Stator core and electric machine

Abstract

The utility model provides a kind of stator core and motor, it is related to motor technical field, the technical problem that weak mechanical strength and the noise vibration of large after assembly caused by the numerous punched sheet of block type motor stator of existing technology is solved.The stator core and motor include annular base and movable punched sheet, annular base includes base main body and the integrally formed setting of several fixed punched sheet with base main body, movable punched sheet is detachably set between two adjacent fixed punched sheet, to make any adjacent fixed punched sheet and movable punched sheet form stator slot.The utility model is used to provide a kind of stator core and motor with simplified process, optimized magnetic circuit, reduce noise, improve mechanical strength and rigidity.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a stator core and a motor. Background Technology

[0002] Modular stator cores improve material utilization and facilitate winding by dividing the entire stator into sections. Traditional splicing methods completely divide the stator at the centerline of each stator slot. This means that for an M-slot motor, M independent modules need to be manufactured and assembled, each module consisting of a tooth and a yoke section. Therefore, this results in problems such as a large number of modules, large cumulative errors, weak mechanical strength, and impaired magnetic circuit performance. Utility Model Content

[0003] The purpose of this utility model is to provide a stator core and motor to solve the technical problems of weak mechanical strength and high noise and vibration after assembly caused by the large number of stator laminations in the existing modular motors. The various technical effects of the preferred technical solutions provided by this utility model are detailed below.

[0004] To achieve the above objectives, the present invention provides the following technical solution: The stator core provided by this utility model includes an annular base and movable laminations. The annular base includes a base body and a plurality of fixed laminations integrally formed with the base body. The movable laminations are detachably disposed between two adjacent fixed laminations so that a stator slot is formed between any adjacent fixed laminations and the movable laminations.

[0005] As an optional implementation, one of a splicing block and a splicing groove is provided at one end of the fixed stamping in the circumferential direction, and the other of a splicing groove and a splicing block is provided at one end of the movable stamping in the circumferential direction. The splicing block and the splicing groove cooperate with each other, and adjacent fixed stampings and movable stampings are detachably connected through the splicing block and the splicing groove.

[0006] As an optional implementation, the fixing piece includes a fixing tooth and a fixing yoke, the fixing yoke being connected to the radially outer side of the fixing tooth, and the splicing block and the splicing groove being respectively provided at both ends of the circumferential direction of the fixing yoke.

[0007] As an optional implementation, the movable lamination includes a movable tooth and a movable yoke, the movable yoke being connected to the radially outer side of the movable tooth, and the splicing block and the splicing groove being respectively provided at both ends of the movable yoke in the circumferential direction.

[0008] As an optional implementation, the radial thickness of the fixed yoke and the movable yoke is W2, and the total radial thickness of the base body and the fixed yoke is W1, where 0.3W1≤W2≤0.7W1.

[0009] As an optional implementation, the radial thickness of the splicing block is W3, where 0.35W2≤W3≤0.65W2.

[0010] As an optional implementation, the circumferential thickness of the splicing block is H, where 0.2W2≤H<W2; and / or, the splicing block includes a long strip segment and a semi-cylindrical segment, wherein the radius of the semi-cylindrical segment is R1, where 0≤R1<0.38W2.

[0011] As an optional implementation, the fixed tooth and the fixed yoke have the same structure and size, and the fixed yoke and the movable yoke have the same structure and size; and / or, the fixed punch and the movable punch have a T-shaped structure.

[0012] As an optional implementation, the fixing piece is provided with stress holes.

[0013] An electric motor, comprising a stator core as described above.

