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US1938421A - Spacer for electrical winding coils - Google Patents

Spacer for electrical winding coils Download PDF

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Publication number
US1938421A
US1938421A US600659A US60065932A US1938421A US 1938421 A US1938421 A US 1938421A US 600659 A US600659 A US 600659A US 60065932 A US60065932 A US 60065932A US 1938421 A US1938421 A US 1938421A
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US
United States
Prior art keywords
spacer
coils
strips
channel
electrical winding
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
US600659A
Inventor
Phillip A Gilbert
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 US600659A priority Critical patent/US1938421A/en
Application granted granted Critical
Publication of US1938421A publication Critical patent/US1938421A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/28Coils; Windings; Conductive connections
    • H01F27/30Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • H01F27/306Fastening or mounting coils or windings on core, casing or other support

Definitions

  • My invention relates to spacers for electrical winding coils such as are often used in transformers and reactors.
  • a winding for electrical apparatus of this character is often inthe form 15j of a stack of annular or disk coils which are separated by radial spacing strips to provide spaces or ducts between the coils for the circulation of a cooling and insulating fluid such as air or specially prepared oil.
  • the general objectr of the present invention is to provide an improved coil spacer for disk coils.
  • FIG. 1 shows*y a transformer with disk coils separated by spacers constructed Vand arranged in accordance with the invention
  • Fig. 2 is a sectional view 'on the line ⁇ 2-2 of Fig. 1
  • Figs. 3, 4 and 5 are explanatory perspective detail views of different forms of spacers constructed in accordance with the invention.
  • the transformer shown in Figs. 1 and 2 includes a magnetic core 10 with windings 11 and 12 formed of stacks of disk coils 13. These coils 13 are arranged in pairs, the two coils of each pair being separated from each other by an an- ?:30' nular sheet 14 of insulating material.V Adjacent pairs of coils 13 are separated by radial spacers 15 which are spaced apart to provide ducts 16 through which a cooling and insulating uid may flow to absorb and'carry away heat from .3'5' vthe coils 13.
  • the magnetic core 10 has two winding legs 17 which are surrounded by insulating ⁇ cylinders 18.
  • the two coil stacks formedby the coils 13 surround the cylinders 18, the inner edges ofthe coils 13 being spaced from the cylinders 18 by spacing strips 19 extending parallel to the axis of the cylinders and interlocked With the inner ends of the radial spacers 15 to hold these radial spacers in place.
  • An insulating and cooling uid in which the transformer may be immersed may thus ow between the inner edges of the coils 13 and the cylinder 18, as well as through the ducts 16 between those'coils which kare spaced apart by the radial spacers 15.
  • Each of the spacing strips 19 includes a channel 20 formed of fibrous insulating material such as pressboard, the longitudinal edges 21 of the channel being bent outwardly parallel to the plane of the base of the channel.
  • radial spacers 15 are formed of flat strips 22 of insulating material, any desired number of these strips being superposed if a single strip is not thick enough for the required spacing between the coils 13.
  • the inner ends of the radial strips 22 are bifurcated to receive the spacing strips 19, the two spaced sides 23 of these bifurcated ends tting against the sides of the channel 20 to prevent them from spreading.
  • Notches 24 are provided at the bases of the inner edges of the sides 23 to engage the outwardly turned edges 21 of the strips 19 and thus lock the radial spacers 15 to the spacing strips 19.
  • the spacing strips 19 also include llers 25 in the channels 20 to hold the sides of the channels apart with their outwardly turned edges 21 securely engaged in the notches 24 of the radial spacer strips 22.
  • the fillers 25 are shown in Figs. 3 and 4 as narrow strips of insulating material extending between the sides of the channel 20.
  • the ller 25 is shown as a channel 75 with its base across the open side of the channel 20.
  • Other forms of ,ller may, yof course, be used if desired.
  • Thechannel 20 may be formed of a single thickness of insulating material, as shown in Figs. 3 and 5, or of more than one so thickness, as shown in Fig. 4. .
  • the radial strips 22 are easily assembled on the strips 19 by slipping the inner bifurcated ends of the strips 22 onto the strips 19v from one end with the outwardly turned edges 21 of the channelsv 20 in 85 the notches 24 of the strips 22.
  • the invention provides a rsimple and securely interlocked coil spacer construction and one which is inexpensive because it may be formed entirely by inexpensive sheet material such as common pressboard.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)

Description

Dec. 5, 1933. P A. GILBERT 1,938,421
SPACER FOR ELECTRICAL WINDING COILS Filed March 25. 1932 Inventor: Phillip Acilbert,
H i s Attorney.
Patented ec. 5, 1933 ,il 'UNITED ,STATES SPACER ron ELECTRICAL WINDING colLs Phillip A. Gilbert, Dalton, Mass., assignor o General Electric Company, a corporation of New York Application March 23, 1932. Serial No.r 600,659
2 Claims.
My invention relates to spacers for electrical winding coils such as are often used in transformers and reactors. A winding for electrical apparatus of this character is often inthe form 15j of a stack of annular or disk coils which are separated by radial spacing strips to provide spaces or ducts between the coils for the circulation of a cooling and insulating fluid such as air or specially prepared oil. The general objectr of the present invention is to provide an improved coil spacer for disk coils.
Further objects and advantages of the invention will appear from the following description taken in connection with the accompanying drawing in which Fig. 1 shows*y a transformer with disk coils separated by spacers constructed Vand arranged in accordance with the invention; Fig. 2 is a sectional view 'on the line` 2-2 of Fig. 1; and Figs. 3, 4 and 5 are explanatory perspective detail views of different forms of spacers constructed in accordance with the invention.
Like reference characters" indicate similar parts in the different gures of the drawing.
Sb" The transformer shown in Figs. 1 and 2 includes a magnetic core 10 with windings 11 and 12 formed of stacks of disk coils 13. These coils 13 are arranged in pairs, the two coils of each pair being separated from each other by an an- ?:30' nular sheet 14 of insulating material.V Adjacent pairs of coils 13 are separated by radial spacers 15 which are spaced apart to provide ducts 16 through which a cooling and insulating uid may flow to absorb and'carry away heat from .3'5' vthe coils 13.
The magnetic core 10 has two winding legs 17 which are surrounded by insulating` cylinders 18. The two coil stacks formedby the coils 13 surround the cylinders 18, the inner edges ofthe coils 13 being spaced from the cylinders 18 by spacing strips 19 extending parallel to the axis of the cylinders and interlocked With the inner ends of the radial spacers 15 to hold these radial spacers in place. An insulating and cooling uid in which the transformer may be immersed may thus ow between the inner edges of the coils 13 and the cylinder 18, as well as through the ducts 16 between those'coils which kare spaced apart by the radial spacers 15. I Y
Each of the spacing strips 19 includes a channel 20 formed of fibrous insulating material such as pressboard, the longitudinal edges 21 of the channel being bent outwardly parallel to the plane of the base of the channel. The
radial spacers 15 are formed of flat strips 22 of insulating material, any desired number of these strips being superposed if a single strip is not thick enough for the required spacing between the coils 13. The inner ends of the radial strips 22 are bifurcated to receive the spacing strips 19, the two spaced sides 23 of these bifurcated ends tting against the sides of the channel 20 to prevent them from spreading. Notches 24 are provided at the bases of the inner edges of the sides 23 to engage the outwardly turned edges 21 of the strips 19 and thus lock the radial spacers 15 to the spacing strips 19. The spacing strips 19 also include llers 25 in the channels 20 to hold the sides of the channels apart with their outwardly turned edges 21 securely engaged in the notches 24 of the radial spacer strips 22. The fillers 25 are shown in Figs. 3 and 4 as narrow strips of insulating material extending between the sides of the channel 20. In Fig. 5, the ller 25 is shown as a channel 75 with its base across the open side of the channel 20. Other forms of ,ller may, yof course, be used if desired. Thechannel 20 may be formed of a single thickness of insulating material, as shown in Figs. 3 and 5, or of more than one so thickness, as shown in Fig. 4. .The radial strips 22 are easily assembled on the strips 19 by slipping the inner bifurcated ends of the strips 22 onto the strips 19v from one end with the outwardly turned edges 21 of the channelsv 20 in 85 the notches 24 of the strips 22.
The invention provides a rsimple and securely interlocked coil spacer construction and one which is inexpensive because it may be formed entirely by inexpensive sheet material such as common pressboard.
The invention has been explained by describing and illustrating several forms thereof, but it will be obvious that changes may be made without departing from the spirit of the in,- vention and the scope of the appended claims.
What I claim as new and desire to secure by Letters Patent of the United States is: Y
1.,The combination with a spacer to extend radially between spaced disk coils of ran electrical winding, said spacer having ka bifurcated end, of a channel formed of iibroussheet matey rial and extending through the bifurcated end of said spacer, the two sides of the bifurcated end. of said spacer fitting against the sides of said channel and having notches in their inner edges, and the longitudinal edges of said fibrous channel being bent outwardly into said notches.
2. 'I'he combination with a spacer to extend radially between spaced disk coils of an elec- 2 1,938,421 n edges, and the longitudinal edges of said fibrous trical Winding, said spacer having a bifurcated end, 0I" a channel formed of fibrous sheet material and extending through the bifurcated end of said spacer, the two sides of the bifurcated end of said spacer tting against the sides of said channel and having notches in their inner sides apart.
PHILLIP A. GILBERT.
US600659A 1932-03-23 1932-03-23 Spacer for electrical winding coils Expired - Lifetime US1938421A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US600659A US1938421A (en) 1932-03-23 1932-03-23 Spacer for electrical winding coils

