WO2015146299A1 - Wireless power supply antenna system and electronic device - Google Patents

Wireless power supply antenna system and electronic device Download PDF

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Publication number
WO2015146299A1
WO2015146299A1 PCT/JP2015/053089 JP2015053089W WO2015146299A1 WO 2015146299 A1 WO2015146299 A1 WO 2015146299A1 JP 2015053089 W JP2015053089 W JP 2015053089W WO 2015146299 A1 WO2015146299 A1 WO 2015146299A1
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WO
WIPO (PCT)
Prior art keywords
power
spiral coil
power transmission
antenna system
contact
Prior art date
Application number
PCT/JP2015/053089
Other languages
French (fr)
Japanese (ja)
Inventor
久村　達雄
佑介 久保
弘幸 良尊
Original Assignee
デクセリアルズ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by デクセリアルズ株式会社 filed Critical デクセリアルズ株式会社
Priority to CN201580017224.6A priority Critical patent/CN106463228A/en
Publication of WO2015146299A1 publication Critical patent/WO2015146299A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/14—Inductive couplings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/003—Printed circuit coils
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/248—Supports; Mounting means by structural association with other equipment or articles with receiving set provided with an AC/DC converting device, e.g. rectennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • 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
    • H02J50/005—Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
    • 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
    • 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
    • H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
    • H02J50/402—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas

Definitions

  • the present invention relates to a contactless power supply antenna system that supplies power in a contactless manner from a power transmission side to a power reception side by electromagnetic induction, and an electronic device, and in particular, a structure of a contactless power supply antenna provided on a power transmission side and a power reception side, and Regarding placement.
  • This application claims priority on the basis of Japanese Patent Application No. 2014-0667757 filed on March 28, 2014 in Japan. By referring to these applications, the present application Incorporated.
  • non-contact power supply that supplies power in a non-contact manner such as the electromagnetic induction type, including the international standard “Qi (registered trademark)” established by WPC (“Wireless Power Consortium”) It is being promoted in various fields such as automobiles.
  • Such non-contact power feeding is performed, for example, from a power transmission side coil to a power reception side coil by a power transmission device such as a charger including a power transmission side coil electromagnetically coupled to a power reception side coil incorporated in a power reception device such as a portable portable terminal. Power is fed toward the camera.
  • Patent Document 1 discloses that a base material of an antenna is formed of a flexible insulating member, and is folded and rolled up. A flexible power receiving coil that can be modified to be accommodated in a portable terminal is disclosed.
  • the shape of such devices is also diversifying so that so-called wristwatch-type portable terminals can be seen.
  • the power receiving device configured in a non-planar shape, such as an R-shaped curved portion or a shape having a bent portion bent into an L shape, is put into practical use. Is planned.
  • the spiral coil constituting the power receiving antenna provided in the power receiving device has a non-planar shape having a curved portion, a bent portion, etc.
  • the power transmission side coil provided in the charger for the conventional flat type power receiving device is a flat plate type. Therefore, the loss of power supplied from the power transmission side coil to the power reception side coil increases. That is, it is not possible to efficiently supply power from a power transmission device such as a charger to a power reception device such as a portable terminal via the power transmission side coil and the power reception side coil.
  • the power receiving coil disclosed in Patent Document 1 enables non-contact power feeding corresponding to the downsizing of the device. However, regarding power feeding efficiently through a non-planar non-contact power feeding antenna, reference is made. Not.
  • the present invention has been made in view of the above problems, and a new and improved non-contact power feeding antenna system and electronic apparatus capable of efficient power supply even when the non-contact power feeding antenna is non-planar.
  • the purpose is to provide.
  • One aspect of the present invention is a non-contact power feeding antenna system that supplies electric power from a power transmitting antenna device to a power receiving antenna device facing the power transmitting antenna device by electromagnetic induction, the power transmitting antenna device A spiral coil for power transmission configured by winding a conductive wire and a spiral coil for power reception configured by circulating the conductive wire provided in the power receiving antenna device, and At least one of the power receiving spiral coils has a non-planar shape, and the inner and outer edges of the projection from the one spiral coil to the other spiral coil are the inner edges of the other spiral coil. It is comprised so that it may become a substantially overlapping arrangement
  • the outer edge portion and the inner edge portion of the opposing power transmission and power reception spiral coils are arranged. There is almost no displacement. For this reason, the state where the efficiency of the power supply from the power transmission side to the power reception side can be maintained by electromagnetic induction.
  • the other spiral coil has an inner edge arranged inside the projection inner edge and an outer edge arranged outside the projection outer edge. It is good as it is.
  • the power supply efficiency from the power transmission side to the power reception side is more reliably improved by electromagnetic induction. Can be maintained.
  • the power transmission spiral coil and the power reception spiral coil may be configured in a non-planar shape having substantially the same curvature.
  • the power transmission spiral coil and the power reception spiral coil may be configured to have a curved portion having substantially the same curvature.
  • the power transmission spiral coil and the power reception spiral coil may be configured to have a bent portion that is bent at substantially the same angle.
  • the spiral coil for power transmission and the spiral coil for power reception are both configured to have a bent portion that is bent at substantially the same angle, the power transmission side to the power reception side can be more reliably performed by electromagnetic induction.
  • the power supply efficiency can be maintained in a good state.
  • Another aspect of the present invention is an electronic device, in which one of a spiral coil for power reception or a spiral coil for power transmission provided in any of the non-contact power feeding antenna systems described above is provided.
  • a power transmitting device such as a charger or a power receiving device such as a portable terminal equipped with the non-contact power feeding antenna. Is realized.
  • the antennas can be configured to reliably face each other. Therefore, from the power transmission side by electromagnetic induction to the power reception side. Can efficiently supply power.
  • FIG. 1 is a block diagram showing a schematic configuration of a non-contact power feeding system to which a non-contact power feeding antenna system according to an embodiment of the present invention is applied.
  • 2A to 2C are perspective views showing a schematic configuration of a contactless power feeding antenna system according to an embodiment of the present invention.
  • 3 is a cross-sectional view taken along the line AA in FIG. 2C.
  • FIG. 4 is an explanatory diagram showing a positional relationship between a power transmission spiral coil and a power reception spiral coil of the non-contact power feeding antenna system according to the embodiment of the present invention.
  • 5A to 5D are cross-sectional views showing examples of configurations of a power transmission spiral coil and a power reception spiral coil of the contactless power feeding antenna system according to the embodiment of the present invention.
  • FIG. 1 is a block diagram showing a schematic configuration of a non-contact power feeding system to which a non-contact power feeding antenna system according to an embodiment of the present invention is applied.
  • 2A to 2C are perspective views
  • FIG. 6 is a cross-sectional view showing another application example of the non-contact power feeding antenna system according to one embodiment of the present invention.
  • FIG. 7A to FIG. 7C are explanatory diagrams showing the positional relationship between the spiral coil for power transmission and the spiral coil for power reception in an example of the non-contact power feeding antenna system according to one embodiment of the present invention.
  • FIG. 8 is a characteristic diagram showing the relationship between the positional relationship between the spiral coil for power transmission and the spiral coil for power reception and the increase / decrease ratio of the magnetic coupling coefficient according to the example of the non-contact power feeding antenna system according to one embodiment of the present invention. is there.
  • FIG. 1 is a block diagram showing a schematic configuration of a non-contact power feeding system to which a non-contact power feeding antenna system according to an embodiment of the present invention is applied.
  • the non-contact power feeding antenna system 10 performs non-contact power feeding by electromagnetic induction from a power transmission device 12 including an electronic device such as a charger to a power receiving device 14 including an electronic device such as a portable terminal. This is applied to the contactless power feeding system 1 to be performed.
  • the power transmission apparatus 12 includes a power transmission circuit 16 provided with a resonance capacitor (not shown) and the like, and a power transmission antenna provided with a power transmission spiral coil 20 serving as a power transmission coil formed by winding a conducting wire (not shown).
  • Device 18 the power receiving device 14 is provided with a power receiving antenna device 22 provided with a power receiving spiral coil 24 serving as a power receiving coil formed by winding a conducting wire (not shown), a rectifier circuit (not shown), and the like.
  • a power receiving circuit 26 and a battery 28 are provided.
  • the power transmission circuit 16 supplies the power receiving device 14 with power supplied from a power source 30 such as a commercial AC power source via a power transmission antenna device 18 constituting a non-contact power feeding antenna.
  • the power receiving circuit 26 receives the power transmitted from the power transmitting device 12 via the power receiving antenna device 22 constituting the non-contact power feeding antenna, and supplies the battery 28 with power for charging.
  • the non-contact power feeding antenna system 10 according to one embodiment of the present invention supplies power from the power transmitting antenna device 18 to the power receiving antenna device 22 by electromagnetic induction in a non-contact manner. To do.
  • the alignment of the power transmission spiral coil 20 and the power reception spiral coil 24 is important in order to increase power supply efficiency.
  • the power transmission spiral coil 20 is greatly deviated from the power reception spiral coil 24, the magnetic coupling between the power transmission spiral coil 20 and the power reception spiral coil 24 becomes weak, so that the power supply efficiency decreases.
  • the power supply efficiency is not lowered and the efficiency is reduced.
  • technical features are applied to the structure and arrangement of the non-contact power feeding antennas on the power transmission side and the power reception side.
  • the flat portion is provided by arranging a non-contact power feeding antenna that can correspond to the shape of a non-planar shape portion having a bend or a curvature in which the flat portion cannot be secured. Even if this cannot be ensured, efficient power supply is possible.
  • the present inventor has a power transmission antenna device 18 that does not hinder the securing of power feeding efficiency in a contactless power feeding antenna having a bend or a curvature. The optimum region was found in the relative size (coil width of the opposing surface) of the spiral coils 20 and 24 of the power receiving antenna device 22 and the relative arrangement relationship.
  • FIG. 2A to 2C are perspective views showing a schematic configuration of a non-contact power feeding antenna system according to an embodiment of the present invention
  • FIG. 2A is a power receiving antenna provided in the non-contact power feeding antenna system of the present embodiment
  • FIG. 2B is a perspective view of the power transmission antenna device provided in the contactless power supply antenna system of the present embodiment
  • FIG. 2C is a power supply state of the contactless power supply antenna system of the present embodiment.
  • the non-contact power feeding antenna system 10 of the present embodiment is configured in a shape having bent portions 19 and 23 in which the power transmitting antenna device 18 and the power receiving antenna device 22 are bent at substantially the same angle. Is done. That is, the power transmission spiral coil 20 and the power reception spiral coil 24 that are opposed to each other are configured to have bent portions 19 and 23 that are bent at substantially the same angle.
  • the power receiving antenna device 22 has a power receiving spiral coil 24 bonded to the outer surface side of the magnetic body 25 bent in a substantially L shape, that is, the bent surface side via an adhesive member (not shown). ing. That is, in the power receiving antenna device 22, the power receiving spiral coil 24 is arranged on the bent surface side of the bent portion 23.
  • the bent surface side means the outer surface side of the bent portion 23 bent in a convex shape.
  • the power transmission antenna device 18 includes a power transmission spiral coil 20 on an inner surface side, that is, a bent rear surface side of the magnetic body 21 bent in a substantially L shape via an adhesive member (not shown). It is glued. That is, in the power transmission antenna device 18, the power transmission spiral coil 20 is arranged on the bent back surface side of the bent portion 19.
  • the bending back surface side shall show the inner surface side of the bending part 19 bent in convex shape.
  • the power transmitting antenna device 18 and the power receiving antenna device 22 are configured to have non-planar shapes in which the power transmitting spiral coil 20 and the power receiving spiral coil 24 have substantially the same curvature. For this reason, when performing non-contact power feeding, as shown in FIG. 2C, the power transmitting antenna device 18 and the power receiving antenna device 22 face each other with the power transmitting spiral coil 20 and the power receiving spiral coil 24 facing each other.
  • the power receiving device 14 (see FIG. 1) is small enough that there is not enough room for installing a flat plate type power receiving antenna as in the conventional case, or a so-called wristwatch type device. Since the shape of the main body itself is a non-planar shape, the power transmission antenna provided in the power transmission device 12 (see FIG. 1) is provided when the power receiving antenna itself to be installed must be a non-planar shape.
  • the spiral coil 20 for use is also configured in a non-planar shape having the same curvature. For this reason, the state where the efficiency of the electric power supply from the power transmission apparatus 12 to the power receiving apparatus 14 can be maintained by electromagnetic induction.
  • the power receiving spiral coil 24 of the power receiving antenna device 22 is arranged on the bent surface side of the bent portion 23, and the power transmitting spiral coil 20 of the power transmitting antenna device 18 is bent.
  • positions at the 19th bending back side each is good also as a reverse structure. That is, the power receiving spiral coil of the power receiving antenna device may be arranged on the bent back surface side of the bent portion, and the power transmitting spiral coil of the power transmitting antenna device may be arranged on the bent surface side of the bent portion.
  • FIG. 3 is a cross-sectional view taken along the line AA in FIG. 2C.
  • the power transmission spiral coil 20 and the power reception spiral coil 24 have substantially the same shape and size, and are disposed so as to overlap each other. That is, the power transmission spiral coil 20 and the power reception spiral coil 24 are configured to have bent portions 19 and 23 bent at substantially the same angle, and are configured to have non-planar shapes having substantially the same curvature.
  • the power transmission spiral coil 20 is configured to be somewhat larger in size than the power reception spiral coil 24.
  • the somewhat larger one is used as the spiral coil 20 of the power transmission antenna device 18, but either one of the antenna devices 18 and 22 may be used for power transmission or power reception.
  • the spiral coil 20 of the power transmission antenna device 18 is enlarged and the magnetic body 21 is also enlarged at that time. .
  • B1 ', B2' and outer edge portions A1 ', A2' are configured to be substantially overlapped.
  • the spiral coil for power transmission 20 has inner edges B1 ′ and B2 ′ arranged inside the projected inner edges n1 and n2 and the outer edge of the spiral coil for power transmission 20.
  • the parts A1 ′ and A2 ′ are arranged outside the projection outer edge parts m1 and m2. That is, the power transmission spiral coil 20 is configured to be somewhat larger in size than the power reception spiral coil 24, and the inner edge portions B 1 ′ and B 2 ′ thereof are disposed inside the inner edge portions B 1 and B 2 of the power reception spiral coil 24.
  • the outer edge portions A1 ′ and A2 ′ are arranged outside the outer edge portions A1 and A2 of the power receiving spiral coil 24.
  • the position of the inner edge B2 ′ of the power transmission spiral coil 20 is arranged on the outer circumference side than the position of the projected inner edge n2, or The position of the outer edge portion A2 ′ of the spiral coil 20 may be in a state where it is not satisfied in a part of the portion, such as being arranged on the inner peripheral side from the position of the projection outer edge portion m2.
  • FIG. 4 is an explanatory diagram showing a positional relationship between a power transmission spiral coil and a power reception spiral coil of the non-contact power feeding antenna system according to the embodiment of the present invention.
  • the present inventor As a result of intensive studies in order to achieve the above-described object of the present invention, the present inventor, as a result of the non-planar non-contact power feeding antenna, the power receiving spiral coil 24 and the power transmitting spiral that do not hinder the securing of power feeding efficiency.
  • the optimum region was found in the relative arrangement relationship of the coils 20.
  • the inner edge B2′-3 of the power transmitting spiral coil 20-3 is disposed on the inner side of the inner edge B2 of the power receiving spiral coil 24, and the outer edge A2′ ⁇ of the power transmitting spiral coil 20-3.
  • the power feeding efficiency is improved. That is, the inner edge B2′-3 of the power transmission spiral coil 20-3 is disposed inside the projected inner edge n2-3, and the outer edge A2′-3 of the power transmission spiral coil 20-3 is projected outer edge m2. If it is arranged outside of ⁇ 3, the power supply efficiency is improved.
  • the inner edge B2 ′ of the power transmission spiral coil 20 is disposed on the inner side of the projection inner edge n2, and the outer edge A2 ′ of the power transmission spiral coil 20 is projected. It turns out that it is preferable to set it as the structure arrange
  • both the power transmitting spiral coil 20 and the power receiving spiral coil 24 are configured to have substantially L-shaped bent portions 19 and 23.
  • the contact feeding antenna system 10 is not limited to this configuration. That is, at least one of the power transmission spiral coil 20 and the power reception spiral coil 24 is configured to have a non-planar shape, and the inner and outer edges of the projection from one spiral coil to the other spiral coil are the other spiral coil. What is necessary is just to be comprised so that it may become a substantially overlapping arrangement
  • FIG. 5A to 5D are cross-sectional views showing examples of configurations of a power transmission spiral coil and a power reception spiral coil of the contactless power feeding antenna system according to the embodiment of the present invention.
  • FIG. 6 is a cross-sectional view showing another application example of the non-contact power feeding antenna system according to one embodiment of the present invention.
  • the present invention even if the power transmitting antenna device 118 and the power receiving antenna device 122 are configured to have curved portions 119 and 123 having substantially the same curvature, the present invention.
  • the non-contact power feeding antenna system 10 can be applied. That is, even if the spiral coil for power transmission 120 affixed to the magnetic sheet 121 and the spiral coil 124 for power reception affixed to the magnetic sheet 125 are configured to have the curved portions 119 and 123 having substantially the same curvature, the electromagnetic wave is more reliably generated.
  • the state of good power supply efficiency from the power transmission side to the power reception side can be maintained by induction.
  • the non-contact power feeding antenna system 210 there are two bent portions 219a, 219b, 223a, and 223b where the power transmitting antenna device 218 and the power receiving antenna device 222 are bent at substantially the same angle.
  • the non-contact power feeding antenna system 10 according to one embodiment of the present invention can be applied. That is, two bent portions 219 a, 219 b, 223 a, and 223 b are provided in which the power transmission spiral coil 220 attached to the magnetic sheet 221 and the power reception spiral coil 224 attached to the magnetic sheet 225 are bent at substantially the same angle. Even in this configuration, it is possible to more reliably maintain a state in which the efficiency of power supply from the power transmission side to the power reception side is good by electromagnetic induction.
  • the embodiment of the present invention is used in the non-contact power feeding antenna system 310.
  • Such a contactless power feeding antenna system 10 can be applied.
  • the contactless power feeding antenna system 10 according to an embodiment of the present invention can be applied even if the power transmitting antenna device 318 is a flat plate type and only the power receiving antenna device 322 is configured in a non-planar shape.
  • the power transmitting spiral coil 320 and the power receiving spiral coil 324 face each other with almost no deviation. It only has to be configured. In other words, if the spiral coil for power transmission 320 affixed to the magnetic sheet 321 and the spiral coil for power reception 324 affixed to the magnetic sheet 325 are opposed to each other without substantially shifting in the width direction shown in FIG. The state of good power supply efficiency from the power transmission side to the power reception side can be maintained more reliably by electromagnetic induction.
  • the power transmitting antenna device 418 and the power receiving antenna device 422 may have a three-dimensional curved surface shape having substantially the same curvature.
  • Such a contactless power feeding antenna system 10 can be applied. That is, even if the spiral coil for power transmission 420 affixed to the inner surface side of the magnetic sheet 421 and the spiral coil for power reception 424 affixed to the outer surface side of the magnetic sheet 425 have a three-dimensional curved surface shape having substantially the same curvature, respectively.
  • the state of good power supply efficiency from the power transmission side to the power reception side can be maintained by electromagnetic induction.
  • the power transmitting antenna device 518 and the power receiving antenna device 522 are not only the non-contact power feeding antennas 520 and 524 but also communication antennas 526 and 527 such as NFC.
  • the antenna system 10 for non-contact power feeding according to an embodiment of the present invention can also be applied to an antenna device configured in parallel. That is, the spiral coil for power transmission 520 and the communication antenna 526 affixed to the magnetic sheet 521 and the spiral coil for power reception 524 and the communication antenna 527 affixed to the magnetic sheet 525 are configured to have curved portions 519 and 523 having substantially the same curvature. Even in such a case, it is possible to more reliably maintain a good power supply efficiency from the power transmission side to the power reception side by electromagnetic induction.
  • the power receiving device configured in a non-planar shape, such as an R-shaped curved portion or a shape having a bent portion bent into an L shape, is put into practical use.
  • the non-contact power feeding antenna system 10 according to an embodiment of the present invention, the degree of freedom in designing electronic devices such as portable terminals and chargers used for non-contact power feeding is also improved.
  • FIG. 7A to FIG. 7C are explanatory diagrams showing the positional relationship between the spiral coil for power transmission and the spiral coil for power reception in an example of the non-contact power feeding antenna system according to one embodiment of the present invention.
  • FIG. 8 is a graph showing the relationship between the positional relationship between the spiral coil for power transmission and the spiral coil for power reception and the increase / decrease rate of the magnetic coupling coefficient in the example of the non-contact power feeding antenna system according to one embodiment of the present invention.
  • FIG. 8 is a graph showing the relationship between the positional relationship between the spiral coil for power transmission and the spiral coil for power reception and the increase / decrease rate of the magnetic coupling coefficient in the example of the non-contact power feeding antenna system according to one embodiment of the present invention.
  • this example illustrates the non-contact power feeding antenna system 610 illustrated in FIGS. 7A to 7C, 710, 810 were used.
  • two antenna devices 618, 622 (718, 722, 818, 822) are prepared, and one antenna is bent so that the installation surface of the spiral coil 624 (724, 824) is on the bent surface side.
  • the device 622 (722, 822) was used, and the other was the antenna device 618 (718, 818) bent so that the installation surface of the spiral coil 620 (720, 820) was on the bent back side.
  • the antenna device 622 (722, 822) is a power receiving antenna device
  • the antenna device 618 (718, 818) is a power transmitting antenna device.
  • FIG. 7A shows a state where antenna devices 618 and 622 created by bending in the same shape are opposed to each other along the central axis of the antenna devices 618 and 622.
  • the spiral coil 620 of the antenna device 618 is shifted by ⁇ L toward the center of the spiral coil 620 with respect to the spiral coil 624 of the antenna device 622. turn into.
  • FIG. 7B and FIG. 7C show a state in which the antenna device is bent by changing the shape thereof and similarly opposed.
  • FIG. 7B shows an example in which the inner peripheral position and the outer peripheral position of the spiral coil 724 of the antenna device 722 and the spiral coil 720 of the antenna device 718 coincide with each other in the vertical direction of the winding portions of the spiral coils 724 and 720. This is an example in which ⁇ L is zero.
  • FIG. 7C is an example in which the spiral coil 820 of the antenna device 818 is shifted outward with respect to the spiral coil 824 of the antenna device 822.
  • the shape of the antenna devices 622, 722, 822 at this time is such that the size of the magnetic bodies 625, 725, 825 is 45 mm (long side length) ⁇ 35 mm (short side length), and the spiral coils 624, 724,
  • the outer diameters of 824 and 620 are 36 mm ⁇ 32 mm, and the inner diameter is 21 mm ⁇ 17 mm.
  • FIG. 8 shows the electromagnetic field simulation results.
  • FIG. 8 shows the increase / decrease rate of the magnetic coupling coefficient between the opposing antenna devices, and shows the increase / decrease rate of the magnetic coupling coefficient with respect to the value in the state of FIG. 7A.
  • the inner peripheral position and the outer peripheral position of the spiral coil 724 of the antenna device 722 and the spiral coil 720 of the antenna device 718 shown in FIG. 7B are perpendicular to the winding part of the spiral coils 724 and 720.
  • the magnetic coupling coefficient shows the largest value when matched in the direction. That is, when the spiral coils 720 and 724 of the antenna devices 718 and 722 for non-contact power feeding have a non-planar shape having bent portions 719 and 723, in order to increase the electrode supply efficiency by non-contact power feeding, both spirals are used. It can be seen that the coils 720 and 724 need to be provided so as to face each other without shifting.
