WO2019192665A1 - Bague de court-circuit et rotor en court-circuit pour machine asynchrone - Google Patents

Bague de court-circuit et rotor en court-circuit pour machine asynchrone Download PDF

Info

Publication number
WO2019192665A1
WO2019192665A1 PCT/EP2018/000159 EP2018000159W WO2019192665A1 WO 2019192665 A1 WO2019192665 A1 WO 2019192665A1 EP 2018000159 W EP2018000159 W EP 2018000159W WO 2019192665 A1 WO2019192665 A1 WO 2019192665A1
Authority
WO
WIPO (PCT)
Prior art keywords
ring
short
rotor
circuit
asynchronous machine
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/EP2018/000159
Other languages
German (de)
English (en)
Inventor
Gerhard Thumm
Volker Voggeser
Michael Wolf
Christoph Kästle
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.)
Wieland Werke AG
Original Assignee
Wieland Werke AG
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 Wieland Werke AG filed Critical Wieland Werke AG
Priority to EP18717505.4A priority Critical patent/EP3776822A1/fr
Priority to PCT/EP2018/000159 priority patent/WO2019192665A1/fr
Publication of WO2019192665A1 publication Critical patent/WO2019192665A1/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
    • H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H02K15/021—Magnetic cores
    • H02K15/023—Cage rotors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K17/00—Asynchronous induction motors; Asynchronous induction generators
    • H02K17/02—Asynchronous induction motors
    • H02K17/16—Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors
    • H02K17/168—Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors having single-cage rotors

Definitions

  • the invention relates to a short-circuit ring for an asynchronous machine and a squirrel-cage rotor for an asynchronous machine.
  • a rotor cage of an asynchronous machine the ends of the
  • Rotor bars are electrically connected to the short circuit rings.
  • the quality of the connection and its reliability is of great importance for the performance and efficiency of the asynchronous machine.
  • a cohesive connection is generally to be preferred.
  • the connection of the rotor bars with the short circuit rings can be effected by welding.
  • the rotor bars are preferably made of copper or a copper alloy.
  • the shorting rings may also be copper or a copper alloy, or alternatively another material such as aluminum. Since the melting points of copper materials and aluminum materials differ significantly, the welding of copper materials with aluminum materials is difficult. The welding of similar materials, however, is less difficult.
  • the use of identical materials for rotor bars and short-circuit rings limits the optimization possibilities in the design of squirrel-cage rotors. Not only performance and efficiency are important, but also the weight and the costs of material and production of an asynchronous machine play an important role.
  • the invention is therefore based on the object to provide a short-circuit ring for an asynchronous, which is inexpensive and can be reliably welded to the ends of the rotor bars of the asynchronous machine.
  • the invention includes a shorting ring for an asynchronous machine, wherein the shorting ring comprises a ring of a first metallic material.
  • a support made of a second metallic material is applied by plating on the radially outer circumferential surface of the ring over its entire circumference.
  • the invention is based on the consideration that the ends of the
  • Rotor bars can be welded particularly well with a short-circuit ring, if the same material or at least one material from the same family of materials is present on the outer circumference of the short-circuit ring as the material from which the rotor bars are formed. This equality or at least similarity of the materials is achieved by a support of a second material is applied to a short-circuit ring, which is formed of any first metallic material on the outer circumference and this second material of the same family of materials as the material Rotor bars is selected. Ideally, the material of the edition of
  • Shorting ring and the material of the rotor bars identical. However, it is also possible to use two different alloys of the same base metal, provided that the melting ranges of the two alloys do not differ significantly.
  • An inventive short-circuit ring thus represents a composite material of two different metallic materials. The composite material is formed so that the first material forms an inner ring which is connected at its outer periphery with an outer ring made of a second material.
  • Such a composite short-circuit ring can be made by applying to a first metallic strip of a first material by a
  • a second metallic strip of a second material is applied.
  • the second strip then forms a support on the first strip.
  • a strip-shaped composite material of different materials is formed.
  • the composite material is then bent into a ring in such a way that the second strip forms the radially outer layer of the ring.
  • the two ends of the 360 ° bent strip are preferably joined together by welding, so that a closed ring is formed.
  • a short-circuit ring is formed which comprises an inner ring made of a first metallic material and a bearing made of a second metallic material applied over the entire circumference of this inner ring.
  • Such a short-circuit ring is a bi-metallic ring in the radial direction.
  • Rotor bars can be selected. He can be chosen so that the
  • the short-circuiting ring has on its outer periphery a material which provides optimum conditions for welding to the ends of the rotor bars.
  • the short-circuit ring can thus be easily and reliably connected to the rotor bars. This allows a
  • Short-circuit ring of the type described a great flexibility in terms of material selection while excellent conditions for a good electrically conductive connection with the rotor bars.
  • the shorting ring is made of a plated band. Clad strips can be provided cheaply and in high quality as semi-finished products. Plating processes, such as laser roll plating, enable the production of composite materials in which the thickness of the individual
  • Material strip can be varied within wide ranges.
  • the thickness of the ring of the first material may be at least twice as large as the thickness of the support of the second material.
  • the thickness of the ring of the first material may be at least three times as large as the thickness of the support of the second material.
  • the first material may be aluminum or an aluminum alloy.
  • Aluminum-based materials are characterized by high electrical conductivity and low weight. Furthermore, aluminum is a low cost material that is easy to work with. Thus, these materials provide an ideal construction material for
  • the second material may be copper or a copper alloy. Due to their very high electrical conductivity, copper-based materials are the preferred materials for the rotor bars in asynchronous machines.
  • copper-based materials are the preferred materials for the rotor bars in asynchronous machines.
  • the overlay on the outer circumference of the shorting ring is made of copper or a copper alloy, material uniformity can be achieved between the outer surface of the shorting ring and the rotor bars, or at least similar in material. Thus, very good conditions for a welded connection between short-circuit ring and Rotor bars before.
  • the squirrel-cage rotor comprises a rotor core, which has a plurality of recesses, and a rotor cage of short-circuit rings attached to the rotor core and electrically conductive rotor bars which are inserted into the recesses of the rotor core so that the rotor bars protrude at their end regions have the rotor laminations.
  • the short-circuit rings each have a ring made of a first metallic material.
  • a support made of a second metallic material is applied by plating on the radially outer circumferential surface of the ring over its entire circumference.
  • the rotor bars are formed of a material which is similar to the material of the support of the short-circuit rings, and the
  • End areas of the rotor bars are with the overlay of the shorting rings
  • Short-circuit rotor with short-circuit rings according to the invention and rotor bars which are formed from a same material as the support on the outer circumference of the short-circuit rings, characterized by a high flexibility in terms of material selection and an excellent connection between the shorting rings and the rotor bars.
  • Identical in this context means that the two materials come from the same family of materials. This ensures that the melting temperatures of the two materials are not far apart. For alloys that have a certain melting interval, the melting intervals of the two materials should at least overlap.
  • Fig. 1 is a plated band
  • Fig. 2 is a short-circuit ring
  • Fig. 3 shows a squirrel cage rotor with short circuit rings in longitudinal section
  • Fig. 1 shows a clad strip 8.
  • the strip 8 has a first metallic strip 81 to which a second metallic strip 82 is applied by plating.
  • the band 8 represents a composite material.
  • the short-circuit ring 1 has an inner ring 2 made of a first material. On the outer circumference of the ring 2, a support 3 is applied from a second material. The support 3 thus forms a concentric with the inner ring 2 arranged outer ring.
  • the short-circuit ring 1 is made of a plated band 8 shown in FIG. For this purpose, the band 8 is bent annularly. From the first metallic strip 81 of the plated strip, the inner ring 2 of the
  • Short circuit ring 1 is formed, while from the second metallic strip 82 of the plated strip, the support 3 of the short-circuit ring 1 is formed.
  • the short-circuit ring 1 represents a composite short-circuit ring.
  • the plated band 8 is bent 360 ° so that its two ends abut each other. The two ends are welded so that one
  • Closed short-circuit ring 1 is formed, which has a seam 11.
  • FIG. 3 shows a longitudinal section of a squirrel-cage rotor 4 with two short-circuit rings 1 according to FIG. 2.
  • the axis of the squirrel-cage rotor 4 is designated A.
  • the squirrel-cage rotor 4 has a rotor core 5 with recesses. In the recesses of the rotor core 5 rotor blades 6 are introduced, of which in Fig. 3, only one is shown.
  • the end regions 61 of the rotor bars 6 protrude beyond the end faces of the rotor core 5.
  • the squirrel cage rotor 4 has two short-circuit rings 1.
  • Short circuit rings 1 each have a ring 2 and a support 3.
  • the material of the support 3 is equal to the material of the rotor bars 6. This is illustrated by the same hatching of these parts.
  • the short-circuit rings 1 are each attached to the end of the rotor laminations 5.
  • the short-circuit rings 1 are dimensioned such that they adjoin with their outer circumference the radially inwardly directed surface of the end regions 61 of the rotor bars 6.
  • the overlay 3 of the short-circuit rings 1 is thus located directly next to the material-identical end regions 61 of the rotor bars 6.
  • the welding can be done in the axial or in the radial direction.
  • the weld seam 7 preferably extends as far as the end face of the rotor core 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Induction Machinery (AREA)

