WO2021137367A1 - Antenna for wireless power transmission - Google Patents

Antenna for wireless power transmission Download PDF

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Publication number
WO2021137367A1
WO2021137367A1 PCT/KR2020/007731 KR2020007731W WO2021137367A1 WO 2021137367 A1 WO2021137367 A1 WO 2021137367A1 KR 2020007731 W KR2020007731 W KR 2020007731W WO 2021137367 A1 WO2021137367 A1 WO 2021137367A1
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WIPO (PCT)
Prior art keywords
coil
antenna
power transmission
wireless power
magnetic field
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PCT/KR2020/007731
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French (fr)
Korean (ko)
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이왕상
안성협
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경상국립대학교산학협력단
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Publication of WO2021137367A1 publication Critical patent/WO2021137367A1/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • 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
    • 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
    • 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
    • H01Q7/06—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 with core of ferromagnetic material

Definitions

  • the present invention relates to a wireless power transmission technology, and more particularly, to an antenna of a wireless power transmission device capable of wireless charging for mobile devices arranged in various three-dimensional directions using multiple two-dimensional planar coils.
  • the magnetic induction type wireless power transmission method currently used in real life can transmit a high-power signal, but it is 1:1 power transmission and has a short transmission distance.
  • the magnetic resonance method In the case of the magnetic resonance method, it can be applied to most modern electronic devices, can transmit multiple power of 1:N, and has a transmission distance of several meters. power transmission is required.
  • cup-type wireless charging technologies are being developed for three-dimensional wireless power transmission, there is a problem in that the advantage of multiple power transmission disappears because multiple charging is impossible.
  • the present invention has been devised to solve the above problems, and an object of the present invention is to realize a transmission coil for wireless charging in a two-dimensional plane, so that wireless power transmission for mobile devices arranged in various three-dimensional directions is performed. To provide a possible system.
  • the antenna for wireless power transmission includes a first coil that is a basic coil, a second coil disposed in the first coil, and a third coil overlapped with the second coil.
  • An antenna for wireless power transmission includes a first coil that is a basic coil in which a magnetic field is formed in one direction, and a second coil that is disposed in the first coil and has a magnetic field formed in the first direction in the other direction in the first direction. and a third coil disposed together with the second coil in the first coil and configured to generate a magnetic field in the other direction along a second direction different from the first direction in the one direction.
  • the antenna for wireless power transmission includes a first coil that is a basic coil in which a magnetic field is formed in one direction, and is disposed together with the first coil in the one direction along a specific direction in the direction opposite to the one direction. and a second coil in which a magnetic field is formed in the other direction.
  • the present invention combines multiple coils of a two-dimensional planar structure to provide high efficiency to the receiving coil of the mobile device even when the mobile devices are placed in parallel on a two-dimensional flat plate as well as in various three-dimensional directions. There is an effect of wireless power transmission.
  • FIG. 1 is a view showing a schematic configuration of a wireless power transmitter according to the present invention.
  • FIG. 2 is a diagram showing the structure of an antenna for wireless power transmission according to the first embodiment of the present invention.
  • FIG 3 is a view showing the distribution of current and magnetic field in each transmitting coil constituting the antenna for wireless power transmission according to the first embodiment of the present invention.
  • FIG. 4 is a view showing the distribution of current and magnetic field in the second coil according to the first embodiment of the present invention.
  • FIG. 5 is a view showing the distribution of current and magnetic field in the third coil according to the first embodiment of the present invention.
  • FIG. 6 is a view showing the structure of an antenna according to a second embodiment of the present invention.
  • FIG. 7 is a view showing the distribution of current and magnetic field in each transmitting coil constituting the antenna according to the second embodiment of the present invention.
  • FIG 8 is a view showing the structure of an antenna according to a third embodiment of the present invention.
  • FIG. 9 is a view showing an antenna structure according to a fourth embodiment of the present invention.
  • FIG. 10 is a view showing an antenna structure according to a fifth embodiment of the present invention.
  • FIG. 11 is a view showing a state that a mobile device is placed on a wireless charging plate composed of an antenna for wireless power transmission according to the present invention.
  • 12 to 14 are diagrams showing simulation analysis and measurement results for an antenna for wireless power transmission according to the present invention.
  • ... unit and “... module” described in the specification mean a unit that processes at least one function or operation, which may be implemented by hardware or software or a combination of hardware and software.
  • FIG. 1 shows a schematic configuration of a wireless power transmitter according to the present invention.
  • the wireless power transmitter includes an antenna 10 , a matching circuit 20 , a transmitter 30 , a controller 40 , and the like.
  • the antenna 10 is composed of a plurality of coils.
  • the antenna 10 according to the present invention has a structure in which three transmitting coils are combined.
  • the three transmitting coils include a first coil 10-1, a second coil 10-2, and a third coil 10-3.
  • the first coil 10-1 is a basic coil
  • the second coil 10-2 and the third coil 10-3 are additional coils combined with the basic coil.
  • Each coil may consist of a rectangular or circular loop antenna.
  • the matching circuit 20 is disposed in each coil to match the impedance of the transmitter 30 with each coil. That is, the impedance of the transmitter 30 is matched with the first coil 10-1 by the first matching circuit 20-1, and similarly, the second coil 10- by the second matching circuit 20-2 2) and matched with the third coil 10-3 by the third matching circuit 20-3.
  • the transmitter 30 applies transmit power to each coil and performs phase control.
  • the controller 40 controls the operation of the transmitter 30 while adjusting the transmit power and phase.
  • FIG 2 shows the structure of the antenna according to the first embodiment of the present invention.
  • the antenna according to the first embodiment includes a rectangular coil 101 as a first coil (basic coil), a reclining figure 8 coil 102 as a second coil, and a figure 8 coil 103 as a third coil. This is a combined structure.
  • the figure-eight coil 102 and figure-eight coil 103 lying down have an intersection region C (refer to FIGS. 4 and 5) passing current flowing from the first side in the opposite direction from the second side to the first coil 101 ) is formed vertically or horizontally with respect to
  • the size of the rectangular coil 101 is such that the lying figure 8 coil 102 or the figure 8 coil 103 does not overlap and can be placed inside the rectangular coil 101.
  • the figure 8 coil 102 or the figure 8 coil ( 103) is greater.
  • P1 of the square coil 102, P2 of the figure-eight coil 102 lying down, and P3 of the figure-eight coil 103 are respectively the feeding ports of the coil.
