US3783427A - Layer winding for electrical apparatus - Google Patents

Layer winding for electrical apparatus Download PDF

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Publication number
US3783427A
US3783427A US00201356A US3783427DA US3783427A US 3783427 A US3783427 A US 3783427A US 00201356 A US00201356 A US 00201356A US 3783427D A US3783427D A US 3783427DA US 3783427 A US3783427 A US 3783427A
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US
United States
Prior art keywords
tape
conductor
pitch
layer
winding
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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
US00201356A
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English (en)
Inventor
U Zetterlund
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ABB Norden Holding AB
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ASEA AB
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Filing date
Publication date
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Publication of US3783427A publication Critical patent/US3783427A/en
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    • 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
    • H01F27/323—Insulation between winding turns, between winding layers
    • 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

Definitions

  • the pitch of the tape is decreased so as to build up .abody of insulation layer of greater thickness at the end of the layer.
  • the invention relates to layer windings for electrical apparatus such as transformers, reactors or the like.
  • the present invention relates to a layer winding for electrical apparatus, such as transformers, reactors or the like, the layer insulation being manufactured from tapes of insulating material which are wound on at the same time as the conductor and which are wider than the diameter of the conductor.
  • the invention is characterized in that the pitch of the insulating tape is substantially zero at the ends of the winding, while being greater than the pitch of the conductor along at least a part of the distance between the end of the winding.
  • the invention avoids the disadvantages mentioned in the introduction, that the winding process must be interrupted at the end of each winding layer to complete the insulation and also for application of an edge support for the winding if a bobbin having a permanent edge support is not used. Furthermore, the variable pitch of the insulating tape makes it possible to adapt the thickness of the layer insulation to the tension between two layers so that the layer insulation is thickest where the tension is highest.
  • the edge support can be made of the .same tape as the layer insulation, but it is also possible to use separate tape for this purpose.
  • FIGS. 1 4 show various phases in the application of the invention during manufacture of a layer winding for a transformer, and FIG. shows a modification.
  • FIG. 1 shows a part of the bobbin or coil frame 1 on which the winding is arranged.
  • the insulating layer 2 lying nearest the coil frame is formed by a tape 3 of paper or other suitable material.
  • the wire or conductor forming the winding is designated 4. It is shown here as circular in cross-section but may be shaped differently, having square or rectangular cross-section, and is varnished or wrapped around with paper in a known manner to insulate the turns of the winding from each other.
  • the tape is wound with constant pitch, greater than the pitch of the conductor.
  • the paper tape has been previously coated with transverse strips 5 of dried adhesive which cures during a subsequent drying process.
  • the adhesive is to attach the tapes to each other and attach the wire to the layer insulation.
  • FIG. 2 shows the appearance of the winding at a later stage.
  • the tape 3 has reached the end of the coil frame. Exactly at the moment when the righthand edge of the tape reaches the righthand edge of the coil frame, the pitch of the tape is reduced to zero. Consequently the tape is wound for a certain time on the same area, thus producing an edge support 6, the righthand edge of which is coplanar with the end surface of the coil frame.
  • FIG. 3 shows the appearance of the winding at the moment when a complete layer of the wire has been wound on to form a winding layer.
  • the righthand turn of wire abuts against the lefthand edge of the edge support.
  • the pitch of the tape in comparison with that of the wire, and the thickness of the tape are so chosen that the thickness of the tape are so chosen that the height of the edge support is substantially equal to twice the radial extension of the winding wire. If the wire has a circular cross-section, with a diameter d,.as in the present case, then the radial height of the support 6 will be 2d.
  • the pitch of the tape is constant. According to ers of insulation will be alternately thickest and thinnest at the ends of the winding.
  • the edge support 6 can be formed in two ways. In the first, the tape is so far ahead of the wire that the tape also forms the edge support, as previously mentioned. in the other, the tape runs parallel to the wire or the pitch of the tape is de- 1 creased so much that the wire has time to catch up with the tape just at the end of the layer. The edge support is then formed by another, thinner tape wound on to the end of the winding with zero pitch a number of turns before the tape 3 and wire 4 reach this end.
  • the thickness t of the layer insulation can be varied by one or more of the three parameters in the righthand side of the equation.
  • the method according. to the invention thus has the considerable advantage that the winding operation need not be interrupted after each turn to complete the layer insulation.
  • the winding operation can proceed continuously since the tape runs in front of the wire producing the layer insulation and the required edge support.
  • the edge support may be omitted since the winding will in any case be sufficiently stable at the ends.
  • Each of the spaces 2 in FIG. 1 represents a plurality of turns of the tape.
  • a coil for electrical apparatus such as transformers, the coil comprising a coil frame and a plurality of layers of a conductor and an insulating tape wound on the frame with the conductor and tape progressing across the frame in successive layers of opposite directions, the tape being wider than the conductor, in which the pitch of the tape is greater than the pitch of the conductor within at least a part of each layer and the pitch of the tape at the beginning of the winding of a layer has a value which decreases gradually along the winding towards the opposite end of the winding layer.
  • a coil according to claim 1 in which the pitch of the tape is zero where the tape has reached the end of the frame after a complete layer, said tape forming an insulating layer between two adjacent conductor layers as long as the pitch of the tape is greater than zero, said' tape forming an edge support at the end of the coil frame when the pitch of the tape is zero, the radial height of such a support being about twice the diameter of the conductor.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Insulating Of Coils (AREA)
US00201356A 1970-11-23 1971-11-23 Layer winding for electrical apparatus Expired - Lifetime US3783427A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE15807/70A SE347837B (da) 1970-11-23 1970-11-23

