another embodiment, the power transmission side resonance coil is arranged inside the power transmission side electromagnetic induction coil, and the power reception side resonance coil is arranged inside the power reception side electromagnetic induction coil.

  According to the present invention, when designing a power transmitting device and a power receiving device used in a power transmission system, the power transmitting device when the power transmitting device and the power receiving device are mounted on the vehicle mounting surface or when mounted on the vehicle. In addition, design and construction in the thickness direction of the power receiving device can be facilitated.

It is a figure which shows typically the power transmission apparatus, power receiving apparatus, and electric power transmission system in embodiment. It is a schematic diagram for demonstrating the principle of power transmission and power reception by a resonance method. It is the figure which showed the relationship between the distance from an electric current source (magnetic current source), and the intensity | strength of an electromagnetic field. It is a model side view of the vehicle mounted on a vehicle mounting surface, and the power transmission apparatus (power receiving apparatus) embed | buried under a vehicle mounting surface. It is a top view which shows schematic structure of the power transmission apparatus (power receiving apparatus) in embodiment. FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 5. It is sectional drawing which shows the cooling structure of the power transmission apparatus (power receiving apparatus) in embodiment. It is a top view which shows schematic structure of the power transmission apparatus (power receiving apparatus) which has another form in embodiment. It is a top view which shows schematic structure of the power transmission apparatus (power receiving apparatus) which has another form in embodiment. It is a top view which shows schematic structure of the power transmission apparatus (power receiving apparatus) which has another form in embodiment. It is a model side view of the vehicle mounted on a vehicle mounting surface, and the power transmission apparatus (power receiving apparatus) mounted on a vehicle mounting surface. It is the schematic which shows the state which mounted the power transmission apparatus in the vehicle in embodiment, and mounted the power receiving apparatus on the vehicle mounting surface.

  Hereinafter, a power transmission device, a power reception device, and a power transmission system according to an embodiment of the present invention will be described with reference to the drawings. In each embodiment described below, when referring to the number, amount, and the like, the scope of the present invention is not necessarily limited to the number, amount, and the like unless otherwise specified. The same parts and corresponding parts are denoted by the same reference numerals, and redundant description may not be repeated. In addition, it is planned from the beginning to use the configurations in the embodiments in appropriate combinations.

  First, a power transmission device, a power reception device, and a power transmission system according to an embodiment of the present invention will be described with reference to FIGS. 1 is a diagram schematically illustrating a power transmission device, a power reception device, and a power transmission system, FIG. 2 is a schematic diagram for explaining the principle of power transmission and power reception by a resonance method, and FIG. 3 is a current source (magnetic field). It is the figure which showed the relationship between the distance from a flow source), and the intensity | strength of an electromagnetic field.

  As shown in FIG. 1, the power transmission system in the embodiment includes an electric vehicle 10 including a power receiving device 40 and an external power feeding device 20 including a power transmitting device 41. The power receiving device 40 of the electric vehicle 10 stops at a predetermined position in a parking space having a vehicle placement surface 42 on which the power transmitting device 41 is provided, and mainly receives power from the power transmitting device 41. The external power feeding device 20 is embedded in a parking space having a vehicle placement surface 42.

  The vehicle mounting surface 42 is provided with a wheel stop and a line so that the electric vehicle 10 stops at a predetermined position.

  The external power supply device 20 includes a high frequency power driver 22 connected to the AC power source 21, a control unit 26 that controls driving of the high frequency power driver 22, and a power transmission device 41 connected to the high frequency power driver 22.

  The power transmission device 41 includes a power transmission side resonance unit 28 and a power transmission side electromagnetic induction coil 23. The power transmission resonance unit 28 includes a power transmission resonance coil 24 and a power transmission capacitor 25 connected to the power transmission resonance coil 24. The power transmission side electromagnetic induction coil 23 is electrically connected to the high frequency power driver 22.

  The power transmission device 41 is surrounded by a power transmission side shield portion 51 that shields an electromagnetic field generated from the power transmission side electromagnetic induction coil 23 and the power transmission side resonance coil 24. In addition, in the example shown in FIG. 1, although the power transmission side capacitor 25 is provided, the power transmission side capacitor 25 is not necessarily an essential structure.

  AC power supply 21 is a power supply external to the vehicle, for example, a system power supply. The high frequency power driver 22 converts power received from the AC power source 21 into high frequency power, and supplies the converted high frequency power to the power transmission side electromagnetic induction coil 23. Note that the frequency of the high-frequency power generated by the high-frequency power driver 22 is, for example, 1 M to several tens of MHz.

