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WO2004062067A1 - Machine electrique - Google Patents

Machine electrique Download PDF

Info

Publication number
WO2004062067A1
WO2004062067A1 PCT/DE2003/001959 DE0301959W WO2004062067A1 WO 2004062067 A1 WO2004062067 A1 WO 2004062067A1 DE 0301959 W DE0301959 W DE 0301959W WO 2004062067 A1 WO2004062067 A1 WO 2004062067A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
stator
electrical machine
machine according
clamping sleeves
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/DE2003/001959
Other languages
German (de)
English (en)
Inventor
Ngoc-Thach Nguyen
Eberhard Lung
Oliver Eckert
Karl-Juergen Roth
Stephan Kohl
Ricardo Chombo Vidales
Christa Bauch
Quoc-Dat Nguyen
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of WO2004062067A1 publication Critical patent/WO2004062067A1/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
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H02K1/185—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/15—Mounting arrangements for bearing-shields or end plates
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations

Definitions

  • the invention relates to an electrical machine, in particular an electric motor, with a housing and a stator package fastened in the housing.
  • Such motors which are often constructed as asynchronous motors, are preferably used for applications in the motor vehicle sector. They have to meet the highest reliability and service life requirements in harsh environmental conditions. Nevertheless, they have to be simple to set up and also to be able to manufacture extremely inexpensively in large series in order to be competitive in terms of pricing.
  • the stators of electric motors are often held and fixed by a shrinking process.
  • motor housings which do not have to have any heat capacity as a function for the dissipation and transmission of the heat loss from the motor itself and possibly integrated control units
  • connection technologies such as screwing, clamping, gluing and welding are also used.
  • Asynchronous motors thrive on the radial, small air gap between the stator and rotor packages. Therefore, in most cases, such designs require reworking due to warping or deformation due to the uneven distribution of material in the scope of the manufacturing process.
  • the invention enables an extremely simple positioning and fixing type of the stator package in a motor housing. It is easily possible to compensate for the different thermal expansion between the motor housing made of light metal and the stator package made of sheet steel. In addition, it is easily possible to position the bearing caps for the rotor very precisely and independently of the thermal expansion or cold shrinkage of the light metal housing and still to achieve the smallest possible air gap between the rotor and stator. Time-consuming reworking and thus the undesired removal of chips or the unpredictable risk of jamming, which were often required in the conventional shrinking process, are eliminated.
  • the invention makes use of the knowledge that the motor housing and the outer contour of the stator package can be manufactured with a relatively large tolerance and that precise assembly is nevertheless possible by means of resilient elements which are arranged between the stator package and the motor housing.
  • This connection technology has proven to be extremely reliable in all temperature ranges occurring during the operation of the electrical machine. At the highest permissible operating temperature, which is around 130 ° Celsius, sometimes even up to 160 ° Celsius, any play that may arise between the stator and the motor housing due to the thermal expansion of the motor housing is compensated for by the spring springs of the spring elements.
  • FIG. 2 shows a view of the end face of the electrical machine designed according to the invention
  • Figure 3 shows an electric machine designed according to the invention in longitudinal section
  • Figure 4 is an enlarged partial view of the detail of a cover of an electrical machine designed according to the invention.
  • FIG. 1 shows a known electrical machine 1, namely an electric motor, in a longitudinal section. It comprises a housing 2, which is made of light metal and is essentially hollow-cylindrical and has a base, which is closed at the end by a cover 2a and a base 2b which is recessed for the ball bearing.
  • a stator assembly 3 composed of sheet steel is arranged in the housing 2. Concentric to the stator pack 3, the rotor 4 of the electrical machine 1 is rotatably mounted in two ball bearings 5, 6. The ball bearings 5,6 are fastened in the cover 2a and the housing hub 2b.
  • the stator pack 3 and the housing 2 are frequently connected to one another in a non-positive and non-rotatable manner by a shrink fit.
  • the housing 2 made of light metal is heated and pushed onto the stator pack 3 in the heated state.
  • the housing 2 shrinks and is thus firmly seated on the stator 3.
  • This shrinking process which is popular per se and is widespread in manufacturing technology, is not entirely problem-free.
  • post-processing is often necessary because when the housing is warmed this warps due to the different wall thicknesses.
  • the housing 2 can shrink in such a way that the strength limit of the light metal material used is exceeded.
  • the material at the border zone will therefore flow or plasticize.
  • the material plastifies under high compressive stress and thus loses the clamping or holding force.
  • the housing 2 can expand due to excessive heating of the housing 2, which disadvantageously leads to a greater loosening of the shrink connection as a result of permanent deformation. This repeats itself during a few temperature change cycles and can result in complete failure of the electrical machine 1.
  • the circumstances mentioned require an extremely careful selection of the materials, the manufacturing process and very precise production in order to be able to build very reliable electrical machines. Obviously, this causes considerable costs, especially in large series production.
  • the inventive solution elegantly avoids these problems. It is based on the knowledge that certain assemblies of the electrical machine 1, such as in particular the housing 2 and the stator package 3, can be manufactured with comparatively large tolerances, which considerably simplifies the manufacture of the parts and their assembly in large-scale production and thereby makes them cheaper.
  • Existing play between the assembled parts is compensated for by resilient elements which are arranged between the housing and the stator package and are centered there. These resilient elements ensure a firm connection between the housing and the stator package in the entire operating temperature range that is approved for the operation of the electrical machine. If the housing 2 expands at a high temperature, the resilient elements go along with it in a sufficiently exciting manner and continue to guarantee a torsion-proof and high-precision connection between the housing 2 and the stator pack 3.
  • FIGS. 2, 3 and 4. 2 shows the view of an end face of an electrical machine designed according to the invention.
  • a stator pack 3 is arranged coaxially in the housing 2.
  • the housing 2 and the stator package are clamped together, positioned and fixed by a plurality of spring elements.
  • Spring sleeves 7 are preferably used as spring elements, which are arranged in any number, evenly distributed, on the circumference of the stator pack 3. In the exemplary embodiment shown in FIG. 2, a total of six clamping sleeves 7 are provided, which are thus arranged at a distance of 60 degrees on the circumference of the stator packet 3.
  • the clamping sleeves 7 are essentially hollow cylindrical, with a slot in the housing wall running parallel to the longitudinal axis direction. They are preferably made of spring steel with a suitable preload range. Pin length, material thickness, geometry and material selection enable an optimal design of the adapter sleeves.
  • the length of the clamping sleeves 7 essentially corresponds to the length of the stator 3.
  • the clamping sleeves 7 can be mounted in recesses 8 which are essentially of a hollow cylindrical shape and are formed by the housing 2 and the stator core 3.
  • grooves 9 are arranged in the inner wall of the housing 2, parallel to the longitudinal axis direction, corresponding to the number of clamping sleeves 7. These grooves are essentially semi-cylindrical in cross section.
  • corresponding grooves 10 are also made in the outer lateral surface of the stator core 3.
  • the corresponding grooves in the inner wall of the housing 2 on the one hand and in the outer wall of the stator core 3 on the other hand thus form a plurality of cylindrical recesses 8 into which the clamping sleeves 7 are introduced. After they have been introduced, the clamping sleeves 7 rest resiliently on the inner wall of the housing 2 on the one hand and on the outer circumferential surface of the stator pack 3 on the other hand and thus clamp these parts together.
  • the grooves 9 in the inner wall of the housing 2 can be introduced in a simple manner when the housing 2 is cast or during extrusion.
  • FIG. 3 shows an embodiment according to the invention te electrical machine 1 in longitudinal section.
  • a recess 8 formed by the housing 2 on the one hand and the stator pack 3 on the other hand can be clearly seen, which extends parallel to the longitudinal axis direction at least over the entire length of the stator 3.
  • a clamping sleeve 7 introduced there can be seen.
  • FIG. 4 which shows a view of the end face of the electrical machine formed by the housing 2 and the stator package 3, also reveals a clamping sleeve 7 shown in cross section, which is arranged in a recess 8 formed between the housing 2 and the stator package 3.
  • the solution according to the invention also enables the covers 2a, 2b which close the housing 2 to be assembled in a particularly simple and yet precise manner.
  • the clamping sleeves 7, the length of which essentially corresponds to the length of the housing 2 project beyond the length of the stator packet 3 on both sides by a predetermined amount. They therefore serve at the same time to fill and center the two essentially cup-shaped lids 2a, 2b, which rest with their outer surface on the clamping sleeves 7.
  • the solution according to the invention can be used in all electrical machines in which a stator package is mounted in a housing. It enables a particularly inexpensive and inexpensive manufacturing process, since parts with a comparatively large tolerance can be used. Nevertheless, particularly small fits can be maintained between fixed and rotating parts of an electrical machine. It is particularly advantageous that these good structural properties can also be maintained over a very wide temperature range. Because due to the bracing of the assembled parts by means of spring elements, such as clamping sleeves in particular, temperature-related dimensional changes are largely compensated for. LIST OF REFERENCE NUMBERS

