WO2021004675A1 - Rotor pour une machine électrique - Google Patents

Rotor pour une machine électrique Download PDF

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Publication number
WO2021004675A1
WO2021004675A1 PCT/EP2020/062483 EP2020062483W WO2021004675A1 WO 2021004675 A1 WO2021004675 A1 WO 2021004675A1 EP 2020062483 W EP2020062483 W EP 2020062483W WO 2021004675 A1 WO2021004675 A1 WO 2021004675A1
Authority
WO
WIPO (PCT)
Prior art keywords
winding
rotor
winding elements
elements
holding
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.)
Ceased
Application number
PCT/EP2020/062483
Other languages
German (de)
English (en)
Inventor
Stefan Veser
Johannes KÖWILEIN
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.)
Voith Patent GmbH
Original Assignee
Voith Patent GmbH
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 Voith Patent GmbH filed Critical Voith Patent GmbH
Publication of WO2021004675A1 publication Critical patent/WO2021004675A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
    • H02K3/51—Fastening of winding heads, equalising connectors, or connections thereto applicable to rotors only
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/26—Rotor cores with slots for windings
    • 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
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/20—Hydro energy

Definitions

  • the invention relates to a method for the vibration diagnostic monitoring of rotating machines, in particular machine sets in water power plants.
  • the rotor disclosed in this document comprises winding elements which are arranged in axially extending grooves of a rotor body, a winding head which is arranged axially next to the rotor body, the winding elements emerging from the grooves in the axial direction in the area of the winding head, then at an angle run in the axial direction and then run again in the axial direction in the region of their axial ends and are connected to further winding elements, and a winding head carrier which is arranged radially inside the winding head, the winding head being connected to the winding head carrier via tension bolts.
  • Two winding elements are arranged in each slot, i.e. the rotor comprises two winding layers.
  • Figure 1 generic rotor in a section perpendicular to the axis
  • FIG. 2 holding elements of a rotor according to the invention
  • FIG. 3 rotor according to the invention in a first lateral view
  • FIG. 4 rotor according to the invention in a second lateral view.
  • FIG. 1 shows in a very schematic representation a section of a rotor according to the prior art in a section perpendicular to the rotor axis.
  • the rotor comprises a rotor body, which is designated by 1.
  • the rotor comprises a multiplicity of winding elements, only two of which are shown and designated by 2 and 3, respectively.
  • the winding elements 2 and 3 are arranged in axially extending grooves of the rotor body, two winding elements being arranged in each groove, one winding element being arranged closer to the axis than the other winding element arranged in the same groove. Therefore, the winding of the rotor is designed as a two-layer winding with top and bottom.
  • the winding element 2 belongs to the top layer and the winding element 3 to the base.
  • FIG. 2 shows two holding bodies for holding the winding elements in the area of the winding head of a rotor according to the invention with the associated tension bolts.
  • the holding bodies are designated with 4 and one of the tension bolts with 6.
  • the Holding bodies 4 have a first part and a second part, the first part being designated by 8 and the second part by 9 in one of the holding bodies 4.
  • the first part 8 protrudes outward in the radial direction beyond the held winding elements, and the second part 9 is arranged in the space between two adjacent winding elements in the same position.
  • the second part 9 of the holding body 4 is designed so that it can support the held winding elements in the tangential or tangential-axial direction. It is clear that the second part 9 of the holding body 4 must be so wide in each case that it adjoins the two adjacent held winding elements in the installed position.
  • the holding body 4 shown in the upper part is intended to engage the winding elements in an area in which they run in the axial direction
  • the holding body shown in the lower part is intended to engage the winding elements in an area, in which the same run inclined to the axial direction.
  • the distance between two adjacent winding elements is greater in the area in which they run in the axial direction than in the area in which they run inclined to the axial direction. Therefore, in Figure 2, the second part 9 of the upper holding body 4 is wider than the second part 9 of the lower holding body 4.
  • the support through the second part 9 of the held winding elements runs in the upper holding body 4 in the tangential direction and in the lower holding body 4 in tangential direction -axial direction (because the held winding elements are inclined here to the axial direction).
  • the holding body 4 with the first 8 and second 9 part are made from one piece.
  • the described support function gives the rotor a higher structural strength, with the number of parts required being kept small by making the holding body 4 according to the invention from one piece.
  • the holding bodies 4 in FIG. 2 can furthermore have a recess, which is denoted by 10 in FIG. 2 and which is provided to receive the head of the bolts 6, such a bolt head being denoted by 11. This can prevent the diameter of the end winding from increasing.
  • FIG. 3 shows part of a rotor according to the invention in an advantageous embodiment in a lateral view in the area of the end winding.