  By supplying the high frequency power to the power transmission side electromagnetic induction coil 23, the amount of magnetic flux generated from the power transmission side electromagnetic induction coil 23 changes with time.

  The power transmission side resonance coil 24 is electromagnetically coupled to the power transmission side electromagnetic induction coil 23. When the amount of magnetic flux from the power transmission side resonance coil 24 changes, a high frequency current is also supplied to the power transmission side resonance coil 24 by electromagnetic induction. Flowing.

  At this time, the frequency of the high-frequency current flowing through the power transmission side resonance coil 24, the reactance of the power transmission side electromagnetic induction coil 23, the resonance frequency determined by the capacity of the power transmission side capacitor 25 and the self capacity of the power transmission side resonance coil 24 are substantially equal. A current is supplied to the power transmission side electromagnetic induction coil 23 so as to match the above. The power transmission side resonance coil 24 and the power transmission side capacitor 25 function as a series LC resonator (resonance unit).

  An electric field and a magnetic field having substantially the same frequency as the resonance frequency are formed around the power transmission resonance coil 24. In this manner, an electromagnetic field (electromagnetic field) having a predetermined frequency is formed around the power transmission resonance coil 24.

  The electric vehicle 10 includes a power receiving device 40, a rectifier 13 connected to the power receiving device 40, a DC / DC converter 14 connected to the rectifier 13, a battery 15 connected to the DC / DC converter 14, and power control. A unit (PCU (Power Control Unit)) 16, a motor unit 17 connected to the power control unit 16, and a vehicle ECU (Electronic Control Unit) 18 that controls driving of the DC / DC converter 14, the power control unit 16, etc. With.

  Electric vehicle 10 in the present embodiment is a hybrid vehicle including an engine (not shown), but includes an electric vehicle and a fuel cell vehicle as long as the vehicle is driven by a motor.

  The power receiving device 40 includes a power receiving side resonance unit 27 and a power receiving side electromagnetic induction coil 12, and the power receiving side resonance unit 27 includes a power receiving side resonance coil 11 and a power receiving side capacitor 19. The power reception side resonance unit 27 is a series LC resonator formed by the power reception side resonance coil 11 and the power reception side capacitor 19. The resonance frequency of the power reception side resonance unit 27 and the resonance frequency of the power transmission side resonance unit 28 substantially match. The power receiving device 40 is surrounded by a power receiving side shield portion 50 that shields an electromagnetic field generated from the power receiving side resonance coil 11 and the power receiving side electromagnetic induction coil 12.

  When an alternating current having a resonance frequency flows through the power transmission side resonance unit 28, an electromagnetic field is formed around the power transmission side resonance coil 24 of the power transmission side resonance unit 28. Since the power receiving resonance coil 11 is disposed within a predetermined range from the power transmission resonance coil 24, a current flows in the power receiving resonance coil 11 by the electromagnetic field.

  Since the resonance frequency of the power transmission side resonance unit 28 and the resonance frequency of the power reception side resonance unit 27 substantially coincide with each other, power is supplied to the power reception side resonance coil 11 satisfactorily. Thus, the power reception side resonance unit 27 and the power transmission side resonance unit 28 resonate with the electromagnetic field, and the power reception side resonance coil 11 receives power. The power receiving resonance coil 11 is disposed in the near field (evanescent field) of the electromagnetic field formed around the power transmission resonance coil 24, and receives power efficiently. The details of the wireless power transmission / reception method using the electromagnetic resonance method will be described later.

  The power reception side electromagnetic induction coil 12 is electromagnetically coupled to the power reception side resonance coil 11 to take out the electric power received by the power reception side resonance coil 11. The power receiving side electromagnetic induction coil 12 sequentially extracts power from the power receiving side resonance coil 11, so that power is sequentially supplied from the power transmission side resonance coil 24 to the power receiving side resonance coil 11 via the electromagnetic field. Thus, the power receiving device 40 and the power transmitting device 41 employ a so-called electromagnetic resonance wireless power transmission / reception method.

  The rectifier 13 is connected to the power reception side electromagnetic induction coil 12, converts the alternating current supplied from the power reception side electromagnetic induction coil 12 into a direct current, and supplies the direct current to the DC / DC converter 14.

  The DC / DC converter 14 adjusts the voltage of the direct current supplied from the rectifier 13 and supplies it to the battery 15. The DC / DC converter 14 is not an essential component and may be omitted. In this case, the DC / DC converter 14 can be substituted by providing a matching unit for matching impedance in the external power supply device 20.

  The power control unit 16 includes a converter connected to the battery 15 and an inverter connected to the converter, and the converter adjusts (boosts) a direct current supplied from the battery 15 and supplies it to the inverter. The inverter converts the direct current supplied from the converter into an alternating current and supplies it to the motor unit 17.

  The motor unit 17 employs, for example, a three-phase AC motor and is driven by an AC current supplied from an inverter of the power control unit 16.

  When the electric vehicle 10 is a hybrid vehicle, the electric vehicle 10 further includes an engine and a power split mechanism, and the motor unit 17 mainly functions as a motor generator that functions mainly as a generator and an electric motor. Including a motor generator.

  As described above, between the power receiving device 40 and the power transmitting device 41 according to the present embodiment is a wireless power transmission / power receiving method, and a resonance method using an electromagnetic field is adopted, and the power transmitting device 41 and the power receiving device 40 are They are resonating with each other by an electromagnetic field. Here, “resonate by an electromagnetic field” is a concept including both a case of resonating by a magnetic field and a case of resonating by an electric field. In the present embodiment, an example in which the power receiving device 40 and the power transmitting device 41 are resonating mainly by a magnetic field will be described, but the present invention naturally includes a case of resonating by an electric field.

  FIG. 2 is a schematic diagram for explaining the principle of power transmission and power reception by the resonance method. The principle of power transmission and power reception by the resonance method will be described with reference to FIG.

  Referring to FIG. 2, in this resonance method, in the same way as two tuning forks resonate, two LC resonance coils having the same natural frequency resonate in an electromagnetic field (near field), and thereby, from one coil. Electric power is transmitted to the other coil via an electromagnetic field.

  Specifically, the primary coil 32 is connected to the high-frequency power source 31, and high-frequency power of 1 M to several tens of MHz is supplied to the primary resonance coil 33 that is magnetically coupled to the primary coil 32 by electromagnetic induction. The primary resonance coil 33 is a series LC resonator based on the inductance of the coil itself and stray capacitance (including the capacitance of the capacitor when a capacitor is connected to the coil), and has the same resonance frequency as the primary resonance coil 33. Resonates with the secondary resonance coil 34 via an electromagnetic field (near field). Then, energy (electric power) moves from the primary resonance coil 33 to the secondary resonance coil 34 via the electromagnetic field. The energy (electric power) moved to the secondary resonance coil 34 is taken out by the secondary coil 35 magnetically coupled to the secondary resonance coil 34 by electromagnetic induction and supplied to the load 36. Note that power transmission by the resonance method is realized when the Q value indicating the resonance intensity between the primary resonance coil 33 and the secondary resonance coil 34 is larger than 100, for example.

  2 and the configuration shown in FIG. 1, the AC power supply 21 and the high-frequency power driver 22 shown in FIG. 1 correspond to the high-frequency power supply 31 shown in FIG. Further, the power transmission side electromagnetic induction coil 23 shown in FIG. 1 corresponds to the primary coil 32 of FIG. Further, the power transmission side resonance coil 24 and the power transmission side capacitor 25 shown in FIG. 1 correspond to the primary resonance coil 33 and the stray capacitance of the primary resonance coil 33 in FIG.

  The power receiving side resonance coil 11 and the power receiving side capacitor 19 shown in FIG. 1 correspond to the secondary resonance coil 34 and the stray capacitance of the secondary resonance coil 34 shown in FIG.

  The power receiving side electromagnetic induction coil 12 shown in FIG. 1 corresponds to the secondary coil 35 of FIG. The rectifier 13, the DC / DC converter 14 and the battery 15 shown in FIG. 1 correspond to the load 36 shown in FIG.

  Furthermore, the wireless power transmission / reception system in the present embodiment uses a near field (evanescent field) in which the “electrostatic field” of the electromagnetic field is dominant to improve power transmission and power reception efficiency.

  FIG. 3 is a diagram showing the relationship between the distance from the current source (magnetic current source) and the intensity of the electromagnetic field. Referring to FIG. 3, the electromagnetic field is composed of three components. A curve k1 is a component inversely proportional to the distance from the wave source, and is referred to as a “radiating electric field”. A curve k2 is a component inversely proportional to the square of the distance from the wave source, and is referred to as an “induced electric field”. The curve k3 is a component that is inversely proportional to the cube of the distance from the wave source, and is referred to as an “electrostatic field”.