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Frames (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

L'invention concerne une machine électrique (1) comportant une carcasse (2) dans laquelle est disposé un paquet de tôles statoriques (3), ladite carcasse (2) et ledit paquet de tôles statoriques (3) étant bloqués l'un avec l'autre par des moyens de serrage (7) faisant ressort.
PCT/DE2003/001959 2002-12-27 2003-06-12 Machine electrique Ceased WO2004062067A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2002161617 DE10261617A1 (de) 2002-12-27 2002-12-27 Elektrische Maschine
DE10261617.5 2002-12-27

Publications (1)

Publication Number Publication Date
WO2004062067A1 true WO2004062067A1 (fr) 2004-07-22

Family

ID=32519491

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2003/001959 Ceased WO2004062067A1 (fr) 2002-12-27 2003-06-12 Machine electrique

Country Status (2)

Country Link
DE (1) DE10261617A1 (fr)
WO (1) WO2004062067A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008017616A1 (fr) * 2006-08-07 2008-02-14 Robert Bosch Gmbh Moteur électrique
CN104218716A (zh) * 2013-05-30 2014-12-17 通用汽车环球科技运作有限责任公司 电动机组件和方法
WO2018091318A1 (fr) * 2016-11-17 2018-05-24 Robert Bosch Gmbh Stator d'une machine électrique, machine électrique, et son procédé de fabrication
CN108702037A (zh) * 2016-02-16 2018-10-23 株式会社安川电机 旋转电机和旋转电机的制造方法
EP3493369A1 (fr) * 2017-11-29 2019-06-05 Siemens Aktiengesellschaft Dispositif de maintien d'un stator dans un boîtier au moyen d'éléments de ressort

