Stator assembly, linear electric motor, electromagnetic suspension and vehicle

Abstract

Disclosed in the present application are a stator assembly, a linear electric motor, an electromagnetic suspension and a vehicle. The stator assembly comprises a stator core and a stator coil. The stator core comprises a plurality of sub-cores sequentially arranged in an axial direction, with a stator slot formed between every two adjacent sub-cores. The stator coil comprises coil segments and bridge wires, the coil segments are accommodated in the stator slots, coil segments of the same phase are connected by means of corresponding bridge wires, wire passage grooves for routing the bridge wires are provided in an outer peripheral wall of the sub-cores, in the circumferential direction of the sub-cores, the maximum length of a first projection of a first core protrusion on a reference plane in a reference direction is smaller than the minimum distance between a second projection of the bridge wires of a first phase on the first reference plane and a third projection of the bridge wires of a second phase on the first reference plane. According to the stator assembly of an embodiment of the present application, the assembly of the stator coil and the stator core is easier, and the risk of scratching the bridge wires by the stator core during the assembly of the stator core and the stator coil can be reduced.

Description

Stator assembly, linear motor, electromagnetic suspension and vehicle

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on March 29, 2024, with application number 202410384561.X and application name “Stator assembly, linear motor, electromagnetic suspension and vehicle”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of vehicle technology, and in particular to a stator assembly, a linear motor, an electromagnetic suspension, and a vehicle. Background Art

[0003] In related technologies, the stator coils of a linear motor are usually wound into coils and then embedded in the stator slots of the stator core. Multiple coils of the same phase are connected by bridge wires, which are located on the outer periphery of the stator core. For three-phase linear motors, or even multi-phase linear motors, efficient assembly of stator components remains a challenge.

[0004] Summary of the Invention

[0005] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present application is to propose a stator assembly, which provides a wire groove for avoiding the bridge wire on the outer peripheral wall of the stator core, and in the circumferential direction of the stator core, makes the projection of the first core protrusion on the first reference plane a first projection, the projection of the first phase bridge wire on the first reference plane a second projection, and the projection of the second phase bridge wire on the first reference plane a third projection, and the maximum length of the first projection in the reference direction is less than the minimum distance between the second projection and the third projection, so that the assembly of the stator coil and the stator core can be more convenient, and the possibility of the stator core causing damage to the bridge wire during the assembly of the stator core and the stator coil can be reduced; and the overall structure of the stator assembly can be made more compact.

[0006] The present application proposes a linear motor having the above-mentioned stator assembly.

[0007] The present application proposes an electromagnetic suspension having the above-mentioned linear motor.

[0008] The present application also proposes a vehicle having the electromagnetic suspension.

[0009] According to the stator assembly of the embodiment of the first aspect of the present application, it includes: a stator core, including a plurality of sub-cores arranged in sequence along the axial direction, and a stator slot is formed between two adjacent sub-cores; a stator coil, installed on the stator core and including at least three-phase coils, each phase coil including a bobbin and a bridge wire, the bobbin being accommodated in the stator slot, and the bobbin of the same phase located in different stator slots is connected by the corresponding bridge wire, and the bridge wires of the at least three-phase coils are arranged at intervals along the circumference of the stator core and include a first-phase bridge wire, a second-phase bridge wire and a third-phase bridge wire; wherein the outer peripheral wall of the sub-core is provided with a wire groove for the bridge wire to pass through, and in the circumferential direction of the sub-core, the part of the sub-core located between two adjacent wire grooves is a core protrusion. The core protrusion located between the first-phase bridge wire and the second-phase bridge wire is the first core protrusion, the midpoint of the first core protrusion in the circumferential direction of the sub-core is the midpoint of the first protrusion, the line connecting the center of the sub-core and the midpoint of the first protrusion is the first radial reference line, the plane perpendicular to the first radial reference line is the first reference plane, the projection of the first core protrusion on the first reference plane is the first projection, the projection of the first-phase bridge wire on the first reference plane is the second projection, and the projection of the second-phase bridge wire on the first reference plane is the third projection. The maximum length of the first projection in the reference direction is less than the minimum distance between the second projection and the third projection, and the reference direction is perpendicular to the first radial reference line and perpendicular to the axial direction of the stator core.

[0010] According to the stator assembly of the embodiment of the present application, a wire groove for avoiding the bridge wire is provided on the outer peripheral wall of the stator core, and in the circumferential direction of the stator core, the projection of the first core protrusion on the first reference plane is a first projection, the projection of the first phase bridge wire on the first reference plane is a second projection, and the projection of the second phase bridge wire on the first reference plane is a third projection. The maximum length of the first projection in the reference direction is less than the minimum distance between the second projection and the third projection. This can make the assembly of the stator coil and the stator core more convenient, and can reduce the possibility of the stator core causing damage to the bridge wire during the assembly of the stator core and the stator coil; and can make the overall structure of the stator assembly more compact.

[0011] According to some embodiments of the present application, the projection of the wire-passing slot on the second reference plane is a fourth projection, the second reference plane is perpendicular to the axial direction of the stator core, and the fourth projection includes two slot sides arranged opposite to each other along the circumferential direction of the sub-core, and in the radial outward direction from the sub-core, the distance between the two slot sides of the fourth projection gradually increases.

[0012] According to some embodiments of the present application, at least a portion of the side of the groove is arc-shaped.

[0013] According to some embodiments of the present application, the fourth projection includes a groove bottom edge, the groove bottom edge is connected between the two groove side edges, and the groove bottom edge extends in a straight line.

[0014] According to some embodiments of the present application, a transition section is connected between the bottom edge of the groove and the side edge of the groove, and the transition section is arc-shaped.

[0015] According to some embodiments of the present application, along the radial direction of the sub-core, the bridge wire is completely accommodated in the corresponding wire slot.

[0016] According to some embodiments of the present application, the bridge wire is covered with an insulating layer.

[0017] According to some embodiments of the present application, the wire discs of the same phase and the bridge wires connecting them are integrally formed.

[0018] According to some embodiments of the present application, the plurality of sub-cores, the plurality of coils, and the bridge wires are bonded together by glue.

[0019] According to some embodiments of the present application, the stator assembly further includes an insulating bracket, which is disposed in the stator slot and covers the bobbin.

[0020] According to some embodiments of the present application, the insulating bracket includes a bracket body, which is annular and extends along the circumference of the stator core. A wire passing notch for the bridge wire is formed on the bracket body, and the wire passing notch is opposite to the wire passing slot in the axial direction of the stator core.