  • P1, P2, P3 When a voltage is applied through the power supply ports (P1, P2, P3), a current flows along the coil and a magnetic field is formed.
  • the square coil (P1) of 102), the feeding port (P2) of the lying figure-eight coil (102), and the feeding port (P3) of the figure-eight coil (103) are arranged at the same corner, so that the wiring for feeding can be done efficiently have.
  • FIG. 3 shows the distribution of current and magnetic field in each transmitting coil constituting the antenna for wireless power transmission according to the first embodiment of the present invention
  • FIG. 4 shows the distribution of current and magnetic field in a lying figure 8 coil
  • FIG. 5 shows the distribution of current and magnetic field in a figure 8 coil.
  • FIG. 6 shows the structure of an antenna according to a second embodiment of the present invention.
  • the antenna according to the second embodiment includes a rectangular coil 101 as a first coil (basic coil), a -45 degree coil 104 as a second coil, and a +45 degree coil 105 as a third coil. ) is a combined structure.
  • the -45 degree coil 104 and the +45 degree coil 105 have an intersecting region C, which transmits a current flowing from the first side in the opposite direction at the second side, is inclined with respect to the first coil 101, that is, It is formed with an inclination of 45 degrees.
  • the size of the square coil 101 is such that the -45 degree coil 104 or the +45 degree coil 105 can be disposed inside the square coil 101 without overlapping the -45 degree coil 104 or the +45 degree coil. larger than the coil 105 .
  • P1 of the rectangular coil 102, P2 of the -45 degree coil 104, and P3 of the 8 and +45 degree coil 105 are the feed ports of the coil, respectively.
  • P1, P2, P3 When a voltage is applied through the power supply ports (P1, P2, P3), a current flows along the coil and a magnetic field is formed.
  • a rectangular The feeding port (P1) of the coil 102, the feeding port (P2) of the -45 degree coil 104, and the feeding port (P3) of the +45 degree coil 105 are disposed at the same corner, so that the wiring for feeding efficiently can be done with
  • the magnetic field is formed in one direction ( ⁇ ) in the rectangular coil 101, while in the -45 degree coil 104, the other direction (lower left ⁇ upper right) in the first direction (lower left ⁇ upper right) in one direction ( ⁇ ) x), and in the +45 degree coil 105, a magnetic field is formed in the other direction (x) from one direction ( ⁇ ) to the second direction (bottom right ⁇ top left).
  • FIG. 8 shows the structure of the antenna according to the third embodiment of the present invention
  • FIG. 9 shows the structure of the antenna according to the fourth embodiment of the present invention
  • FIG. 10 shows the antenna structure according to the fifth embodiment of the present invention. structure is shown.
  • the antenna shown in Fig. 8 is similar to the antenna of the first embodiment except that the basic coil 106 is circular, and accordingly, the second coil 107 and the third coil 108 are also configured in a circular shape.
  • the antenna shown in FIG. 9 uses the basic coil 101 of the first embodiment, but the second coil 109 and the third coil 110 disposed in the basic coil 101 are different. That is, the power supply ports of the second coil 109 and the third coil 110 are formed in the center of the coil.
  • the antenna is configured in a structure in which the second coil 109 is disposed in the basic coil 101 and the third coil 110 is disposed in the second coil 109 .
  • the antenna shown in FIG. 10 is similar to the antenna of the fourth embodiment, except that both sides of the second coil 109 ′ and the third coil 110 ′ are folded to form a three-dimensional structure. Accordingly, when the second coil 109 ′ and the third coil 110 ′ are disposed in the basic coil 101 , the antenna has a three-dimensional structure.
  • wireless power transmission is possible no matter where the receiving coils of mobile devices placed parallel to the wireless charging plate are located using the basic coil in the antenna according to the present invention. It enables wireless power transmission.
  • the other two coils have a figure-eight structure, so the upper and lower or left and right coils have a differential phase, and the magnetic field passes from top to bottom or from left to right, so the receiving coil is positioned perpendicular to the transmitting coil. Since wireless power transmission is possible, wireless charging can be performed on receiving coils of various three-dimensional arrangements.
  • 12 to 14 are graphs illustrating simulation analysis and measurement results for an antenna for wireless power transmission according to the present invention.
  • FIG. 12 illustrates power transmission efficiency when the receiving coil of the mobile device is positioned on the xy plane. 12 , it can be seen that power transmission (S21 ⁇ -30 dB) is not performed in the conventional basic coil (single loop antenna), but 50% power transmission (S21 ⁇ -3 dB) is achieved in the antenna according to the present invention.
  • FIG. 13 shows power transmission efficiency when the receiving coil of the mobile device is positioned on the xz plane.
  • power transmission (S21 ⁇ -30 dB) is not performed in the conventional basic coil (single loop antenna), but 50% power transmission (S21 ⁇ -3 dB) is performed in the antenna according to the present invention.
  • FIG. 14 shows power transmission efficiency when the receiving coil of the mobile device is positioned on the yz plane.
  • power transmission (S21 ⁇ -30 dB) is not performed in the conventional basic coil (single loop antenna), but 50% power transmission (S21 ⁇ -3 dB) is performed in the antenna according to the present invention.

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

Abstract

The present invention relates to a wireless power transmission technology and, more specifically, to a wireless power transmission device antenna using multiple two-dimensional planar coils so as to enable wireless charging of a mobile device arranged in various three-dimensional directions. To this end, an antenna for wireless power transmission, according to the present invention, comprises: a first coil which is the base coil; a second coil arranged inside the first coil; and a third coil arranged to overlap on the second coil.

Description

무선 전력 전송을 위한 안테나Antenna for wireless power transmission
본 발명은 무선 전력 전송 기술에 관한 것으로서, 상세하게는 다중 2차원의 평면 코일을 이용하여 3차원의 다양한 방향으로 배치되는 모바일 기기에 대해 무선 충전이 가능한 무선 전력 전송 장치의 안테나에 관한 것이다. The present invention relates to a wireless power transmission technology, and more particularly, to an antenna of a wireless power transmission device capable of wireless charging for mobile devices arranged in various three-dimensional directions using multiple two-dimensional planar coils.
