DE102014206847A1 - Stator of a rotating electrical machine - Google Patents

Abstract

A stator (14) of a rotating electrical machine (10) is described, which comprises an annular laminated core (16) with a yoke (18) and teeth (20) projecting radially therefrom. The laminated core (16) is formed from a plurality of axially stacked core lamellae (36) each of which has a core yoke portion (36a) extending circumferentially on the stator (14) and a core tooth portion (36b) radially projecting therefrom. Next, the laminated core (16) at least on one of the end faces at least one end plate (34). Such an end plate (34) has at least one Endjochbereich (34a) and is designed with a different from the core lamellae (36) outer contour. It is proposed to shorten the end plate (34) with respect to the radial extension direction of a core plate (36).

Description

The present invention relates to a stator of a rotary electric machine according to the preamble of claim 1.

According to a known and conventional construction, the stator of an electric machine comprises a laminated core made of magnetizable electric sheet metal. To avoid eddy current losses, such a laminated core is formed from a plurality of axially staggered laminations, which are interconnected, for example, either with a baked enamel or interlocking punching packet nubs. The laminated stator core can be arranged by means of a press fit on a cylindrical stator carrier. To secure the axial position, such a laminated core can be additionally set between two stops of a stator. One of the stops can usually be provided by an annular shoulder on the carrier element, while the second axial stop is produced only after the arrangement of the laminated core on the carrier element, for example by caulking. With such a caulking process itself and also during operation of the electric machine, the pass ratios may change under the influence of a temperature change, with the result that in particular the end-side regions of a winding-carrying laminated core fan out axially, lamellae occasionally protrude from the laminated core and in the radial direction in one defined air gap between the rotor and stator can dive. This adversely affects the efficiency of such an electric machine.

From the EP 1 496 596 A1 is a segmented stator of an electric machine has become known, the end-side end plates are narrower in the tooth portion of the laminated core or a segment in the circumferential direction. In this way, arranged on winding bodies coil winding can be performed with a permissible bending radius for the coil wire, with a given axial length, a high efficiency of the electric machine can be achieved.

The EP 1 517 426 B1 describes a similar solution with narrower in the circumferential direction end plates on the tooth region of a laminated core, with two end face attached to a tooth wound body flush with the pointing in the circumferential direction tooth flanks.

Still further to the aforementioned basically similar solutions go from the WO 2012/089404 A2 and the DE 10 2011 078 513 A1 out.

The present invention is based on the described background, the object to represent a stator of the type described with a laminated laminated core without it comes to a determination on a support element to a fanning and displacement of individual slats.

This object is achieved by a stator according to claim 1.

Advantageous embodiments and further developments of the invention will become apparent from the dependent claims.

Accordingly, the invention proposes a generic stator of a rotating electrical machine, in which an end-side end plate of the laminated core is shortened relative to the radial extent direction of a core plate.

The solution also includes a package or stack of end laminations, for example 2-5 or more end laminations. The at least one end plate has due to the shortening a smaller cross-section than the core lamellae and can also be punched in the manufacture of the core lamella with and also be packaged with. The core lamellae and / or the end lamellae can advantageously be connected to one another by a stamped packetization. Furthermore, it can also be provided to connect a core lamella and an end lamella to one another by means of a stamped packetization, so that a one-piece and compact laminated core of the core lamellae and at least one end lamella is formed by this connection technique.

The advantage of the design of the end plate proposed here is that in the determination of the laminated core to a support element using an axial strain or by means of a press fit, the end plate is slightly displaced by a mounting portion in the direction of extension of a tooth, ie in the radial direction, without that the end plate dips into a radial air gap to a rotor of the electric machine. The end plate can thus shift without adverse effect on the efficiency of an electric machine by the amount of radial shortening in this direction. The core lamellae and the end lamella are stacked so that the shortening of the end lamella acts especially at the free radial end of a tooth.

It can advantageously be provided that a core yoke region and the end yoke region have, at least in sections, a common contact contour on the radial side opposite the core tooth regions, and that these Investment contour one, in particular radially inner or radially outer cylindrical mounting portion of the yoke for fixing to a support member forms. This means that the core lamellae and the end lamella are congruent in the area of the contact contour. This can be achieved in the stacking of the individual slats easy centering of the end plate to the core lamellae.