  • the positional deviation between the power transmitting side and power receiving side antenna devices is within the range of a slight difference, it is possible to ensure high power supply efficiency by the non-contact type.
  • the inner edge and the outer edge of the projection from one spiral coil to the other spiral coil are arranged so as to substantially overlap the inner edge and the outer edge of the other spiral coil, high power supply by non-contact type It turns out that efficiency can be secured.
  • the spiral coil 20 is configured to be slightly larger than the other spiral coil 24.
  • the other spiral coil is configured such that its inner edge is disposed on the inner side of the projection inner edge and its outer edge is disposed on the outer side of the projection outer edge.
  • non-contact power feeding antenna system and the electronic device are not limited to those described in the embodiments and examples of the present invention, and various modifications can be made.
  • Non-contact electric power feeding system 10 Non-contact electric power feeding antenna system, 12 Power transmission device (electronic device), 14 Power receiving device (electronic device), 16 Power transmission circuit, 18 Power transmission antenna device, 19, 23 Bending part, 20 Power transmission spiral Coil, 22 Power receiving antenna device, 24 Power receiving spiral coil, 26 Power receiving circuit, 28 Battery, 30 Power supply, 119, 123, 519, 523 Curved part

Abstract

Efficient supply of power is enabled even when a wireless power supply antenna has a non-planar shape. A wireless power supply antenna system (10) that uses electromagnetic induction to wirelessly supply power from a transmission antenna device (18) to a receiving antenna device (22) facing said transmission antenna device comprises: a transmission spiral coil (20) provided in the transmission antenna device and formed by winding a conducting wire; and a receiving spiral coil (24) provided in the receiving antenna device and formed by winding a conducting wire. At least one of the transmission spiral coil and the receiving spiral coil is formed in a non-planar shape, and the transmission spiral coil and the receiving spiral coil are disposed such that an inner edge portion (n1) and an outer edge portion (m1) of the projection of one spiral coil onto the other spiral coil are substantially overlapped with an inner edge portion (B1') and an outer edge portion (A1') of said other spiral coil, respectively.

Description

非接触給電用アンテナシステム、及び電子機器Non-contact power feeding antenna system and electronic device
　本発明は、電磁誘導により送電側から受電側へ非接触で電力を供給する非接触給電用アンテナシステム、及び電子機器に関し、特に、送電側及び受電側に設けられる非接触給電用アンテナの構造及び配置等に関する。本出願は、日本国において２０１４年３月２８日に出願された日本特許出願番号特願２０１４－０６７７５７を基礎として優先権を主張するものであり、これらの出願を参照することにより、本出願に援用される。 The present invention relates to a contactless power supply antenna system that supplies power in a contactless manner from a power transmission side to a power reception side by electromagnetic induction, and an electronic device, and in particular, a structure of a contactless power supply antenna provided on a power transmission side and a power reception side, and Regarding placement. This application claims priority on the basis of Japanese Patent Application No. 2014-0667757 filed on March 28, 2014 in Japan. By referring to these applications, the present application Incorporated.
　従来より、ＷＰＣ（ Wireless Power Consortium ）により策定された国際標準規格「Ｑｉ（登録商標）」を始め、電磁誘導型等の非接触で電力供給をする非接触式給電の実用化が携帯端末や電気自動車等の各種分野で進められている。このような非接触給電は、例えば、携帯可能な携帯端末等の受電装置に組み込まれる受電側コイルに電磁結合する送電側コイルを備える充電器等の送電装置によって、送電側コイルから受電側コイルに向けて給電が行われる。 Conventionally, the practical use of non-contact power supply that supplies power in a non-contact manner such as the electromagnetic induction type, including the international standard “Qi (registered trademark)” established by WPC (“Wireless Power Consortium”) It is being promoted in various fields such as automobiles. Such non-contact power feeding is performed, for example, from a power transmission side coil to a power reception side coil by a power transmission device such as a charger including a power transmission side coil electromagnetically coupled to a power reception side coil incorporated in a power reception device such as a portable portable terminal. Power is fed toward the camera.
　受電装置となる携帯電話端末やＰＤＡ等の携帯情報端末の高機能化、小型化が進んでいるが、当該装置の小型化が進むにつれて、受電機能を確保するための受電コイルが実装できないことが懸念されていた。受電装置の小型化が進んでも、送電側より電力供給効率の良い給電を実現する従来技術として、特許文献１には、アンテナの基材を可撓性の絶縁部材で形成して、折り畳み、巻き込み等の携帯端末への収納に適した変形が可能なフレキシブルな受電コイルが開示されている。 Mobile phone terminals and PDAs and other portable information terminals serving as power receiving devices have been improved in function and size. However, as the size of the device has been reduced, power receiving coils for securing the power receiving function cannot be mounted. There was concern. As a conventional technique for realizing power feeding with higher power supply efficiency from the power transmission side even if the power receiving device is downsized, Patent Document 1 discloses that a base material of an antenna is formed of a flexible insulating member, and is folded and rolled up. A flexible power receiving coil that can be modified to be accommodated in a portable terminal is disclosed.
特開２０１３－１６５１９０号公報JP 2013-165190 A
　携帯端末の高機能化、小型化に伴い、アンテナとなる平板型のスパイラルコイルの設置スペースが十分に確保されないことが懸念されている。また、携帯端末の高機能化、小型化に加えて、いわゆる腕時計型の携帯端末等が見られるように、当該装置の形状の多様化も進んでいる。すなわち、装置本体が従来の平板型以外にも、Ｒ状の湾曲部やＬ字に折れ曲がった屈曲部を有する形状に構成されているもの等、非平面形状に構成されている受電装置の実用化が図られている。 There is a concern that a space for installing a flat spiral coil serving as an antenna may not be sufficiently secured as the mobile terminal becomes more functional and smaller. In addition to the enhancement and miniaturization of portable terminals, the shape of such devices is also diversifying so that so-called wristwatch-type portable terminals can be seen. In other words, in addition to the conventional flat plate type, the power receiving device configured in a non-planar shape, such as an R-shaped curved portion or a shape having a bent portion bent into an L shape, is put into practical use. Is planned.
　このため、当該受電装置に備わる受電用アンテナを構成するスパイラルコイルが湾曲部や屈曲部等を有する非平面形状となり、従来の平板型の受電装置向けの充電器に備わる送電側コイルが平板型となることから、送電側コイルから受電側コイルに供給した電力の損失が大きくなる。すなわち、送電側コイルと受電側コイルを介して、充電器等の送電装置から携帯端末等の受電装置に効率的な電力供給が行えない。特許文献１に開示された受電コイルは、装置の小型化に対応した非接触給電を可能としているが、非平面形状の非接触給電用アンテナを介して効率的に給電することに関しては、言及していない。 Therefore, the spiral coil constituting the power receiving antenna provided in the power receiving device has a non-planar shape having a curved portion, a bent portion, etc., and the power transmission side coil provided in the charger for the conventional flat type power receiving device is a flat plate type. Therefore, the loss of power supplied from the power transmission side coil to the power reception side coil increases. That is, it is not possible to efficiently supply power from a power transmission device such as a charger to a power reception device such as a portable terminal via the power transmission side coil and the power reception side coil. The power receiving coil disclosed in Patent Document 1 enables non-contact power feeding corresponding to the downsizing of the device. However, regarding power feeding efficiently through a non-planar non-contact power feeding antenna, reference is made. Not.
　本発明は、上記課題に鑑みてなされたものであり、非接触給電用アンテナが非平面形状でも、効率的な電力供給が可能な、新規かつ改良された非接触給電用アンテナシステム、及び電子機器を提供することを目的とする。 The present invention has been made in view of the above problems, and a new and improved non-contact power feeding antenna system and electronic apparatus capable of efficient power supply even when the non-contact power feeding antenna is non-planar. The purpose is to provide.
　本発明の一態様は、電磁誘導により送電用アンテナ装置から該送電用アンテナ装置に対向する受電用アンテナ装置に非接触で電力を供給する非接触給電用アンテナシステムであって、前記送電用アンテナ装置に設けられ、導線が周回して構成される送電用スパイラルコイルと、前記受電用アンテナ装置に設けられ、導線が周回して構成される受電用スパイラルコイルと、を備え、前記送電用スパイラルコイルと前記受電用スパイラルコイルの少なくとも何れか一方のスパイラルコイルが非平面形状に構成され、かつ、前記一方のスパイラルコイルから他方のスパイラルコイルへの投影の内縁部及び外縁部が該他方のスパイラルコイルの内縁部及び外縁部と略重複する配置となるように構成される。 One aspect of the present invention is a non-contact power feeding antenna system that supplies electric power from a power transmitting antenna device to a power receiving antenna device facing the power transmitting antenna device by electromagnetic induction, the power transmitting antenna device A spiral coil for power transmission configured by winding a conductive wire and a spiral coil for power reception configured by circulating the conductive wire provided in the power receiving antenna device, and At least one of the power receiving spiral coils has a non-planar shape, and the inner and outer edges of the projection from the one spiral coil to the other spiral coil are the inner edges of the other spiral coil. It is comprised so that it may become a substantially overlapping arrangement | positioning with a part and an outer edge part.
　本発明の一態様によれば、送電用スパイラルコイルと受電用スパイラルコイルの少なくとも何れか一方が非平面形状に構成されていても、対向する送電用及び受電用スパイラルコイルの外縁部と内縁部の位置ずれが殆ど無い状態となる。このため、電磁誘導により送電側から受電側への電力供給の効率が良好な状態を維持できる。 According to one aspect of the present invention, even if at least one of the power transmission spiral coil and the power reception spiral coil is configured in a non-planar shape, the outer edge portion and the inner edge portion of the opposing power transmission and power reception spiral coils are arranged. There is almost no displacement. For this reason, the state where the efficiency of the power supply from the power transmission side to the power reception side can be maintained by electromagnetic induction.
　このとき、本発明の一態様では、前記他方のスパイラルコイルは、その内縁部が前記投影の内縁部より内側に配置され、かつ、その外縁部が前記投影の外縁部より外側に配置される構成となっていることとしてもよい。 At this time, in one aspect of the present invention, the other spiral coil has an inner edge arranged inside the projection inner edge and an outer edge arranged outside the projection outer edge. It is good as it is.
　このようにすれば、送電用スパイラルコイルと受電用スパイラルコイルの少なくとも何れか一方が非平面形状に構成されていても、より確実に電磁誘導により送電側から受電側への電力供給の効率が良好な状態を維持できる。 In this way, even when at least one of the spiral coil for power transmission and the spiral coil for power reception is configured in a non-planar shape, the power supply efficiency from the power transmission side to the power reception side is more reliably improved by electromagnetic induction. Can be maintained.
　また、本発明の一態様では、前記送電用スパイラルコイル及び前記受電用スパイラルコイルが略同一の曲率を有する非平面形状に構成されることとしてもよい。 Moreover, in one aspect of the present invention, the power transmission spiral coil and the power reception spiral coil may be configured in a non-planar shape having substantially the same curvature.
　このようにすれば、送電用スパイラルコイルと受電用スパイラルコイルが何れも非平面形状に構成されていても、より確実に電磁誘導により送電側から受電側への電力供給の効率が良好な状態を維持できる。 In this way, even if both the spiral coil for power transmission and the spiral coil for power reception are configured in a non-planar shape, the power supply efficiency from the power transmission side to the power reception side is more reliably improved by electromagnetic induction. Can be maintained.
　また、本発明の一態様では、前記送電用スパイラルコイル及び前記受電用スパイラルコイルが略同一の曲率の湾曲部を有する形状に構成されることとしてもよい。 In one embodiment of the present invention, the power transmission spiral coil and the power reception spiral coil may be configured to have a curved portion having substantially the same curvature.
　このようにすれば、送電用スパイラルコイルと受電用スパイラルコイルが何れも略同一の曲率の湾曲部を有する形状に構成されていても、より確実に電磁誘導により送電側から受電側への電力供給の効率が良好な状態を維持できる。 In this way, even if both the spiral coil for power transmission and the spiral coil for power reception are configured to have a curved portion with substantially the same curvature, power supply from the power transmission side to the power reception side is more reliably performed by electromagnetic induction. Can maintain a good efficiency.
