US2209811A - Magnetic core structure and method of assembling - Google Patents

Magnetic core structure and method of assembling Download PDF

Info

Publication number
US2209811A
US2209811A US228378A US22837838A US2209811A US 2209811 A US2209811 A US 2209811A US 228378 A US228378 A US 228378A US 22837838 A US22837838 A US 22837838A US 2209811 A US2209811 A US 2209811A
Authority
US
United States
Prior art keywords
yokes
magnetic core
assembling
winding leg
leg
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
US228378A
Inventor
Roy H Dierstein
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 US228378A priority Critical patent/US2209811A/en
Application granted granted Critical
Publication of US2209811A publication Critical patent/US2209811A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F30/00—Fixed transformers not covered by group H01F19/00
    • H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
    • H01F30/10—Single-phase transformers
    • 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
    • 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
    • Y10T29/49073—Electromagnet, transformer or inductor by assembling coil and core
    • 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
    • Y10T29/49075—Electromagnet, transformer or inductor including permanent magnet or core
    • Y10T29/49078—Laminated
    • 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
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/5313—Means to assemble electrical device
    • Y10T29/5317—Laminated device

Definitions

  • MAGNETIC com STRUCTURE AND METHOD OF ASSEMBLING R. H. DIERSTEIN Filed Sept. 3, 1938 Inventor: Roy H Dlerste'm,
  • My invention relates to magnetic cores such as are used in transformers and reactors.
  • One form of magnetic core which has been used extensively includes an outer hollow shell with a wind- Q ing leg extending across the opening and fitting so tightly between opposite sides of the shell as to hold it securely in place.
  • the shell and the winding leg have been formed of superposed laminations, and it has been found that if the winding leg laminatio'nsare cut or punched from the same positions in the outer shell laminations that they are to occupy when assembled, then the two parts of the core will fit tightly and securely when they are forced together.
  • the winding or windings are of course preferably placed around the winding legbefore it is forced into position in the outer shell. It has been found that when order to avoid too much damage from this cause.
  • the general object of the invention is to pro- :0 vide an improved magnetic core and animproved method for forming the magnetic core having awinding leg held in place by a forced fit in an outer shell, but avoiding any substantial damage to the material during the assembly.
  • Fig; l is a perspective view of a transformer including a magnetic core formed in accordance with the invention, and Fig; 2 is a perspective view show- .ing the transformer partially assembled and a machine or. tool for assembling it.
  • Like reference characters indicate similar parts in both figures of the drawing.
  • the transformer I0 shown 'inFig. 1 includes a magneticcore II having a winding leg I2 fitting tightly between the yokes I3 and surrounded by windings I4.
  • the outer ends of the yokes I3 are punched from the same positions which they are finally to occupy in the laminations of the yokes It so thatithey will be held securely in position when the two parts of the core are assembled.
  • the projections I! fit into the cient force to the block Iqto permit the windintegrallyconnected by outer legs I5 to provide
  • the laminations including the yokes I3 are formed with notches in the outer edges ofthe yoke portions .so that when assembled these notches will be'in' alignment to form a notch I6 extending across each outer surface of the yokes. 5
  • the sides of the notches diverge inwardly from the outer surface of each yoke so that they may be engaged by projections IT on the inner surfaces of blocks I8 and IQ mounted on a suitable 10 notches l6 in dovetail fashion so that the blocks I8 and I9 and the yokes I3 are held securely together.
  • the block I8 is secured to the support while the other block I9 is movable to permit it to be pulled away from the block I8 by a lever 2! to increase the spacing betweenthe yokes.
  • the block I9 may be operated by foot or otherwise by means of a link 22.
  • the laminatlons of the winding leg I2 are out or punched from the positions which they are finally to 00- 3 cupy between the yoke portions I3 of the outer magnetic-Ashen.
  • the windings II are placed around the winding leg I2, and the laminations of the outer shell are dropped into place between the blocks "and I9 with their notches I6 engaged by the projections I] of the blocks.
  • which engages a rod 23 extending between opposite sides of the block I9, is operated to force the block I9 away from the block I8. forces the two projections ll of the two blocks apart and applies pulling'forces to the outer surfaces of the yokes I3 to spring theyokes I3 sufllci'ently away from each other to permit the winding leg I2 with its windings II to be placed in position between the two yokes I3 with! out the necessity of using undue force and consequently without damage to the laminations as they rub together.
  • the invention provides not only a simple and convenient method of assembling the core parts, but an improved core as well because of the more perfect fit between the parts and the absence of injury and distortion to the edges of the laminations.
  • the presence of the notches IS in the outer surfaces of the yokes I3 opposite the ends of the windingleg is obviously not objectionable because they do not interfere .to any substantial 1 degree with the magnetic flux in the core.
  • the notches l6 also permit .the yokes to be easily engaged and spread apart at any time after assembly if repair or replacement of the windings is necessary.
  • said method including the stps of applying pulling forces to the-outer surfaces of the yokes to increase the spacing between them, placing the winding leg between the yokes without substantial friction therebetween, and releasing the yokes to permit them to grip the winding leg.
  • a magnetic core including. a winding leg and spaced integrally connected yokes, said winding leg fitting tightly between the'yokes, and the yokes having dovetail notches across their outer surfaces.
  • a magnetic core including a winding leg and spaced integrally connected yokes, said wind- ..ing leg fitting tightly between the yokes, and

