WO2012091210A1 - Dispositif d'alimentation électrique sans fil utilisant l'induction à résonance magnétique pour détecter une substance étrangère - Google Patents

Dispositif d'alimentation électrique sans fil utilisant l'induction à résonance magnétique pour détecter une substance étrangère Download PDF

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Publication number
WO2012091210A1
WO2012091210A1 PCT/KR2011/000530 KR2011000530W WO2012091210A1 WO 2012091210 A1 WO2012091210 A1 WO 2012091210A1 KR 2011000530 W KR2011000530 W KR 2011000530W WO 2012091210 A1 WO2012091210 A1 WO 2012091210A1
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WO
WIPO (PCT)
Prior art keywords
wireless power
matching network
signal
detected
output unit
Prior art date
Application number
PCT/KR2011/000530
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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 WO2012091210A1 publication Critical patent/WO2012091210A1/fr

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Classifications

    • 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
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B23/00—Testing or monitoring of control systems or parts thereof
    • G05B23/02—Electric testing or monitoring
    • G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
    • G05B23/0259—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the response to fault detection
    • G05B23/0267—Fault communication, e.g. human machine interface [HMI]
    • G05B23/027—Alarm generation, e.g. communication protocol; Forms of alarm
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B23/00—Testing or monitoring of control systems or parts thereof
    • G05B23/02—Electric testing or monitoring
    • G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
    • G05B23/0259—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the response to fault detection
    • G05B23/0267—Fault communication, e.g. human machine interface [HMI]
    • G05B23/0272—Presentation of monitored results, e.g. selection of status reports to be displayed; Filtering information to the user
    • 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
    • H02J50/60—Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings
    • 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
    • H04B5/26—Inductive coupling using coils
    • 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
    • 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
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

