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WO1998001935A1 - Rotor pour moteur asynchrone, procede de fabrication dudit rotor, et moteur asynchrone - Google Patents

Rotor pour moteur asynchrone, procede de fabrication dudit rotor, et moteur asynchrone Download PDF

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Publication number
WO1998001935A1
WO1998001935A1 PCT/EP1997/003453 EP9703453W WO9801935A1 WO 1998001935 A1 WO1998001935 A1 WO 1998001935A1 EP 9703453 W EP9703453 W EP 9703453W WO 9801935 A1 WO9801935 A1 WO 9801935A1
Authority
WO
WIPO (PCT)
Prior art keywords
short
rods
rotor
circuit rings
asynchronous motor
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/EP1997/003453
Other languages
German (de)
English (en)
Inventor
Andreas GRÜNDL
Bernhard Hoffmann
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.)
Gruendl und Hoffmann GmbH Gesellschaft fuer Elektrotechnische Entwicklungen
Original Assignee
Gruendl und Hoffmann GmbH Gesellschaft fuer Elektrotechnische Entwicklungen
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 Gruendl und Hoffmann GmbH Gesellschaft fuer Elektrotechnische Entwicklungen filed Critical Gruendl und Hoffmann GmbH Gesellschaft fuer Elektrotechnische Entwicklungen
Publication of WO1998001935A1 publication Critical patent/WO1998001935A1/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

  • Rotor for an asynchronous motor Method for producing the rotor, and asynchronous motor
  • the invention relates to a rotor for an asynchronous motor, a method for producing the rotor, and an asynchronous motor with such a rotor.
  • the squirrel cage entirely from aluminum. This is preferably implemented in such a way that the complete short-circuit rotor cage is cast into the sheet metal package as an aluminum die-cast part. This allows the rotor weight (based on volume) to be reduced. In addition, the production is significantly cheaper. However, the volume (with the same performance of the motor) increases significantly due to the reduced conductivity of aluminum, since the rods must have a larger cross section. From DE 29 32 952 AI it is known to melt aluminum in the form of a ring. Then the rotor laminated core with the inserted aluminum rods is lowered so far into the aluminum melt that the protruding ends of the aluminum rods dip into the melt and form an integral connection with the ring-shaped aluminum melt when it cools down.
  • a cage winding for rotors of electrical machines which consists of bars that are embedded in grooves in the rotor and are connected at both ends by short-circuit rings. These short-circuit rings are subdivided in the axial direction. In addition, these ring elements are further divided into segments by radial decomposition. The segments are connected to each other by a connecting piece per lattice bar.
  • the bars, segments and connectors can be made of alloy copper.
  • the bars can be made of hard copper, while the segments and the connecting pieces are made of electrical resistance material. This ensures that a large part of the losses arise at the location where they can also be discharged.
  • the invention is therefore based on the problem of providing a rotor for an asynchronous motor which, with the same output, allows a more economical and compact design.
  • the solution to this problem according to the invention consists in a rotor for an asynchronous motor, which has on its periphery arranged electrically conductive rods which pass through on its Short-circuit rings arranged on both end faces are connected to one another, the short-circuit rings being formed from an alloy containing aluminum as an essential constituent and the rods being formed from an alloy containing copper as an essential constituent.
  • short-circuit rings from aluminum requires larger cross-sections for the short-circuit rings for the same performance of the asynchronous motor.
  • the short-circuit rings contain at least 70% by weight, preferably at least 95% by weight aluminum, and the rods contain at least 70% by weight, preferably at least 95% by weight copper.
  • the invention also provides a method for producing a rotor for an asynchronous motor, comprising the following steps:
  • the two short-circuit rings are connected to the rods by friction welding, preferably by ultrasonic welding, or by electron beam welding.
  • the invention also relates to an asynchronous motor with a stator and a rotor assembly, in which the rotor assembly has a laminated core with recesses extending from one end face to the other end face of the laminated core, and a short-circuit cage which is arranged by rods arranged in the recesses and on short-circuit rings arranged on the two end faces is formed, the
  • the short-circuit rings are formed from an alloy containing aluminum as an essential component and the rods from an alloy containing copper as an essential component.
  • Fig. 1 shows a longitudinal section through a schematically illustrated asynchronous motor along its central axis.
  • FIG. 2 shows a short-circuit rotor cage according to the invention (without shaft and laminated core) in a schematic perspective illustration.
  • the asynchronous motor 10 shown in FIG. 1 has two end plates 12a, 12c and a tubular body 12b on an ironing housing 12.
  • the two Stin plates 12a, 12c are through a plurality of bolts 14 braced against each other along the circumference of the tubular body 12b.
  • annular stator 16 constructed from iron plates and carrying a stator winding 18.
  • stator winding heads 18a, 18b protrude beyond the stator 16.
  • a rotor 20 is arranged concentrically with the stator 16 in its cavity.
  • This rotor is formed by a rotor assembly which has a laminated core 22 with recesses 22a extending from one end face to the other end side of the laminated core 22, and a short-circuit cage 24 which is arranged by rods 26 arranged in the recesses 22a and on the two end faces Short-circuit rings 28a, 28b is formed, the rods 24 being connected to the short-circuit rings 28a, 28b.
  • the short-circuit rings 28a, 28b are formed from an alloy containing aluminum as an essential component and the rods 26 are formed from an alloy containing copper as an essential component.
  • the recesses 22a can run parallel to the central longitudinal axis (or to a shaft 30) of the asynchronous motor 10 or run at an angle thereto, so that the rods 26 also parallel or limited to the central longitudinal axis (or the shaft 30) of the asynchronous motor 10 run.
  • the two aluminum short-circuit rings 28a, 28b which are arranged at a distance from one another, connect a plurality of copper rods 26 (only a few of which are illustrated in FIG. 2), which are spaced evenly along the entire circumference of the facing surfaces of the two Short-circuit rings 28a, 28b are firmly connected to these.
  • the two short-circuit rings 28a, 28b have an essentially rectangular cross section.
  • Short-circuit rings 28a, 28b welded.
  • blind holes are formed in the facing surfaces of the two short-circuit rings 28a, 28b (see detailed view in FIG. 2), into which the respective ends of the rods 26 are inserted.
  • the inserted ends of the rods 26 are connected to the respective short-circuit ring 28b in an electrically conductive and cohesive manner by ultrasonic welding or by electron beam welding.
  • the effective cross-section of the short-circuit rings 28a, 28b made of aluminum is dimensioned such that the electrical resistance and the current resistance is approximately the same as for a short-circuit ring made of copper for the corresponding asynchronous motor. Since the specific weight of aluminum is 2.7 g / cm 3 and the specific weight of copper is 8.93 g / cm3, while the electrical conductivity (at 20 ° C) of aluminum is 37 m / ⁇ " mm and the electrical conductivity ( at 20 ° C) of copper is 56 m / ⁇ * mm, it is possible to produce short-circuit rings with the same electrical resistance but less weight, however, the larger volume of the short-circuit rings made of aluminum does not lead to an increase in the winding heads due to the protruding ends Total installation space of the asynchronous motor.
  • Fan blades (not shown) which are oriented in the axial direction can also be arranged on the surfaces of the two short-circuit rings 28a, 28b which face away from one another.
  • the cross-sectional shape of the rods 26 corresponds to the shape of the recesses in the rotor laminated core.
  • Two or more rods can also be arranged in the recesses in the radial direction and welded to the short-circuit rings 28a, 28b in order to achieve a greater effective resistance when the asynchronous motor starts.
  • the short-circuit rings can axially extend at their radially inner or preferably radially outer surfaces. Fenden have groove-shaped recesses into which the rods are inserted and welded as described above.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Induction Machinery (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

L'invention concerne un rotor destiné à un moteur asynchrone, un procédé permettant de fabriquer ledit rotor, ainsi qu'un moteur asynchrone comportant ledit rotor. Le rotor destiné à un moteur asynchrone comporte des tiges électriquement conductrices disposées à sa périphérie, reliées par des bagues courts-circuits disposées sur ses deux faces antérieures. Les bagues sont constituées d'un alliage contenant comme principal composant de l'aluminium, et les tiges d'un alliage contenant comme principal composant du cuivre.
PCT/EP1997/003453 1996-07-03 1997-07-02 Rotor pour moteur asynchrone, procede de fabrication dudit rotor, et moteur asynchrone Ceased WO1998001935A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19626807.9 1996-07-03
DE19626807A DE19626807C1 (de) 1996-07-03 1996-07-03 Rotor für einen Asynchronmotor, Verfahren zur Herstellung des Rotors, und Asynchronmotor

Publications (1)

Publication Number Publication Date
WO1998001935A1 true WO1998001935A1 (fr) 1998-01-15

Family

ID=7798823

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1997/003453 Ceased WO1998001935A1 (fr) 1996-07-03 1997-07-02 Rotor pour moteur asynchrone, procede de fabrication dudit rotor, et moteur asynchrone