　また、本発明の一態様では、前記送電用スパイラルコイル及び前記受電用スパイラルコイルが略同一の角度で屈曲した屈曲部を有する形状に構成されることとしてもよい。 In one embodiment of the present invention, the power transmission spiral coil and the power reception spiral coil may be configured to have a bent portion that is bent at substantially the same angle.
　このようにすれば、送電用スパイラルコイルと受電用スパイラルコイルが何れも略同一の角度で屈曲した屈曲部を有する形状に構成されていても、より確実に電磁誘導により送電側から受電側への電力供給の効率が良好な状態を維持できる。 In this way, even if the spiral coil for power transmission and the spiral coil for power reception are both configured to have a bent portion that is bent at substantially the same angle, the power transmission side to the power reception side can be more reliably performed by electromagnetic induction. The power supply efficiency can be maintained in a good state.
　また、本発明の他の態様は、電子機器であって、前述した何れかの非接触給電用アンテナシステムに備わる受電用スパイラルコイル又は送電用スパイラルコイルの一方が設けられる。 Another aspect of the present invention is an electronic device, in which one of a spiral coil for power reception or a spiral coil for power transmission provided in any of the non-contact power feeding antenna systems described above is provided.
　本発明の他の態様によれば、非接触給電用アンテナが非平面形状でも、当該非接触給電用アンテナを備える充電器等の送電装置や携帯端末等の受電装置等によって、効率的な電力供給が実現される。 According to another aspect of the present invention, even when the non-contact power feeding antenna is non-planar, efficient power supply is performed by a power transmitting device such as a charger or a power receiving device such as a portable terminal equipped with the non-contact power feeding antenna. Is realized.
　以上説明したように本発明によれば、非接触給電用アンテナが非平面形状でも、双方のアンテナを確実に対向する配置となる構成とすることができるので、電磁誘導による送電側から受電側への電力供給を効率的に行える。 As described above, according to the present invention, even when the non-contact power feeding antenna is a non-planar shape, the antennas can be configured to reliably face each other. Therefore, from the power transmission side by electromagnetic induction to the power reception side. Can efficiently supply power.
図１は、本発明の一実施形態に係る非接触給電用アンテナシステムが適用される非接触給電システムの概略構成を示すブロック図である。FIG. 1 is a block diagram showing a schematic configuration of a non-contact power feeding system to which a non-contact power feeding antenna system according to an embodiment of the present invention is applied. 図２Ａ乃至図２Ｃは、本発明の一実施形態に係る非接触給電用アンテナシステムの概略構成を示す斜視図である。2A to 2C are perspective views showing a schematic configuration of a contactless power feeding antenna system according to an embodiment of the present invention. 図３は、図２ＣのＡ－Ａ断面図である。3 is a cross-sectional view taken along the line AA in FIG. 2C. 図４は、本発明の一実施形態に係る非接触給電用アンテナシステムの送電用スパイラルコイルと受電用スパイラルコイルとの位置関係を示す説明図である。FIG. 4 is an explanatory diagram showing a positional relationship between a power transmission spiral coil and a power reception spiral coil of the non-contact power feeding antenna system according to the embodiment of the present invention. 図５Ａ乃至図５Ｄは、本発明の一実施形態に係る非接触給電用アンテナシステムの送電用スパイラルコイルと受電用スパイラルコイルの構成例を示す断面図である。5A to 5D are cross-sectional views showing examples of configurations of a power transmission spiral coil and a power reception spiral coil of the contactless power feeding antenna system according to the embodiment of the present invention. 図６は、本発明の一実施形態に係る非接触給電用アンテナシステムの他の適用例を示す断面図である。FIG. 6 is a cross-sectional view showing another application example of the non-contact power feeding antenna system according to one embodiment of the present invention. 図７Ａ乃至図７Ｃは、本発明の一実施形態に係る非接触給電用アンテナシステムの実施例における送電用スパイラルコイルと受電用スパイラルコイルとの位置関係を示す説明図である。FIG. 7A to FIG. 7C are explanatory diagrams showing the positional relationship between the spiral coil for power transmission and the spiral coil for power reception in an example of the non-contact power feeding antenna system according to one embodiment of the present invention. 図８は、本発明の一実施形態に係る非接触給電用アンテナシステムの実施例による送電用スパイラルコイルと受電用スパイラルコイルとの位置関係と磁気結合係数の増減割合との関係を示す特性図である。FIG. 8 is a characteristic diagram showing the relationship between the positional relationship between the spiral coil for power transmission and the spiral coil for power reception and the increase / decrease ratio of the magnetic coupling coefficient according to the example of the non-contact power feeding antenna system according to one embodiment of the present invention. is there.
　以下、本発明の好適な実施の形態について詳細に説明する。なお、以下に説明する本実施形態は、特許請求の範囲に記載された本発明の内容を不当に限定するものではなく、本実施形態で説明される構成の全てが本発明の解決手段として必須であるとは限らない。 Hereinafter, preferred embodiments of the present invention will be described in detail. The present embodiment described below does not unduly limit the contents of the present invention described in the claims, and all the configurations described in the present embodiment are essential as means for solving the present invention. Not necessarily.
　まず、本発明の一実施形態に係る非接触給電用アンテナシステムが適用される非接触給電システムの概略構成について、図面を使用しながら説明する。図１は、本発明の一実施形態に係る非接触給電用アンテナシステムが適用される非接触給電システムの概略構成を示すブロック図である。 First, a schematic configuration of a non-contact power feeding system to which a non-contact power feeding antenna system according to an embodiment of the present invention is applied will be described with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration of a non-contact power feeding system to which a non-contact power feeding antenna system according to an embodiment of the present invention is applied.
　本発明の一実施形態に係る非接触給電用アンテナシステム１０は、充電器等の電子機器からなる送電装置１２から、携帯端末等の電子機器からなる受電装置１４への電磁誘導による非接触給電を行う非接触給電システム１に適用される。 The non-contact power feeding antenna system 10 according to an embodiment of the present invention performs non-contact power feeding by electromagnetic induction from a power transmission device 12 including an electronic device such as a charger to a power receiving device 14 including an electronic device such as a portable terminal. This is applied to the contactless power feeding system 1 to be performed.
　送電装置１２は、共振用コンデンサ（図示せず）等が設けられる送電回路１６と、導線（図示せず）が周回して構成される送電コイルとなる送電用スパイラルコイル２０が設けられる送電用アンテナ装置１８とを備える。一方、受電装置１４は、導線（図示せず）が周回して構成される受電コイルとなる受電用スパイラルコイル２４が設けられる受電用アンテナ装置２２と、整流回路（図示せず）等が設けられる受電回路２６と、バッテリ２８とを備える。 The power transmission apparatus 12 includes a power transmission circuit 16 provided with a resonance capacitor (not shown) and the like, and a power transmission antenna provided with a power transmission spiral coil 20 serving as a power transmission coil formed by winding a conducting wire (not shown). Device 18. On the other hand, the power receiving device 14 is provided with a power receiving antenna device 22 provided with a power receiving spiral coil 24 serving as a power receiving coil formed by winding a conducting wire (not shown), a rectifier circuit (not shown), and the like. A power receiving circuit 26 and a battery 28 are provided.
　送電回路１６は、非接触給電用アンテナを構成する送電用アンテナ装置１８を介して、商用交流電源等の電源３０から供給される電力を受電装置１４に供給する。受電回路２６は、非接触給電用アンテナを構成する受電用アンテナ装置２２を介して、送電装置１２から送電されてきた電力を受電して、バッテリ２８に充電用として電力を供給する。 The power transmission circuit 16 supplies the power receiving device 14 with power supplied from a power source 30 such as a commercial AC power source via a power transmission antenna device 18 constituting a non-contact power feeding antenna. The power receiving circuit 26 receives the power transmitted from the power transmitting device 12 via the power receiving antenna device 22 constituting the non-contact power feeding antenna, and supplies the battery 28 with power for charging.
　本実施形態では、送電用スパイラルコイル２０に流れる電流によって発生する磁界を変化させることにより、送電用スパイラルコイル２０に近距離で対向する受電用スパイラルコイル２４に起電力を発生させる。そして、電源３０からの電力を送電装置１２から受電装置１４のバッテリ２８に供給する。このようにして、非接触給電システム１では、本発明の一実施形態に係る非接触給電用アンテナシステム１０によって、電磁誘導により送電用アンテナ装置１８から受電用アンテナ装置２２に非接触で電力を供給する。 In this embodiment, an electromotive force is generated in the power receiving spiral coil 24 facing the power transmitting spiral coil 20 at a short distance by changing a magnetic field generated by a current flowing in the power transmitting spiral coil 20. Then, power from the power supply 30 is supplied from the power transmission device 12 to the battery 28 of the power reception device 14. Thus, in the non-contact power feeding system 1, the non-contact power feeding antenna system 10 according to one embodiment of the present invention supplies power from the power transmitting antenna device 18 to the power receiving antenna device 22 by electromagnetic induction in a non-contact manner. To do.
　非接触給電システム１で送電装置１２から受電装置１４に電力供給する際に、給電効率を上げるためには、送電用スパイラルコイル２０と受電用スパイラルコイル２４との位置合わせが重要となる。すなわち、送電用スパイラルコイル２０が受電用スパイラルコイル２４から大きくずれると、送電用スパイラルコイル２０と受電用スパイラルコイル２４との磁気的な結合が弱くなるので、給電効率が低下する。 When supplying power from the power transmission device 12 to the power reception device 14 in the non-contact power supply system 1, the alignment of the power transmission spiral coil 20 and the power reception spiral coil 24 is important in order to increase power supply efficiency. In other words, when the power transmission spiral coil 20 is greatly deviated from the power reception spiral coil 24, the magnetic coupling between the power transmission spiral coil 20 and the power reception spiral coil 24 becomes weak, so that the power supply efficiency decreases.
　特に、本実施形態では、送電用スパイラルコイル２０又は受電用スパイラルコイル２４の少なくとも何れかが湾曲部や屈曲部を有する形状に構成されている場合でも、給電効率を低下させずに、効率的な電力供給をするために、送電側及び受電側の非接触給電用アンテナの構造及び配置に技術的特徴を施している。 In particular, in this embodiment, even when at least one of the power transmission spiral coil 20 or the power reception spiral coil 24 is configured in a shape having a curved portion or a bent portion, the power supply efficiency is not lowered and the efficiency is reduced. In order to supply electric power, technical features are applied to the structure and arrangement of the non-contact power feeding antennas on the power transmission side and the power reception side.
　前述したように、小型化が進んでいる携帯電話端末や携帯情報端末等のような電子機器では、設置スペースの関係で非接触給電用アンテナを配置するための大きな平坦部を確保しにくい。このため、小型化された電子機器の狭い部分に非接触給電用アンテナを搭載すると、その給電効率が悪くなり、非接触給電システム１に適用される非接触給電用アンテナシステム１０を小型化された電子機器１２、１４に搭載する際の大きな課題になっていた。 As described above, in an electronic device such as a mobile phone terminal or a portable information terminal whose size has been reduced, it is difficult to secure a large flat portion for disposing a non-contact power feeding antenna because of installation space. For this reason, when a non-contact power feeding antenna is mounted in a narrow part of a miniaturized electronic device, the power feeding efficiency deteriorates, and the non-contact power feeding antenna system 10 applied to the non-contact power feeding system 1 is downsized. This has been a major problem when mounted on the electronic devices 12 and 14.
