Stator magnetic core, stator assembly, linear electric motor, suspension system and vehicle

Abstract

A stator magnetic core (10), comprising: a stator tooth portion (1) and a stator yoke portion (2), wherein the stator tooth portion (1) comprises a plurality of first laminations (11) stacked in a first direction, and the stator tooth portion (1) is provided with a first central hole (12); and the stator yoke portion (2) comprises a plurality of second laminations (21) stacked in a second direction, the stator yoke portion (2) is provided with a second central hole (22), and at least the second central hole (22) is formed as a mounting hole (3) of the stator magnetic core (10).

Description

Stator cores, stator assemblies, linear motors, suspension systems, and vehicles

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number 2023118712813 and application date December 29, 2023, and claims the priority of the above-mentioned Chinese patent application. The entire content of the above-mentioned Chinese patent application is hereby introduced into this application as a reference. Technical Field

[0003] The present application relates to the field of motor technology, and in particular to a stator core, a stator assembly, a linear motor, a suspension system, and a vehicle. Background Art

[0004] In related technologies, during the operation of a linear motor, eddy current loss is generated in the stator core, thereby reducing the thrust and efficiency of the linear motor.

[0005] Application Contents

[0006] The present application aims to solve one of the technical problems in the related art at least to a certain extent.

[0007] To this end, one purpose of the present application is to propose a stator core that can significantly reduce the eddy current loss of the stator core, thereby improving the thrust and efficiency of the linear motor.

[0008] According to an embodiment of the present application, the stator core includes: a stator tooth portion, which includes a plurality of first laminations stacked along a first direction, and the stator tooth portion is provided with a first center hole; a stator yoke portion, which includes a plurality of second laminations stacked along a second direction, and the stator yoke portion has a second center hole, and at least the second center hole is formed as a mounting hole of the stator core.

[0009] According to the stator core of the embodiment of the present application, the stator tooth portion is composed of a plurality of first laminations stacked along a first direction so as to weaken the eddy current loss of the stator tooth portion, and the stator yoke portion is composed of a plurality of second laminations stacked along a second direction so as to weaken the eddy current loss of the stator yoke portion. In this way, the eddy current loss of the stator core can be greatly weakened, thereby improving the thrust and efficiency of the linear motor.

[0010] According to the stator core of some embodiments of the present application, the second center hole is formed as a mounting hole of the stator core.

[0011] According to the stator core of some embodiments of the present application, the stator yoke is arranged on the inner wall of the first center hole.

[0012] According to the stator core of some embodiments of the present application, the outer peripheral wall of the stator yoke is fixedly matched with the inner peripheral wall of the first center hole.

[0013] According to the stator core of some embodiments of the present application, the first center hole is connected to the second center hole, and the first center hole and the second center hole together form the mounting hole.

[0014] According to the stator core of some embodiments of the present application, in the first direction, the projection of the stator yoke portion and the projection of the stator tooth portion at least partially overlap.

[0015] According to the stator core of some embodiments of the present application, in the first direction, the stator yoke is arranged on one side of the stator teeth.

[0016] According to the stator core of some embodiments of the present application, the second laminations are stacked along the radial direction of the stator teeth.

[0017] According to the stator core of some embodiments of the present application, the plurality of first laminations and the second laminations are arranged in a one-to-one correspondence, and the first laminations and the corresponding second laminations are an integral part.

[0018] According to the stator core of some embodiments of the present application, the second laminations are stacked along the axial direction.

[0019] According to the stator core of some embodiments of the present application, a positioning protrusion is provided on the inner wall of the mounting hole.

[0020] According to the stator core of some embodiments of the present application, the positioning protrusion is formed on the stator yoke.

[0021] According to the stator core of some embodiments of the present application, a first positioning protrusion is provided on the stator tooth portion, and a second positioning protrusion is provided on the stator yoke portion, and the first positioning protrusion and the second positioning protrusion are correspondingly arranged to form the positioning protrusion.

[0022] According to the stator core of some embodiments of the present application, the outer peripheral wall of the stator tooth portion is provided with a wire passing slot extending in the axial direction.

[0023] According to the stator core of some embodiments of the present application, there are multiple wire slots and they are evenly spaced along the circumference of the stator teeth.

[0024] The application also proposes a stator assembly.

[0025] According to an embodiment of the present application, the stator assembly includes: a stator core, which is the stator core described in any one of the above embodiments; and a stator winding, which is placed on the stator teeth and is externally mounted on the stator yoke.