  The “electrostatic field” is a region where the intensity of the electromagnetic wave suddenly decreases with the distance from the wave source. In the resonance method, energy (electric power) is utilized using the near field (evanescent field) in which this “electrostatic field” is dominant. Is transmitted. That is, by resonating a pair of resonators having the same natural frequency (for example, a pair of LC resonance coils) in a near field where the “electrostatic field” is dominant, the resonance from one resonator (primary resonance coil) to the other Energy (electric power) is transmitted to the resonator (secondary resonance coil). Since this “electrostatic field” does not propagate energy far away, the resonance method can transmit power with less energy loss than electromagnetic waves that transmit energy (electric power) by “radiant electric field” that propagates energy far away. it can.

  As described above, the electric vehicle 10 and the external power supply device 20 according to the present embodiment use the near-field resonance of the electromagnetic field to receive the power reception device 40 of the electric vehicle 10 and the power transmission device 41 of the external power supply device 20. Power transmission and reception.

(Specific configuration of power transmission device 41)
Next, a specific configuration of power transmission device 41 in the present embodiment will be described with reference to FIGS. 4 to 6. 4 is a schematic side view of a vehicle placed on the vehicle placement surface and a power transmission device embedded in the vehicle placement surface, FIG. 5 is a plan view showing a schematic configuration of the power transmission device, and FIG. FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 5. The numbers in parentheses in the figure are diagrams showing the reference numbers of each device when the power receiving device 40 is embedded below the vehicle mounting surface 42, and will be described in detail later. The same applies to FIGS.

  As shown in FIG. 4, power transmission device 41 </ b> A in the present embodiment is embedded below vehicle mounting surface 42 of the parking space where electric vehicle 10 is mounted.

  As shown in FIGS. 5 and 6, the power transmission device 41 </ b> A in the present embodiment includes an annular power transmission side resonance coil 24 and an annular power transmission side electromagnetic induction provided so as to surround the power transmission side resonance coil 24. A coil 23 and an annular power transmission side shield 51 provided so as to surround the outside of the power transmission side electromagnetic induction coil 23 are included.

  A power transmission side capacitor 25 is connected to the power transmission side resonance coil 24, and the power transmission side resonance coil 24 and the power transmission side capacitor 25 constitute a power transmission side resonance unit 28.

  Here, since the inductance value (L value) decreases when the distance between the power transmission side resonance coil 24 and the power transmission side shield 51 decreases, the number of turns and the diameter of the power transmission side resonance coil 24 are maintained in order to maintain the resonance frequency. However, if the number of turns is increased or the diameter is increased, the apparatus becomes larger.

  Therefore, as shown in FIG. 5, the power transmission side resonance coil 24 is disposed on the inner side, the power transmission side electromagnetic induction coil 23 is disposed on the outer side, and the distance between the power transmission side resonance coil 24 and the power transmission side shield unit 51 is increased. It is possible to reduce the size of the apparatus by reducing the fluctuation effect of the inductance value (L value) due to the distance between the shield part 51 and the power transmission resonance coil 24.

  Further, by arranging the power transmission side electromagnetic induction coil 23 between the power transmission side resonance coil 24 and the power transmission side shield portion 51, the installation space can be effectively used, and the power line for supplying power to the power transmission side electromagnetic induction coil 23 can be used. Routing is also easy.

  Further, by arranging the power transmission side resonance coil 24 inside the power transmission side electromagnetic induction coil 23, components of the power transmission side capacitor 25 (capacitor and the like) connected to the power transmission side resonance coil 24 are arranged on the inner peripheral side of the power transmission side resonance coil 24. It can be arranged in a space, and the apparatus can be miniaturized.

  In addition, when it is not necessary to consider the enlargement of the apparatus and the arrangement of the power line that supplies power to the power transmission side electromagnetic induction coil 23, the power transmission side resonance coil 24 is disposed outside the power transmission side electromagnetic induction coil 23. It is also possible to adopt a configuration that does this.

  Moreover, in order to enhance the shielding effect by the power transmission side shield part 51, the power transmission side shield part 51 is connected to the reinforcing member 55 of the parking lot embedded in the underground. By giving a shielding effect to the reinforcing member 55 of the parking lot, it is not necessary to provide a large separate shield part, and the large-diameter power transmission side electromagnetic induction coil 23 and power transmission side resonance coil 24 can be used at low cost. It becomes possible. When the shielding effect by the power transmission side shield part 51 is sufficient, it is not necessary to connect the power transmission side shield part 51 to the reinforcing member 55.

