WO2012091209A1 - Système de transmission de puissance sans fil à nœuds multiples utilisant une induction par résonance magnétique, et dispositif de chargement sans fil - Google Patents

Système de transmission de puissance sans fil à nœuds multiples utilisant une induction par résonance magnétique, et dispositif de chargement sans fil Download PDF

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Publication number
WO2012091209A1
WO2012091209A1 PCT/KR2011/000529 KR2011000529W WO2012091209A1 WO 2012091209 A1 WO2012091209 A1 WO 2012091209A1 KR 2011000529 W KR2011000529 W KR 2011000529W WO 2012091209 A1 WO2012091209 A1 WO 2012091209A1
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WO
WIPO (PCT)
Prior art keywords
power
wireless
matching
switch
wireless charging
Prior art date
Application number
PCT/KR2011/000529
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English (en)
Korean (ko)
Inventor
황규성
임승옥
원윤재
김선희
문연국
Original Assignee
전자부품연구원
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Application filed by 전자부품연구원 filed Critical 전자부품연구원
Publication of WO2012091209A1 publication Critical patent/WO2012091209A1/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
    • H02J50/20—Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
    • 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
    • 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
    • H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and 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
    • H02J50/90—Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
    • H04B5/24—Inductive coupling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
    • H04B5/79—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for data transfer in combination with power transfer