  • FIG. 3 shows a number of winding elements, FIG. 3 only showing the ends of the winding elements which protrude beyond the rotor body and thus form an end winding arranged axially next to the rotor body.
  • a winding element belonging to the top layer is denoted by 2 and a winding element belonging to the base is denoted by 3.
  • FIG. 3 shows a plurality of holding bodies 4 for holding the winding elements according to FIG. 2, which act on the winding elements.
  • the rotor further comprises a plurality of tension bolts 6 and a winding head carrier, the tension bolts connecting the winding head to the winding head carrier by radially penetrating the winding head.
  • FIG. 3 shows only a single strip of the winding head carrier, which is denoted by 5 and which has threaded bores into which the tension bolts 6 can be screwed.
  • the winding head carrier 5 is arranged radially inside the winding head. All embodiments of end winding carriers known from the prior art are suitable for a rotor according to the invention, provided that they are compatible with fastening by means of tie bolts 6.
  • the tension bolts 6 penetrate the holding bodies 4 and connect them to the end winding support 5.
  • the holding bodies 4 form a first and a second group, the holding bodies of the first group engaging the winding elements of the top layer and the holding bodies of the second group engaging the winding elements of the base attack.
  • all of the holding bodies engage the winding elements of the upper layer.
  • the winding elements of the base are only indirectly through the winding elements of the top layer and those acting there Holding bodies are held.
  • the insulation layers of the winding elements are pressed against one another at the crossing points of the winding elements, which can lead to crushing and deformation of the insulation layers due to the relatively small-area loading, whereby the structural strength of the end winding is impaired under high loads and also impaired over time under normal loads can.
  • the winding elements 3 of the base are held directly by their own holding bodies 4 that engage the winding elements 3 of the base.
  • a holding body only has to be able to absorb the forces applied by one layer of winding elements and, on the other hand, the holding bodies attack the insulation layer of the winding elements with a larger area. Both lead to a lower risk of crushing or deformation of the insulation layers. This further increases the structural strength of the rotor.
  • one holding element 4 is penetrated by exactly one associated tension bolt 6 and connected to the winding head carrier 5, so that the tension bolts 6 also form a first and a second group, the tension bolts of the first group, the holding bodies of the first group and the Tension bolts of the second group connect the holding bodies of the second group to the end winding support.
  • embodiments with holding bodies that are penetrated and held by more than one tension bolt are also conceivable.
  • several of the closely spaced holding bodies shown there could form a unit, that is to say, for example, form a curved strip with several projections which is arranged perpendicular to the axis, the projections being formed by several second parts 9.
  • embodiments are also conceivable in which a tension bolt penetrates and holds both a holding body of the first group and a further holding body of the second group.
  • the tie bolt could, for example, have an additional protrusion or ring that can engage the holding body of the second group, and the holding body of the first group could have larger openings than the holding body of the second group, so that the mentioned protrusion or ring through the opening of the Holding body of the first group, but cannot be passed through the opening of the holding body of the second group.
  • the embodiment with separate groups of tie bolts for each layer has the advantage over the embodiment mentioned in the last section that the tie bolts can be designed more simply and, due to the higher number of tie bolts, either the cross section of the same can be selected to be lower or the structural strength further is increased.
  • a holding body can hold a winding element
  • the holding body must at least partially protrude outward in the radial direction beyond the respectively held winding element. It is clear that, in the embodiment according to FIG. 3, a radially arranged intermediate space is therefore to be provided between the winding elements of the upper and the lower support, in which the parts of the holding bodies protruding beyond the winding elements of the lower support are arranged.
  • FIG. 4 shows a further lateral view of the rotor according to the invention.
  • the designations correspond to those from FIG. 3.
  • FIG. 4 shows that the winding elements 3 of the base have a bend extending inward in the radial direction in the area of the winding head, the bend being denoted by 7. This results in an interspace between the winding elements of the upper and the lower support, in which the parts of the holding bodies 4 protruding beyond the winding elements 3 of the support are arranged.
  • the winding elements 2 of the top layer have a bend running outward in the radial direction, or that there is both an inward bending of the winding elements 3 of the base and an outward bending of the winding elements 2 of the top layer.
  • the embodiment according to FIG. 4 has the advantage that the diameter of the rotor in the area of the end winding is not larger than in the case of a corresponding rotor according to the prior art.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)

Abstract

L'invention concerne un rotor pour une machine électrique, comprenant un corps de rotor pourvu de rainures s'étendant axialement, et un enroulement triphasé bicouche présentant une couche inférieure et une couche supérieure ainsi qu'une pluralité d'éléments d'enroulement (2, 3). Chaque rainure contient respectivement deux éléments d'enroulement (2, 3) dont les extrémités font saillie par rapport au corps de rotor. Les éléments d'enroulement extérieurs (2) forment la couche supérieure et les éléments d'enroulement intérieurs (3) forment la couche inférieure. Dans la zone de la tête d'enroulement, les éléments d'enroulement sont respectivement maintenus par des corps de maintien conçus de telle manière que des éléments d'enroulement adjacents (2, 3) peuvent s'appuyer dans la direction tangentielle ou tangentielle-axiale.
PCT/EP2020/062483 2019-07-10 2020-05-06 Rotor pour une machine électrique Ceased WO2021004675A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019118623.4 2019-07-10
DE102019118623.4A DE102019118623A1 (de) 2019-07-10 2019-07-10 Rotor für eine elektrische Maschine

Publications (1)

Publication Number Publication Date
WO2021004675A1 true WO2021004675A1 (fr) 2021-01-14

Family

ID=70682828

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2020/062483 Ceased WO2021004675A1 (fr) 2019-07-10 2020-05-06 Rotor pour une machine électrique

Country Status (2)

Country Link
DE (1) DE102019118623A1 (fr)
WO (1) WO2021004675A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63240343A (ja) * 1987-03-25 1988-10-06 Toshiba Corp 回転電機の回転子
JPH0255545A (ja) * 1988-08-18 1990-02-23 Toshiba Corp 回転電機の回転子
US5606212A (en) * 1993-05-17 1997-02-25 Kabushiki Kaisha Toshiba Rotor of rotary electric-machine
DE102010020415A1 (de) 2010-05-12 2011-11-17 Voith Patent Gmbh Rotor für eine dynamoelektrische Maschine
DE102011105427A1 (de) * 2011-06-20 2012-12-20 Voith Patent Gmbh Elektrische Maschine mit einer Einrichtung zum Überwachen der Rotorgeometrie

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19513457A1 (de) * 1995-04-08 1996-10-10 Abb Management Ag Rotor einer elektrischen Maschine
DE19535700C2 (de) * 1995-09-26 1999-03-04 Vem Elektroantriebe Gmbh Anordnung zur Befestigung der Wickelköpfe am Schleifringläufer einer Asynchronmaschine großen Durchmessers
DE102007000668B4 (de) * 2007-11-08 2025-06-18 Ge Renewable Technologies Rotor einer elektrischen Maschine
ES2805325T3 (es) * 2011-08-11 2021-02-11 Ge Renewable Tech Máquina eléctrica rotativa

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63240343A (ja) * 1987-03-25 1988-10-06 Toshiba Corp 回転電機の回転子
JPH0255545A (ja) * 1988-08-18 1990-02-23 Toshiba Corp 回転電機の回転子
US5606212A (en) * 1993-05-17 1997-02-25 Kabushiki Kaisha Toshiba Rotor of rotary electric-machine
DE102010020415A1 (de) 2010-05-12 2011-11-17 Voith Patent Gmbh Rotor für eine dynamoelektrische Maschine
DE102011105427A1 (de) * 2011-06-20 2012-12-20 Voith Patent Gmbh Elektrische Maschine mit einer Einrichtung zum Überwachen der Rotorgeometrie

Also Published As

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DE102019118623A1 (de) 2021-01-14

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