FR2423044A1 - DIRECT CURRENT MAGNETIC FIELD CANCELLATION CIRCUIT - Google Patents

DIRECT CURRENT MAGNETIC FIELD CANCELLATION CIRCUIT

Info

Publication number
FR2423044A1
FR2423044A1 FR7901198A FR7901198A FR2423044A1 FR 2423044 A1 FR2423044 A1 FR 2423044A1 FR 7901198 A FR7901198 A FR 7901198A FR 7901198 A FR7901198 A FR 7901198A FR 2423044 A1 FR2423044 A1 FR 2423044A1
Authority
FR
France
Prior art keywords
magnetic field
direct current
cancellation circuit
current magnetic
transformer
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.)
Pending
Application number
FR7901198A
Other languages
French (fr)
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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
Priority claimed from JP435678A external-priority patent/JPS5498104A/en
Priority claimed from JP5080178U external-priority patent/JPS54153812U/ja
Priority claimed from JP9180678U external-priority patent/JPS559447U/ja
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Publication of FR2423044A1 publication Critical patent/FR2423044A1/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F7/00—Regulating magnetic variables
    • 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
    • H01F27/38—Auxiliary core members; Auxiliary coils or windings
    • 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
    • H01F27/40—Structural association with built-in electric component, e.g. fuse
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/001—Current supply source at the exchanger providing current to substations
    • H04M19/003—Arrangements for compensation of the DC flux in line transformers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Measuring Magnetic Variables (AREA)

Abstract

Circuit d'annulation de champ magnétique à courant continu d'un transformateur suivant lequel un signal d'information provenant d'un terminal de communication est transmis de son enroulement primaire à son enroulement secondaire et qui fournit un courant continu au terminal de communication par l'intermédiaire de l'enroulement primaire. Ce circuit est construit d'un dispositif à effet Hall qui détecte un champ étique produit dans le transformateur, et d'un circuit de rétroaction qui fait rétroagir un composant de courant continu d'une sortie du dispositif à effet Hall vers un troisième enroulement à l'intérieur du transformateur pour annuler le champ magnétique à courant continu produit par le courant continu qui passe dans l'enroulement primaime.DC magnetic field cancellation circuit of a transformer in which an information signal from a communication terminal is transmitted from its primary winding to its secondary winding and which supplies a DC current to the communication terminal through the 'intermediate the primary winding. This circuit is constructed of a Hall effect device which senses an etic field produced in the transformer, and of a feedback circuit which feeds back a DC component from an output of the Hall effect device to a third winding. inside the transformer to cancel the direct current magnetic field produced by the direct current flowing through the primary winding.

FR7901198A 1978-01-20 1979-01-18 DIRECT CURRENT MAGNETIC FIELD CANCELLATION CIRCUIT Pending FR2423044A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP435678A JPS5498104A (en) 1978-01-20 1978-01-20 Cancelling circuit for direct current magnetic field
JP5080178U JPS54153812U (en) 1978-04-19 1978-04-19
JP9180678U JPS559447U (en) 1978-07-05 1978-07-05

Publications (1)

Publication Number Publication Date
FR2423044A1 true FR2423044A1 (en) 1979-11-09

Family

ID=27276233

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7901198A Pending FR2423044A1 (en) 1978-01-20 1979-01-18 DIRECT CURRENT MAGNETIC FIELD CANCELLATION CIRCUIT

Country Status (3)

Country Link
DE (1) DE2901699A1 (en)
FR (1) FR2423044A1 (en)
GB (1) GB2013000A (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7810086A (en) * 1978-10-06 1980-04-09 Philips Nv POWER BRIDGE FOR A SUBSCRIBER FLOW.
US4361732A (en) * 1981-02-09 1982-11-30 Northern Telecom Limited Trunk interface circuit with current compensation
US4450427A (en) * 1981-12-21 1984-05-22 General Electric Company Contactor with flux sensor
DE3533762A1 (en) * 1985-09-21 1987-04-02 Ant Nachrichtentech Circuit arrangement for connecting a subscriber terminal to a subscriber connection line
DE3537187C2 (en) * 1985-10-18 1994-05-05 Siemens Ag Method for preventing the direct current induction saturation of a speech transmitter in telephone systems
JPH0785653B2 (en) * 1986-12-22 1995-09-13 三菱電機株式会社 Three-phase transformer for cycloconverter
WO2008151661A1 (en) * 2007-06-12 2008-12-18 Siemens Transformers Austria Gmbh & Co Kg Electrical transformer with unidirectional flux compensation
RU2453010C2 (en) * 2007-06-12 2012-06-10 Сименс Трансформерз Остриа Гмбх Унд Ко Кг Electric transformer with constant flow compensation
KR101720039B1 (en) * 2010-09-29 2017-03-27 지멘스 악티엔게젤샤프트 Device and method for reducing a magnetic unidirectional flux fraction in the core of a transformer
BR112016020693B8 (en) 2014-03-19 2023-04-25 Siemens Ag METHOD FOR COMPENSATING ONE OR MORE DC COMPONENTS IN AN ELECTRICAL SYSTEM
US11146053B2 (en) 2016-01-29 2021-10-12 Power Hv Inc. Bushing for a transformer

