DE102009003228A1 - Electrical machine i.e. electric motor, for external force-operated adjustment of element e.g. sliding roof, of motor vehicle, has centering noses radially centering lamella package relative to shaft, where noses are provided in lamella - Google Patents

Abstract

The machine (1) has a rotor (2) comprising lamellas (5, 7), and a shaft (8), where springy clamping noses (10-12) for each lamella package (6) is formed on the lamellas. The clamping noses indirectly attach the lamella package at the shaft. Centering noses (13-16, 21) are formed at either of the lamellas for radial centering of lamella package relative to the shaft, where the clamping noses and centering noses are provided in the lamella. The shaft is made of non ferrousmagnetic material such as non ferrousmagnetic steel.

Description

State of the art

The The invention relates to an electrical machine, in particular a Electric motor with a rotor and a shaft. Specially concerned the invention the field of electric motors for motor vehicles, in particular serving as electrical auxiliary drives electric motors for power-operated Adjustment or in support of an adjustment of elements of a motor vehicle.

From the DE 195 23 789 A1 is an electric motor with a rotor, a stator and other components, which are housed in a housing of the electric motor known. On the stator are several stator windings on a stator core. Such a stator core is fixedly mounted on the outer circumference of a support sleeve and consists of magnetic or magnetizable material. Further, the rotor is fixedly mounted on a shaft of the electric motor. In operation, the control current to the various stator windings on the armature of the stator is controlled by means of a control circuit such that a rotating magnetic field results inside the motor. This will then take the rotor with you.

The from the DE 195 23 798 A1 known electric motor has the disadvantage that the attachment of the fins and / or the disk packs on the shaft is expensive.

From the EP 1 309 066 A2 is known a spoke rotor.

rotors may consist of one or more disc packs or off Single louvers and other components to be constructed. The slats or disk packs are pushed axially onto the shaft, so that they immediately adjoin one another.

Conceivable it is that the attachment of the slats and / or the disk packs is performed on the shaft by a cylindrical interference fit. So when pressing the disk packs on the shaft forces do not increase too much, must be the joining partners be tolerated closely. However, this means high production costs, which are too expensive for many applications. For connections, where the attachment only by a press fit is generated as a result of high coverage when joining on the shaft and the packages grooves. Form and depth of the grooves have a high dispersion, whereby in the assembled state Error in coaxiality and one insufficient great holding power occur. In addition, these can Scattering values strongly.

Disclosure of the invention

The inventive electric machine with the Features of claim 1 has the advantage that a production the electric machine is facilitated. Specifically, an improved Mode of operation at relatively low cost production be enabled.

By the measures listed in the dependent claims are advantageous developments of specified in claim 1 electric machine possible.

In Advantageously, magnets used in the rotor by means of clamping nipples that already exist in the package, be positioned and fixed. Especially with a spoke rotor designed rotor has the advantage that an electric Machine made with a high power density of the spoke rotor can be, with the spoke rotor has many poles.

Furthermore can advantageously an improved assembly of the rotor be enabled on the shaft. Specifically, a relative enabling cost-effective production, in which the desired radial centering of one or more disk packs is ensured to the shaft of the electric machine.

Advantageous It is that at several lamellae of the disk pack clamping nipples are trained and that not behind each Klemmnäschen the lamella is provided a free space. This can be a high Holding force can be achieved. One behind a pinch provided free space facilitates the assembly by bending the Klemmnäschens, but allows in the fully assembled Condition also that the clamping nubs in a relatively strong bent Condition remains. The Klemmnäschen then generates a relative small holding power. By a free space it may also come to a certain plastic deformation of the terminal tube, so that the holding force is also low. At least not provided behind each Klemmnäschen the blade a clearance is, the rigidity of Klemmnäschen is increased. There is also an additional support the Klemmnäschens allows.