[0026] This application also proposes a linear motor.

[0027] According to an embodiment of the present application, the linear motor includes: a stator assembly, which is the stator assembly described in any one of the above embodiments; and a mover assembly, which is movably matched with the stator assembly.

[0028] The present application also proposes a suspension system, comprising the linear motor described in any one of the above embodiments.

[0029] The present application also proposes a vehicle comprising the suspension system described in any one of the above embodiments.

[0030] The advantages of the vehicle, the suspension system, the linear motor and the stator assembly are the same as those of the above-mentioned stator core compared to the prior art, which will not be described in detail here.

[0031] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] FIG1 is a schematic diagram of a stator core according to a first embodiment of the present application;

[0033] FIG2 is a partial cross-sectional schematic diagram of the stator core shown in FIG1 ;

[0034] FIG3 is a schematic diagram of a stator core according to a second embodiment of the present application;

[0035] FIG4 is a partial cross-sectional schematic diagram of the stator core shown in FIG2 ;

[0036] FIG5 is a schematic diagram of a stator core according to a third embodiment of the present application;

[0037] FIG6 is a partial cross-sectional schematic diagram of the stator core shown in FIG5 ;

[0038] FIG7 is a schematic diagram of a stator core according to a fourth embodiment of the present application;

[0039] FIG8 is a partial cross-sectional schematic diagram of the stator core shown in FIG7.

[0040] Figure numerals: stator core 10; first direction X; integral part 101; stator tooth portion 1; first lamination 11; first center hole 12; inner wall 13 of the first center hole; stator yoke 2; second lamination 21; second center hole 22; outer peripheral wall 23 of the stator yoke; mounting hole 3; positioning protrusion 31; first positioning protrusion 311; second positioning protrusion 312; wire slot 4. DETAILED DESCRIPTION

[0041] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0042] The stator core 10 according to an embodiment of the present application will be described below with reference to FIG. 1 to FIG. 8 .

[0043] As shown in FIG. 1 to FIG. 8 , the stator core 10 according to an embodiment of the present application includes: a stator tooth portion 1 and a stator yoke portion 2 .

[0044] As shown in Figure 1, the stator tooth portion 1 includes a plurality of first laminations 11 stacked along a first direction X, the stator tooth portion 1 is provided with a first center hole 12, the stator yoke portion 2 includes a plurality of second laminations 21 stacked along a second direction, the stator yoke portion 2 has a second center hole 22, at least the second center hole 22 is formed as a mounting hole 3 of the stator core 10.

[0045] The first direction X and the second direction may be the same direction, or the first direction X and the second direction may be intersecting directions, or the first direction X and the second direction may be perpendicular to each other, which is not limited here.

[0046] Therefore, the stator teeth 1 and the stator yoke 2 are stacked, so the eddy current loss of the stator teeth 1 and the stator yoke 2 can be weakened. In this way, the eddy current loss of the stator core 10 can be greatly weakened, thereby improving the thrust and efficiency of the linear motor.

[0047] It should be noted that the stator core 10 of the present application can be used for a cylindrical permanent magnet synchronous linear motor or other linear motors, which is not limited here.

[0048] In this embodiment, the stator core 10 is used for a cylindrical permanent magnet synchronous linear motor for illustration. For example, as shown in FIG1 , the stator core 10 includes a stator tooth portion 1 and a stator yoke portion 2 .

[0049] As shown in FIG1 , FIG3 , FIG5 and FIG7 , the stator tooth portion 1 is configured as an annular structure, the stator yoke portion 2 is configured as a cylindrical structure, and the stator yoke portion 2 is connected to the stator tooth portion 1 .

[0050] As shown in Figures 3 and 4, the stator tooth portion 1 is provided with a first center hole 12, the stator yoke portion 2 is located radially inward of the stator tooth portion 1, and the stator yoke portion 2 has a second center hole 22. At least the second center hole 22 is formed as a mounting hole 3 for the stator core 10, so that the stator core 10 can be mounted on its mounting axis through the mounting hole 3.

[0051] Optionally, the stator yoke 2 extends in the axial direction and is located radially inside the stator tooth 1. It is worth noting that the radial direction in the above description refers to the direction toward the geometric center of the stator tooth 1 on a cross section of the stator tooth 1 perpendicular to the axial direction.

