US2194338A - High voltage winding - Google Patents

High voltage winding Download PDF

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Publication number
US2194338A
US2194338A US185529A US18552938A US2194338A US 2194338 A US2194338 A US 2194338A US 185529 A US185529 A US 185529A US 18552938 A US18552938 A US 18552938A US 2194338 A US2194338 A US 2194338A
Authority
US
United States
Prior art keywords
paper
winding
cylinder
high voltage
flange
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
US185529A
Other languages
English (en)
Inventor
Jacob J Vienneau
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Priority to US185529A priority Critical patent/US2194338A/en
Priority to FR848820D priority patent/FR848820A/fr
Priority to GB1764/39A priority patent/GB523981A/en
Application granted granted Critical
Publication of US2194338A publication Critical patent/US2194338A/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
    • H01F41/125—Other insulating structures; Insulating between coil and core, between different winding sections, around the coil
    • 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
    • H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
    • 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
    • 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
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y10T29/49071—Electromagnet, transformer or inductor by winding or coiling

Definitions

  • My invention relates to electrical windings and particularly to the method of forming the coil structure of a high voltage transformer winding.
  • the object of my invention is the provision of an improved method of forming such a coil structure employing crepe paper for supporting and insulating the winding whereby a smaller space factor and greater insulation at points of greatest voltage stress are possible.
  • Fig. 1 represents a press by which sheets of crepe paper may be precompressed
  • Fig. 2 shows a sheet comprising a number of superposed layers of crepe paper after they have been pro-compressed
  • Fig. 3 represents that step in the method which comprises the moistening of portions of the crepe paper cylinder
  • Fig. 4 is an enlarged portion of Fig. 3
  • FIG. 5 shows a modification.
  • the hand press 1 the pressure plates of which preferably are heated for effecting this compression of the sheets of crepe paper represented at 2; however, it will be understood that in actual practice I prefer to employ a power press for obvious reasons.
  • care is to be taken to arrange the sheets with the corrugations thereof all extending in the same direction.
  • the several sheets of crepe paper become united with each other to form a firm laminated sheet whose thickness is only a fractional part of the sum total thickness of the sheets of crepe paper before compression.
  • the sheet of compressed crepe paper illustrated at 3 in Fig. 2 is then bent or rolled up in the form of a cylinder 4 preferably by rolling it on a cylinder of insulation, as shown at 5, the outer end being suitably secured to prevent unrolling.
  • the paper is arranged so that the corrugations extend axially of the cylinder.
  • the next step of the process is to moisten the end portions of the crepe paper cylinder, i. e. 49 those portions which extend beyond the limits of the winding.
  • a convenient way of moistening these end portions is to apply a spray or jet it of water thereto while the complete winding as sembly is rotated.
  • the compressed crepe paper quickly soaks up the water which causes it to swell to approximately its original thickness and make it sufiiciently flexible that it can be readily deformed without breaking the paper.
  • the end portion of the paper cylinder While the end portion of the paper cylinder is in a moistenedcondition, it is flared outwardly to form an end flange. ihis step may be performed by the use of a suitable tool applied to the end of the cylinder which will cause it to flare or what is preferable may be produced by centrifugal force as the result of rotating the entire assembly with sufficient speed.
  • the flared end portion of .the paper cylinder will thus he along the side of the outerring 9 as shown for example at Fig. 4.
  • the moistened portion of the paper may be allowed to dry by the evaporation of the moisture without movement of the assembly but I prefer to hasten it by continuing the rapid rotation of the assembly by which the surplus moisture is thrown on and drying takes place quite rapidly.
  • I have shown an additional end ring II which may be pushed over the inner insulation ring 5.
  • crepe paper insulation is continuous from that portion beneath the winding to that portion forming the flange #2, Also, that part of the insultion namely at the juncture of the cylinrical part and the flanged part is approximately iiii portion I3.
  • the most difilcult part of a structure of this kind to insulate is that part comprising the juncture between the flange and the cylinder.
  • the dielectric strength at the point where insulation is the most necessary is substantially increased over the dielectric strength of the solid insulation directly below the winding, inv other words, between the winding and the yoke, inasmuch as the dielectric strength in a given space is higher, when occupied by oil and laminated paper, than when there is only a single dense barrier in combination with an oil duct in the remaining space.
  • the cylinder of compressed paper In certain cases and in certain forms of winding it is not necessary to have the cylinder of compressed paper extend the-entire length 01. the winding but need extend only for a few turns at the ends of the winding. In certain cases also it is desirable that the expanded part of the compressed paper should not only form a flange .at the end of the winding but also overlie some of the outer turns at the end of the winding.
  • the method of forming a flanged member of crepe paper for supporting and insulating a high voltage winding which comprises initially compressing a sheet of said paper to reduce its thickness, bending the compressed sheet into cylindrical form with the line of the corrugations of the paper extending axially, moistening an end portion of the cylinder thereby restoring the paper substantially to its original thickness and turning the moistened portion outwardly to form a flange.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Insulating Of Coils (AREA)
US185529A 1938-01-18 1938-01-18 High voltage winding Expired - Lifetime US2194338A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US185529A US2194338A (en) 1938-01-18 1938-01-18 High voltage winding
FR848820D FR848820A (fr) 1938-01-18 1939-01-13 Perfectionnements aux bobinages a haute tension
GB1764/39A GB523981A (en) 1938-01-18 1939-01-18 Improvements in and relating to winding insulation for electrical apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US185529A US2194338A (en) 1938-01-18 1938-01-18 High voltage winding

Publications (1)

Publication Number Publication Date
US2194338A true US2194338A (en) 1940-03-19

Family

ID=22681356

Family Applications (1)

Application Number Title Priority Date Filing Date
US185529A Expired - Lifetime US2194338A (en) 1938-01-18 1938-01-18 High voltage winding

Country Status (3)

Country Link
US (1) US2194338A (fr)
FR (1) FR848820A (fr)
GB (1) GB523981A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2478633A (en) * 1946-03-19 1949-08-09 Gen Electric Electric coil
US3034542A (en) * 1956-03-29 1962-05-15 Daystrom Inc Apparatus for constructing wire-wound resistance elements
US20020130749A1 (en) * 2001-03-14 2002-09-19 Hay Noah David Combs for disk wound transformers

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2478633A (en) * 1946-03-19 1949-08-09 Gen Electric Electric coil
US3034542A (en) * 1956-03-29 1962-05-15 Daystrom Inc Apparatus for constructing wire-wound resistance elements
US20020130749A1 (en) * 2001-03-14 2002-09-19 Hay Noah David Combs for disk wound transformers
US6709615B2 (en) * 2001-03-14 2004-03-23 Square D Company Method of manufacturing a comb for winding coils of a disk wound transformer

Also Published As

Publication number Publication date
GB523981A (en) 1940-07-26
FR848820A (fr) 1939-11-07

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