It is also advantageous that at least two fins are provided, which are designed differently. Furthermore, it is advantageous that at least two disc packs are provided, which are installed one behind the other. As a result, a structure is possible in which differently configured slats are supplemented so that several advantages can be combined. For example, terminal lamellae may be related to attachment be optimized optimized on the shaft, while one or more intervening fins are optimized in terms of attachment of the magnets or the like. This results in a reliable attachment to the shaft and on the other a reliable attachment of the magnets, air gaps or the like between the individual slats, which may occur due to installation, are avoided.

Advantageous It is also that single lamellae one or more Klemmnäschen have for fixing the magnets. Thus, a reliable Attachment made by means of clamping lugs.

Advantageous is it that the slats with web on a magnet pocket and / or without bridge on a magnetic pocket are executed. Further It is advantageous that the slats with web on the air gap and / or are designed without web on the air gap. Is advantageous it further, that the width of an externally arranged web and / or the width of an internally arranged web on the magnet pocket is very small or that there are no webs on the magnet pocket are and in addition to the non-positive connection an adhesive is introduced between the shaft and the disk pack is. Furthermore, it is advantageous that in at least one magnetic pocket for Increasing the stability of the rotor in the free spaces an adhesive is introduced between the disk pack and the magnet is and / or that to increase stability the clearances between the disk pack and the shaft and / or the free spaces between the disk pack and the Magnet filled with plastic. This can be used for a reliable attachment to the shaft and a Reliable attachment of the magnets done. Air gaps, the in terms of a reliable attachment and a advantageous magnetic flux are undesirable thereby at least largely avoided and the leakage flux minimized become.

Further It is advantageous that the disk pack coated with plastic is. Here, the plastic advantageously a thermoset or a thermoplastic. In this case, it is also possible that the disk pack with a hollow cylindrical shell coated, wherein the hollow cylindrical shell is preferably of a non-ferromagnetic material, in particular a non-ferromagnetic steel. This can be used for the stability of the rotor can be further improved. On the other hand, a possible air gap between the rotor and the stator are optimized so that this possible is small.

Further It is advantageous that a contour of the slats on the air gap sinusoidal is executed. This can be an advantageous field curve for Minimization of the cogging torque can be achieved. Is possible it is also that a contour of the lamellae at the air gap cylindrical is executed. This has the advantage that in the field of Contour the smallest possible air gap is formed, thereby can result in a higher power density.

Advantageous It is also that the disk packs a limitation to each other exhibit. By such a restriction, the torque ripple and the cogging torque of the electric motor can be reduced.

Advantageous it is further, that at least one blade on at least one Magnetic pocket a springy, curved clamping nub is provided, that for fixing a magnet in the magnet pocket serves. Such an arcuate Klemmnäschen allows on the one hand, an advantageous and simple installation of the magnet in the magnetic bag. On the other hand, even in the bent state of Klemmnäschens a reliable holding power exercised the magnet.

Advantageous It is also that the slats for aligning the slats on the Shaft each have at least one bore. It is also advantageous here that the bore provided on a Zentriernäschen the blade is. By such successive holes of several slats can For example, a pin-shaped element of an assembly tool be guided. When assembling the individual slats then with respect to the shaft in a circumferential direction, the means tangential, aligned with each other. This facilitates a precise assembly of the electrical machine. Further the lamellae can each also at least one point of connection exhibit.

Further can the electric machine according to the invention with the features of claim 1 also by further measures, which may additionally or alternatively be provided be further educated.

Advantageous it is that the Klemmnäschen formed nose-shaped is. Such a Klemmnäschen may be something in the assembly be bent, so that a reliable radial Centering results and also a certain bias in a radial direction is enabled.

Advantageous it is also that the Klemmnäschen at least in a radial Direction is biased and thereby the slats and / or the disk packs are fixed positively on the shaft.

Furthermore, it is advantageous that clamping lugs are formed on a plurality of lamellae of the lamella packet and that at least in an axial direction a free space behind a clamping lug is provided. This allows for a certain bending of the clamping tube during assembly.

