DK200301752A - Detektorkredslöb - Google Patents

Detektorkredslöb Download PDF

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Publication number
DK200301752A
DK200301752A DK200301752A DKPA200301752A DK200301752A DK 200301752 A DK200301752 A DK 200301752A DK 200301752 A DK200301752 A DK 200301752A DK PA200301752 A DKPA200301752 A DK PA200301752A DK 200301752 A DK200301752 A DK 200301752A
Authority
DK
Denmark
Prior art keywords
detector circuit
current
ring core
core transformers
compensating
Prior art date
Application number
DK200301752A
Other languages
English (en)
Inventor
Joergensen Hans-Erik
Original Assignee
Danfysik As
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 Danfysik As filed Critical Danfysik As
Priority to DK200301752A priority Critical patent/DK176607B1/da
Priority to PCT/DK2004/000820 priority patent/WO2005052605A1/en
Priority to CNB200480034014XA priority patent/CN100437124C/zh
Priority to US10/579,967 priority patent/US7388363B2/en
Priority to AT04797481T priority patent/ATE357667T1/de
Priority to DE602004005491T priority patent/DE602004005491T2/de
Priority to EP04797481A priority patent/EP1687645B1/en
Publication of DK200301752A publication Critical patent/DK200301752A/da
Application granted granted Critical
Publication of DK176607B1 publication Critical patent/DK176607B1/da

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
    • G01R15/183—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers using transformers with a magnetic core
    • G01R15/185—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers using transformers with a magnetic core with compensation or feedback windings or interacting coils, e.g. 0-flux sensors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • 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
    • H01F38/20—Instruments transformers
    • H01F38/22—Instruments transformers for single phase AC
    • H01F38/28—Current transformers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Transformers For Measuring Instruments (AREA)

Description

PATENTKRAV
Figure DK200301752AD00031
1. Detektorkredsløb til brug ved strømmåling under anvendelse af i det væsentlige ens beviklede ringkemetransformere, hvori der af en hovedstrøm (I5) induceres magnetomotoriske kræfter, der modvirkes af en af en kompensationsstrøm (i4) inducerede magnetomotoriske kræfter, og hvor to af ringkemetransformeme (2, 3) magnetiseres i modfase ved hjælp af en modulationsstrøm, hvilket kredsløb evt. omfatter en synkron ensretter til tilvejebringelse af et reguleringssignal for kompensationsstrømmen, kendetegnet ved, at der er indrettet midler til at kompensere for evt. forskelle imellem de to ringkemetransformere (2,3). 2. Detektorkredsløb ifølge krav 1, kendetegnet ved, at midlerne til at kompensere for evt. forskelle imellem ringkemetransformeme (2, 3) udgøres af en fælles vikling (L6) over de to ringkemer (2, 3), hvilken fælles vikling (L6) aftaster et evt. fejlsignal, der anvendes i negativ tilbagekoblingssløjfe, der af sig selv søger mod ligevægt. 3. Detektorkredsløb ifølge krav 2, kendetegnet ved, at den negative tilbagekoblingssløjfe tilvejebringes ved, at fejlsignalet adderes til modulationssignalet på en sådan måde, at fejlsignalet reduceres og af sig selv søger mod nul. 4. Detektorkredsløb ifølge et eller flere af de foregående krav, kendetegnet ved, at modulationssignalet tilføres udefra. 5. Detektorkredsløb ifølge et af kravene 1-3, kendetegnet ved, at det er selvsvingende, idet modulationssignalet tilvejebringes ved hjælp af en indbygget multivibrator. 6. Detektor ifølge krav 5, kendetegnet ved, at multivibratoren omfatter en Schmitt-trigger (A4). 7. Detektorkredsløb ifølge et af de foregående krav, kendetegnet ved, at der til kompensation for at de kerner (2, 3), der får tilført modulationssignaler, kan gå i mætning er tilføjet en yderligere kerne (4), der ikke går i mætning, som følge af at den ikke får tilført noget modulationssignal.
DK200301752A 2003-11-27 2003-11-27 Detektorkredslöb til brug ved strömmåling DK176607B1 (da)

Priority Applications (7)

Application Number Priority Date Filing Date Title
DK200301752A DK176607B1 (da) 2003-11-27 2003-11-27 Detektorkredslöb til brug ved strömmåling
PCT/DK2004/000820 WO2005052605A1 (en) 2003-11-27 2004-11-26 A detector circuit to be used for measuring current
CNB200480034014XA CN100437124C (zh) 2003-11-27 2004-11-26 用于测量电流的检测器电路
US10/579,967 US7388363B2 (en) 2003-11-27 2004-11-26 Detector circuit to be used for measuring current
AT04797481T ATE357667T1 (de) 2003-11-27 2004-11-26 Detektorschaltung zur verwendung bei einer strommessung
DE602004005491T DE602004005491T2 (de) 2003-11-27 2004-11-26 Detektorschaltung zur verwendung bei einer strommessung
EP04797481A EP1687645B1 (en) 2003-11-27 2004-11-26 A detector circuit to be used for measuring current