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)

Description

July 30, 1940. 2.209,81l
MAGNETIC com: STRUCTURE AND METHOD OF ASSEMBLING R. H. DIERSTEIN Filed Sept. 3, 1938 Inventor: Roy H Dlerste'm,
b I? His gttovney.
Patented July 30, 1940 PATENT OFFICE v MAGNETIC CORE STRUCTURE AND METHOD ,OF ASSEMBLING Roy H. Dierstein, rm Wayne,Ind., mime; to General Electric Oompany, a corporation of New York Application September 3, 1938, Serial No. 228,378
Claims.
My invention relates to magnetic cores such as are used in transformers and reactors. One form of magnetic core which has been used extensively includes an outer hollow shell with a wind- Q ing leg extending across the opening and fitting so tightly between opposite sides of the shell as to hold it securely in place. The shell and the winding leg have been formed of superposed laminations, and it has been found that if the winding leg laminatio'nsare cut or punched from the same positions in the outer shell laminations that they are to occupy when assembled, then the two parts of the core will fit tightly and securely when they are forced together. The winding or windings are of course preferably placed around the winding legbefore it is forced into position in the outer shell. It has been found that when order to avoid too much damage from this cause.
The general object of the invention is to pro- :0 vide an improved magnetic core and animproved method for forming the magnetic core having awinding leg held in place by a forced fit in an outer shell, but avoiding any substantial damage to the material during the assembly.
The invention will be better understood from the following description taken in connection with the accompanying drawing in which Fig; l is a perspective view of a transformer including a magnetic core formed in accordance with the invention, and Fig; 2 is a perspective view show- .ing the transformer partially assembled and a machine or. tool for assembling it. Like reference characters indicate similar parts in both figures of the drawing.
The transformer I0 shown 'inFig. 1 includes a magneticcore II having a winding leg I2 fitting tightly between the yokes I3 and surrounded by windings I4. The outer ends of the yokes I3 are punched from the same positions which they are finally to occupy in the laminations of the yokes It so thatithey will be held securely in position when the two parts of the core are assembled.
v fiat support 20. The projections I! fit into the cient force to the block Iqto permit the windintegrallyconnected by outer legs I5 to provide The laminations including the yokes I3 are formed with notches in the outer edges ofthe yoke portions .so that when assembled these notches will be'in' alignment to form a notch I6 extending across each outer surface of the yokes. 5 The sides of the notches diverge inwardly from the outer surface of each yoke so that they may be engaged by projections IT on the inner surfaces of blocks I8 and IQ mounted on a suitable 10 notches l6 in dovetail fashion so that the blocks I8 and I9 and the yokes I3 are held securely together. The block I8 is secured to the support while the other block I9 is movable to permit it to be pulled away from the block I8 by a lever 2! to increase the spacing betweenthe yokes. The block I9 may be operated by foot or otherwise by means of a link 22. In assembling the magnetic core It, the laminatlons of the winding leg I2 are out or punched from the positions which they are finally to 00- 3 cupy between the yoke portions I3 of the outer magnetic-Ashen. The windings II are placed around the winding leg I2, and the laminations of the outer shell are dropped into place between the blocks "and I9 with their notches I6 engaged by the projections I] of the blocks. The lever 2|, which engages a rod 