[0021] According to some embodiments of the present application, the insulating bracket also includes an extension portion, which is connected to the bracket body and located on an axial side of the wire-passing gap. At least a portion of the extension portion is located in the wire-passing slot and between the bridge wire and the sub-iron core.

[0022] According to some embodiments of the present application, the extension portion is recessed toward the center of the bracket body to form an accommodating groove for accommodating the bridge wire.

[0023] According to some embodiments of the present application, the maximum outer diameter of the bracket body is not greater than the maximum outer diameter of the sub-core.

[0024] According to some embodiments of the present application, in the circumferential direction of the bracket body, the portion of the bracket body located between two adjacent line notches is a bracket protrusion, the bracket protrusion located between the first phase bridge line and the second phase bridge line is a first bracket protrusion, and the projection of the first bracket protrusion on the first reference plane is the fifth projection, and the maximum length of the fifth projection in the reference direction is less than the minimum distance between the second projection and the third projection.

[0025] According to the second aspect of the present application, the linear motor includes: a stator assembly according to the first aspect of the present application; and a mover assembly, which is sleeved on the outer circumference of the stator assembly, and the mover assembly and the stator assembly can move relative to each other.

[0026] According to the linear motor of the embodiment of the present application, by setting the above-mentioned stator assembly, by setting the wire groove for avoiding the bridge wire on the outer peripheral wall of the stator core, and in the circumferential direction of the stator core, the projection of the first core protrusion on the first reference plane is the first projection, the projection of the first phase bridge wire on the first reference plane is the second projection, and the projection of the second phase bridge wire on the first reference plane is the third projection, and the maximum length of the first projection in the reference direction is less than the minimum distance between the second projection and the third projection, the assembly of the stator coil and the stator core can be made more convenient, and the possibility of the stator core causing damage to the bridge wire during the assembly of the stator core and the stator coil can be reduced; and the overall structure of the stator assembly can be made more compact.

[0027] The electromagnetic suspension according to the third embodiment of the present application includes: the linear motor according to the above-mentioned second embodiment of the present application.

[0028] According to the electromagnetic suspension of the embodiment of the present application, by setting the above-mentioned linear motor, by setting a wire groove for avoiding the bridge wire on the outer peripheral wall of the stator core, and in the circumferential direction of the stator core, the projection of the first core protrusion on the first reference plane is the first projection, the projection of the first phase bridge wire on the first reference plane is the second projection, and the projection of the second phase bridge wire on the first reference plane is the third projection, and the maximum length of the first projection in the reference direction is less than the minimum distance between the second projection and the third projection, the assembly of the stator coil and the stator core can be made more convenient, and the possibility of the stator core causing damage to the bridge wire during the assembly of the stator core and the stator coil can be reduced; and the overall structure of the stator assembly can be made more compact.

[0029] A vehicle according to an embodiment of the fourth aspect of the present application includes: an electromagnetic suspension according to an embodiment of the third aspect of the present application.

[0030] According to the vehicle of the embodiment of the present application, by setting the above-mentioned electromagnetic suspension, the electromagnetic suspension includes a linear motor, and the linear motor includes a stator assembly. By setting a wire groove for avoiding the bridge wire on the outer peripheral wall of the stator core, and in the circumferential direction of the stator core, the projection of the first core protrusion on the first reference plane is the first projection, the projection of the first phase bridge wire on the first reference plane is the second projection, and the projection of the second phase bridge wire on the first reference plane is the third projection, and the maximum length of the first projection in the reference direction is less than the minimum distance between the second projection and the third projection, the assembly of the stator coil and the stator core can be made more convenient, and the possibility of the stator core causing damage to the bridge wire during the assembly of the stator core and the stator coil can be reduced; and the overall structure of the stator assembly can be made more compact.

[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.

[0032] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0034] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0035] FIG1 is a cross-sectional view of a linear motor according to some embodiments of the present application;

[0036] FIG2 is a front view of the assembly of the stator assembly and the stator core shaft in the linear motor in FIG1 ;

[0037] FIG3 is a partial cross-sectional view of the stator assembly and the stator core shaft in the linear motor in FIG1 ;

[0038] FIG4 is an enlarged view of point A in FIG3 ;

[0039] FIG5 is a perspective schematic diagram of a stator assembly in the linear motor in FIG1 ;

[0040] FIG6 is a schematic diagram of the assembly of the stator coil, stator core and insulating bracket of the stator assembly in FIG1 ;

[0041] FIG7 is a perspective schematic diagram of the stator core of the stator assembly in FIG1 ;

[0042] FIG8 is a cross-sectional view of the stator core of the stator assembly in FIG1 ;

[0043] FIG9 is a top view of the stator core and the bridge wire of the stator assembly in FIG1 ;

[0044] FIG10 is a schematic diagram of an electromagnetic suspension according to some embodiments of the present application;

[0045] FIG. 11 is a schematic diagram of a vehicle according to some embodiments of the present application.

[0046] Figures: 10000, vehicle; 1000, electromagnetic suspension; 100, linear motor; 1a, stator assembly; 1, stator core; 11, sub-core; 111, core protrusion; 112, first core protrusion; 113, second core protrusion; 114, third core protrusion; 12, stator slot; 13, wire slot; 14, slot side; 15, slot bottom; 16, transition section; 2, stator coil; 21, coil; 22, bridge wire; 221, first phase bridge wire; 222, second phase bridge wire; 223, third phase bridge wire; 23, first phase coil; 24, second phase coil; 25, third phase coil; 3, insulating bracket; 31, bracket body; 32, extension; 33, receiving slot; 34, bracket protrusion; 341, First bracket protrusion; 342, second bracket protrusion; 343, third bracket protrusion; 35, wire notch; 41, mover assembly; 411, motor housing; 412, magnet; 51, first bearing; 52, second bearing; 53, stator core shaft; 531, guide channel; 54, oil seal; 55, guide rod. Specific embodiments

[0047] The following describes in detail embodiments of the present application. Examples of the embodiments 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 only used to explain the present application and are not to be construed as limiting the present application.

[0048] A stator assembly 1 a according to an embodiment of the present application will be described below with reference to FIG. 1 to FIG. 9 .

