DE102017207158A1 - Magnetic recording module for a rotor and rotor of an electrical machine and method for their respective production - Google Patents

Abstract

The present invention relates in a first aspect to a magnetic receiving module for a rotor of an electric machine, comprising a circumferentially formed non-magnetic receiving device, with a plurality of recesses for receiving surface magnets, which are provided in a circumferential arrangement, wherein the receiving means the recesses at a radially surrounds the outer peripheral surface of the magnetic receiving module, and wherein the recesses are designed to be open on a radially inner side of the magnetic receiving module, so that therein surface magnets on the radially inner side are free to be accommodated. According to a second aspect, the present invention relates to a magnetic receiving module for a rotor of an electrical machine, comprising a plurality of surface magnets, which are provided in a circumferential arrangement, with a circumferentially formed non-magnetic recording device in which the surface magnets are firmly received, wherein the receiving device Surface magnets on a radially outer peripheral surface of the magnetic receiving module surrounds, and wherein the surface magnets are exposed on a radially inner side of the magnetic receiving module. Furthermore, the invention relates to a method for producing such a magnetic recording module. The invention also relates to a rotor for an electric machine with such a magnetic receiving module and a method for its production.

Description

FIELD OF THE INVENTION

The present invention relates to a magnetic receiving module for a rotor of an electric machine, a rotor of an electric machine, a method for producing a magnetic receiving module for a rotor of an electric machine and a method for producing a rotor of an electric machine.

TECHNICAL BACKGROUND

Electrical machines exist in various designs. In the so-called Innenläuferbauweise an internal rotor and an outer stator is provided. Often, for example, in a synchronous motor, the rotor is permanently energized. Accordingly, permanent magnets are accommodated in the rotor.

To provide advantageous magnetic flux characteristics, a rotor is often formed with a rotor core. The inclusion of permanent magnets of an internal rotor is sometimes provided integrated into the laminated core of the rotor. In this case, one speaks of so-called pocket magnets, since the permanent magnets are accommodated in pockets of the rotor core.

Another design is to attach the permanent magnets to the radially outer surface of the laminated core. In this case one speaks of so-called surface magnets. Occasionally, the surface magnets are usually glued on, attached or secured by other components and processes relatively expensive to solve.

For example, surface magnets can be applied to the laminated core and then encapsulated on its outside with a plastic material. Such a method is for example in the DE 10 2015 206 100 described. However, several manufacturing steps for mounting and securing the surface magnets are necessary, which are always made on the entire rotor core. Thus, the handling is relatively cumbersome and the relatively complex tolerances of the laminated core must, especially when applying the surface magnets, be noted.

SUMMARY OF THE INVENTION

Against this background, the present invention seeks to simplify the production of a rotor with surface magnets.

According to the invention this object is achieved by a magnetic recording module having the features of the patent claim 1 or 2 and / or by a rotor having the features of the patent claim 6 and / or a method for producing a magnetic recording module according to 11 and / or a method for producing a rotor having the features of the patent claim 12 solved.

According to a first aspect, there is provided a magnetic receiving module for a rotor of an electrical machine, comprising a circumferentially formed non-magnetic receiving means having a plurality of recesses for receiving surface magnets, which are provided in a revolving array, wherein the receiving means the recesses on a radially outer peripheral surface surrounds the magnet receiving module, and wherein the recesses are designed to be open on a radially inner side of the magnetic receiving module, so that therein surface magnet on the radially inner side are free to be accommodated.

According to a second aspect, there is provided a magnetic receiving module for a rotor of an electric machine, comprising a plurality of surface magnets provided in a circumferential arrangement with a circumferentially formed non-magnetic receiving means in which the surface magnets are fixedly mounted, the receiving means engaging the surface magnets a radially outer circumferential surface of the magnetic receiving module surrounds, and wherein the surface magnets are exposed on a radially inner side of the magnetic receiving module.

According to a further aspect, a rotor for an electric machine is provided with a magnet receiving module according to the first or second aspect, with a rotor lamination stack which has on a radial outer side a corresponding to the radially inner side of the magnet receiving module, which is designed such that the magnetic receiving module can be mounted axially on the rotor laminated core.

According to another aspect, there is provided a method of manufacturing a magnetic receiving module for a rotor of an electric machine, in particular a magnetic receiving module according to the second aspect, comprising the steps of: positioning a plurality of surface magnets in a circumferential arrangement; and overmolding the surface magnets such that the overmoulding surrounds the surface magnets on a radially outer peripheral surface, the surface magnets firmly absorbs and leaves free on a radially inner side.

According to yet another aspect, a method for manufacturing a rotor for an electric machine is provided, in particular a rotor according to the invention, comprising the steps of: providing a magnetic receiving module, in particular a magnetic receiving module according to the invention; Providing a rotor laminated core, which has on a radial outer side corresponding to a radially inner side of the magnetic receiving module shape, and axially mounting the magnetic receiving module on the rotor core.