23 extending between opposite sides of the block I9, is operated to force the block I9 away from the block I8. forces the two projections ll of the two blocks apart and applies pulling'forces to the outer surfaces of the yokes I3 to spring theyokes I3 sufllci'ently away from each other to permit the winding leg I2 with its windings II to be placed in position between the two yokes I3 with! out the necessity of using undue force and consequently without damage to the laminations as they rub together. In some'cases it may be advisable to apply sufiicient force to the movable block I8 to spread the yokes I3 enough to permit the winding leg I2 to drop freely into place be-- tween the yokes'. It is obvious, however, that it may often .be satisfactory to apply only suming leg If to be forced 'intoposition between the yokes I3 without damage to the laminations.
Any force applied by the lever 2| to the block I9 the yokes l3 to grip the winding leg and hold it securely in place.
The invention provides not only a simple and convenient method of assembling the core parts, but an improved core as well because of the more perfect fit between the parts and the absence of injury and distortion to the edges of the laminations. The presence of the notches IS in the outer surfaces of the yokes I3 opposite the ends of the windingleg is obviously not objectionable because they do not interfere .to any substantial 1 degree with the magnetic flux in the core. The notches l6 also permit .the yokes to be easily engaged and spread apart at any time after assembly if repair or replacement of the windings is necessary.
The invention has been explained by describing and illustrating a particular transformer and a particular method of forming it, but it will be obvious that changes may be made without, departing from the spirit of the invention and the scope of the appended claims.
What I claim as new and desire to secure by Letters Patent of the United States is:
1. The method of forming a magnetic core of flat stacked laminations having a winding leg and spaced integrally connected yokes with the winding leg fitting tightly between the yokes,
said method including the stps of applying pulling forces to the-outer surfaces of the yokes to increase the spacing between them, placing the winding leg between the yokes without substantial friction therebetween, and releasing the yokes to permit them to grip the winding leg.
. 2. The method of forming a magnetic core of punched and stacked laminations having spaced integrally connected yokes and a winding leg fitting tightly between the yokes, said method including the steps of applying pulling forces to the yokes to increase the spacing therebetween by edgewise distortion of the laminations, .placing the winding leg between the yokes without such friction between said leg and said yokes as to cause appreciable injury to the abutting edges of the laminatiops, and releasing the yokes to permit them to grip the winding leg.
3. A magnetic core including. a winding leg and spaced integrally connected yokes, said winding leg fitting tightly between the'yokes, and the yokes having dovetail notches across their outer surfaces.
4; A magnetic core including a winding leg and spaced integrally connected yokes, said wind- ..ing leg fitting tightly between the yokes, and
forming spaced yokes and outer core legs integrally connecting said yokes, and a winding leg fitting tightly between the yokes, the yokes hav-- ing dovetail notches across their outer surfaces.
ROY H. DIERSTEIN.
US228378A 1938-09-03 1938-09-03 Magnetic core structure and method of assembling Expired - Lifetime US2209811A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US228378A US2209811A (en) 1938-09-03 1938-09-03 Magnetic core structure and method of assembling

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US228378A US2209811A (en) 1938-09-03 1938-09-03 Magnetic core structure and method of assembling

Publications (1)

Publication Number Publication Date
US2209811A true US2209811A (en) 1940-07-30

Family

ID=22856939

Family Applications (1)

Application Number Title Priority Date Filing Date
US228378A Expired - Lifetime US2209811A (en) 1938-09-03 1938-09-03 Magnetic core structure and method of assembling

Country Status (1)

Country Link
US (1) US2209811A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2429604A (en) * 1941-07-14 1947-10-28 Nat Inv S Corp Transformer
US2475187A (en) * 1945-02-20 1949-07-05 Kramer Trenton Co Method of producing condensers or the like
US2494349A (en) * 1946-08-21 1950-01-10 Gen Electric Method and means for forming stacked magnetic cores
US3027835A (en) * 1957-12-20 1962-04-03 Deutsche Edelstahlwerke Ag Printing supports and the method of producing them
US3071744A (en) * 1954-12-14 1963-01-01 Advance Transformer Co Electromagnetic core construction
US3219957A (en) * 1957-12-03 1965-11-23 Advance Transformer Co Core for electromagnetic device
US20120056706A1 (en) * 2010-09-02 2012-03-08 Abb Technology Ag Wound transformer core with support structure

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2429604A (en) * 1941-07-14 1947-10-28 Nat Inv S Corp Transformer
US2475187A (en) * 1945-02-20 1949-07-05 Kramer Trenton Co Method of producing condensers or the like
US2494349A (en) * 1946-08-21 1950-01-10 Gen Electric Method and means for forming stacked magnetic cores
US3071744A (en) * 1954-12-14 1963-01-01 Advance Transformer Co Electromagnetic core construction
US3219957A (en) * 1957-12-03 1965-11-23 Advance Transformer Co Core for electromagnetic device
US3027835A (en) * 1957-12-20 1962-04-03 Deutsche Edelstahlwerke Ag Printing supports and the method of producing them
US20120056706A1 (en) * 2010-09-02 2012-03-08 Abb Technology Ag Wound transformer core with support structure
CN102385973A (en) * 2010-09-02 2012-03-21 Abb技术有限公司 Wound transformer core with support structure
AU2011218614B2 (en) * 2010-09-02 2013-12-05 Hitachi Energy Ltd Wound transformer core with support structure
US8957754B2 (en) * 2010-09-02 2015-02-17 Abb Technology Ag Wound transformer core with support structure
CN102385973B (en) * 2010-09-02 2016-08-24 Abb技术有限公司 There is the magnetic core of transformer of the winding of supporting construction

Similar Documents

Publication Publication Date Title
US2209811A (en) Magnetic core structure and method of assembling
US2372067A (en) Electrical apparatus
US2488391A (en) Magnetic core structure
US2516164A (en) Three-phase magnetic core
US2015554A (en) Magnetic wedge
US2400994A (en) Transformer core
GB1328160A (en) Transformers or chokes
US1690154A (en) Transformer
US3553621A (en) Inductor with terminal carrier
GB1261398A (en) Electrical winding structures
US3815067A (en) Chokes or reactors
US2267382A (en) Core for electrical apparatus
US1783050A (en) Magnetic core
US1952917A (en) Method of assembling laminated magnetic cores
US3330978A (en) Coil end support assembly
US2472150A (en) Core clamp
US3160837A (en) Transformer with heat dissipating support means
US2359102A (en) Wound core reactor
US1699142A (en) High-reactance transformer
US2490506A (en) Distribution transformer coil support
US2516165A (en) Method of making three-phase magnetic cores
KR870007540A (en) Cooling device and method of liquid-cooled transformer core
GB1220274A (en) Improvements in or relating to transformers, chokes, and the like
GB1282489A (en) Welding transformer
US2550127A (en) Wound core for electrical induction apparatus