JP2010074937A - Non-contact power receiving apparatus and vehicle equipped with the same - Google Patents

Abstract

A non-contact power receiving device with excellent heat dissipation and a vehicle including the same are provided.
A non-contact power receiving apparatus includes a secondary self-resonant coil that is a power receiving coil that receives power transmitted from a power transmitting coil by electromagnetic resonance, a coil case that houses the power receiving coil, and a coil case. And a capacitor 404 that is disposed outside of 402 and is electrically connected to the receiving coil to adjust the resonance frequency of the receiving coil.
[Selection] Figure 4

Description

  The present invention relates to a non-contact power receiving apparatus and a vehicle including the same, and more particularly to a technique for supplying electric power from a power source outside the vehicle to the vehicle in a non-contact manner.

  As environmentally friendly vehicles, electric vehicles such as electric vehicles and hybrid vehicles have attracted a great deal of attention. These vehicles are equipped with an electric motor that generates driving force and a rechargeable power storage device that stores electric power supplied to the electric motor. The hybrid vehicle is a vehicle in which an internal combustion engine is further mounted as a power source together with an electric motor, or a vehicle in which a fuel cell is further mounted together with a power storage device as a DC power source for driving the vehicle.

  As in the case of an electric vehicle, a hybrid vehicle is known that can charge an in-vehicle power storage device from a power source outside the vehicle. For example, a so-called “plug-in hybrid vehicle” that can charge a power storage device from a general household power supply by connecting a power outlet provided in a house and a charging port provided in the vehicle with a charging cable is known. Yes.

  On the other hand, as a power transmission method, wireless power transmission that does not use a power cord or a power transmission cable has recently attracted attention. As this wireless power transmission technology, three technologies known as power transmission using electromagnetic induction, power transmission using electromagnetic waves, and power transmission using a resonance method are known.

Among them, the resonance method is a non-contact power transmission technique in which a pair of resonators (for example, a pair of self-resonant coils) are resonated in an electromagnetic field (near field), and power is transmitted through the electromagnetic field. It is also possible to transmit power over a long distance (for example, several meters) (see Non-Patent Document 1).
International Publication No. 2007/008646 Pamphlet Andre Kurs, 5 others, “Wireless Power Transfer via Strongly Coupled Magnetic Resonances”, [online], July 6, 2007, SCIENCE 317, p. 83-86, [Search September 12, 2007], Internet <URL: http://www.sciencemag.org/cgi/reprint/317/5834/83.pdf>

  When power is transmitted by the resonance method, it is necessary to match the resonance frequencies of the power transmission side and the power reception side. Therefore, it is necessary to accurately match the impedances of the pair of self-resonant coils. For this reason, an adjustment capacitor may be connected to the self-resonant coil.

  In addition, since a high voltage is induced in the self-resonant coil during power reception, it is necessary to house the self-resonant coil in a case so that other electrical components do not come into contact with the self-resonant coil. The self-resonant coil generates heat during power reception, but the adjustment capacitor is a part that generates heat. Since the heat-resistant temperature of the capacitor is lower than the heat-resistant temperature of the coil, it is necessary to consider heat dissipation especially for the capacitor.

  In the above-mentioned document, such a problem is not particularly considered, and there is room for improvement in this respect.

  An object of the present invention is to provide a non-contact power receiving device excellent in heat dissipation and a vehicle including the same.

  In summary, the present invention relates to a non-contact power receiving device that receives power from a power transmission coil that receives power from a power source, and that receives power transmitted from the power transmission coil by electromagnetic resonance, and a power receiving coil And a capacitor disposed outside the coil case and electrically connected to the power receiving coil in order to adjust the resonance frequency of the power receiving coil.

  Preferably, the non-contact power receiving apparatus further includes a cooling device that is disposed outside the coil case and cools the capacitor.

  Preferably, the coil case is non-conductive. The non-contact power receiving apparatus further includes a conductive magnetic shield disposed outside the coil case. The capacitor is disposed outside the magnetic shield.

  Preferably, the coil case is non-conductive. The non-contact power receiving apparatus further includes a conductive magnetic shield disposed outside the coil case. The capacitor is disposed inside the magnetic shield.