Advantageous it is also that the centering bushes towards the shaft is designed with a play or transition fit. there The centering noses can be distributed around the circumference be arranged on a circular path. The centering rams Together form a cylindrical shoulder, the the blades of the disk pack are positioned concentrically with the shaft. The cylindrical shoulder is not closed at the periphery.

Possible it is also that the centering bushes towards the shaft is designed with a positive coverage and that the centering is designed at least partially elastically deformable. Here, the Zentriernäschen distributed around the circumference be arranged on a circular path. The centering rams together form a cylindrical heel that the Slats of the disk pack positioned concentrically to the shaft. This cylindrical heel is not closed at the circumference.

In Advantageously, the shaft is at least in one area of the Slat packages infinitely designed.

Advantageous It is further, that the Klemmnäschen in one inward directed radial direction have a decreasing stiffness. It is particularly possible that the Klemmnäschen decreasing in the inward radial direction have tangential width. It is also possible that the clamping noses in the inward, radial Direction of an at least partially decreasing material thickness exhibit.

Advantageous it is that the Klemmnäschen towards the shaft at least essentially uniformly curved are bent over.

Further it is advantageous that a tangential position at least in Essentially arranged in succession Klemmnäschen several Slats varied.

Advantageous It is also that every single lamella at least two radially having opposite centering.

The Clamping noses preferably have a smaller radius toward the wave surface as the centering ridges. Or the Zentriernäschen point to the shaft surface towards a recess or recess, so that the Zentriernäschen with two separate abutment surfaces abut the shaft. For example The Zentriernäschen have advantageously through holes on, for the tangential alignment of the different Zentriernäschen serve each other. The slats preferably have recesses, axially inserted into the permanent magnets and in particular therein can be clamped. Between the permanent magnet and the shaft can be thin in an advantageous manner Webs may be formed in the circumferential direction. This will be a Cavity formed between the webs and the shaft, the leakage flux is minimized. The clamping and Fixiernäschen are with respect the circumferential direction is preferably arranged between the magnets.

Consequently For example, an electrical machine, in particular a Electric motor, which are arranged on the shaft Rotor body, wherein the rotor body a or more laminations, in which formations for Permanent magnets are formed, extending in the radial direction extend to the shaft. The rotor body is hereby means a clamping connection at least indirectly connected to the shaft. Of the Rotor body has at least one Klemmnäschen to at least indirect attachment to the shaft. Further points the rotor body at least two Zentriernäschen for radial centering of the rotor body relative to the Wave up.

ever according to the embodiment of the electrical machine can in particular the following parts are obtained.

It a rotor with a high power density can be created. Serving as a laminated core laminated core can here in the context a mass production can be produced inexpensively. For example The laminations can be easily made by punching be combined by punching packetization into a laminated core. When punching packages, the individual sheets are punched nubs connected. A post-processing of the laminated core by means of a chip-removing Procedure is not necessary here. Such laminated cores can for both large and smaller rotors Size to be designed. For radial positioning and for fixing the magnets by means of resilient Clamping noses pressed against a fixed stop become. As a result, the positioning is clearly determined and the Fixing the magnets is solved very easily. By the contour of the slats and the structure of the slat pack with different slats the magnetic leakage flux can be minimized.

Brief description of the drawings

Preferred embodiments of the invention are described in the following description with reference to the accompanying drawings, in which corresponding elements are provided with matching reference numerals, explained in more detail. It shows:

1 an electrical machine in an excerpt, schematic sectional view according to a first embodiment of the invention;

2 a lamella of a rotor of 1 illustrated electric machine according to a second embodiment of the invention;

3 a lamella of a rotor of 1 illustrated electrical machine according to a third embodiment and

4 a lamella of a rotor of 1 illustrated electrical machine according to a fourth embodiment of the invention.

Description of the embodiments

1 shows an electric machine 1 in a partial, schematic sectional view according to a first embodiment. The electric machine 1 can be configured in particular as an electric motor and serve for a motor vehicle. Especially suitable is the electric machine 1 for the power-operated adjustment of elements of a motor vehicle, for example a sunroof, a window or a seat element. Furthermore, the electric machine 1 serve as an electric motor for steering power assistance. The electric machine according to the invention 1 However, it is also suitable for other applications.