Definitions

  • the present invention relates to a wireless power transfer system, and more particularly, to a multi-node wireless power transfer system and a wireless charger using a magnetic resonance induction method capable of selectively charging a plurality of wireless chargers.
  • a wireless charging system using magnetic induction is used as a wireless power transmission technology for wirelessly transmitting energy.
  • the magnetic induction method of inducing current through a magnetic field from one coil to another is very sensitive to the distance and relative position between the coils, so that the transmission efficiency drops rapidly even if the distance between the two coils is slightly dropped or twisted. Accordingly, this magnetic induction charging system can only be used in a short distance of several cm or less.
  • US Patent 7,741,735 discloses a non-radiative energy transfer method based on the attenuation wave coupling of the resonant field. This is because two resonators with the same frequency do not affect other non-resonators around them, but they tend to couple with each other and are introduced as a technology that can transfer energy over a long distance compared to conventional electromagnetic induction. .
  • the present invention has been made in view of the above-described technical background, and a subject thereof is to provide a multi-node wireless power transmission system of a self-resonance induction method capable of selectively charging a plurality of wireless chargers.
  • a switch is installed in the power converter of the wireless charger to turn on / off the corresponding switch to turn on / off the power receiving function of the wireless charger.
  • a wireless charger includes a wireless charger that receives power from an external wireless power transmitter in a self-resonance induction manner, and includes: a receiving antenna for receiving wireless power transmitted from the wireless power transmitter; Rectifier for rectifying the power supplied through the antenna, a power control switch connected to the rear end of the rectifier, and one end is connected to the power control switch and the other end is a DC-DC converter connected to the load.
  • the wireless charger may further include a matching network connected to the receiving antenna, wherein the matching network includes a matching circuit for matching a resonant frequency between the wireless power transmitter and the wireless charger, and the matching circuit.
  • the matching network includes a matching circuit for matching a resonant frequency between the wireless power transmitter and the wireless charger, and the matching circuit.
  • a power control capacitor connected in parallel, and a matching switch having one end connected with the matching circuit and the other end connected with the power control capacitor, wherein the wireless charger includes the matching switch, the power control switch, or The ON / OFF control of both the matching switch and the power control switch controls the transfer of power to the load.
  • the power control capacitor preferably has a capacity of 2 to 10 times the capacitance of the matching circuit, and the wireless charger may further include a magnetic field communication modem connected to the receiving antenna.
  • a wireless charger includes a wireless charger for receiving power from an external wireless power transmitter in a self-resonance induction manner, comprising: a receiving antenna for receiving wireless power transmitted from the wireless power transmitter; A matching circuit connected to a receiving antenna and matching a resonant frequency between the wireless power transmitter and the wireless charger, a power control capacitor connected in parallel with the matching circuit, and one end connected to the matching circuit.
  • a matching network including a matching switch connected at the other end to the power control capacitor, a rectifier connected to the matching network to rectify the power supplied through the receiving antenna, and one end connected to the rectifier and the other end to a load. It includes a DC-DC converter connected with.
  • the wireless power transmitter receives information from a plurality of wireless chargers and selects and charges a target device to be charged based on the information. Can control the group.
  • FIG. 1 is a block diagram schematically showing the overall configuration of a multi-node wireless energy transmission system using a magnetic resonance induction method according to an embodiment of the present invention.
  • FIG. 2 is a block diagram schematically showing the overall configuration of a wireless charger according to an embodiment of the present invention.
  • FIG. 3 is a flowchart illustrating a selective charging method according to an embodiment of the present invention.
  • FIGS. 4, 5, and 7 are block diagrams illustrating the configuration of a power management unit of the wireless charger according to various embodiments of the present invention, respectively.
  • FIG. 6 is a diagram illustrating a configuration of a receiving antenna and an adaptive matching network according to an embodiment of the present invention.
  • FIG. 8 is a block diagram illustrating a configuration of a receiving antenna unit of a wireless charger according to another embodiment of the present invention.
  • a multi-node wireless energy transmission system using a magnetic resonance induction method includes a wireless power supply device 100 that wirelessly supplies power through a magnetic resonance induction method, and wireless power. Located a distance away from the supply device 100 by a predetermined distance and comprises a plurality of wireless chargers (200_1, 200_2, ..., 200_N) that is wirelessly supplied power from the wireless power supply (100).
  • Magnetic resonance induction is a method of maximizing the wireless transmission efficiency of energy by the resonance between the transmitting antenna and the receiving antenna.
  • a resonance channel is formed by matching a resonance frequency between the wireless power supply device 100 and the wireless charger 200 to transmit wireless power.
  • the wireless power supply device 100 includes a wireless charger 200_1, 200_2, including identification information, type, location, or state of charge of the charger through magnetic field communication with the wireless charger 200_1, 200_2, .., 200_N. ..., 200_N) may be received, and power may be transmitted to the wireless chargers 200_1, 200_2,..., 200_N based on the charging information.
  • the wireless chargers 200_1, 200_2, .., 200_N may include all digital devices including batteries such as various mobile terminals, digital cameras, and notebook computers, and are not easily accessible from underground, underwater, and inside buildings. It may also be an electronic device such as a sensor and a measuring instrument.
  • the wireless charger 200 receives a power and data from a wireless power supply device 100 using a magnetic resonance induction method, and a wireless power supply using a magnetic field communication protocol.
  • the components of the wireless charger 200 including the magnetic field communication modem 230 for performing magnetic field communication with the device 100, the power management unit 220 for managing power reception, the power management unit and the magnetic field communication modem 230,
  • the control unit 240 to control, including the battery 250 is charged using the received power.
  • FIG. 3 is a flowchart of a method for selectively charging each wireless charger in a multi-node wireless energy transfer system using a magnetic resonance induction method according to an embodiment of the present invention.
  • identification information of the charger is received from each of the wireless chargers 200_1, 200_2,..., 200_N (S320). At this time, in addition to the identification information of the charger may be further received information such as the type, location, or state of charge of the charger.