  In another aspect, the present invention includes a contactless power receiving device that is a vehicle and receives power from a power transmission coil that receives power from a power source and performs power transmission. The non-contact power receiving device is arranged to receive power transmitted from the power transmitting coil by electromagnetic resonance, a coil case that houses the power receiving coil inside, and an outside of the coil case to adjust the resonance frequency of the power receiving coil And a capacitor electrically connected to the power receiving coil.

  Preferably, the non-contact power receiving device further includes a cooling device disposed outside the coil case for cooling the capacitor.

  Preferably, the coil case is non-conductive. The non-contact power receiving device further includes a conductive magnetic shield disposed outside the coil case. The capacitor is disposed outside the magnetic shield.

  Preferably, the coil case is non-conductive. The non-contact power receiving apparatus further includes a conductive magnetic shield disposed outside the coil case. The capacitor is disposed inside the magnetic shield.

  ADVANTAGE OF THE INVENTION According to this invention, heat dissipation improves and the non-contact power receiving apparatus excellent in durability is realizable.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

[Embodiment 1]
1 is an overall configuration diagram of a power feeding system according to Embodiment 1 of the present invention. Referring to FIG. 1, this power feeding system includes an electric vehicle 100 and a power feeding device 200. Electric vehicle 100 includes a secondary self-resonant coil 110, a secondary coil 120, a rectifier 130, a DC / DC converter 140, and a power storage device 150. Electric vehicle 100 further includes a power control unit (hereinafter also referred to as “PCU (Power Control Unit)”) 160, a motor 170, a vehicle ECU (Electronic Control Unit) 180, and a communication device 190.

  The secondary self-resonant coil 110 is disposed at the lower part of the vehicle body, but may be disposed at the upper part of the vehicle body as long as the power feeding device 200 is disposed above the vehicle. The secondary self-resonant coil 110 is an LC resonant coil whose both ends are open (not connected), and receives power from the power feeder 200 by resonating with a primary self-resonant coil 240 (described later) of the power feeder 200 via an electromagnetic field. To do. The capacitance component of the secondary self-resonant coil 110 is the stray capacitance of the coil, but capacitors connected to both ends of the coil may be provided.

  The secondary self-resonant coil 110 and the secondary self-resonant coil 240 are connected to the primary self-resonant coil 240 and the secondary self-resonant coil 240 based on the distance from the primary self-resonant coil 240 and the resonance frequency of the primary self-resonant coil 240 and secondary self-resonant coil 110. The number of turns is appropriately set so that the Q value (for example, Q> 100) indicating the resonance intensity with the self-resonant coil 110 and κ indicating the degree of coupling increase.

  The secondary coil 120 is disposed coaxially with the secondary self-resonant coil 110 and can be magnetically coupled to the secondary self-resonant coil 110 by electromagnetic induction. The secondary coil 120 takes out the electric power received by the secondary self-resonant coil 110 by electromagnetic induction and outputs it to the rectifier 130. The rectifier 130 rectifies the AC power extracted by the secondary coil 120.

  DC / DC converter 140 converts the power rectified by rectifier 130 into a voltage level of power storage device 150 based on a control signal from vehicle ECU 180 and outputs the voltage to power storage device 150. When power is received from power supply device 200 while the vehicle is traveling (in that case, power supply device 200 may be disposed above or to the side of the vehicle, for example), DC / DC converter 140 includes a rectifier. The power rectified by 130 may be converted into a system voltage and supplied directly to the PCU 160. DC / DC converter 140 is not necessarily required, and the AC power extracted by secondary coil 120 may be directly rectified by rectifier 130 and then directly supplied to power storage device 150.

  Power storage device 150 is a rechargeable DC power source, and includes, for example, a secondary battery such as lithium ion or nickel metal hydride. The power storage device 150 stores power supplied from the DC / DC converter 140 and also stores regenerative power generated by the motor 170. Then, power storage device 150 supplies the stored power to PCU 160. Note that a large-capacity capacitor can also be used as the power storage device 150, and is a power buffer that can temporarily store the power supplied from the power supply device 200 and the regenerative power from the motor 170 and supply the stored power to the PCU 160. Anything is acceptable.