[0052] For example, the outer peripheral wall of the stator tooth portion 1 is constructed as a circular structure or an annular structure, and the stator yoke portion 2 is located radially inside the annular structure, or the stator tooth portion 1 is constructed as a polygonal structure, and the direction toward the geometric center of the polygonal structure on a cross section perpendicular to the axial direction is radially inside, or the outer peripheral wall of the stator tooth portion 1 can also be other shapes, which are not limited here.

[0053] Among them, the stator tooth portion 1 is composed of a plurality of first laminations 11 stacked along a first direction X. Compared with the stator tooth portion 1 being a whole conductor structure, the stacking arrangement of the plurality of first laminations 11 facilitates weakening the eddy current loss of the stator tooth portion 1. The stator yoke portion 2 is composed of a plurality of second laminations 21 stacked along a second direction. Compared with the stator yoke portion 2 being a whole conductor structure, the stacking arrangement of the plurality of second laminations 21 facilitates weakening the eddy current loss of the stator yoke portion 2.

[0054] The first direction X may be the axial direction, radial direction or circumferential direction of the stator core 10 , and the second direction may be the axial direction, radial direction or circumferential direction of the stator core 10 , which is not limited here.

[0055] For example, as shown in Figure 1, the first direction X is the axial direction of the stator core 10, and the second direction is the radial direction of the stator core 10. It should be noted that when the linear motor is actually running, the direction of the magnetic circuit inside the linear motor will change. Therefore, in this application, a plurality of first laminations and a plurality of second laminations are stacked in the axial and radial directions respectively, so that the stator teeth 1 and the stator yoke 2 can weaken the eddy current loss in different directions, thereby improving the thrust and efficiency of the linear motor.

[0056] According to the stator core 10 of the embodiment of the present application, its stator tooth portion 1 is composed of a plurality of first laminations 11 stacked along a first direction X, so as to weaken the eddy current loss of the stator tooth portion 1, and the stator yoke portion 2 is composed of a plurality of second laminations 21 stacked along a second direction, so as to weaken the eddy current loss of the stator yoke portion 2. In this way, the eddy current loss of the stator core 10 can be greatly weakened, thereby improving the thrust and efficiency of the linear motor.

[0057] In some embodiments, as shown in FIG. 1 , FIG. 2 , and FIG. 5 - FIG. 8 , the second center hole 22 is formed as the mounting hole 3 of the stator core 10 .

[0058] Therefore, the second center hole 22 can be used to realize the assembly of the stator core 10 and the stator core 10, thereby reducing the difficulty of assembling the two.

[0059] In some embodiments, as shown in FIG. 3 and FIG. 4 , the stator yoke 2 is disposed on the inner wall of the first center hole 12 .

[0060] Therefore, the space within the first center hole 12 can be used to arrange the stator yoke 2, thereby saving the arrangement space of the stator yoke 2, and further reducing the overall structural size of the stator core 10, which is conducive to realizing the miniaturization design of the stator core 10.

[0061] In some embodiments, as shown in FIG. 3 and FIG. 4 , the outer peripheral wall 23 of the stator yoke 2 cooperates with the inner wall 13 of the first central hole 12 .

[0062] “Matching” includes but is not limited to welding, snap-fitting and other matching methods, and welding can be ultrasonic welding, hot melt welding, etc., which are not limited here.

[0063] As a result, at least part of the stator yoke 2 can be arranged in the first center hole 12 so that the outer peripheral wall 23 of the stator yoke cooperates with the inner peripheral wall 13 of the first center hole. This is conducive to improving the installation accuracy, reducing the impact on the thrust and efficiency of the linear motor, weakening the thrust fluctuation, improving space utilization, reducing the overall structural size of the stator core 10, and realizing the miniaturized design of the stator core 10.

[0064] In some embodiments, as shown in FIG. 3 , FIG. 4 , FIG. 7 and FIG. 8 , the first center hole 12 is connected to the second center hole 22 , and the first center hole 12 and the second center hole 22 are jointly formed as a mounting hole.

[0065] Thereby, the extension length of the mounting hole 3 is increased.

[0066] In some embodiments, in the first direction X, a projection of the stator yoke 2 and a projection of the stator teeth 1 at least partially overlap.

[0067] Thus, at least part of the stator yoke 2 is located on one side of the stator tooth 1 in the stacking direction of the first laminations 11 , so as to fully utilize the space of the stator tooth 1 in the first direction X and improve space utilization.

