WO2018074805A3 - Inductance mapping method and devices for wireless charging - Google Patents

Inductance mapping method and devices for wireless charging Download PDF

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Publication number
WO2018074805A3
WO2018074805A3 PCT/KR2017/011441 KR2017011441W WO2018074805A3 WO 2018074805 A3 WO2018074805 A3 WO 2018074805A3 KR 2017011441 W KR2017011441 W KR 2017011441W WO 2018074805 A3 WO2018074805 A3 WO 2018074805A3
Authority
WO
WIPO (PCT)
Prior art keywords
inductance
wireless power
inductance value
value
present
Prior art date
Application number
PCT/KR2017/011441
Other languages
French (fr)
Korean (ko)
Other versions
WO2018074805A2 (en
Inventor
임성현
Original Assignee
엘지이노텍(주)
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.)
Filing date
Publication date
Application filed by 엘지이노텍(주) filed Critical 엘지이노텍(주)
Publication of WO2018074805A2 publication Critical patent/WO2018074805A2/en
Publication of WO2018074805A3 publication Critical patent/WO2018074805A3/en

Links

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
    • H02J50/10—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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
    • G01R27/2611—Measuring inductance
    • 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
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/38—Impedance-matching networks

Abstract

The present invention relates to an inductance matching method for wireless charging, and devices therefor. The inductance matching method in a wireless power transmitter for transmitting wireless power, according to one embodiment of the present invention, may comprise the steps of: detecting an object disposed in a charging region; when the object is detected, measuring a quality factor value; on the basis of the measured quality factor value, estimating an inductance value of a wireless power receiver; determining whether inductance adjustment is necessary by comparing an inductance value of the wireless power transmitter with the inductance value of the wireless power receiver; and according to the results of determining, adjusting the inductance value of the wireless power transmitter. Thus, the present invention has a merit whereby charging efficiency may be maximized by dynamically adjusting an inductance value of oneself according to an inductance value of another object.
PCT/KR2017/011441 2016-10-18 2017-10-17 Inductance mapping method and devices for wireless charging WO2018074805A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2016-0134876 2016-10-18
KR1020160134876A KR102018268B1 (en) 2016-10-18 2016-10-18 Inductance Mapping Method and Apparatus for Wireless Charging

Publications (2)

Publication Number Publication Date
WO2018074805A2 WO2018074805A2 (en) 2018-04-26
WO2018074805A3 true WO2018074805A3 (en) 2018-07-12

Family

ID=62019200

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2017/011441 WO2018074805A2 (en) 2016-10-18 2017-10-17 Inductance mapping method and devices for wireless charging

Country Status (2)

Country Link
KR (1) KR102018268B1 (en)
WO (1) WO2018074805A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102572975B1 (en) * 2018-05-23 2023-08-31 엘지이노텍 주식회사 Wireless power transmission method and apparatus
CN114123436B (en) * 2022-01-25 2023-04-07 合肥有感科技有限责任公司 Inductance deviation self-adaptive wireless charging method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100045114A1 (en) * 2008-08-20 2010-02-25 Sample Alanson P Adaptive wireless power transfer apparatus and method thereof
KR20110137747A (en) * 2010-06-17 2011-12-23 가부시키가이샤 한도오따이 에네루기 켄큐쇼 Electric power transmitting device, electric power receiving device, and power supply method using electric power transmitting and receiving devices
KR20120019090A (en) * 2010-08-25 2012-03-06 삼성전자주식회사 Method and apparatus of tracking of resonance impedance in resonance power transfer system
KR20130087708A (en) * 2012-01-30 2013-08-07 전자부품연구원 Wireless power transfering apparatus enable impedence to match
US20150280444A1 (en) * 2012-05-21 2015-10-01 University Of Washington Through Its Center For Commercialization Wireless power delivery in dynamic environments

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8278784B2 (en) * 2008-07-28 2012-10-02 Qualcomm Incorporated Wireless power transmission for electronic devices
KR101811292B1 (en) * 2011-07-06 2017-12-26 엘지전자 주식회사 Wireless power transmitter and wireless power receiver having fuction of resonance frequency control
KR101438884B1 (en) * 2012-05-07 2014-09-05 엘지이노텍 주식회사 Apparatus for transmitting wireless power method for transmitting wireless power thereof
US9819228B2 (en) * 2013-03-01 2017-11-14 Qualcomm Incorporated Active and adaptive field cancellation for wireless power systems
KR101490732B1 (en) * 2013-04-23 2015-02-09 엘지이노텍 주식회사 Apparatus for transmmiting wireless power and apparatus for receiving wireless power and method for transmitting wireless power, method for receiving wireless power, method for transmitting information and method for receiving information

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100045114A1 (en) * 2008-08-20 2010-02-25 Sample Alanson P Adaptive wireless power transfer apparatus and method thereof
KR20110137747A (en) * 2010-06-17 2011-12-23 가부시키가이샤 한도오따이 에네루기 켄큐쇼 Electric power transmitting device, electric power receiving device, and power supply method using electric power transmitting and receiving devices
KR20120019090A (en) * 2010-08-25 2012-03-06 삼성전자주식회사 Method and apparatus of tracking of resonance impedance in resonance power transfer system
KR20130087708A (en) * 2012-01-30 2013-08-07 전자부품연구원 Wireless power transfering apparatus enable impedence to match
US20150280444A1 (en) * 2012-05-21 2015-10-01 University Of Washington Through Its Center For Commercialization Wireless power delivery in dynamic environments

Also Published As

Publication number Publication date
KR20180042576A (en) 2018-04-26
WO2018074805A2 (en) 2018-04-26
KR102018268B1 (en) 2019-11-14

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