  PCU 160 drives motor 170 with power output from power storage device 150 or power directly supplied from DC / DC converter 140. PCU 160 also rectifies the regenerative power generated by motor 170 and outputs the rectified power to power storage device 150 to charge power storage device 150. The motor 170 is driven by the PCU 160 to generate a vehicle driving force and output it to driving wheels. Motor 170 generates electricity using kinetic energy received from driving wheels or an engine (not shown), and outputs the generated regenerative power to PCU 160.

  When the vehicle is traveling, vehicle ECU 180 controls PCU 160 based on the traveling state of the vehicle and the state of charge of power storage device 150 (hereinafter also referred to as “SOC (State Of Charge)”). Communication device 190 is a communication interface for performing wireless communication with power supply device 200 outside the vehicle.

  On the other hand, power supply device 200 includes AC power supply 210, high-frequency power driver 220, primary coil 230, primary self-resonant coil 240, communication device 250, and ECU 260.

  AC power supply 210 is a power supply external to the vehicle, for example, a system power supply. The high frequency power driver 220 converts power received from the AC power source 210 into high frequency power, and supplies the converted high frequency power to the primary coil 230. Note that the frequency of the high-frequency power generated by the high-frequency power driver 220 is, for example, 1M to 10 and several MHz.

  Primary coil 230 is arranged coaxially with primary self-resonant coil 240 and can be magnetically coupled to primary self-resonant coil 240 by electromagnetic induction. The primary coil 230 feeds high-frequency power supplied from the high-frequency power driver 220 to the primary self-resonant coil 240 by electromagnetic induction.

  Primary self-resonant coil 240 is disposed in the vicinity of the ground, but may be disposed above or to the side of the vehicle when power is supplied to electrically powered vehicle 100 from above the vehicle. The primary self-resonant coil 240 is also an LC resonant coil whose both ends are open (not connected), and transmits electric power to the electric vehicle 100 by resonating with the secondary self-resonant coil 110 of the electric vehicle 100 via an electromagnetic field. The capacitance component of the primary self-resonant coil 240 is also the stray capacitance of the coil, but capacitors connected to both ends of the coil may be provided.

  The primary self-resonant coil 240 also has a Q value (for example, Q> based on the distance from the secondary self-resonant coil 110 of the electric vehicle 100, the resonance frequency of the primary self-resonant coil 240 and the secondary self-resonant coil 110, etc. 100), and the number of turns is appropriately set so that the degree of coupling κ and the like are increased.

  Communication device 250 is a communication interface for performing wireless communication with electric powered vehicle 100 to which power is supplied. The ECU 260 controls the high frequency power driver 220 so that the received power of the electric vehicle 100 becomes a target value. Specifically, ECU 260 acquires the received power of electric vehicle 100 and its target value from electric vehicle 100 by communication device 250, and outputs high-frequency power driver 220 so that the received power of electric vehicle 100 matches the target value. To control. In addition, ECU 260 can transmit the impedance value of power supply apparatus 200 to electrically powered vehicle 100.

  FIG. 2 is a diagram for explaining the principle of power transmission by the resonance method. 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 320 is connected to the high frequency power supply 310, and 1 M to 10 and several MHz high frequency power is supplied to the primary self-resonant coil 330 that is magnetically coupled to the primary coil 320 by electromagnetic induction. The primary self-resonant coil 330 is an LC resonator having its own inductance and stray capacitance, and resonates with a secondary self-resonant coil 340 having the same resonance frequency as the primary self-resonant coil 330 via an electromagnetic field (near field). . Then, energy (electric power) moves from the primary self-resonant coil 330 to the secondary self-resonant coil 340 via the electromagnetic field. The energy (electric power) transferred to the secondary self-resonant coil 340 is taken out by the secondary coil 350 that is magnetically coupled to the secondary self-resonant coil 340 by electromagnetic induction and supplied to the load 360. Note that power transmission by the resonance method is realized when the Q value indicating the resonance intensity between the primary self-resonant coil 330 and the secondary self-resonant coil 340 is greater than 100, for example.