현재 실생활에 사용 중인 자기 유도 방식의 무선 전력 전송 방식은 대 전력의 신호가 전송될 수 있으나, 1:1 전력 전송이며 짧은 전송 거리를 가지고 있다. The magnetic induction type wireless power transmission method currently used in real life can transmit a high-power signal, but it is 1:1 power transmission and has a short transmission distance.
자기 공진 방식의 경우, 현대에 사용중인 대부분의 전자기기에 적용할 수 있고 1:N의 다중 전력 전송이 가능하며 수 m의 전송 거리를 가지고 있으나, 다양해지는 수신 기기의 특성상 3차원 공간에서의 무선 전력 전송이 필요하다. In the case of the magnetic resonance method, it can be applied to most modern electronic devices, can transmit multiple power of 1:N, and has a transmission distance of several meters. power transmission is required.
일반적인 자기 유도 방식의 경우, 모바일 기기는 2차원의 송신 코일이 있는 충전 패드 위에 평행하게 올려 놓아야 무선 전력 전송이 가능하다. In the case of a general magnetic induction method, wireless power transmission is possible only when the mobile device is placed in parallel on a charging pad with a two-dimensional transmitting coil.
한편, 3차원의 무선 전력 전송을 위하여 컵 형태의 무선 충전 기술들이 개발 되고 있지만, 이는 다수의 충전이 불가능하기 때문에 다중 전력 전송이라는 장점이 사라지게 되는 문제점이 있다. On the other hand, although cup-type wireless charging technologies are being developed for three-dimensional wireless power transmission, there is a problem in that the advantage of multiple power transmission disappears because multiple charging is impossible.
본 발명은 상기와 같은 문제점을 해결하기 위해 창안된 것으로서, 본 발명의 목적은 2차원의 평면에서 무선충전을 위한 송신 코일을 구현하여 3차원의 다양한 방향으로 배치되는 모바일 기기에 대한 무선 전력 전송이 가능한 시스템을 제공하는 것이다. The present invention has been devised to solve the above problems, and an object of the present invention is to realize a transmission coil for wireless charging in a two-dimensional plane, so that wireless power transmission for mobile devices arranged in various three-dimensional directions is performed. To provide a possible system.
이를 위해, 본 발명에 따른 무선 전력 전송을 위한 안테나는 기본 코일인 제1 코일과, 상기 제1 코일 내에 배치된 제2 코일과, 상기 제2 코일 상에 중첩 배치된 제3 코일을 포함한다. To this end, the antenna for wireless power transmission according to the present invention includes a first coil that is a basic coil, a second coil disposed in the first coil, and a third coil overlapped with the second coil.
본 발명에 따른 무선 전력 전송을 위한 안테나는 일방향으로 자기장이 형성되는 기본 코일인 제1 코일과, 상기 제1 코일 내에 배치되어 상기 일방향에서 제1 방향을 따라 타방향으로 자기장이 형성되는 제2 코일과, 상기 제1 코일 내에 상기 제2 코일과 함께 배치되어 상기 일방향에서 상기 제1 방향과 다른 제2 방향을 따라 상기 타방향으로 자기장이 형성되는 제3 코일을 포함한다. An antenna for wireless power transmission according to the present invention includes a first coil that is a basic coil in which a magnetic field is formed in one direction, and a second coil that is disposed in the first coil and has a magnetic field formed in the first direction in the other direction in the first direction. and a third coil disposed together with the second coil in the first coil and configured to generate a magnetic field in the other direction along a second direction different from the first direction in the one direction.
또한, 본 발명에 따른 무선 전력 전송을 위한 안테나는 일 방향으로 자기장이 형성되는 기본코일인 제1 코일과, 상기 제1 코일과 함께 배치되어 상기 일 방향에서 특정 방향을 따라 상기 일 방향과 반대 방향인 타 방향으로 자기장이 형성되는 제2 코일을 포함한다. In addition, the antenna for wireless power transmission according to the present invention includes a first coil that is a basic coil in which a magnetic field is formed in one direction, and is disposed together with the first coil in the one direction along a specific direction in the direction opposite to the one direction. and a second coil in which a magnetic field is formed in the other direction.
상술한 바와 같이, 본 발명은 2차원 평면 구조의 다중 코일을 조합하여 2차원 평면 판에서 모바일 기기가 평행하게 놓여 있는 경우뿐만 아니라 3차원의 다양한 방향으로 놓여 있더라도 모바일 기기의 수신 코일에 높은 효율로 무선 전력 전송을 할 수 있는 효과가 있다. As described above, the present invention combines multiple coils of a two-dimensional planar structure to provide high efficiency to the receiving coil of the mobile device even when the mobile devices are placed in parallel on a two-dimensional flat plate as well as in various three-dimensional directions. There is an effect of wireless power transmission.
도 1은 본 발명에 따른 무선 전력 전송 장치의 개략적인 구성을 나타낸 도면.1 is a view showing a schematic configuration of a wireless power transmitter according to the present invention.
도 2는 본 발명의 제1 실시예에 따른 무선 전력 전송을 위한 안테나의 구조를 나타낸 도면.2 is a diagram showing the structure of an antenna for wireless power transmission according to the first embodiment of the present invention.
도 3은 본 발명의 제1 실시예에 따른 무선 전력 전송을 위한 안테나를 구성하는 각 송신 코일에서 전류 및 자기장의 분포를 나타낸 도면.3 is a view showing the distribution of current and magnetic field in each transmitting coil constituting the antenna for wireless power transmission according to the first embodiment of the present invention.
도 4는 본 발명의 제1 실시예에 따른 제2 코일 내에서 전류 및 자기장의 분포를 나타낸 도면.4 is a view showing the distribution of current and magnetic field in the second coil according to the first embodiment of the present invention.
도 5는 본 발명의 제1 실시예에 따른 제3 코일 내에서 전류 및 자기장의 분포를 나타낸 도면.5 is a view showing the distribution of current and magnetic field in the third coil according to the first embodiment of the present invention.
도 6은 본 발명의 제2 실시예에 따른 안테나의 구조를 나타낸 도면.6 is a view showing the structure of an antenna according to a second embodiment of the present invention.
도 7은 본 발명의 제2 실시예에 따른 안테나를 구성하는 각 송신 코일에서 전류 및 자기장의 분포를 나타낸 도면.7 is a view showing the distribution of current and magnetic field in each transmitting coil constituting the antenna according to the second embodiment of the present invention.