  In the present embodiment, the parking space is made of concrete, and grooves 23m, 24m, and 51m that are recessed downward are provided on the surface of the vehicle placement surface 42. The groove 23m houses the power transmission side electromagnetic induction coil 23. The groove 24m accommodates the power transmission resonance coil 24. The groove 51m houses the power transmission shield 51. Thus, by providing the grooves 23m and 24m for accommodating the power transmission side electromagnetic induction coil 23 and the power transmission side resonance coil 24, a bobbin for winding the power transmission side electromagnetic induction coil 23 and the power transmission side resonance coil 24 becomes unnecessary.

  As described above, the power transmission side electromagnetic induction coil 23, the power transmission side resonance coil 24, and the power transmission side shield 51 are accommodated in each of the grooves 23m, 24m, and 51m, so that the power transmission side electromagnetic induction coil 23 and the power transmission side resonance are accommodated. The coil 24 and the power transmission side shield part 51 can be easily arranged in the same plane.

  In the present embodiment, the power transmission side electromagnetic induction coil 23, the power transmission side resonance coil 24, and the power transmission side shield portion 51 are made of conductive wires having the same cross-sectional shape. The upper surface positions of the side resonance coil 24 and the power transmission side shield portion 51 are located in the same plane, and the bottom surface positions of the power transmission side electromagnetic induction coil 23, the power transmission side resonance coil 24, and the power transmission side shield portion 51 are also within the same plane. Will be located.

  In this embodiment, being located in the same plane means that, when viewed in a plan view, the power transmission side electromagnetic induction coil 23 and the power transmission side resonance coil 24 do not overlap each other but are spread out in the plane direction. Means state.

  When rectangular materials having different cross-sectional shapes are used for the power transmission side electromagnetic induction coil 23, the power transmission side resonance coil 24, and the power transmission side shield 51, the power transmission side electromagnetic induction coil 23, the power transmission side resonance coil 24, and the power transmission side shield are used. The upper surface position of the part 51 is preferably located in the same plane, but the lower surface positions of the power transmission side electromagnetic induction coil 23, the power transmission side resonance coil 24, and the power transmission side shield part 51 may be located in the same plane. Absent.

  Further, in the case where a wire having a circular cross section is used for the power transmission side electromagnetic induction coil 23, the power transmission side resonance coil 24, and the power transmission side shield 51, the power transmission side electromagnetic induction coil 23, the power transmission side resonance coil 24, and the power transmission The upper end position of the side shield part 51 is preferably located in the same plane, but the lower end positions of the power transmission side electromagnetic induction coil 23, the power transmission side resonance coil 24, and the power transmission side shield part 51 are located in the same plane. It doesn't matter.

  Since the power transmission side shield part 51 does not generate heat, the power transmission side shield part 51 is exposed to the surface or the whole structure of the power transmission side shield part 51 is embedded. There is no need to take measures for heat dissipation with respect to the side shield portion 51.

  On the other hand, since the power transmission side electromagnetic induction coil 23 and the power transmission side resonance coil 24 generate heat, it is preferable to adopt a structure that promotes heat dissipation. Therefore, as shown in FIG. 6, it is preferable to embed under the vehicle mounting surface 42 so that the surfaces of the power transmission side electromagnetic induction coil 23 and the power transmission side resonance coil 24 are exposed.

  In some cases, it is necessary to bury the power transmission side electromagnetic induction coil 23 and the power transmission side resonance coil 24 below the vehicle mounting surface 42 so that the surfaces are not exposed. In such a case, as shown in FIG. 7, grooves 23m and 24m in which the power transmission side electromagnetic induction coil 23 and the power transmission side resonance coil 24 are completely accommodated are provided, and a concrete lid 23c that closes the grooves 23m and 24m. 24c may be provided. Furthermore, in order to promote heat dissipation from the power transmission side electromagnetic induction coil 23 and the power transmission side resonance coil 24, the cooling device 70 may be provided inside the grooves 23m and 24m.

  As an example of the cooling device 70, the cooling pipe 71 may be disposed on both sides of the power transmission side electromagnetic induction coil 23 and the power transmission side resonance coil 24, and the refrigerant 72 may be passed through the cooling pipe 71. Thereby, the power transmission side electromagnetic induction coil 23 and the power transmission side resonance coil 24 can be efficiently cooled. Further, heat is recovered from the refrigerant 72, and the recovered heat can be effectively used (for example, power generation, heat exchange, etc.).