[0068] In some embodiments, the stator yoke 2 is disposed on one side of the stator tooth 1 in the first direction X. This reduces the difficulty of disposing the stator yoke 2 and facilitates full utilization of the space of the stator tooth 1 in the first direction X, thereby improving space utilization.

[0069] In some embodiments, as shown in FIG. 1 to FIG. 6 , a plurality of second laminations 21 are stacked along the radial direction of the stator teeth 1 .

[0070] As a result, the distribution direction of the second laminations 21 will not occupy the axial space of the stator tooth portion 1, which is beneficial to reducing the axial space occupied by the stator tooth portion 1. At the same time, multiple second laminations 21 are stacked along the radial direction of the stator tooth portion 1, which can weaken the eddy current loss of the stator yoke 2 in the axial direction, thereby improving the thrust and efficiency of the linear motor and weakening the thrust fluctuation of the linear motor.

[0071] In some embodiments, as shown in FIG. 2 , a plurality of first laminates 11 and a plurality of second laminates 21 are arranged in a one-to-one correspondence, and the first laminates 11 and the corresponding second laminates 21 are an integral part 101 .

[0072] As a result, the first laminate 11 and the corresponding second laminate 21 are an integrated structure, so that there is no need for a separate connection and fixation between the first laminate 11 and the corresponding second laminate 21, which leads to a smaller structural cross-section, less gluing, and higher assembly precision, without affecting the thrust efficiency of the linear motor while weakening the thrust fluctuation of the linear motor, and facilitating reduction of production difficulty and cost.

[0073] In some embodiments, as shown in FIG. 7 and FIG. 8 , the second laminations 21 are stacked along the axial direction of the stator teeth 1 .

[0074] As a result, the axial installation accuracy of the stator core 10 can be improved, the impact on the thrust and efficiency of the linear motor can be reduced, and the thrust fluctuation can be weakened.

[0075] For example, multiple first laminations 11 are stacked along the axial direction of the stator teeth 1, and multiple second laminations 21 are stacked along the axial direction of the stator teeth 1, that is, the second laminations 21 are stacked in the same direction as the first laminations 11. In this way, the stator core 10 is made by fixing the independent stator teeth 1 and stator yoke 2, thereby significantly reducing eddy current losses while reducing the impact on the thrust and efficiency of the linear motor. It is also beneficial to improve the axial installation accuracy of the stator core 10, reduce the impact on the thrust and efficiency of the linear motor, and weaken thrust fluctuations. In addition, when used in more complex linear motors, the stator core 10 made of this independent stacking assembly structure can also be applied.

[0076] In any of the above embodiments, as shown in FIG. 1 to FIG. 8 , a positioning protrusion 31 is provided on the inner wall of the mounting hole 3 .

[0077] Therefore, the positioning protrusion 31 can be used to position and guide the stator core during assembly, thereby reducing the difficulty of assembling the stator core. For example, when the stator core is installed on a shaft, the positioning protrusion 31 can be used to cooperate with the positioning groove on the shaft to reduce the difficulty of assembling the stator core on the shaft.

[0078] For example, the positioning protrusion 31 can protrude radially inward from the mounting hole 3 and extend axially. In this way, when installing the stator core, the positioning protrusion 31 can play a limiting role in the circumferential direction of the mounting hole 3 and a guiding role in the axial direction of the mounting hole 3, thereby ensuring the installation stability of the stator core.

[0079] In some embodiments, as shown in FIG3 and FIG7 , a first positioning protrusion 311 is provided on the stator tooth portion 1 , and a second positioning protrusion 312 is provided on the stator yoke portion 2 . The first positioning protrusion 311 and the second positioning protrusion 312 are correspondingly provided to form a positioning protrusion 31 .

[0080] Therefore, when the mounting hole 3 is installed on a shaft, the stator tooth portion 1 can be positioned and matched with the shaft through the first positioning protrusion 311, and the stator yoke portion 2 can be positioned and matched with the shaft through the second positioning protrusion 312, thereby improving the assembly accuracy of the stator core 10 and the shaft.

[0081] In any of the above embodiments, as shown in FIG. 1 to FIG. 8 , the outer peripheral wall of the stator tooth portion 1 is provided with a wire groove 4 extending in the axial direction.

[0082] Therefore, by setting the wire slot 4, the three-phase wires of the stator core 10 can be arranged in the wire slot 4. The wire slot 4 is provided on the outer peripheral wall of the stator tooth portion 1 and extends axially to avoid interference between the three-phase wires and the stator yoke portion 2, and it is beneficial to reduce the processing difficulty of the wire slot 4.