　このため、本実施形態では、かかる課題を解決するために、平坦部が確保できない屈曲や曲率のある非平面形状部分の形状に対応可能な非接触給電用アンテナを配設することにより、平坦部が確保できない場合でも、効率的な給電が可能としている。本発明者は、前述した本発明の目的を達成するために鋭意検討を重ねた結果、屈曲や曲率を有する非接触給電用アンテナにおいて、給電効率確保の妨げにならないような送電用アンテナ装置１８と受電用アンテナ装置２２のスパイラルコイル２０、２４の相対的大きさ（対向面のコイル幅）と相対的な配置関係に最適領域を見出した。 For this reason, in this embodiment, in order to solve such a problem, the flat portion is provided by arranging a non-contact power feeding antenna that can correspond to the shape of a non-planar shape portion having a bend or a curvature in which the flat portion cannot be secured. Even if this cannot be ensured, efficient power supply is possible. As a result of intensive studies in order to achieve the above-described object of the present invention, the present inventor has a power transmission antenna device 18 that does not hinder the securing of power feeding efficiency in a contactless power feeding antenna having a bend or a curvature. The optimum region was found in the relative size (coil width of the opposing surface) of the spiral coils 20 and 24 of the power receiving antenna device 22 and the relative arrangement relationship.
　次に、本発明の一実施形態に係る非接触給電用アンテナシステムの概略構成について、図面を使用しながら説明する。図２Ａ乃至図２Ｃは、本発明の一実施形態に係る非接触給電用アンテナシステムの概略構成を示す斜視図であり、図２Ａは、本実施形態の非接触給電用アンテナシステムに備わる受電用アンテナ装置の斜視図を示し、図２Ｂは、本実施形態の非接触給電用アンテナシステムに備わる送電用アンテナ装置の斜視図を示し、図２Ｃは、本実施形態の非接触給電用アンテナシステムの給電状態における斜視図を示す。 Next, a schematic configuration of a contactless power feeding antenna system according to an embodiment of the present invention will be described with reference to the drawings. 2A to 2C are perspective views showing a schematic configuration of a non-contact power feeding antenna system according to an embodiment of the present invention, and FIG. 2A is a power receiving antenna provided in the non-contact power feeding antenna system of the present embodiment. FIG. 2B is a perspective view of the power transmission antenna device provided in the contactless power supply antenna system of the present embodiment, and FIG. 2C is a power supply state of the contactless power supply antenna system of the present embodiment. FIG.
　本実施形態の非接触給電用アンテナシステム１０は、図２Ｃに示すように、送電用アンテナ装置１８及び受電用アンテナ装置２２がそれぞれ略同一の角度で屈曲した屈曲部１９、２３を有する形状に構成される。すなわち、対向する送電用スパイラルコイル２０と受電用スパイラルコイル２４が略同一の角度で屈曲した屈曲部１９、２３を有する形状に構成されることを特徴とする。 As shown in FIG. 2C, the non-contact power feeding antenna system 10 of the present embodiment is configured in a shape having bent portions 19 and 23 in which the power transmitting antenna device 18 and the power receiving antenna device 22 are bent at substantially the same angle. Is done. That is, the power transmission spiral coil 20 and the power reception spiral coil 24 that are opposed to each other are configured to have bent portions 19 and 23 that are bent at substantially the same angle.
　受電用アンテナ装置２２は、図２Ａに示すように、略Ｌ字型に屈曲した磁性体２５の外面側すなわち屈曲表面側に受電用スパイラルコイル２４が不図示の接着部材等を介して、接着されている。すなわち、受電用アンテナ装置２２は、受電用スパイラルコイル２４が屈曲部２３の屈曲表面側に配置されている。なお、屈曲表面側とは、凸状に屈曲した屈曲部２３の外面側を示すものとする。 As shown in FIG. 2A, the power receiving antenna device 22 has a power receiving spiral coil 24 bonded to the outer surface side of the magnetic body 25 bent in a substantially L shape, that is, the bent surface side via an adhesive member (not shown). ing. That is, in the power receiving antenna device 22, the power receiving spiral coil 24 is arranged on the bent surface side of the bent portion 23. The bent surface side means the outer surface side of the bent portion 23 bent in a convex shape.
　一方、送電用アンテナ装置１８は、図２Ｂに示すように、略Ｌ字型に屈曲した磁性体２１の内面側すなわち屈曲裏面側に送電用スパイラルコイル２０が不図示の接着部材等を介して、接着されている。すなわち、送電用アンテナ装置１８は、送電用スパイラルコイル２０が屈曲部１９の屈曲裏面側に配置されている。なお、屈曲裏面側とは、凸状に屈曲した屈曲部１９の内面側を示すものとする。 On the other hand, as shown in FIG. 2B, the power transmission antenna device 18 includes a power transmission spiral coil 20 on an inner surface side, that is, a bent rear surface side of the magnetic body 21 bent in a substantially L shape via an adhesive member (not shown). It is glued. That is, in the power transmission antenna device 18, the power transmission spiral coil 20 is arranged on the bent back surface side of the bent portion 19. In addition, the bending back surface side shall show the inner surface side of the bending part 19 bent in convex shape.
　このように、本実施形態では、送電用アンテナ装置１８と受電用アンテナ装置２２は、送電用スパイラルコイル２０、受電用スパイラルコイル２４が略同一の曲率を有する非平面形状に構成されている。このため、非接触給電を行う際には、図２Ｃに示すように、送電用アンテナ装置１８と受電用アンテナ装置２２は、送電用スパイラルコイル２０、受電用スパイラルコイル２４が対向するようになる。 Thus, in the present embodiment, the power transmitting antenna device 18 and the power receiving antenna device 22 are configured to have non-planar shapes in which the power transmitting spiral coil 20 and the power receiving spiral coil 24 have substantially the same curvature. For this reason, when performing non-contact power feeding, as shown in FIG. 2C, the power transmitting antenna device 18 and the power receiving antenna device 22 face each other with the power transmitting spiral coil 20 and the power receiving spiral coil 24 facing each other.
　すなわち、本実施形態では、受電装置１４（図１参照）が従来のような平板型の受電用アンテナを設置するスペースの余裕がないくらい小型な場合や、いわゆる腕時計型等のように、その装置本体の形状自体が非平面形状であるために、設置する受電用アンテナ自体も非平面形状とせざるを得ない場合に、送電装置１２（図１参照）に備える送電用アンテナ装置１８に設けられる送電用スパイラルコイル２０も同様の曲率を有する非平面形状に構成する。このため、電磁誘導により送電装置１２から受電装置１４への電力供給の効率が良好な状態を維持できる。 In other words, in the present embodiment, the power receiving device 14 (see FIG. 1) is small enough that there is not enough room for installing a flat plate type power receiving antenna as in the conventional case, or a so-called wristwatch type device. Since the shape of the main body itself is a non-planar shape, the power transmission antenna provided in the power transmission device 12 (see FIG. 1) is provided when the power receiving antenna itself to be installed must be a non-planar shape. The spiral coil 20 for use is also configured in a non-planar shape having the same curvature. For this reason, the state where the efficiency of the electric power supply from the power transmission apparatus 12 to the power receiving apparatus 14 can be maintained by electromagnetic induction.
　なお、図２Ａ乃至図２Ｃに示す実施形態では、受電用アンテナ装置２２の受電用スパイラルコイル２４が屈曲部２３の屈曲表面側に配置され、送電用アンテナ装置１８の送電用スパイラルコイル２０が屈曲部１９の屈曲裏面側に配置されているが、それぞれが逆の構成としてもよい。すなわち、受電用アンテナ装置の受電用スパイラルコイルが屈曲部の屈曲裏面側に配置され、送電用アンテナ装置の送電用スパイラルコイルが屈曲部の屈曲表面側に配置される構成としてもよい。 2A to 2C, the power receiving spiral coil 24 of the power receiving antenna device 22 is arranged on the bent surface side of the bent portion 23, and the power transmitting spiral coil 20 of the power transmitting antenna device 18 is bent. Although it arrange | positions at the 19th bending back side, each is good also as a reverse structure. That is, the power receiving spiral coil of the power receiving antenna device may be arranged on the bent back surface side of the bent portion, and the power transmitting spiral coil of the power transmitting antenna device may be arranged on the bent surface side of the bent portion.
　次に、本発明の一実施形態に係る非接触給電用アンテナシステム１０における送電用アンテナ装置１８と受電用アンテナ装置２２の位置関係について、図面を使用しながら説明する。図３は、図２ＣのＡ－Ａ断面図である。 Next, the positional relationship between the power transmitting antenna device 18 and the power receiving antenna device 22 in the contactless power feeding antenna system 10 according to an embodiment of the present invention will be described with reference to the drawings. 3 is a cross-sectional view taken along the line AA in FIG. 2C.
　送電用スパイラルコイル２０と受電用スパイラルコイル２４は、略同一の形状と大きさを有して、互いに略重複する配置となっている。すなわち、送電用スパイラルコイル２０と受電用スパイラルコイル２４は、略同一の角度で屈曲した屈曲部１９、２３を有する形状に構成され、略同一の曲率を有する非平面形状に構成されている。 The power transmission spiral coil 20 and the power reception spiral coil 24 have substantially the same shape and size, and are disposed so as to overlap each other. That is, the power transmission spiral coil 20 and the power reception spiral coil 24 are configured to have bent portions 19 and 23 bent at substantially the same angle, and are configured to have non-planar shapes having substantially the same curvature.
　また、本実施形態では、送電用スパイラルコイル２０は、受電用スパイラルコイル２４より幾分サイズが大きい構成となっている。なお、本実施形態では、幾分サイズの大きい方を送電用アンテナ装置１８のスパイラルコイル２０としているが、アンテナ装置１８、２２のどちらを送電用、受電用に用いてもよい。一般的には、送電側の方に空間的に余裕がある場合が多いので、送電用アンテナ装置１８のスパイラルコイル２０を大きくして、その際に、合わせて磁性体２１も大きくすることが好ましい。 In the present embodiment, the power transmission spiral coil 20 is configured to be somewhat larger in size than the power reception spiral coil 24. In the present embodiment, the somewhat larger one is used as the spiral coil 20 of the power transmission antenna device 18, but either one of the antenna devices 18 and 22 may be used for power transmission or power reception. Generally, since there is often a space on the power transmission side, it is preferable that the spiral coil 20 of the power transmission antenna device 18 is enlarged and the magnetic body 21 is also enlarged at that time. .
　電磁誘導による送電装置１２から受電装置１４への電力供給効率が良好な状態を維持するためには、非接触給電用アンテナシステム１０を構成する双方のアンテナ装置１８、２２に設けられるそれぞれのスパイラルコイル２０、２４が互いにずれないように対向して配置される必要がある。このため、本実施形態では、図３に示すように、受電用スパイラルコイル２４から送電用スパイラルコイル２０への投影の内縁部ｎ１、ｎ２及び外縁部ｍ１、ｍ２が送電用スパイラルコイル２０の内縁部Ｂ１´、Ｂ２´及び外縁部Ａ１´、Ａ２´と略重複する配置となるように構成している。 In order to maintain a good power supply efficiency from the power transmitting device 12 to the power receiving device 14 by electromagnetic induction, the respective spiral coils provided in both antenna devices 18 and 22 constituting the non-contact power feeding antenna system 10. 20 and 24 need to be arranged facing each other so as not to deviate from each other. For this reason, in this embodiment, as shown in FIG. 3, the inner edges n1 and n2 and the outer edges m1 and m2 of the projection from the power receiving spiral coil 24 to the power transmitting spiral coil 20 are the inner edges of the power transmitting spiral coil 20. B1 ', B2' and outer edge portions A1 ', A2' are configured to be substantially overlapped.