  As shown in FIG. 5, as a form of the power transmission side electromagnetic induction coil 23, the power transmission side resonance coil 24, and the power transmission side shield part 51, a case where an annular form is adopted when viewed in a plan view is shown. It is not limited to this form.

  For example, as in the power transmission device 41B shown in FIG. 8, a rectangular form is adopted as a form of the power transmission side electromagnetic induction coil 23, the power transmission side resonance coil 24, and the power transmission side shield part 51 in a plan view. May be. The section taken along line VI-VI in FIG. 8 is the same as the section shown in FIG.

  Further, as another form, the power transmission side electromagnetic induction coil 23 is not provided so as to surround the power transmission side resonance coil 24 as in the power transmission device 41C shown in FIG. 23 and the power transmission side resonance coil 24 are arranged in an independent ring form, and a rectangular power transmission side shield portion 51 is provided so as to surround the power transmission side electromagnetic induction coil 23 and the power transmission side resonance coil 24. It is also possible to do. In this case, the power transmission side shield part 51 may have an annular shape.

  Further, like the power transmission device 41D shown in FIG. 10, the power transmission side electromagnetic induction coil 23 and the power transmission side resonance coil 24 are arranged in independent rectangular shapes, and the power transmission side electromagnetic induction coil 23 and the power transmission side resonance coil 24 are arranged. It is also possible to adopt a form in which a rectangular power transmission side shield part 51 is provided so as to surround. In this case, the power transmission side shield part 51 may have an annular shape.

  In addition, although the case where a cyclic | annular coil was used for the receiving side resonance coil 11 and the power transmission side resonance coil 24 was demonstrated, a form is not limited to a cyclic | annular coil, For example, the thing of a rod-shaped form and a fishbone form is also included. Can be applied.

  Thus, in this Embodiment, the power transmission side electromagnetic induction coil 23, the power transmission side resonance coil 24, and the power transmission side shield part 51 are each provided in the grooves 23m, 24m, The structure accommodated in 51m is employ | adopted.

  Thereby, the power transmission side electromagnetic induction coil 23, the power transmission side resonance coil 24, and the power transmission side shield part 51 can be easily installed on the vehicle placement surface 42 of the parking space in the same plane. As a result, a shield box, which has been conventionally required, becomes unnecessary.

  In addition, the physique of the power transmission device 41, particularly the physique in the height direction can be reduced. Further, when the power transmission device used in the power transmission system is provided on the vehicle mounting surface, the grooves 23m, 24m, 51m can be formed on the vehicle mounting surface simultaneously with the design of the parking lot, and the grooves 23m, 24m can be formed. , 51m, the power transmission side electromagnetic induction coil 23, the power transmission side resonance coil 24, and the conductors constituting the power transmission side shield portion 51 can be disposed, so that the design and construction of the power transmission device can be facilitated. .

  Moreover, since the power transmission side electromagnetic induction coil 23, the power transmission side resonance coil 24, and the power transmission side shield part 51 are accommodated in the grooves 23m, 24m, and 51m, the power transmission side electromagnetic induction when the vehicle passes through. The load of the load to the coil 23, the power transmission side resonance coil 24, and the power transmission side shield part 51 can also be disperse | distributed.

  In the above-described embodiment, a case where the power transmission device 41 having the power transmission side electromagnetic induction coil 23, the power transmission side resonance coil 24, and the power transmission side shield portion 51 is embedded below the vehicle placement surface 42 of the parking space will be described. However, as shown in FIG. 11, it is possible to employ a configuration in which the power transmission device 41 is placed on the vehicle placement surface 42.

  Even in this case, the power transmission device 41 according to the present embodiment can reduce the physique particularly in the height direction. Therefore, the design considering the load resistance when the vehicle is stepped on, the pedestrian, etc. It is also easy to design a structure that does not interfere with walking.

  Furthermore, although the case where the power transmission device 41 is provided on the vehicle placement surface 42 of the parking space has been described in the above embodiment, the electric vehicle 10 side has the function of the power transmission device 41 as shown in FIG. Even when the surface 42 side has the function of the power receiving device 40, the configuration described in the above embodiment is adopted for the power receiving device 40 on the vehicle mounting surface 42 side, so that The effect similar to the power transmission apparatus 41 in a form can be enjoyed. The numbers in parentheses shown in FIGS. 5 to 10 indicate the reference numbers of the respective devices when the function of the power receiving device 40 is provided on the vehicle mounting surface 42 side.