The electric machine 1 has a rotor 2 and a stator 3 on that inside a case 4 are arranged. Here is the stator 3 firmly with the housing 4 connected while the rotor 2 rotatably in the housing 4 is stored. The stator 3 may comprise a plurality of stator packs, a magnetic field of alternating polarization in the region of the rotor 2 to create.

In 1 is a lamella 5 a lamella package 6 of the rotor 2 shown. Behind the slat 5 is another lamella 7 of the disk pack 6 shown. The slats 5 . 7 and a plurality of further fins form the rotor 2 , where these are combined into one or more disk packs. The slat package 6 is on a wave 8th assembled. Here is the disk pack 6 in this embodiment, indirectly with the shaft 8th connected. Here is between the shaft 8th and the disc pack 6 a bush made of a non-ferromagnetic material joined. The socket 9 is here designed as a hollow cylinder. The socket 9 is with the wave 8th connected. Furthermore, the disk pack 6 on the socket 9 clamped. The wave 8th may also be formed of a non-ferromagnetic material. By such an embodiment of the shaft 8th and the socket 9 Magnetic flux losses can be minimized.

At the lamella 5 are several Klemmnäschen 10 . 11 . 12 educated. The clamping noses 10 . 11 . 12 serve to fasten the plate pack 6 on the shaft 8th , Furthermore, at the lamella 5 several Zentriernäschen 13 . 14 . 15 . 16 educated. The centering rams 13 to 16 serve for the radial centering of the disk pack 5 relative to the wave 8th ,

The further lamella 7 also has clamping noses 20 and centering noses 21 of which in the 1 to simplify the illustration, only the clamping nub 20 and the centering nose 21 Marked are. Here is the Klemmnäschen 20 the further lamella 7 behind the centering nose 15 the slat 5 arranged and the Zentriernäschen 21 the further lamella 7 is behind the clamping noses 11 the slat 5 arranged.

By this configuration are behind the Klemmnäschen 10 . 11 . 12 the slat 5 Zentriernäschen 21 the further lamella 7 arranged so that behind each clamping nub 10 . 11 . 12 the slat 5 no clearance is provided. The slat 5 and the further lamella 7 are in this case parts of a disk pack 6 , However, it is also possible that the slats 5 . 7 belong to different disc packs before mounting and get in contact with each other during mounting. As a result, two or more disk packs can be provided, which are then installed one behind the other. Such disk packs may be identical to each other or designed differently.

The slats 5 . 7 and further slats of the disk pack 6 have recesses, the magnetic pockets 22 . 23 form. There are in the 1 only the magnetic bags 22 . 23 characterized. In the magnetic pockets 22 . 23 are magnets 24 . 25 arranged, which are designed as permanent magnets. Here are several magnets 24 . 25 in magnetic pockets 22 . 23 introduced, resulting in north and south poles on the disk set 6 that resulted in the 1 are marked by "N" for North Pole and "S" for South Pole.

The slat 5 points to the magnetic pockets 22 . 23 Stege 26 . 27 on. The bridges 26 . 27 are at an air gap 28 between the disk pack 6 and the stator 3 intended. Furthermore, the lamella points 5 on the magnetic pockets 22 . 23 Stege 29 . 30 on that to the shaft 8th towards the magnetic pockets 22 . 23 are provided.

In the magnetic pockets 22 . 23 can to increase the stability of the rotor 2 in any remaining free space between the disk pack 6 and the magnet 24 . 25 an adhesive may be incorporated. To increase the stability such free spaces can be completely filled with the adhesive. Furthermore, a plastic may be provided, which serves to fill. In addition, also a remaining space 31 between the disk pack 6 and the socket 9 or the wave 8th filled with plastic to ensure the stability of the rotor 2 to improve. Such a plastic may be a thermoset or a thermoplastic.