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US600659A US1938421A (en) 1932-03-23 1932-03-23 Spacer for electrical winding coils

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US1938421A true US1938421A (en) 1933-12-05

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2571418A (en) * 1949-03-17 1951-10-16 American Transformer Co Transformer coil spacer
US2622135A (en) * 1949-05-16 1952-12-16 Allis Chalmers Mfg Co Two-part axial spacer for transformer windings
US2714709A (en) * 1951-03-29 1955-08-02 Ite Circuit Breaker Ltd Transformer cooling means
US2745073A (en) * 1954-12-06 1956-05-08 Allis Chalmers Mfg Co Means for spacing disk coils
US2786187A (en) * 1950-04-06 1957-03-19 Chrysler Corp Electrical coil
US2817065A (en) * 1947-07-23 1957-12-17 Mcgraw Electric Co Electrical transformer windings
DE2813011A1 (en) * 1977-03-26 1978-09-28 Hitachi Ltd FIXED ELECTRIC INDUCTION DEVICE
DE2845195A1 (en) * 1978-10-17 1980-04-30 Transformatoren Union Ag HV winding for transformers and inductors - consists of flat coils fastened to inner insulating cylinder made of segments with ribs
EP0056580A1 (en) * 1981-01-16 1982-07-28 Smit Transformatoren B.V. Winding for an air-cooled dry transformer or reactor having spacers in the air channels
US20140361862A1 (en) * 2013-06-11 2014-12-11 Abb Technology Ag Radial drop winding for open-wound medium voltage dry type transformers with improved support structure
US11049645B2 (en) * 2017-03-24 2021-06-29 Abb Power Grids Switzerland Ag Transformer with air guiding plates
US20230162915A1 (en) * 2020-04-20 2023-05-25 Hitachi Energy Switzerland Ag Component and method for manufacturing insulating spacers

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2817065A (en) * 1947-07-23 1957-12-17 Mcgraw Electric Co Electrical transformer windings
US2571418A (en) * 1949-03-17 1951-10-16 American Transformer Co Transformer coil spacer
US2622135A (en) * 1949-05-16 1952-12-16 Allis Chalmers Mfg Co Two-part axial spacer for transformer windings
US2786187A (en) * 1950-04-06 1957-03-19 Chrysler Corp Electrical coil
US2714709A (en) * 1951-03-29 1955-08-02 Ite Circuit Breaker Ltd Transformer cooling means
US2745073A (en) * 1954-12-06 1956-05-08 Allis Chalmers Mfg Co Means for spacing disk coils
DE2813011A1 (en) * 1977-03-26 1978-09-28 Hitachi Ltd FIXED ELECTRIC INDUCTION DEVICE
DE2845195A1 (en) * 1978-10-17 1980-04-30 Transformatoren Union Ag HV winding for transformers and inductors - consists of flat coils fastened to inner insulating cylinder made of segments with ribs
EP0056580A1 (en) * 1981-01-16 1982-07-28 Smit Transformatoren B.V. Winding for an air-cooled dry transformer or reactor having spacers in the air channels
DE3101217A1 (en) * 1981-01-16 1982-08-05 Smit Transformatoren B.V., 6500 Nijmegen WINDING FOR AN AIR-COOLED DRY TRANSFORMER WITH DISTANCE ELEMENTS IN THE AIR CHANNELS
US20140361862A1 (en) * 2013-06-11 2014-12-11 Abb Technology Ag Radial drop winding for open-wound medium voltage dry type transformers with improved support structure
US9214273B2 (en) * 2013-06-11 2015-12-15 Abb Technology Ag Radial drop winding for open-wound medium voltage dry type transformers with improved support structure
US20150371775A1 (en) * 2013-06-11 2015-12-24 Abb Technology Ag Radial drop winding for open-wound medium voltage dry type transformers with improved support structure
US11049645B2 (en) * 2017-03-24 2021-06-29 Abb Power Grids Switzerland Ag Transformer with air guiding plates
US20230162915A1 (en) * 2020-04-20 2023-05-25 Hitachi Energy Switzerland Ag Component and method for manufacturing insulating spacers

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