US3837072A - Method of manufacturing a coherent roebel bar coil - Google Patents

Method of manufacturing a coherent roebel bar coil Download PDF

Info

Publication number
US3837072A
US3837072A US00417973A US41797373A US3837072A US 3837072 A US3837072 A US 3837072A US 00417973 A US00417973 A US 00417973A US 41797373 A US41797373 A US 41797373A US 3837072 A US3837072 A US 3837072A
Authority
US
United States
Prior art keywords
strand
bundle
bundles
coil
roebel
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
US00417973A
Other languages
English (en)
Inventor
Lennart Moberg
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.)
ABB Norden Holding AB
Original Assignee
ASEA AB
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 ASEA AB filed Critical ASEA AB
Application granted granted Critical
Publication of US3837072A publication Critical patent/US3837072A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
    • H02K3/14—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots with transposed conductors, e.g. twisted conductors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/04—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of windings, prior to mounting into machines
    • H02K15/0414—Windings consisting of separate elements, e.g. bars, hairpins, segments, half coils
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/04—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of windings, prior to mounting into machines
    • H02K15/0414—Windings consisting of separate elements, e.g. bars, hairpins, segments, half coils
    • H02K15/0421—Windings consisting of separate elements, e.g. bars, hairpins, segments, half coils consisting of single conductors, e.g. hairpins
    • 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
    • Y10T29/49009—Dynamoelectric machine
    • 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

  • the present invention relates to a method of manu-- facturing winding coils for the stators of large a.c. rotary machines, for example for machines within the range 1 1000 MVA.
  • the object of a method accordingto the invention is to provide a coil in which each coil side is designed as a roebel bar, without it being necessary for that reason to make the coil sides of separate bars, which are finally connected to each other.
  • Roebel bars are particularly advantageous in very large machines, but if the roebel bars are manufactured in an appropriate manner it may be economically justifiable to introduce roebel bars also in machines with such low power as l MVA.
  • Roebel bars are known per se and'many recently manufactured generators have statorwindings in which the coil sides are made in the form of roebel bars. Roebel bars are described in the German Pat. No. 277,012 and in the US. Pat. No. 2,821,641, but also outside the patent literature, for example in Standard Handbook for Electrical Engineers, McGraw Hill, th Edition, Sec. 6, page 31.
  • a coil side made in the form ofa roebel bar contains a first and a second disc positioned adjacent to each other, each strand disc being shaped to alternate between the rightand the left-hand sides of the coil side and each strand being made with at least one portion bent sideways, in such a way that, in a strand disc, portions bent sideways and portions not bent sideways lie on opposite sides of an axial plane through the center'of the roebel bar.
  • the ends of the bar are then electricallyconnected so that coils are formed.
  • the present invention describes a method which makes it possible to manufacture a roebel coil consisting of unjoinedstrand coils and without reduction of the accuracy, using fewer working hours than is required for conventional coils consisting of 'roebelbars which are soldered together.
  • such a roebel bar is produced by interfitting two hairpin-shaped bundles of strand loops and thereafter bending the interfitted bundles into a formed coil.
  • a plurality of hairpin-shaped parts having strand loop ends, and fitting one within the other, are displaced longitudinally with respect to each other.
  • the loops of greater radius of curvature are displaced away from the loop at least radius of curvature, while in the other bundle they are displaced towards the loop of greatest radius of curvature, being bent out of the plane of and overlying the loop of lesser radius of curvature. Both bundles are then bent sidewise at a distance along the length of thebundle from the nearest loop ends.
  • the strand loops are then displaced relative to each other in the opposite direction, until their loop ends are substantially in contacting relation with each other.
  • the strand loops are then successively bent across each other, thereby transposing the strand loops to form a roebel bar section.
  • FIGS. 1 to 4 show different stages in the manufacture of a roebel bar. While FIGS. 1 to 4 illustrate a conventional roebel bar, they also illustrate how a coil side of a coil made according to the invention is put together in principle.
  • FIGS. 5, 6, 7, 7a, 8, 8a, 9 and 10 show different stages in a method according to the invention
  • FIGS. 5, 7 and 8 show strand loop bundles lying in a horizontal plane seen in the vertical direction
  • FIGS. 7a and 8a show the strand loop bundles of FIGS. 7 and 8 seen from the side.
  • FIG. 6 shows a cross-section along the line VIVI of FIG. 5.
  • FIG. 10 shows a cross-section along the line XX through a coil side of the coil shown in FIG. 9.
  • FIG. 1 designates a strand for a roebel bar and 2 a sidewise-bent strand portion, the extension of which in the longitudinal direction of the strand is designated a.
  • FIG. 2 shows one and FIG. 3 the other of two socalled strand discs which are arranged adjacent to each other in the winding slot in such a manner that the roebel bar illustrated in FIG. 4 is formed.
  • a method according to the invention can be started by cutting up a plurality of insulated strand bars, giving each one a length which is sufficient for a one-turn coil, that is, somewhat more than 2.5 times the length of the winding slot.
  • the strand bars are divided up into two bundles with, for example, four strands in each bundle (as'shown in FIGS. 5-10), and each bundle is bent in the middle so that two hairpin-shaped bundles 3 are formed.
  • Each bundle 3 has two shanks 7 which are mutually connected by means of a plurality of strand loop ends lying close to each other in FIG. 5.
  • the radius of curvature of the outermost strand loop end 4 is several times greater than the radius of curvature of the innermost strand loop end 5.
  • the number of adjacently placed strands is usually far greater than what has been shown in the drawing, for example twenty.
  • each strand loop end forms a connection between two strands intended for the same coil but for different roebel bars and different winding slots of a stator for an ac machine.
  • each bundle 3 of strand loops the strand loops are then mutually displaced in the longitudinal direction, but in different ways, namely, according to FIG. 7 as far as one bundle is concerned and according to FIG. 8 as far as the other bundle is concerned.
  • a strand loop end 5 it is evident from the drawing that the other strand loops face in the direction of the convex surface of the loop end 5 in the case shown in FIGS. 7 and 7a, but in the direction of the concave surface of the same loop end in the case shown in FIGS. 8 and 8a.
  • the strands must, at the same time, be bent a little near the strand loop ends in such a way that the loop ends lie in planes crossing each other.
  • the hairpin-shaped bundles 3 are treated by means of a bending tool, thus forming sidewise-bent bundle portions 6 in the hairpin-shaped bundles shown in FIG. 7 and FIG. 8 by bending simultaneously all the strands of a bundle, and in both cases at a distance b from the nearest strand loop end, that is, the loop end of the least radius of curvature in FIG. 7 and of the greatest radius of curvature in FIG. 8.
  • the sidewise-bent bundle portion 6 has the same shape as the sidewise-bent strand portion 2.
  • the strand loops are pushed together within each bundle, thus giving the strand loop ends of each group the original mutual positioning, shown in FIG. 5.
  • each shank of a hairpin-shaped bundle which has been subjected to a shaping according to FIG. 7 or FIG. 8 the differently bent strand parts 2 are now distributed at constant mutual distances in the axial direction, equal to the spacing of the loop ends in FIG. 7.
  • the transposition is then started by making, in each shank 7, a portion 2, belonging to the strand loop having the smallest radius of curvature, cross all the other strands. Similar crossings are carried out for the rest of the strands in a known manner until each of the two shanks form one strand disc according to FIG. 2.
  • the transposition is started by making, in each shank 7, one portion 2, belonging to the strand loop having the greatest radius of curvature, cross all other strands, and this is continued in a known manner until each of the two shanks of the bundle form one strand disc according to FIG. 3.
  • the strand discs formed according to the invention are put together or interfitted to form two roebel bars which are included in a resultant hairpinshaped bundle. This is then clamped in a forming machine and subjected to formation of a form coil by spreading the parallel sides ofa one-plane coil, thus obtaining a one-turn form coil according to FIGS. 9 and 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Windings For Motors And Generators (AREA)
US00417973A 1972-12-08 1973-11-21 Method of manufacturing a coherent roebel bar coil Expired - Lifetime US3837072A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7216005A SE379610B (xx) 1972-12-08 1972-12-08

Publications (1)

Publication Number Publication Date
US3837072A true US3837072A (en) 1974-09-24

Family

ID=20301589

Family Applications (1)

Application Number Title Priority Date Filing Date
US00417973A Expired - Lifetime US3837072A (en) 1972-12-08 1973-11-21 Method of manufacturing a coherent roebel bar coil

Country Status (11)

Country Link
US (1) US3837072A (xx)
JP (1) JPS4988007A (xx)
BR (1) BR7309587D0 (xx)
CA (1) CA1000036A (xx)
CH (1) CH558101A (xx)
DE (1) DE2358765A1 (xx)
FR (1) FR2210041A1 (xx)
GB (1) GB1447678A (xx)
IT (1) IT996926B (xx)
NO (1) NO133918C (xx)
SE (1) SE379610B (xx)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0932241A2 (de) * 1998-01-26 1999-07-28 ABBPATENT GmbH Verfahren zur Herstellung von Leiterstäben
US6313556B1 (en) * 1999-09-30 2001-11-06 Reliance Electric Technologies, Llc Superconducting electromechanical rotating device having a liquid-cooled, potted, one layer stator winding
US6536093B2 (en) * 2000-04-04 2003-03-25 General Electric Company Assembly line method for and method of producing armature coils
US20050248222A1 (en) * 2003-04-28 2005-11-10 Evangelos Laskaris T Superconducting multi-pole electrical machine
CN104539074A (zh) * 2014-12-06 2015-04-22 南阳防爆集团股份有限公司 一种发电机定子线圈换位结构
WO2019228846A1 (de) * 2018-05-28 2019-12-05 Thyssenkrupp Ag Verfahren zur herstellung von formlitze, verfahren zur herstellung eines elektromotors, sowie verwendung von formlitze
EP3605797A1 (de) 2018-08-01 2020-02-05 Siemens Aktiengesellschaft Zahnspule für einen stator einer elektrischen rotierenden maschine
IT202100017636A1 (it) 2021-07-05 2023-01-05 Tecnomatic Spa Metodo e apparato di assemblaggio di un avvolgimento di hairpin
IT202200006170A1 (it) 2022-03-29 2023-09-29 Tecnomatic Spa Sistema e procedimento di assemblaggio di un avvolgimento statorico o rotorico
IT202200012530A1 (it) 2022-06-14 2023-12-14 Tecnomatic Spa Dispositivo rimovibile di inserimento e movimentazione di conduttori basici per l’assemblaggio di un avvolgimento statorico o rotorico
US11962206B2 (en) 2018-06-20 2024-04-16 Tecnomatic S.P.A. Device and method for bending hairpin winding heads

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH634694A5 (en) * 1978-06-27 1983-02-15 Bbc Brown Boveri & Cie Method and device for producing a roebel bar consisting of conductor elements

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1144252A (en) * 1912-03-18 1915-06-22 Bbc Brown Boveri & Cie Electrical conductor.
US2896102A (en) * 1957-03-04 1959-07-21 Mc Graw Edison Co Electrical conductor and process for making same
US3280244A (en) * 1962-07-18 1966-10-18 Licentia Gmbh Transposed conductor bar

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1144252A (en) * 1912-03-18 1915-06-22 Bbc Brown Boveri & Cie Electrical conductor.
US2896102A (en) * 1957-03-04 1959-07-21 Mc Graw Edison Co Electrical conductor and process for making same
US3280244A (en) * 1962-07-18 1966-10-18 Licentia Gmbh Transposed conductor bar