[0049] 3, 5, and 9, a stator assembly 1a according to an embodiment of the first aspect of the present application includes a stator core 1 and a stator coil 2. The stator core 1 includes a plurality of sub-cores 11 arranged in sequence along the axial direction, with stator slots 12 formed between adjacent sub-cores 11. The stator coil 2 is mounted on the stator core 1 and includes at least three-phase coils. Each phase coil includes a bobbin 21 and a bridge wire 22. The bobbin 21 is accommodated in the stator slot 12. Each stator slot 12 can accommodate a single layer of bobbin 21 or multiple layers of bobbin 21 arranged along the axial direction of the stator core 1. The bridge wires 22 can be located on the outer peripheral side of the stator core 1. The same phase wire discs 21 located in different stator slots 12 are connected by corresponding bridge wires 22. The bridge wires 22 of at least three-phase coils are arranged at intervals along the circumference of the stator core 1, and the bridge wires 22 include a first-phase bridge wire 221, a second-phase bridge wire 222 and a third-phase bridge wire 223.

[0050] Taking the stator assembly 1a for a three-phase linear motor as an example, the stator coil 2 of the stator assembly 1a includes three-phase coils, which are a first-phase coil 23, a second-phase coil 24 and a third-phase coil 25. Accordingly, the first-phase coil 23 can be a U-phase coil, the second-phase coil 24 can be a V-phase coil, and the third-phase coil 25 can be a W-phase coil. The first-phase coil 23 includes a first-phase bridge line 221, the second-phase coil 24 includes a second-phase bridge line 222, and the third-phase coil 25 includes a third-phase bridge line 223.

[0051] The first-phase bridge wires 221, second-phase bridge wires 222, and third-phase bridge wires 223 are arranged at intervals along the circumference of the stator core 1, with each first-phase bridge wire 221, second-phase bridge wire 222, and third-phase bridge wire 223 arranged at 120° angles. The coils 21 in the first-phase coil 23 are first-phase coils. The first-phase coils in the first-phase coil 23 located in different stator slots 12 are connected by the first-phase bridge wires 221. The coils 21 in the second-phase coil 24 are second-phase coils. The second-phase coils in the second-phase coil 24 located in different stator slots 12 are connected by the second-phase bridge wires 222. The coils 21 in the third-phase coil 25 are third-phase coils. The third-phase coils in the third-phase coil 25 located in different stator slots 12 are connected by the third-phase bridge wires 223.

[0052] The outer circumferential wall of the sub-core 11 is provided with a wire slot 13 for passing the bridge wire 22. The outer circumferential wall of the sub-core 11 can be provided with three wire slots 13 spaced apart along the circumference of the sub-core 11, namely a first phase wire slot, a second phase wire slot, and a third phase wire slot. The wire slots 13 facilitate the passage of the bridge wire 22 and provide some protection for the bridge wire 22, reducing the possibility of the bridge wire 22 protruding radially outward and scratching components external to the stator assembly 1a. Furthermore, the overall structure of the bridge wire 22 and the wire slots 13 can be made more compact, thereby making the overall structure of the stator assembly 1a more compact.

[0053] The plurality of sub-cores 11 include a first-phase sub-core, a second-phase sub-core, and a third-phase sub-core, which are arranged along the axial direction of the stator core 1 .

[0054] 9 , in the circumferential direction of the sub-core 11 , the portion of the sub-core 11 of each phase located between two adjacent wire slots 13 is the core protrusion 111 , the core protrusion 111 located between the first phase bridge wire 221 and the second phase bridge wire 222 is the first core protrusion 112 , the core protrusion 111 located between the second phase bridge wire 222 and the third phase bridge wire 223 is the second core protrusion 113 , and the core protrusion 111 located between the third phase bridge wire 223 and the first phase bridge wire 221 is the third core protrusion 114 .

[0055] The midpoint of the first core protrusion 112 in the circumferential direction of the sub-core 11 is the midpoint C of the first protrusion, the line connecting the center B of the sub-core 11 and the midpoint C of the first protrusion is the first radial reference line d, the plane perpendicular to the first radial reference line d is the first reference plane, the projection of the first core protrusion 112 on the first reference plane is the first projection, the projection of the first phase bridge line 221 on the first reference plane is the second projection, the projection of the second phase bridge line 222 on the first reference plane is the third projection, and the maximum length w1 of the first projection in the reference direction e is less than the maximum length between the second projection and the third projection. The small distance w2, the reference direction e perpendicular to the first radial reference line d and the reference direction e perpendicular to the axial direction of the stator core 1, can facilitate the first-phase bridge wire 221 and the second-phase bridge wire 222 to pass through two adjacent wire slots 13, thereby making the assembly of the stator core 1 and the stator coil 2 more convenient; and can reduce the possibility of the stator core 1 scratching the first-phase bridge wire 221 or the second-phase bridge wire 222 when the first-phase bridge wire 221 and the second-phase bridge wire 222 pass through two adjacent wire slots 13 during the assembly process of the stator core 1 and the stator coil 2.

[0056] Taking the stator assembly 1a for a three-phase linear motor as an example, the stator assembly 1a includes a first phase subassembly, a second phase subassembly and a third phase subassembly. The first phase subassembly includes a first phase coil 23 and a first phase sub-core. The first phase coil 23 includes a first phase wire cake and a first phase bridge wire 221. The first phase bridge wire 221 connects multiple first phase wire cakes arranged axially in sequence, and the first phase sub-core supports the first phase wire cake; the second phase subassembly includes a second phase coil 24 and a second phase sub-core. The second phase coil 24 includes a second phase wire cake and a second phase bridge wire 222. The second phase bridge wire 222 connects multiple second phase wire cakes arranged axially in sequence, and the second phase sub-core supports the second phase wire cake; the third phase subassembly includes a third phase coil 25 and a third phase sub-core. The third phase coil 25 includes a third phase wire cake and a third phase bridge wire 223. The third phase bridge wire 223 connects multiple third phase wire cakes arranged axially in sequence, and the third phase sub-core supports the third phase wire cake.

[0057] Each phase sub-core is provided with a first phase wire groove, a second phase wire groove and a third phase wire groove, and in the axial direction, all the first phase wire grooves correspond to each other, all the second phase wire grooves correspond to each other, and all the third wire grooves correspond to each other.

[0058] The first phase wire cakes, the second phase wire cakes and the third phase wire cakes are arranged in sequence along the axial direction, three in a group, and multiple groups are arranged in sequence along the axial direction. For example, the first phase coil 23 has four first phase wire cakes, the second phase coil 24 has four second phase wire cakes, and the third phase coil 25 has four third phase wire cakes. Then the first phase wire cakes, the second phase wire cakes and the third phase wire cakes are arranged in sequence along the axial direction in four groups.

