GB1368990A - Circuit arrangements for measuring of q of coils - Google Patents

Circuit arrangements for measuring of q of coils

Info

Publication number
GB1368990A
GB1368990A GB5542971A GB5542971A GB1368990A GB 1368990 A GB1368990 A GB 1368990A GB 5542971 A GB5542971 A GB 5542971A GB 5542971 A GB5542971 A GB 5542971A GB 1368990 A GB1368990 A GB 1368990A
Authority
GB
United Kingdom
Prior art keywords
voltage
measuring
coil
chain
tuned circuit
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB5542971A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of GB1368990A publication Critical patent/GB1368990A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • G01R27/2688—Measuring quality factor or dielectric loss, e.g. loss angle, or power factor

Abstract

1368990 Measuring Q of coils LICENTIA PATENT-VERWALTUNGS GmbH 30 Nov 1971 [4 Dec 1970] 55429/71 Heading G1U The Q-factor of a coil Pr is determined by connecting the coil to form part of a tuned circuit Pr, C which determines the frequency of oscillation of an oscillatory loop, and measuring the voltage uc developed across the capacitor of the tuned circuit. The ozcillatory loop comprises a chain of amplifiers TV, RV, HV, EV and a phase shifter Ph, the chain receiving as input the capacitor voltage uc and providing as output the tuned circuit exciting voltage uo which is maintained constant by an auxiliary loop V1, GL1, DV controlling a controllable amplifier RV in the chain. A voltage uM, proportional to the capacitor voltage uc, and the exciting voltage uo are fed alternately by synchronous switches EU1, EU2, through an amplifier V2, to respective rectifiers/stores GL2, 3, SP1, 2 for comparison by a digital voltmeter DVM. By varying the capacitance C, the Q of the coil may be measured at different frequencies, the frequency being indicated on a meter FM.
GB5542971A 1970-12-04 1971-11-30 Circuit arrangements for measuring of q of coils Expired GB1368990A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702059630 DE2059630A1 (en) 1970-12-04 1970-12-04 Circuit arrangement for measuring the quality of coils

Publications (1)

Publication Number Publication Date
GB1368990A true GB1368990A (en) 1974-10-02

Family

ID=5789934

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5542971A Expired GB1368990A (en) 1970-12-04 1971-11-30 Circuit arrangements for measuring of q of coils

Country Status (2)

Country Link
DE (1) DE2059630A1 (en)
GB (1) GB1368990A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2552030A3 (en) * 2011-07-25 2015-11-25 Sony Corporation Detection apparatus, electric power receiving apparatus, electric power transmission apparatus, wireless electric power transmission system, and detection method
WO2021057849A1 (en) * 2019-09-24 2021-04-01 无锡华润矽科微电子有限公司 Inductor quality factor measurement method, corresponding measurement circuit and application thereof

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2253296C2 (en) * 1972-10-31 1974-09-26 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Test generator

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2552030A3 (en) * 2011-07-25 2015-11-25 Sony Corporation Detection apparatus, electric power receiving apparatus, electric power transmission apparatus, wireless electric power transmission system, and detection method
JP2016027788A (en) * 2011-07-25 2016-02-18 ソニー株式会社 Detection device, power reception device, transmission device, non-contact power transmission system, and detection method
US9467205B2 (en) 2011-07-25 2016-10-11 Sony Corporation Detection apparatus, electric power receiving apparatus, electric power transmission apparatus, wireless electric power transmission system, and detection method
US9660699B2 (en) 2011-07-25 2017-05-23 Sony Corporation Detection apparatus, electric power receiving apparatus, electric power transmission apparatus, wireless electric power transmission system, and detection method
WO2021057849A1 (en) * 2019-09-24 2021-04-01 无锡华润矽科微电子有限公司 Inductor quality factor measurement method, corresponding measurement circuit and application thereof

Also Published As

Publication number Publication date
DE2059630A1 (en) 1972-06-08

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee