EP1016191A1 - Dispositif destine au stator d'un machine electrique tournante - Google Patents

Dispositif destine au stator d'un machine electrique tournante

Info

Publication number
EP1016191A1
EP1016191A1 EP97924480A EP97924480A EP1016191A1 EP 1016191 A1 EP1016191 A1 EP 1016191A1 EP 97924480 A EP97924480 A EP 97924480A EP 97924480 A EP97924480 A EP 97924480A EP 1016191 A1 EP1016191 A1 EP 1016191A1
Authority
EP
European Patent Office
Prior art keywords
stator
electric machine
rotating electric
machine according
teeth
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.)
Withdrawn
Application number
EP97924480A
Other languages
German (de)
English (en)
Inventor
Mats Leijon
Sören Berggren
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 AB
Original Assignee
ABB 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
Priority claimed from SE9602079A external-priority patent/SE9602079D0/xx
Priority claimed from SE9602083A external-priority patent/SE9602083D0/xx
Application filed by ABB AB filed Critical ABB AB
Publication of EP1016191A1 publication Critical patent/EP1016191A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/48—Fastening of windings on the stator or rotor structure in slots
    • H02K3/487—Slot-closing devices
    • 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
    • H01F27/288—Shielding
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
    • H02K2203/15—Machines characterised by cable windings, e.g. high-voltage cables, ribbon cables

Definitions

  • the water- and oil-cooled synchronous machine described in J. Elektrotechnika is intended for voltages up to 20 kV.
  • the article describes a new insulating system consisting of oil /paper insulation, which makes it possible to immerse the stator completely in oil. The oil can then be used as a coolant while at the same time using it as insulation.
  • a dielectric oil-separating ring is provided at the internal surface of the core.
  • the stator winding is made from conductors with an oval hollow shape provided with oil and paper insulation. The coil sides with their insulation are secured to the slots made with rectangular cross section by means of wedges.
  • coolant oil is used both in the hollow conductors and in holes in the stator walls.
  • Such cooling systems entail a large number of connections of both oil and electricity at the coil ends.
  • the thick insulation also entails an increased radius of curvature of the conductors, which in turn results in an increased size of the winding overhang.
  • the oil-cooled stator winding comprises a conventional high-voltage cable with the same dimension for all the layers.
  • the cable is placed in stator slots formed as circular, radially disposed openings corresponding to the cross-section area of the cable and the necessary space for fixing and for coolant.
  • the different radially located layers of the winding are surrounded by and fixed in insulated tubes. Insulating spacers fix the tubes in the stator slot.
  • an internal dielectric ring is also needed here for sealing the coolant against the internal air gap.
  • the design shows no tapering of the insulation or of the stator slots. The design exhibits a very narrow radial waist between the different stator slots, which implies a large slot leakage flux which significantly influences the magnetization requirement of the machine.
  • the voltage of the machine can be increased to such levels that it can be connected directly to the power network without an intermediate transformer.
  • the step-up transformer is thus ekminated.
  • the object of the present invention is to solve this problem and thus prevent oscillations between the stator teeth. This object is achieved with the method and the device defined in the appended claims.
  • Figure 2 shows an axial view of a sector in a stator core
  • Figures 3 and 4 show axial views of the end of a slot situated at the air gap in the stator core, according to two embodiments of the invention
  • Figure 5 shows an axial view of a sector of a stator core according to a third embodiment of the invention
  • Figure 7 shows an axial section through the stator part corresponding to Figure 6, and Figures 8 and 9 show a radial and an axial view, respectively, partially in section, of the end part of the stator core near the air gap.
  • a spacer or a slot wedge 11 is inserted into the opening of the slot 8.
  • the wedge is made of a material which is electrically non-conducting and is non-magnetic, rigid and strong, e.g., glassfibre-reinforced plastic (epoxy plastic), and extends across the entire axial length of the stator.
  • This wedge is inserted with radial force as indicated by the arrow 12 during assembly, thus providing tangentially stiff connections between the stator teeth at the air gap all round the stator. This stiff connection increases the natural frequency and offers greatly increased rigidity in each individual tooth, and even increased flexural rigidity in the whole stator core.
  • the spacers 11 are wedge-shaped, as described. However, they may also be parallel-epipedic, in which case the tangentially stiff connection can be achieved in accordance with Figure 5. Adhesive joints may also be arranged between the spacers 11 and stator teeth 10, either as the sole fixing means or prior to fixing by means of tangential clamping.
  • FIGS 6-9 illustrate how the slot wedges according to the invention can also be utilized to achieve axial compressive pre-stressing of the stator core 15.
  • the pressure fingers 18 are arranged on each side of the core 15, immediately opposite the stator teeth 10, to act as a force-transmission device to convert the tensile force in the wedges 11 to a uniformly distributed compressive force in the stator core 15.
  • the ends of the wedges are joined together by means of transverse pieces 19 which are able to cooperate with the pressure fingers 18.
  • the transverse pieces 19 in the embodiment shown are joined to the wedges 11 by means of pins 20, slidable in the transverse pieces 19, which are loaded outwardly by means of a compression spring 21.
  • One end of the pressure fingers 18 engages below the transverse piece 19, enabling it to load the transverse piece and thus the wedges in a direction outwards from the laminated core 15.
  • the other end of the pressure fingers 18 is clamped between two devices 22 and 23 connected to the stator frame 17.
  • slot wedges used for tangential positioning of the stator teeth are also utilized advantageously as tie-rods to achieve the requisite compressive stress in the stator core.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