  • the wireless power supply device 100 selects a device to be charged (S330).
  • the charging target device may be selected in various ways, and one or more charging target devices may be selected.
  • the wireless power supply device 100 transmits an ON / OFF command to each wireless charger (S340). According to the received ON / OFF command, each wireless charger turns on / off the power receiving function, and the wireless power supply device 100 selectively transmits power as it transmits power (S350).
  • the power reception function can be turned off to effectively implement a multi-node wireless energy transmission system. That is, when selectively charging only one of a plurality of wireless chargers included in the multi-node wireless energy transmission system, when the power of the charger is cut off to prevent charging to another wireless charger, the corresponding wireless charger itself Compared to this, it becomes very uncomfortable to use, and as in the embodiment of the present invention, only the power receiving function is turned off to selectively charge such a inconvenience can be eliminated.
  • the embodiment of the present invention controls the ON / OFF of the power reception function through the circuit control of the receiver (wireless charger).
  • the configuration of the power management unit provided in each wireless charger of the multi-node wireless energy transfer system using the magnetic resonance induction method according to an embodiment of the present invention will be described in detail.
  • 4 to 6 are block diagrams illustrating various configurations of the power management unit of the wireless charger according to the embodiment of the present invention.
  • the power manager 220_1 includes a matching network 221, a rectifier 222, a power control switch 223, and a DC-DC converter 224.
  • the DC-DC converter 224 is connected to a load (FIG. 2: 250), that is, a battery, etc. outside the power manager 220_1, and the power control switch 223 is connected to the controller (FIG. 2: 240) to control the controller (FIG. 2). : It operates by receiving ON / OFF switching signal from 240).
  • the matching network 221 adjusts the frequency so that the wireless power supply device 100 and the wireless charger 200 resonate, and performs impedance matching between the reception antenna 210 and the wireless charger 200.
  • the RF power received through the matching network 221 is converted into DC power through the rectifier 222, the DC-DC converter 224 converts it to a voltage for each load and provides it. That is, the rectifier 222 and the DC-DC converter 224 correspond to a power converter that converts the received RF power into DC power suitable for each load.
  • the power control switch 223 is located between the rectifier 222 and the DC-DC converter 224, by turning on / off this power control switch 223 to turn on the charging function of the wireless charger 200. You can / OFF.
  • the received power is transferred to the load through the rectifier 222 and the DC-DC converter 224, but when the power control switch 223 is OFF, the received power is cut off. Since it is not consumed in the wireless charger 200, the energy corresponding to the received power is bounced back to other wireless chargers around to be used to charge another wireless charger.
  • FIG. 5 shows a configuration of a power management unit according to another embodiment.
  • a switch is installed in a matching network instead of a power control switch between a rectifier and a DC-DC converter.
  • the power manager 220_2 instead of the matching network 221 shown in FIG. 4, an adaptive matching network 225 capable of adjusting frequency matching as needed. ). That is, the power manager 220_2 includes an adaptive matching network 225, a rectifier 222, and a DC-DC converter 224.
  • the DC-DC converter 224 is connected with a load (Fig. 2: 250) as in the embodiment of Fig. 4.
  • the configuration of the adaptive matching network 225 is shown in detail in FIG.
  • the adaptive matching network 225 may change the capacitance of the entire adaptive matching network 225 by connecting additional capacitors 227 in parallel to the matching circuit to switch connections with the corresponding capacitor 227.
  • Cr is a capacitor for matching resonance with the wireless power supply device 100
  • Cm is a capacitor for impedance matching.
  • the capacitor Ct 227 for adjusting the resonance frequency is further connected and controlled using the switch 226.
  • the adaptive matching network 225 is configured to perform frequency matching with the wireless power supply device 100 when the switch 226 is turned off, the receiving antenna 210 is connected from the wireless power supply device 100. Receives wireless power and delivers it to rectifier 222. On the contrary, since the frequencies of the wireless power supply 100 and the wireless charger 200 do not match when the switch 226 is in an ON state, resonance does not occur between the wireless power supply 100 and the wireless charger 200. .
  • the capacitance of the capacitor 227 by adjusting the capacitance of the capacitor 227, the function as the charge function ON / OFF switch can be optimized.
  • the capacitor 227 has a capacity of 2 to 10 times the capacitance of the matching circuit.
  • the power manager 220_3 includes an adaptive matching network 225, a rectifier 222, a power cutoff switch 223, and a DC-DC converter 224.
  • the switch 226 or the power cutoff switch 223 in the adaptive matching network 225 may be used as needed, or both switches 226 and 223 may be used.
  • the reception antenna 210 of the wireless charger 200 may be implemented with various antennas including a loop antenna, or may include two or more coils having two different frequencies.
  • FIG. 8 is a diagram illustrating a configuration of a receiving antenna of a wireless charger according to another embodiment of the present invention.
  • the wireless charger may include a high frequency coil 212 and a low frequency coil 211 as the receiving antenna 210. Both the high frequency coil 212 and the low frequency coil 211 can receive the power transmitted by the wireless power supply 100 in a self-resonant induction manner, and the high frequency coil 212 and the low frequency coil 211 for wireless power reception. ) Can be used or two can be used simultaneously.
  • the low frequency coil 211 for data communication using the magnetic field with the wireless power supply device 100.
  • the high frequency coil 212 and the low frequency coil 211 are connected with the power management unit (FIG. 2: 220), and the low frequency coil 211 is also connected with the magnetic field communication modem (FIG. 2: 230).
  • the wireless power supply device 100 also includes a high frequency coil and a low frequency coil. It is preferable to have.
  • a multiaxial three-dimensional coil can be used as the transmitting antenna, and accordingly, a high frequency multiaxial three-dimensional coil and a low frequency multiaxial three-dimensional coil can be used for the transmitting antenna.
  • the bandwidth of the magnetic field signals transmitted through the high frequency multiaxial stereoscopic coil and the low frequency multiaxial stereoscopic coil are different from each other, and the magnetic field signals having different bandwidths are transmitted to the wireless charger 200 to be charged in the dual mode (high frequency band and low frequency band). You can also do
  • the low frequency mode is advantageous for charging a wireless charger in a long distance, and the high frequency mode is closer to a charging distance than the low frequency mode, and can be used when charging to increase charging efficiency.
  • the power receiving function can be controlled ON / OFF while maintaining the power of other wireless chargers other than the charging target device, wireless chargers waiting for charging can be used without inconvenience.