Definitions

  • the present invention relates to a wireless power transmission system, and more particularly, to a wireless power supply apparatus using a magnetic resonance induction method that can detect foreign substances.
  • 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 an object thereof is to provide an apparatus and a method capable of detecting a foreign substance that causes a decrease in power transmission efficiency in a magnetic resonance induction-type wireless power transmission system.
  • the present invention provides at least one of a current sensor, a voltage sensor, and a phase sensor in the power converter of the wireless power supply device to compare the reference current, voltage, and phase with the measured current, voltage, and phase. Detect foreign objects and notify the user of the result.
  • a wireless power transmitter is a wireless power transmitter for transmitting power in a self-resonance induction scheme to an external wireless charger, comprising: an oscillator for generating a signal of a predetermined constant frequency, and generated by the oscillator A power amplifier for amplifying the signal, a matching network for frequency matching to transmit the signal amplified by the power amplifier in a magnetic resonance induction scheme, and a transmission antenna for transmitting the frequency matched signal by the matching network to the wireless charger. And a current sensor connected between the matching network and the transmitting antenna, and an output unit for outputting that a foreign matter is detected when a difference between the current sensed through the current sensor and a predetermined reference current exceeds a predetermined first threshold. It is made to include.
  • the output unit may include one or more of a display screen for outputting the screen that the foreign matter is detected, a voice output unit for outputting a voice that the foreign matter is detected, and a warning light to warn that the foreign matter is detected.
  • the wireless power transmitter stops power transmission when the power transmission efficiency from the wireless power transmitter to the charger is less than a second threshold as a result of the determination based on the difference between the current sensed by the current sensor and the reference current. It may further include a magnetic field communication modem connected to the transmitting antenna.
  • a wireless power transmission apparatus includes an oscillator for generating a signal of a predetermined constant frequency, a power amplifier for amplifying a signal generated by the oscillator, and a signal amplified by the power amplifier.
  • a matching network for frequency matching to transmit in an inductive manner, a transmitting antenna for transmitting a frequency matched signal by the matching network to the wireless charger, a voltage sensor connected between the matching network and the transmitting antenna, and It includes an output unit for outputting that the foreign matter is detected when the difference between the voltage detected by the voltage sensor and the predetermined reference voltage exceeds a predetermined threshold.
  • a wireless power transmitter is a wireless power transmitter for transmitting power in a self-resonance induction scheme to an external wireless charger, the oscillator for generating a signal of a predetermined constant frequency, by the oscillator
  • a power amplifier for amplifying the generated signal
  • a matching network for frequency matching in order to transmit the signal amplified by the power amplifier in a magnetic resonance induction method, and for transmitting the frequency matched signal by the matching network to the wireless charger.
  • a phase sensor for detecting a phase difference between a transmitting antenna, a signal before passing through the matching network and a signal after passing through the matching network in parallel with the matching network, and a foreign object when the phase difference exceeds a predetermined threshold It includes an output unit for outputting the.
  • the magnetic resonance induction method when the wireless power transmitter detects the presence of foreign matters around the wireless power transmitter, the magnetic resonance induction method can be notified to the user so as to remove the power transmission efficiency and prevent energy waste. have.
  • the system can be protected by interrupting and notifying the power supply.
  • 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 power supply apparatus according to an embodiment of the present invention.
  • FIG 3 is a view showing a state in which foreign matter around the wireless power supply apparatus according to an embodiment of the present invention.
  • 4 to 7 are block diagrams illustrating configurations of a power converter of a wireless power supply apparatus according to various embodiments of the present disclosure.
  • FIG. 8 is a block diagram illustrating a configuration of an output unit of a wireless power supply apparatus according to an 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).
  • 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 is transmitted to the wireless chargers 200_1, 200_2, .., 200_N in a self-resonance induction manner based on the charging information.
  • the wireless power supply device 100 may be implemented as a fixed type or a mobile type.
  • the wireless power supply device 100 may be installed in a furniture such as a ceiling or a table indoors.
  • the wireless power supply device 100 may be installed inside a moving object such as a vehicle, a train, a subway.
  • the wireless power supply 100 is implemented as a mobile, the wireless power supply 100 itself may be implemented as a separate mobile device, or may be implemented as part of another digital device such as a cover of a notebook computer. .
  • 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.
  • FIG. 2 is a block diagram showing in more detail the overall configuration of a wireless power supply apparatus according to an embodiment of the present invention.
  • the wireless power supply device 100 receives power from an external power supply source to adjust a resonant frequency band between the wireless power supply device 100 and the wireless charger 200.
  • AC power from the power converter 120, the magnetic field communication modem 130 and the power converter 120 to perform a magnetic field communication with the wireless charger 200 using a magnetic field communication protocol to convert to AC power having a Wireless power supply including a transmission antenna 110, a power converter 120, and a magnetic field communication modem 130 for transmitting data from the magnetic field communication modem 130 to the wireless charger 200 using a magnetic resonance induction method.
  • It includes a control unit 140 for controlling the components of the device 100 and an output unit 150 for outputting the foreign matter detection situation.
  • the magnetic resonance induction method used in the multi-node wireless energy transmission system is a method of maximizing energy wireless transmission efficiency by resonance between a transmitting antenna and a 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. Therefore, matching of the resonant frequency between the wireless power supply device 100 and the wireless charger 200 is an important problem.
  • the transmission efficiency is sharply reduced because there is no match.
  • the foreign matter is more likely to be located around the transmitting antenna of the wireless power supply device, and when there is a metallic foreign material such as a key, Frequency matching does not match.
  • an embodiment of the present invention provides an apparatus and method for detecting a foreign substance present around a wireless power supply.
  • 4 to 6 are block diagrams illustrating configurations of a power converter of a wireless power supply apparatus according to various embodiments of the present disclosure.
  • the power converter 120 of the wireless power supply device 100 includes an oscillator 121, a power amplifier 122, a matching network 123, and a current sensor 124.
  • the oscillator 121 generates a signal of a predetermined frequency, which is amplified by the power amplifier 122 and then frequency matched through the matching network 123 and transmitted through the transmitting antenna 110.
  • a current sensor 124 is connected between the matching network 123 and the transmitting antenna 110 to measure the current transmitted from the matching network 123 to the transmitting antenna 110. At this time, if foreign matter exists around the transmission antenna 110, the current flowing from the matching network 123 to the transmission antenna 110 is changed. The current sensor 124 detects such a change in current.
  • the wireless power supply device 100 determines that the foreign matter exists. can do. Therefore, the presence of the foreign matter can be warned to the user through the output unit (FIG. 2: 150).
  • the output unit (FIG. 2: 150) may display the presence of a foreign substance on the screen, or may warn the user using various methods such as guiding a voice or turning on a warning light.
  • the wireless power supply device 100 may stop the power transmission.
  • the power transmission may be interrupted along with the presence of the foreign matter through the output unit (FIG. 2: 150).
  • FIG. 5 shows a configuration of a power converter according to another embodiment of the present invention.
  • a voltage sensor is used instead of a current sensor to detect the presence of foreign substances.
  • the power converter 120 of the wireless power supply device 100 includes an oscillator 121, a power amplifier 122, a matching network 123, and a voltage sensor 125.
  • the voltage sensor 125 measures the voltage between the matching network 123 and the transmit antenna 110.
  • the wireless power supply device 100 may determine that the foreign matter exists and notify the user.
  • the alerting scheme, interruption of power transmission, and the like are similar to those in the above-described embodiment with reference to FIG. 4.
  • FIG. 6 illustrates a configuration of a power converter according to still another embodiment of the present invention.
  • a phase sensor is used to detect the presence of foreign substances.
  • the power converter 120 includes an oscillator 121, a power amplifier 122, a matching network 123, and a phase sensor 126.
  • the phase sensor 126 is connected in parallel with the matching network 123 to detect the phase difference of the signal before and after passing through the matching network 123.
  • the wireless power supply device 100 may determine that there is a foreign matter, and thus warn the user of the presence of the foreign matter through the output unit (FIG. 2: 150).
  • the alerting scheme, interruption of power transmission, and the like are similar to those in the above-described embodiment with reference to FIG. 4.
  • Two or more sensors can be used together for more accurate detection of foreign objects. That is, by using a current sensor and a phase sensor together or using a voltage sensor and a phase sensor together to obtain two types of information, it is possible to more accurately detect the presence of foreign substances.
  • 7 shows a configuration of an embodiment using a current sensor and a phase sensor together.
  • FIG. 8 is a block diagram illustrating a configuration of an output unit of a wireless power supply apparatus according to an embodiment of the present invention.
  • the output unit 150 includes a display screen 151, an audio output unit 152, and a warning light 153.
  • the output unit 150 may be used to display charging information, etc. in addition to displaying detection of foreign matter.
  • the output unit 150 includes the display screen 151, the audio output unit 152, and the warning light 153.
  • the output unit 150 includes the display screen 151 and the audio output unit. It may be configured to include only at least one of the 152 and the warning light (153).
  • the charging efficiency when the foreign matter is located around the wireless power transmission apparatus and the charging efficiency is lowered, it can be detected and notified to the user to remove the foreign matter so that the normal charging can be made. In addition, when the charging efficiency falls below a certain limit, the charging is stopped to prevent unnecessary power consumption.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Signal Processing (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