[0059] During assembly, first radially insert the second phase subassembly into the first phase subassembly and reserve space for the third phase subassembly to be inserted. After the second phase subassembly and the first phase subassembly are assembled, the first phase bridge line 221 and the second phase bridge line 222 are distributed at 120°, and the first phase bridge line 221 and the second phase bridge line 222 are respectively located in the first phase bridge groove and the second phase bridge groove. When the third phase subassembly is inserted, the first core protrusion 112 between the first phase bridge groove and the second phase bridge groove on the third phase sub-core needs to be inserted into the space between the first phase bridge line 221 and the second phase bridge line 222. During the insertion process, the first core protrusion 112 on the third phase sub-core does not contact the first phase bridge line 221 and the second phase bridge line 222.

[0060] The specific assembly process is described as follows:

[0061] First, the first phase coil 23, the second phase coil 24 and the third phase coil 25 are manufactured respectively;

[0062] The first phase wire cake in the first phase coil 23 is installed to the first phase sub-core, the first phase sub-core supports the first phase wire cake, the first phase bridge wire 221 passes through the first phase wire groove, and is assembled with the first phase sub-core to form a first phase sub-assembly. The first phase bridge wire 221 passes through the first phase wire groove, which can reduce the scratching of the first phase sub-core on the first phase bridge wire 221; the second phase wire cake in the second phase coil 24 is installed to the second phase sub-core, the second phase sub-core supports the second phase wire cake, the second phase bridge wire 222 passes through the second phase wire groove, and is assembled with the first phase sub-core to form a first phase sub-assembly. The second-phase sub-core is assembled to form a second-phase sub-assembly, and the second-phase bridge wire 222 is passed through the second-phase wire groove, which can reduce the second-phase sub-core from scratching the second-phase bridge wire 222; the third-phase wire disc in the third-phase coil 25 is installed to the third-phase sub-core, and the third-phase sub-core supports the third-phase wire disc. The third-phase bridge wire 223 is passed through the third-phase wire groove, and assembled with the third-phase sub-core to form a third-phase sub-assembly. The third-phase bridge wire 223 is passed through the third-phase wire groove, which can reduce the third-phase sub-core from scratching the third-phase bridge wire 223;

[0063] Secondly, the second phase subassembly is inserted into the first phase subassembly along the radial direction of the stator core 1 and space is reserved for the insertion of the third phase subassembly to complete the assembly of the first phase subassembly and the second phase subassembly. At this time, the first phase bridge line 221 and the second phase bridge line 222 are arranged at 120° and the first phase bridge line 221 and the second phase bridge line 222 are respectively located in the first phase wire slot and the second phase wire slot.

[0064] Finally, the third phase sub-assembly is inserted between the assembled first phase sub-assembly and the second phase sub-assembly along the radial direction of the stator core 1. The first core protrusion 112 between the first phase wire slot and the second phase wire slot on the third phase sub-core needs to pass through the space between the first phase bridge wire 221 and the second phase bridge wire 222. During the insertion process, the first core protrusion 112 of the third phase sub-core does not contact the first phase bridge wire 221 and the second phase bridge wire 222.

[0065] By making the maximum length w1 of the first projection of the first core protrusion 112 on the first reference plane in the reference direction smaller than the minimum distance w2 between the second projection of the first phase bridge wire 221 on the first reference plane and the second projection of the second phase bridge wire 222 on the first reference plane, the first core protrusion 112 of the third phase sub-core can be prevented from contacting the first phase bridge wire 221 and the second phase bridge wire 222 during the process of inserting the third phase sub-assembly between the assembled first phase sub-assembly and the second phase sub-assembly along the radial direction of the stator core 1, thereby making the assembly of the third phase sub-assembly on the first phase sub-assembly and the second phase sub-assembly more efficient, and reducing the scratching of the first phase bridge wire 221 or the second phase bridge wire 222 by the third phase sub-core during the plugging process of the third phase sub-assembly between the first phase sub-assembly and the second phase sub-assembly.

[0066] In the description of this application, “plurality” means two or more.

[0067] According to the stator assembly 1a of the embodiment of the present application, a wire groove 13 for avoiding the bridge wire 22 is provided on the outer peripheral wall of the stator core 1, and in the circumferential direction of the stator core 1, the projection of the first core protrusion 112 on the first reference plane is a first projection, the projection of the first phase bridge wire 221 on the first reference plane is a second projection, and the projection of the second phase bridge wire 222 on the first reference plane is a third projection. The maximum length of the first projection in the reference direction is less than the minimum distance between the second projection and the third projection, which can make the assembly of the stator coil 2 and the stator core 1 more convenient, and can reduce the possibility of the stator core 1 causing damage to the bridge wire 22 during the assembly of the stator core 1 and the stator coil 2; and can make the overall structure of the stator assembly 1a more compact.

[0068] 7 and 9 , according to some embodiments of the present application, the projection of the wire passing slot 13 on the second reference plane is a fourth projection, the second reference plane is perpendicular to the axial direction of the stator core 1, and the fourth projection includes two slot side edges 14 that are oppositely arranged along the circumferential direction of the sub-core 11. In the radial outward direction from the sub-core 11, the spacing between the two slot side edges 14 of the fourth projection gradually increases, so that the slot opening of the wire passing slot 13 can be expanded and open, making it more convenient for the bridge line 22 connecting the same phase line cake 21 to pass through the wire passing slot 13, and reducing the possibility of the bridge line 22 scratching the stator core 1 when passing through the wire passing slot 13.

[0069] 7 and 9 , according to some embodiments of the present application, at least a portion of the slot side 14 is arc-shaped, which can reduce scratches on the stator core 1 when the bridge wire 22 passes through the wire slot 13 during the assembly of the stator core 1 and the stator coil 2 .

[0070] The fact that at least part of the groove side 14 is arc-shaped may include the following situations: for example, the entire groove side 14 is arc-shaped; for another example, a part of the groove side 14 is arc-shaped.

[0071] 7 and 9 , according to some embodiments of the present application, the fourth projection includes a slot bottom edge 15 , which is connected between the two slot side edges 14 , and the slot bottom edge 15 extends in a straight line. For example, the slot bottom edge 15 extends in a straight line along the circumference of the sub-core 11 , and the bridge wire 22 is flat, which facilitates the bridge wire 22 to pass through the wire slot 13 , thereby reducing scratches on the bridge wire 22 by the stator core 1 .