With further advantage, the end plate may have an end tooth region projecting radially from the end yoke region, which end section is tapered in the circumferential direction of the stator with respect to a core tooth region. Several core tooth regions form a stator tooth together with the end tooth region. In the presence of a winding arranged on the stator teeth, the end lamella thus also contributes to the generation of a magnetic flux in addition to the core lamellae. Furthermore, both the core lamellae and the end lamella can have a tooth tip for achieving a desired magnetic flux. A favorable variant provides differently in that the core lamellae have a tooth tip region and the end lamella is designed without a tooth head.

As part of a particular variant, the annular laminated core can be performed segmented and thereby have a plurality of stator in the circumferential direction, each having two circumferentially adjacent stator segments mutually complementary joining contours. This design allows a manufacturing advantage, since the stator segments can be provided with a winding already before their assembly. At the same time the material costs are reduced when punching the slats and the base material better utilized. The Endjochbereich the Endlamelle may conveniently have the joining contours, so that the end plate is formed annular segmented.

With further advantage, the laminated core can carry a coil winding, which is fixed by means of a winding arranged at least on the end side of a toothed body on this. Usually winding bodies or winding body halves are arranged on both end faces of the laminated core, which carry a coil winding and insulate them from a stator tooth. By acting on winding winding the coil with each bobbin is pressed against the tooth and held there. As a result, the end plate is pressed axially against the core lamellae and preserved in this area from fanning.

According to a favorable variant, a winding body for arrangement on the laminated core has at least one retaining projection which axially covers the end blade or which axially engages through the end blade. Thus, the winding body can be supported with the retaining projection on a core lamella. Furthermore, a gap, in particular a radial gap is provided between the end plate and the retaining projection. Likewise, a gap can be further formed in the circumferential direction. This arrangement makes it possible for the end plate located there to displace to a certain extent during assembly of the laminated core or due to operational reasons, for example as a result of a temperature change, without at the same time influencing the position on the coil arranged coil.

According to a development of the invention, it is provided to form on the laminated core a recess extending in the axial direction into which the winding body can engage with an axial extension with respect to the stator and center there.

When assembling a laminated core to a carrier element to achieve a tight fit of the joining partners act very large forces, which must be supported by these. To avoid material damage and to facilitate assembly, the laminated core on the yoke at the level of a tooth may have an approximately radially extending and axially traversing slot, which may optionally be performed several times on the handling of the laminated core. Such a slot may coincide with the aforementioned recess or pass into it. A part of the forces acting on the joining can be absorbed in this way by a deformation of the laminated core in the region of the slot, for example by means of an elastic tension.

The winding body can be designed with its support region so that it encloses the tooth side on the laminated core an end plate. This means that the end tooth region and optionally also the end yoke sections located on this radial side of the laminated core are enclosed.

Furthermore, as already mentioned, the yoke of the laminated core can be fixed to the fastening section on a cylindrical receiving section of a carrier element. In this case, for the axial fixing of the laminated core, the support element have two stops, between which the laminated core is braced axially frictionally. In this case, the laminated core can advantageously be fixed to the end plate by means of a Verstemmbereichs or more circumferentially distributed Verstemmbereiche on the support element. On the use of an additional support member, in particular support ring can thus be dispensed with.

The laminated core is with its cylindrical mounting portion on an equally cylindrical receiving portion of the support member rotatably arranged, for which purpose preferably a press fit or an interference fit of the parts is realized. This or this can be done either by means of a longitudinal compression bandage by axial press joining, by means of a transverse compression bandage by shrinking or by a mixed form of the aforementioned press dressings by the two connection partners are heated to different temperatures before joining.

When joining the connection partners, the laminated core is pushed axially onto the support member until it comes to a first stop to the plant.

Preferably, a caulking region can be carried out on the carrier element, of which an end yoke region of the end plate of the laminated core is at least partially radially covered. The other axial stop can be easily formed by an annular shoulder on the receiving area of the support element. According to one embodiment, the carrier element has a different thermal expansion coefficient with respect to the laminated core. In particular, the carrier element can be made of an aluminum material, while the laminated core is essentially made of a ferrous material with alloy components.