The idea on which the present invention is based is to produce a magnet receiving module designed for, in particular preassembled, mounting of surface magnets independently of the rotor laminated core of a rotor. Accordingly, the magnetic receiving module according to the invention is independent of the rotor laminated core with the surface magnet pre-assembled. Thus, according to the invention, an enclosure for all types of surface magnets (eg in loaf, sickle or block form) is made possible and a common connection interface, in particular for non-positive and / or positive connection, to the rotor laminated core is created which is independent of the pre-assembly of the magnets ,

For final assembly of a rotor, the magnetic receiving module is then axially mounted on a rotor core. Advantageously, the surface magnets are thus assembled together in one process and, in particular, need not be secured by complex geometries of the rotor lamination stack or additional processes on the rotor lamination stack, such as sticking or the like. Furthermore, no additional components are necessary because the receiving device serves as a surface protection or replaced at the same time. A conventional surface protection can be omitted.

In addition, complex tolerances in the rotor laminated core, which otherwise often have to be taken into account for the absorption of the surface magnets, are largely ignored. In addition, the susceptibility to errors of assembly also decreases, since, in particular, glues are more susceptible to errors and as a rule have a higher reject rate. According to the invention, the cycle time of the assembly can thus be increased overall by a reduction and simplification of assembly steps.

Since the surface magnets are exposed on the radially inner side of the magnetic receiving module, they lie in a final assembled state directly, in particular in the zero gap, on the rotor core. Thus, despite the ease of installation, a magnetic flux resistance in the rotor is advantageously minimized.

Axial mountability is to be understood as meaning, in particular, an axial pushability and / or shrinkability of the magnet receiving module onto the rotor lamination stack. Accordingly, the magnet receiving module for mounting relative to the rotor laminated core in the axial direction in such a way or at least as far, in particular coaxially, displaced until it surrounds the rotor laminated core circumferentially.

When mounting by sliding the magnet receiving module in particular a positive connection with the rotor laminated core is produced.

When mounting by shrinking the magnet receiving module in particular a frictional connection with the rotor laminated core is produced.

In the magnetic receiving module according to the first aspect, the surface magnets, in particular positive and / or non-positive, at least substantially or predominantly exposed lying in the recesses on the radially inner side of the magnetic receiving module before axial mounting or subsequent to the axial mounting. To accommodate the surface magnets, a pre-assembly or optionally. A subsequent assembly of the surface magnets can be made.

In the magnetic recording module according to the second aspect, surface magnets are received directly in the receiving device, in particular by the prototyping of the receiving device. In particular, they are received therein in a form-fitting and / or force-locking manner and on the radially inner side at least substantially or predominantly freely lying.

The non-magnetic recording device is in particular non-magnetic, non-magnetic or non-ferromagnetic. The material of the receiving device is thus an amagnetic material, for example plastic, aluminum, stainless steel or a combination thereof.

The surface magnets are provided as arranged in the final assembled state on the surface of the rotor laminated core permanent magnets. They can be magnetized before or after assembly. In particular, they can be individually magnetized independently of the rotor core, which allows a higher process flexibility. Furthermore, the saturation behavior can be increased by individual magnetization and thus the power density of an electric machine with the rotor can be increased.

Under a circumferential design of the receiving device is to be understood a closed ring-like training, with various configurations are conceivable. For example, it can be a round, polygonal or one of a plurality of circle segments arranged on a circular line with a smaller radius composite or flower-shaped circumferential training.

Under a circumferential arrangement of surface magnets is an arrangement to understand, which forms a substantially closed ring. The concrete shape of such a ring depends on the shape and number of surface magnets, with a wide variety of configurations are possible. For example, a plurality of straight surface magnets may form a polygonal ring. Crescent-shaped or box-shaped magnets can also form a round or flower-shaped ring.

In each case an intermediate region can be provided between the individual surface magnets, which is in particular filled by the receiving device. Preferably, over the inner circumference of the magnetic recording module, the proportion of surface magnets predominates. Nevertheless, the intermediate region, in particular also in comparison to an intermediate region filled in by rotor laminations, advantageously contributes to the reduction of disturbing flows. Thus, disturbance torques are reduced in an electric machine and increases the power density.

Advantageous embodiments and further developments will become apparent from the other dependent claims and from the description with reference to the figures of the drawing.