[0072] 7 and 9 , according to some embodiments of the present application, a transition section 16 is connected between the slot bottom edge 15 and the slot side edge 14 , and the transition section 16 is arc-shaped, so that the slot side edge 14 and the slot bottom edge 15 of the wire slot 13 have a smooth transition, which can reduce the scratches caused by the bridge wire 22 on the stator core 1 when passing through the wire slot 13 during assembly of the stator core 1 and the stator coil 2.

[0073] 5 and 6 , according to some embodiments of the present application, along the radial direction of the sub-core 11, the bridge wires 22 are completely contained within the corresponding wire slots 13. For example, the projection of the wire slots 13 on the second reference plane is located within the projection of the corresponding wire slots 13 on the second reference plane, where the second reference plane is perpendicular to the axial direction of the stator core axis 53. By completely containing the bridge wires 22 within the corresponding wire slots 13 along the radial direction of the sub-core 11, the overall structure of the bridge wires 22 and the stator core 1 is compact, and the bridge wires 22 are prevented from protruding outward in the radial direction of the stator core 1 and scratching external components.

[0074] According to some embodiments of the present application, the bridge wire 22 is covered with an insulating layer, which can insulate the bridge wire 22 and prevent the bridge wire 22 from directly contacting the sub-iron core 11 and forming an electrical connection; and the insulating layer can protect the bridge wire 22 and prevent the stator core 1 from scratching the bridge wire 22 during the assembly of the stator coil 2 and the stator core 1.

[0075] 5 and 6 , according to some embodiments of the present application, the same phase wire die 21 and the bridge wire 22 connecting the same phase wire die 21 are integrally formed, which can enhance the overall structural strength of the stator coil 2; and, since the same phase wire die 21 is connected via the bridge wire 22, the same phase wire die 21 and the bridge wire 22 connecting the same phase wire die 21 are integrally formed, which can omit the step of welding the same phase wire die 21 and the bridge wire 22 connecting the same phase wire die 21 during the assembly process of the stator coil 2, thereby improving the assembly efficiency of the stator coil 2.

[0076] Referring to FIG. 2 , according to some embodiments of the present application, multiple sub-cores 11, multiple bobbins 21, and bridge wires 22 are bonded together using glue. The multiple sub-cores 11, multiple bobbins 21, and bridge wires 22 are assembled to form a stator assembly 1a. Bonding the entire stator assembly 1a together using glue can improve the overall structural strength of the stator assembly 1a and the stability of the connections between the multiple sub-cores 11, multiple bobbins 21, and bridge wires 22. For example, during operation of the linear motor 100, the possibility of the bridge wires 22 falling off due to vibration of the linear motor 100 can be reduced. Furthermore, an insulating protective layer can be formed for the entire stator assembly 1a, providing all-round protection for the entire stator assembly 1a.

[0077] Optionally, a colloid is provided between two adjacent turns of the wire in the coil 21 , which can further insulate the two adjacent turns of the wire in the coil 21 and also fix the coil.

[0078] 5 and 6 , according to some embodiments of the present application, the stator assembly 1a further includes an insulating bracket 3 , which is disposed in the stator slots 12 and covers the bobbin 21 . The insulating bracket 3 is located within the stator slots 12 and covers the bobbin 21 , thereby insulating and protecting the bobbin 21 within the stator slots 12 and preventing direct electrical contact between the bobbin 21 and the stator core 1 .

[0079] 5 and 6 , according to some embodiments of the present application, the insulating bracket 3 includes a bracket body 31, which is annular and extends along the circumference of the stator core 1. A wire passing notch 35 for the bridge wire 22 is formed on the bracket body 31. The wire passing notch 35 is opposite to the wire passing slot 13 in the axial direction of the stator core 1. The wire passing notch 35 can provide a way for the bridge wire 22 to be accommodated and avoided, so that the bridge wire 22 can pass through the wire passing notch 35, and the overall structure of the bridge wire 22 and the insulating bracket 3 is compact, thereby preventing the bridge wire 22 from protruding outward in the radial direction of the stator core 1 and scratching external components.

[0080] 5 and 6 , according to some embodiments of the present application, the insulating bracket 3 further includes an extension portion 32 , which is connected to the bracket body 31 and is located on one axial side of the wire-passing notch 35 , at least a portion of the extension portion 32 is located in the wire-passing slot 13 and the extension portion 32 is located between the bridge wire 22 and the sub-iron core 11 , and the extension portion 32 can insulate the bridge wire 22 , thereby preventing the bridge wire 22 from directly contacting and electrically connecting with the sub-iron core 11 ; and the extension portion 32 can protect the bridge wire 22 , thereby reducing the possibility of the stator core 1 scratching the bridge wire 22 during the assembly process of the stator coil 2 and the stator core 1 .

[0081] Among them, at least part of the extension portion 32 is located in the wire groove 13, which may include the following situations: for example, the entire extension portion 32 is located in the wire groove 13; for another example, a part of the extension portion 32 is located in the wire groove 13.

[0082] 5 and 6 , according to some embodiments of the present application, the extension portion 32 is recessed toward the center of the bracket body 31 to form a receiving slot 33 for accommodating the bridge cable 22. The receiving slot 33 provides a space for the bridge cable 22, facilitating its passage through the receiving slot 33 and ensuring a compact overall structure of the bridge cable 22 and the extension portion 32.

[0083] 4-6 , according to some embodiments of the present application, the maximum outer diameter of the bracket body 31 is no greater than the maximum outer diameter of the sub-core 11, which can ensure that the bracket body 31 does not protrude from the sub-core 11, and can avoid interference between the bracket body 31 and components outside the sub-core 11, so that the overall structure of the bracket body 31 and the sub-core 11 is compact, thereby making the overall structure of the insulating bracket 3 and the stator core 1 compact.

[0084] 4-6 , according to some embodiments of the present application, in the circumferential direction of the bracket body 31 , the portion of the bracket body 31 located between two adjacent line notches 35 is a bracket protrusion 34 , the bracket protrusion 34 located between the first phase bridge line 221 and the second phase bridge line 222 is a first bracket protrusion 341 , the bracket protrusion 34 located between the second phase bridge line 222 and the third phase bridge line 223 is a second bracket protrusion 342 , and the bracket protrusion 34 located between the third phase bridge line 223 and the first phase bridge line 221 is a third bracket protrusion 343 .