• – Bereitstellen eines ringförmigen Stator-Blechpakets aus einer Vielzahl von Kernlamellen und zumindest einer stirnseitigen, radial gegenüber einer Kernlamelle in Erstreckungsrichtung eines Zahns verkürzten Endlamelle, wobei das Blechpaket optional aus einer Mehrzahl von Umfangssegmenten zusammengesetzt ist, und eine Statorwicklung aufweist, welche mit stirnseitig an den Zähnen angeordneten Wickelkörpern ausgeführt ist,
• – Beaufschlagung des Blechpakets mit einer axialen kraftschlüssigen Verspannung mittels eines Montagewerkzeugs,
• – Axiales Fügen des Blechpakets mit einem Trägerelement bis zur Anlage des Blechpakets an einem ersten axialen Anschlag des Trägerelements unter Beibehaltung der kraftschlüssigen Verspannung, wobei optional ein Pressverband zwischen den Fügepartnern ausgebildet wird,
• – Erzeugen eines zweiten axialen Anschlags durch zumindest einen Verstemmbereich mittels einer Verstemmung des Trägerelements, wobei der Verstemmbereich bzw. die Verstemmbereiche einen Endjochbereich der Endlamelle zumindest teilweise radial überdecken.
• – Lösen des Montagewerkzeugs.

A method of manufacturing a stator of an electric machine may include the steps of:

• - Providing an annular stator laminated core of a plurality of core plates and at least one end, radially opposite a core plate in the direction of extension of a tooth shortened end plate, wherein the laminated core is optionally composed of a plurality of circumferential segments, and having a stator winding, which with the end face of the Teeth arranged arranged winding bodies,
• - Actuation of the laminated core with an axial non-positive clamping by means of a mounting tool,
• Axial joining of the lamination stack with a carrier element until the lamination packet abuts against a first axial stop of the carrier element while retaining the frictional clamping, optionally forming an interference fit between the joining partners.
• Producing a second axial stop by at least one caulking region by means of a caulking of the carrier element, the caulking region or caulking regions at least partially radially overlapping an end yoke region of the end disc.
• - Release the assembly tool.

To achieve a permanently high axial tension, the laminated core is already axially biased by means of an assembly aid mounted on the support element, this mounting aid is removed only after the generation of Verstemmbereiche.

A stator as described above can then be joined together with a rotatably mounted rotor about an axis A to form an electrical machine.

The invention will be explained by way of example with reference to embodiments shown in the figures.

Show it:

1 an electrical machine with a segmented stator, which is fixed by means of a caulking on a stator and at the stator segments by means of winding bodies, a coil winding is arranged and with a rotor,

2 an axial section of the with 1 illustrated electric machine,

3 a perspective view of a stator with a view of an end plate,

4 a perspective partial sectional view of a stator with a coil,

5 a perspective view of a stator with a view of a winding head of a stator coil arranged there,

6 Sectional views of a stator segment in the region of a winding head.

Identical objects, functional units or comparable components are denoted by the same reference numerals across the figures. Further, summary reference numbers are used for components and objects that occur multiple times in one embodiment or in one representation, but are described together in terms of one or more features. Components or objects which are described by the same or by the same reference numerals may be the same, but possibly also different, in terms of individual, several or all features, for example their dimensions, unless otherwise explicitly or implicitly stated in the description.

1 shows a rotating electric machine 10 in internal rotor design with a rotatable about an axis A rotor 12 and with one this surrounding stator 14 , The stator 14 includes an annular laminated core 16 with a yoke 18 and having radially outwardly projecting teeth 20 , in the 1 however are not visible. In the present case is the annular laminated core 16 segmented running and has several stator segments in the circumferential direction 22 with one tooth each 20 and a yoke section 22a on which is especially good in 3 are recognizable. At the yoke section 22a are in the circumferential direction in each case two complementary joining contours 22c , D formed, by means of which in each case two adjacent stator on the circumference 22 be joined together.

It is in the 1 . 2 to realize that the laminated core 16 a stator winding 24 in the form of individual coils 26 carries, in each case by means of two frontally at a tooth 20 arranged bobbins 28 . 30 is fixed there. Each of the winding bodies 28 . 30 has a radially on the laminated core 16 aligned and there adjacent base area 28a ; 30a and from this radially spaced and axially extending leg 28b , c; 30b , c on, each of which together form a winding space for receiving a winding wire.