Abstract

L'invention concerne une bague de court-circuit (1) destinée à une machine asynchrone et comprenant une bague (2) en un premier matériau métallique. Un support (3) en un deuxième matériau métallique est appliqué par placage sur la totalité de la surface circonférentielle radialement extérieure de la bague (2). En outre, l'invention concerne un rotor en court-circuit (4) comprenant une telle bague de court-circuit (1) et des barres de rotor (6) qui sont formés à partir d'un matériau de même nature que le matériau du support (3) de la bague de court-circuit (1).
PCT/EP2018/000159 2018-04-04 2018-04-04 Bague de court-circuit et rotor en court-circuit pour machine asynchrone Ceased WO2019192665A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP18717505.4A EP3776822A1 (fr) 2018-04-04 2018-04-04 Bague de court-circuit et rotor en court-circuit pour machine asynchrone
PCT/EP2018/000159 WO2019192665A1 (fr) 2018-04-04 2018-04-04 Bague de court-circuit et rotor en court-circuit pour machine asynchrone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2018/000159 WO2019192665A1 (fr) 2018-04-04 2018-04-04 Bague de court-circuit et rotor en court-circuit pour machine asynchrone

Publications (1)

Publication Number Publication Date
WO2019192665A1 true WO2019192665A1 (fr) 2019-10-10

Family

ID=61972073

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/000159 Ceased WO2019192665A1 (fr) 2018-04-04 2018-04-04 Bague de court-circuit et rotor en court-circuit pour machine asynchrone

Country Status (2)

Country Link
EP (1) EP3776822A1 (fr)
WO (1) WO2019192665A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3517238A (en) * 1968-04-04 1970-06-23 Gen Electric Squirrel cage rotor and method of building the same
US20110175484A1 (en) * 2010-01-21 2011-07-21 Gm Global Technology Operations, Inc. Methods of manufacturing induction rotors with conductor bars having high conductivity and rotors made thereby
DE102012203195A1 (de) 2011-03-11 2012-09-13 GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) Schweißvorrichtung für einen Induktionsmotor und Verfahren zum Schweißen eines Induktionsmotors
US20120228985A1 (en) * 2011-03-11 2012-09-13 Fanuc Corporation Squirrel-cage rotor of induction motor and production method thereof wherein end ring is brazed with bar
DE102015224577A1 (de) * 2015-12-08 2017-06-08 Bayerische Motoren Werke Aktiengesellschaft Rotor, Verfahren zum Herstellen eines Rotors, Asynchronmaschine und Fahrzeug