[0085] The projection of the first bracket protrusion 341 on the first reference plane is the fifth projection, and the maximum length of the fifth projection in the reference direction e is less than the minimum distance w2 between the second projection and the third projection. This can facilitate the assembly of the first bracket protrusion 341 between the first phase bridge wire 221 and the second phase bridge wire 222, thereby improving the assembly efficiency between the stator coil 2 and the insulating bracket 3; and can make the overall structure of the stator assembly 1a more compact.

[0086] The insulating support 3 covering the first phase wire bobbin is the first insulating support, the insulating support 3 covering the second phase wire bobbin is the second insulating support, and the insulating support 3 covering the third phase wire bobbin is the third insulating support.

[0087] Taking the stator assembly 1a for a three-phase linear motor as an example, the stator assembly 1a includes a first phase subassembly, a second phase subassembly and a third phase subassembly. The first phase subassembly includes a first phase coil 23, a first phase sub-core and a first insulating bracket. The first phase coil 23 includes a first phase wire cake and a first phase bridge wire 221. The first phase bridge wire 221 connects a plurality of first phase wire cakes arranged axially in sequence. The first phase sub-core supports the first phase wire cake and the first insulating bracket; the second phase subassembly includes a second phase coil 24 and a second phase sub-core. The second phase coil 24 includes a second phase wire cake, a second phase bridge wire 222 and a second insulating bracket. The second phase bridge wire 222 connects multiple second phase wire cakes arranged axially in sequence. The second phase sub-core supports the second phase wire cake and the second insulating bracket. The third phase sub-assembly includes a third phase coil 25, a third phase sub-core and a third insulating bracket. The third phase coil 25 includes a third phase wire cake and a third phase bridge wire 223. The third phase bridge wire 223 connects multiple third phase wire cakes arranged axially in sequence. The third phase sub-core supports the third phase wire cake and the third insulating bracket.

[0088] The assembly process of the stator coil 2 and the stator core 1 of the stator assembly 1a is described as follows, wherein:

[0089] First, the first phase coil 23, the second phase coil 24 and the third phase coil 25 are manufactured respectively;

[0090] The first insulating bracket is wrapped around the first phase wire disc in the first phase coil 23, and the first phase bridge wire 221 is passed through the wire passing notch 35 of the first insulating bracket. The first phase wire disc in the first phase coil 23 wrapped by the first insulating bracket is installed on the first phase sub-core. The first phase sub-core supports the first phase wire disc and the first insulating bracket, and is assembled with the first phase sub-core to form a first phase sub-assembly. The first phase bridge wire 221 is passed through the first phase wire passing slot.

[0091] The second insulating bracket is wrapped around the second phase wire disc in the second phase coil 24, and the second phase bridge wire 222 is passed through the wire passing notch 35 of the second insulating bracket. The second phase wire disc in the second phase coil 24 wrapped by the second insulating bracket is installed on the second phase sub-core. The second phase sub-core supports the second phase wire disc and the second insulating bracket, and is assembled with the second phase sub-core to form a second phase sub-assembly. The second phase bridge wire 222 is passed through the second phase wire passing slot.

[0092] The third insulating bracket is wrapped around the third phase wire disc in the third phase coil 25, and the third phase bridge wire 223 is passed through the wire passing notch 35 of the third insulating bracket. The third phase wire disc in the third phase coil 25 wrapped by the third insulating bracket is installed on the third phase sub-core. The third phase sub-core supports the third phase wire disc and the third insulating bracket, and is assembled with the third phase sub-core to form a third phase sub-assembly. The third phase bridge wire 223 is passed through the third phase wire passing slot.

[0093] Secondly, the second phase subassembly is inserted into the first phase subassembly along the radial direction of the stator core 1 and space is reserved for the insertion of the third phase subassembly to complete the assembly of the first phase subassembly and the second phase subassembly. At this time, the first phase bridge line 221 and the second phase bridge line 222 are arranged at 120° and the first phase bridge line 221 and the second phase bridge line 222 are respectively located in the first phase wire slot and the second phase wire slot.

[0094] Finally, the third phase sub-assembly is inserted between the assembled first phase sub-assembly and the second phase sub-assembly along the radial direction of the stator core 1. The first core protrusion 112 between the first phase wire slot and the second phase wire slot on the third phase sub-core needs to pass through the space between the first phase bridge wire 221 and the second phase bridge wire 222, and the first core protrusion 112 of the third phase sub-core does not contact the first phase bridge wire 221 and the second phase bridge wire 222, and the first bracket protrusion 341 of the third insulating bracket of the third phase sub-assembly needs to pass through the space between the first phase bridge wire 221 and the second phase bridge wire 222. The assembly of the third phase sub-assembly with the first phase sub-assembly and the second phase sub-assembly is completed. At this time, the first phase bridge wire 221, the second phase bridge wire 222 and the third phase bridge wire 223 are arranged at intervals along the circumference of the stator core 1.

[0095] By ensuring that the maximum length w1 of the first projection of the first core protrusion 112 on the first reference plane in the reference direction is less than the minimum distance w2 between the second projection of the first phase bridge wire 221 on the first reference plane and the third projection of the second phase bridge wire 222 on the first reference plane, the first core protrusion 112 of the third phase sub-core can be easily passed through the space between the first phase bridge wire 221 and the second phase bridge wire 222, thereby making the assembly of the third phase sub-assembly on the first phase sub-assembly and the second phase sub-assembly more efficient; it can also reduce the scratching of the first phase bridge wire 221 or the second phase bridge wire 222 by the third phase sub-core during the plugging process of the third phase sub-assembly into the first phase sub-assembly and the second phase sub-assembly.

[0096] Furthermore, by having the maximum length of the fifth projection of the first bracket protrusion 341 on the first reference plane in the reference direction e be less than the minimum distance w2 between the second projection of the first phase bridge line 221 on the first reference plane and the third projection of the second phase bridge line 222 on the first reference plane, the first bracket protrusion 341 of the insulating bracket 3 of the third phase subassembly can be facilitated to pass through the space between the first phase bridge line 221 and the second phase bridge line 222, thereby making the assembly of the third phase subassembly on the first phase subassembly and the second phase subassembly more efficient.

