US3212172A - Method of forming coils - Google Patents

Method of forming coils Download PDF

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Publication number
US3212172A
US3212172A US160171A US16017161A US3212172A US 3212172 A US3212172 A US 3212172A US 160171 A US160171 A US 160171A US 16017161 A US16017161 A US 16017161A US 3212172 A US3212172 A US 3212172A
Authority
US
United States
Prior art keywords
coil
mold
wire
winding
turns
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
US160171A
Other languages
English (en)
Inventor
Jr Reuel L Davis
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 US160171A priority Critical patent/US3212172A/en
Priority to GB45983/62A priority patent/GB1026497A/en
Priority to CH1481362A priority patent/CH409146A/de
Priority to SE13613/62A priority patent/SE300263B/xx
Application granted granted Critical
Publication of US3212172A publication Critical patent/US3212172A/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
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/02—Casings
    • H01F27/022—Encapsulation
    • 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
    • H01F41/005—Impregnating or encapsulating
    • 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
    • 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

  • This invention relates to coils such as transformer coils and the like, and more particularly to a method of forming such coils and the coils which are formed by such method.
  • the wire to provide the necessary insulation for the voltage gradient between layers, would make the wire extremely expensive, while at the same time increasing the overall size of the coil such that the overall dimension of a coil formed therefrom would be substantially larger than present day coils which are formed from the usual insulated wire and provided with layer insulation between the various layers of the wire.
  • a further object of this invention is to provide a novel economical coil, wherein all turns of the coil are contiguous to all adjacent turns.
  • a still further object of this invention is to provide a new and novel method of making a coil in which the turns of the coil are randomly wound from one end of the coil to the other, in substantially the same manner, as the applied voltage progresses across the coil.
  • a coil in which the various turns of the coils are randomly wound with all turns of such coil being contiguous to all adjacent turns.
  • the coil is made by the method of providing a cavity, such as a mold or the like, in the shape desired for the specific coil, and then randomly spinning or otherwise laying turns of wire into such cavity. After the cavity is filled with wire the wire is compacted, in any desired manner, within the cavity to form atight, randomly wound coil.
  • the formed coil may then be encapsulated with any desired type of insulating material, or taped to provide a solid, randomly wound coil.
  • FIGURE 1 is a perspective view of of a transformer, partly in section, showing one use of the novel coil of this invention
  • FIGURE 2 is a top view of one form of cavity which may be used in making the coil of this invention, showing one method of placing the wire forming the coil into such cavity;
  • FIGURE 3 is a sectional view taken substantially along the line 3-3 of FIG. '2 and showing one method of compacting which may be used in the method of this invention;
  • FIGURE 4 is a schematic representation of one means of encapsulating the formed coil made by the method of this invention.
  • FIGURE 5 is a side view of a finished coil, partly in section, made according to this invention.
  • an instrument transformer for example a potential transformer 10, provided with a primary and secondary coil and a core, in a manner well known to those skilled in the art.
  • the potential transformer is shown as broken away in one side of the casing 12 thereof to show a section of a randomly wound coil 14 which may be made according to the method of this invention.