도 8은 본 발명의 제3 실시예에 따른 안테나의 구조를 나타낸 도면.8 is a view showing the structure of an antenna according to a third embodiment of the present invention.
도 9는 본 발명의 제4 실시예에 따른 안테나 구조를 나타낸 도면.9 is a view showing an antenna structure according to a fourth embodiment of the present invention.
도 10은 본 발명의 제5 실시예에 따른 안테나 구조를 나타낸 도면.10 is a view showing an antenna structure according to a fifth embodiment of the present invention.
도 11은 본 발명에 따른 무선 전력 전송을 위한 안테나로 구성된 무선 충전 판에 모바일 기기가 놓여 있는 모습을 나타낸 도면. 11 is a view showing a state that a mobile device is placed on a wireless charging plate composed of an antenna for wireless power transmission according to the present invention.
도 12 내지 도 14는 본 발명에 따른 무선 전력 전송을 위한 안테나에 대한 모의 해석 및 측정 결과를 나타낸 도면.12 to 14 are diagrams showing simulation analysis and measurement results for an antenna for wireless power transmission according to the present invention.
아래에서는 첨부한 도면을 참고로 하여 본 발명의 실시예에 대하여 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자가 용이하게 실시할 수 있도록 상세히 설명한다. Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those of ordinary skill in the art to which the present invention pertains can easily implement them.
그러나 본 발명은 여러 가지 상이한 형태로 구현될 수 있으며 여기에서 설명하는 실시예에 한정되지 않는다. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein.
그리고 도면에서 본 발명을 명확하게 설명하기 위해서 설명과 관계없는 부분은 생략하였으며, 명세서 전체를 통하여 유사한 부분에 대해서는 유사한 도면 부호를 붙였다.And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.
명세서 전체에서, 어떤 부분이 어떤 구성 요소를 "포함"한다고 할 때, 이는 특별히 반대되는 기재가 없는 한 다른 구성 요소를 제외하는 것이 아니라 다른 구성 요소를 더 포함할 수 있는 것을 의미한다.Throughout the specification, when a part "includes" a certain component, it means that other components may be further included, rather than excluding other components, unless otherwise stated.
또한, 명세서에 기재된 "……부", "…… 모듈" 의 용어는 적어도 하나의 기능이나 동작을 처리하는 단위를 의미하며, 이는 하드웨어나 소프트웨어 또는 하드웨어 및 소프트웨어의 결합으로 구현될 수 있다.In addition, the terms "... unit" and "... module" described in the specification mean a unit that processes at least one function or operation, which may be implemented by hardware or software or a combination of hardware and software.
이하, 도면을 참조로 하여 본 발명의 실시예에 따른 무선 전력 전송을 위한 안테나의 구조에 대하여 상세히 설명한다.Hereinafter, a structure of an antenna for wireless power transmission according to an embodiment of the present invention will be described in detail with reference to the drawings.
도 1은 본 발명에 따른 무선 전력 전송 장치의 개략적인 구성을 나타낸 것이다. 1 shows a schematic configuration of a wireless power transmitter according to the present invention.
도 1을 참조하면, 무선 전력 전송 장치는 안테나(10), 정합회로(20), 송신부(30), 제어부(40) 등을 포함한다. Referring to FIG. 1 , the wireless power transmitter includes an antenna 10 , a matching circuit 20 , a transmitter 30 , a controller 40 , and the like.
안테나(10)는 복수의 코일로 구성되어 있다. 본 발명에 따른 안테나(10)는 3개의 송신 코일이 조합된 구조이다. 3개의 송신 코일은 제1 코일(10-1), 제2 코일(10-2) 및 제3 코일(10-3)로 구성되어 있다. The antenna 10 is composed of a plurality of coils. The antenna 10 according to the present invention has a structure in which three transmitting coils are combined. The three transmitting coils include a first coil 10-1, a second coil 10-2, and a third coil 10-3.
여기서 제1 코일(10-1)은 기본 코일이고, 제2 코일(10-2) 및 제3 코일(10-3)은 기본 코일과 조합되는 추가 코일이다. 각 코일은 사각형이나 원형의 루프 안테나로 구성될 수 있다. Here, the first coil 10-1 is a basic coil, and the second coil 10-2 and the third coil 10-3 are additional coils combined with the basic coil. Each coil may consist of a rectangular or circular loop antenna.
정합회로(20)는 각 코일에 배치되어 송신부(30)의 임피던스를 각 코일과 정합시킨다. 즉, 송신부(30)의 임피던스가 제1 정합회로(20-1)에 의해 제1 코일(10-1)과 정합되고, 마찬가지로 제2 정합회로(20-2)에 의해 제2 코일(10-2)과 정합되고, 제3 정합회로(20-3)에 의해 제3 코일(10-3)과 정합된다. The matching circuit 20 is disposed in each coil to match the impedance of the transmitter 30 with each coil. That is, the impedance of the transmitter 30 is matched with the first coil 10-1 by the first matching circuit 20-1, and similarly, the second coil 10- by the second matching circuit 20-2 2) and matched with the third coil 10-3 by the third matching circuit 20-3.
송신부(30)는 각 코일에 대해 송신 전력을 인가하고 위상 제어를 수행하며, 이를 위해 제어부(40)는 송신 전력 및 위상을 조절하면서 송신부(30)의 동작을 제어한다. The transmitter 30 applies transmit power to each coil and performs phase control. To this end, the controller 40 controls the operation of the transmitter 30 while adjusting the transmit power and phase.
도 2는 본 발명의 제1 실시예에 따른 안테나의 구조를 나타낸 것이다. 2 shows the structure of the antenna according to the first embodiment of the present invention.
도 2를 참조하면, 제1 실시예에 따른 안테나는 제1 코일(기본 코일)로서 사각형 코일(101), 제2 코일로서 누운 8 자형 코일(102), 제3 코일로서 8자형 코일(103)이 조합된 구조이다. Referring to FIG. 2 , the antenna according to the first embodiment includes a rectangular coil 101 as a first coil (basic coil), a reclining figure 8 coil 102 as a second coil, and a figure 8 coil 103 as a third coil. This is a combined structure.
