GB658355A - Improvements in and relating to magnetic cores - Google Patents

Improvements in and relating to magnetic cores

Info

Publication number
GB658355A
GB658355A GB11210/49A GB1121049A GB658355A GB 658355 A GB658355 A GB 658355A GB 11210/49 A GB11210/49 A GB 11210/49A GB 1121049 A GB1121049 A GB 1121049A GB 658355 A GB658355 A GB 658355A
Authority
GB
United Kingdom
Prior art keywords
winding
permeability
sections
providing
maximum permeability
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
GB11210/49A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co 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
Application filed by British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB658355A publication Critical patent/GB658355A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00Variable transformers or inductances not covered by group H01F21/00
    • H01F29/14Variable transformers or inductances not covered by group H01F21/00 with variable magnetic bias
    • H01F29/146Constructional details
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00Variable transformers or inductances not covered by group H01F21/00
    • H01F29/14Variable transformers or inductances not covered by group H01F21/00 with variable magnetic bias

Abstract

658,355. Transformers and inductances. BRITISH THOMSON-HOUSTON CO., Ltd. April 27, 1949, No. 11210. Convention date, May 6, 1948. [Class 38 (ii)] To obtain a magnetic core operating with a constant permeability the ferromagnetic core is made in two sections 2, 3 each having a closed magnetic circuit and providing parallel magnetic paths, with a common exciting winding 7 linking both sections and means, such as a D.C. winding 4, for magnetizing one section with a unidirectional flux, of density in the vicinity of that providing maximum permeability, such that the algebraic sum of the flux densities in the respective sections, which would be operating above and below the density providing maximum permeability, gives a constant B/H slope and hence permeability with variation of the exciting current in winding 7. When the winding 7 is excited with A.C. a further common biassing winding 8 may link both sections and be energized with D.C. of value to give a magnetizing force to each section of value half that required for maximum permeability, the magnitude of the alternating current, between positive and negative maximum values, being not more than that corresponding to the magnetizing force necessary to give maximum permeability, and hence avoid reversal of magnetization. A suitable material is 50/50 iron-cobalt alloy with the winding 4 providing a M.M.F. of two oersteds.
GB11210/49A 1948-05-06 1949-04-27 Improvements in and relating to magnetic cores Expired GB658355A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US25349A US2498475A (en) 1948-05-06 1948-05-06 Saturable magnetic core

Publications (1)

Publication Number Publication Date
GB658355A true GB658355A (en) 1951-10-10

Family

ID=21825488

Family Applications (1)

Application Number Title Priority Date Filing Date
GB11210/49A Expired GB658355A (en) 1948-05-06 1949-04-27 Improvements in and relating to magnetic cores

Country Status (2)

Country Link
US (1) US2498475A (en)
GB (1) GB658355A (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL84367C (en) * 1950-07-31
US3022429A (en) * 1957-06-25 1962-02-20 Gen Electric Magnetic control apparatus
US3108241A (en) * 1960-12-13 1963-10-22 Asea Ab Reactor for direct current with alternating current superimposed on the direct current
US3467864A (en) * 1965-09-28 1969-09-16 Susquehanna Corp Method and apparatus for measuring pulse magnitude and charge
US4520335A (en) * 1983-04-06 1985-05-28 Westinghouse Electric Corp. Transformer with ferromagnetic circuits of unequal saturation inductions
US5083101A (en) * 1990-01-03 1992-01-21 Integrated Power Components Integrated electromagnetic interference filter
US5029265A (en) * 1990-01-11 1991-07-02 Staats Gustav W Motor controller having a control loop for neutralizing rotor leakage and magnetizing reactances
US5789907A (en) * 1991-03-29 1998-08-04 Top Gulf Coast Corporation Variable impedence transformer
AU4374993A (en) * 1992-07-10 1994-01-31 Doty Scientific, Inc. Solenoidal, octopolar, transverse gradient coils
US5554929A (en) * 1993-03-12 1996-09-10 Doty Scientific, Inc. Crescent gradient coils
US5530355A (en) * 1993-05-13 1996-06-25 Doty Scientific, Inc. Solenoidal, octopolar, transverse gradient coils
JP4959170B2 (en) * 2005-07-08 2012-06-20 株式会社日立産機システム Iron core for stationary equipment
CN106856140B (en) * 2015-12-09 2020-08-04 乐金电子研发中心(上海)有限公司 Common mode and differential mode integrated inductor with double magnetic cores in three-dimensional staggered arrangement

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1357197A (en) * 1919-11-01 1920-10-26 Herbert B Brooks Electric transformer
US1835209A (en) * 1930-06-23 1931-12-08 Union Switch & Signal Co Electrical translating apparatus

Also Published As

Publication number Publication date
US2498475A (en) 1950-02-21

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