　具体的には、図３に示すように、送電用スパイラルコイル２０は、その内縁部Ｂ１´、Ｂ２´が投影の内縁部ｎ１、ｎ２より内側に配置され、かつ、送電用スパイラルコイル２０の外縁部Ａ１´、Ａ２´が投影の外縁部ｍ１、ｍ２より外側に配置される構成となっている。すなわち、送電用スパイラルコイル２０は、受電用スパイラルコイル２４より幾分サイズが大きい構成となっており、その内縁部Ｂ１´、Ｂ２´が受電用スパイラルコイル２４の内縁部Ｂ１、Ｂ２より内側に配置され、かつ、その外縁部Ａ１´、Ａ２´が受電用スパイラルコイル２４の外縁部Ａ１、Ａ２より外側に配置される。なお、この配置関係は、コイル全周に渡って満たすのが好ましいが、例えば、送電用スパイラルコイル２０の内縁部Ｂ２´の位置が投影内縁部ｎ２の位置よりも外周側に配置されたり、送電用スパイラルコイル２０の外縁部Ａ２´の位置が投影外縁部ｍ２の位置より内周側に配置されたり等、一部の部分において満たさない状態になってもよい。 Specifically, as shown in FIG. 3, the spiral coil for power transmission 20 has inner edges B1 ′ and B2 ′ arranged inside the projected inner edges n1 and n2 and the outer edge of the spiral coil for power transmission 20. The parts A1 ′ and A2 ′ are arranged outside the projection outer edge parts m1 and m2. That is, the power transmission spiral coil 20 is configured to be somewhat larger in size than the power reception spiral coil 24, and the inner edge portions B 1 ′ and B 2 ′ thereof are disposed inside the inner edge portions B 1 and B 2 of the power reception spiral coil 24. In addition, the outer edge portions A1 ′ and A2 ′ are arranged outside the outer edge portions A1 and A2 of the power receiving spiral coil 24. Note that this arrangement relationship is preferably satisfied over the entire circumference of the coil. For example, the position of the inner edge B2 ′ of the power transmission spiral coil 20 is arranged on the outer circumference side than the position of the projected inner edge n2, or The position of the outer edge portion A2 ′ of the spiral coil 20 may be in a state where it is not satisfied in a part of the portion, such as being arranged on the inner peripheral side from the position of the projection outer edge portion m2.
　次に、本発明の一実施形態に係る非接触給電用アンテナシステムの送電用スパイラルコイルと受電用スパイラルコイルとの位置関係について、図面を使用しながら説明する。図４は、本発明の一実施形態に係る非接触給電用アンテナシステムの送電用スパイラルコイルと受電用スパイラルコイルとの位置関係を示す説明図である。 Next, the positional relationship between the power transmission spiral coil and the power reception spiral coil of the non-contact power feeding antenna system according to an embodiment of the present invention will be described with reference to the drawings. FIG. 4 is an explanatory diagram showing a positional relationship between a power transmission spiral coil and a power reception spiral coil of the non-contact power feeding antenna system according to the embodiment of the present invention.
　本発明者は、前述した本発明の目的を達成するために鋭意検討を重ねた結果、非平面形状の非接触給電用アンテナにおいて、給電効率確保の妨げにならない受電用スパイラルコイル２４と送電用スパイラルコイル２０の相対的な配置関係に最適領域を見出した。 As a result of intensive studies in order to achieve the above-described object of the present invention, the present inventor, as a result of the non-planar non-contact power feeding antenna, the power receiving spiral coil 24 and the power transmitting spiral that do not hinder the securing of power feeding efficiency. The optimum region was found in the relative arrangement relationship of the coils 20.
　図４に示すように、送電用スパイラルコイル２０－１の内縁部Ｂ２´－１が受電用スパイラルコイル２４の外縁部Ａ２より外側に配置される場合には、給電効率が悪い。また、送電用スパイラルコイル２０－２の内縁部Ｂ２´－２が受電用スパイラルコイル２４の外縁部Ａ２より内側に配置され、かつ、受電用スパイラルコイル２４の内縁部Ｂ２より外側に配置される場合でも、依然として給電効率が悪い。 As shown in FIG. 4, when the inner edge B2′-1 of the power transmitting spiral coil 20-1 is arranged outside the outer edge A2 of the power receiving spiral coil 24, the power feeding efficiency is poor. Further, when the inner edge B2′-2 of the power transmission spiral coil 20-2 is arranged inside the outer edge A2 of the power reception spiral coil 24 and arranged outside the inner edge B2 of the power reception spiral coil 24. However, power supply efficiency is still poor.
　これに対して、送電用スパイラルコイル２０－３の内縁部Ｂ２´－３が受電用スパイラルコイル２４の内縁部Ｂ２より内側に配置され、かつ、送電用スパイラルコイル２０－３の外縁部Ａ２´－３が受電用スパイラルコイル２４の外縁部Ａ２より外側に配置される場合では、給電効率が良くなる。すなわち、送電用スパイラルコイル２０－３の内縁部Ｂ２´－３が投影内縁部ｎ２－３より内側に配置され、かつ、送電用スパイラルコイル２０－３の外縁部Ａ２´－３が投影外縁部ｍ２－３より外側に配置されると、給電効率が良くなる。 On the other hand, the inner edge B2′-3 of the power transmitting spiral coil 20-3 is disposed on the inner side of the inner edge B2 of the power receiving spiral coil 24, and the outer edge A2′− of the power transmitting spiral coil 20-3. In the case where 3 is disposed outside the outer edge portion A2 of the power receiving spiral coil 24, the power feeding efficiency is improved. That is, the inner edge B2′-3 of the power transmission spiral coil 20-3 is disposed inside the projected inner edge n2-3, and the outer edge A2′-3 of the power transmission spiral coil 20-3 is projected outer edge m2. If it is arranged outside of −3, the power supply efficiency is improved.
　一方、図４に示すように、送電用スパイラルコイル２０－５の外縁部Ａ２´－５が受電用スパイラルコイル２４の内縁部Ｂ２より内側に配置される場合には、給電効率が悪い。また、送電用スパイラルコイル２０－４の外縁部Ａ２´－４が受電用スパイラルコイル２４の外縁部Ａ２より内側に配置され、かつ、受電用スパイラルコイル２４の内縁部Ｂ２より外側に配置される場合でも、依然として給電効率が悪い。 On the other hand, as shown in FIG. 4, when the outer edge portion A2′-5 of the power transmitting spiral coil 20-5 is arranged inside the inner edge portion B2 of the power receiving spiral coil 24, the power feeding efficiency is poor. Further, when the outer edge portion A2′-4 of the power transmission spiral coil 20-4 is disposed on the inner side of the outer edge portion A2 of the power reception spiral coil 24 and is disposed on the outer side of the inner edge portion B2 of the power reception spiral coil 24. However, power supply efficiency is still poor.
　このように、良好な給電効率を維持するためには、送電用スパイラルコイル２０の内縁部Ｂ２´が投影内縁部ｎ２より内側に配置され、かつ、送電用スパイラルコイル２０の外縁部Ａ２´が投影外縁部ｍ２より外側に配置される構成とすることが好ましいことが分かる。すなわち、送電用スパイラルコイル２０と受電用スパイラルコイル２４が非平面形状に構成されている場合でも、給電効率を良くするためには、上記条件の送電用スパイラルコイル２０と受電用スパイラルコイル２４の配置関係を満たす必要がある。 As described above, in order to maintain good power feeding efficiency, the inner edge B2 ′ of the power transmission spiral coil 20 is disposed on the inner side of the projection inner edge n2, and the outer edge A2 ′ of the power transmission spiral coil 20 is projected. It turns out that it is preferable to set it as the structure arrange | positioned outside the outer edge part m2. That is, even when the power transmission spiral coil 20 and the power reception spiral coil 24 are configured in a non-planar shape, the arrangement of the power transmission spiral coil 20 and the power reception spiral coil 24 under the above conditions is required in order to improve power supply efficiency. It is necessary to satisfy the relationship.
　なお、本実施形態では、送電用スパイラルコイル２０と受電用スパイラルコイル２４の双方が略Ｌ字型の屈曲部１９、２３を有する形状で構成されているが、本発明の一実施形態に係る非接触給電用アンテナシステム１０は、かかる構成に限定されない。すなわち、送電用スパイラルコイル２０と受電用スパイラルコイル２４の少なくとも何れか一方が非平面形状に構成され、かつ、一方のスパイラルコイルから他方のスパイラルコイルへの投影の内縁部及び外縁部が当該他方のスパイラルコイルの内縁部及び外縁部と略重複する配置となるように構成されていればよい。 In the present embodiment, both the power transmitting spiral coil 20 and the power receiving spiral coil 24 are configured to have substantially L-shaped bent portions 19 and 23. The contact feeding antenna system 10 is not limited to this configuration. That is, at least one of the power transmission spiral coil 20 and the power reception spiral coil 24 is configured to have a non-planar shape, and the inner and outer edges of the projection from one spiral coil to the other spiral coil are the other spiral coil. What is necessary is just to be comprised so that it may become a substantially overlapping arrangement | positioning with the inner edge part and outer edge part of a spiral coil.
　次に、本発明の一実施形態に係る非接触給電用アンテナシステムの他の実施態様について、図面を使用しながら説明する。図５Ａ乃至図５Ｄは、本発明の一実施形態に係る非接触給電用アンテナシステムの送電用スパイラルコイルと受電用スパイラルコイルの構成例を示す断面図である。また、図６は、本発明の一実施形態に係る非接触給電用アンテナシステムの他の適用例を示す断面図である。 Next, another embodiment of the contactless power feeding antenna system according to one embodiment of the present invention will be described with reference to the drawings. 5A to 5D are cross-sectional views showing examples of configurations of a power transmission spiral coil and a power reception spiral coil of the contactless power feeding antenna system according to the embodiment of the present invention. FIG. 6 is a cross-sectional view showing another application example of the non-contact power feeding antenna system according to one embodiment of the present invention.
　図５Ａに示すように、非接触給電用アンテナシステム１１０において、送電用アンテナ装置１１８と受電用アンテナ装置１２２が略同一の曲率の湾曲部１１９、１２３を有する形状に構成されていても、本発明の一実施形態に係る非接触給電用アンテナシステム１０を適用できる。すなわち、磁性シート１２１に貼付した送電用スパイラルコイル１２０と、磁性シート１２５に貼付した受電用スパイラルコイル１２４が略同一の曲率の湾曲部１１９、１２３を有する形状に構成しても、より確実に電磁誘導により送電側から受電側への電力供給の効率が良好な状態を維持できる。 As shown in FIG. 5A, in the non-contact power feeding antenna system 110, even if the power transmitting antenna device 118 and the power receiving antenna device 122 are configured to have curved portions 119 and 123 having substantially the same curvature, the present invention. The non-contact power feeding antenna system 10 according to one embodiment can be applied. That is, even if the spiral coil for power transmission 120 affixed to the magnetic sheet 121 and the spiral coil 124 for power reception affixed to the magnetic sheet 125 are configured to have the curved portions 119 and 123 having substantially the same curvature, the electromagnetic wave is more reliably generated. The state of good power supply efficiency from the power transmission side to the power reception side can be maintained by induction.
　また、図５Ｂに示すように、非接触給電用アンテナシステム２１０において、送電用アンテナ装置２１８と受電用アンテナ装置２２２が略同一の角度で屈曲した屈曲部２１９ａ、２１９ｂ、２２３ａ、２２３ｂがそれぞれ２箇所ずつ設けられる構成としても、本発明の一実施形態に係る非接触給電用アンテナシステム１０を適用できる。すなわち、磁性シート２２１に貼付した送電用スパイラルコイル２２０と、磁性シート２２５に貼付した受電用スパイラルコイル２２４がそれぞれ略同一の角度で屈曲した屈曲部２１９ａ、２１９ｂ、２２３ａ、２２３ｂを２箇所ずつ設けられる構成としても、より確実に電磁誘導により送電側から受電側への電力供給の効率が良好な状態を維持できる。 Further, as shown in FIG. 5B, in the non-contact power feeding antenna system 210, there are two bent portions 219a, 219b, 223a, and 223b where the power transmitting antenna device 218 and the power receiving antenna device 222 are bent at substantially the same angle. Even with the configuration provided one by one, the non-contact power feeding antenna system 10 according to one embodiment of the present invention can be applied. That is, two bent portions 219 a, 219 b, 223 a, and 223 b are provided in which the power transmission spiral coil 220 attached to the magnetic sheet 221 and the power reception spiral coil 224 attached to the magnetic sheet 225 are bent at substantially the same angle. Even in this configuration, it is possible to more reliably maintain a state in which the efficiency of power supply from the power transmission side to the power reception side is good by electromagnetic induction.