누운 8자형 코일(102) 및 8자형 코일(103)에는 제1 측에서 흐르는 전류를 제2 측에서 반대 방향으로 전달하는 교차 영역(C)(도 4 및 도 5 참조)이 제1 코일(101)에 대해 수직 또는 수평으로 형성되어 있다. The figure-eight coil 102 and figure-eight coil 103 lying down have an intersection region C (refer to FIGS. 4 and 5) passing current flowing from the first side in the opposite direction from the second side to the first coil 101 ) is formed vertically or horizontally with respect to
누운 8자형 코일(102) 또는 8자형 코일(103)이 중첩되지 않고 사각형 코일(101)의 내부에 배치될 수 있게 사각형 코일(101)의 크기는 누운 8자형 코일(102) 또는 8자형 코일(103)보다 크다.The size of the rectangular coil 101 is such that the lying figure 8 coil 102 or the figure 8 coil 103 does not overlap and can be placed inside the rectangular coil 101. The figure 8 coil 102 or the figure 8 coil ( 103) is greater.
사각형 코일(102)의 P1, 누운 8자형 코일(102)의 P2 및 8자형 코일(103)의 P3는 각각 코일의 급전 포트이다. 급전 포트(P1, P2, P3)을 통해 전압을 인가하면 코일을 따라 전류가 흐르면서 자기장이 형성된다. P1 of the square coil 102, P2 of the figure-eight coil 102 lying down, and P3 of the figure-eight coil 103 are respectively the feeding ports of the coil. When a voltage is applied through the power supply ports (P1, P2, P3), a current flows along the coil and a magnetic field is formed.
사각형 코일(102) 내에 8자형 코일(103)이 배치되고 8자형 코일(103) 상에 누운 8자형 코일(102)이 중첩 배치되어 하나의 무선 전력 전송을 위한 안테나가 구성될 때, 사각형 코일(102)의 급전 포트(P1), 누운 8자형 코일(102)의 급전 포트(P2) 및 8자형 코일(103)의 급전 포트(P3)가 동일한 모서리에 배치되어 급전을 위한 배선을 효율적으로 할 수 있다. When the figure-eight coil 103 is disposed in the square coil 102 and the figure-eight coil 102 lying on the figure eight coil 103 is overlapped to form one wireless power transmission antenna, the square coil ( The feeding port (P1) of 102), the feeding port (P2) of the lying figure-eight coil (102), and the feeding port (P3) of the figure-eight coil (103) are arranged at the same corner, so that the wiring for feeding can be done efficiently have.
도 3은 본 발명의 제1 실시예에 따른 무선 전력 전송을 위한 안테나를 구성하는 각 송신 코일에서 전류 및 자기장의 분포를 나타내고, 도 4는 누운 8자형 코일에서 전류 및 자기장의 분포를 나타내고, 도 5는 8자형 코일에서 전류 및 자기장의 분포를 나타낸 것이다. 3 shows the distribution of current and magnetic field in each transmitting coil constituting the antenna for wireless power transmission according to the first embodiment of the present invention, and FIG. 4 shows the distribution of current and magnetic field in a lying figure 8 coil, FIG. 5 shows the distribution of current and magnetic field in a figure 8 coil.
도 3 내지 도 5를 참조하면, 누운 8자형 코일(102)의 급전 포트(P2)로 전압을 인가하면 일정한 전류가 흐르게 되지만 교차 영역(C)에서 전류를 반대 반향으로 전달하여 왼쪽과 오른쪽의 전류 방향이 반대가 되면서 자기장(M)이 왼쪽에서 오른쪽 방향으로 형성된다. 3 to 5, when a voltage is applied to the feeding port (P2) of the lying figure 8 coil 102, a constant current flows, but the current is transferred in the opposite direction in the crossing region (C) to the left and right currents As the direction is reversed, the magnetic field M is formed from left to right.
이처럼 누운 8자형 코일(102)에서 자기장이 왼쪽에서 오른쪽 방향으로 넘어가기 때문에 모바일 기기(100)의 수신 코일이 도 11의 (b)와 같이 무선 충전판(200)에 수직 방향으로 배치되어도 무선 전력 전송이 가능하게 된다. Since the magnetic field passes from left to right in the figure 8 coil 102 lying down like this, even if the receiving coil of the mobile device 100 is disposed in the vertical direction on the wireless charging plate 200 as shown in FIG. 11 ( b ), wireless power transmission becomes possible.
또한, 8차형 코일(103)의 급전 포트(P3)로 전압을 인가하면 역시 일정한 전류가 흐르게 되지만 교차 영역(C)에서 전류를 반대 반향으로 전달하여 위쪽과 아래쪽의 전류 방향이 반대가 되면서 자기장(M)이 위에서 아래로 형성된다. In addition, when a voltage is applied to the power supply port (P3) of the 8th coil 103, a constant current also flows, but the current is transferred in the opposite direction in the crossing region (C) so that the direction of the current in the upper and lower sides is reversed and the magnetic field ( M) is formed from top to bottom.
이처럼 8자형 코일(103)에서 자기장이 위에서 아래 방향으로 넘어가기 때문에 모바일 기기(200)의 수신 코일이 도 11의 (c)와 같이 무선 충전판(200)에 수직 방향으로 배치되어도 무선 전력 전송이 가능하게 된다. As such, since the magnetic field passes from the top to the bottom in the figure 8 coil 103, wireless power transmission is performed even when the receiving coil of the mobile device 200 is disposed in the vertical direction on the wireless charging plate 200 as shown in FIG. 11(c). it becomes possible
도 6은 본 발명의 제2 실시예에 따른 안테나의 구조를 나타낸 것이다. 6 shows the structure of an antenna according to a second embodiment of the present invention.
도 6을 참조하면, 제2 실시예에 따른 안테나는 제1 코일(기본 코일)로서 사각형 코일(101), 제2 코일로서 -45도 코일(104), 제3 코일로서 +45도 코일(105)이 조합된 구조이다. Referring to FIG. 6 , the antenna according to the second embodiment includes a rectangular coil 101 as a first coil (basic coil), a -45 degree coil 104 as a second coil, and a +45 degree coil 105 as a third coil. ) is a combined structure.
-45도 코일(104) 및 +45도 코일(105)이에는 제1 측에서 흐르는 전류를 제2 측에서 반대 방향으로 전달하는 교차 영역(C)이 제1 코일(101)에 대해 경사지게 즉, 45도의 경사를 가지고 형성되어 있다. The -45 degree coil 104 and the +45 degree coil 105 have an intersecting region C, which transmits a current flowing from the first side in the opposite direction at the second side, is inclined with respect to the first coil 101, that is, It is formed with an inclination of 45 degrees.