Publications (1)

Publication Number Publication Date
US3783427A true US3783427A (en) 1974-01-01

Family

ID=20301262

Family Applications (1)

Application Number Title Priority Date Filing Date
US00201356A Expired - Lifetime US3783427A (en) 1970-11-23 1971-11-23 Layer winding for electrical apparatus

Country Status (13)

Country Link
US (1) US3783427A (da)
AU (1) AU456316B2 (da)
BE (1) BE773569A (da)
BR (1) BR7107761D0 (da)
CA (1) CA957032A (da)
DK (1) DK132725C (da)
FI (1) FI55422C (da)
FR (1) FR2115155B1 (da)
GB (1) GB1321166A (da)
IT (1) IT942898B (da)
NO (1) NO130085B (da)
SE (1) SE347837B (da)
ZA (1) ZA717789B (da)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4653178A (en) * 1984-08-04 1987-03-31 Mwb Messwandler-Bau Ag Method for the manufacture of a layer winding

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2460531A1 (fr) * 1979-06-29 1981-01-23 Bourchanin Henri Bobine d'inductance a capacite parasite minimale

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US761039A (en) * 1903-09-30 1904-05-24 Westinghouse Electric & Mfg Co Insulation for transformer-coils.
US1036935A (en) * 1912-01-19 1912-08-27 Acme Wire Co Electrical coil and method of making the same.
US1223947A (en) * 1915-10-07 1917-04-24 Harry E Page Induction-coil.
US2213093A (en) * 1937-03-25 1940-08-27 Gen Electric Meter potential coil

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US761039A (en) * 1903-09-30 1904-05-24 Westinghouse Electric & Mfg Co Insulation for transformer-coils.
US1036935A (en) * 1912-01-19 1912-08-27 Acme Wire Co Electrical coil and method of making the same.
US1223947A (en) * 1915-10-07 1917-04-24 Harry E Page Induction-coil.
US2213093A (en) * 1937-03-25 1940-08-27 Gen Electric Meter potential coil

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4653178A (en) * 1984-08-04 1987-03-31 Mwb Messwandler-Bau Ag Method for the manufacture of a layer winding
US4733213A (en) * 1984-08-04 1988-03-22 Mwb Messwandler-Bau Aktiengesellschaft Layer winding for electrical equipment

Also Published As

Publication number Publication date
DK132725B (da) 1976-01-26
FI55422C (fi) 1979-07-10
DK132725C (da) 1976-06-28
AU3588071A (en) 1973-05-24
ZA717789B (en) 1972-08-30
BE773569A (fr) 1972-01-31
CA957032A (en) 1974-10-29
SE347837B (da) 1972-08-14
GB1321166A (en) 1973-06-20
FR2115155A1 (da) 1972-07-07
IT942898B (it) 1973-04-02
AU456316B2 (en) 1974-12-12
BR7107761D0 (pt) 1973-04-05
FI55422B (fi) 1979-03-30
FR2115155B1 (da) 1977-01-28
NO130085B (da) 1974-07-01

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