[0014] The beneficial effects of this utility model are as follows: The stator core and motor provided by this utility model include an annular base and movable laminations. The annular base includes a base body and a plurality of fixed laminations integrally formed with the base body. The movable laminations are detachably disposed between two adjacent fixed laminations, so that a stator slot is formed between any adjacent fixed lamination and the movable lamination. The movable laminations and fixed laminations are detachably connected, which can significantly improve the winding utilization rate and solve the problem of low winding utilization rate in the prior art. At the same time, the magnetic induction lines can still maintain good continuity at the junction of the movable laminations and fixed laminations, significantly improving the winding efficiency. This design reduces cogging torque, torque ripple, and back EMF harmonics, optimizes the magnetic circuit, reduces magnetic reluctance, and improves the electromagnetic performance and efficiency of the motor. By integrally molding several fixed laminations with the base body, the number of assembly blocks required is significantly reduced, simplifying the assembly process, and the reduced number of blocks also reduces cumulative errors. The integral molding of several fixed laminations with the base body effectively improves mechanical strength and rigidity, reducing deformation and vibration during operation. In addition, the base body is a complete and uninterrupted annular structure, ensuring the roundness and concentricity of the fixed and movable laminations, effectively reducing electromagnetic noise and torque ripple. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the stator core structure of this utility model; Figure 2 This is a schematic diagram of the structure of the annular base of this utility model; Figure 3 This is a schematic diagram of the structure of the movable punch of this utility model; Figure 4 This is a schematic diagram showing the dimensions of the stator core of this utility model; Figure 5 This is an assembly drawing of the stator core of this utility model; Figure 6 This is a bar chart comparing the cogging torque of this utility model with the prior art; Figure 7 This is a bar chart of the no-load back EMF harmonics comparing the present invention with existing technologies; Figure 8 This is a histogram showing the torque fluctuations of this invention compared to existing technologies.

[0017] In the picture: 100. Main body of the base; 200. Fixed stamping; 300. Active film processing; 400. Stator slot; 500, splicing blocks; 600, splicing groove; 700, stress hole; 210. Fixed teeth; 220. Fixed yoke; 310. Movable teeth; 320. Movable yoke. Detailed Implementation

[0018] Please refer to the attached diagram below. Figures 1 to 8This document explains the content of this utility model and its differences from existing technologies. The technical solutions (including preferred solutions) of this utility model are further described in detail below through accompanying drawings and examples of optional embodiments. It should be noted that any technical feature or solution in this embodiment is one or more of a variety of optional technical features or solutions. For the sake of brevity, this document cannot exhaustively list all alternative technical features and solutions of this utility model, nor is it convenient to emphasize that each implementation of a technical feature is one of multiple optional implementations. Therefore, those skilled in the art should understand that any technical means provided by this utility model can be replaced, or any two or more technical means or features provided by this utility model can be combined to obtain a new technical solution. No technical feature or solution in this embodiment limits the scope of protection of this utility model. The scope of protection of this utility model should include any alternative technical solutions that can be conceived by those skilled in the art without creative effort, as well as new technical solutions obtained by combining any two or more technical means or features provided by this utility model.

[0019] In the description of this invention, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0021] This invention provides a stator core and motor that simplifies the manufacturing process, optimizes the magnetic circuit, reduces noise, and improves mechanical strength and rigidity.

[0022] The following is combined Figures 1 to 8 The technical solution provided by this utility model will be described in more detail.

[0023] This utility model provides a stator core, including an annular base and movable laminations 300. The annular base includes a base body 100 and a plurality of fixed laminations 200 integrally formed with the base body 100. The movable laminations 300 are detachably disposed between two adjacent fixed laminations 200, so that a stator slot 400 is formed between any adjacent fixed laminations 200 and the movable laminations 300.

[0024] The stator core provided by this utility model includes an annular base and movable laminations 300. The annular base includes a base body 100 and a plurality of fixed laminations 200 integrally formed with the base body 100. The movable laminations 300 are detachably disposed between two adjacent fixed laminations 200, so that a stator slot 400 is formed between any adjacent fixed lamination 200 and the movable lamination 300. The movable laminations 300 and the fixed laminations 200 are detachably connected, which can significantly improve the winding utilization rate and solve the problem of low winding utilization rate in the prior art. Simultaneously, the magnetic induction lines can still maintain good continuity at the junction of the movable laminations 300 and the fixed laminations 200. This design significantly reduces cogging torque, torque ripple, and back EMF harmonics, optimizes the magnetic circuit, reduces magnetic reluctance, and improves the electromagnetic performance and efficiency of the motor. By integrally molding several fixed laminations 200 with the base body 100, the number of assembly blocks required can be greatly reduced, simplifying the assembly process, and the reduction in the number of blocks can reduce cumulative errors. The integral molding of several fixed laminations 200 with the base body 100 effectively improves mechanical strength and rigidity, and reduces deformation and vibration during operation. In addition, the base body 100 is a complete and uninterrupted annular structure, ensuring the roundness and concentricity of the fixed laminations 200 and the movable laminations 300, effectively reducing electromagnetic noise and torque ripple.

[0025] It is understood that several fixed laminations 200 and movable laminations 300 together form a complete M stator tooth structure, and stator slots 400 are formed between adjacent fixed laminations 200 and movable laminations 300. Since the movable laminations 300 and fixed laminations 200 are detachably connected, it is convenient to wind wire, improve the winding rate, and achieve ultra-high slot fill factor. It can achieve low resistance of thick wire diameter while increasing the number of turns to meet the back EMF requirement.

[0026] In some embodiments of this utility model, one end of the fixed punch 200 is provided with a splicing block 500 and a splicing groove 600, and one end of the movable punch 300 is provided with a splicing groove 600 and a splicing block 500. The splicing block 500 and the splicing groove 600 cooperate with each other, and adjacent fixed punches 200 and movable punches 300 are detachably connected through the splicing block 500 and the splicing groove 600.

[0027] In some embodiments of the present invention described above, the adjacent fixed punch 200 and the movable punch 300 are detachably connected by the cooperating splicing block 500 and the splicing groove 600, thereby ensuring that the assembly of the fixed punch 200 and the movable punch 300 is more convenient.

[0028] In some embodiments of this utility model, the fixed punch 200 is provided with splicing blocks 500 and splicing grooves 600 at both ends of its circumference, and the movable punch 300 is provided with splicing grooves 600 and splicing blocks 500 at both ends of its circumference. The splicing blocks 500 and the splicing grooves 600 cooperate with each other, and adjacent fixed punches 200 and movable punches 300 are detachably connected through the splicing blocks 500 and the splicing grooves 600.

[0029] Optionally, the splicing block 500 and the splicing slot 600 are matched in shape and size. Matching the shape and size of the splicing block 500 and the splicing slot 600 ensures a high-precision connection during assembly. This high-precision connection helps reduce gaps and misalignments, improving the stability and reliability of the overall structure. The matching shape and size also increases the contact area between the splicing block 500 and the splicing slot 600, thereby increasing the connection strength. This high-strength connection can withstand greater loads and impacts, improving the durability and safety of the structure.

[0030] Specifically, the shapes of the splicing block 500 and the splicing groove 600 can be isosceles trapezoids, arcs, irregular shapes, or other shapes. The shapes of the splicing block 500 and the splicing groove 600 can be selected according to the actual situation.

[0031] Preferably, the splicing block 500 includes a long strip segment and a semi-cylindrical segment, the long strip segment and the semi-cylindrical segment are connected, and the other end of the long strip segment is connected to the fixed punch 200 or the movable punch 300.

[0032] In some embodiments of this utility model, the fixing piece 200 includes a fixing tooth portion 210 and a fixing yoke portion 220. The fixing yoke portion 220 is connected to the radial outer side of the fixing tooth portion 210. The splicing block 500 and the splicing groove 600 are respectively provided at both ends of the circumferential direction of the fixing yoke portion 220.