  1 will be described. The AC power supply 210 and the high-frequency power driver 220 in FIG. 1 correspond to the high-frequency power supply 310 in FIG. Further, the primary coil 230 and the primary self-resonant coil 240 in FIG. 1 correspond to the primary coil 320 and the primary self-resonant coil 330 in FIG. 2, respectively, and the secondary self-resonant coil 110 and the secondary coil 120 in FIG. This corresponds to the secondary self-resonant coil 340 and the secondary coil 350 in FIG. In addition, the rectifier 130 and the subsequent parts in FIG.

  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 includes 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 by 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, Energy (electric power) is transmitted to the resonator (secondary self-resonant 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.

  FIG. 4 is a diagram illustrating a configuration of the non-contact power receiving apparatus 400 in the first embodiment. The non-contact power receiving apparatus 400 includes the secondary self-resonant coil 110 and the secondary coil 120 shown in FIG. A vehicle is equipped with a non-contact power receiving device that receives power from a power transmission coil that receives power from a power source outside the vehicle and transmits power.

  Referring to FIG. 4, non-contact power receiving apparatus 400 includes a power receiving coil (secondary self-resonant coil 110) that receives power transmitted from a power transmitting coil (primary self-resonant coil 240 in FIG. 1) by electromagnetic resonance, A coil case 402 that houses the coil therein, and a capacitor 404 that is disposed outside the coil case 402 and is electrically connected to the power receiving coil in order to adjust the resonance frequency of the power receiving coil. Note that the capacitor 404 is added to adjust the resonance frequency, and may not be as large as the smoothing capacitor connected to the power source of the motor drive inverter.

  The coil case 402 is provided to hold and protect the secondary self-resonant coil 110 and the secondary coil 120. Since the coil case is provided, it is possible to prevent foreign matter from being inserted into or contacted with the secondary self-resonant coil 110 and the secondary coil 120 in which a high voltage is induced during power reception.

  The capacitor 404 generates heat during power reception. However, since the capacitor 404 is disposed outside the case, the capacitor 404 does not require excessive heat resistance because of good heat dissipation.

[Embodiment 2]
The description using FIGS. 1 to 3 shown in the first embodiment is also applied to the second embodiment as it is. Therefore, description is not repeated for FIGS.

  FIG. 5 is a diagram illustrating a configuration of the non-contact power receiving apparatus 410 according to the second embodiment. The non-contact power receiving apparatus 410 includes the secondary self-resonant coil 110 and the secondary coil 120 shown in FIG. The vehicle is equipped with a non-contact power receiving device 410 that receives power from a power transmission coil that receives power from a power source outside the vehicle and transmits power.

  Referring to FIG. 5, non-contact power receiving apparatus 410 includes a power receiving coil (secondary self-resonant coil 110) that receives power transmitted from a power transmitting coil (primary self-resonant coil 240 in FIG. 1) by electromagnetic resonance, It includes a magnetic shield 412 that houses the coil therein, and a capacitor 404 that is disposed outside the magnetic shield 412 and is electrically connected to the power receiving coil in order to adjust the resonance frequency of the power receiving coil. Note that the capacitor 404 is added to adjust the resonance frequency, and may not be as large as the smoothing capacitor connected to the power source of the motor drive inverter.

  The magnetic shield 412 is provided to suppress a leakage electromagnetic field radiated from the secondary self-resonant coil 110 and the secondary coil 120 to the surrounding space. The magnetic shield 412 is conductive and can reduce leakage electromagnetic fields. In addition, if a component such as the capacitor 404 is spatially close to the secondary self-resonant coil 110, it may adversely affect the resonance system. Therefore, it may be preferable to place the capacitor 404 outside the magnetic shield 412 in order to prevent such influence.

  The capacitor 404 generates heat during power reception. However, since the capacitor 404 is disposed outside the magnetic shield 412, the capacitor 404 is not required to have excessive heat resistance because of good heat dissipation.

[Embodiment 3]
The description using FIGS. 1 to 3 shown in the first embodiment is also applied to the third embodiment as it is. Therefore, description is not repeated for FIGS.