The yoke composed into a ring 18 of the laminated core 16 is in the 1 . 2 by means of a press fit or a press fit with a radially outer cylindrical attachment portion 122 on a radially inner cylindrical receiving portion 32a one as a stator 32 formed carrier element 32 set with the aid of a machine torque. The carrier element 32 is made of an aluminum material and thus faces the laminated core 16 an approximately twice as large thermal expansion coefficient.

For axial fixing of the laminated core 16 are overlooking 2 on the carrier element 32 two attacks 32b , c provided between which the laminated core 16 axially clamped non-positively. A first stop 32b that when assembling laminated core 16 and carrier element 32 becomes effective, is by a receiving section 32 the carrier element 32 formed axially limiting annular shoulder. After joining, the laminated core 16 on the still free end face by means of a support element 32 trainee or trained Verstemmbereichs 32d or by means of several circumferentially distributed Verstemmbereiche 32d on the carrier element 32 established. This is the laminated core 16 in particular via a frontal or end side arranged on this lamella 34 or end lamella 34 held axially. In the present case is a package of several identically designed end plates 34 intended.

In 3 it can be seen that such an end plate 34 opposite to the remaining lamellae which are here as core lamellae 36 be designated, is formed at least with a different outer contour. Next is to secure the laminated core 16 by means of an in 2 as a stamp 37 schematically illustrated and axially acting in the direction of the arrow pressing tool at least one shaped as a radial overlap projection Verstemmbereich 32d generated, which the end-side end plate 34 of the laminated core 16 in the area of the yoke 18 that is at an end yoke area 34a at least partially covered radially. In 1 It can be seen that at the stator circumference a plurality of such Verstemmbereiche 32d are executed.

Alternatively, according to a variant not shown in the drawing, the caulking areas can also be performed on an annular support element which supports the laminated core with one end face and with the other end face by means of caulking in one on the stator 32 provided recess engages and is supported axially there. This variant proves to be useful in a carrier element made of steel, wherein the support member from a more easily plastically deformable material, for example, made of aluminum can be produced.

The laminated core 16 or a stator segment 22 includes a plurality of identical axially stacked core lamellae 36 , where a core lamella 36 one at the stator 14 circumferentially extending core yoke area 36a and a radially projecting core tooth region 36b having. As already stated, the laminated core 16 or a stator segment 22 at least one end fin on one of the end faces 34 with at least one end yoke area 34a on. In the present case are several end plates 34 with an identical geometry.

Related to the laminated core 16 form several core yoke areas 36a the core lamellae 36 with the at least one end yoke area 34a together the yoke 18 out. In other respects, the core lamellae 36 one core tooth area each 36b on, with all core tooth areas 36b together with one at the Endlamelle 34 provided end tooth area 34b at the yoke section 22a a tooth 20 or a stator tooth 20 form. Furthermore, the core lamellae 36 a tooth tip area 36c on, while present the end plates 34 are executed without a head.

It can be seen that the end plate 34 relative to the radial direction of extension of a core lamella 36 is executed shortened. Both with each other and with each other are the nuclear lamellae 36 and the end blades 34 connected by a stamped package, both at the core lamellae 36 as well as on the end blades 34 several stamped packet nubs 36d ; 34d are formed.

Out 5 it can be seen that the core yoke area 36a and the end yoke area 34a on the the core tooth area 36b opposite radial side at least partially a common investment contour 122 and that according to 1 . 2 a fixing section 122 of the yoke 18 for fixing to the support element 32 forms. The end tooth area 34b the end lamella 34 is radially from the Endjochbereich 36a from and is in the direction of the stator 14 opposite a core tooth area 36b tapered trained.

For arrangement on the laminated core 16 has the Endlamellenseitige bobbin 30 several retaining projections 30d , e, f on ( 6 ). The retaining projection 30d encloses the end lamellae 34 tooth side on the laminated core 16 and covers them axially, around a core lamella 36 support. Another, here central to the tooth area 36b arranged retaining projection 30e reaches through one in the end lamellae 34 provided opening 34e also to the outer nuclear lamella 36 support. In the area of the tooth base, the laminated core 16 a recess extending in the axial direction 16a on. The winding body 30 is based there with the retaining projection 30f at the core lamellae 36 from. From this retaining projection 30f Starting in the axial direction, an axial extension which has a smaller width or a smaller diameter extends 30g which axially into the core lamellae 36 engages and thereby simultaneously centering the bobbin 30 on the laminated core 16 he follows. The aforementioned recess 16a at the same time forms the end of a yoke 18 or at the yoke section 22a at the height of a tooth 20 approximately radially extending and axially traversing slot 16b , With this slot 16b can the laminated core 16 pick up and store a deformation force during assembly and when assembled.