According to one embodiment of a magnetic receiving module according to the second aspect, the receiving device is formed as encapsulation of the surface magnets. The individual magnets are thus injected in their later mounting position, so that a coherent assembly in the form of the magnetic recording module is formed. By encapsulation is meant in particular a mold produced by injection molding or an injection molding technique, which is formed into a urethane around the arrangement of the surface magnets. Advantageously, therefore, no pre-assembly of the surface magnets on the rotor core or in the magnetic recording module needed. Instead, the surface magnets are taken in the prototyping of the magnetic receiving module directly therein regardless of the rotor core. In addition, as a long-lasting or consistent backup of the surface magnets is provided, which in particular does not lose its holding power as in conventional frictional connections on temperature aging, but can permanently compensate for the different expansion coefficients of surface magnet and rotor package.

In one embodiment of a magnetic receiving module according to the first or second aspect, the receiving device is formed on the radially inner side of the magnetic receiving module in at least one axial direction undercut, so that mounting of the magnetic receiving module on a rotor core by sliding and / or shrinking is possible. Thus, the assembly is advantageously simplified.

According to one embodiment of a magnetic receiving module according to the first or second aspect, the receiving device in an intermediate region between two recesses or surface magnets arranged, in particular integrally formed with the receiving device, positive locking means for securing the magnetic receiving module. Advantageously, a tool-free backup is thus possible.

According to a further embodiment of the rotor, the magnetic receiving module is formed with the form-locking means and the rotor laminated core has counter-form-closure means corresponding to the form-fitting means. The magnet receiving module is positively connected via the interlocking and Gegenformschlussmittel with the rotor laminated core. The connection can be produced, in particular, by axial pushing, with the interlocking and counter-form-locking means being pushed into one another.

According to one embodiment of the rotor, the radial outer side of the rotor lamination stack is formed without undercut in at least one axial direction. Thus, an axial assembly, for example by pushing and / or shrinking, allows.

According to a further embodiment of the rotor, the magnetic receiving module is non-positively connected to the rotor laminated core, in particular by shrinking. Conceivable are also combined positive and non-positive connections.

According to a preferred embodiment of the rotor, the surface magnets lie directly on the rotor laminated core and are contacted with it. Thus, a magnetic flux resistance is advantageously minimized.

According to an embodiment of the method for manufacturing a rotor, a magnetic receiving module according to the first aspect is provided. Before mounting, in particular pushing on and / or shrinking, surface magnets are introduced into the recesses, which be contacted during assembly with the rotor core.

According to a further embodiment of the method for producing a rotor, a magnet receiving module according to the first aspect is also provided. However, only after mounting, in particular pushing on and / or shrinking, the surface magnets are introduced into the recesses and thereby contacted with the rotor laminated core.

According to a further embodiment of the method for producing a rotor, a magnet receiving module according to the second aspect is provided, and the surface magnets are contacted during assembly, in particular sliding and / or shrinking, with the rotor laminated core.

The above embodiments and developments can, if appropriate, combine with each other as desired. In particular, all the features of a magnetic receiving module can be transferred to a rotor or to a method for producing a magnetic receiving module and / or a rotor. Further, the features of a rotor are transferable to a method of manufacturing a rotor, and vice versa.

Further possible refinements, developments and implementations of the invention also include combinations, not explicitly mentioned, of features of the invention described above or below with regard to the exemplary embodiments. In particular, the person skilled in the art will also add individual aspects as improvements or additions to the respective basic form of the present invention.

list of figures

• 1 ein Magnetaufnahmemodul gemäß einer ersten Ausführungsform;
• 2 das Magnetaufnahmemodul gemäß 1 bestückt mit Oberflächenmagneten;
• 3 ein Rotor mit einem mit Oberflächenmagneten bestückten Magnetaufnahmemodul gemäß 2;
• 4 eine Mehrzahl von in einer umlaufenden Anordnung vorgesehenen Oberflächenmagneten;
• 5 ein Magnetaufnahmemodul mit einer fest darin aufgenommenen Anordnung von Oberflächenmagneten gemäß 4;
• 6 einen Rotor mit einem Magnetaufnahmemodul gemäß 5;
• 7 eine Detaildarstellung eines Abschnitts eines Rotors gemäß 3 oder 6;
• 8 eine Detaildarstellung eines Abschnitts eines Rotors gemäß einer abgewandelten Ausführungsform;
• 9 eine Detaildarstellung eines Abschnitts eines Rotors gemäß einer weiteren abgewandelten Ausführungsform;
• 10 eine Detaildarstellung eines Abschnitts eines Rotors gemäß einer noch weiteren abgewandelten Ausführungsform;
• 11 eine Detaildarstellung einer Aufnahmeeinrichtung im Bereich eines Oberflächenmagneten gemäß 2 oder 5;
• 12 eine Detaildarstellung einer Aufnahmeeinrichtung im Bereich eines Oberflächenmagneten gemäß einer abgewandelten Ausführungsform;
• 13 eine Detaildarstellung einer Aufnahmeeinrichtung im Bereich eines Oberflächenmagneten gemäß einer weiteren abgewandelten Ausführungsform;
• 14 ein Magnetaufnahmemodul gemäß einer weiteren Ausführungsform;
• 15 ein Magnetaufnahmemodul gemäß einer Ausführungsform mit Umhüllung;
• 16 ein Magnetaufnahmemodul gemäß einer weiteren Ausführungsform mit Umhüllung;
• 17A einen Rotor gemäß einer Ausführungsform mit Umhüllung; und
• 17B den Rotor gemäß 17A mit umgeformter Umhüllung.

