EP1563583A1 - Stator pour une machine electrique - Google Patents

Stator pour une machine electrique

Info

Publication number
EP1563583A1
EP1563583A1 EP03750365A EP03750365A EP1563583A1 EP 1563583 A1 EP1563583 A1 EP 1563583A1 EP 03750365 A EP03750365 A EP 03750365A EP 03750365 A EP03750365 A EP 03750365A EP 1563583 A1 EP1563583 A1 EP 1563583A1
Authority
EP
European Patent Office
Prior art keywords
stator
lamella
stand
plate
lamellae
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
EP03750365A
Other languages
German (de)
English (en)
Inventor
Wolfgang Harrer
Eberhard Rau
Thomas Berger
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 EP1563583A1 publication Critical patent/EP1563583A1/fr
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
    • H02K1/16—Stator cores with slots for windings
    • 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
    • H02K1/14—Stator cores with salient poles
    • H02K1/141—Stator cores with salient poles consisting of C-shaped cores
    • 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
    • H02K1/14—Stator cores with salient poles
    • H02K1/145—Stator cores with salient poles having an annular coil, e.g. of the claw-pole type
    • 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
    • H02K3/18—Windings for salient poles
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49009—Dynamoelectric machine

Definitions

  • stator core which thus has teeth and grooves which are customary and parallel to one another for a stator.
  • a pre-wound core winding is approximately flat and is then inserted into the grooves of the essentially flat core.
  • the assembly of core and core winding is then bent round so that a conventional hollow cylindrical stand is created. After the assembly of the stator iron and winding has been bent round, the two ends are connected to one another.
  • an end lamella to at least one end face of the stator core, which has a higher rigidity than other lamellas referred to as main lamellae. Spreading of the stand in the area of the stand teeth is avoided.
  • the stand according to the invention with the features of the main claim has the advantage that a selection is made with the specified strength for a first stand plate lamella, in which the energetic losses are of a magnitude which is still electromagnetically sensible. If the stator laminations have a thickness that does not exceed 4 mm, with high stator winding currents the eddy currents within a laminate are within an acceptable range. If the stator plate lamella were thicker than 4 mm, the eddy currents within this one lamella would be so great that the efficiency of the entire electrical machine would decrease. In addition, the eddy currents induced in the first stator sheet metal lamella generated a large heat loss energy, which would lead to an asymmetrical radial expansion of the stator core. This would have the consequence that the stator housing close to the at least one strong stator plate lamella would not only be loaded axially by the stator clamping forces, but also by the radial one
  • the first stator plate lamella which is stronger than the second stator plate lamellae, should also have a minimum thickness of 0.8 mm. As desired, this minimum thickness means that a fanning out of the stator core, which will later be curved, is largely avoided on its radial inside (teeth). A particularly favorable thickness of the first stator laminate is given if the thickness in the axial direction of the stator core is between 1.0 and 2.0 mm.
  • the thickness of the second stator lamellae is between 0.3 mm and 0.7 mm.
  • yoke height of the stator core Another factor influencing the fanning out of the radially inward teeth is the so-called yoke height of the stator core.
  • the magnetic flux through the yoke of the stator core should not have too great a resistance, so that overall a yoke height between 3 mm and 7 mm is provided.
  • the cheapest measuring range for the yoke height is between 3.5 mm and 4.3 mm.
  • the first stator plate lamella which is designed or arranged as an end lamella, has a different lamella contour that deviates from the contour of the second stator plate lamella.
  • At least one first stator plate lamella is a lamella between two end lamellae. This has the advantage that a symmetrical stiffening of the stator core is achieved with a single first stator sheet metal lamella.
  • At least one end plate is a first stator plate plate.
  • This also includes, for example, the variant according to which both the end lamella and a stator plate lamella following thereafter are a first stator plate lamella.
  • the stiffness of the stator core is further increased and, on the other hand, the effort required to produce the end lamellae is reduced if the stiffness increases further. If you compare a stator plate lamella with two stator plate lamellae, which ultimately have the same thickness as the one stator plate lamella, then the manufacturing effort for the thinner stator plate lamellae is lower.
  • Stator plate lamellae are of poor quality compared to the two thin stator plate lamellae.
  • stator core constructed in such a way that, for example, there is a first stator plate lamella in an axial center and at one axial end.
  • the stand core can be packaged from two identical half-stand cores. This is easier to automate compared to a version with a single first stator plate lamella in the center of the stator core.
  • an electrical machine in particular a three-phase generator for a motor vehicle, is designed with a stand according to one of the preceding exemplary embodiments.
  • FIG. 1 a shows a laminated stator core according to a first exemplary embodiment
  • FIG. 1b shows an enlarged detailed view of the first exemplary embodiment
  • FIG. 2a shows a cross section through a stator iron, all the slats having the same thickness
  • FIG. 2b shows a detailed view of a stand iron with a stronger end lamella
  • FIG. 3 shows a diagram which shows the relationship between axial expansion, yoke height and the thickness of a first stator plate lamella
  • FIG. 4 shows a side view of a stator core with a modified contoured end lamella
  • FIG. 5a, 5b and 6 different cross sections through a stator core according to others
  • FIGS. 7a, 7b, 8 and 9a further exemplary embodiments of a stator core
  • Figure 9b the interaction of a housing part with a stator core according to the
  • FIG. 10 shows a stator core in accordance with one of the exemplary embodiments made of layered stator laminations with a stator winding
  • Figure 11 shows a stand for an electrical machine, which by bending the in Figure
  • Figure 12 symbolically an electrical machine with a stand according to the invention.
  • FIG. 1 a shows a stator core 10 made of stator laminations 11 arranged in layers.
  • the stator laminations 11 are arranged such that 12 teeth 13 and grooves 14 extend on one side. These teeth 13 later serve in a stator to capture the electromagnetic field emanating from a rotor and thereby to induce an electrical voltage in a stator winding arranged in the slots 14.
  • This side 12 is directed radially inward after the round bending of an assembly of stator core 10 and stator winding.
  • the stator core 10 also has a rear side 15 which is later directed radially outward.
  • the back 15 is also profiled and has back teeth 16, between which back grooves 17 run.
  • the teeth 13 and the back teeth 16 are integrally connected by means of a yoke 18.
  • the layered stator laminations 11 determine a layer direction which corresponds to an axial direction a.
  • the axial direction later corresponds to an axis of rotation of the rotor in the electrical machine.
  • the stator core 10 is layered from at least two different stator laminations 11.
  • a first stator sheet metal lamella 20 is arranged on a respective end face of the stator core 10.
  • Second stator lamellae 21 are arranged between these two first stator lamellae 20.
  • the first stator laminations 20 have a greater bending resistance than the second
  • a stator core 10 is also provided, which is constructed on the one hand from second stator sheet metal laminations 21 and on the other hand has at least one first stator sheet metal lamella 20 on one end face.
  • FIG. 1b shows a cross section through a stator core 10 through the yoke 18 at the position of a groove 14.
  • This stator core 10 consists of stator laminations 11 which correspond in their thickness d LH to a second stator laminate 21, for example with a material thickness of 0.5 mm ,
  • the yoke 18 has a yoke height H r, for example 4 mm.
  • stator sheet metal lamella 11 is expanded due to the strong curvature of the yoke 18, which already begins with the neutral fiber in the yoke and is particularly noticeable in the end region of the teeth 13 makes.
  • This spread 23 is specified here as elongation ⁇ B , the elongation ⁇ B being dependent on the original width B 0 of the stator core 10 and the end width of the B, the stator core 10 after the bend.
  • the formulaic connection is:
  • the elongation ⁇ B depends, among other things, on the yoke height H j and the thickness d LE of a first stator plate lamella 20 used.
  • Another influencing variable is the material thickness d LH used for the second stator plate lamella 21 used shown in Figure 2b.
  • FIG. 3 shows in a diagram the effect of a used first stator sheet metal lamella 20 with a certain material thickness d LE on the achieved elongation ⁇ B as a function of different yoke heights H ..
  • the relationships were determined as a function of the second stator sheet metal lamellae 21
  • the first stator sheet metal lamellae 20 should have a thickness d LE in the axial direction that does not exceed 4 mm. Furthermore, it is provided that the at least one first stator plate lamella 20 has a thickness d in the axial direction, which is at least 0.8 mm. Furthermore, it is preferred that the at least one first stator sheet metal lamella 20 has a thickness d LE in the axial direction, which is between 1.0 and 2.0 mm in each case. With justifiable expenditure for the production of such a first stator plate lamella 20, very good results are already achieved for limiting the expansion ⁇ B. Due to additional
  • Yoke height H should be between 3.5 mm and 4.3 mm.
  • FIG. 4 shows a partial side view of the stator core 10.
  • This further exemplary embodiment shows, on the one hand, second stator plate lamellae 21, which are formed by at least one first stator plate lamella 20 at one axial end of the stator core 10.
  • This first stator plate lamella 20 has a different contour 25 than the second stator plate lamellae 21.
  • the teeth 13 are narrower than the teeth 13 of the second stator sheet metal lamellae 21.
  • the teeth 13 of the second stator sheet metal lamellae 21 have, for example, a pronounced tooth head 27 which protrudes toward adjacent grooves 14
  • Toothed strips 28 has.
  • the first stator laminate 20 does not have such toothed strips.
  • the yoke height H J20 of the first stator plate lamellae 20 can be smaller than the yoke height H J 2] of the second stator plate lamellae 21. If one looks at a cross section through a tooth 13 of the first stator plate lamella 20, one can see the rounded edges of the teeth 13 towards the grooves 14
  • Rounding of the edges can have already taken place, for example, during punching by means of the so-called punch feed. Likewise, a corresponding rounding of the edges can be carried out on the back teeth 16.
  • FIG. 5a shows a further variant for a stator core 10.
  • the stator core 10 has, in addition to the second stator plate lamellae 21, at least one first stator plate lamella 20, which have a greater thickness than the second stator plate lamellae 21.
  • the first stator sheet metal lamella 20 has a shoulder 30 on its outer circumference which extends all around. This paragraph 30 serves as a seat in a housing of the electrical machine. It is achieved in that between the right front side of the
  • Stator core 10 and the end face of paragraph 30 reaches a certain axial length which is important for the quality of the clamping action between two housing halves.
  • This paragraph 30 is incorporated, for example, by turning.
  • the exemplary embodiment according to FIG. 5b shows a first stator plate lamella 20 on each of the two axial end faces of the stator core 10, which receive second stator plate lamellae 21 between them.
  • a paragraph 30 is exempted in each first stator sheet metal lamella 20. If not necessary, a paragraph 30 can be dispensed with, for example.
  • FIG. 6 shows an end view of a further variant of a stator core 10. Starting from a first stack, formed from the second
  • Stator plate lamellae 21 which initially does not include the first stator plate lamella 20, a width B 20 is measured.
  • a selected first stator lamella le 20 is stacked on this first stack with the width B 20 within a certain tolerance.
  • This first stator lamination 20 has a width B 30 20 B a ideal width corresponding to the width B is 30, so that the desired width B results in 40 of the total stack.
  • B 40 also has a tolerance. If, however, the stack of second stator lamellae 21 has a width other than B, 0 , for example a smaller width than the width B, 0 , one with a width B 3 that is greater than the width B is selected for the first stator lamella 20 to be stacked 30 is. Likewise in the reverse case, when the stack of the second stator laminations 21 is a larger one
  • a first stator sheet metal lamella 20 is then selected here, which has a width B 3 smaller than B 30 .
  • the aim of this measure is to obtain an entire stack of second stator sheet metal lamellae 21 and at least one first stator sheet metal lamella 20, which has a nominal width B 40 with a technically permissible tolerance position. This enables the production of a stator core or
  • Stand sheet metal package in which a high accuracy of fit can be achieved at an early stage of manufacture; a further mechanical processing, for example turning, d. H. Machining the stator core to the required axial length is not necessary.
  • FIG. 7a A further exemplary embodiment of a stator core 10 is shown in detail in FIG. 7a.
  • This embodiment carries at its axial ends two first stator laminations 20, which receive second stator laminations 21 between them.
  • FIG. 7b shows this state of affairs in a front view, a shoulder 30 being additionally worked into the outermost first stator plate lamella 20.
  • a further exemplary embodiment of a stator core 10 is shown in FIG.
  • first stator lamellae 20 accommodate a certain number of second stator lamellae 21 between them.
  • the first stator lamellae 20 are each axially axially formed by a second stator lamella 21 that forms an end lamella
  • End face always ended in the material of a slat.
  • the end plate is a first stator plate plate 20 with a different thickness d LE .
  • two first stator plate lamellae 20 are arranged in an axial center of the stator core 10 in order to increase the rigidity of the stator core 10.
  • only a middle first stator plate lamella 20 can also be provided.
  • FIG. 9b shows a section of the transition point between a stator core 10 or a stator 40, that is to say a stator core 10 which has already been bent with a stator winding inserted before the round bending. It can be clearly seen how the shoulder 30 encompasses a shoulder 42 on the housing 43.
  • a stator core 10 according to one of the previously described exemplary embodiments is provided with a stator winding 45.
  • the stator winding 45 is shown symbolically in the form of circles representing coil sides.
  • This stator winding preferably has a three-phase winding and is inserted with its coil sides into the slots 14 of the stator core 10. As shown in FIG. 10, this can be done, for example, with a flat stator core 10, but also with a non-flat stator core 10, for example stretched over the back 15 in such a way that the grooves 14 additionally open. An extended position of the stator core 10 is not necessary in order to insert the stator winding 45 into it.
  • stator winding 45 is then bent round so that the slots 14 close show a common center, FIG. 11.
  • assembly 50 is connected to one another in the round curved state on the two abutting end faces of the stator core 10. For example, this can be done by welding at this point, so that there is a weld seam 52 there.
  • FIG. 12 shows a symbolic representation of an electrical machine 55 which has a housing and a stand 40.
  • a stator 40 is provided for an electrical machine 55, this stator 40 having a stator winding 45 which changes from one into one
  • the stator core 10 has grooves 14 and teeth 13 on its radially inwardly oriented circumference. It consists of layered stator laminations 11, the layer direction of which determines an axial direction a. At least one first stator plate lamella 20 has a greater bending resistance than second stator plate lamellae 21. It is provided that at least one first stator plate lamella 20 has a thickness d LE in the axial direction a that does not exceed 4 mm. Furthermore, it is provided that the at least one first stator plate lamella 20 has a thickness d LE in the axial direction that is at least 0.8 mm.
  • the at least one first stator plate lamella 20 has a thickness d LE in the axial direction a, which is between 1.0 and 2.0 mm in each case. It has furthermore proven to be favorable that the thickness d LH of the second stator plate laminations 21 is between 0.3 and 0.7 mm inclusive. In addition, a yoke height H. which is between 3 mm and 7 mm is preferred. Compared to this first approximation, it has proven to be particularly advantageous that the stator core 10 has a yoke height H. which is between 3.5 mm and 4.3 mm.
  • the at least one first stator plate lamella 20 is an end lamella and is consequently located at an axial end of a stator core 10.
  • the at least one end lamella has a different lamella contour than the second stator lamination 21. This applies, for example, when the end plate is designed as a first stator plate plate 20. However, this is not restricted and can also be applied, for example, to second stator laminations 21. If at least one first stator plate lamella 20 is arranged within the stator core 10, a position in the axial center of the stator core 10 is preferred.
  • the axial width or the material thickness of the at least one first stator lamination 20 does not exceed the axial width of the stator core 10 by more than 10%. If the stator core 10 is axially 40 mm wide, the material thickness of the at least one first stator plate lamella 20 should not be wider than 4 mm. In a second approximation, a maximum width of 5% of the at least one first stator plate lamella 20 is provided, so that the material thickness of the at least one first stator plate lamella 20 should not be wider than 2 mm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Synchronous Machinery (AREA)