  Referring again to FIG. 1, the power reception side resonance coil 11 and the power reception side electromagnetic induction coil 12 employed on the power reception device 40 side mounted on the vehicle 10 are shown in FIG. 5, FIG. 8, FIG. 9, and FIG. As shown in the description using 10, it is possible to adopt a configuration in which they are arranged in the same plane. Thereby, it becomes possible to make the physique of the power receiving apparatus 40 in the height direction small.

  The numbers in parentheses shown in FIG. 5, FIG. 8, FIG. 9 and FIG. 10 are reference numbers of each device when the function of the power receiving device 40 is provided on the vehicle mounting surface 42 side. It is not only the reference number of each device of the power receiving side resonance coil 11, the power receiving side electromagnetic induction coil 12, and the power receiving side shield part 50 in a state where the power receiving device 40 is mounted on the vehicle 10 side.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  The present invention can be applied to a power transmission device, a power reception device, and a power transmission system.

  DESCRIPTION OF SYMBOLS 10 Electric vehicle, 11 Power receiving side resonance coil, 12 Power receiving side electromagnetic induction coil, 13 Rectifier, 14 Converter, 15 Battery, 16 Power control unit, 17 Motor unit, 19 Power receiving side capacitor, 20 External power supply device, 21 AC power supply, 22 High-frequency power driver, 23 power transmission side electromagnetic induction coil, 23c, 24c lid, 23m, 24m, 51m groove, 24 power transmission side resonance coil, 25 power transmission side capacitor, 26 control unit, 27 power reception side resonance unit, 28 power transmission side resonance unit, 31 High frequency power supply, 32 Primary coil, 33 Primary resonance coil, 34 Secondary resonance coil, 35 Secondary coil, 36 Load, 40, 40A, 40B, 40C, 40D Power receiving device, 41, 41A, 41B, 41C, 41D Power transmission device , 42 Vehicle mounting surface, 50 Power receiving side shield part, 5 Power-transmission-side shield part, 55 reinforcing member, 70 a cooling device, 71 a cooling pipe, 72 refrigerant.

Claims (21)

A power transmission device (41) used in a power transmission system using electromagnetic field resonance,
A power transmission side electromagnetic induction coil (23);
A power transmission resonance unit (28);
A power transmission side shield part (51) surrounding the power transmission side electromagnetic induction coil (23) and the power transmission side resonance part (28),
The power transmission device, wherein the power transmission side electromagnetic induction coil (23) and the power transmission side resonance section (28) are arranged in the same plane. The power transmission resonance unit (28) includes a power transmission resonance coil (24).
The power transmission device according to claim 1, wherein the power transmission side electromagnetic induction coil (23) and the power transmission side resonance coil (24) are arranged in the same plane.   The power transmission device according to claim 2, wherein the power transmission side resonance coil (24) is disposed inside the power transmission side electromagnetic induction coil (23). The power transmission device is provided on the vehicle placement surface (42),
The said power transmission side electromagnetic induction coil (23), the said power transmission side resonance coil (24), and the said power transmission side shield part (51) are embed | buried below from the said vehicle mounting surface (42). Power transmission equipment. A plurality of grooves (23m, 24m, 51m) recessed from the vehicle placement surface (42);
The said power transmission side electromagnetic induction coil (23), the said power transmission side resonance coil (24), and the said power transmission side shield part (51) are each arrange | positioned in the said groove | channel (23m, 24m, 51m). The power transmission device described in 1. The vehicle mounting surface (42) is a parking lot surface (42) having a reinforcing member (55) embedded in the ground,
The power transmission device according to claim 4, wherein the power transmission side shield part (51) is connected to the reinforcing member (55). A power receiving device (40) used in a power transmission system using electromagnetic field resonance,
A power receiving side electromagnetic induction coil (12);
A power receiving resonance part (27);
A power receiving side shield part (51) surrounding the power receiving side electromagnetic induction coil (12) and the power receiving side resonance part (27),
The power receiving device, wherein the power receiving side electromagnetic induction coil (12) and the power receiving side resonance portion (27) are arranged in the same plane. The power reception side resonance section (27) includes a power reception side resonance coil (11),
The power receiving device according to claim 7, wherein the power receiving side electromagnetic induction coil (12) and the power receiving side resonance coil (11) are arranged in the same plane.   The power receiving device according to claim 8, wherein the power receiving side resonance coil (11) is disposed inside the power receiving side electromagnetic induction coil (12). A power transmission system including a power transmission device (41) and a power reception device (40),
The power transmission device (41)
A power transmission side electromagnetic induction coil (23);
A power transmission resonance unit (28);
A power transmission side shield part (51) surrounding the power transmission side electromagnetic induction coil (23) and the power transmission side resonance part (28),
The power receiving device (40)
A power receiving side electromagnetic induction coil (12);
A power receiving side resonance part (27) resonating with the power transmission side resonance part (28) by an electromagnetic field;
A power receiving side shield part (50) surrounding the power receiving side electromagnetic induction coil (12) and the power receiving side resonance part (27),
The power transmission system, wherein the power transmission side electromagnetic induction coil (23) and the power transmission side resonance section (28) are arranged in the same plane. The power transmission resonance unit (28) includes a power transmission resonance coil (24).
The power transmission system according to claim 10, wherein the power transmission side electromagnetic induction coil (23) and the power transmission side resonance coil (24) are arranged in the same plane.   The power transmission system according to claim 11, wherein the power transmission side resonance coil (24) is disposed inside the power transmission side electromagnetic induction coil (23). The power transmission device is provided on the vehicle placement surface (42),
The said power transmission side electromagnetic induction coil (23), the said power transmission side resonance coil (24), and the said power transmission side shield part (51) are embed | buried below from the said vehicle mounting surface (42). The power transmission system described. A plurality of grooves (23m, 24m, 51m) recessed from the vehicle placement surface (42);
The said power transmission side electromagnetic induction coil (23), the said power transmission side resonance coil (24), and the said power transmission side shield part (51) are each arrange | positioned in the said groove | channel (23m, 24m, 51m). The power transmission system described in 1. The vehicle mounting surface (42) is a parking lot surface (42) having a reinforcing member (55) embedded in the ground,
The power transmission system according to claim 13, wherein the power transmission side shield part (51) is connected to the reinforcing member (55). A power transmission system including a power transmission device (41) and a power reception device (40),
The power transmission device (41)
A power transmission side electromagnetic induction coil (23);
A power transmission resonance unit (28);
A power transmission side shield part (51) surrounding the power transmission side electromagnetic induction coil (23) and the power transmission side resonance part (28),
The power receiving device (40)
A power receiving side electromagnetic induction coil (12);
A power receiving side resonance part (27) resonating with the power transmission side resonance part (28) by an electromagnetic field;
A power receiving side shield part (50) surrounding the power receiving side electromagnetic induction coil (12) and the power receiving side resonance part (27),
The power transmission system, wherein the power reception side electromagnetic induction coil (12) and the power reception side resonance section (27) are arranged in the same plane. The power reception side resonance section (27) includes a power reception side resonance coil (11),
The power transmission system according to claim 16, wherein the power reception side electromagnetic induction coil (12) and the power reception side resonance coil (11) are arranged in the same plane.   The power transmission system according to claim 17, wherein the power reception side resonance coil (11) is disposed inside the power reception side electromagnetic induction coil (12). A power transmission system including a power transmission device (41) and a power reception device (40),
The power transmission device (41)
A power transmission side electromagnetic induction coil (23);
A power transmission resonance unit (28);
A power transmission side shield part (51) surrounding the power transmission side electromagnetic induction coil (23) and the power transmission side resonance part (28),
The power receiving device (40)
A power receiving side electromagnetic induction coil (12);
A power receiving side resonance part (27) resonating with the power transmission side resonance part (28) by an electromagnetic field;
A power receiving side shield part (50) surrounding the power receiving side electromagnetic induction coil (12) and the power receiving side resonance part (27),
The power transmission side electromagnetic induction coil (23) and the power transmission side resonance section (28) are arranged in the same plane,
The power transmission system, wherein the power reception side electromagnetic induction coil (12) and the power reception side resonance section (27) are arranged in the same plane. The power transmission resonance unit (28) includes a power transmission resonance coil (24).
The power transmission side electromagnetic induction coil (23) and the power transmission side resonance coil (24) are arranged in the same plane,
The power reception side resonance section (27) includes a power reception side resonance coil (11),
The power transmission system according to claim 19, wherein the power reception side electromagnetic induction coil (12) and the power reception side resonance coil (11) are arranged in the same plane. The power transmission side resonance coil (24) is arranged inside the power transmission side electromagnetic induction coil (23),
The power transmission system according to claim 20, wherein the power reception side resonance coil (11) is disposed inside the power reception side electromagnetic induction coil (12).

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