-45도 코일(104) 또는 +45도 코일(105)이 중첩되지 않고 사각형 코일(101)의 내부에 배치될 수 있게 사각형 코일(101)의 크기는 -45도 코일(104) 또는 +45도 코일(105)보다 크다.The size of the square coil 101 is such that the -45 degree coil 104 or the +45 degree coil 105 can be disposed inside the square coil 101 without overlapping the -45 degree coil 104 or the +45 degree coil. larger than the coil 105 .
사각형 코일(102)의 P1, -45도 코일(104)의 P2 및 8 및 +45도 코일(105)의 P3는 각각 코일의 급전 포트이다. 급전 포트(P1, P2, P3)을 통해 전압을 인가하면 코일을 따라 전류가 흐르면서 자기장이 형성된다. P1 of the rectangular coil 102, P2 of the -45 degree coil 104, and P3 of the 8 and +45 degree coil 105 are the feed ports of the coil, respectively. When a voltage is applied through the power supply ports (P1, P2, P3), a current flows along the coil and a magnetic field is formed.
사각형 코일(102) 내에 -45도 코일(104)이 배치되고 -45도 코일(104) 상에 +45도 코일(105)이 중첩 배치되어 하나의 무선 전력 전송을 위한 안테나가 구성될 때, 사각형 코일(102)의 급전 포트(P1), -45도 코일(104)의 급전 포트(P2) 및 +45도 코일(105)의 급전 포트(P3)가 동일한 모서리에 배치되어 급전을 위한 배선을 효율적으로 할 수 있다. When the -45 degree coil 104 is disposed in the rectangular coil 102 and the +45 degree coil 105 is overlapped on the -45 degree coil 104 to constitute one antenna for wireless power transmission, a rectangular The feeding port (P1) of the coil 102, the feeding port (P2) of the -45 degree coil 104, and the feeding port (P3) of the +45 degree coil 105 are disposed at the same corner, so that the wiring for feeding efficiently can be done with
도 7은 본 발명의 제2 실시예에 따른 무선 전력 전송을 위한 안테나를 구성하는 각 송신 코일에서 전류 및 자기장의 분포를 나타낸 것이다. 7 shows the distribution of current and magnetic field in each transmitting coil constituting the antenna for wireless power transmission according to the second embodiment of the present invention.
도 7을 참조하면, 사각형 코일(101)에서는 일방향(⊙)으로 자기장이 형성되어 있는 반면, -45도 코일(104)에서는 일방향(⊙)에서 제1 방향(좌하 → 우상)을 따라 타방향(ⓧ)으로 자기장이 형성되어 있으며, +45도 코일(105)에서는 일방향(⊙)에서 제2 방향(우하 → 좌상)으로 따라 타방향(ⓧ)으로 자기장이 형성되어 있다. Referring to FIG. 7 , the magnetic field is formed in one direction (⊙) in the rectangular coil 101, while in the -45 degree coil 104, the other direction (lower left → upper right) in the first direction (lower left → upper right) in one direction (⊙) ⓧ), and in the +45 degree coil 105, a magnetic field is formed in the other direction (ⓧ) from one direction (⊙) to the second direction (bottom right → top left).
이처럼 -45도 코일(104)과 +45도 코일(105)에서 각각 제1 방향 및 제2 방향을 따라 자기장이 넘어가기 때문에 모바일 기기의 수신 코일이 방향을 달리하여 수직 방향으로 배치되어도 무선 전력 전송이 가능하게 된다. As such, since the magnetic field passes in the first direction and the second direction in the -45 degree coil 104 and the +45 degree coil 105, respectively, wireless power transmission is performed even if the receiving coil of the mobile device is disposed in a vertical direction with different directions This becomes possible.
도 8은 본 발명의 제3 실시예에 따른 안테나의 구조를 나타내고, 도 9는 본 발명의 제4 실시예에 따른 안테나의 구조를 나타내고, 도 10은 본 발명의 제5 실시예에 따른 안테나의 구조를 나타낸 것이다. 8 shows the structure of the antenna according to the third embodiment of the present invention, FIG. 9 shows the structure of the antenna according to the fourth embodiment of the present invention, and FIG. 10 shows the antenna structure according to the fifth embodiment of the present invention. structure is shown.
도 8에 도시된 안테나는 제1 실시예의 안테나와 유사하나 기본 코일(106)이 원형으로 되어 있다는 점이 다르며 이에 따라 제2 코일(107) 및 제3 코일(108)도 원형으로 구성되어 있다. The antenna shown in Fig. 8 is similar to the antenna of the first embodiment except that the basic coil 106 is circular, and accordingly, the second coil 107 and the third coil 108 are also configured in a circular shape.
도 9에 도시된 안테나는 제1 실시예의 기본 코일(101)을 사용하되 기본 코일(101) 내에 배치되는 제2 코일(109) 및 제3 코일(110)이 다르다. 즉, 제2 코일(109) 및 제3 코일(110)의 급전 포트가 코일의 중심에 형성되어 있다. The antenna shown in FIG. 9 uses the basic coil 101 of the first embodiment, but the second coil 109 and the third coil 110 disposed in the basic coil 101 are different. That is, the power supply ports of the second coil 109 and the third coil 110 are formed in the center of the coil.
그리고 기본 코일(101) 내에 제2 코일(109)이 배치되어 있고 제2 코일(109) 내에 제3 코일(110)이 배치된 구조로 안테나를 구성하고 있다. In addition, the antenna is configured in a structure in which the second coil 109 is disposed in the basic coil 101 and the third coil 110 is disposed in the second coil 109 .
또한, 도 10에 도시된 안테나도 제4 실시예의 안테나와 유사하나 제2 코일(109') 및 제3 코일(110')의 양측면이 접혀져 있어서 입체적으로 구성되어 있다는 점이 다르다. 이에 따라 기본 코일(101) 내에 제2 코일(109') 및 제3 코일(110')을 배치하게 되면 안테나가 3차원 구조가 된다. Also, the antenna shown in FIG. 10 is similar to the antenna of the fourth embodiment, except that both sides of the second coil 109 ′ and the third coil 110 ′ are folded to form a three-dimensional structure. Accordingly, when the second coil 109 ′ and the third coil 110 ′ are disposed in the basic coil 101 , the antenna has a three-dimensional structure.