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

Abstract

L'invention concerne un système de transmission de puissance sans fil à nœuds multiples utilisant une induction par résonance magnétique qui permet de charger efficacement de multiples dispositifs de chargement sans fil, ainsi qu'un dispositif de chargement sans fil. Au cours d'une première étape, le dispositif de transmission de puissance sans fil reçoit des informations provenant de multiples dispositifs de chargement sans fil et choisit un dispositif cible à charger en fonction de ces informations, tandis qu'une autre étape consiste à activer/désactiver la fonction de réception de puissance des dispositifs de chargement sans fil en utilisant un réseau de mise en correspondance adaptatif qui peut commander ou ajuster la correspondance d'un commutateur installé sur une unité de conversion de puissance dans le dispositif de chargement sans fil. Il est ainsi possible d'effectuer un chargement sélectif en commandant la fonction de réception de puissance en l'activant/désactivant tout en conservant la puissance dans les dispositifs de chargement sans fil différents du dispositif de chargement sans fil cible, les dispositifs de chargement sans fil en attente de chargement pouvant être utilisés sans aucune gêne.
PCT/KR2011/000529 2010-12-30 2011-01-26 Système de transmission de puissance sans fil à nœuds multiples utilisant une induction par résonance magnétique, et dispositif de chargement sans fil WO2012091209A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020100139400A KR101171937B1 (ko) 2010-12-30 2010-12-30 자기공진유도 방식을 이용한 멀티노드 무선 전력 전송 시스템 및 무선 충전기기
KR10-2010-0139400 2010-12-30

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WO2012091209A1 true WO2012091209A1 (fr) 2012-07-05

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014176857A1 (fr) * 2013-04-28 2014-11-06 海尔集团技术研发中心 Circuit d'extrémité réceptrice de système de transmission d'énergie électrique sans fil
US10673275B2 (en) 2016-02-03 2020-06-02 General Electric Company Method and system for protecting a wireless power transfer system
US10700550B2 (en) 2016-02-03 2020-06-30 General Electric Company System and method for protecting a wireless power transfer system
US10897153B2 (en) 2016-08-04 2021-01-19 General Electric Company System and method for charging receiver devices
US20210210988A1 (en) * 2017-04-19 2021-07-08 Warp Solution Inc. Wireless charging delivery module for adapting wireless charging type between transmitter and receiver

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102110824B1 (ko) 2013-07-17 2020-05-14 삼성전자주식회사 무선 전력 전송 시스템에서의 네트워크 통신 방법 및 장치
KR102297354B1 (ko) * 2013-11-14 2021-09-02 지이 하이브리드 테크놀로지스, 엘엘씨 유도 전력 신호 및 공명 전력 신호를 송수신할 수 있는 무선 전력 전송 시스템
KR102257626B1 (ko) * 2020-02-28 2021-06-01 지이 하이브리드 테크놀로지스, 엘엘씨 하이브리드형 무선 전력 수신 장치, 하이브리드형 무선 전력 수신 장치에서의 무선 전력 신호 제어 방법, 및 이와 관련된 자기 공명식 무선 전력 수신 장치
KR102376240B1 (ko) * 2020-08-25 2022-03-21 지이 하이브리드 테크놀로지스, 엘엘씨 유도 전력 신호 및 공명 전력 신호를 송수신할 수 있는 무선 전력 전송 시스템

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KR20100128379A (ko) * 2009-05-28 2010-12-08 한국전자통신연구원 전자 장치, 무선 전력 전송장치 및 그것의 전력 전송 방법

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014176857A1 (fr) * 2013-04-28 2014-11-06 海尔集团技术研发中心 Circuit d'extrémité réceptrice de système de transmission d'énergie électrique sans fil
US10673275B2 (en) 2016-02-03 2020-06-02 General Electric Company Method and system for protecting a wireless power transfer system
US10700550B2 (en) 2016-02-03 2020-06-30 General Electric Company System and method for protecting a wireless power transfer system
US11394239B2 (en) 2016-02-03 2022-07-19 General Electric Company Method and system for protecting a wireless power transfer system
US11949240B2 (en) 2016-02-03 2024-04-02 General Electric Company Method and system for protecting a wireless power transfer system
US11955805B2 (en) 2016-02-03 2024-04-09 General Electric Company System and method for protecting a wireless power transfer system
US10897153B2 (en) 2016-08-04 2021-01-19 General Electric Company System and method for charging receiver devices
US20210210988A1 (en) * 2017-04-19 2021-07-08 Warp Solution Inc. Wireless charging delivery module for adapting wireless charging type between transmitter and receiver

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KR101171937B1 (ko) 2012-08-07
KR20120077447A (ko) 2012-07-10

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