Laminated rotor core for rotor and method for manufacturing laminated rotor core

Abstract

The invention relates to a laminated rotor core for a rotor and a method for manufacturing the laminated rotor core. The laminated rotor core (1) comprises a plurality of stacked lamination rings (10), each lamination ring (10) comprising a plurality of ring segments (12). Each annular section (12) has a plurality of receiving openings (20) for the permanent magnets, which are arranged in pairs in a V-shape with respect to one another, and a plurality of channels (22) for the respective fastening means (23). The laminated rotor core (1) is mounted on the holding disc (10) using fixing means (23) which extend in the channels (22) of the laminated rotor core (1).

Description

[0001] This application is a divisional application of the invention patent application "Laminated rotor core for rotor and method for manufacturing laminated rotor core" with national application number 202080060622.7 (PCT application number PCT / DE2020 / 100601) filed on July 9, 2020. Technical Field

[0002] The invention relates to a laminated rotor core for a rotor of a permanent magnet electric machine. The laminated rotor core comprises a large number of laminated rings. Each of the laminated rings comprises a plurality of annular segments. Each of the annular segments has a first end face with a connection system and a second end face with a complementary connection system in the circumferential direction.

[0003] The invention also relates to a method for producing a laminated rotor core for a rotor of a permanently excited electrical machine. Background Art

[0004] Published German patent application DE 10 2009 052 596 A1 relates to a rotor for an electric machine, which is formed by individual segments. Each individual segment has a first part, which is connected to a second corresponding part of an adjacent individual segment in a form-fitting manner in the assembled state, so that a self-supporting ring structure of the assembled rotor is formed in the circumferential direction. Each individual segment has an opening for a permanent magnet.

[0005] Published German patent application DE 10 2010 005 490 A1 discloses a rotor for an electric machine having individual segments and a rotor carrier. The individual segments are connected to the rotor carrier in a form-fitting manner.

[0006] The published German patent application DE 10 2011 018 619 A1 relates to a laminated core arrangement for a rotor of a permanent magnet synchronous machine for an electric machine, in particular a vehicle, having a plurality of laminated core layers stacked one on top of the other. Each laminated core layer comprises at least two laminated core parts in the shape of an annular segment, which are each connected to one another in the circumferential direction via an end face by means of a connecting device. The individual laminated core layers of the laminated core arrangement can be connected by riveting or screwing.

[0007] The published German patent application DE 10 2011 115 159 A1 relates to a ring element for an electric machine. A first ring segment and at least one second ring segment are connected to each other to hold at least one magnet of the electric machine. The ring segments are connected to each other by means of the magnets. Furthermore, connecting elements that interact in a form-fitting manner can be formed at the joint of adjacent ring segments.

[0008] Published German patent application DE 10 2012 019 182 A1 relates to a connection device for at least one first ring segment of a ring element of an electric machine to at least one second ring segment. In the axial direction, the ring segments are fixed to one another by means of at least one plastic deformation of the ring segments of the ring element.

[0009] Published German patent application DE 10 2013 000 404 A1 relates to a rotor with a split core for an electric motor. The rotor has an annular carrier element and a plurality of shaft segments, which are positioned at regular intervals in the circumferential direction on the carrier element. Each of the plurality of split cores has a hole segment matching each of the shaft segments. By annularly joining the split cores, a substantially annular core is formed. Each split core has a connecting segment at its two circumferential ends, and each connecting segment is configured to be connected to a connecting segment of an adjacent split core.

[0010] Published German patent application DE 10 2013 204 790 A1 discloses a rotor arrangement. The assembly comprises a hub and a rotor core having a first rotor core lamination positioned at least partially around the hub. The first rotor core lamination is at least partially defined by a first section and a second section, the first section and the second section being designed to be connected or interlocked with each other. The first section comprises a protrusion extending from a first body. The protrusion is designed to engage in a corresponding recess in the second section to connect the first section to the second section. At least one first mounting tab extends from the first body and is designed to engage in a corresponding first groove on the outer periphery of the hub to connect the first section to the hub.