[0097] Referring to Figure 1 , a linear motor 100 according to an embodiment of the second aspect of the present application includes a stator assembly 1a and a mover assembly 41 according to the embodiment of the first aspect of the present application. The mover assembly 41 is disposed around the outer periphery of the stator assembly 1a, and the mover assembly 41 and the stator assembly 1a are capable of relative movement. When the linear motor 100 is in operation, the stator assembly 1a and the mover assembly 41 can move relative to each other along the axial direction of the linear motor 100.

[0098] Optionally, according to one embodiment of the present application, the linear motor 100 includes a mover assembly 41, a stator assembly 1a, a stator core shaft 53, a guide rod 55, a first bearing 51, a second bearing 52, and an oil seal 54. The stator assembly 1a is sleeved around the outer periphery of the stator core shaft 53 and is fixed relative to the stator core shaft 53. The mover assembly 41 is sleeved around the outer periphery of the stator assembly 1a. The mover assembly 41 and the stator assembly 1a are relatively movable along the axial direction of the stator core shaft 53. The first bearing 51 and the oil seal 54 are mounted on the mover assembly 41 and sleeved around the outer periphery of the stator core shaft 53. The first bearing 51 cooperates with the stator core shaft 53 to support the stator core shaft 53, thereby enhancing the stability of the stator core shaft 53 and reducing vibration generated by the stator core shaft 53 during operation of the linear motor 100. The oil seal 54 can prevent external impurities (such as dust and moisture) from entering the interior of the linear motor 100, thereby protecting the internal environment of the linear motor 100.

[0099] The mover assembly 41 includes a motor housing 411, which is fixed to the inner wall of the motor housing 411. A guide rod 55 is provided in the motor housing 411 and extends axially along the stator core shaft 53. A guide channel 531 extending axially along the stator core shaft 53 is formed on the stator core shaft 53. The guide rod 55 is slidably accommodated in the guide channel 531 along the axial direction of the stator assembly 1a. The guide rod 55 can guide the movement of the mover assembly 41. The cooperation between the guide channel 531 and the guide rod 55 can guide and limit the movement of the guide rod 55, ensuring that the guide rod 55 moves along a set direction and a set trajectory, and preventing the guide rod 55 from separating from the stator core shaft 53 during the sliding process, thereby ensuring that the mover assembly 41 moves along a set direction and a set trajectory.

[0100] The second bearing 52 is located within the guide channel 531 and is sleeved around the outer circumference of the guide rod 55. The second bearing 52 is mounted on the stator core shaft 53. The second bearing 52 is mounted on the stator core shaft 53 and cooperates with the stator core shaft 53 to support the stator core shaft 53. This can enhance the stability of the stator core shaft 53 and reduce vibration generated by the stator core shaft 53 during operation of the linear motor 100.

[0101] Among them, when the linear motor 100 is working, the stator assembly 1a and the mover assembly 41 can generate relative movement along the axial direction of the linear motor 100, including the following situations: for example, when the linear motor 100 is working, the stator assembly 1a is stationary, and the mover assembly 41 moves along the axial direction of the linear motor 100; for another example, the mover assembly 41 is stationary, and the stator assembly 1a moves along the axial direction of the linear motor 100; for another example, both the stator assembly 1a and the mover assembly 41 move along the axial direction of the linear motor 100.

[0102] Optionally, the mover assembly 41 may be a primary assembly and the stator assembly 1a may be a secondary assembly; alternatively, the mover assembly 41 may be a secondary assembly and the stator assembly 1a may be a primary assembly.

[0103] Optionally, the movable component 41 may be a primary component and the stator component 1a may be a secondary component. In this case, the movable component 41 includes a motor housing 411, a stator core 1 and a stator coil 2. The stator core 1 is fixed to the motor housing 411, the stator coil 2 is arranged on the stator core 1, and the stator component 1a includes a magnet 412. Alternatively, the movable component 41 may be a secondary component and the stator component 1a may be a primary component. The movable component 41 includes a motor housing 411 and a magnet 412. The magnet 412 is installed on the inner wall of the motor housing 411. The stator component 1a includes a stator core 1 and a stator coil 2. The stator coil 2 is installed on the stator core 1.

[0104] According to the linear motor 100 of the embodiment of the present application, by setting the above-mentioned stator assembly 1a, by setting a wire groove 13 for avoiding the bridge wire 22 on the outer peripheral wall of the stator core 1, and in the circumferential direction of the stator core 1, the projection of the first core protrusion 112 on the first reference plane is the first projection, the projection of the first phase bridge wire 221 on the first reference plane is the second projection, and the projection of the second phase bridge wire 222 on the first reference plane is the third projection, and the maximum length of the first projection in the reference direction is less than the minimum distance between the second projection and the third projection, the assembly of the stator coil 2 and the stator core 1 can be made more convenient, and the possibility of the stator core 1 causing damage to the bridge wire 22 during the assembly of the stator core 1 and the stator coil 2 can be reduced; and the overall structure of the stator assembly 1a can be made more compact.

[0105] Referring to Figure 10 , an electromagnetic suspension system 1000 according to an embodiment of the third aspect of the present application includes a linear motor 100 according to an embodiment of the second aspect of the present application. When this linear motor 100 is used in the electromagnetic suspension system 1000 of a vehicle 10000, the stator assembly 1a can be connected to the vehicle body, and the mover assembly 41 can be connected to the wheels. For example, the upper end of the stator assembly 1a can be connected to the vehicle body, and the lower end of the mover assembly 41 can be connected to the wheels.

[0106] According to the electromagnetic suspension 1000 of the embodiment of the present application, by setting the above-mentioned linear motor 100, the linear motor 100 includes a stator assembly 1a, and by setting a wire groove 13 for avoiding the bridge wire 22 on the outer peripheral wall of the stator core 1, and in the circumferential direction of the stator core 1, the projection of the first core protrusion 112 on the first reference plane is the first projection, the projection of the first phase bridge wire 221 on the first reference plane is the second projection, and the projection of the second phase bridge wire 222 on the first reference plane is the third projection, and the maximum length of the first projection in the reference direction is less than the minimum distance between the second projection and the third projection, which can make the assembly of the stator coil 2 and the stator core 1 more convenient, and can reduce the possibility of the stator core 1 causing damage to the bridge wire 22 during the assembly of the stator core 1 and the stator coil 2; and can make the overall structure of the stator assembly 1a more compact.

[0107] 11 , a vehicle 10000 according to an embodiment of the fourth aspect of the present application includes an electromagnetic suspension 1000 according to an embodiment of the third aspect of the present application.