이와 같이 무선 충전 판에 2차원 구조의 코일을 조합하여 수신 코일의 3차원의 다양한 배치에 관계없이 무선 전력 전송이 가능하게 된다. In this way, by combining the coil of the two-dimensional structure with the wireless charging plate, wireless power transmission is possible regardless of the various three-dimensional arrangement of the receiving coil.
본 발명에 따른 안테나에서 기본 코일을 이용해 무선 충전판에 평행하게 놓여 있는 모바일 기기들의 수신 코일이 어디에 위치하더라도 무선 전력 전송이 가능하며, 수신 코일이 평행하지 않고 수직으로 놓여 있는 경우에는 나머지 두 코일을 이용해 무선 전력 전송이 가능하게 된다. In the antenna according to the present invention, wireless power transmission is possible no matter where the receiving coils of mobile devices placed parallel to the wireless charging plate are located using the basic coil in the antenna according to the present invention. It enables wireless power transmission.
나머지 두 코일은 8자 형태의 구조를 가짐으로써 위쪽과 아래쪽 또는 왼쪽과 오른쪽의 코일이 차동의 위상을 가지게 되어서 자기장이 위쪽에서 아래쪽으로 또는 왼쪽에서 오른쪽으로 넘어가게 되어서 송신 코일과 수직으로 위치한 수신 코일에 무선 전력 전송이 가능하므로 다양한 3차원 배치의 수신 코일에 무선 충전을 할 수 있다. The other two coils have a figure-eight structure, so the upper and lower or left and right coils have a differential phase, and the magnetic field passes from top to bottom or from left to right, so the receiving coil is positioned perpendicular to the transmitting coil. Since wireless power transmission is possible, wireless charging can be performed on receiving coils of various three-dimensional arrangements.
시뮬레이션 결과Simulation results
도 12 내지 도 14는 본 발명에 따른 무선 전력 전송을 위한 안테나에 대한 모의 해석 및 측정 결과를 나타낸 그래프이다. 12 to 14 are graphs illustrating simulation analysis and measurement results for an antenna for wireless power transmission according to the present invention.
도 12는 모바일 기기의 수신 코일이 xy 평면에 위치했을 때의 전력 전송 효율을 나타낸 것이다. 도 12를 참조하면, 종래 기본코일(단일 루프 안테나)에서는 전력 전송(S21 < -30dB)이 되지 않지만, 본 발명에 따른 안테나에서는 50% 전력 전송(S21 ≒ -3dB)이 이루어짐을 알 수 있다. 12 illustrates power transmission efficiency when the receiving coil of the mobile device is positioned on the xy plane. 12 , it can be seen that power transmission (S21 < -30 dB) is not performed in the conventional basic coil (single loop antenna), but 50% power transmission (S21 ≒ -3 dB) is achieved in the antenna according to the present invention.
또한, 도 13은 모바일 기기의 수신 코일이 xz 평면에 위치했을 때의 전력 전송 효율을 나타낸 것이다. 도 13을 참조하면, 종래 기본코일(단일 루프 안테나)에서는 전력 전송(S21 < -30dB)이 되지 않지만, 본 발명에 따른 안테나에서는 50% 전력 전송(S21 ≒ -3dB)이 이루어짐을 알 수 있다. Also, FIG. 13 shows power transmission efficiency when the receiving coil of the mobile device is positioned on the xz plane. Referring to FIG. 13, power transmission (S21 < -30 dB) is not performed in the conventional basic coil (single loop antenna), but 50% power transmission (S21 ≒ -3 dB) is performed in the antenna according to the present invention.
또한, 도 14는 모바일 기기의 수신 코일이 yz 평면에 위치했을 때의 전력 전송 효율을 나타낸 것이다. 도 14를 참조하면, 종래 기본코일(단일 루프 안테나)에서는 전력 전송(S21 < -30dB)이 되지 않지만, 본 발명에 따른 안테나에서는 50% 전력 전송(S21 ≒ -3dB)이 이루어짐을 알 수 있다. Also, FIG. 14 shows power transmission efficiency when the receiving coil of the mobile device is positioned on the yz plane. Referring to FIG. 14, power transmission (S21 < -30 dB) is not performed in the conventional basic coil (single loop antenna), but 50% power transmission (S21 ≒ -3 dB) is performed in the antenna according to the present invention.
이상의 설명은 본 발명을 예시적으로 설명한 것에 불과하며, 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자에 의해 본 발명의 기술적 사상에서 벗어나지 않는 범위에서 다양한 변형이 가능할 것이다. The above description is merely illustrative of the present invention, and various modifications may be made by those of ordinary skill in the art to which the present invention pertains without departing from the technical spirit of the present invention.
따라서 본 발명의 명세서에 개시된 실시예들은 본 발명을 한정하는 것이 아니다. 본 발명의 범위는 아래의 특허청구범위에 의해 해석되어야 하며, 그와 균등한 범위 내에 있는 모든 기술도 본 발명의 범위에 포함되는 것으로 해석해야 할 것이다. Accordingly, the embodiments disclosed in the specification of the present invention are not intended to limit the present invention. The scope of the present invention should be construed by the following claims, and all technologies within the scope equivalent thereto should be construed as being included in the scope of the present invention.
무선 충전 패드를 비롯하여 다양한 생활 용품의 충전에 널리 활용될 수 있다. It can be widely used for charging various household items, including wireless charging pads.

Claims (10)

  1. 기본 코일인 제1 코일과,a first coil which is a basic coil; and
    상기 제1 코일 내에 배치된 제2 코일과,a second coil disposed within the first coil;
    상기 제2 코일 상에 중첩 배치된 제3 코일을 포함하는 무선 전력 전송을 위한 안테나, An antenna for wireless power transmission including a third coil superimposed on the second coil;
  2. 제1항에 있어서, According to claim 1,
    상기 제1 코일은 사각형 또는 원형의 루프 안테나인 것을 특징으로 하는 무선 전력 전송을 위한 안테나.The first coil is an antenna for wireless power transmission, characterized in that the rectangular or circular loop antenna.
  3. 제2항에 있어서,3. The method of claim 2,
    상기 제2 코일 내에서 자기장이 좌측에서 우측으로 또는 우측에서 좌측으로 형성되도록 제 1측에 흐르는 전류를 제2 측에 반대 방향으로 전달하는 교차 영역이 형성되어 있는 것을 특징으로 하는 무선 전력 전송을 위한 안테나. For wireless power transmission, characterized in that in the second coil, an intersection region for passing a current flowing in the first side in the opposite direction to the second side is formed so that a magnetic field is formed from left to right or from right to left antenna.