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5176504A (ja) * 1974-12-27 1976-07-02 Tokyo Shibaura Electric Co Denkikikinomakisenseizoho
US20050017597A1 (en) * 2003-07-23 2005-01-27 Mays Harold H. End ring support structure for electric motor
EP2404368B1 (fr) * 2009-03-06 2018-06-06 Siemens Aktiengesellschaft Rotor pour un moteur électrique et procédé de production d'un tel rotor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3517238A (en) * 1968-04-04 1970-06-23 Gen Electric Squirrel cage rotor and method of building the same
US20110175484A1 (en) * 2010-01-21 2011-07-21 Gm Global Technology Operations, Inc. Methods of manufacturing induction rotors with conductor bars having high conductivity and rotors made thereby
DE102012203195A1 (de) 2011-03-11 2012-09-13 GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) Schweißvorrichtung für einen Induktionsmotor und Verfahren zum Schweißen eines Induktionsmotors
US20120228985A1 (en) * 2011-03-11 2012-09-13 Fanuc Corporation Squirrel-cage rotor of induction motor and production method thereof wherein end ring is brazed with bar
DE102015224577A1 (de) * 2015-12-08 2017-06-08 Bayerische Motoren Werke Aktiengesellschaft Rotor, Verfahren zum Herstellen eines Rotors, Asynchronmaschine und Fahrzeug

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3776822A1

Also Published As

Publication number Publication date
EP3776822A1 (fr) 2021-02-17

Similar Documents

Publication Publication Date Title
EP2999101B1 (fr) Rotor en court-circuit
WO2017089034A1 (fr) Rotor à cage et procédé de réalisation
DE102022207180B4 (de) Rotor mit Schleifringvorrichtung, Verfahren zur Herstellung eines Rotors mit einer Schleifringvorrichtung und elektrische Maschine mit einem Rotor
DE2903029C2 (de) Kommutator und Verfahren zu seiner Herstellung
EP2524384B1 (fr) Contact électrique et procédé pour sa fabrication
EP3118946B1 (fr) Collecteur rotatif et unité comprenant un collecteur rotatif
EP3431788B1 (fr) Coquille de coussinet de palier à bride et procédé de fabrication correspondant
EP3393016B1 (fr) Procédé de fabrication d'un rotor à court-circuit et rotor à court-circuit
EP3776822A1 (fr) Bague de court-circuit et rotor en court-circuit pour machine asynchrone
EP3534512B1 (fr) Rotor en court-circuit et procédé de fabrication d'un rotor en court-circuit
DE19522671C2 (de) Käfigläufer für eine Asynchronmaschine
DE102011083901B4 (de) Kommutator einer elektrischen Maschine, elektrische Maschine sowie Verfahren zur Herstellung eines Kommutators
EP3716415B1 (fr) Bague collectrice ainsi qu'unité de bague collectrice dotée d'une bague collectrice
DE112015007159T5 (de) Rotierende elektrische Maschine
EP3301795A1 (fr) Procédé de fabrication d'une bague de court-circuit
EP3275031B1 (fr) Connecteur de cellules ainsi que système avec un connecteur de cellules
EP4277096A1 (fr) Rotor d'un moteur à rotor à cage d'écureuil et son procédé de fabrication
DE102019122334A1 (de) Rotor für eine elektrische Asynchronmaschine und Vormodul zur Verwendung bei dessen Herstellung
WO1998001935A1 (fr) Rotor pour moteur asynchrone, procede de fabrication dudit rotor, et moteur asynchrone
DE217352C (fr)
WO2001031765A1 (fr) Procede pour produire une bande
DE102023203876A1 (de) Erdungseinsatz zur Erdung einer Rotorwelle einer elektrischen Maschine
DD231684A1 (de) Kommutator fuer kleinstmaschinen
DE19849926A1 (de) Verfahren zur Herstellung eines Rotors für einen Asynchronmotor und durch das Verfahren hergestellter Rotor
DE102019122336A1 (de) Verfahren zum Aufbau eines Vormoduls zur Verwendung bei der Herstellung eines Rotors einer elektrischen Asynchronmaschine

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18717505

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2018717505

Country of ref document: EP

Effective date: 20201104