[0011] The published German patent application DE 10 2015 206 974 discloses a rotor for an electric machine, which has at least one first rotor segment and at least one second rotor segment. The two rotor segments are connected to each other in a form-fitting manner at the respective end faces, so that an annular rotor can be formed. The first rotor segment and the second rotor segment are connected to a rotor carrier in a form-fitting manner along their inner circumference, wherein the first rotor segment and the second rotor segment each have a plurality of first receiving openings at their inner circumference and can be mounted on the rotor carrier.

[0012] European patent EP 2 466 732 B1 discloses a manufacturing method for a laminated rotor body. The strip-shaped core lamination has a plurality of pole segments protruding radially outward. Each strip-shaped core lamination is bent into a spiral shape around the annular forming segment. The strip-shaped core laminations are stacked one on top of the other so that the pole segments are aligned with each other.

[0013] Published German patent application DE 10 2017 2014 38 discloses a laminated core disc for a rotor of an electric machine. The laminated core disc comprises a plurality of laminated core disc segments, wherein each laminated core disc segment has a connecting element at a first distal end and a matching connecting element at a second distal end opposite to the first distal end, the matching connecting element being used for positively connecting with a connecting element of another laminated disc segment to produce a laminated core disc. Magnet receiving recesses are formed on the end faces of the two distal ends of each laminated core disc segment, the magnet receiving recesses being used to form magnet receiving pockets for receiving magnets.

[0014] Published Japanese patent application JP 2012-019623 A1 relates to a rotor core in which a plurality of segment parts are coupled by means of a form-fit connection to form a ring. The rotor core is constructed by laminating a plurality of segment parts. A plurality of permanent magnets are embedded to extend in the lamination direction of the core piece so that the magnets are arranged at intervals in the circumferential direction.

[0015] Chinese utility model CN ​​207939332 U discloses an electric motor. A rotor core is mounted on a rotating shaft. The imbalance of the motor can be compensated via an injection opening.

[0016] Chinese utility model CN ​​207339463 U discloses a permanent magnet rotor.

[0017] Japanese patent application JP H08168222 discloses a rotor for a synchronous motor. The rotor includes a large number of permanent magnets arranged in the circumferential direction of the rotor shaft. A large number of core elements hold each permanent magnet between the core elements in the circumferential direction.

[0018] DE 50 2016 003 319 T1, the German translation of European patent EP 3 306 786 B1, discloses an electric motor. The rotor has a rotor shaft, on which a rotor stack is fitted and connected in a non-rotatable manner. The rotor stack comprises rotor segments stacked one on top of the other in the axial direction and a centering disk and a press-fit connection. The stack formed by the rotor segments is arranged between the centering disk and the press-fit connection.

[0019] According to the prior art, the individual laminations of one or more rotor stacks are designed as solid rings due to assembly methods such as lateral interference fit, screwing, riveting, etc. However, this means that there is a very high stamping waste during the manufacturing of these individual laminations. Summary of the invention

[0020] The object of the present invention is therefore to create a laminated rotor core for a rotor of a permanently excited electrical machine which can be manufactured in a resource-saving manner, is easy to assemble, requires a reduced number of different parts and ensures operational reliability of the rotor.

[0021] This object is achieved by a laminated rotor core for a rotor of a permanently excited electrical machine comprising the features of claim 1 .

[0022] Another object of the present invention is to provide a method for manufacturing a laminated rotor core for a rotor of a permanently excited electrical machine, which method is achieved by reducing the number of different parts and simplifies the manufacturing process for the rotor.

[0023] This object is achieved by a method for producing a laminated rotor core for a rotor of a permanently excited electrical machine comprising the features of claim 8 .

[0024] A possible embodiment of the laminated rotor core for a rotor of a permanently excited electric machine according to the invention is characterized in that each annular segment has a plurality of receiving openings for permanent magnets, which are arranged in pairs and in a V-shaped manner relative to each other and are punched out or cut out. In addition, a plurality of channels are formed, wherein a fixing device of the laminated rotor core is guided in each of the channels. The receiving openings for the permanent magnets and the plurality of channels for the fixing devices are arranged symmetrically around the center axis of the annular segment and are arranged uniformly along the arc length of the annular segment. The number of paired receiving openings is greater than the number of channels.

[0025] The greatest advantages are provided by the additional segments of the rotor laminations of the laminated rotor core in combination with fixing means which are guided through the corresponding channels of the laminated rotor core. Fixing means, such as screws or rivets, are preferred. These improvements are evenly distributed radially in the segments according to the number of pole pairs to be received in the laminated rotor core and the number of screws to be used. This enables a significantly higher utilization of the stamped metal sheets. Since all segments consist of geometrically identical stamped parts, each of the segments can be installed at any position in the laminated rotor core. This simplifies handling and logistics.

[0026] According to an advantageous embodiment, the first connection system is formed with a first connection element, a second connection element and a third connection element which are different in shape. The second connection system is formed with a first complementary connection element, a second complementary connection element and a third complementary connection element which are different in shape. In order to connect the individual segments into a closed annular ring, the first connection element interacts with the first complementary connection element of the subsequent annular segment in a form-fitting manner, the second connection element interacts with the second complementary connection element of the subsequent annular segment in a form-fitting manner, and the third connection element interacts with the third complementary connection element of the subsequent annular segment in a form-fitting manner.

[0027] According to a possible embodiment of the stacked lamination ring comprising annular segments, the channels in the laminated rotor core are arranged such that the channels are aligned and the fixing means extend in each of the channels of the laminated rotor core.The fixing means may all be fixed to a retaining disc for the laminated rotor core.

[0028] By using fixing by means of screws or rivets, full rings (continuous lamination rings) are no longer necessary. The segments of the laminated rotor core (rotor stack) offer the greatest advantages in combination with the screw connections or riveting described above. The improvements depend on the number of pole pairs and screws or rivets to be used per segment. The screws or rivets are evenly distributed in the radial direction and ensure a significantly higher utilization of the sheet metal from which the individual segments are punched out. Since all segments consist of geometrically identical punched parts, the segments can be mounted as desired and can be mounted at any position in the rotor, which simplifies handling and logistics.

[0029] According to a possible embodiment of the present invention, the lamination rings including the annular segments are stacked individually or in groups such that the joints of the lamination rings are aligned in the direction of the axis of the laminated rotor core.

[0030] According to another possible embodiment of the present invention, the laminated rings including the annular segments are stacked such that the joints of all the laminated rings are offset from each other by half the angular amount of the annular segments.

[0031] According to yet another embodiment of the invention, the lamination rings comprising annular segments are stacked in groups. In each group, the lamination rings comprising annular segments are arranged so that the joints between the lamination rings are aligned in the direction of the axis of the laminated rotor core. The groups are arranged in the laminated core stack so that the joints in the direction of the axis of the consecutive groups are offset from each other by half the angular amount of the annular segments.

[0032] When stacking lamination rings by individual annular segments, as described above, there are various possible concepts (end to end, or alternating segments), for example. Connecting the individual segments to form lamination rings can be done, for example, in a form-fitting manner. The position of the individual segment levels can be changed after each individual laminated core layer so that the joints are distributed in the best possible way, which requires a high level of processing work. An alternative embodiment is to stack a certain number of segmented lamination rings into a group. The resulting segmented lamination ring group (multiple individual lamination rings) can be rotated relative to the subsequent group. The joint does not rotate within the individual lamination rings of the group, but a good compromise is formed between processing and minimizing losses.

[0033] According to a possible embodiment of the segmented laminated ring of the present invention, the segmented laminated ring may include three segments or five segments. The number of segments of each laminated ring essentially depends on the number of channels per segment and the number of receiving openings for permanent magnets. In addition, the number of channels and the number of receiving openings for permanent magnets should be evenly distributed in the circumferential direction of the segmented laminated ring.

[0034] The core idea of ​​the invention lies in the “key-and-hole connection” (positive-locking connection) of the individual segments in the laminated ring and the rotation of the continuous laminated ring (“masonry” function of the continuous laminated ring).

[0035] According to a possible exemplary embodiment of the invention, the lamination ring can include 3 annular segments of 120 degrees each. In the tool, the individual annular segments are overlapped to form the lamination ring. Then, two consecutive lamination rings are rotated by half the degree of the annular segment. As a result, each individual lamination ring is rotated 60 degrees relative to the adjacent lamination ring or the lamination ring group is rotated 60 degrees relative to each lamination ring group. In this way, the channel for the fixing device and the receiving opening for the permanent magnet are aligned. This rotation creates the "masonry function" mentioned above.

[0036] According to the method for manufacturing a laminated rotor core for a rotor of a permanent magnet motor of the present invention, a plurality of annular and identical segments are first punched out from a metal sheet. Here, each of the annular segments has a connection system on a first end face in a circumferential direction and a complementary connection system on a second end face. Similarly, a plurality of receiving openings for permanent magnets and a plurality of channels for each fixing device are formed on each of the same segments, and the plurality of receiving openings are arranged in pairs in a V-shaped manner relative to each other. A laminated ring can be formed (for example, by overlapping segments) by a plurality of annular and identical segments of a limited number. To this end, the connection system of the first end face of the annular segment interacts with the complementary connection system on the second end face of the subsequent annular segment in a form-fitting manner. The laminated rings completed by the annular segments are stacked so that the receiving openings for the permanent magnets and the channels of the fixing devices for all the laminated rings stacked in the laminated rotor core are aligned. According to a possible embodiment, the laminated rotor core can be fixed to the retaining disk by each fixing device passing through one of the channels of the laminated rotor core.

[0037] The method according to the invention has the advantage that a completely cylindrical rotor carrier is not required for fixing (screwing or riveting) the laminated rotor core. It is sufficient if only one centering seat is formed for the laminated rotor core. The centering can also be completely performed during the assembly of the laminated rotor core using suitable tools.

[0038] Another embodiment could be to completely dispense with the rotor carrier as a tubular carrier element and to fasten the laminated rotor core to a retaining disk. Other parts of the hybrid module can also be attached to the retaining disk. The retaining disk can also be used as a pressure plate for the clutch. This increases the proportion of functional integration and the open radial installation space can be used to increase the torque of the electric machine.

[0039] Another advantage of the method according to the invention is the deformation of the component, which is caused only by centrifugal forces. The screw connection / riveting fastening method does not cause any deformation, which is also the case with a lateral interference fit. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] With reference to the accompanying drawings, the invention and its advantages will now be explained in more detail by means of exemplary embodiments, without thereby limiting the invention to the exemplary embodiments shown. The scales in the figures do not always correspond to the true scale, since for a better illustration some shapes are simplified and other shapes are shown enlarged relative to other elements.

[0041] FIG. 1 shows a plan view of a metal sheet from which lamination rings are punched for laminating a rotor core according to the prior art.

[0042] FIG. 2 shows a side view of a laminated rotor core formed from a plurality of lamination rings of FIG. 1 .

[0043] Figure 3 A schematic plan view of a lamination ring formed from a plurality of annular segments is shown.

[0044] Figure 4 A schematic plan view of a metal sheet is shown; according to the present invention, Figure 3 The annular section of the laminated ring is punched out of the metal sheet.

[0045] Figure 5 A plan view of a laminated ring according to the invention is shown, which is formed from a plurality of annular segments.

[0046] Figure 6 A perspective view of a lamination ring formed from a plurality of annular segments according to the invention is shown.

[0047] Figure 7 A plan view of a ring segment according to the invention is shown.

[0048] Figure 8 shows a side view of a laminated rotor core, which, according to one embodiment, is composed of Figure 5 It is formed by a plurality of segmented lamination rings.

[0049] Fig. 9 shows a side view of a laminated rotor core, which, according to another embodiment, consists of Figure 5 It is formed by a plurality of segmented lamination rings.

[0050] Fig.10 A perspective view of an assembled laminated rotor core is shown.

[0051] Fig.11 A cross-sectional view of an assembled laminated rotor core is shown.

[0052] Fig.12 Shows Fig.11 A stereoscopic view of the assembled laminated rotor core.

[0053] The same reference numerals are used for the same or equivalent elements in the present invention. In addition, for the sake of clarity, only the reference numerals necessary for the description of the corresponding figures are shown in each figure. The accompanying drawings represent only exemplary embodiments of the present invention, but do not limit the present invention to the exemplary embodiments shown. DETAILED DESCRIPTION

[0054] FIG1 shows a plan view of a metal sheet 9 from which lamination rings 10 are punched out according to the prior art for removing a laminated rotor core 1. In FIG2 , a side view of a laminated rotor core 1 is shown, which is formed from a plurality of lamination rings 10 according to the prior art. Due to assembly conditions, such as, for example, lateral interference fits, screw connections, riveting, etc., the lamination rings 10 of the laminated rotor core 1 are designed as full rings. However, this means that there is a very high stamping waste during the production of these full rings (individual cores).

[0055] Figure 3 A schematic plan view of a lamination ring 10 formed from a plurality of annular ring segments 12 is shown. Figure 4 A schematic plan view of a metal sheet 9 is shown, which is used according to the present invention. Figure 3 The annular ring segments 12 of the laminated ring 10 are punched out of the metal sheet. All of the punched out annular ring segments 12 are identical. The laminated ring 10 is produced from the annular ring segments 12. The arrangement of the annular ring segments 12 enables significantly higher utilization of the metal sheet 9. For example, a punching tool (not shown) with multiple cavities can be used, or the metal sheet 9 can be moved under the punching tool. All annular ring segments 12 are designed to be identical in geometry.

[0056] Figure 5 A plan view of two lamination rings 10 arranged one above the other is shown, both being formed by a plurality of annular ring segments 12 according to the invention. The plan view shows two segment levels. The annular ring segments 12 of the upper lamination ring 10 are identified by dashed lines. The annular ring segments 12 of the lower lamination ring 10 are identified by dot-dash lines. Channels 22 for fixing devices (not shown here) and receiving openings 20 arranged in pairs for permanent magnets are distributed in a rotationally symmetrical manner on each of the lamination rings 10. In the embodiment shown here, each of the lamination rings 10 comprises five annular segments 12. The upper lamination ring 10 is rotated relative to the lower lamination ring 10 by half the angular range (arc length B) of the annular segments 12. From Figure 5 , it can be clearly seen that, despite the rotation, the channels 22 of the two lamination rings 10 comprising the stack of annular segments 12 are aligned. Likewise, the receiving openings 20 arranged in pairs for permanent magnets (not shown here) are aligned. By rotating the upper lamination ring 10 relative to the lower lamination ring 10, the joints 25 between the annular segments 12 of the upper lamination ring 10 and between the annular segments 12 of the lower lamination ring 10 are also rotated accordingly.

[0057] Figure 6A perspective view of a laminated ring 10 according to the invention formed of a plurality of annular ring segments 12 is shown. The dashed line marks one of the plurality of annular ring segments 12. Likewise, receiving openings 20 and channels 22 evenly distributed along the circumference of the laminated ring 10 and arranged in pairs can be seen.

[0058] Figure 7 A plan view of a possible embodiment of an annular segment 12 according to the invention is shown. Each annular segment 12 has a first end face 14 with a connection system 4 in the circumferential direction U. The annular segment 12 also has a second end face 16. The first end face 14 has a connection system 4 formed during the stamping process. A connection system 6 complementary to the connection system 4 is formed on the second end face 16, which connection system is also formed during the stamping process.

[0059] In the embodiment shown here, which should not be understood as a limitation of the present invention, the first connection system 4 comprises a first connection element 51, a second connection element 52 and a third connection element 53 which are different in their shapes. The second connection system 6 comprises a first complementary connection element 71, a second complementary connection element 72 and a third complementary connection element 73 which are also different in their shapes. The first connection element 51 interacts with the first complementary connection element 71 of the subsequent annular segment 12 in a form-fitting manner. The second connection element 52 interacts with the second complementary connection element 72 of the subsequent annular segment 12 in a form-fitting manner. The third connection element 53 interacts with the third complementary connection element 73 of the subsequent annular segment 12 in a form-fitting manner.

[0060] Each of the annular segments 12 is formed with a punched receiving opening 20 and a plurality of channels 22 for permanent magnets, which are arranged symmetrically around the central axis M of the annular segment 12. In addition, the receiving opening 20 and the plurality of channels 22 for permanent magnets are evenly arranged along the arc length B of the annular segment 12.

[0061] Figure 8 shows a side view of a laminated rotor core 1, which, according to one embodiment, consists of Figure 5 The laminated rings 10 including the individual annular segments 12 assembled according to the present invention are stacked individually or in groups so that the joints 25 of all the laminated rings 10 are aligned in the direction of the axis A of the laminated rotor core 1 .

[0062] Fig. 9 shows a side view of a laminated rotor core 1, which, according to another embodiment, consists of Figure 5The lamination rings 10 are formed by a plurality of segmented lamination rings 10. The lamination rings 10 including the annular segments 12 can be stacked individually or in groups. In the embodiment shown here, the lamination rings 10 are stacked so that the joints 25 of all the lamination rings 10 of the laminated rotor core are offset from each other by half the angular amount of the annular segments 12.

[0063] Fig.10 1 shows a perspective view of an assembled laminated rotor core 1. In the embodiment shown here, screws are used as fixing means 23 to fix the laminated rotor core 1 including the annular segment 12 (see Figure 7 ) is fixed to the retaining disk 11. By using screw connections or rivets, the laminated ring 10 can be used, which includes an annular segment 12 (see Figure 7 ) of the laminated rings 10. The individual laminated rings 10 can be stacked using a cylindrical rotor carrier 30 which only provides a centering seat for the laminated rings 10. Therefore, a completely cylindrical rotor carrier 30 is no longer required for the assembly of the laminated rings 10. As described above, the individual laminated rings 10 are stacked so that the channels 22 for the fixing devices 23 and the receiving openings 20 for the permanent magnets are aligned over the entire axial length of the laminated rotor core 1.

[0064] Fig.11 shows a cross-sectional view of the assembled laminated rotor core 1, and Fig.12 Shows Fig.11 A perspective view of the assembled laminated rotor core 1. Fig.11 and Fig.12 In the embodiment shown in FIG. 1 , the rotor carrier 30 as a tubular carrier element can be completely omitted and the laminated rotor core 1 is fastened to the retaining disk 11 . Fig.11 It can be seen that the fixing means 23 are designed as screws. The screws 23 extend in the channels 22 of the stacked lamination rings 10 and interact with the retaining disks 11 to fix the laminated rotor core 1 .

[0065] It is believed that the present disclosure and the many advantages pointed out in the present disclosure will be understood from the foregoing description. It will be apparent that various modifications may be made to the shape, structure and arrangement of the components without departing from the disclosed subject matter. The described forms are merely illustrative and it is intended that the appended claims encompass and incorporate such modifications. Therefore, the scope of the present invention shall be limited only by the appended claims.

[0066] Description of Reference Numerals

[0067] 1 Laminated rotor core

[0068] 4 Connecting the system

[0069] 51 First connecting element

[0070] 52 Second connecting element

[0071] 53 Third connecting element

[0072] 6 Complementary connection systems

[0073] 71 first complementary connecting element

[0074] 72 Second complementary connecting element

[0075] 73 Third complementary connecting element

[0076] 9 Metal sheets

[0077] 10 Laminated Rings

[0078] 11. Keep the disk

[0079] 12 Ring sections

[0080] 14 First end face

[0081] 16 Second end face

[0082] 20 Receiving opening for permanent magnet

[0083] 22 channels

[0084] 23 Fixtures

[0085] 25 Joint

[0086] 30 Rotor carrier

[0087] A axis

[0088] B Arc length

[0089] M Center axis

[0090] U Circumferential direction.