In 6 It can also be seen that between the end plates 34 and the retaining projections 30d , e one gap each 38a , b, in particular a radial gap is formed. It is also recognizable in this context that at the end lamella 34 the recess 16a and the slot 16b are performed in the circumferential direction of the laminated core with the same width, while on a core blade 36 The slot 16b narrower in this direction than the recess 16a is trained ( 6 ). This allows the end lamellae 34 when caulking the laminated core 16 slightly shift radially inward without the bobbin 30 with the coil winding 26 be moved from their location.

• – Bereitstellen eines ringförmigen Stator-Blechpakets 16 aus einer Vielzahl von Kernlamellen 36 und zumindest einer stirnseitigen Endlamelle 34, wobei das Blechpaket 16 optional aus einer Mehrzahl von Stator- bzw. Statorsegmenten 22 zusammengesetzt ist, und eine Statorwicklung 24 aufweist, welche mit stirnseitig an den Zähnen 20 angeordneten Wickelkörpern 28, 30 ausgeführt ist,
• – Beaufschlagung des Blechpakets 16 mit einer axialen kraftschlüssigen Verspannung mittels eines Montagewerkzeugs,
• – Axiales Fügen des Blechpakets 16 mit einem Trägerelement 32 bis zur Anlage des Blechpakets 16 an einem ersten axialen Anschlag 32b des Trägerelements 32 unter Beibehaltung der kraftschlüssigen Verspannung, wobei optional ein Pressverband zwischen den Fügepartnern 16, 32 ausgebildet wird,
• – Erzeugen eines zweiten axialen Anschlags 32c durch zumindest einen Verstemmbereich 32d mittels einer Verstemmung des Trägerelements 32 oder eines am Trägerelement 32 eingesetzten Stützelements, wobei der Verstemmbereich 32d bzw. die Verstemmbereiche 32d einen Endjochbereich 34a der Endlamellen 34 zumindest teilweise radial überdecken.
• – Lösen des Montagewerkzeugs.

The stator described above 14 can be represented by a procedure with the following steps:

• - Providing an annular stator laminated core 16 from a variety of core lamellae 36 and at least one end-side end plate 34 , where the laminated core 16 optionally of a plurality of stator or stator segments 22 is composed, and a stator winding 24 having, which with frontally to the teeth 20 arranged bobbins 28 . 30 is executed,
• - Loading the laminated core 16 with an axial non-positive tension by means of a mounting tool,
• - Axial joining of the laminated core 16 with a carrier element 32 to the plant of the laminated core 16 at a first axial stop 32b the carrier element 32 while retaining the non-positive tension, optionally an interference fit between the joining partners 16 . 32 is trained
• - Generating a second axial stop 32c by at least one Verstemmbereich 32d by caulking the carrier element 32 or one on the carrier element 32 used support element, wherein the caulking 32d or the Verstemmbereiche 32d an end yoke area 34a the end blades 34 at least partially radially overlap.
• - Release the assembly tool.

As an assembly tool, a corresponding ferrule can be used whose axial abutment areas on the end faces of the laminated core 16 act and through which the laminated core 16 axially compressed and held together. Please note only that the attachment section 122 , So in this case the outer cylindrical surface of the laminated core 16 for mounting on the carrier 32 remains free and is not covered or otherwise seized.

LIST OF REFERENCE NUMBERS

10

electric machine

12

rotor

14

stator

16

laminated core

16a

recess

16b

slot

18

yoke

20

tooth

22

stator

22a

yoke

22c, d

joining contour

24

stator

26

Single coil

28

bobbin

28a

base region

28b, c

leg

30

bobbin

30a

base region

30b, c

leg

30d, e, f

 retaining projection

30g

axial extension

32

support element

32a

receiving portion

32b, c

attack

32d

caulking

34

end disk

34a

Endjochbereich

34b

Endzahnbereich

34d

Stanzpaketiernoppe

34e

opening

36

nuclear lamina

36a

Kernjochbereich

36b

Core tooth area

36c

Tooth head area

36d

Stanzpaketiernoppe

37

press tool

38a, b

gap

122

attachment section

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 1496596 A1 [0003]
• EP 1517426 B1 [0004]
• WO 2012/089404 A2 [0005]
• DE 102011078513 A1 [0005]

