GB1082385A - Improvements in or relating to electromagnetic devices - Google Patents

Improvements in or relating to electromagnetic devices

Info

Publication number
GB1082385A
GB1082385A GB3344864A GB3344864A GB1082385A GB 1082385 A GB1082385 A GB 1082385A GB 3344864 A GB3344864 A GB 3344864A GB 3344864 A GB3344864 A GB 3344864A GB 1082385 A GB1082385 A GB 1082385A
Authority
GB
United Kingdom
Prior art keywords
core
magnetic
wedges
gaps
thermal expansion
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
GB3344864A
Inventor
Neil Winn Sykes
Terence James Hatfull
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.)
Plessey UK Ltd
Original Assignee
Plessey UK 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 Plessey UK Ltd filed Critical Plessey UK Ltd
Priority to GB3344864A priority Critical patent/GB1082385A/en
Publication of GB1082385A publication Critical patent/GB1082385A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/10—Composite arrangements of magnetic circuits
    • H01F3/14—Constrictions; Gaps, e.g. air-gaps
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

1,082,385. Inductances; transformers; electromagnets. PLESSEY-U.K. Ltd. Aug. 17, 1965 [Aug. 17, 1964], No. 33448/64. Headings H1P and H1T. A toroidal magnetic core 1, 2, e.g. of ferrite or dust iron, carrying encapsulated windings 3, 4, is provided with one or more solid non-magnetic gaps having a known coefficient of thermal expansion to compensate for changes in the core permeability with changes in ambient temperature. In the figure, two gaps are shown comprising wedges 9, 10 of non-magnetic material. One of the wedges is of aluminium, brass, or plastics, and has a thermal expansion effective to compensate for temperature changes, whilst the other wedge is of silica or invar and has zero coefficient of thermal expansion. The core may be circumferentially prestressed and the core has resilience, either by being composed of resilient material or by the provision of a tension spring 8 mounted on an insulating terminal plate 6 for the windings. The wedges 9, 10 have screw adjusting means 11, 12 to vary the dimensions of the non-magnetic solid gaps.
GB3344864A 1964-08-17 1964-08-17 Improvements in or relating to electromagnetic devices Expired GB1082385A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3344864A GB1082385A (en) 1964-08-17 1964-08-17 Improvements in or relating to electromagnetic devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3344864A GB1082385A (en) 1964-08-17 1964-08-17 Improvements in or relating to electromagnetic devices

Publications (1)

Publication Number Publication Date
GB1082385A true GB1082385A (en) 1967-09-06

Family

ID=10353087

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3344864A Expired GB1082385A (en) 1964-08-17 1964-08-17 Improvements in or relating to electromagnetic devices

Country Status (1)

Country Link
GB (1) GB1082385A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2232537A (en) * 1989-05-11 1990-12-12 Victor Company Of Japan Flyback transformer for use in television receiver

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2232537A (en) * 1989-05-11 1990-12-12 Victor Company Of Japan Flyback transformer for use in television receiver

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