  FIG. 6 is a diagram illustrating a configuration of the non-contact power receiving apparatus 420 according to the third embodiment. The non-contact power receiving apparatus 420 includes the secondary self-resonant coil 110 and the secondary coil 120 shown in FIG. A vehicle is equipped with a non-contact power receiving device that receives power from a power transmission coil that receives power from a power source outside the vehicle and transmits power.

  Similar to the non-contact power receiving apparatus 400 shown in FIG. 4, the non-contact power receiving apparatus 420 receives the power transmitted from the power transmitting coil (primary self-resonant coil 240 in FIG. 1) by electromagnetic resonance (secondary self-resonant). A coil 110), a coil case 402 that houses the power receiving coil therein, and a capacitor 404 that is disposed outside the coil case 402 and is electrically connected to the power receiving coil in order to adjust the resonance frequency of the power receiving coil. . Note that the capacitor 404 is added to adjust the resonance frequency, and may not be as large as the smoothing capacitor connected to the power source of the motor drive inverter.

  The coil case 402 is non-conductive (for example, made of resin), and further has a conductive magnetic shield 412 (for example, an enclosure with a copper foil attached) disposed outside the coil case as shown in FIG. Prepare. The capacitor 404 is disposed outside the magnetic shield 412.

  The capacitor 404 generates heat during power reception. However, since the capacitor 404 is disposed outside the magnetic shield 412, heat dissipation is good and the capacitor 404 is not required to have excessive heat resistance.

[Embodiment 4]
The description using FIGS. 1 to 3 shown in the first embodiment is also applied to the fourth embodiment as it is. Therefore, description is not repeated for FIGS.

  FIG. 7 is a diagram illustrating a configuration of the non-contact power receiving device 430 according to the fourth embodiment. The non-contact power receiving device 430 includes the secondary self-resonant coil 110 and the secondary coil 120 shown in FIG. A vehicle is equipped with a non-contact power receiving device that receives power from a power transmission coil that receives power from a power source outside the vehicle and transmits power.

  In the fourth embodiment, the coil case 402 is non-conductive. The non-contact power receiving device 430 further includes a conductive magnetic shield 412 disposed outside the coil case 402. The capacitor 404 is disposed outside the coil case 402 and inside the magnetic shield 412.

  Since the magnetic shield 412 is spatially wider than the coil case 402, even in this case, the heat dissipation performance is better than placing the capacitor 404 inside the coil case 402. Note that the magnetic shield is not necessarily made of copper foil or the like, and may be partially or wholly formed of a vehicle body steel plate or the like.

[Modification]
In order to further improve the heat dissipation performance, a cooling device may be disposed near the capacitor.

FIG. 8 is a diagram illustrating a configuration of a modification.
Referring to FIG. 8, the non-contact power receiving device 440 of this modification is disposed outside the coil case 402 in the configuration of the non-contact power receiving device of any of FIGS. 4, 6, and 7, and cools the capacitor 404. The cooling device 450 is further included.

  Capacitor 404 is attached to electrode plates 404C and 404D connected to both ends of secondary self-resonant coil 110, a plurality of capacitor elements 404A sandwiched between electrode plates 404C and 404D, and an upper portion of electrode plate 404C. Heat sink 404B.

  The cooling device 450 can be an air cooling fan as shown in FIG. 8, for example. A water cooling device or the like may be used instead of the air cooling fan. The cooling device is provided in the vicinity of the capacitor 404. For example, the cooling device is arranged outside the coil case 402 in the arrangement shown in FIG. 4, is arranged outside the magnetic shield 412 in the arrangement shown in FIG. 6, and is arranged outside the coil case 402 in the arrangement shown in FIG. It is arranged outside and inside the magnetic shield 412.

  In the configuration shown in FIG. 8, a magnetic shield 412 may be arranged instead of the coil case 402 as shown in FIG. 5, and a capacitor 404 and a cooling device 450 for cooling it may be arranged outside the magnetic shield 412. Good.

  Thus, by providing the cooling device, the heat dissipation performance of the capacitor can be further improved.