  4. 제2항에 있어서,3. The method of claim 2,
    상기 제3 코일 내에서 자기장이 위에서 아래로 또는 아래에서 위로 형성되도록 제1 측에 흐르는 전류를 제2 측에 반대 방향으로 전달하는 교차 영역이 형성되어 있는 것을 특징으로 하는 무선 전력 전송을 위한 안테나. Antenna for wireless power transmission, characterized in that in the third coil, an intersecting region for transmitting a current flowing in the first side in the opposite direction to the second side is formed so that a magnetic field is formed from top to bottom or from bottom to top.
  5. 일방향으로 자기장이 형성되는 기본 코일인 제1 코일과,A first coil, which is a basic coil in which a magnetic field is formed in one direction, and
    상기 제1 코일 내에 배치되어 상기 일방향에서 제1 방향을 따라 타방향으로 자기장이 형성되는 제2 코일과,a second coil disposed in the first coil and having a magnetic field formed in the first direction in the other direction along the first direction;
    상기 제1 코일 내에 상기 제2 코일과 함께 배치되어 상기 일방향에서 상기 제1 방향과 다른 제2 방향을 따라 상기 타방향으로 자기장이 형성되는 제3 코일을 포함하는 무선 전력 전송을 위한 안테나, An antenna for wireless power transmission including a third coil disposed together with the second coil in the first coil and having a magnetic field formed in the other direction along a second direction different from the first direction in the one direction;
  6. 제5항에 있어서,6. The method of claim 5,
    상기 제2 코일 또는 상기 제3 코일에서 제1 측에 흐르는 전류를 제2 측에 반대 방향으로 전달하는 교차 영역이 형성되어 있는 것을 특징으로 하는 무선 전력 전송을 위한 안테나. Antenna for wireless power transmission, characterized in that in the second coil or the third coil, an intersecting area for transferring a current flowing to the first side in the opposite direction to the second side is formed.
  7. 제6항에 있어서,7. The method of claim 6,
    상기 교차 영역이 상기 제2 코일 또는 상기 제3 코일에서 상기 제1 코일에 대해 수직 또는 평행하게 형성되어 있는 것을 특징으로 하는 무선 전력 전송을 위한 안테나. The antenna for wireless power transmission, characterized in that the crossing area is formed perpendicularly or parallel to the first coil in the second coil or the third coil.
  8. 제6항에 있어서,7. The method of claim 6,
    상기 교차 영역이 상기 제2 코일 또는 상기 제3 코일에서 상기 제1 코일에 대해 경사지게 형성되어 있는 것을 특징으로 하는 무선 전력 전송을 위한 안테나. The antenna for wireless power transmission, characterized in that the crossing area is formed to be inclined with respect to the first coil in the second coil or the third coil.
  9. 제5항에 있어서,6. The method of claim 5,
    상기 제1 코일 내에 상기 제2 코일 및 상기 제3 코일이 배치될 때 상기 제1 코일의 급전 포트, 상기 제2 코일의 급전 포트 및 상기 제3 코일의 급전 포트가 동일한 모서리에 배치되는 것을 특징으로 하는 무선 전력 전송을 위한 안테나. When the second coil and the third coil are disposed in the first coil, the feeding port of the first coil, the feeding port of the second coil, and the feeding port of the third coil are disposed at the same corner Antenna for wireless power transmission.
  10. 일 방향으로 자기장이 형성되는 기본코일인 제1 코일과,A first coil that is a basic coil in which a magnetic field is formed in one direction;
    상기 제1 코일과 함께 배치되어 상기 일 방향에서 특정 방향을 따라 상기 일 방향과 반대 방향인 타 방향으로 자기장이 형성되는 제2 코일을 포함하는 무선 전력 전송을 위한 안테나. An antenna for wireless power transmission comprising a second coil disposed together with the first coil to form a magnetic field in the other direction opposite to the one direction along a specific direction in the one direction.
PCT/KR2020/007731 2019-12-30 2020-06-15 Antenna for wireless power transmission WO2021137367A1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012161062A (en) * 2011-02-03 2012-08-23 Murata Mfg Co Ltd Antenna and rfid device
JP2018023019A (en) * 2016-08-04 2018-02-08 株式会社村田製作所 Antenna device, antenna module and electronic apparatus
US20180287433A1 (en) * 2013-06-27 2018-10-04 Lg Innotek Co., Ltd. Receiving antenna and wireless power receiving device including the same
KR20180109493A (en) * 2017-03-28 2018-10-08 주식회사 아모그린텍 Low frequency Antenna module
KR20180127282A (en) * 2018-11-20 2018-11-28 엘지이노텍 주식회사 Wiress antenna for wireless charging and nfc communication, and wireless device having the same

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6206578B2 (en) * 2014-03-14 2017-10-04 株式会社村田製作所 Power receiving coil structure and wireless power feeding system
KR20160082124A (en) * 2014-12-31 2016-07-08 삼성전기주식회사 Coil structure for power transmiting, and apparatus for wireless power transmiting using the same
US10374459B2 (en) * 2015-03-29 2019-08-06 Chargedge, Inc. Wireless power transfer using multiple coil arrays
US10693308B2 (en) 2016-09-23 2020-06-23 Apple Inc. Interconnections for multi-layer transmitter coil arrangements in wireless charging mats
KR102503650B1 (en) * 2017-05-23 2023-02-27 주식회사 아모센스 wireless power transmission module

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012161062A (en) * 2011-02-03 2012-08-23 Murata Mfg Co Ltd Antenna and rfid device
US20180287433A1 (en) * 2013-06-27 2018-10-04 Lg Innotek Co., Ltd. Receiving antenna and wireless power receiving device including the same
JP2018023019A (en) * 2016-08-04 2018-02-08 株式会社村田製作所 Antenna device, antenna module and electronic apparatus
KR20180109493A (en) * 2017-03-28 2018-10-08 주식회사 아모그린텍 Low frequency Antenna module
KR20180127282A (en) * 2018-11-20 2018-11-28 엘지이노텍 주식회사 Wiress antenna for wireless charging and nfc communication, and wireless device having the same

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