WO2021137367A1 - Antenne de transmission de puissance sans fil - Google Patents

Antenne de transmission de puissance sans fil 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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WO
WIPO (PCT)
Prior art keywords
coil
antenna
power transmission
wireless power
magnetic field
Prior art date
Application number
PCT/KR2020/007731
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English (en)
Korean (ko)
Inventor
이왕상
안성협
Original Assignee
경상국립대학교산학협력단
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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Publication date
Application filed by 경상국립대학교산학협력단 filed Critical 경상국립대학교산학협력단
Publication of WO2021137367A1 publication Critical patent/WO2021137367A1/fr

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

La présente invention se rapporte à une technologie de transmission de puissance sans fil et, plus particulièrement, concerne une antenne de dispositif de transmission de puissance sans fil faisant appel à de multiples bobines planes bidimensionnelles de façon à permettre la charge sans fil d'un dispositif mobile disposé dans diverses directions tridimensionnelles. À cet effet, une antenne de transmission de puissance sans fil, selon la présente invention, comprend : une première bobine qui est la bobine de base; une deuxième bobine disposée à l'intérieur de la première bobine; et une troisième bobine disposée de façon à chevaucher la deuxième bobine.
PCT/KR2020/007731 2019-12-30 2020-06-15 Antenne de transmission de puissance sans fil WO2021137367A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2019-0178393 2019-12-30
KR1020190178393A KR102302764B1 (ko) 2019-12-30 2019-12-30 무선 전력 전송을 위한 안테나

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WO2021137367A1 true WO2021137367A1 (fr) 2021-07-08

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WO (1) WO2021137367A1 (fr)

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Publication number Priority date Publication date Assignee Title
KR20230013956A (ko) * 2021-07-20 2023-01-27 삼성전자주식회사 복수의 송신 코일들을 이용하여 전력 송신 방향을 제어하는 무선 전력 송신기 및 그 제어 방법

Citations (5)

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Publication number Priority date Publication date Assignee Title
JP2012161062A (ja) * 2011-02-03 2012-08-23 Murata Mfg Co Ltd アンテナおよびｒｆｉｄデバイス
JP2018023019A (ja) * 2016-08-04 2018-02-08 株式会社村田製作所 アンテナ装置、アンテナモジュールおよび電子機器
US20180287433A1 (en) * 2013-06-27 2018-10-04 Lg Innotek Co., Ltd. Receiving antenna and wireless power receiving device including the same
KR20180109493A (ko) * 2017-03-28 2018-10-08 주식회사 아모그린텍 저주파 안테나 모듈
KR20180127282A (ko) * 2018-11-20 2018-11-28 엘지이노텍 주식회사 무선 충전과 nfc 통신을 위한 무선 안테나 및 이를 적용한 무선 단말기

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JP6206578B2 (ja) * 2014-03-14 2017-10-04 株式会社村田製作所 受電用コイル構造体およびワイヤレス給電システム
KR20160082124A (ko) * 2014-12-31 2016-07-08 삼성전기주식회사 전력 송신 코일 구조 및 그를 이용한 무선 전력 송신 장치
EP3308388A4 (fr) * 2015-03-29 2018-12-19 ChargEdge, Inc. Transfert de puissance sans fil à l'aide de réseaux de bobines multiples
US10714951B2 (en) 2016-09-23 2020-07-14 Apple Inc. Structural framework for wireless charging mats
KR102503650B1 (ko) * 2017-05-23 2023-02-27 주식회사 아모센스 무선전력 송신모듈

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012161062A (ja) * 2011-02-03 2012-08-23 Murata Mfg Co Ltd アンテナおよびｒｆｉｄデバイス
US20180287433A1 (en) * 2013-06-27 2018-10-04 Lg Innotek Co., Ltd. Receiving antenna and wireless power receiving device including the same
JP2018023019A (ja) * 2016-08-04 2018-02-08 株式会社村田製作所 アンテナ装置、アンテナモジュールおよび電子機器
KR20180109493A (ko) * 2017-03-28 2018-10-08 주식회사 아모그린텍 저주파 안테나 모듈
KR20180127282A (ko) * 2018-11-20 2018-11-28 엘지이노텍 주식회사 무선 충전과 nfc 통신을 위한 무선 안테나 및 이를 적용한 무선 단말기

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KR102355945B1 (ko) 2022-01-25
KR20210085399A (ko) 2021-07-08
KR20210086579A (ko) 2021-07-08
KR102302764B1 (ko) 2021-09-15

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