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0932241A2 (de) * 1998-01-26 1999-07-28 ABBPATENT GmbH Verfahren zur Herstellung von Leiterstäben
EP0932241A3 (de) * 1998-01-26 2000-09-13 ABBPATENT GmbH Verfahren zur Herstellung von Leiterstäben
CN1319253C (zh) * 1998-01-26 2007-05-30 阿尔斯通公司 制造导体杆的方法和定子绕组
US6313556B1 (en) * 1999-09-30 2001-11-06 Reliance Electric Technologies, Llc Superconducting electromechanical rotating device having a liquid-cooled, potted, one layer stator winding
US6536093B2 (en) * 2000-04-04 2003-03-25 General Electric Company Assembly line method for and method of producing armature coils
US6735847B2 (en) 2000-04-04 2004-05-18 General Electric Company Assembly line method for and method of producing armature coils
US20050248222A1 (en) * 2003-04-28 2005-11-10 Evangelos Laskaris T Superconducting multi-pole electrical machine
US8212437B2 (en) * 2003-04-28 2012-07-03 General Electric Company Superconducting multi-pole electrical machine
CN104539074A (zh) * 2014-12-06 2015-04-22 南阳防爆集团股份有限公司 一种发电机定子线圈换位结构
CN104539074B (zh) * 2014-12-06 2017-04-05 南阳防爆集团股份有限公司 一种发电机定子线圈换位结构
WO2019228846A1 (de) * 2018-05-28 2019-12-05 Thyssenkrupp Ag Verfahren zur herstellung von formlitze, verfahren zur herstellung eines elektromotors, sowie verwendung von formlitze
EP3804104A1 (de) * 2018-05-28 2021-04-14 Jheeco E-Drive Ag Verfahren zur herstellung von formlitze, verfahren zur herstellung eines elektromotors, sowie verwendung von formlitze
US11962206B2 (en) 2018-06-20 2024-04-16 Tecnomatic S.P.A. Device and method for bending hairpin winding heads
EP3605797A1 (de) 2018-08-01 2020-02-05 Siemens Aktiengesellschaft Zahnspule für einen stator einer elektrischen rotierenden maschine
IT202100017636A1 (it) 2021-07-05 2023-01-05 Tecnomatic Spa Metodo e apparato di assemblaggio di un avvolgimento di hairpin
IT202200006170A1 (it) 2022-03-29 2023-09-29 Tecnomatic Spa Sistema e procedimento di assemblaggio di un avvolgimento statorico o rotorico
IT202200012530A1 (it) 2022-06-14 2023-12-14 Tecnomatic Spa Dispositivo rimovibile di inserimento e movimentazione di conduttori basici per l’assemblaggio di un avvolgimento statorico o rotorico

Also Published As

Publication number Publication date
IT996926B (it) 1975-12-10
JPS4988007A (xx) 1974-08-22
GB1447678A (en) 1976-08-25
BR7309587D0 (pt) 1974-08-29
CA1000036A (en) 1976-11-23
NO133918B (xx) 1976-04-05
DE2358765A1 (de) 1974-06-12
CH558101A (de) 1975-01-15
FR2210041A1 (xx) 1974-07-05
NO133918C (xx) 1976-07-14
SE379610B (xx) 1975-10-13

Similar Documents

Publication Publication Date Title
US3837072A (en) Method of manufacturing a coherent roebel bar coil
EP2730009B1 (en) Stator for an electric machine
DE112014005444T5 (de) Anker für eine elektrische Maschine
CN112640262A (zh) 用于电机的定子
US6926588B2 (en) Band coil
DE102013203249A1 (de) Stator einer elektrischen Drehmaschine
US4417388A (en) Method of making a multiple open turn lap wound dynamoelectric machine
US4270065A (en) Four pole wave wound direct current machine with multi-turn armature coils
US3188377A (en) Armature bar transposition
JPS619142A (ja) ３相交流発電機固定子の巻線方法
US11171549B2 (en) Method for forming coil and method for manufacturing stator
US7459825B2 (en) Stator winding rod
US3531672A (en) Stator winding having maximum of two adjacent end turns
CN1333511C (zh) 用于电机的绕组
US4857790A (en) Winding patterns for armatures
GB1501952A (en) Linear induction motor
US3292025A (en) Dynamoelectric machine rotor end winding
US1306625A (en) Dynamo-electric machine
US3697791A (en) Rotor for dynamoelectric machines
US1571914A (en) Armature of dynamo-electric machines
JPH06101904B2 (ja) 多重巻亀甲形固定子コイルの結線方法
US1462580A (en) Method of manufacturing electric conductors
SU1280671A1 (ru) Статор электрической машины
RU209763U1 (ru) Стержень обмотки статора электрической машины переменного тока
JPS5936123Y2 (ja) 回転電機のレ−ベル転位コイル