The present invention will be explained in more detail with reference to the exemplary embodiments indicated in the schematic figures of the drawing. It shows:

• 1 a magnetic receiving module according to a first embodiment;
• 2 the magnetic receiving module according to 1 equipped with surface magnets;
• 3 a rotor with a magnet equipped with surface magnet according to 2 ;
• 4 a plurality of surface magnets provided in a circumferential arrangement;
• 5 a magnetic receiving module having a fixedly received therein arrangement of surface magnet according to 4 ;
• 6 a rotor with a magnetic receiving module according to 5 ;
• 7 a detailed representation of a portion of a rotor according to 3 or 6 ;
• 8th a detailed view of a portion of a rotor according to a modified embodiment;
• 9 a detailed view of a portion of a rotor according to another modified embodiment;
• 10 a detailed view of a portion of a rotor according to a still further modified embodiment;
• 11 a detailed representation of a receiving device in the region of a surface magnet according to 2 or 5 ;
• 12 a detailed view of a receiving device in the region of a surface magnet according to a modified embodiment;
• 13 a detailed representation of a receiving device in the region of a surface magnet according to a further modified embodiment;
• 14 a magnetic receiving module according to another embodiment;
• 15 a magnetic receiving module according to an embodiment with envelope;
• 16 a magnetic receiving module according to another embodiment with enclosure;
• 17A a rotor according to a cladding embodiment; and
• 17B the rotor according to 17A with reshaped cladding.

The accompanying figures of the drawing are intended to convey a further understanding of the embodiments of the invention. They illustrate embodiments and, together with the description, serve to explain principles and concepts of the invention. Other embodiments and many of the stated advantages will become apparent with reference to the drawings. The elements of the drawings are not necessarily shown to scale to each other.

In the figures of the drawing are the same, functionally identical and same-acting elements, features and components - unless otherwise stated - each provided with the same reference numerals.

DESCRIPTION OF EMBODIMENTS

1 shows a magnetic receiving module 1A according to a first embodiment.

It is a magnetic recording module 1A for a rotor 2A an electrical machine, which has a circumferentially formed receiving device 3A having. The recording device 3A is made of an amagnetic material, such as plastic, aluminum or stainless steel. In particular, in the case of plastic or aluminum, it may be an injection molded part.

Furthermore, the receiving device 3A with a plurality of recesses 4 for receiving surface magnets 5 Mistake. These are on a radially inner side 7 the receiving device 3A provided in a circumferential arrangement. Accordingly, the receiving device surrounds 3A the recesses 4 on a radially outer peripheral surface 6 of the magnetic recording module 1A ,

Further, the recesses 4 on the radially inner side 7 of the magnetic recording module 1A open design. In this way, in the recesses ingestible surface magnets 5 in a recorded state (see 2 ) on the radially inner side 7 free.

For receiving surface magnets have the recesses 4 a geometry which is suitable for producing a surface magnet receiving positive connection.

In the illustrated embodiment are in the intermediate areas 9 between two recesses 4 each support extensions 13 intended. The support extensions 13 For this purpose, in the illustrated embodiment, they have noses which are oriented purely by way of example in the circumferential direction and which support surface magnets received in the recesses. In further embodiments, but also, for example, a side wall of the recess 4 be formed cake-like tapered, so that a circumferentially oriented component of the side wall produces the positive connection. Various other variants for the positive reception of the surface magnets in the receiving device 3A are conceivable within the meaning of the present invention, for example on the side walls of the recesses 4 provided grooves or the like.

2 shows the magnet receiving module 1A according to 1 equipped with surface magnets 5 which are in the recesses 4 introduced and recorded in a form-fitting. For example, the surface magnets can axially into the recesses 4 be inserted. Thus, a pre-assembled state of the magnetic pickup module 1A reached.

The surface magnets 5 are here purely exemplary example loaf, ie formed with a composite of a cuboid and a cylindrical portion geometry. Various other embodiments or forms of surface magnets are conceivable, for example, cuboid, sickle-shaped, or the like.

3 shows a rotor 12 with one with surface magnets 5 equipped magnetic recording module 1A according to 2 ,

It is a rotor 12 for an electric machine, which here purely as an internal rotor 12 is trained.

Next to the magnetic recording module 1A points the rotor 12 a rotor core 8th on. These are in particular a rotor laminated core without pockets provided for receiving magnets.

At a radial outside 11 of the rotor core 8th this one points to the radially inner side 7 of the magnetic receiving module equipped with magnets 1A corresponding form. The corresponding shape is designed such that with surface magnet 5 equipped magnetic recording module 1A for mounting the rotor axially on the rotor core 8th is deferrable.

By at the radial inside of the magnet receiving module 1A exposed surface magnets 5 lie the surface magnets 5 when mounted directly on the rotor core 8th and so are contacted.

Depending on the material or design of the recording device 3A can the magnet receiving module 1A also on the rotor core 8th be formed shrinkable. It may also be a combination of sliding and shrinking.

A method of manufacturing a rotor 2A Accordingly, for an electric machine providing a magnetic receiving module 1A according to 1 or 2 , providing a rotor core 8th which is on a radial outside 11 one to the radially inner side 7 of the magnetic recording module 1A having corresponding shape, and the axial mounting, in particular sliding and / or shrinking, of the magnetic receiving module 1A on the rotor core 8th in front.

Preferably, a magnetic receiving module 1A according to 2 provided. Before mounting, ie pushing on and / or shrinking, this will be the surface magnets 5 therefore in the recesses 4 of the magnetic recording module 1A according to 1 introduced, which in the mounting then automatically on its exposed radial inside with the rotor core 8th be contacted.

In a further modification, it would also be conceivable, initially only the magnetic recording module according to 1 without surface magnets 5 on the rotor core 8th defer or shrivel up and the surface magnets 5 only later axially in the recesses 4 of the pushed onto the rotor laminated core or shrunk magnetic recording module 1A insert. Accordingly, in this case, a magnetic receiving module 1A according to 1 provided. After sliding on and / or shrinking the surface magnets 5 then later in the recesses 4 introduced and thereby with the rotor core 8th contacted.

To a Aufschiebbarkeit or Aufschrumpfbarkeit the magnetic recording module 1A to ensure the radial outside 11 of the rotor core 8th formed undercut in at least one axial direction. Also, the recording device 3A on the radially inner side 7 of the magnetic recording module 1A formed undercut in at least one axial direction. Thus, an assembly of the magnetic receiving module 1A on the rotor core 8th by sliding and / or shrinking is possible.

If it is just a deferred magnetic recording module 1A can, for axial securing of the magnet receiving module 1A on the rotor core 8th For example, made a local transformation or a fastener can be introduced. When shrinking, this is not necessary because with the shrinking already an axial attachment is made.

4 shows a plurality of in a circumferential arrangement 12 provided surface magnet 5 ,

The order 12 is provided independently of a rotor core.

With such an arrangement is the formation of a magnetic receiving module 1B according to a second embodiment possible, in which the surface magnets 5 firmly in a circumferentially formed non-magnetic recording device 3B are included.

For example, the arrangement 12 provided in an injection mold.

5 shows a magnetic receiving module with a fixedly received therein arrangement of surface magnet according to 4 ,

The recording device 3B surrounds here in the same way as in relation to 1 and 2 described the surface magnets on a radially outer peripheral surface 6 of the magnetic recording module 1B , In contrast to 1 and 2 is the recording device 3B however, the arrangement 12 the surface magnets 5 formed, for example by molding or injection molding. Accordingly, the receiving device 3B here as encapsulation of the surface magnets 5 educated.

Same as in relation to 2 described are the surface magnets 5 but also in this embodiment on a radially inner side 7 of the magnetic recording module 1B free. For example, you can be arranged flush with the edge of an injection mold and overmolded.

To produce such an encapsulation, the surface magnets 5 for example, in the arrangement 12 be arranged in an injection mold, wherein the radially inner sides of the surface magnets 5 lie directly on an inner edge of the injection mold and are spaced from an outer edge of the injection mold. Subsequently, a casting material can be injected, so that the surface magnets are encapsulated, so that the encapsulation of the surface magnets 5 surrounds on a radially outer side.

A method of manufacturing such a magnetic recording module 1B for a rotor 2 B An electric machine accordingly sees the positioning of the surface magnets 5 in the circumferential arrangement 12 and the overmolding of the surface magnets 5 such that the encapsulation the surface magnets 5 on a radially outer peripheral surface 6 surrounds and on a radially inner side 7 free, before.

As the material for the encapsulation are non-magnetic injection molding materials, in particular plastics or aluminum or aluminum alloys, in question.

6 shows a rotor with a magnetic receiving module according to 5 ,

In the same way as in relation to 3 described has the rotor core 8th on its radial outside 11 one to the radially inner side 7 of the magnetic recording module 1B corresponding form. Accordingly, here too the magnetic recording module 1B for mounting axially on the rotor core 8th deferred or shrunk.

In contrast to 3 therefore a magnetic recording module 1B according to 5 provided and the surface magnets 5 be in the sliding and / or shrinking with the rotor core 8th contacted.

Accordingly, an axial securing, for example by local forming, a fastening means or the like, is provided even in the case of a pure pushing.

7 shows a detailed representation of a portion of a rotor 2 according to 3 or 6 ,

The rotor 2 points, as regards 3 and 6 described, a rotor core 8th and a magnetic receiving module 1 with a recording device 3 These are both the first and the second embodiment of a magnetic receiving module 1A or 1B with a recording device 3A or 3B can act. The examples of embodiments described below are thus applicable to both embodiments described above.

In the radial outer peripheral surface 6 of the magnetic recording module 1 This has a circular shape around. On the radially inner side is the shape of the magnet receiving module 1 polygonal, here purely exemplary decagonal or 10-sided, provided. Accordingly, the radial outer side of the rotor core is also 8th in the same way polygonal, here by way of example decagonal trained. The polygonal shape secures the rotor core 8th opposite the magnet receiving module 1 in the circumferential direction or rotation direction.

8th shows a detailed representation of a portion of a rotor 2 according to a modified embodiment.

In this modification is different from 7 the radially inner side magnet receiving module 1 also round or hollow cylindrical. The inner surface of the surface magnets is adapted to this round shape adapted.

Accordingly, the rotor core is also 8th on its radial outside 11 round or cylindrical.

Such a shape is in particular for shrunk-on magnetic receiving modules 1 expedient because a rotational security is created by the shrinking.

The magnet receiving module is corresponding 1 here frictionally with the rotor core 8th connected.

9 shows a detailed representation of a portion of a rotor 2 according to another modified embodiment.

In this embodiment, the surface magnets 5 sickle-shaped. A radius of the sickle shape is smaller than an inner radius of the magnet receiving module 1 so that on a radially inner side 7 of the magnetic recording module 1 a flower-shaped configuration is provided. The rotor core 8th has a corresponding flower-shaped configuration, wherein locally each have the same radii as in the sickle shape of the surface magnets 5 are provided.

10 shows a detailed representation of a portion of a rotor 2 according to yet another modified embodiment.

In this embodiment differs compared to 7 the shape of the receiving device 3 on the radially outer peripheral surface 6 of the magnetic recording module 1 , The receiving device 3 is here with a constant material or wall thickness 14 educated. Thus, results from the Brotlaibform the surface magnets 5 on the radially outer peripheral surface 6 a flower shape. Of course, this shape in other surface magnet shapes with constant material thickness 14 the receiving device 3 be adapted adapted in another way. For example, in the case of cuboid surface magnets 5 around a polygonal shape of the radially outer peripheral surface 6 act.

11 shows a detailed representation of a recording device 3 in the area of a surface magnet 5 according to 2 or 5 ,

The intermediate areas 9 the receiving device 3 which are located between the surface magnets 5 complete the arrangement of surface magnets 5 here to a polygonal shape on the radially inner side 7 of the magnetic recording module 1 , In particular, the intermediate areas form 9 each corner of the polygonal shape.

The intermediate areas 9 In addition to the absorption of the surface magnets, magnetic flux optimization also serves to avoid disturbing flows.

12 shows a detailed representation of a recording device 3 in the area of one surface magnet 5 according to a modified embodiment.

In this embodiment, the receiving device 3 in the intermediate area 9 between two recesses 4 or surface magnets 5 arranged, integral with the receiving device 3 trained positive locking means 10 in the form of a groove. These positive locking means 10 are to secure the magnetic recording module 1 on the rotor core 8th intended.

Correspondingly, a rotor laminated core provided for this embodiment has 8th to the positive locking means 10 corresponding counter-form-locking means. In the embodiment illustrated here, the counter-form-locking means are, in particular, springs with a round tip which are provided on the rotor laminated core and can be inserted into the grooves.

In this way, the magnet receiving module 1 and the rotor core 8th via the form-locking and counter-form-locking means 10 be positively connected.

13 shows a detailed representation of a recording device 3 in the area of a surface magnet 5 according to another modified embodiment.

It is to a certain extent a shape reversal of the form-fitting and Gegenformschlussmittel the embodiment according to 12 , so that the positive locking means 10 are designed here as feathers with round tip. Accordingly, on a corresponding rotor core 8th Grooves for receiving the positive locking means 10 provided to the magnet receiving module 1 positive fit with the rotor core 8th connect to.

14 shows a magnetic receiving module 1 according to a further embodiment.

This embodiment of the magnetic receiving module 1 differs from the embodiments described above in that the receiving device 3 one the front side 15 the magnets 5 at least partially covering stop 16 having. The magnets are advantageous in this way 5 axially secured.