The slat 5 has holes 32 of which in the 1 to simplify the illustration, only the bore 32 is marked. In this embodiment, the bore 32 at the lamella 5 intended. It can be several of the lamella 5 corresponding lamellae be packetized one behind the other, with pin-shaped elements of an alignment and assembly tool in such holes 32 intervention. This allows the slat 5 along with other lamellae with respect to the shaft 8th be aligned. In this embodiment, the bore 32 at the centering nose 14 intended.

2 shows a lamella 5 a rotor 2 the in 1 illustrated electric machine 1 according to a second embodiment. In this embodiment, the blade is 5 at the magnet pocket 22 to the air gap 28 out without a bridge. There are approaches 35 . 36 provided, one in the magnet pocket 22 held magnet outwards.

The approaches 35 . 36 are not necessary on every lamella. However, in order to reduce the number of different slats, preferably all slats are with lugs 35 . 36 executed.

3 shows a lamella 5 a rotor 2 the in 1 illustrated electric machine 1 according to a third embodiment. Here are several Klemmnäschen 10 . 11 . 12 provided, of which in the 3 only the clamping noses 10 . 11 . 12 Marked are. Furthermore, several Zentriernäschen 13 . 14 . 15 provided, of which in the 3 only the centering noses 13 . 14 . 15 Marked are. In this arrangement, in each case either a Klemmnäschen or a Zentriernäschen is arranged between each two adjacent magnetic pockets. For example, between the magnetic pockets 22 . 23 the clamping nub 11 intended. In this embodiment, the blade is 5 on the magnetic pockets alternately with web and without web at the air gap 28 executed. For example, the lamella 5 at the magnet pocket 22 without bridge to the air gap 28 executed, with the approaches 35 . 36 are provided for holding a magnet. Furthermore, the lamella 5 at the magnet pocket 23 with jetty 27 to the air gap 28 executed. Inside is the lamella 5 on all magnetic pockets 22 . 23 with bars 29 . 30 executed.

4 shows a lamella 5 a rotor 2 the in 1 illustrated electric machine 1 according to a fourth embodiment. In this embodiment, the lamella 5 multiple nodes 32 on. It is in the 4 only the node 32 characterized. The linking points 32 serve to connect the lamella 5 with several further fins to the disk pack 6 , The slat 5 is at the magnet pockets 22 . 23 inward without bar. There are openings 37 . 38 provided an air gap between the north and south pole in the assembled state of the magnets 24 . 25 form. In addition, the lamella points 5 at the magnet pocket 22 a resilient, arcuate Klemmnäschen 39 on top of that, to attach the magnet 24 in the magnet bag 22 serves. Accordingly, the lamella 5 also on the magnet pocket 23 a Klemmnäschen 40 on. Correspondingly, on all magnetic pockets, in particular the magnetic pockets 22 . 23 Magnets, in particular the magnets 24 . 25 to be attached.

The slat package 6 is also of a hollow cylindrical shell 45 jacketed. The hollow cylindrical shell 45 is made of a non-ferromagnetic material, in particular a non-ferromagnetic steel. Through the hollow cylindrical shell 45 On the one hand, the stability of the disk pack 6 be improved.

The slat 5 as well as further lamellae of the lamella package 6 can be a sinusoidal designed contour 46 at the air gap 28 , that is on its outside, have. It is also possible that the contour 46 the slat 5 and the other fins of the disk pack 6 at the air gap 28 is cylindrical.

The slats 5 . 7 a lamella package 6 can be identical to each other or, as it is in the 1 is illustrated, designed differently. By using differently designed slats 5 . 7 within a lamella package 6 can favorable properties of the rotor 2 be achieved in relation to the particular application. It is also possible that identically designed lamellae within a lamella package 6 twisted against each other within the disk pack 6 are arranged. Furthermore, a combination of different slats, which are layered twisted, take place.