[0108] According to the vehicle 10000 of the embodiment of the present application, by setting the above-mentioned electromagnetic suspension 1000, the electromagnetic suspension 1000 includes a linear motor 100, and the linear motor 100 includes a stator assembly 1a. By setting a wire groove 13 for avoiding the bridge wire 22 on the outer peripheral wall of the stator core 1, and in the circumferential direction of the stator core 1, the projection of the first core protrusion 112 on the first reference plane is a first projection, the projection of the first phase bridge wire 221 on the first reference plane is a second projection, and the projection of the second phase bridge wire 222 on the first reference plane is a third projection, and the maximum length of the first projection in the reference direction is less than the minimum distance between the second projection and the third projection, the assembly of the stator coil 2 and the stator core 1 can be made more convenient, and the possibility of the stator core 1 causing damage to the bridge wire 22 during the assembly of the stator core 1 and the stator coil 2 can be reduced; and the overall structure of the stator assembly 1a can be made more compact.

[0109] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," 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 illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0110] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A stator assembly (1a), wherein: include: A stator core (1) comprises a plurality of sub-cores (11) arranged in sequence along the axial direction, with a stator slot (12) formed between two adjacent sub-cores (11); A stator coil (2) is mounted on the stator core (1) and includes at least three-phase coils, each phase coil includes a coil (21) and a bridge wire (22), the coil (21) is accommodated in the stator slot (12), the coils (21) of the same phase located in different stator slots (12) are connected via corresponding bridge wires (22), the bridge wires (22) of the at least three-phase coils are arranged at intervals along the circumference of the stator core (1) and include a first-phase bridge wire (221), a second-phase bridge wire (222), and a third-phase bridge wire (223); The outer peripheral wall of the sub-iron core (11) is provided with a wire groove (13) for the wire passing of the bridge wire (22); in the circumferential direction of the sub-iron core (11), the portion of the sub-iron core (11) located between two adjacent wire grooves (13) is a core convex portion (111); the core convex portion (111) located between the first phase bridge wire (221) and the second phase bridge wire (222) is a first core convex portion (112); the midpoint of the first core convex portion (112) in the circumferential direction of the sub-iron core (11) is the midpoint of the first convex block; the center of the sub-iron core (11) is aligned with the center of the sub-iron core (11). The line connecting the midpoints of the first convex blocks is a first radial reference line, the plane perpendicular to the first radial reference line is a first reference plane, the projection of the first core convex portion (112) on the first reference plane is a first projection, the projection of the first phase bridge line (221) on the first reference plane is a second projection, the projection of the second phase bridge line (223) on the first reference plane is a third projection, the maximum length of the first projection in the reference direction is less than the minimum distance between the second projection and the third projection, and the reference direction is perpendicular to the first radial reference line and perpendicular to the axial direction of the stator core (1).

2. The stator assembly (1a) according to claim 1, wherein The projection of the wire-passing slot (13) on the second reference plane is a fourth projection, the second reference plane is perpendicular to the axial direction of the stator core (1), the fourth projection includes two slot side edges (14) arranged along the circumferential direction of the sub-core (11), and the distance between the two slot side edges (14) of the fourth projection gradually increases in the radial outward direction of the sub-core (11).

3. The stator assembly (1a) according to claim 2, wherein: At least part of the groove side (14) is arc-shaped.

4. The stator assembly (1a) according to claim 2, wherein The fourth projection comprises a groove bottom edge (15), the groove bottom edge (15) is connected between the two groove side edges (14), and the groove bottom edge (15) extends in a straight line.

5. The stator assembly (1a) according to claim 4, wherein A transition section (16) is connected between the groove bottom edge (15) and the groove side edge (14), and the transition section (16) is arc-shaped.

6. The stator assembly (1a) according to claim 1, wherein Along the radial direction of the sub-iron core (11), the bridge wire (22) is completely accommodated in the corresponding wire groove (13).

7. The stator assembly (1a) according to claim 1, wherein The bridge wire (22) is covered with an insulating layer.

8. The stator assembly (1a) according to claim 1, wherein The wire disc (21) of the same phase and the bridge wire (22) connected thereto are integrally formed.

9. The stator assembly (1a) according to claim 1, wherein: The plurality of sub-iron cores (11), the plurality of coils (21) and the bridge wire (22) are bonded together by adhesive.

10. The stator assembly (1a) according to any one of claims 1 to 9, wherein: It also includes an insulating bracket (3), which is arranged in the stator slot (12) and covers the coil (21).

11. The stator assembly (1a) according to claim 10, wherein: The insulating bracket (3) comprises a bracket body (31), the bracket body (31) is annular and extends along the circumference of the stator core (1), and a wire passing notch (35) for the bridge wire (22) to pass through is formed on the bracket body (31), and the wire passing notch (35) is opposite to the wire passing slot (13) in the axial direction of the stator core (1).

12. The stator assembly (1a) according to claim 11, wherein The insulating bracket further includes an extension portion (32), the extension portion (32) being connected to the bracket body (31) and being located on one axial side of the wire-passing notch (35), and at least a portion of the extension portion (32) being located within the wire-passing slot (13) and between the bridge wire (22) and the sub-iron core (11).

13. The stator assembly (1a) according to claim 12, wherein: The extension portion (32) is recessed toward the center of the bracket body (31) to form an accommodating groove (33) for accommodating the bridge wire (22).

14. The stator assembly (1a) according to claim 11, wherein The maximum outer diameter of the bracket body (31) is not greater than the maximum outer diameter of the sub-iron core (11).

15. The stator assembly (1a) according to claim 11, wherein In the circumferential direction of the bracket body (31), the portion of the bracket body (31) located between two adjacent crossing line notches (35) is a bracket protrusion (34), the bracket protrusion (34) located between the first phase bridge line (221) and the second phase bridge line (222) is a first bracket protrusion (341), and the projection of the first bracket protrusion (341) on the first reference plane is a fifth projection, and the maximum length of the fifth projection in the reference direction is less than the minimum distance between the second projection and the third projection.

16. A linear motor (100), wherein: include: The stator assembly (1a) according to any one of claims 1 to 15; The movable subassembly (41) is sleeved on the outer periphery of the stator subassembly (1a), and the movable subassembly (41) and the stator subassembly (1a) are capable of relative movement.

17. An electromagnetic suspension (1000), wherein: include: The linear motor (100) according to claim 16.

18. A vehicle (10000), wherein: include: The electromagnetic suspension (1000) according to claim 17.

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