Dans un dispositif destiné à augmenter la rigidité mécanique et la fréquence naturelle du stator dans une machine électrique tournante, lequel stator est doté de dents (10) ménagées entre les fentes (8) recevant l'enroulement, les extrémités libres desdites dents étant situées dans l'entrefer (7) entre le stator et le rotor, un élément d'espacement (11) accroîssant la rigidité est agencé dans chaque espace situé entre les extrémités libres des dents adjacentes (10) du stator. Ces extrémités sont ainsi fixées de manière tangentielle.
EP97924480A 1996-05-29 1997-05-27 Dispositif destine au stator d'un machine electrique tournante Withdrawn EP1016191A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
SE9602079 1996-05-29
SE9602079A SE9602079D0 (sv) 1996-05-29 1996-05-29 Roterande elektriska maskiner med magnetkrets för hög spänning och ett förfarande för tillverkning av densamma
SE9602083A SE9602083D0 (sv) 1996-05-29 1996-05-29 Anordning vid statorn i en roterande elektrisk maskin
SE9602083 1996-05-29
PCT/SE1997/000904 WO1997045937A1 (fr) 1996-05-29 1997-05-27 Dispositif destine au stator d'un machine electrique tournante

Publications (1)

Publication Number Publication Date
EP1016191A1 true EP1016191A1 (fr) 2000-07-05

Family

ID=26662641

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97924480A Withdrawn EP1016191A1 (fr) 1996-05-29 1997-05-27 Dispositif destine au stator d'un machine electrique tournante

Country Status (8)

Country Link
EP (1) EP1016191A1 (fr)
JP (1) JP2000512835A (fr)
CN (1) CN1220050A (fr)
AU (1) AU2989397A (fr)
BR (1) BR9709613A (fr)
CA (1) CA2255725A1 (fr)
EA (1) EA001098B1 (fr)
WO (1) WO1997045937A1 (fr)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0888661B1 (fr) 1996-05-29 2003-11-19 Abb Ab Generateur electrique a courant alternatif haute tension
SE9602079D0 (sv) 1996-05-29 1996-05-29 Asea Brown Boveri Roterande elektriska maskiner med magnetkrets för hög spänning och ett förfarande för tillverkning av densamma
US6972505B1 (en) 1996-05-29 2005-12-06 Abb Rotating electrical machine having high-voltage stator winding and elongated support devices supporting the winding and method for manufacturing the same
SE510452C2 (sv) 1997-02-03 1999-05-25 Asea Brown Boveri Transformator med spänningsregleringsorgan
SE9704412D0 (sv) 1997-02-03 1997-11-28 Asea Brown Boveri Krafttransformator/reaktor
SE9704413D0 (sv) 1997-02-03 1997-11-28 Asea Brown Boveri Krafttransformator/reaktor
SE513083C2 (sv) 1997-09-30 2000-07-03 Abb Ab Synkronkompensatoranläggning jämte användning av dylik samt förfarande för faskompensation i ett högspänt kraftfält
SE513555C2 (sv) 1997-11-27 2000-10-02 Abb Ab Förfarande för applicering av ett rörorgan i ett utrymme i en roterande elektrisk maskin och roterande elektrisk maskin enligt förfarandet
GB2331858A (en) 1997-11-28 1999-06-02 Asea Brown Boveri A wind power plant
GB2331853A (en) 1997-11-28 1999-06-02 Asea Brown Boveri Transformer
SE516002C2 (sv) 2000-03-01 2001-11-05 Abb Ab Roterande elektrisk maskin samt förfarande för framställning av en statorlindning
SE516442C2 (sv) 2000-04-28 2002-01-15 Abb Ab Stationär induktionsmaskin och kabel därför
WO2013110656A1 (fr) 2012-01-26 2013-08-01 Continental Automotive Gmbh Rotor pour machine électrique tournante
CN104160595A (zh) 2012-01-26 2014-11-19 大陆汽车有限公司 用于旋转的电机器的转子和旋转的电机器
DE202012000842U1 (de) 2012-01-26 2012-02-03 Continental Automotive Gmbh Rotor für eine rotierende elektrische Maschine und Elektromotor
DE102015211355A1 (de) * 2015-06-19 2016-12-22 Wobben Properties Gmbh Formspule, Wicklungsaufbau sowie Stator eines Generators einer Windenergieanlage und Verfahren zum Herstellen eines Stators
KR102485025B1 (ko) * 2015-09-14 2023-01-05 엘지이노텍 주식회사 일체형 케이블 및 이를 포함하는 모터 어셈블리
DE112019006999T5 (de) * 2019-03-08 2021-12-09 Mitsubishi Electric Corporation Inspektionsverfahren für eine rotierende elektrische maschine, rotierende elektrische maschine, sowie inspektionssystem für eine rotierende elektrische maschine
CN115133693A (zh) * 2022-08-10 2022-09-30 合肥恒大江海泵业股份有限公司 一种充水式潜水电机定子槽楔

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3158770A (en) * 1960-12-14 1964-11-24 Gen Electric Armature bar vibration damping arrangement
US3444407A (en) * 1966-07-20 1969-05-13 Gen Electric Rigid conductor bars in dynamoelectric machine slots
US3437858A (en) * 1966-11-17 1969-04-08 Glastic Corp Slot wedge for electric motors or generators
SE371348B (fr) * 1973-03-22 1974-11-11 Asea Ab
AT338915B (de) * 1975-02-18 1977-09-26 Dukshtau Alexandr Antonovich Stander fur elektrische maschinen
US4200818A (en) * 1978-08-01 1980-04-29 Westinghouse Electric Corp. Resin impregnated aromatic polyamide covered glass based slot wedge for large dynamoelectric machines
US4425521A (en) * 1982-06-03 1984-01-10 General Electric Company Magnetic slot wedge with low average permeability and high mechanical strength
US5036165A (en) * 1984-08-23 1991-07-30 General Electric Co. Semi-conducting layer for insulated electrical conductors
DE4233558C2 (de) * 1992-09-30 1995-07-20 Siemens Ag Elektrische Maschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9745937A1 *

Also Published As

Publication number Publication date
JP2000512835A (ja) 2000-09-26
WO1997045937A1 (fr) 1997-12-04
EA001098B1 (ru) 2000-10-30
BR9709613A (pt) 1999-08-10
CN1220050A (zh) 1999-06-16
CA2255725A1 (fr) 1997-12-04
AU2989397A (en) 1998-01-05
EA199801057A1 (ru) 1999-08-26

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