　さらに、図５Ｃに示すように、非接触給電用アンテナシステム３１０において、送電用アンテナ装置３１８と受電用アンテナ装置３２２の一方のみが非平面形状に構成されていても、本発明の一実施形態に係る非接触給電用アンテナシステム１０を適用できる。例えば、送電用アンテナ装置３１８を平板型として、受電用アンテナ装置３２２のみが非平面形状に構成されていても、本発明の一実施形態に係る非接触給電用アンテナシステム１０を適用できる。 Furthermore, as shown in FIG. 5C, in the non-contact power feeding antenna system 310, even if only one of the power transmitting antenna device 318 and the power receiving antenna device 322 is configured in a non-planar shape, the embodiment of the present invention is used. Such a contactless power feeding antenna system 10 can be applied. For example, the contactless power feeding antenna system 10 according to an embodiment of the present invention can be applied even if the power transmitting antenna device 318 is a flat plate type and only the power receiving antenna device 322 is configured in a non-planar shape.
　すなわち、受電用アンテナ装置３２２が図５Ｃに示すような２箇所の屈曲部３２３ａ、３２３ｂを有する形状に構成されていても、送電用スパイラルコイル３２０と受電用スパイラルコイル３２４が殆どずれることなく対向する構成となっていればよい。換言すると、磁性シート３２１に貼付した送電用スパイラルコイル３２０と、磁性シート３２５に貼付した受電用スパイラルコイル３２４が図５Ｃに示す幅方向に殆どずれることなく、それぞれ対向する構成となっていれば、より確実に電磁誘導により送電側から受電側への電力供給の効率が良好な状態を維持できる。 That is, even if the power receiving antenna device 322 is configured to have two bent portions 323a and 323b as shown in FIG. 5C, the power transmitting spiral coil 320 and the power receiving spiral coil 324 face each other with almost no deviation. It only has to be configured. In other words, if the spiral coil for power transmission 320 affixed to the magnetic sheet 321 and the spiral coil for power reception 324 affixed to the magnetic sheet 325 are opposed to each other without substantially shifting in the width direction shown in FIG. The state of good power supply efficiency from the power transmission side to the power reception side can be maintained more reliably by electromagnetic induction.
　また、図５Ｄに示すように、非接触給電用アンテナシステム４１０において、送電用アンテナ装置４１８と受電用アンテナ装置４２２が略同一の曲率を有する３次元曲面形状としても、本発明の一実施形態に係る非接触給電用アンテナシステム１０を適用できる。すなわち、磁性シート４２１の内面側に貼付した送電用スパイラルコイル４２０と、磁性シート４２５の外面側に貼付した受電用スパイラルコイル４２４がそれぞれ略同一の曲率を有する３次元曲面形状としても、より確実に電磁誘導により送電側から受電側への電力供給の効率が良好な状態を維持できる。 Further, as shown in FIG. 5D, in the non-contact power feeding antenna system 410, the power transmitting antenna device 418 and the power receiving antenna device 422 may have a three-dimensional curved surface shape having substantially the same curvature. Such a contactless power feeding antenna system 10 can be applied. That is, even if the spiral coil for power transmission 420 affixed to the inner surface side of the magnetic sheet 421 and the spiral coil for power reception 424 affixed to the outer surface side of the magnetic sheet 425 have a three-dimensional curved surface shape having substantially the same curvature, respectively. The state of good power supply efficiency from the power transmission side to the power reception side can be maintained by electromagnetic induction.
　さらに、図６に示すように、非接触給電用アンテナシステム５１０において、送電用アンテナ装置５１８と受電用アンテナ装置５２２が非接触給電用アンテナ５２０、５２４のみでなく、ＮＦＣ等の通信アンテナ５２６、５２７を並列した構成としたアンテナ装置にも、本発明の一実施形態に係る非接触給電用アンテナシステム１０を適用できる。すなわち、磁性シート５２１に貼付した送電用スパイラルコイル５２０及び通信アンテナ５２６と、磁性シート５２５に貼付した受電用スパイラルコイル５２４及び通信アンテナ５２７が略同一の曲率の湾曲部５１９、５２３を有する形状に構成しても、より確実に電磁誘導により送電側から受電側への電力供給の効率が良好な状態を維持できる。 Further, as shown in FIG. 6, in the non-contact power feeding antenna system 510, the power transmitting antenna device 518 and the power receiving antenna device 522 are not only the non-contact power feeding antennas 520 and 524 but also communication antennas 526 and 527 such as NFC. The antenna system 10 for non-contact power feeding according to an embodiment of the present invention can also be applied to an antenna device configured in parallel. That is, the spiral coil for power transmission 520 and the communication antenna 526 affixed to the magnetic sheet 521 and the spiral coil for power reception 524 and the communication antenna 527 affixed to the magnetic sheet 525 are configured to have curved portions 519 and 523 having substantially the same curvature. Even in such a case, it is possible to more reliably maintain a good power supply efficiency from the power transmission side to the power reception side by electromagnetic induction.
　このように、本実施形態では、非接触給電用アンテナとなる送電用アンテナ装置１８と受電用アンテナ装置２２に備わるスパイラルコイル２０、２４の少なくとも何れかが非平面形状でも、双方のアンテナ装置１８、２２のスパイラルコイル２０、２４を確実に対向する配置となる構成とすることができる。このため、アンテナ装置１８、２２の形状や設置態様に関わらず、電磁誘導による送電側から受電側への電力供給を効率的に行える。 As described above, in this embodiment, even if at least one of the spiral coils 20 and 24 provided in the power transmission antenna device 18 and the power receiving antenna device 22 serving as a non-contact power feeding antenna is non-planar, It can be set as the structure used as the arrangement | positioning which 22 spiral coils 20 and 24 oppose reliably. For this reason, it is possible to efficiently supply power from the power transmission side to the power reception side by electromagnetic induction regardless of the shapes and installation modes of the antenna devices 18 and 22.
　また、電子機器の装置本体の小型化や、その形状の多様化に対応して、非接触給電システムにおける高い電力供給効率を維持することができる。すなわち、装置本体が従来の平板型以外にも、Ｒ状の湾曲部やＬ字に折れ曲がった屈曲部を有する形状に構成されているもの等、非平面形状に構成されている受電装置の実用化に対応すべく、本発明の一実施形態に係る非接触給電用アンテナシステムを適用することによって、非接触給電における高い給電効率が確保される。 Also, it is possible to maintain high power supply efficiency in the non-contact power supply system in response to miniaturization of the main body of the electronic device and diversification of its shape. In other words, in addition to the conventional flat plate type, the power receiving device configured in a non-planar shape, such as an R-shaped curved portion or a shape having a bent portion bent into an L shape, is put into practical use. By applying the non-contact power feeding antenna system according to one embodiment of the present invention, high power feeding efficiency in the non-contact power feeding is ensured.
　このため、今後、更に電子機器の高機能化、小型化、装置本体の多様化等が進んでも、これらに対応可能な効率の良い非接触給電を実現できる。また、本発明の一実施形態に係る非接触給電用アンテナシステム１０を適用することによって、非接触給電に使用する携帯端末や充電器等の電子機器の設計の自由度も向上する。 Therefore, even in the future, even if electronic devices have higher functionality, smaller size, and more diverse device bodies, it is possible to realize efficient non-contact power feeding that can cope with them. Further, by applying the non-contact power feeding antenna system 10 according to an embodiment of the present invention, the degree of freedom in designing electronic devices such as portable terminals and chargers used for non-contact power feeding is also improved.
　次に、本発明の一実施形態に係る非接触給電用アンテナシステムの実施例について、図面を使用しながら説明する。図７Ａ乃至図７Ｃは、本発明の一実施形態に係る非接触給電用アンテナシステムの実施例における送電用スパイラルコイルと受電用スパイラルコイルとの位置関係を示す説明図である。また、図８は、本発明の一実施形態に係る非接触給電用アンテナシステムの実施例による送電用スパイラルコイルと受電用スパイラルコイルとの位置関係と磁気結合係数の増減割合との関係を示す特性図である。 Next, examples of the contactless power feeding antenna system according to an embodiment of the present invention will be described with reference to the drawings. FIG. 7A to FIG. 7C are explanatory diagrams showing the positional relationship between the spiral coil for power transmission and the spiral coil for power reception in an example of the non-contact power feeding antenna system according to one embodiment of the present invention. FIG. 8 is a graph showing the relationship between the positional relationship between the spiral coil for power transmission and the spiral coil for power reception and the increase / decrease rate of the magnetic coupling coefficient in the example of the non-contact power feeding antenna system according to one embodiment of the present invention. FIG.
　本実施例は、本発明の一実施形態に係る非接触給電用アンテナシステム１０（図１参照）の作用・効果を実証するために、図７Ａ乃至図７Ｃに示す非接触給電用アンテナシステム６１０、７１０、８１０を使用した。 In order to demonstrate the operation and effect of the non-contact power feeding antenna system 10 (see FIG. 1) according to one embodiment of the present invention, this example illustrates the non-contact power feeding antenna system 610 illustrated in FIGS. 7A to 7C, 710, 810 were used.
　各実施例では、二つのアンテナ装置６１８、６２２（７１８、７２２、８１８、８２２）を用意し、一方をスパイラルコイル６２４（７２４、８２４）の設置面が屈曲表面側になるように屈曲させたアンテナ装置６２２（７２２、８２２）とし、他方をスパイラルコイル６２０（７２０、８２０）の設置面が屈曲裏面側になるように屈曲させたアンテナ装置６１８（７１８、８１８）とした。本実施例では、アンテナ装置６２２（７２２、８２２）を受電用アンテナ装置、アンテナ装置６１８（７１８、８１８）を送電用アンテナ装置とした。 In each embodiment, two antenna devices 618, 622 (718, 722, 818, 822) are prepared, and one antenna is bent so that the installation surface of the spiral coil 624 (724, 824) is on the bent surface side. The device 622 (722, 822) was used, and the other was the antenna device 618 (718, 818) bent so that the installation surface of the spiral coil 620 (720, 820) was on the bent back side. In this embodiment, the antenna device 622 (722, 822) is a power receiving antenna device, and the antenna device 618 (718, 818) is a power transmitting antenna device.
　図７Ａは、同一形状で屈曲させて作成したアンテナ装置６１８、６２２をアンテナ装置６１８、６２２の中心軸に沿って対向させた状態を示す。アンテナ装置６１８、６２２を９０度に曲げた構成とした場合には、アンテナ装置６２２のスパイラルコイル６２４に対し、アンテナ装置６１８のスパイラルコイル６２０は、スパイラルコイル６２０の中心側にΔＬだけずれた構成となってしまう。 FIG. 7A shows a state where antenna devices 618 and 622 created by bending in the same shape are opposed to each other along the central axis of the antenna devices 618 and 622. When the antenna devices 618 and 622 are bent at 90 degrees, the spiral coil 620 of the antenna device 618 is shifted by ΔL toward the center of the spiral coil 620 with respect to the spiral coil 624 of the antenna device 622. turn into.
　次に、アンテナ装置の形状を変えて屈曲させて、同様に対向させた状態を図７Ｂ、図７Ｃに示す。図７Ｂは、アンテナ装置７２２のスパイラルコイル７２４と、アンテナ装置７１８のスパイラルコイル７２０の内周位置、外周位置がスパイラルコイル７２４、７２０の巻回部垂直方向で一致している例、つまり、位置ずれΔＬがゼロの例である。一方、図７Ｃは、アンテナ装置８２２のスパイラルコイル８２４に対し、アンテナ装置８１８のスパイラルコイル８２０が、外側にずれている例である。 Next, FIG. 7B and FIG. 7C show a state in which the antenna device is bent by changing the shape thereof and similarly opposed. FIG. 7B shows an example in which the inner peripheral position and the outer peripheral position of the spiral coil 724 of the antenna device 722 and the spiral coil 720 of the antenna device 718 coincide with each other in the vertical direction of the winding portions of the spiral coils 724 and 720. This is an example in which ΔL is zero. On the other hand, FIG. 7C is an example in which the spiral coil 820 of the antenna device 818 is shifted outward with respect to the spiral coil 824 of the antenna device 822.
