GB1139660A - Improvements in or relating to electrical transformers - Google Patents

Improvements in or relating to electrical transformers

Info

Publication number
GB1139660A
GB1139660A GB43819/67A GB4381967A GB1139660A GB 1139660 A GB1139660 A GB 1139660A GB 43819/67 A GB43819/67 A GB 43819/67A GB 4381967 A GB4381967 A GB 4381967A GB 1139660 A GB1139660 A GB 1139660A
Authority
GB
United Kingdom
Prior art keywords
coils
magnetic layer
relating
core
wound
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
GB43819/67A
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.)
Toko Inc
Original Assignee
Toko Inc
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 Toko Inc filed Critical Toko Inc
Publication of GB1139660A publication Critical patent/GB1139660A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/0153—Electrical filters; Controlling thereof
    • H03H7/0161—Bandpass filters
    • H03H7/0169—Intermediate frequency filters
    • 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
    • H01F27/36—Electric or magnetic shields or screens
    • H01F27/366—Electric or magnetic shields or screens made of ferromagnetic material
    • 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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/288—Shielding
    • 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
    • H01F27/36—Electric or magnetic shields or screens
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/0153—Electrical filters; Controlling thereof
    • H03H7/0161—Bandpass filters
    • H03H7/0169—Intermediate frequency filters
    • H03H7/0184—Intermediate frequency filters with ferromagnetic core

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

1,139,660. Transformers. TOKO, K.K. 26 Sept., 1967 [7 Oct., 1966], No. 43819/67. Heading H1T. The wire used to wind the coils (2, 2a) (Fig. 2, not shown) of an intermediate-frequency transformer comprises an electrically conductive core 8 and a magnetic layer 9, e.g. pure iron or permalloy, coating the surface of the core 8. An insulating layer 10 may be provided over the magnetic layer. In one embodiment the coils are wound on a former (1) provided around its periphery with radial fins forming therebetween narrow annular grooves (7) in which the coils are spirally wound. Adjusting cores (4) are also provided. The transformer, which includes one or more tuning capacitors (5), is enclosed in a metal casing (3).
GB43819/67A 1966-10-07 1967-09-26 Improvements in or relating to electrical transformers Expired GB1139660A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6566666 1966-10-07

Publications (1)

Publication Number Publication Date
GB1139660A true GB1139660A (en) 1969-01-08

Family

ID=13293530

Family Applications (1)

Application Number Title Priority Date Filing Date
GB43819/67A Expired GB1139660A (en) 1966-10-07 1967-09-26 Improvements in or relating to electrical transformers

Country Status (2)

Country Link
DE (1) DE1591737B1 (en)
GB (1) GB1139660A (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3003129A (en) * 1960-05-23 1961-10-03 Gen Dynamics Corp R.f. transformer design for minimum coupling to shielding cover

Also Published As

Publication number Publication date
DE1591737B1 (en) 1971-01-28

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