By a sinusoidal contour 46 can be a sinusoidal course of the field curve in the air gap 28 be generated. This allows the cogging torque and the ripple of the electric machine 1 opposite a cylindrical course in the air gap 28 be reduced. On the other hand, with a cylindrical contour 46 at the air gap 28 a compact design and thus a high power density of the electric machine 1 be achieved.

The design of Klemmnäschen 10 . 11 . 12 . 20 . 39 . 40 and the design of Zentriernäschen 13 . 14 . 15 . 16 . 21 is preferably so specified or they are adapted to each other so that during assembly at least slight bending of the clamping lugs 10 to 12 . 20 . 39 . 40 takes place while the Zentriernäschen 13 to 16 . 21 not or only minimally bent. By a suitable form of clamping and Zentriernäschen 10 to 16 . 20 . 21 . 39 . 40 can be in different places a contact with the shaft 8th or the socket 9 be achieved. This can also prevent the shaft 8th or the socket 9 in the area of Zentriernäschen 13 to 16 . 21 through one of the clamping noses 10 to 12 . 20 . 39 . 40 roughened or otherwise damaged. Thus, a reliable centering and fixing of the disk pack 6 on the wave 8th be achieved. This results in a very good concentricity between the disk pack 6 and the wave 8th achieved.

For example can be configured in this way a 14-pin rotor. In However, rotors can work with one another in the same way Polzahl be realized.

In a disk pack 6 that with magnets 24 . 25 can be fitted only between magnets 24 . 25 with the same Polausrichtung a clamping or Zentriernäschen be present. For example, only at the north pole, a clamping or Zentriernäschen be present. But it can also be present only at the south pole a clamping and Zentriernäschen. As a result, the magnetic leakage flux across the shaft is between the north poles and the south poles 8th minimized.

The thickness of a lamella 5 . 7 can be changed over the sheet used. The width of the disk pack 6 is about the number of sheets that belong to the disk pack 6 be assembled, specifiable.

The Invention is not limited to the described embodiments limited.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 19523789 A1 [0002]
• DE 19523798 A1 [0003]
• - EP 1309066 A2 [0004]

Claims (22)

