GB2013000A - D.C. magnetic field cancellation circuit - Google Patents
D.C. magnetic field cancellation circuitInfo
- Publication number
- GB2013000A GB2013000A GB7901310A GB7901310A GB2013000A GB 2013000 A GB2013000 A GB 2013000A GB 7901310 A GB7901310 A GB 7901310A GB 7901310 A GB7901310 A GB 7901310A GB 2013000 A GB2013000 A GB 2013000A
- Authority
- GB
- United Kingdom
- Prior art keywords
- magnetic field
- cancellation circuit
- field cancellation
- transformer
- effect device
- 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.)
- Withdrawn
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
Abstract
A D.C. magnetic field cancellation circuit in a transformer 21, having primary windings 21a, 21b and a secondary winding 21c, includes a Hall effect device 10 which detects the magnetic field generated in the transformer 21, a D.C. component of an output of the Hall effect device 10 being fedback to a third transformer winding 21e in order to cancel the D.C. magnetic field generated by the direct current flowing through the primary windings 21a, 21b. <IMAGE>
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 |
---|---|
GB2013000A true GB2013000A (en) | 1979-08-01 |
Family
ID=27276233
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB7901310A Withdrawn GB2013000A (en) | 1978-01-20 | 1979-01-12 | D.C. magnetic field cancellation circuit |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE2901699A1 (en) |
FR (1) | FR2423044A1 (en) |
GB (1) | GB2013000A (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2940025A1 (en) * | 1978-10-06 | 1980-04-10 | Philips Nv | BRIDGE FOR A PARTICIPANT CIRCUIT |
EP0058470A1 (en) * | 1981-02-09 | 1982-08-25 | Northern Telecom Limited | Trunk interface circuit with current compensation |
US4450427A (en) * | 1981-12-21 | 1984-05-22 | General Electric Company | Contactor with flux sensor |
EP0275483A1 (en) * | 1986-12-22 | 1988-07-27 | Mitsubishi Denki Kabushiki Kaisha | 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 |
WO2012041368A1 (en) * | 2010-09-29 | 2012-04-05 | Siemens Transformers Austria Gmbh & Co Kg | Device and method for reducing a magnetic unidirectional flux fraction in the core of a transformer |
RU2453010C2 (en) * | 2007-06-12 | 2012-06-10 | Сименс Трансформерз Остриа Гмбх Унд Ко Кг | Electric transformer with constant flow compensation |
WO2015139743A1 (en) * | 2014-03-19 | 2015-09-24 | Siemens Aktiengesellschaft | Dc compensation for high dc current in transformer |
US11146053B2 (en) | 2016-01-29 | 2021-10-12 | Power Hv Inc. | Bushing for a transformer |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1478219A (en) * | 1975-02-20 | 1977-06-29 | Standard Telephones Cables Ltd | Telecommunication exchange circuits |
GB1479094A (en) * | 1975-03-25 | 1977-07-06 | Standard Telephones Cables Ltd | Ring trip detectors |
US4103112A (en) * | 1977-10-17 | 1978-07-25 | Northern Telecom Limited | Telephone line circuit with differential loop current sensing and compensation |
-
1979
- 1979-01-12 GB GB7901310A patent/GB2013000A/en not_active Withdrawn
- 1979-01-17 DE DE19792901699 patent/DE2901699A1/en not_active Ceased
- 1979-01-18 FR FR7901198A patent/FR2423044A1/en active Pending
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2940025A1 (en) * | 1978-10-06 | 1980-04-10 | Philips Nv | BRIDGE FOR A PARTICIPANT CIRCUIT |
EP0058470A1 (en) * | 1981-02-09 | 1982-08-25 | Northern Telecom Limited | Trunk interface circuit with current compensation |
US4450427A (en) * | 1981-12-21 | 1984-05-22 | General Electric Company | Contactor with flux sensor |
EP0275483A1 (en) * | 1986-12-22 | 1988-07-27 | Mitsubishi Denki Kabushiki Kaisha | Three-phase transformer for cycloconverter |
RU2453010C2 (en) * | 2007-06-12 | 2012-06-10 | Сименс Трансформерз Остриа Гмбх Унд Ко Кг | Electric transformer with constant flow compensation |
WO2008151661A1 (en) * | 2007-06-12 | 2008-12-18 | Siemens Transformers Austria Gmbh & Co Kg | Electrical transformer with unidirectional flux compensation |
US8314674B2 (en) | 2007-06-12 | 2012-11-20 | Siemens Ag Österreich | Electrical transformer with unidirectional flux compensation |
WO2012041368A1 (en) * | 2010-09-29 | 2012-04-05 | Siemens Transformers Austria Gmbh & Co Kg | Device and method for reducing a magnetic unidirectional flux fraction in the core of a transformer |
KR20130099982A (en) * | 2010-09-29 | 2013-09-06 | 지멘스 악티엔게젤샤프트 외스터라이히 | Device and method for reducing a magnetic unidirectional flux fraction in the core of a transformer |
US9046901B2 (en) | 2010-09-29 | 2015-06-02 | Siemens Aktiengesellschaft | Device and method for reducing a magnetic unidirectional flux fraction in the core of a transformer |
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 |
WO2015139743A1 (en) * | 2014-03-19 | 2015-09-24 | Siemens Aktiengesellschaft | Dc compensation for high dc current in transformer |
CN106104721A (en) * | 2014-03-19 | 2016-11-09 | 西门子公司 | The DC of the big DC electric current in transformator is compensated |
US10032556B2 (en) | 2014-03-19 | 2018-07-24 | Siemens Aktiengesellschaft | DC compensation for high DC current in transformer |
US11146053B2 (en) | 2016-01-29 | 2021-10-12 | Power Hv Inc. | Bushing for a transformer |
Also Published As
Publication number | Publication date |
---|---|
DE2901699A1 (en) | 1979-07-26 |
FR2423044A1 (en) | 1979-11-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |