Rotor of electric machine
By designing multiple magnetic bags in the motor rotor and arranging the magnets at helical angles, the problems of high reinforcement cost and unstable operation of the existing motor rotor are solved, and efficient and stable motor operation is achieved.
Patent Information
- Application Number
- CN202410835159.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2023-06-26
- Filing Date
- 2024-06-26
- Publication Date
- 2024-12-27
AI Technical Summary
The existing reinforcement methods of motor rotors have high costs, high time consumption, serious modeling restrictions, poor power density and temperature stability, and the magnet arrangement leads to locking torque, affecting operational stability and efficiency.
A motor rotor is designed, which consists of at least two stacked sections, each stacked section comprising a plurality of disks arranged in the axial direction, forming a plurality of magnetic bags, and arranging different types of magnets in the magnetic bags , at least one magnet passes through the boundary plane of the stacking section and is arranged at a helical angle to offset it to achieve the reinforcement and operation stability of the rotor stacking.
Through the spiral angular offset arrangement of the magnet, the rotor reinforcement and running stability are effectively improved, torque fluctuations are reduced, the efficiency and reliability of the motor are improved, and the manufacturing process and assembly are simplified.
Smart Images
Figure CN119209984A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a rotor of an electric machine, wherein the rotor has a rotor stack consisting of at least two stacked sections, and each of the stacked sections comprises a plurality of individual disks arranged next to one another. In addition, a plurality of magnetic pockets are formed in the rotor stack, wherein magnets of at least one magnet type are arranged in the respective magnetic pockets. The magnets of at least one of the magnetic pockets are designed in such a way that at least one stacked section boundary plane of stacked sections abutting against one another is penetrated by magnets of the magnet type. Background Art
[0002] In general, efforts are being made to design electric drives to be more powerful and more reliable, wherein, in particular, the comfort for the occupants of electrically driven motor vehicles should also be increased, especially as the number of electric vehicles continues to grow. In this context, attention should also be paid to the vibration behavior of the electric drive, while ensuring high reliability and increased comfort. In this regard, the following main goals exist: to minimize the risk of damage to the electronic components arranged on the drive due to strong vibrations and to minimize the driving noise of a motor vehicle with a drive that occurs during operation of the drive due to these vibrations. One solution to this is to shift the resonance range of the drive from the relevant speed range that is usually encountered during operation to a non-critical speed or frequency range.
[0003] In order to achieve this, the rotor of the motor forming the drive is usually reinforced, for which a variety of solutions are known. For example, one of these solutions is to cast the rotor by injection molding via a high-rigidity material, such as a thermosetting material. Other solutions also lie in bonding the rotor laminations and / or lamination stacks (Blechpaket) of the rotor, tightening them with screws and / or pins, or placing other elements, such as lock nuts and / or pressure rings, at the shaft of the rotor to achieve the movement of the resonance range by reinforcing the rotor. Combinations of the above solutions are also common. However, all of the above solutions can be considered to have disadvantages. Casting the rotor is a costly and time-consuming additional process, which also places high demands on the shape of the rotor laminations and causes restrictions on the shape. In this way, for example, the helix angle that can be implemented in the rotor is significantly limited. In a similar manner, especially compared with other stacking methods (such as stamping stacking), bonding the rotor laminations is also a solution associated with high additional costs and high time consumption, which also has a negative impact on the stacking factor and power density of the motor, and is also only limited in temperature stability. The tensioning of the rotor by means of screws and / or pins leads to undesired short circuits of the rotor laminations, which results in electromagnetic losses. In addition, due to the high temperature fluctuations that occur during the operation of the motor, the pinned and / or screwed connections tend to loosen, so that the rotor performance deteriorates during the service life of the motor. Solutions using pressure rings and / or lock nuts also have these disadvantages. In addition, when tensioning the rotor laminations by means of pressure rings and / or lock nuts, the forces are only introduced directly into the shaft-hub connection, so that the rotor laminations are only slightly tensioned in the area of the outer diameter.
[0004] In order to solve this problem, other methods are also known from the prior art.
[0005] Thus, DE102019129243A1 results in a rotor for an electric motor having a laminated stack with a magnetic pocket extending in an axial direction. Here, in the corresponding magnetic pocket, an arrangement structure that is partially different in its design is implemented by a plurality of permanent magnets, which are cast in the magnetic pocket via resin. It is described here that when casting the magnetic pocket, a small amount of resin also penetrates between the rotor laminations of the laminated stack, so that the rotor laminations are materially joined to each other. However, due to the mechanical load during operation of the motor, gaps will appear between the rotor laminations because the resin that has entered between the rotor laminations is torn. This leads to an imbalance in the rotor and a reduction in the natural frequency of the rotor, which in turn leads to unwanted noise and vibrations during operation of the rotor or a motor having the rotor. It is configured so that the contact areas of a corresponding pair of adjacent permanent magnets of a first arrangement structure of permanent magnets implemented in a magnetic bag and a second arrangement structure of permanent magnets implemented in another magnetic bag are offset relative to each other, so that when viewed in the axial direction, the contact area of the first arrangement structure is covered by the permanent magnets of the second arrangement structure, and vice versa. In order to achieve this, there are multiple feasible solutions: on the one hand, the permanent magnets of the first arrangement structure and the second arrangement structure can have partially different lengths, or on the other hand, have different lengths and are arranged with different numbers of permanent magnets. In addition, there is also the following feasible solution, namely, the permanent magnets of the first and second arrangements have the same length and are arranged with the same number of permanent magnets, but the arrangement structures in the corresponding magnetic bags are implemented axially offset relative to each other.
[0006] In a similar manner, EP2448094B1 also discloses a rotor of an electric motor having a magnetic pocket formed in the rotor lamination stack, wherein the permanent magnet arrangement structure implemented in the magnetic pocket and the rotor laminations of the lamination stack are bonded to each other via resin. The laminated discs of the lamination stack are grouped into two or three laminated disc blocks, which are stacked on each other by rotating 120 degrees or 180 degrees relative to each other to compensate for the thickness variation of the laminated disc caused by manufacturing. In this way, the tilt error in the lamination stack can be minimized to the greatest extent. In order to avoid the lamination stack blocks from being separated due to cracks that appear and are constructed in the resin due to the load of the lamination stack when the motor is running, it is arranged that the contact area of the permanent magnet implemented in the magnetic pocket and the contact area of the lamination stack block are offset relative to each other. In this way, the corresponding contact area of the lamination stack block is covered by the permanent magnet when viewed in the axial direction. For this purpose, the number and length of the permanent magnets are selected accordingly, but each of the permanent magnets has the same length, while the lengths of the respective laminated core blocks are designed at least in part to differ.
[0007] In addition, DE102012112582A1 also describes a rotor of an electric motor, wherein an arrangement structure consisting of permanent magnets is implemented in a magnetic pocket formed in the rotor lamination stack. Even in these arrangements, it is also provided that the contact areas of a corresponding pair of adjacent permanent magnets of a first arrangement structure of permanent magnets implemented in a magnetic pocket and a second arrangement structure of permanent magnets implemented in another magnetic pocket are constructed offset relative to each other. The arrangement structure here consists of two types of permanent magnets, wherein the length ratio of the permanent magnets is one to two. Here, in order to implement the arrangement structure, it is provided that permanent magnets of the same or different types are introduced into the corresponding magnetic pockets, wherein the permanent magnets are bonded to the magnetic pockets (especially by means of synthetic resin).
[0008] However, the above-mentioned solutions have a disadvantageous arrangement of the magnets which usually leads to a locking torque between the stator and the rotor. Such locking torques are usually undesirable, except, for example, in stepper motors, since they lead to torque ripples of the motor which can be regarded as disadvantageous and the associated running roughness and minimized efficiency and reliability. Summary of the invention
[0009] Against this background, the invention is based on the object of designing a rotor of the type mentioned at the outset in such a way that a reinforcement of the rotor is achieved with minimized torque fluctuations and thus further increased running smoothness as well as efficiency and reliability.
[0010] This object is achieved by means of the rotor according to the invention. The embodiments according to the invention relate to particularly expedient developments of the invention.
[0011] According to the invention, a rotor of an electric machine is therefore provided, in particular also an electric machine having a rotor, wherein the rotor has a rotor core, here respectively a laminated core, which consists of at least two laminated core sections, thus in particular laminated core sections. Each of the laminated core sections here comprises a plurality of individual disks, here in particular laminated disks, arranged next to each other, in particular in the axial direction of the rotor or the rotor core.
[0012] In addition, a plurality of magnetic pockets are formed in the rotor stack, in particular, magnetic pockets extending in the axial direction and / or circumferential direction of the rotor or the rotor stack, respectively, wherein magnets of at least one type of magnet are arranged in the corresponding magnetic pockets. Here, the magnets of at least one magnetic pocket are implemented in particular in terms of shape, number and / or arrangement so that at least one stack segment boundary plane of the stack segments abutting against each other is passed through or covered by magnets of at least one, but preferably only one, type of magnet. Therefore, the ends of the magnets passing through such a stack segment boundary plane and / or the magnet boundary planes of each two magnets of these magnets abutting against each other are offset in the axial direction of the rotor and / or the rotor stack relative to the stack segment boundary planes passed through. Therefore, two stack segments abutting against each other are fixed to a certain extent by pins via at least one magnet, but preferably multiple magnets, especially spaced apart in the circumferential direction, which leads to reinforcement of the rotor stack. This reinforcement is carried out in accordance with the configuration of the magnetic pockets—essentially—in the radially outer region of the rotor core, wherein further reinforcement can be carried out by clamping the rotor core at the rotor shaft of the rotor. It is also to be explained that the respective core delimiting planes are respectively spanned by the contact surfaces of two core segments abutting against each other, wherein the contact surfaces are thus part of the core segment delimiting planes. In a preferred embodiment, at least two, particularly preferably all, core segment delimiting planes are also penetrated by magnets of—only—one magnet type.
[0013] Furthermore, according to the invention, the magnetic pocket is constructed by pocket sections of the magnetic pocket which are formed in the stacking section and which pass completely through the stacking section, wherein at least two of the stacking sections are rotated relative to each other at a helical angle. Due to the rotation of the stacking sections, it is possible on the one hand that at least two pocket sections of at least one of the magnetic pockets are also offset relative to each other at a helical angle. However, it is also possible on the other hand that, despite the rotated arrangement of the stacking sections, at least two pocket sections of at least one of the magnetic pockets are still arranged at least partially aligned with each other.
[0014] Furthermore, according to the invention, at least two of the magnets of at least one magnet type of the magnetic pockets are arranged offset relative to one another at a helix angle in at least one of the magnetic pockets. In addition to the reinforcement of the rotor and the increase in running smoothness already associated with this, the running smoothness and efficiency of an electric machine, in particular an electric motor, having a rotor according to the invention is very advantageously further increased by the helical section thus formed in the rotor.
[0015] In an advantageous development, at least, but preferably only, two magnet pocket types, which differ from each other in particular in their geometry, are furthermore formed in the rotor core. Here, magnets of only one or more than one magnet type are implemented in at least one magnet pocket of the respective magnet pocket type. In principle, therefore, at least one magnet type, for example one magnet type or two magnet types, are implemented in each magnet pocket of the respective magnet pocket type. Accordingly, it is provided that at least some of the magnets of at least one magnet type of a magnet pocket implemented in at least one magnet pocket of at least one magnet pocket type are arranged offset relative to each other at a helical angle in a pocket section of the magnet pocket. It is therefore conceivable that, on the one hand, at least some of the magnets of at least one magnet type, which are arranged in magnet pockets of only one magnet pocket type, are offset relative to each other at a helical angle. On the other hand, there is also the possibility that at least some of the magnets of at least one magnet type, which are arranged in magnet pockets of two or more magnet pocket types, are offset relative to each other at a helical angle.
[0016] Here, at least one, preferably only one, of the first magnetic pocket type and at least one, but preferably only two, of the second magnetic pocket type each form a magnetic pocket group, wherein the rotor core has a plurality of magnetic pocket groups of magnetic pocket groups which are in particular designed in the same manner and are spaced uniformly relative to one another in the circumferential direction of the rotor and / or the rotor core. In principle, the magnetic pockets and / or magnetic pocket groups are designed radially on the outside of the rotor core.
[0017] Furthermore, the following improvement of the invention is advantageous in that the rotor stack has at least one stack segment of at least one first stack segment type in which at least, but preferably only, two subsegments of the pocket segment are formed in the corresponding stack segment, which are offset relative to each other by a helical angle. By means of the offset subsegments, it is possible here in a structurally advantageous manner to not only pass through the stack segment boundary plane, but also to arrange the magnets passing through the stack segment boundary plane, especially within the type of magnetic pockets corresponding to the magnetic pockets, offset by a helical angle. By means of the subsegments offset relative to each other by a helical angle, it is possible to compensate for the rotation of the stack segment by a helical angle, so that the pocket segments and / or subsegments formed in the stack segments, especially in successive stack segments, of at least one, preferably only one type of magnetic pocket are oriented in alignment with each other and / or are therefore not offset by a helical angle. In this way, the magnets arranged in one or more magnetic pockets of the relevant magnetic pocket type can pass through the stack segment boundary plane.
[0018] It is also advantageous that the stacking section of the first stacking section type consists of a disk stack of individual disks of two different disk types, in which at least two sub-segments of the pocket section are formed that are offset relative to each other at a helical angle, wherein the sub-segments offset relative to each other at a helical angle, in particular respectively adjacent to each other, are respectively formed in one of the disk stacks. Through this design, the sub-segments offset at a helical angle can be provided in a simple manner in terms of manufacturing technology, wherein the sub-segments can be constructed in particular when stamping the individual disks that form the disk stack. Here, stamping is a manufacturing method that is simple and cost-effective in terms of manufacturing technology. In this way, magnets of the same type of only one type of magnet can also be arranged in the magnetic pocket, wherein the magnets at least partially pass through the stacking section boundary plane, and the corresponding overall arrangement structure of the magnets fills one or more magnetic pockets to a certain extent over its entire length in the axial direction and also on the circumferential side. In this way, the existing volume or existing iron length of the magnetic pocket is optimally utilized.
[0019] In an advantageous embodiment of the invention, it is further provided that a first relative position of a first magnet opening of a first magnetic pocket type formed in an individual disk of a first disk type, forming a first subsection of a first pocket section, relative to a second magnet opening of a second magnetic pocket type formed in the individual disk, forming a second pocket section, and a second relative position of a first magnet opening of a first magnetic pocket type formed in an individual disk of a second disk type, forming a second subsection of a first pocket section, relative to a second magnet opening of a second magnetic pocket type formed in the individual disk, forming a second pocket section, are implemented offset relative to one another by a helical angle. Thus, a stack of disks of individual disks of the first and second disk types is advantageously provided with a stack section of a first stack section type, in which at least two subsections of a pocket section are formed in each case offset relative to one another by a helical angle. The offset of the subsections within such a stack section is hereby produced by arranging a disk stack consisting of corresponding individual disks of different individual disk types next to one another. In the corresponding disk stack, the individual disks are oriented relative to one another in such a way that the corresponding magnet openings of the magnetic pocket type are aligned with one another and thus form a continuous subsection of a pocket section of the corresponding magnetic pocket type. However, the disk stack consisting of the individual disks of the corresponding disk type and thus also the individual disks themselves are oriented relative to one another in such a way that the magnet openings of the second magnetic pocket type are aligned with one another over the entire pocket section formed in the stack section of the first stack section type and thus a continuous pocket section of the second magnetic pocket type is present, while the pocket section of the first magnetic pocket type thus has offset subsections.
[0020] Furthermore, it can be considered extremely advantageous if the rotor stack has at least one, in particular a further, second stack segment type or at least one stack segment of a stack segment type that is different from the first stack segment type, in which the stack segment of the stack segment type consists of individual disks of a single disk type. On the one hand, a stack segment of this stack segment type can be combined with a stack segment of a first stack segment type in which subsegments of the pocket segment are formed that are offset relative to one another by a helix angle to form the rotor stack. Preferably, the rotor stack is constructed by an alternating arrangement of stack segments of the second stack segment type and stack segments of the first stack segment type with offset subsegments.
[0021] On the other hand, in another advantageous improvement of the present invention, it is provided that the rotor stack is implemented to be composed only of stack segments of a stack segment type, in particular other stack segments different from the first stack segment type, which are composed of individual disks of a single disk type. As a result, the manufacturing costs for the stack segments of the rotor stack can be minimized advantageously, because, for example, only one punching tool is required for manufacturing a single disk. This is improved in that the magnetic pockets and / or pocket sections of the first magnetic pocket type constructed in the stack segment of the stack segment type are further formed in a curved shape, in particular in a circular arc shape. Advantageously, it can be so that even when the stack segments are arranged at a helical angle relative to each other, at least one magnet, in particular a first magnet type, is also arranged in a magnet pocket, in particular a first magnet pocket type, constructed in the rotor stack. Such a magnet of the first magnet type is also accordingly constructed in a curved shape here, wherein the magnet and the magnetic pocket or pocket section preferably have the same radius of curvature.
[0022] In one embodiment of the invention, it is therefore advantageously provided that at least two pocket segments of the first magnetic pocket type, which are formed in a curved manner and follow one another in the axial direction, overlap only partially in sections in the circumferential direction of the rotor core and / or the rotor, while forming an axially aligned overlapping region of the magnetic pockets of the first magnetic pocket type, wherein magnets of the first magnet type are arranged in the overlapping region of the magnetic pockets, passing through the plane separating the core segments. Thus, in a structurally advantageous and simple manner, it is possible to achieve pinning of the rotor core via magnets arranged in at least one magnetic pocket, preferably of the first magnetic pocket type, wherein the magnets implemented in the magnetic pocket or pockets are arranged aligned with one another and thus, in particular, simplified assembly of the magnets or the rotor can be achieved. Furthermore, despite this, a spiral in the rotor or rotor core can still be achieved, for example, via magnets of a second or third magnet type arranged in the magnetic pockets of the second magnetic pocket type.
[0023] Furthermore, a further development of the rotor according to the invention is advantageous if magnets of at least - but preferably only - two magnet types are arranged in the magnetic pockets of the first magnetic pocket type. In this improvement, the magnets of the - second - magnet type are implemented in such a way that the magnets of the magnet type do not pass through the stack segment boundary plane and are therefore preferably shorter than the corresponding pocket segment in which the magnets are arranged. In this way, the entire volume or the entire iron length provided by the corresponding pocket segment and / or the corresponding magnetic pocket can be utilized in an advantageous manner and the maximum power density and efficiency as well as the running smoothness of the rotor and / or the electric machine having the rotor, in particular an electric motor, can be provided. Here, the axially adjacent magnets of the second magnet type are preferably arranged respectively on the end sides of the pocket segment and / or the magnetic pocket, in particular of the first magnet type.
[0024] In a further advantageous manner, in one embodiment of the invention, magnets of the second magnet type that do not pass through the stack segment boundary plane are arranged adjacent to magnets of the first magnet type that pass through the stack segment boundary plane in a bag segment of the first magnetic bag type in the axial direction or in the circumferential direction. In an extremely advantageous manner, the volume or the total iron length provided by the corresponding bag segments and / or the corresponding magnetic bags can be fully utilized in the case of a rotor stack that has a stack segment of a single stack segment type with different individual disks and bag segments with offset sub-segments. In addition, the volume or the total iron length provided by the corresponding bag segments and / or the corresponding magnetic bags can also be fully utilized in the case of a rotor stack that consists of stack segments of a stack segment type with only identical individual disks. Here, in the embodiment of the rotor laminate with a laminated segment type in which at least two sub-segments of the pocket segment are formed in the laminated segment, which are offset relative to each other by a helix angle, the arrangement of magnets of the second magnet type at the end side of the pocket segment, in particular the first magnet pocket type, and / or at the end side of the magnetic pocket, in particular the first magnet pocket type, is preferred, wherein the magnets of the second magnet type are adjacent to the magnets of the first magnet type in the axial direction. In the embodiment of the rotor laminate with a laminated segment type in which the laminated segment consists of a single disk of a single disk type, in particular with a curved magnet opening of the first magnet pocket type, the magnets of the second magnet type are arranged in the circumferential direction on the magnets of the first magnet type. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] The present invention allows for many embodiments. In order to further illustrate its basic principles, some of the embodiments are shown in the drawings and described below. The drawings show:
[0026] Figure 1a , Figure 1b A first embodiment of a rotor is shown;
[0027] Figure 2a , Figure 2b A single disk is shown in a stacked segment format;
[0028] Figure 3 A second embodiment of the rotor is shown;
[0029] Figure 4 A third embodiment of a rotor is shown;
[0030] Figure 5 A detailed view showing a laminated rotor core of a third embodiment;
[0031] Figure 6 A single disk in the form of a stack segment of a third embodiment is shown. DETAILED DESCRIPTION
[0032] Figure 1a and Figure 1b A first embodiment of a rotor 1 of an electric machine according to the invention, not shown in greater detail, is shown, wherein the rotor 1 is Figure 1a is shown in perspective in Figure 1b . The rotor 1 has a rotor laminate 2 arranged on a rotor shaft 26 of the rotor 1, which consists of a plurality of, in particular four, laminate segments 3, wherein each of the laminate segments 3 comprises a plurality of individual disks 4 arranged next to one another, and between the laminate segments 3 there are respectively laminate segment boundary planes 10. In this case, two of the laminate segments 3 belong on the one hand to a first laminate segment type 15 and on the other hand to a second laminate segment type 16, wherein the laminate segments 3 of different laminate segment types 15, 16 are arranged alternately on the rotor shaft 26 in an axial direction 23. In this case, the laminate segments 3 that follow one another in the axial direction 23 are arranged rotated relative to one another at a helix angle 12 in the rotor 1 in order to form a spiral. This can be seen in particular from Figure 1a Conclude.
[0033] Furthermore, a plurality of magnet pockets 5 of two different magnet pocket types 13, 14 are formed in the radial outer region of the rotor laminate 2, wherein the magnet pockets 5 are each formed by a pocket section 11 of the magnet pocket 5 that passes through the laminated stack 3. In the magnet pockets 5 of the different magnet pocket types 13, 14, magnets 6 of two different magnet types 7, 9 are implemented. The magnets 6 of the first magnet type 7, which are arranged in the magnet pockets 5 of the first magnet pocket type 13, are implemented in such a way that a plurality of, in particular two, laminated stack boundary planes 10 of the laminated stack 3 that abut against each other are penetrated by each of the magnets 6. As a result, the laminated stack 3 in question is fixed in a pin-like manner by the magnets 6 of the first magnet type 7, which increases the rigidity of the rotor 1 or the laminated rotor stack 2. In order to realize a helix in the rotor 1 or in the rotor laminate 2, a plurality of magnets of the magnets 6 of the first magnet type 7 implemented in the magnet pockets 5 of the first magnet pocket type 13 and all magnets 6 of the second magnet type 9 arranged in the magnet pockets 5 of the second magnet pocket type 14 are arranged offset or rotated relative to each other by a helix angle 12 as viewed in the axial direction 23. The helix angle 12 can be determined in particular from Figure 1b It is concluded that, due to Figure 1b , the helix angle 12 is shown offset. In order to realize the helix of the rotor 1 or the rotor laminate 2 on the one hand, for which purpose the magnets 6 of the first magnet type 7 arranged in the magnet pockets 5 of the first magnet pocket type 13 are partially arranged offset relative to each other at the helix angle 12, and on the other hand the magnets 6 of the magnet type 7 can pass through the laminated segment boundary plane 10, the pocket segment 11 of the laminated segment 3 of the first laminated segment type 15 has two sub-segments 17, 18 offset or rotated relative to each other at the helix angle 12. Thus, in the rotated arrangement of the laminated segments 3 of the first laminated segment type 15 and the second laminated segment type 16, at least one sub-segment 17, 18 of the pocket segment 11 formed in the laminated segment 3 of the first laminated segment type 15 (here the sub-segment 17) is aligned with the pocket segment 11 of the respective first magnet pocket type 13 formed in the laminated segment 3 of the second laminated segment type 16.
[0034] For this purpose, a stack segment 3 of a first stack segment type 15 in which two subsegments 17, 18 of a first pocket section 11 of a first magnetic pocket type 13 are formed, each offset relative to one another by a helix angle 12, is formed, consists of a disk stack of individual disks 4 of two different disk types 19, 20. In this case, the subsegments 17, 18 offset relative to one another by a helix angle 12 are each formed in one of the disk stacks.
[0035] Here Figure 2a and Figure 2b4 shows individual disks 4 of two different disk types 19 , 20 which form the disk stack and thus the partial segments 17 , 18 in the stack segment 3 of the first stack segment type 15 .
[0036] Figure 2a Here, an individual disk 4 of a first disk type 19 is shown, wherein a first magnet opening 21 of a first magnetic pocket type 13 is formed in the individual disk. The first magnet opening 21 is located at Figure 1a and Figure 1b In the first disk stack of the stack segment 3 of the first stack segment type 15 shown in FIG. 1 , a first subsegment 17 of the first bag segment 11 of the first magnetic bag type 13 is formed. Figure 2a In the individual disks 4 of the first disk type 19 shown in FIG, a second magnet opening 21 of the second magnetic pocket type 14 is formed, which forms a second pocket section 11 of the second magnetic pocket type 14 in the stack section 3 of the first stack section type 15. In this case, there is a first relative position between the first magnet opening 21 and the second magnet opening 21 of the individual disks 4 of the first disk type 19.
[0037] also, Figure 2b An individual disk 4 of the second disk type 20 is shown, wherein the first magnet openings 21 of the first magnetic pocket type 13 are again formed in the individual disk. However, these first magnet openings 21 are Figure 1a and Figure 1b In the second disk stack of the stack segment 3 of the first stack segment type 15 shown in FIG. 1 , a second subsegment 18 of the first bag segment 11 of the first magnetic bag type 13 is formed. Figure 2b In the individual disks 4 of the second disk type 19 shown in the figure, the second magnet opening 21 of the second magnetic pocket type 14 is formed, which forms the second pocket section 11 of the second magnetic pocket type 14 in the stack section 3 of the first stack section type 15. Here, there is a second relative position between the first magnet opening 21 and the second magnet opening 21 of the individual disks 4 of the second individual disk type 20. As shown in FIG. Figure 2a and Figure 2b It can be seen that the first relative position and the second relative position are implemented offset relative to one another by a helix angle 12 .
[0038] from Figure 3 A second embodiment of a rotor 1 according to the invention is shown in FIG. 2 , which has a laminated rotor core 2 in which magnet pockets 5 of two different magnet pocket types 13 , 14 are formed. However, in this case, Figure 1a and Figure 1b Unlike the embodiment of the present invention, the rotor core 2 has only one type of laminated segment type 15 of laminated segments 3 rotated relative to each other at a helix angle 12, wherein the laminated segments 3 are in turn composed of Figure 2a and Figure 2b 1 and 2. The stacking segment 3 of the stacking segment type 15 thus also comprises a first pocket section 11, which has two subsections 17, 18 offset relative to one another by a helix angle 12. In the subsections 17, 18 of adjacent stacking segments 3 and thus of the magnetic pockets 5 of the first magnetic pocket type 13, magnets 6 of the first magnet type 7 are arranged, wherein these magnets pass through the stacking segment boundary planes 10 of the stacking segments 3 abutting against one another and thus pin the stacking segments 3 to one another. In order to utilize the entire length of the magnetic pockets 5 of the first magnetic pocket type 13, in addition to the magnets 6 of the first magnet type 7, magnets 6 of the second magnet type 8 are also arranged in the magnetic pockets 5 of the first magnetic pocket type 13. These magnets 6 of the second magnet type 8 are arranged at the end of the laminated rotor core 2 and in the axial direction 23 adjacent to the magnets 6 of the first magnet type 7 which pass through the laminated core segment boundary plane 10. The magnets of the second magnet type differ from the magnets 6 of the first magnet type 7 in that they are shorter and are also shorter than the pocket segments 11. The magnets 6 of the second magnet type 8 therefore do not pass through the laminated core segment boundary plane 10. Furthermore, magnets 6 of the third magnet type 9 are arranged in the second pocket segments 11 of the magnet pockets 5 of the second magnet pocket type 14, which, like the magnets 6 of the first and second magnet pocket types 7, 8, are arranged offset relative to one another at a helix angle 12.
[0039] from Figure 4 A third embodiment of the rotor 1 according to the invention can also be seen in the figure, which has a rotor laminate 2, wherein the rotor laminate 2 again has a plurality of laminate segments 3, which are composed of a plurality of individual disks 4, wherein only parts of the laminate segments 3 are arranged rotated relative to one another at a helix angle 12. In this case, the laminate segments 3 are also such laminate segments of a laminate segment type 16, in which the laminate segments 3 are composed of individual disks 4 of a single disk type 22. In this case, the magnetic pockets 5 of the first magnetic pocket type 13 and thus the first pocket segments 11 are curved and are in particular formed in an arc shape, which can be seen from the Figure 5. Here, magnets 6 of the first magnet type 7 are also implemented in the magnet pockets 5 of the first magnet pocket type 13, which fill the entire length of the magnet pockets 5 of the first magnet pocket type 13 and pass through the stacking segment boundary planes 10 of the stacking segments 3 that are adjacent to each other and thus pin the stacking segments 3 to each other. In order to realize the spiral of the rotor 1 or the rotor stack 2 on the one hand and pin the stacking segments 3 by the magnets 6 of the magnet type 7 by passing through the stacking segment boundary planes 10, the arc length of the magnets 6 of the first magnet type 7 is smaller than the arc length of the first pocket section 11 of the magnet pockets 5 of the first magnet pocket type 13. Due to the rotation of the stacking section 3 at the helix angle 12, two of the first pocket sections 11 of the first magnetic pocket type 13 that are bent one after another in the axial direction 23 overlap only partially in the circumferential direction 24 and thereby form an axially aligned overlapping region 25 of the magnetic pockets 5 of the first magnetic pocket type 13. The magnets 6 of the first magnet type 7 that pass through the stacking section dividing plane 10 are accordingly arranged in the overlapping region 25 of the magnetic pockets 5. However, the magnets 6 of the first magnet type 7 thus only partially fill the first pocket sections 11 of the first magnetic pocket type 13. In order to ensure a quasi-complete filling of the first pocket sections 11, in addition to the magnets 6 of the first magnet type 7, magnets 6 of the second magnet type 8 are also arranged in the first pocket sections 11 of the first magnetic pocket type 13, which magnets do not pass through the stacking section dividing plane 10 and are therefore shorter than the magnets 6 of the first magnet type 7 and, in particular, are slightly shorter than the pocket sections 11 of the first magnetic pocket type 13 themselves. The magnets 6 of the second magnet type 8 (which do not pass through the stack segment dividing plane 10) are accordingly placed in the corresponding pocket sections 11 of the first magnetic pocket type 13 along the Figure 5 The circumferential direction 24 shown in FIG. 1 is arranged adjacent to the magnets 6 of the first magnet type 7 passing through the stack segment boundary plane 10. Here, the magnets of the second magnet type in successive pocket segments 11 partially alternately abut the magnets 6 of the first magnet type 7 on different sides. In addition, in Figure 4 In the embodiment of the rotor 1, as in Figure 1a and Figure 1b as well as Figure 3 As in the embodiment of the rotor 1 of FIG. 1 , magnets 6 of a third magnet type 9 are arranged in second pocket sections 11 of magnet pockets 5 of a second magnet pocket type 14, which are arranged offset relative to one another at a helix angle 12. In this case, the helices of the rotor 1 or the laminated rotor core 2 change direction and change direction in opposite directions starting from the axial center of the laminated rotor core.
[0040] The arrangement of the magnets 6 of the third magnet type 9 in the magnetic pockets 5 of the second magnetic pocket type 14 and the curved design of the magnetic pockets 5 of the first magnetic pocket type 13 can again be seen from Figure 5In addition, Figure 5 3 , the arrangement of magnets 6 of the first and second magnet types 7 , 8 adjoining one another in the circumferential direction 24 is again shown.
[0041] also, Figure 6 A single disk of disk type 22 is shown, via which the Figure 4 The stack segment 3 of the stack segment type 16 of the embodiment of the rotor stack 2 is formed in the individual disks 4. The curved, here arc-shaped, magnet openings 21 of the first magnet pocket type 13 and the magnet openings 21 of the second magnet pocket type 14 are formed in the individual disks 4, which form corresponding, Figure 4 The pocket opening 11 of the first and second magnetic pocket types 13 and 14 are shown.
[0042] List of reference numerals:
[0043] 1 rotor
[0044] 2 Rotor stack
[0045] 3 stack sections
[0046] 4 single platter
[0047] 5 Magnetic Bags
[0048] 6 Magnets
[0049] 7 Magnet Types
[0050] 8 Magnet Types
[0051] 9 Magnet Types
[0052] 10 Stack segment dividing plane
[0053] 11 bags section
[0054] 12 Helix Angle
[0055] 13 Magnetic bag type
[0056] 14 Magnetic Bag Type
[0057] 15 stacked segment types
[0058] 16 stacked section type
[0059] 17 sub-segments
[0060] 18 sub-segments
[0061] 19 disc type
[0062] 20 disc types
[0063] 21 Magnet opening
[0064] 22 disc types
[0065] 23 Axial direction
[0066] 24 Circumferential direction
[0067] 25 Overlapping Area
[0068] 26 Rotor shaft
Claims
1. A rotor (1) of an electric motor, wherein: The rotor (1) comprises a rotor laminate (2) consisting of at least two laminated sections (3), wherein each of the laminated sections (3) comprises a plurality of individual disks (4) arranged next to one another, a plurality of magnetic pockets (5) are also formed in the rotor laminate (2), and magnets (6) of at least one magnet type (7, 8, 9) are arranged in the respective magnetic pockets (5), wherein the magnets (6) of at least one of the magnetic pockets (5) are designed such that at least one laminated section (3) abutting against one another is disposed adjacent to one another. A segment dividing plane (10) is penetrated by magnets (6) of a magnet type (7, 8, 9), characterized in that the magnetic pocket (5) is constructed by pocket sections (11, 22) of the magnetic pocket (5) passing through the stacked section (3), wherein at least two stacked sections of the stacked sections (3) are rotated relative to each other at a helix angle (12), and at least two magnets of the magnets (6) implemented in at least one magnetic pocket in the magnetic pocket (5) of at least one magnet type (7, 8, 9) are arranged offset relative to each other at the helix angle (12).
2. The rotor (1) according to claim 1, characterized in that Magnetic pockets (5) of at least two different magnetic pocket types (13, 14) are molded in the rotor core (2), wherein magnets (6) of one or more magnet types (7, 8, 9) are implemented in at least one magnetic pocket (5) of the respective magnetic pocket type (13, 14).
3. The rotor (1) according to claim 1 or 2, characterized in that The rotor laminate (2) has at least one laminate segment (3) of at least one laminate segment type (15), in which at least two subsegments (17, 18) of a pocket segment (11) offset relative to one another by a helix angle (12) are formed in the respective laminate segment (3).
4. The rotor (1) according to at least one of the preceding claims, characterized in that The stack segment type (15) comprises a stack of individual disks (4) of two different disk types (19, 20), in which at least two sub-segments (17, 18) of a pocket segment (11) are formed which are offset relative to each other at a helix angle (12), wherein the sub-segments (17, 18) offset relative to each other at the helix angle (12) are respectively formed in one of the disk stacks.
5. The rotor (1) according to at least one of the preceding claims, characterized in that A first relative position of a magnet opening (21) of a first magnetic pocket type (13) constructed in a single disk (4) of a first disk type (19) and constituting a first subsegment (17) of a pocket section (11) of the first magnetic pocket type (13) relative to a magnet opening (21) of a second magnetic pocket type (14) constructed in the single disk (4) and constituting a second pocket section (11) of the second magnetic pocket type (14) and a second relative position of a magnet opening (21) of a first magnetic pocket type (13) constructed in a single disk (4) of a second disk type (20) and constituting a second subsegment (18) of a pocket section (11) of the first magnetic pocket type (13) relative to a magnet opening (21) of a second magnetic pocket type (14) constructed in the single disk (4) and constituting a second magnetic pocket section (11) of the second magnetic pocket type (14) are implemented offset relative to each other by the helix angle (12).
6. The rotor (1) according to at least one of the preceding claims, characterized in that The laminated rotor core (2) has at least one laminated segment (3) of at least one laminated segment type (16), in which the laminated segments (3) of the laminated segment type (16) consist of individual disks (4) of a single disk type (22).
7. The rotor (1) according to at least one of the preceding claims, characterized in that The rotor stack (2) is constructed solely from stack segments (3) of a stack segment type (16) consisting of individual disks (4) of a single disk type (22), wherein the magnetic pockets (5) and / or pocket segments (11) of a first magnetic pocket type (13) are formed in a curved manner.
8. The rotor (1) according to at least one of the preceding claims, characterized in that At least two bag segments of the first magnetic bag type (13) which are bent and formed one after another in the axial direction (23) overlap only partially in the circumferential direction (24) to form an axially aligned overlapping area (25) of the magnetic bag (5), wherein magnets (6) of the first magnet type (7) are arranged in the overlapping area (25) of the magnetic bag (5) through the stacking segment boundary plane (10).
9. The rotor (1) according to at least one of the preceding claims, characterized in that In a magnetic pocket (5) of the first magnetic pocket type (13), magnets (6) of at least two magnet types (7, 8) are arranged, wherein the magnets (6) of one magnet type (7, 8) are designed in such a way that the magnets of the magnet type do not pass through a stack segment dividing plane (10).
10. The rotor (1) according to at least one of the preceding claims, characterized in that Magnets (6) of a second magnet type (8) that do not pass through a stacking segment boundary plane (10) are arranged in a bag section (11) of the first magnetic bag type (13) in an axial direction (23) or in a circumferential direction (24) adjacent to magnets (6) of a first magnet type (7) that pass through a stacking segment boundary plane (10).