Country Status (2)

Country Link
DE (1) DE19626807C1 (fr)
WO (1) WO1998001935A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19904481A1 (de) * 1999-02-04 2000-08-10 Zahnradfabrik Friedrichshafen Drehstrom-Asynchronmotor für Straßenfahrzeuge
DE10258029B4 (de) * 2001-12-21 2010-01-21 Daimler Ag Kurzschlußläufer
DE102014208887A1 (de) * 2014-05-12 2015-11-12 Robert Bosch Gmbh Mittels Reibschweißen hergestellter Käfigläuferrotor
DE102017207671A1 (de) 2017-05-08 2018-11-08 Audi Ag Rotor für eine elektrische Maschine, elektrische Maschine umfassend einen solchen Rotor sowie Verfahren zur Herstellung eines Rotors

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4121926A (en) * 1975-11-18 1978-10-24 Sumitomo Aluminum Smelting Company, Limited Squirrel-cage rotor
JPS54142511A (en) * 1978-04-28 1979-11-06 Toshiba Corp Electrical rotary machine with gear coil
EP0024575A1 (fr) * 1979-08-14 1981-03-11 Siemens Aktiengesellschaft Procédé pour fabriquer des cages à rotor en court-circuit
JPS5649665A (en) * 1979-09-27 1981-05-06 Toshiba Corp Rotor for rotary electric machine
DE3502697A1 (de) * 1984-11-29 1986-06-05 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau Asynchronlaeufer
JPH04308444A (ja) * 1991-04-04 1992-10-30 Hitachi Ltd 小形インダクションモータ
JPH0614507A (ja) * 1992-06-29 1994-01-21 Matsushita Electric Ind Co Ltd ケージロータ
JPH06153469A (ja) * 1992-11-10 1994-05-31 Matsushita Seiko Co Ltd 誘導電動機の回転子導体製造方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1415462A (fr) * 1964-12-04 1965-10-22 Cem Comp Electro Mec Enroulement à cage, élastique et antivibratoire, pour rotor de machine électrique
JPH0716297B2 (ja) * 1987-11-27 1995-02-22 三菱電機株式会社 電動機
DE4111626A1 (de) * 1991-04-10 1992-10-15 Wolfgang Hill Elektrische maschine
DE4234175C2 (de) * 1992-10-09 1995-06-29 Wolfgang Hill Mehrphasige elektrische Maschine mit schleifenlos montierten Leitersträngen
DE4234129C2 (de) * 1992-10-09 1995-03-09 Wolfgang Hill Mehrphasige elektrische Maschine mit zusammenmontierbaren Leiterlagen

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4121926A (en) * 1975-11-18 1978-10-24 Sumitomo Aluminum Smelting Company, Limited Squirrel-cage rotor
JPS54142511A (en) * 1978-04-28 1979-11-06 Toshiba Corp Electrical rotary machine with gear coil
EP0024575A1 (fr) * 1979-08-14 1981-03-11 Siemens Aktiengesellschaft Procédé pour fabriquer des cages à rotor en court-circuit
JPS5649665A (en) * 1979-09-27 1981-05-06 Toshiba Corp Rotor for rotary electric machine
DE3502697A1 (de) * 1984-11-29 1986-06-05 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau Asynchronlaeufer
JPH04308444A (ja) * 1991-04-04 1992-10-30 Hitachi Ltd 小形インダクションモータ
JPH0614507A (ja) * 1992-06-29 1994-01-21 Matsushita Electric Ind Co Ltd ケージロータ
JPH06153469A (ja) * 1992-11-10 1994-05-31 Matsushita Seiko Co Ltd 誘導電動機の回転子導体製造方法

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 004, no. 001 (E - 163) 8 January 1980 (1980-01-08) *
PATENT ABSTRACTS OF JAPAN vol. 005, no. 109 (E - 065) 15 July 1981 (1981-07-15) *
PATENT ABSTRACTS OF JAPAN vol. 017, no. 140 (E - 1336) 22 March 1993 (1993-03-22) *
PATENT ABSTRACTS OF JAPAN vol. 018, no. 218 (E - 1539) 19 April 1994 (1994-04-19) *
PATENT ABSTRACTS OF JAPAN vol. 018, no. 475 (E - 1601) 5 September 1994 (1994-09-05) *

Also Published As

Publication number Publication date
DE19626807C1 (de) 1997-11-20

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