Claims (12)

Stator ( 14 ) of a rotating electrical machine ( 10 ), - an annular laminated core ( 16 ) with a yoke ( 18 ) and of which radially projecting teeth ( 20 ), wherein the laminated core ( 16 ) a plurality of axially stacked core fins ( 36 ), wherein - a core lamella ( 36 ) one at the stator ( 14 ) extending in the circumferential direction Kernjochbereich ( 36a ) and a radially projecting core tooth region ( 36b ) and wherein - the laminated core ( 16 ) at one of the end faces at least one end plate ( 34 ) with at least one end yoke area ( 34a ) and wherein the end plate ( 34 ) with one of the core lamellae ( 36 ) is executed deviating outer contour and wherein - a plurality of core yoke regions ( 36a ) with the end yoke area ( 34a ) the yoke ( 18 ), characterized in that the end lamella ( 34 ) relative to the radial direction of extension of a core lamella ( 36 ) is executed shortened. Stator according to claim 1, characterized in that a Kernjochbereich ( 36a ) and the end yoke area ( 34a ) on the core tooth areas ( 36b ) opposite radial side at least in sections a common contact contour ( 122 ) having a fixing portion of the yoke ( 18 ) for attachment to a carrier element ( 32 ). Stator according to claim 1 or 2, characterized in that the end plate ( 34 ) one from the end yoke area ( 34a ) radially projecting end tooth region ( 34b ), which in the circumferential direction of the stator ( 14 ) in relation to a core tooth region ( 36b ) is tapered and that several core tooth areas ( 36b ) with the end tooth region ( 34b ) a tooth ( 20 ) form. Stator according to one of claims 1-3, characterized in that the annular laminated core ( 16 ) segmented and in the circumferential direction a plurality of stator segments ( 22 ), wherein in each case two circumferentially adjacent stator segments ( 22 ) complementary joining contours ( 22c , d). Stator according to one of claims 1-4, characterized in that the laminated core ( 16 ) a coil winding ( 24 ), which by means of a front side of a tooth ( 20 ) arranged winding body ( 28 . 30 ). Stator according to one of claims 1-5, characterized in that the winding body ( 30 ) for arrangement on the laminated core ( 16 ) at least one retaining projection ( 30d , e, f), which the end plate ( 34 ) axially overlapping or which the Endlamelle ( 34 ) passes axially through, wherein the winding body ( 30 ) with the retaining projection ( 30d , e, f) on a core lamella ( 36 ) is supported. Stator according to one of claims 1-6, characterized in that between the end plate ( 34 ) and the retaining projection ( 30d , e) a gap ( 38a , b), in particular a radial gap ( 38a , b) is formed. Stator according to one of claims 1-7, characterized in that the laminated core ( 16 ) extending in the axial direction recess ( 16a ), in which the winding body ( 30 ) with respect to the stator ( 14 ) axial extension ( 30g ) intervenes. Stator according to one of claims 1-8, characterized in that the laminated core ( 16 ) at the yoke ( 18 ) at the height of a tooth ( 20 ) an approximately radially extending and axially traversing slot ( 16b ) having. Stator according to one of claims 1-9, characterized in that the winding body ( 30 ) tooth side on the laminated core ( 16 ) an end plate ( 34 ) encloses. Stator according to one of claims 1-10, characterized in that the yoke ( 18 ) of the laminated core ( 16 ) with the attachment section ( 122 ) on a cylindrical receiving portion ( 32a ) of a carrier element ( 32 ) and wherein the carrier element ( 32 ) two attacks ( 32b , c), between which the laminated core ( 16 ) is clamped axially non-positively, wherein the end plate ( 34 ) by means of a caulking area ( 32d ) or more circumferentially distributed Verstemmbereiche ( 32d ) on the carrier element ( 32 ). Stator according to one of Claims 1-11, characterized in that the caulking region ( 32d ) on the carrier element ( 32 ) is executed and the Endjochbereich ( 34a ) of the end plate ( 34 ) of the laminated core ( 16 ) At least partially covered radially.

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