US3575775A - Windable insulating tape with spacers and method of manufacturing such tape - Google Patents

Windable insulating tape with spacers and method of manufacturing such tape Download PDF

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Publication number
US3575775A
US3575775A US847014A US3575775DA US3575775A US 3575775 A US3575775 A US 3575775A US 847014 A US847014 A US 847014A US 3575775D A US3575775D A US 3575775DA US 3575775 A US3575775 A US 3575775A
Authority
US
United States
Prior art keywords
tape
spacers
adhesive
insulating tape
manufacturing
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 - Lifetime
Application number
US847014A
Other languages
English (en)
Inventor
Lars Andersson
Stig Larbo
Sture Lindskog
Otto Johansson
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.)
ABB Norden Holding AB
Original Assignee
ASEA AB
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 ASEA AB filed Critical ASEA AB
Application granted granted Critical
Publication of US3575775A publication Critical patent/US3575775A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/12—Insulating of windings
    • H01F41/122—Insulating between turns or between winding layers
    • 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
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/322—Insulating of coils, windings, or parts thereof the insulation forming channels for circulation of the fluid
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/18—Longitudinally sectional layer of three or more sections
    • Y10T428/183—Next to unitary sheet of equal or greater extent
    • Y10T428/187—Continuous sectional layer

Definitions

  • An insulating tape with spacers for forming axial channels in windings of coils for transformers is formed by applying at spaced intervals along a side of a continuous base insulating tape coated with an adhesive rolls of an insulating tape likewise coated on one side with an adhesive and applying heat and pressure. Each roll has a projecting portion also adhesively secured to the main tape.
  • the present invention relates to a method of manufacturing a windable tape with spacers arranged at a certain distance from each other in order to form axial cooling channels in windings for transformers and similar electrical apparatus in which a tape of insulating material pretreated with adhesive is provided with said spacers.
  • the method is characterised in that the spacers are produced from a second tape of insulating material pretreated with adhesive by rolling up a certain length of the second tape to a spiral which is applied on the base tape and attached to it by means of heating and pressure.
  • the tapes consist of insulating material, suitably paper and are pretreated on one side with an adhesive which is solid at room temperature and only adheres after heating.
  • One tape 1 the base tape, is provided with adhesive on the upper side and forms the carrier in the finished product.
  • a spacer 2 is formed by rolling up a certain length of the second tape 3 into a spiral with the adhesive side of the tape facing inward and this spiral is placed on the base tape.
  • the base tape 1 and the spiral are heated, for example by blowing hot air over them, and the spiral is simultaneously pressed against the base tape.
  • a piece 4 of the second tape 3 is left outside the spiral and this piece, which has its adhesive surface facing the adhesive surface of the base tape, is pressed against the base tape and heated.
  • the part of the second tape 3 which is thus adhered to the base tape is approximately the same length as the finished spacer, thus doubling the total contact surface between the two tapes.
  • the method according to the invention provides a tape with the best possible properties. Since the carrier tape is unbroken, the] disadvantage is completely eliminated which exists with the known tapes that the rolled double spiral becomes unrolled if the tape is stretched and the adhesive surfaces open. The large contact surface between the spacer and the base tape ensures that the spacer is securely attached to the base tape.
  • Method of manufacturing a windable tape with spacers arranged at a distance from each other in order to form axial cooling channels in windings for transformers and similar electrical apparatus which comprises applying on a continuous base tape of insulating material pretreated with adhesive spacers produced from a second tape of insulating material pretreated with adhesive by rolling up a length of the second tape into a spiral and attaching the rolled up length to the base tape by heat and pressure.
  • Method according to claim 1 in which comprises leaving a piece of the length of the second tape which is rolled into a spiral free outside the spiral and adhering this piece to the base tape.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Insulating Of Coils (AREA)
  • Insulating Bodies (AREA)
US847014A 1968-08-30 1969-08-04 Windable insulating tape with spacers and method of manufacturing such tape Expired - Lifetime US3575775A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE11646/68A SE323137B (de) 1968-08-30 1968-08-30

Publications (1)

Publication Number Publication Date
US3575775A true US3575775A (en) 1971-04-20

Family

ID=20294348

Family Applications (1)

Application Number Title Priority Date Filing Date
US847014A Expired - Lifetime US3575775A (en) 1968-08-30 1969-08-04 Windable insulating tape with spacers and method of manufacturing such tape

Country Status (5)

Country Link
US (1) US3575775A (de)
DE (1) DE1938987B2 (de)
GB (1) GB1224128A (de)
NO (1) NO123495B (de)
SE (1) SE323137B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2623934A1 (fr) * 1987-11-24 1989-06-02 Inst Transformatorostroenia Barreau pour appareils a induction

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017208814A1 (de) 2017-05-24 2018-11-29 Isotek Gmbh Distanzband, Transformatorenwicklung und Transformator sowie das Verfahren zur Herstellung eines Distanzbandes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2623934A1 (fr) * 1987-11-24 1989-06-02 Inst Transformatorostroenia Barreau pour appareils a induction

Also Published As

Publication number Publication date
NO123495B (de) 1971-11-29
DE1938987A1 (de) 1970-09-03
SE323137B (de) 1970-04-27
DE1938987B2 (de) 1972-01-20
GB1224128A (en) 1971-03-03

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