  • the coil 14 is the primary coil of the potential transformer 10, and is provided with the voltage of the line to be measured through leads which terminate at connecting points 16, 17 shown on top of the transformer 10.
  • each adjacent 'turn is sub stantially subjected only to the voltage gradient of the normal turn-to-turn volt-age gradient, and thenefo-w, the need for layer insulation has been completely eliminated.
  • a cavity 18 is provided, the cavity being formed in any desired shape, a rectangular shape being shown in this instance.
  • a mold 20 which has a base 21 and an upstanding central member 22, by placing a central winding member 24 over the mold center member 22 and a winding can 2 6 within the outer upstanding member 28 of the mold 20.
  • the cavity 18 comprises portions of theinner surface of the base 21 of the mold 20, the outside'surface of the central winding member 24 and the inside surface of the winding can 26.
  • the central winding member 24 and the winding can are examples of the core surface of the base 21 of the mold 20, the outside'surface of the central winding member 24 and the inside surface of the winding can 26.
  • the formed coil Within the mold 20 may then be placed in an encapsulating machine, such as, for example, machine 48 shown in FIG. 4. As will be understood, before the mold is placed into the encapsulating machine 48 the center piece 24 and the winding can 26 are removed.
  • an encapsulating machine such as, for example, machine 48 shown in FIG. 4.
  • the encapsulating mate-rial flows through the tube 56 and into the mold 20 a Sindicated, to surround the formed coil and fill all the voids within the mold 20. After a sufficient amount of encapsulating material has been poured into the mold 20 so as to completely surround the formed coil,
  • the encapsulating material is stopped and heatis then applied, as necessary, to cure the encapsulating material to thereby firmly encase the coil within such encapsulating material.
  • the coil may be removed from the mold and can 26 and the upstandingportion 28 of the mold 20, such that the end of the wire to be used to form the coil may be taken outside of the mold 20, in the'manne r indicated in FIG. 3.
  • the assembled mold, with the center section 24 and the winding can 26 in place thereon, is then placed into a winding machine, such as machine 32, which is provided with a reel of wire 33 mounted in the member 34.
  • the winding wire extends from the member 34 along station-1 ary arm 36, and to a rotary feeding member 38 on the movable arm 40.
  • the winding machine is indicated only in a schematic manner in the drawing since it does notitself form any part of the invention of this application.
  • the wire isfed from thefeeding member 38 on movable arm 40 into the cavity 18 formed in the mold 20.
  • the movable arm 40 is caused to move in a lateral and oscillatory manner about the pivot point 42, so as tolay the wire,44 within the cavity 18.
  • the coil 58 will thereby provide a solid, well insulated coil 58 which is randomly wound from the wire 44.
  • the coil 58 does not have any layer insulation and will easily Withstand the voltage gradients which may be caused within such coil when subjected to impulse voltages in use.
  • FIG. 5
  • the coil member 58 is shown as being provided with.
  • two separate cores 60 and 62 shown in phantom view, which are inserted Within the window opening 64 of the coil, the window opening of course having been formed when the coil was made by the center piece 22 of the mold 20.
  • the lower end of the Wire 44 forming the coil 58 is brought out through the base of the member as shown in the mold in FIG. 3, and forms one terminal 66 of the coil 58 while a second lead 68 from the top end of the coil forms the other terminal of the coil.
  • the coil may be merely provided with a supportscope of the invention is considered only as limited in the manner set forth in the claim appended hereto.
  • a method of making a coil comprising the steps (a) providing a mold of substantially the size and shape of the desired coil,