Electric machine ( 1 ), in particular electric motor, with a rotor ( 2 ) and a wave ( 8th ), wherein the rotor ( 2 ) several fins ( 5 . 7 ), the lamellae ( 5 . 7 ) individually or as a plate pack ( 6 ) or by means of several disk packs ( 6 ) pre-assembled on the shaft ( 8th ) and the lamellae ( 5 . 7 ) and / or the disk packs ( 6 ) at least indirectly with the shaft ( 8th ), characterized in that each disc pack ( 6 ) on at least one lamella ( 5 . 7 ) a Klemmnäschen ( 10 . 11 . 12 . 20 . 39 . 40 ) is formed, which for at least indirectly fixing the plate pack ( 6 ) on the shaft ( 8th ), and that on the lamella ( 5 ) and / or on at least one further lamella ( 7 ) a centering hub ( 13 . 14 . 15 . 16 . 21 ) is formed, which for at least substantially radial centering of the disk pack ( 6 ) relative to the shaft ( 8th ), or if the rotor ( 2 ) of several individual slats ( 5 . 7 ), each individual lamella ( 5 . 7 ) at least one springy clamping nose ( 10 . 11 . 12 . 20 . 39 . 40 ) and at least two Zentriernäschen ( 13 . 14 . 15 . 16 ). Electrical machine according to claim 1, characterized in that at several fins ( 5 . 7 ) of the disk pack ( 6 ) Clamping noses ( 10 . 11 . 12 . 20 . 39 . 40 ) are formed and that not behind each Klemmnäschen ( 10 . 11 . 12 . 20 . 39 . 40 ) of the lamella ( 5 . 7 ) a free space is provided. Electrical machine according to claim 1 or 2, characterized in that at least two disc packs ( 6 ) are provided, which are designed differently. Electrical machine according to one of claims 1 to 3, characterized in that at least two disc packs ( 6 ) are provided, which are installed one behind the other. Electrical machine according to one of claims 1 to 4, characterized in that individual slats ( 5 . 7 ) one or more clamping noses ( 39 . 40 ) for fixing the magnets ( 24 . 25 ) exhibit. Electrical machine according to one of claims 1 to 5, characterized in that the lamellae ( 5 . 7 ) with jetty ( 26 . 27 . 29 . 30 ) on a magnetic bag ( 22 . 23 ) and / or without a bridge on a magnetic pocket ( 22 . 23 ) are executed. Electrical machine according to one of claims 1 to 6, characterized in that the lamellae ( 5 . 7 ) with jetty ( 26 . 27 ) at the air gap ( 28 ) and / or without web on the air gap ( 28 ) are executed. Electrical machine according to claim 6 or 7, characterized in that the width of an externally arranged web ( 26 . 27 ) and / or the width of an internally arranged web ( 29 . 30 ) on the magnet pocket ( 22 . 23 ) is very small or that no webs on the magnet pocket ( 22 . 23 ) are present and in addition to the non-positive connection between the shaft ( 8th ) and the disk pack ( 6 ) An adhesive is introduced. Electrical machine according to one of claims 1 to 8, characterized in that in at least one magnetic pocket ( 22 . 23 ) for increasing the stability of the rotor ( 2 ) in free spaces between the disk pack ( 6 ) and the magnet ( 24 . 25 ) an adhesive is introduced and / or that to increase the stability of the free spaces ( 31 ) between the disk pack ( 6 ) and the wave ( 8th ) and / or the free spaces between the disk pack ( 6 ) and the magnet ( 24 . 25 ) are filled with the plastic. Electrical machine according to one of claims 1 to 9, characterized in that the shaft ( 8th ) is formed of a non-ferromagnetic material, in particular a non-ferromagnetic steel. Electrical machine according to one of claims 1 to 10, characterized in that between the shaft ( 8th ) and the disk pack ( 6 ) a bush made of a non-ferromagnetic material, in particular a non-ferromagnetic steel, is joined. Electrical machine according to one of claims 1 to 11, characterized in that the disk pack ( 6 ) with plastic ( 45 ) is sheathed. Electrical machine according to claim 12, characterized that the plastic is a thermoset and / or that the plastic a thermoplastic is. Electrical machine according to one of claims 1 to 13, characterized in that the disk pack ( 6 ) with a hollow cylindrical shell ( 45 ) is sheathed. Electrical machine according to claim 14, characterized in that the hollow cylindrical shell ( 45 ) is formed of a non-ferromagnetic material, in particular a non-ferromagnetic steel. Electrical machine according to one of claims 1 to 15, characterized in that a contour of the slats ( 5 . 7 ) at the air gap ( 28 ) is designed sinusoidal. Electrical machine according to one of claims 1 to 15, characterized in that a Contour of the slats ( 5 . 7 ) at the air gap ( 28 ) is cylindrical. Electrical machine according to one of claims 1 to 17, characterized in that between the shaft ( 8th ) and the disk pack ( 6 ) a socket ( 9 ), in particular a hollow cylindrical bushing ( 9 ) is arranged. Electrical machine according to claim 18, characterized in that the bushing ( 9 ) is formed of a non-ferromagnetic material, in particular a non-ferromagnetic steel. Electrical machine according to one of claims 1 to 19, characterized in that on at least one blade ( 5 . 7 ) on at least one magnetic pocket ( 22 . 23 ) a resilient, arcuate Klemmnäschen ( 39 . 40 ), which is used to attach a magnet ( 24 . 25 ) in the magnet pocket ( 22 . 23 ) serves. Electrical machine according to one of claims 1 to 20, characterized in that the lamellae ( 5 . 7 ) for aligning the slats ( 5 . 7 ) on the shaft ( 8th ) in each case at least one connection point ( 32 ) and / or at least one bore ( 32 ) exhibit. Electrical machine according to claim 21, characterized in that the point of connection ( 32 ) and / or the bore ( 32 ) on a centering hub ( 14 ) of the lamella ( 5 ) is provided.