  Note that the non-contact power receiving device described in each of the above embodiments can be mounted on various electric vehicles. The electric vehicle can be applied to other types of hybrid vehicles besides the series / parallel type hybrid vehicle in which the power of the engine can be divided and transmitted to the drive wheels and the motor generator by the power split device. That is, for example, a so-called series-type hybrid vehicle that uses an engine only to drive a motor generator and generates the driving force of the vehicle only by the motor generator, or only regenerative energy of the kinetic energy generated by the engine is electric energy. The present invention can also be applied to a hybrid vehicle that is recovered as a motor, a motor-assist type hybrid vehicle in which a motor assists the engine as the main power.

  The present invention can also be applied to an electric vehicle that does not include an engine and runs only by electric power, and a fuel cell vehicle that further includes a fuel cell as a DC power source in addition to a power storage device. The present invention is also applicable to an electric vehicle that does not include a boost converter.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and is intended to include meanings equivalent to the scope of claims for patent and all modifications within the scope.

1 is an overall configuration diagram of a power feeding system according to Embodiment 1 of the present invention. It is a figure for demonstrating the principle of the power transmission by the 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. 3 is a diagram showing a configuration of a non-contact power receiving device 400 in the first embodiment. FIG. 6 is a diagram illustrating a configuration of a non-contact power receiving apparatus 410 according to Embodiment 2. FIG. 6 is a diagram illustrating a configuration of a non-contact power receiving apparatus 420 according to Embodiment 3. FIG. FIG. 6 is a diagram illustrating a configuration of a non-contact power receiving device 430 according to a fourth embodiment. It is the figure which showed the structure of the modification.

Explanation of symbols

  100 electric vehicle, 110, 340 secondary self-resonant coil, 120, 350 secondary coil, 130 rectifier, 140 converter, 150 power storage device, 170 motor, 190 communication device, 200 power supply device, 210 AC power source, 220 high frequency power driver, 230, 320 primary coil, 240, 330 primary self-resonant coil, 250 communication device, 310 high frequency power supply, 360 load, 400, 410, 420, 430, 440 non-contact power receiving device, 402 coil case, 404 capacitor, 404A capacitor element, 404B Heat sink, 404C, 404D Electrode plate, 412 Magnetic shield, 450 Cooling device, 180 Vehicle ECU.

Claims (8)

A non-contact power receiving device that receives power from a power transmission coil that receives power from a power source and performs power transmission,
A power receiving coil that receives power transmitted from the power transmitting coil by electromagnetic resonance;
A coil case that houses the power receiving coil;
A non-contact power receiving apparatus, comprising: a capacitor disposed outside the coil case and electrically connected to the power receiving coil in order to adjust a resonance frequency of the power receiving coil.   The non-contact power receiving apparatus according to claim 1, further comprising a cooling device disposed outside the coil case and configured to cool the capacitor. The coil case is non-conductive,
A conductive magnetic shield disposed outside the coil case;
The non-contact power receiving device according to claim 1, wherein the capacitor is disposed outside the magnetic shield. The coil case is non-conductive,
A conductive magnetic shield disposed outside the coil case;
The non-contact power receiving device according to claim 1, wherein the capacitor is disposed inside the magnetic shield. A vehicle,
A non-contact power receiving device that receives power from a power transmission coil that receives power from a power source and performs power transmission,
The non-contact power receiving device is:
A power receiving coil that receives power transmitted from the power transmitting coil by electromagnetic resonance;
A coil case that houses the power receiving coil;
A vehicle including a capacitor disposed outside the coil case and electrically connected to the power receiving coil in order to adjust a resonance frequency of the power receiving coil. The non-contact power receiving device is:
The vehicle according to claim 5, further comprising a cooling device disposed outside the coil case and configured to cool the capacitor. The coil case is non-conductive,
The non-contact power receiving device is:
A conductive magnetic shield disposed outside the coil case;
The vehicle according to claim 5 or 6, wherein the capacitor is disposed outside the magnetic shield. The coil case is non-conductive,
The non-contact power receiving device is:
A conductive magnetic shield disposed outside the coil case;
The vehicle according to claim 5 or 6, wherein the capacitor is disposed inside the magnetic shield.

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