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2301982A1 (en) * 1975-02-20 1976-09-17 Int Standard Electric Corp STATE CHANGE DETECTOR CIRCUIT OF A TELEPHONE LINE
FR2305900A1 (en) * 1975-03-25 1976-10-22 Int Standard Electric Corp DETECTION CIRCUIT FOR STOPPING THE RING TONE INTENDED FOR A TELEPHONE CENTRAL
US4103112A (en) * 1977-10-17 1978-07-25 Northern Telecom Limited Telephone line circuit with differential loop current sensing and compensation

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2301982A1 (en) * 1975-02-20 1976-09-17 Int Standard Electric Corp STATE CHANGE DETECTOR CIRCUIT OF A TELEPHONE LINE
FR2305900A1 (en) * 1975-03-25 1976-10-22 Int Standard Electric Corp DETECTION CIRCUIT FOR STOPPING THE RING TONE INTENDED FOR A TELEPHONE CENTRAL
US4103112A (en) * 1977-10-17 1978-07-25 Northern Telecom Limited Telephone line circuit with differential loop current sensing and compensation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/76 *

Also Published As

Publication number Publication date
GB2013000A (en) 1979-08-01
DE2901699A1 (en) 1979-07-26

Similar Documents

Publication Publication Date Title
FR2423044A1 (en) DIRECT CURRENT MAGNETIC FIELD CANCELLATION CIRCUIT
FR2374768A1 (en) POWER SUPPLY REGULATED BY SWITCHING
FR2422472A1 (en) CONTINUOUS CURRENT WELDING DEVICE
FR2377126A1 (en) CONSTANT SUPPLY CURRENT SUBSCRIBER TELEPHONE LINE CIRCUIT
FR2406352A1 (en) CIRCUIT FOR THE PROTECTION OF A CONTROL DEVICE IN WHICH THREE LOGIC LEVELS OCCUR
FR2391545A1 (en) VARIABLE LEAKAGE TRANSFORMER
FR2453548A1 (en) ELECTRONIC SWITCH
FR3102580B1 (en) Voltage Regulator
FR2639158B1 (en) MAGNETIC DEVICE AND CIRCUIT FOR SUPPRESSING THE OVERLOAD CURRENT USING THE SAME
US4414435A (en) Interface circuit with flux cancelling transformer circuit
FR2403641A1 (en) DEVICE FOR STABILIZING THE FOCUSING OF THE ELECTRON BEAM OF AN ELECTROMAGNETIC FOCUSING TYPE TUBE
GB2005111A (en) A telephone charge pulse receiver circuit
FR2402245A1 (en) VOLTAGE AND CURRENT SOURCES
FR2360205A1 (en) VOLTAGE CONVERTER DEVICE
FR2457041A1 (en) TERMINATOR FOR TELEPHONE INSTALLATIONS
JPS5762625A (en) Integrated circuit device
BE898832A (en) CURRENT DIVIDER
FR2416533A1 (en) PERFECTED TRANSFORMER AND STATIC CONVERTER USING SUCH A TRANSFORMER
CA1173183A (en) Interface circuit with flux cancelling transformer circuit
FR2413700A1 (en) CURRENT COMPARATOR APPLICABLE TO ELECTRONIC EQUIPMENT
DE3666744D1 (en) High-frequency wide band transformer circuit
SU553684A1 (en) Magnetic analog control and storage device
BE613745A (en) Device for controlling an electronic network using an electric field
FR2420246A1 (en)
JPS5329540A (en) Power line carrier communication device