　これらの図７Ａ乃至図７Ｃに示す実施例について、アンテナ装置間の磁気結合状態がどのように変わるかを電磁界シミュレーションにより調べた。このときのアンテナ装置６２２、７２２、８２２の形状は、磁性体６２５、７２５、８２５の大きさを４５ｍｍ（長辺の長さ）×３５ｍｍ（短辺の長さ）とし、スパイラルコイル６２４、７２４、８２４、６２０の外径を３６ｍｍ×３２ｍｍ、内径を２１ｍｍ×１７ｍｍとしている。 7A to 7C, how the magnetic coupling state between the antenna devices changes was examined by electromagnetic field simulation. The shape of the antenna devices 622, 722, 822 at this time is such that the size of the magnetic bodies 625, 725, 825 is 45 mm (long side length) × 35 mm (short side length), and the spiral coils 624, 724, The outer diameters of 824 and 620 are 36 mm × 32 mm, and the inner diameter is 21 mm × 17 mm.
　電磁界シミュレーション結果を図８に示す。図８において、図７Ａが位置ずれΔＬ＝－２．８ｍｍ、図７Ｂが位置ずれΔＬ＝０ｍｍ、図７Ｃが位置ずれΔＬ＝１．４ｍｍにそれぞれ対応している。なお、図８は、対向するアンテナ装置間の磁気結合係数の増減割合を表したもので、図７Ａの状態での値に対する磁気結合係数の増減割合を示している。 Fig. 8 shows the electromagnetic field simulation results. In FIG. 8, FIG. 7A corresponds to the positional deviation ΔL = −2.8 mm, FIG. 7B corresponds to the positional deviation ΔL = 0 mm, and FIG. 7C corresponds to the positional deviation ΔL = 1.4 mm. FIG. 8 shows the increase / decrease rate of the magnetic coupling coefficient between the opposing antenna devices, and shows the increase / decrease rate of the magnetic coupling coefficient with respect to the value in the state of FIG. 7A.
　図８に示すように、図７Ａに示す受電側と送電側のコイルを略同一の大きさ、形状としたものをそのまま屈曲させて対向させた場合では、双方のスパイラルコイル６２０、６２４の位置がずれる。このため、送電側から受電側に供給した電力のロスが発生して、その分、磁気結合係数が低下する。 As shown in FIG. 8, when the coils on the power receiving side and the power transmitting side shown in FIG. 7A having substantially the same size and shape are bent and faced as they are, the positions of both spiral coils 620 and 624 are the same. Shift. For this reason, the loss of the electric power supplied from the power transmission side to the power reception side occurs, and the magnetic coupling coefficient is reduced correspondingly.
　これに対して、図８に示すように、図７Ｂに示すアンテナ装置７２２のスパイラルコイル７２４と、アンテナ装置７１８のスパイラルコイル７２０の内周位置、外周位置がスパイラルコイル７２４、７２０の巻回部垂直方向で一致させた場合では、磁気結合係数が一番大きな値を示すことが分かる。すなわち、非接触給電用のアンテナ装置７１８、７２２のスパイラルコイル７２０、７２４が屈曲部７１９、７２３を有する非平面形状である場合に、非接触給電による電極供給効率を高めるためには、双方のスパイラルコイル７２０、７２４が互いにずれないで対向する配置となるように、設ける必要があることが分かる。 On the other hand, as shown in FIG. 8, the inner peripheral position and the outer peripheral position of the spiral coil 724 of the antenna device 722 and the spiral coil 720 of the antenna device 718 shown in FIG. 7B are perpendicular to the winding part of the spiral coils 724 and 720. It can be seen that the magnetic coupling coefficient shows the largest value when matched in the direction. That is, when the spiral coils 720 and 724 of the antenna devices 718 and 722 for non-contact power feeding have a non-planar shape having bent portions 719 and 723, in order to increase the electrode supply efficiency by non-contact power feeding, both spirals are used. It can be seen that the coils 720 and 724 need to be provided so as to face each other without shifting.
　なお、図８に示すように、位置ずれΔＬが０ｍｍでなくても、ΔＬ＝±２．０ｍｍ未満の範囲内であれば、増減割合が４％以上、すなわち、高い磁気結合係数を示すことが分かる。このことから、送電側と受電側のアンテナ装置間の位置ずれが多少の微差の範囲内であれば、非接触式による高い給電効率を確保できることが分かる。換言すると、一方のスパイラルコイルから他方のスパイラルコイルへの投影の内縁部及び外縁部が当該他方のスパイラルコイルの内縁部及び外縁部と略重複する配置となっていれば、非接触式による高い給電効率を確保できることが分かる。 As shown in FIG. 8, even if the positional deviation ΔL is not 0 mm, the increase / decrease rate is 4% or more, that is, a high magnetic coupling coefficient if it is within the range of ΔL = ± 2.0 mm. I understand. From this, it can be seen that if the positional deviation between the power transmitting side and power receiving side antenna devices is within the range of a slight difference, it is possible to ensure high power supply efficiency by the non-contact type. In other words, if the inner edge and the outer edge of the projection from one spiral coil to the other spiral coil are arranged so as to substantially overlap the inner edge and the outer edge of the other spiral coil, high power supply by non-contact type It turns out that efficiency can be secured.
　実際の使用に当たっては、送電側と受電側のアンテナ装置間の位置ずれを考慮して、前述した図３に示す本発明の一実施形態に係る非接触給電用アンテナシステム１０のように、一方のスパイラルコイル２０を他方のスパイラルコイル２４に比べて、やや大きくなる構成としている。すなわち、他方のスパイラルコイルは、その内縁部が投影の内縁部より内側に配置され、かつ、その外縁部が投影の外縁部より外側に配置される構成としている。 In actual use, in consideration of the positional deviation between the power transmitting side and power receiving side antenna devices, as in the non-contact power feeding antenna system 10 according to the embodiment of the present invention shown in FIG. The spiral coil 20 is configured to be slightly larger than the other spiral coil 24. In other words, the other spiral coil is configured such that its inner edge is disposed on the inner side of the projection inner edge and its outer edge is disposed on the outer side of the projection outer edge.
　なお、上記のように本発明の各実施形態及び各実施例について詳細に説明したが、本発明の新規事項及び効果から実体的に逸脱しない多くの変形が可能であることは、当業者には、容易に理解できるであろう。従って、このような変形例は、全て本発明の範囲に含まれるものとする。 Although the embodiments and examples of the present invention have been described in detail as described above, it will be understood by those skilled in the art that many modifications can be made without departing from the novel matters and effects of the present invention. It will be easy to understand. Therefore, all such modifications are included in the scope of the present invention.
　例えば、明細書又は図面において、少なくとも一度、より広義又は同義な異なる用語と共に記載された用語は、明細書又は図面のいかなる箇所においても、その異なる用語に置き換えることができる。また、非接触給電用アンテナシステム、及び電子機器の構成、動作も本発明の各実施形態及び各実施例で説明したものに限定されず、種々の変形実施が可能である。 For example, a term described together with a different term having a broader meaning or the same meaning at least once in the specification or the drawings can be replaced with the different term in any part of the specification or the drawings. Further, the configurations and operations of the non-contact power feeding antenna system and the electronic device are not limited to those described in the embodiments and examples of the present invention, and various modifications can be made.
１　非接触給電システム、１０　非接触給電用アンテナシステム、１２　送電装置（電子機器）、１４　受電装置（電子機器）、１６　送電回路、１８　送電用アンテナ装置、１９、２３　屈曲部、２０　送電用スパイラルコイル、２２　受電用アンテナ装置、２４　受電用スパイラルコイル、２６　受電回路、２８　バッテリ、３０　電源、１１９、１２３、５１９、５２３　湾曲部 DESCRIPTION OF SYMBOLS 1 Non-contact electric power feeding system, 10 Non-contact electric power feeding antenna system, 12 Power transmission device (electronic device), 14 Power receiving device (electronic device), 16 Power transmission circuit, 18 Power transmission antenna device, 19, 23 Bending part, 20 Power transmission spiral Coil, 22 Power receiving antenna device, 24 Power receiving spiral coil, 26 Power receiving circuit, 28 Battery, 30 Power supply, 119, 123, 519, 523 Curved part

Claims (6)

  1. 　電磁誘導により送電用アンテナ装置から該送電用アンテナ装置に対向する受電用アンテナ装置に非接触で電力を供給する非接触給電用アンテナシステムであって、
    　前記送電用アンテナ装置に設けられ、導線が周回して構成される送電用スパイラルコイルと、
    　前記受電用アンテナ装置に設けられ、導線が周回して構成される受電用スパイラルコイルと、を備え、
    　前記送電用スパイラルコイルと前記受電用スパイラルコイルの少なくとも何れか一方のスパイラルコイルが非平面形状に構成され、かつ、前記一方のスパイラルコイルから他方のスパイラルコイルへの投影の内縁部及び外縁部が該他方のスパイラルコイルの内縁部及び外縁部と略重複する配置となるように構成される非接触給電用アンテナシステム。     A non-contact power feeding antenna system that supplies electric power from a power transmitting antenna device to a power receiving antenna device opposed to the power transmitting antenna device by electromagnetic induction,
    A spiral coil for power transmission provided in the antenna apparatus for power transmission and configured by winding a conducting wire;
    A power receiving spiral coil provided in the power receiving antenna device and configured by winding a conductive wire;
    At least one of the spiral coil for power transmission and the spiral coil for power reception is configured in a non-planar shape, and the inner edge and the outer edge of the projection from the one spiral coil to the other spiral coil are The non-contact electric power feeding antenna system comprised so that it may become the arrangement | positioning substantially overlapped with the inner edge part and outer edge part of the other spiral coil.
  2. 　前記他方のスパイラルコイルは、その内縁部が前記投影の内縁部より内側に配置され、かつ、その外縁部が前記投影の外縁部より外側に配置される構成となっている請求項１に記載の非接触給電用アンテナシステム。 The said other spiral coil is the structure by which the inner edge part is arrange | positioned inside the inner edge part of the said projection, and the outer edge part is arrange | positioned outside the outer edge part of the said projection. Non-contact power supply antenna system.
  3. 　前記送電用スパイラルコイル及び前記受電用スパイラルコイルが略同一の曲率を有する非平面形状に構成される請求項１又は請求項２に記載の非接触給電用アンテナシステム。 The contactless power feeding antenna system according to claim 1 or 2, wherein the power transmission spiral coil and the power reception spiral coil are configured in a non-planar shape having substantially the same curvature.
  4. 　前記送電用スパイラルコイル及び前記受電用スパイラルコイルが略同一の曲率の湾曲部を有する形状に構成される請求項３に記載の非接触給電用アンテナシステム。 The non-contact power feeding antenna system according to claim 3, wherein the power transmission spiral coil and the power reception spiral coil are configured to have a curved portion having substantially the same curvature.
  5. 　前記送電用スパイラルコイル及び前記受電用スパイラルコイルが略同一の角度で屈曲した屈曲部を有する形状に構成される請求項３に記載の非接触給電用アンテナシステム。 The contactless power feeding antenna system according to claim 3, wherein the power transmitting spiral coil and the power receiving spiral coil are configured to have a bent portion that is bent at substantially the same angle.
  6. 　請求項１乃至請求項５の何れか１項に記載の非接触給電用アンテナシステムに備わる受電用スパイラルコイル又は送電用スパイラルコイルの一方が設けられる電子機器。 An electronic device provided with one of a power receiving spiral coil and a power transmitting spiral coil provided in the non-contact power feeding antenna system according to any one of claims 1 to 5.
PCT/JP2015/053089 2014-03-28 2015-02-04 Wireless power supply antenna system and electronic device WO2015146299A1 (en)

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