Abstract

L'invention concerne un stator pour une machine électrique présentant un enroulement statorique (45) maintenu par un noyau statorique (10) de forme toroïdale. Ce noyau statorique (10) comporte des rainures (14) et des dents (13) sur sa périphérie orientée radialement vers l'intérieur. Ce noyau statorique (10) est composé de lamelles de tôle statoriques (11) disposées en couches, le sens des couches déterminant un sens axial (a). Selon la présente invention, au moins une première lamelle de tôle statorique (20) présente une résistance à la flexion supérieure à celle de secondes lamelles de tôle statoriques (21), ladite première lamelle de tôle statorique (20) présentant une épaisseur (dLE) en sens axial (a) n'excédant pas 4 mm.
EP03750365A 2002-09-30 2003-09-22 Stator pour une machine electrique Ceased EP1563583A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10245691A DE10245691A1 (de) 2002-09-30 2002-09-30 Ständer für eine elektrische Maschine
DE10245691 2002-09-30
PCT/DE2003/003136 WO2004032307A1 (fr) 2002-09-30 2003-09-22 Stator pour une machine electrique

Publications (1)

Publication Number Publication Date
EP1563583A1 true EP1563583A1 (fr) 2005-08-17

Family

ID=31984312

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03750365A Ceased EP1563583A1 (fr) 2002-09-30 2003-09-22 Stator pour une machine electrique

Country Status (7)

Country Link
US (1) US7282830B2 (fr)
EP (1) EP1563583A1 (fr)
JP (1) JP2006501796A (fr)
KR (1) KR101017852B1 (fr)
CN (2) CN101232209B (fr)
DE (1) DE10245691A1 (fr)
WO (1) WO2004032307A1 (fr)

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DE10361857A1 (de) * 2003-12-30 2005-07-28 Robert Bosch Gmbh Verfahren zur Herstellung eines Ständers sowie danach hergestellter Ständer
DE102005037464A1 (de) * 2005-08-09 2007-02-15 Robert Bosch Gmbh Stator einer elektrischen Maschine und elektrische Maschine
KR20080000172A (ko) * 2006-06-26 2008-01-02 엘지전자 주식회사 스테이터 코어
DE102006034109A1 (de) * 2006-07-24 2008-01-31 Robert Bosch Gmbh Radiale Zentrierfläche eines Ständekerns
JP2008125243A (ja) 2006-11-13 2008-05-29 Mitsubishi Electric Corp 回転電機
NL1035273C2 (nl) * 2008-04-09 2009-10-12 P3W Invest B V Stator-element en schuifdeur voorzien daarvan, en een werkwijze voor het verschuiven van een element zoals een deur.
JP5108795B2 (ja) * 2009-01-15 2012-12-26 パナソニック株式会社 振動型リニアアクチュエータ
US9564791B2 (en) * 2010-12-01 2017-02-07 Robert Bosch Gmbh Method for producing a stator winding of an electric machine, in particular for producing an AC generator
CN102097905A (zh) * 2011-03-18 2011-06-15 刘荣坤 一种多功能电机
US9099897B2 (en) 2011-09-13 2015-08-04 L.H. Carbide Corporation Method for connecting end sections of an annular laminated article and articles made therefrom
US9467010B2 (en) 2011-11-17 2016-10-11 Remy Technologies, L.L.C. Method of winding a stator core with a continuous conductor having a rectangular cross-section and a stator core
US8745847B2 (en) 2011-11-17 2014-06-10 Remy Technologies, L.L.C. Method of P-forming a continuous conductor having a rectangular cross section and a stator including a stator winding formed from a P-formed conductor having a rectangular cross-section
US8789259B2 (en) 2011-11-17 2014-07-29 Remy Technologies, L.L.C. Method of winding a stator core with a continuous conductor having a rectangular cross-section and a stator core
US20140210300A1 (en) * 2013-01-30 2014-07-31 Victory Industrial Corporation Stator of an Alternator
US20140210301A1 (en) * 2013-01-30 2014-07-31 Victory Industrial Corporation Stator of an Alternator
DE102013222643A1 (de) * 2013-11-07 2015-05-07 Robert Bosch Gmbh Flachpaket zur Herstellung eines Stators
DE102014206847A1 (de) * 2014-04-09 2015-10-15 Zf Friedrichshafen Ag Stator einer rotierenden elektrischen Maschine
DE102014111239B4 (de) * 2014-08-07 2016-07-21 Schuler Pressen Gmbh Blechpaket eines Stators oder eines Läufers sowie eine elektrische Maschine
WO2018138866A1 (fr) * 2017-01-27 2018-08-02 三菱電機株式会社 Stator, moteur électrique, compresseur et dispositif de réfrigération/climatisation
CN118117841A (zh) * 2024-04-28 2024-05-31 比亚迪股份有限公司 悬浮电机、悬架系统及车辆

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Also Published As

Publication number Publication date
KR101017852B1 (ko) 2011-03-04
US20050067911A1 (en) 2005-03-31
KR20050046813A (ko) 2005-05-18
CN100364210C (zh) 2008-01-23
DE10245691A1 (de) 2004-04-08
CN101232209B (zh) 2011-01-26
CN1650498A (zh) 2005-08-03
WO2004032307A1 (fr) 2004-04-15
JP2006501796A (ja) 2006-01-12
US7282830B2 (en) 2007-10-16
CN101232209A (zh) 2008-07-30

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