The stop 16 is or becomes integral with the rest of the receiving device 3 produced. For example, an injection mold for producing the receiving device 3 already the one for the attack 16 have provided form with. This is possible regardless of whether it is an individually prepared in advance recording device 3A or one by encapsulating the magnets 5 produced receiving device 3B is.

The front side 15 the magnets 5 may only partially or completely by the stop 16 be covered. In the illustrated embodiment, the stop 16 as a circumferential ring on the front side 15 the one for the magnets 5 provided recesses arranged which the magnets 5 partially covers the front side and thus provides an axial securing.

15 shows a magnetic receiving module 1 according to yet another embodiment with wrapping 17 ,

The serving 17 is made of an amagnetic material, such as stainless steel, and serves to mechanically stiffen the receiving device 3 , In particular, if the with the magnetic recording module 1 Rotor to be manufactured 2 is intended for high speeds, such a stiffening helps even at high speeds, the dimensional stability and mechanical stability of the rotor 2 to keep and in particular to avoid the undesirable formation of centrifugal columns.

In the illustrated embodiment, the envelope is hollow cylinder or sleeve-shaped. Of course, however, are adapted to the outer shape of the receiving device 3 different circumferential shapes, for example, also polygonal shapes, conceivable.

16 shows a magnetic receiving module 1 according to a further embodiment with wrapping 17 ,

In this embodiment, the envelope 17 in addition to its mechanical stiffening function also for the axial securing of the magnets 5 used. It is thus a functionally integral component.

The axial securing is achieved by the wrapping 17 is provided on its front side circumferentially with regular notches, which the front of the enclosure 17 in a variety of tabs 18 divide. These tabs 18 are bent radially inward by 90 °, thus supporting the magnets 5 at the front side 15 End face, ie, axially, from.

The serving 17 according to 15 or 16 Can either be retrofitted to the outside 6 of the magnetic recording module 1 or its receiving device 3 be pushed axially.

Alternatively, the receiving device 3 also directly by injecting into the enclosure 17 be prepared so that it is at the wrapping 17 and the receiving device 3 is a common component, in particular with different material components.

The tabs 18 are preferably only after the insertion or insertion of the magnets 5 bent.

In an embodiment in which the receiving device 3 an encapsulation of the magnets 5 represents, but is also the arrangement of the magnets 5 in the serving 17 with already bent tabs 18 and a subsequent encapsulation conceivable.

17A shows a rotor according to another embodiment with enclosure 17 ,

It is a perspective view of a rotor 2 with serving 17 , The enclosure also non-magnetic, in particular made of stainless steel, and has similar to the embodiment according to 16 front flaps 18 on.

In the state shown here is a not yet attached state of the enclosure 17 in which the tabs 18 not yet bent over.

The rotor core 8th shows as a further difference from the preceding embodiments on its radially outer side 11 at the contact surfaces of the magnets 5 provided axial ribs 19 on, with the magnets 5 provided with correspondingly formed grooves. In this way, an additional radial securing of the magnets 5 and thus the entire magnetic recording module 1 opposite the rotor core 8th provided.

If it is the recording device 3 is an externally produced recording device can, through the not yet bent tabs 18 the magnets 5 subsequently, ie after the axial mounting of the magnet receiving module 1 on the rotor core, in the recesses 4 inserted and then by bending the tabs 18 secured axially.

If it is the recording device 3 an encapsulation of the magnets 5 the cladding can act 17 only later, ie after the axial mounting of the magnet receiving module 1 on the rotor core 8th , are pushed onto the outside of the magnet receiving module. Then then the envelope 17 be secured axially by bending the tabs.

In the illustrated embodiment, the tabs are always after the application of the envelope 17 on the rotor core 8th bent. This is due to the fact that the tabs 18 Here also an additional function of the axial securing of the entire magnetic recording module 1 on the rotor core 18 due. The tabs 18 are accordingly designed to extend over the entire face 15 the magnets 5 beyond the radial outer surface 11 of the rotor package 8th extending edge forming.

17B shows the rotor according to 17A with reshaped cladding 17 ,

Visible extend the tabs 18 here at the front 15 about the magnets 5 away and partly to over the rotor core 8th , Thus, both the magnets 5 as well as the entire magnetic recording module 1 axially on the rotor core 8th secured, so the rotor 2 is completely assembled.

In this embodiment, thus advantageously simultaneously an axial securing of the magnets 5 as well as the entire magnetic recording module 1 through the serving 17 provided.

Although the present invention has been fully described above with reference to preferred embodiments, it is not limited thereto but is modifiable in a variety of ways.

For example, the principle according to the invention can also be applied to external rotors.