[0083] For example, the wire slot 4 can be made by stamping and laminating the first laminations 11, and as shown in 1-8, the wire slot 4 is open toward the radial outside of the stator tooth portion 1, so that the three-phase line can be installed into the wire slot 4 along the opening of the wire slot 4, and at least part of the three-phase line can be arranged axially to reduce the difficulty of arranging the three-phase line.

[0084] In some embodiments, as shown in FIG. 1 to FIG. 8 , there are multiple wire slots 4 and they are evenly spaced along the circumference of the stator tooth portion 1 .

[0085] For example, there may be three wire slots 4, evenly spaced along the circumference of the stator tooth 1. This facilitates installation of the three-phase wires of the stator core 10. In particular, after the positioning protrusion 31 is positioned and engaged with its mounting structure, the three wire slots 4 evenly spaced along the circumference of the stator tooth 1 are aligned.

[0086] The following describes some specific embodiments of the stator core 10 of the present application with reference to Figures 1-8:

[0087] The first embodiment is shown in Figures 1 and 2:

[0088] As shown in FIG1 , a stator core 10 is used in a three-phase cylindrical permanent magnet synchronous linear motor. The stator core 10 includes a stator tooth portion 1 and a stator yoke portion 2. The stator tooth portion 1 includes a plurality of first laminations 11 stacked along a first direction X, and the stator yoke portion 2 includes a plurality of second laminations 21 stacked along a second direction X. Both the first laminations 11 and the second laminations 21 may be silicon steel sheets.

[0089] The first direction X is the axial direction of the stator core 10 , and the second direction is the radial direction of the stator core 10 .

[0090] As shown in FIG2 , a plurality of first laminates 11 and a plurality of second laminates 21 are arranged in one-to-one correspondence. The first laminates 11 and the corresponding second laminates 21 are an integral part 101 . For example, the first laminates 11 and the corresponding second laminates 21 are made by integral stamping and lamination.

[0091] As shown in FIG. 2 , three wire slots 4 are formed on the outer peripheral wall of the stator tooth portion 1 by stamping and laminating, and a positioning protrusion 31 is stamped out on the second lamination 21 near the mounting hole 3 .

[0092] The stator core 10 manufactured by one-piece stamping has high assembly accuracy. At the same time, due to the presence of the positioning protrusion 31, the installation difficulty can be reduced when installing the stator core 10, thereby ensuring that the three-phase line slots 4 of the stator core 10 are aligned, and the axially stacked stator teeth 1 and the radially stacked stator yoke 2 can significantly weaken the eddy current loss in the stator core 10. In addition, the stator core 10 manufactured by one-piece stamping can also ensure the thrust and efficiency of the linear motor, while weakening the thrust fluctuation of the linear motor.

[0093] The second embodiment is shown in Figures 3 and 4:

[0094] As shown in Figure 3, a stator core 10 is used in a three-phase cylindrical permanent magnet synchronous linear motor. The stator core 10 includes a stator tooth portion 1 and a stator yoke portion 2. The stator tooth portion 1 includes a plurality of first laminations 11 stacked along a first direction X, and the stator yoke portion 2 includes a plurality of second laminations 21 stacked along a second direction. The stator yoke portion 2 is located on one axial side of the stator tooth portion 1. The stator yoke portion 2 and the stator tooth portion 1 are reinforced by laser welding. Both the first laminations 11 and the second laminations 21 can be silicon steel sheets.

[0095] The first direction X is the axial direction of the stator core 10 , and the second direction is the radial direction of the stator core 10 .

[0096] As shown in Figure 4, three wire grooves 4 are formed on the outer peripheral wall of the stator tooth portion 1 by stamping and laminating, and tooth bosses and yoke bosses are respectively stamped out on the inner peripheral wall of the stator tooth portion 1 and the second lamination 21 near the mounting hole 3. The tooth bosses and yoke bosses together constitute a positioning protrusion 31.

[0097] The stator core 10 is made by fixing an independent stator tooth portion 1 and a stator yoke portion 2. The stator tooth portion 1 and the stator yoke portion 2 are reinforced by laser welding, and the tooth boss formed by axial stamping and lamination on the stator tooth portion 1 can make the stator tooth portion 1 fit tightly with its mounting structure. On the basis of strengthening the connection between the stator tooth portion 1 and the stator yoke portion 2 by laser welding, the yoke boss stamped on the stator yoke portion 2 can further improve the assembly accuracy of the stator yoke portion 2 and its mounting structure, thereby significantly reducing eddy current losses while reducing the impact on the thrust and efficiency of the linear motor. In addition, when used in more complex linear motors, the stator core 10 made of this independent lamination assembly structure can also be applied.

[0098] The third embodiment is shown in Figures 5 and 6:

[0099] As shown in Figure 5, a stator core 10 is used in a three-phase cylindrical permanent magnet synchronous linear motor. The stator core 10 includes a stator tooth portion 1 and a stator yoke portion 2. The stator tooth portion 1 includes a plurality of first laminations 11 stacked along a first direction X, and the stator yoke portion 2 includes a plurality of second laminations 21 stacked along a second direction. The stator yoke portion 2 is axially inserted into the first center hole 12 and fixed to the inner circumferential wall of the stator tooth portion 1. The stator yoke portion 2 and the stator tooth portion 1 are reinforced by laser welding. Both the first laminations 11 and the second laminations 21 can be silicon steel sheets.

[0100] The first direction X is the axial direction of the stator core 10 , and the second direction is the radial direction of the stator core 10 .

[0101] As shown in FIG6 , three wire slots 4 are formed on the outer peripheral wall of the stator tooth portion 1 by stamping and laminating, and a positioning protrusion 31 is stamped out on the second lamination 21 near the mounting hole 3 .

[0102] The stator core 10 is manufactured by fixing independent stator teeth 1 and stator yokes 2 together, which are connected by laser welding. The yoke of the stator core 10 is formed by stamping and laminating to form positioning protrusions 31. This improves the installation accuracy of the stator yoke 2 during assembly with the mounting structure (the mounting structure is the stator core 10's mounting structure, such as a shaft, etc., similarly hereinafter).

[0103] Furthermore, the integrated positioning protrusions 31 further enhance assembly precision, and the stator yoke 2 is inserted into the stator teeth 1 to form a mechanical connection. Laser welding further strengthens the direct connection between the stator teeth 1 and the stator yoke 2. This structure ensures a secure connection between the stator teeth 1 and the stator yoke 2 while maintaining a certain level of assembly precision. Furthermore, while significantly reducing eddy current losses in the stator core 10, it also reduces thrust fluctuations in the linear motor, minimizing its impact on thrust and efficiency.

[0104] The fourth embodiment is shown in Figures 7 and 8:

[0105] As shown in Figure 7, a stator core 10 is used in a three-phase cylindrical permanent magnet synchronous linear motor. The stator core 10 includes a stator tooth portion 1 and a stator yoke portion 2. The stator tooth portion 1 includes a plurality of first laminations 11 stacked along a first direction X, and the stator yoke portion 2 includes a plurality of second laminations 21 stacked along a second direction. The stator yoke portion 2 is located on one axial side of the stator tooth portion 1. The stator yoke portion 2 and the stator tooth portion 1 are reinforced by laser welding. Both the first laminations 11 and the second laminations 21 can be silicon steel sheets.

[0106] The first direction X is the axial direction of the stator core 10 , and the second direction is the axial direction of the stator core 10 .

[0107] As shown in Figure 8, three wire grooves 4 are formed on the outer peripheral wall of the stator tooth portion 1 by stamping and laminating, and tooth bosses and yoke bosses are respectively stamped out on the inner peripheral wall of the stator tooth portion 1 and the stator yoke portion 2. The tooth bosses and yoke bosses together constitute a positioning protrusion 31.

[0108] The stator core 10 is made of independent stator teeth 1 and stator yokes 2 fixed together. The stator teeth 1 and stator yokes 2 are reinforced by laser welding, and the tooth bosses formed by axial stamping and lamination on the stator teeth 1 enable the stator teeth 1 to form a tight fit with its mounting structure. In addition to strengthening the connection between the stator teeth 1 and the stator yoke 2 by laser welding, the yoke bosses stamped on the stator yoke 2 further improve the assembly accuracy of the stator yoke 2 and its mounting structure, ensuring the alignment of the three-phase line slots 4 of the stator core 10.

[0109] In addition, since the axial stamping and lamination process of silicon steel sheets is very mature, the structure in this application has high process feasibility. In addition, this stator core 10 structure can also reduce the thrust fluctuation of the linear motor while greatly reducing the eddy current loss, and ensure the thrust and efficiency of the linear motor.

[0110] Therefore, in this application, the stator teeth 1 and the stator yoke 2 are both made of laminated silicon steel sheets, which can significantly reduce the eddy current losses in the stator teeth 1 and the stator yoke 2. Since the stamping and lamination process is very mature, the process feasibility of the stator teeth 1 and the stator yoke 2 structure made of laminated silicon steel sheets in the stator core 10 of the application is very high. While significantly reducing eddy current losses, it can ensure installation accuracy, thereby ensuring the thrust and efficiency of the linear motor and reducing thrust fluctuations.

[0111] This patent has the following advantages over the existing technology:

[0112] 1. The stacked structure of the stator yoke 2 and the stator teeth 1 can significantly reduce the eddy current loss of the stator core 10 while ensuring higher thrust and efficiency of the linear motor.

[0113] 2. The process feasibility of laminating the stator yoke 2 and the stator teeth 1 is relatively high.

[0114] 3. The stator tooth part 1 and the stator yoke part 2 are made by lamination, and the connection between the tooth yoke is strengthened by laser welding, so that the structure is tight and the reliability is high.

[0115] 4. The inner peripheral wall of the stator yoke 2 is formed by stamping, which has high precision and can form a precise fit with its installation structure.

[0116] 5. The inner peripheral wall of the stator tooth portion 1 is formed by stamping, and has high precision, and can form a precise fit with its mounting structure.

[0117] 6. The positioning protrusion 31 formed by stamping on the inner wall of the stator yoke 2 can improve the assembly accuracy with its mounting structure, ensure the stable thrust and efficiency of the linear motor, and reduce thrust fluctuations.

[0118] 7. The positioning protrusions 31, formed by stamping on the inner circumference of the stator teeth 1, improve the assembly precision of the mounting structure, ensuring stable thrust and efficiency of the linear motor while reducing thrust fluctuations. Furthermore, this ensures the alignment of the three-phase wire slots 4 of the stator core 10.

[0119] 8. The utilization rate of the stator core 10 is high.

[0120] The application also proposes a stator assembly.

[0121] The stator assembly according to the embodiment of the present application includes: a stator core 10 and a stator winding.

[0122] The stator core 10 is the stator core 10 of any of the above embodiments, and the stator winding is placed on the stator teeth 1 and is covered on the stator yoke 2 .

[0123] As a result, the stator tooth portion 1 can support the stator winding, and the stator yoke portion 2 can limit the stator winding, thereby enhancing the structural stability of the stator winding. At the same time, the stator winding is sheathed around the stator yoke portion 2, which can avoid interference between the stator winding and its installation structure.

[0124] In addition, the stator winding can make full use of the space between the stator teeth 1 and the stator yoke 2, thereby improving space utilization, thereby reducing the overall structural size of the stator assembly, and facilitating the miniaturization design of the stator assembly.

[0125] According to the stator assembly of an embodiment of the present application, its stator tooth portion 1 is composed of a plurality of first laminations 11 stacked along a first direction X, so as to weaken the eddy current loss of the stator tooth portion 1, and the stator yoke portion 2 is composed of a plurality of second laminations 21 stacked along a second direction, so as to weaken the eddy current loss of the stator yoke portion 2. In this way, the eddy current loss of the stator core 10 can be greatly weakened, thereby improving the thrust and efficiency of the linear motor.

[0126] This application also proposes a linear motor.

[0127] According to an embodiment of the present application, the linear motor includes: a stator assembly and a mover assembly, the stator assembly is the stator assembly of any one of the above embodiments, and the mover assembly cooperates with the above stator assembly to achieve the working requirements of the linear motor.

[0128] According to the linear motor of the embodiment of the present application, the stator tooth portion 1 of its stator assembly is composed of a plurality of first laminations 11 stacked along a first direction X, so as to weaken the eddy current loss of the stator tooth portion 1, and the stator yoke portion 2 is composed of a plurality of second laminations 21 stacked along a second direction, so as to weaken the eddy current loss of the stator yoke portion 2. In this way, the eddy current loss of the stator core 10 can be greatly weakened, thereby improving the thrust and efficiency of the linear motor.

[0129] The present application also proposes a suspension system.

[0130] The suspension system according to an embodiment of the present application includes the linear motor according to any one of the above embodiments.

[0131] According to the suspension system of an embodiment of the present application, the stator tooth portion 1 of the linear motor is composed of a plurality of first laminations 11 stacked along a first direction X, so as to weaken the eddy current loss of the stator tooth portion 1, and the stator yoke portion 2 is composed of a plurality of second laminations 21 stacked along a second direction, so as to weaken the eddy current loss of the stator yoke portion 2. In this way, the eddy current loss of the stator core 10 can be greatly weakened, thereby improving the thrust and efficiency of the linear motor.

[0132] The present application also proposes a vehicle.

[0133] A vehicle according to an embodiment of the present application includes the suspension system according to any one of the above embodiments.

[0134] According to the vehicle of the embodiment of the present application, the stator tooth portion 1 of its suspension system is composed of a plurality of first laminations 11 stacked along a first direction X, so as to weaken the eddy current loss of the stator tooth portion 1, and the stator yoke portion 2 is composed of a plurality of second laminations 21 stacked along a second direction, so as to weaken the eddy current loss of the stator yoke portion 2. In this way, the eddy current loss of the stator core 10 can be greatly weakened, thereby improving the thrust and efficiency of the linear motor.

[0135] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0136] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means more than two, unless otherwise specifically defined.

[0137] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0138] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0139] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0140] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A stator core (10), wherein, Comprising: A stator tooth part (1), the stator tooth part (1) includes a plurality of first laminations (11) stacked along a first direction (X), and the stator tooth part (1) is provided with a first central hole (12); A stator yoke part (2), the stator yoke part (2) includes a plurality of second laminations (21) stacked along a second direction, and the stator yoke part (2) has a second central hole (22), and at least the second central hole (22) is formed as a mounting hole (3) of the stator core (10).

2. The stator core (10) according to claim 1, wherein, The second central hole (22) is formed as the mounting hole (3) of the stator core (10).

3. The stator core (10) according to claim 2, wherein, The stator yoke part (2) is disposed on the inner wall of the first central hole (12).

4. The stator core (10) according to claim 3, wherein, The outer peripheral wall (23) of the stator yoke part (2) cooperates with the inner wall (13) of the first central hole (12).

5. The stator core (10) according to claim 1, wherein, The first central hole (12) communicates with the second central hole (22), and the first central hole (12) and the second central hole (22) together form the mounting hole.

6. The stator core (10) according to claim 5, wherein, In the first direction (X), at least part of the projection of the stator yoke part (2) coincides with the projection of the stator tooth part (1).

7. The stator core (10) according to claim 5 or 6, wherein, In the first direction (X), the stator yoke part (2) is disposed on one side of the stator tooth part (1).

8. The stator core (10) according to any one of claims 1-7, wherein, The second laminations (21) are stacked along the radial direction of the stator tooth part (1).

9. The stator core (10) according to any one of claims 1-8, wherein, The plurality of first laminations (11) and the second laminations (21) are arranged in one-to-one correspondence, and the first lamination (11) and the corresponding second lamination (21) are an integral part (101).

10. The stator core (10) according to any one of claims 1-9, wherein, The second laminations (21) are stacked along the axial direction of the stator tooth part (1).

11. The stator core (10) according to any one of claims 1-10, wherein, The inner wall of the mounting hole (3) is provided with a positioning projection (31).

12. The stator core (10) according to claim 11, wherein, The positioning projection (31) is formed on the stator yoke part (2).

13. The stator core (10) according to claim 11 or 12, wherein, A first positioning projection (311) is provided on the stator tooth part (1), and a second positioning projection (312) is provided on the stator yoke part (2), and the first positioning projection (311) and the second positioning projection (312) are correspondingly arranged to form the positioning projection (31).

14. The stator core (10) according to any one of claims 1-13, wherein, The outer peripheral wall of the stator tooth part (1) is provided with a wire groove (4) extending axially.

15. The stator core (10) according to claim 14, wherein, The wire grooves (4) are multiple and are evenly spaced along the circumferential direction of the stator tooth part (1).

16. A stator assembly, wherein, Comprising: A stator core (10), the stator core (10) is the stator core (10) according to any one of claims 1-15; A stator winding, the stator winding is placed on the stator tooth part (1) and is sleeved on the stator yoke part (2).

17. A linear motor, wherein, Comprising: A stator assembly, the stator assembly is the stator assembly according to claim 16; A mover assembly, the mover assembly is movably matched with the stator assembly.

18. A suspension system, wherein, Comprising the linear motor according to claim 17.

19. A vehicle, wherein, Comprising the suspension system according to claim 18.

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