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Insulating Of Coils (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
US160171A 1961-12-18 1961-12-18 Method of forming coils Expired - Lifetime US3212172A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US160171A US3212172A (en) 1961-12-18 1961-12-18 Method of forming coils
GB45983/62A GB1026497A (en) 1961-12-18 1962-12-05 Method of forming coils and coils formed thereby
CH1481362A CH409146A (de) 1961-12-18 1962-12-17 Verfahren zur Herstellung einer elektrischen Spule
SE13613/62A SE300263B (de) 1961-12-18 1962-12-18

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US160171A US3212172A (en) 1961-12-18 1961-12-18 Method of forming coils

Publications (1)

Publication Number Publication Date
US3212172A true US3212172A (en) 1965-10-19

Family

ID=22575818

Family Applications (1)

Application Number Title Priority Date Filing Date
US160171A Expired - Lifetime US3212172A (en) 1961-12-18 1961-12-18 Method of forming coils

Country Status (4)

Country Link
US (1) US3212172A (de)
CH (1) CH409146A (de)
GB (1) GB1026497A (de)
SE (1) SE300263B (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3419837A (en) * 1964-12-09 1968-12-31 Dresser Ind Pulse transformer
US4914413A (en) * 1989-08-24 1990-04-03 Magnetek, Inc. Transformer with layer-wound and random wound windings
WO1999050859A1 (en) * 1998-03-27 1999-10-07 Alliedsignal Inc. Amorphous metal transformer having a generally rectangular coil
US6583707B2 (en) 2001-04-25 2003-06-24 Honeywell International Inc. Apparatus and method for the manufacture of large transformers having laminated cores, particularly cores of annealed amorphous metal alloys
US6668444B2 (en) 2001-04-25 2003-12-30 Metglas, Inc. Method for manufacturing a wound, multi-cored amorphous metal transformer core
US6765467B2 (en) 2001-04-25 2004-07-20 Dung A. Ngo Core support assembly for large wound transformer cores

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1041293A (en) * 1905-06-08 1912-10-15 Hartmann & Braun Ag Method of manufacturing electrical-instrument coils.
US1603515A (en) * 1924-10-31 1926-10-19 Earle M Chase Inductance coil
US1668302A (en) * 1924-03-05 1928-05-01 Auty Frank Coil
US1956826A (en) * 1932-06-16 1934-05-01 Rola Company Method of making alpha voice coil
US2269678A (en) * 1939-06-02 1942-01-13 Jefferson Electric Co Method of manufacturing coil structures
US2682021A (en) * 1949-12-16 1954-06-22 Gustaf W Elmen Shredded magnetic core and method of making same
US2869316A (en) * 1957-03-12 1959-01-20 Plastic Wire & Cable Corp Twisted conductors and cables and method and apparatus for making the same
US2925570A (en) * 1954-08-12 1960-02-16 Strock Howard Eugene Current transformer
US2988804A (en) * 1957-08-30 1961-06-20 Tibbetts Industries Method of winding electric coils

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1041293A (en) * 1905-06-08 1912-10-15 Hartmann & Braun Ag Method of manufacturing electrical-instrument coils.
US1668302A (en) * 1924-03-05 1928-05-01 Auty Frank Coil
US1603515A (en) * 1924-10-31 1926-10-19 Earle M Chase Inductance coil
US1956826A (en) * 1932-06-16 1934-05-01 Rola Company Method of making alpha voice coil
US2269678A (en) * 1939-06-02 1942-01-13 Jefferson Electric Co Method of manufacturing coil structures
US2682021A (en) * 1949-12-16 1954-06-22 Gustaf W Elmen Shredded magnetic core and method of making same
US2925570A (en) * 1954-08-12 1960-02-16 Strock Howard Eugene Current transformer
US2869316A (en) * 1957-03-12 1959-01-20 Plastic Wire & Cable Corp Twisted conductors and cables and method and apparatus for making the same
US2988804A (en) * 1957-08-30 1961-06-20 Tibbetts Industries Method of winding electric coils

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3419837A (en) * 1964-12-09 1968-12-31 Dresser Ind Pulse transformer
US4914413A (en) * 1989-08-24 1990-04-03 Magnetek, Inc. Transformer with layer-wound and random wound windings
WO1999050859A1 (en) * 1998-03-27 1999-10-07 Alliedsignal Inc. Amorphous metal transformer having a generally rectangular coil
US6411188B1 (en) 1998-03-27 2002-06-25 Honeywell International Inc. Amorphous metal transformer having a generally rectangular coil
US6583707B2 (en) 2001-04-25 2003-06-24 Honeywell International Inc. Apparatus and method for the manufacture of large transformers having laminated cores, particularly cores of annealed amorphous metal alloys
US6668444B2 (en) 2001-04-25 2003-12-30 Metglas, Inc. Method for manufacturing a wound, multi-cored amorphous metal transformer core
US6765467B2 (en) 2001-04-25 2004-07-20 Dung A. Ngo Core support assembly for large wound transformer cores

Also Published As

Publication number Publication date
GB1026497A (en) 1966-04-20
CH409146A (de) 1966-03-15
SE300263B (de) 1968-04-22

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