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7982356B2 (en) 2006-06-02 2011-07-19 Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg Electric motor and method for manufacturing an electric motor for a motor vehicle actuator drive
DE102007058072A1 (de) 2007-12-03 2009-06-04 Robert Bosch Gmbh Elektrische Maschine
US7847444B2 (en) * 2008-02-26 2010-12-07 Gm Global Technology Operations, Inc. Electric motor assembly with stator mounted in vehicle powertrain housing and method
DE102010028989A1 (de) 2010-05-14 2011-11-17 Robert Bosch Gmbh Verfahren zur Herstellung eines Elektromotors
DE102011103853B4 (de) * 2010-06-18 2021-01-14 Sew-Eurodrive Gmbh & Co Kg Elektromotor und Verfahren zum Herstellen eines Elektromotors
JP5263368B2 (ja) * 2011-03-08 2013-08-14 株式会社豊田自動織機 電動圧縮機、及び電動圧縮機の組付方法
DE102012022481A1 (de) * 2012-11-19 2014-05-22 Sew-Eurodrive Gmbh & Co Kg Elektromotor mit einem Stator
DE102014100842B4 (de) 2014-01-24 2018-03-15 Ebm-Papst St. Georgen Gmbh & Co. Kg Elektrische Innenläufermaschine sowie Montageverfahren
EP3073612B1 (fr) * 2015-03-26 2019-10-09 Skf Magnetic Mechatronics Ensemble stator et palier magnétique ou moteur électrique comportant un tel ensemble stator
CN106787493A (zh) * 2016-12-26 2017-05-31 哈尔滨工业大学 一种空间设备用分装式永磁电机的无机壳装配方法
CN108565999B (zh) * 2018-01-03 2019-11-12 珠海格力电器股份有限公司 电机组件及具有其的压缩机
DE102018205785A1 (de) * 2018-04-17 2019-10-17 Siemens Aktiengesellschaft Elektrische Maschine mit zumindest einem Federelement zum Halten eines Stators an einem Gehäuse sowie dazugehöriges Herstellungsverfahren
DE102023200955A1 (de) 2023-02-07 2024-08-08 Robert Bosch Gesellschaft mit beschränkter Haftung Isoliermaske und ein Stator einer elektrischen Maschine, eine elektrische Maschine, sowie Verfahren zum Herstellen einer solchen

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0819205A (ja) * 1994-06-29 1996-01-19 Fuji Electric Co Ltd 回転電機の固定子
EP0957564A2 (fr) * 1998-05-02 1999-11-17 Normalair-Garrett (Holdings) Limited Combinaison d'un dispositif de stator et de rotor
WO2001078213A1 (fr) * 2000-04-12 2001-10-18 Robert Bosch Gmbh Moteur electrique

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE628541C (de) * 1936-04-06 Emil Skrabal Befestigung der Lagerschilde an Elektromotoren mit Gehaeusemantel
DE1973001U (de) * 1967-08-19 1967-11-23 Elek Sche Geraete M B H Ges Befestigung der stator-blechpakete im motorgehaeuse.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0819205A (ja) * 1994-06-29 1996-01-19 Fuji Electric Co Ltd 回転電機の固定子
EP0957564A2 (fr) * 1998-05-02 1999-11-17 Normalair-Garrett (Holdings) Limited Combinaison d'un dispositif de stator et de rotor
WO2001078213A1 (fr) * 2000-04-12 2001-10-18 Robert Bosch Gmbh Moteur electrique

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 05 31 May 1996 (1996-05-31) *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008017616A1 (fr) * 2006-08-07 2008-02-14 Robert Bosch Gmbh Moteur électrique
CN104218716A (zh) * 2013-05-30 2014-12-17 通用汽车环球科技运作有限责任公司 电动机组件和方法
US9583983B2 (en) 2013-05-30 2017-02-28 GM Global Technology Operations LLC Electric motor assembly and method
CN108702037A (zh) * 2016-02-16 2018-10-23 株式会社安川电机 旋转电机和旋转电机的制造方法
WO2018091318A1 (fr) * 2016-11-17 2018-05-24 Robert Bosch Gmbh Stator d'une machine électrique, machine électrique, et son procédé de fabrication
US11070104B2 (en) 2016-11-17 2021-07-20 Robert Bosch Gmbh Stator of an electrical machine, an electrical machine, and method for producing same
EP3493369A1 (fr) * 2017-11-29 2019-06-05 Siemens Aktiengesellschaft Dispositif de maintien d'un stator dans un boîtier au moyen d'éléments de ressort
WO2019105751A1 (fr) 2017-11-29 2019-06-06 Siemens Aktiengesellschaft Support de stator dans le carter par le biais d'éléments élastiques
US11705765B2 (en) 2017-11-29 2023-07-18 Siemens Aktiengesellschaft Mounting a stator in a housing using spring elements

Also Published As

Publication number Publication date
DE10261617A1 (de) 2004-07-22

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