Claims

1. A method for producing a laminated rotor core (1) for a rotor of a permanently excited electric machine, the method comprising the following steps: - punching out a plurality of annular and identical segments (12) from a metal sheet (9), so that each of the annular segments (12) is formed with a connection system (4) on a first end face (14) in a circumferential direction (U) and with a complementary connection system (6) on a second end face (16), each annular segment being formed with a plurality of receiving openings (20) for permanent magnets and a plurality of channels (22) for fixing means (23), the receiving openings being arranged in pairs and in a V-shaped manner relative to one another, wherein in each annular segment the number of pairs of receiving openings (20) is greater than the number of channels (22); - forming a laminated ring (10) from a defined number of annular and identical segments (12), wherein the connection system (4) of the first end face (14) of the annular segment (12) interacts in a form-fitting manner with the complementary connection system (6) on the second end face (16) of the subsequent annular segment (12); - stacking the laminated rings (10) completed by the annular segments (12) in such a way that the receiving openings (20) for the permanent magnets and the channels (22) of the fixing device (23) for all the laminated rings (10) stacked in the laminated rotor core (1) are aligned; and - The laminated rotor core (1) is fixed to a retaining disk (11) by means of fixing means (23) which pass in each case through one of the channels (22) of the laminated rotor core (1).

2. The method according to claim 1, wherein: The lamination rings (10) including the annular segments (12) are stacked individually or in groups so that the joints (25) of the lamination rings (10) of the laminated rotor core (1) are aligned in the direction of the axis (A) of the laminated rotor core (1).

3. The method according to claim 1, wherein: The lamination rings (10) including the annular segments (12) are stacked individually or in groups so that the joints (25) of all lamination rings (10) of the laminated rotor core (1) or the joints (25) of the group are offset from each other by half the angular amount of the annular segments (12).

4. A laminated rotor core (1) manufactured using the method for manufacturing a laminated rotor core (1) for a rotor of a permanent magnet motor according to any one of claims 1 to 3, wherein: The laminated rotor core (1) comprises a plurality of lamination rings (10), each of the lamination rings (10) comprising a plurality of annular segments (12), and each of the annular segments (12) having, in a circumferential direction (U), a first end face (14) with a connection system (4) and a second end face (16) with a complementary connection system (6); It is characterized in that Each annular segment (12) has a plurality of receiving openings (20) for permanent magnets, the receiving openings being arranged in pairs in a V-shaped manner relative to one another; and A plurality of channels (22) are provided, each of which is used for a fixing device (23) of the laminated rotor core (1), wherein the receiving opening (20) for the permanent magnet and the plurality of channels (22) are symmetrically arranged around the central axis (M) of the annular segment (12) and uniformly arranged along the arc length (B) of the annular segment (12), and in each annular segment the number of pairs of the receiving openings (20) is greater than the number of the channels (22).

5. The laminated rotor core (1) according to claim 4, wherein: The first connection system (4) is formed with a first connection element (51), a second connection element (52) and a third connection element (53) of different shapes, and the second complementary connection system (6) is formed with a first complementary connection element (71), a second complementary connection element (72) and a third complementary connection element (73) of different shapes, and the first connection element (51) interacts with the first complementary connection element (71) of the subsequent annular segment (12) in a shape-fitting manner, the second connection element (52) interacts with the second complementary connection element (72) of the subsequent annular segment (12) in a shape-fitting manner, and the third connection element (53) interacts with the third complementary connection element (73) of the subsequent annular segment (12) in a shape-fitting manner.

6. Laminated rotor core (1) for a rotor according to one of the preceding claims 4 and 5, wherein: The channels (22) of the stacked lamination rings (10) comprising the annular segments (12) are aligned and corresponding fixing devices (23) extend through each of the channels (22) of the laminated rotor core (1), all of the fixing devices being fixed to a retaining disk (11) for the laminated rotor core (1).

7. The laminated rotor core (1) for a rotor according to claim 6, wherein: The fixing device (23) is a screw or a rivet.

8. Laminated rotor core (1) for a rotor according to one of the preceding claims, wherein: The lamination rings (10) including the annular segments (12) are stacked individually or in groups such that the joints (25) of the lamination rings (10) are aligned in the direction of the axis (A) of the laminated rotor core (1).

9. The laminated rotor core (1) for a rotor according to one of the preceding claims 4 to 7, wherein: The lamination rings (10) including the annular segments (12) are stacked individually or in groups so that the joints (25) of all lamination rings (10) of the laminated rotor core (1) or the joints (25) of the group are offset from each other by half the angular amount of the annular segments (12).

10. Laminated rotor core (1) for a rotor according to one of the preceding claims, wherein: Each lamination ring (10) of the laminated rotor core (1) comprises three segments (12) or five segments (12).

Images