La présente invention concerne un dispositif et un procédé servant à détecter une substance étrangère, laquelle est la cause d'une réduction de la transmission de puissance et du rendement de réception dans un système de transmission de puissance sans fil de type induction à résonance magnétique, au moins un élément sélectionné parmi un capteur de courant, un capteur de tension, et un capteur de phase étant installé dans une unité de conversion de puissance pour un dispositif d'alimentation électrique sans fil, de manière à détecter la substance étrangère en comparant un courant, une tension, ou une phase normal(e) à un courant, une tension, ou une phase mesuré(e), et à notifier le résultat à un utilisateur. Par conséquent, la substance étrangère peut être éliminée et une charge normale est permise, ce qui accroît le rendement de transmission de puissance et prévient le gaspillage d'énergie. De plus, la charge est interrompue quand le rendement de charge passe sous une limite prédéfinie, ce qui prévient le gaspillage inutile de puissance et protège le système.
PCT/KR2011/000530 2010-12-30 2011-01-26 Dispositif d'alimentation électrique sans fil utilisant l'induction à résonance magnétique pour détecter une substance étrangère WO2012091210A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2010-0139401 2010-12-30
KR1020100139401A KR101183664B1 (ko) 2010-12-30 2010-12-30 이물질을 감지할 수 있는 자기공진유도 방식을 이용한 무선 전력공급 장치

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WO2017000428A1 (fr) * 2015-06-30 2017-01-05 京东方科技集团股份有限公司 Circuit de recharge sans fil résonnant magnétique
WO2017217663A1 (fr) * 2016-06-13 2017-12-21 엘지이노텍(주) Procédé de détection de corps étrangers, et appareil et système correspondants
CN114024374A (zh) * 2021-11-23 2022-02-08 桔充充(杭州)新能源有限公司 二轮电动车无线充电系统及异物检测和功率调节方法

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WO2015134871A1 (fr) 2014-03-06 2015-09-11 Thoratec Corporation Connecteurs électriques pour dispositifs implantables
US10186760B2 (en) 2014-09-22 2019-01-22 Tc1 Llc Antenna designs for communication between a wirelessly powered implant to an external device outside the body
WO2016057525A1 (fr) 2014-10-06 2016-04-14 Thoratec Corporation Connecteur multiaxial pour dispositifs implantables
US10148126B2 (en) 2015-08-31 2018-12-04 Tc1 Llc Wireless energy transfer system and wearables
EP3902100A1 (fr) 2015-10-07 2021-10-27 Tc1 Llc Systèmes de transfert d'énergie par résonance à optimisation du rendement basée sur l'impédance du récepteur
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KR20170140734A (ko) * 2016-06-13 2017-12-21 엘지이노텍 주식회사 이물질 검출 방법 및 그를 위한 장치 및 시스템
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