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK200301752A DK176607B1 (da) 2003-11-27 2003-11-27 Detektorkredslöb til brug ved strömmåling
DK200301752 2003-11-27

Publications (2)

Publication Number Publication Date
DK200301752A true DK200301752A (da) 2005-05-28
DK176607B1 DK176607B1 (da) 2008-11-10

Family

ID=34626324

Family Applications (1)

Application Number Title Priority Date Filing Date
DK200301752A DK176607B1 (da) 2003-11-27 2003-11-27 Detektorkredslöb til brug ved strömmåling

Country Status (7)

Country Link
US (1) US7388363B2 (da)
EP (1) EP1687645B1 (da)
CN (1) CN100437124C (da)
AT (1) ATE357667T1 (da)
DE (1) DE602004005491T2 (da)
DK (1) DK176607B1 (da)
WO (1) WO2005052605A1 (da)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1807707B1 (en) 2004-11-05 2010-09-22 Liaisons Electroniques-Mècaniques LEM S.A. Detector circuit for measuring current
DE102005045537B3 (de) * 2005-09-23 2006-12-28 Deutsches Elektronen-Synchrotron Desy Einrichtung zur Bestimmung der Stärke des Magnetfeldes eines Elektromagneten
JP2011017618A (ja) * 2009-07-09 2011-01-27 Tamura Seisakusho Co Ltd 電流センサ
DE102011110648A1 (de) 2011-08-18 2013-02-21 Universität Stuttgart Strommessgerät
WO2013023643A1 (de) 2011-08-18 2013-02-21 Universität Stuttgart Strommessgerät
US8829901B2 (en) * 2011-11-04 2014-09-09 Honeywell International Inc. Method of using a magnetoresistive sensor in second harmonic detection mode for sensing weak magnetic fields
KR101329240B1 (ko) * 2012-10-31 2013-11-20 이상철 플럭스 게이트 방식의 비접촉 전류 계측기
CN103424596A (zh) * 2013-05-11 2013-12-04 国家电网公司 无源交流微电流采集放大装置
CN105807117B (zh) * 2014-12-29 2020-01-31 苏州普源精电科技有限公司 用于电流测量探头的电流感测电路及其电流测量探头
US9618541B1 (en) * 2016-04-20 2017-04-11 Neilsen-Kuljian, Inc. Apparatus, method and device for sensing DC currents
CN108362925B (zh) * 2018-02-22 2020-03-17 西安交通大学 双“8”字形三导线磁场对消的零磁通大电流检测系统及方法
CN113866477B (zh) * 2021-08-30 2022-07-05 中国人民解放军海军工程大学 四磁芯六线圈磁调制高精度超大孔径电流检测方法及系统

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4536706A (en) 1982-07-16 1985-08-20 At&T Bell Laboratories Magnetic current sensor
NL8602145A (nl) * 1986-08-22 1988-03-16 Holec Syst & Componenten Meetschakeling voor continue, nauwkeurige meting van gelijk- en wisselstroom.
NL8702471A (nl) * 1987-10-15 1989-05-01 Holec Syst & Componenten Schakeling voor het detecteren van een asymmetrie in de magnetiseringsstroom van een magnetische modulator.
US4952853A (en) * 1988-08-24 1990-08-28 General Electric Company Method and apparatus for sensing direct current of one polarity in a conductor and electronically commutated motor control responsive to sensed motor current
CN2088257U (zh) * 1991-01-07 1991-11-06 鞍山钢铁公司 有补偿装置的交流电压源式电流检测装置
CH684216A5 (fr) * 1991-02-15 1994-07-29 Lem Liaisons Electron Mec Dispositif de mesure de courants.
JP2003315374A (ja) * 2002-04-18 2003-11-06 Mitsubishi Electric Corp 直流漏電検出装置

Also Published As

Publication number Publication date
DE602004005491T2 (de) 2007-11-29
EP1687645A1 (en) 2006-08-09
US7388363B2 (en) 2008-06-17
DK176607B1 (da) 2008-11-10
US20070145968A1 (en) 2007-06-28
CN100437124C (zh) 2008-11-26
DE602004005491D1 (de) 2007-05-03
EP1687645B1 (en) 2007-03-21
CN1882842A (zh) 2006-12-20
WO2005052605A1 (en) 2005-06-09
ATE357667T1 (de) 2007-04-15

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