LIST OF REFERENCE NUMBERS

1, 1A, 1B

Magnetic recording module

2, 2A, 2B

rotor

3, 3A, 3B

recording device

4

recess

5

surface magnet

6

peripheral surface

7

radially inner side

8th

Laminated core

9

intermediate area

10

Fit means

11

radial outside

12

circumferential arrangement

13

Bracket projection

14

material thickness

15

front

16

attack

17

wrapping

18

flap

19

rib

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

• DE 102015206100 [0005]

Claims (15)

Magnetic recording module (1, 1A) for a rotor (2, 2A, 2B) of an electric machine, with a circumferentially formed non-magnetic recording device (3, 3A), with a plurality of recesses (4) for receiving surface magnets (5), which are provided in a circumferential arrangement, wherein the receiving device (3, 3A) the recesses (4) on a radially outer peripheral surface (6) of the magnetic receiving module (1, 1A) surrounds, and wherein the recesses (4) are designed to be open on a radially inner side (7) of the magnetic receiving module (1, 1A) so that surface magnets (5) can be accommodated freely on the radially inner side (7). Magnetic recording module (1, 1B) for a rotor (2, 2B) of an electrical machine, with a plurality of surface magnets (5), which are provided in a circumferential arrangement (12), with a circumferentially formed non-magnetic recording device (3, 3B), in which the surface magnets (5) are firmly received, wherein the receiving means (3B) the surface magnets (5) on a radially outer peripheral surface (6) of the magnetic receiving module (1, 1B) surrounds , and wherein the surface magnets (5) are exposed on a radially inner side (7) of the magnetic receiving module (1, 1B). Magnetic recording module after Claim 2 , characterized in that the receiving device (3B) is formed as encapsulation of the surface magnets (5). Magnetic recording module according to one of the preceding claims, characterized in that the receiving device (3A, 3B) on the radially inner side (7) of the magnetic receiving module (1A, 1B) is undercut-free in at least one axial direction, so that an assembly of the magnetic receiving module (1A, 1B ) on a rotor core (8) by sliding and / or shrinking is possible. Magnetic recording module after Claim 4 , characterized in that the receiving device (3A, 3B) arranged in an intermediate region (9) between two recesses (4) or surface magnet (5), in particular integrally formed with the receiving device (3A, 3B), positive locking means (10) for securing Magnetic recording module (1A, 1B). A rotor (12) for an electric machine, comprising a magnet receiving module (1A, 1B) according to any one of the preceding claims, comprising a rotor lamination stack (8) on a radially outer side (11) to the radially inner side (7) of the magnet receiving module (11). 1A, 1B), which is designed such that the magnetic receiving module (1A, 1B) can be mounted axially on the rotor laminated core (8). Rotor after Claim 6 , characterized in that the radial outer side (11) of the rotor laminated core (8) is undercut-free in at least one axial direction. Rotor after Claim 6 or 7 , characterized in that the magnetic receiving module (1A, 1B) according to Claim 5 is formed and the rotor laminated core (8) to the positive locking means (10) corresponding Gegenformschlussmittel, wherein the magnetic receiving module (1A, 1B) via the positive locking and Gegenformschlussmittel (10) with the rotor core (8) is positively connected. Rotor after one of Claims 6 to 8th , characterized in that the magnetic receiving module (1A, 1B) is non-positively connected to the rotor laminated core (8). Rotor after one of Claims 6 to 9 , characterized in that the surface magnets (5) directly on the rotor core (8) rest and are contacted. Method for producing a magnetic receiving module (1B) for a rotor (2B) of an electrical machine, in particular a magnetic receiving module (1B) according to FIG Claim 3 method comprising the steps of: positioning a plurality of surface magnets (5) in a circumferential array (12); and overmolding the surface magnets (5) such that the overmoulding surrounds the surface magnets (5) on a radially outer peripheral surface (6) which firmly receives surface magnets (5) and leaves them exposed on a radially inner side (7). Method for producing a rotor (2A, 2B) for an electric machine, in particular a rotor according to one of the Claims 6 to 10 , comprising the steps of: providing a magnetic recording module (1A; 1B), in particular a magnetic recording module according to one of the Claims 1 to 5 or prepared according to a method according to Claim 11 ; Providing a rotor lamination stack (8) having on a radial outer side (11) a corresponding to a radially inner side (7) of the magnet receiving module (1A, 1B) form, and Axial mounting the magnet receiving module (1A, 1B) on the rotor lamination stack (8 ). Method according to Claim 12 , characterized in that a magnetic receiving module (1A) according to Claim 1 is provided and before mounting surface magnets (5) are introduced into the recesses (4), which are contacted in the assembly with the rotor core (8). Method according to Claim 12 , characterized in that a magnetic receiving module (1A) according to Claim 1 is provided and after mounting surface magnets (5) introduced into the recesses (4) and thereby contacted with the rotor core (8). Method according to Claim 12 , characterized in that a magnetic receiving module (1B) according to Claim 2 or 3 is provided and the surface magnets (5) are contacted during mounting with the rotor core (8).

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