[0033] In some embodiments of the present invention described above, the fixed punch 200 includes a fixed tooth portion 210 and a fixed yoke portion 220. One circumferential end of the fixed yoke portion 220 is detachably connected to the splicing groove 600 of the movable punch 300 via the splicing block 500, and the other circumferential end of the fixed yoke portion 220 is detachably connected to the splicing block 500 of the movable punch 300 via the splicing groove 600.

[0034] In some embodiments of this utility model, the movable punch 300 includes a movable tooth 310 and a movable yoke 320. The movable yoke 320 is connected to the radial outer side of the movable tooth 310. The splicing block 500 and the splicing groove 600 are respectively provided at both ends of the movable yoke 320 in the circumferential direction.

[0035] In some embodiments of the present invention described above, the movable punch 300 includes a movable tooth 310 and a movable yoke 320. One circumferential end of the movable yoke 320 is detachably connected to the splicing groove 600 of the fixed punch 200 via the splicing block 500, and the other circumferential end of the movable yoke 320 is detachably connected to the splicing block 500 of the fixed punch 200 via the splicing groove 600.

[0036] It is understood that the movable lamination 300 is disposed between two adjacent fixed laminations 200, and the movable tooth 310 and the fixed tooth 210 are arranged alternately on the circumference to form a complete set of M stator teeth. Correspondingly, the number of the movable tooth 310 and the fixed tooth 210 is M.

[0037] In some embodiments of this utility model, the radial thickness of the fixed yoke 220 and the movable yoke 320 is W2, and the total radial thickness of the base body 100 and the fixed yoke 220 is W1, where 0.3W1≤W2≤0.7W1.

[0038] In some of the embodiments of this utility model described above, the radial thickness of the fixed yoke 220 and the movable yoke 320 is set in a reasonable ratio to the total radial thickness of the base body 100 and the fixed yoke 220, which is sufficient to ensure the mechanical strength of the stator core.

[0039] In some embodiments of this utility model, the radial thickness of the splicing block 500 is W3, where 0.35W2≤W3≤0.65W2. The circumferential thickness of the splicing block 500 is H, where 0.2W2≤H<W2; and / or, the splicing block 500 includes a long strip segment and a semi-cylindrical segment, the radius of the semi-cylindrical segment being R1, where 0≤R1<0.38W2.

[0040] In some of the embodiments of this utility model described above, the radial thickness and circumferential thickness of the splicing block 500 are reasonably set, which can ensure the strength of the stator core and the connection effect between the splicing block 500 and the splicing groove 600.

[0041] In some embodiments of this utility model, the fixed tooth portion 210 and the fixed yoke portion 220 have the same structure and size, the fixed yoke portion 220 and the movable yoke portion 320 have the same structure and size; and / or, the fixed punch 200 and the movable punch 300 have a T-shaped structure.

[0042] In some embodiments of this utility model, the fixing plate 200 is provided with stress holes 700.

[0043] In some of the embodiments of this utility model described above, stress holes 700 are provided to absorb the stress of the heat fitting, thereby reducing the degree of deformation of the stator core. At the same time, the deformed part of the stator can be guided to deform at the stress holes 700, thereby achieving uniform deformation of the stator core and reducing the increase in iron loss caused by the deformation of the stator core.

[0044] Furthermore, multiple stress holes 700 are provided, symmetrically arranged about the centerline of the stator core. This symmetrical distribution of stress holes 700 ensures uniform stress distribution on the stator core in all directions, maintaining structural stability and balance. Simultaneously, the symmetrical distribution of stress holes 700 ensures more uniform deformation of the stator core during heat-fitting, thereby reducing the increase in iron loss caused by uneven deformation of the stator core and ultimately improving the motor's operating efficiency.

[0045] In some embodiments of this utility model, the base body 100 has a ring-shaped structure.

[0046] This utility model also provides an electric motor, including the stator core as described above.

[0047] The motor provided by this utility model includes the stator core as described above, and also has the beneficial technical effects of improving mechanical strength and rigidity, reducing deformation and vibration during operation, and effectively reducing electromagnetic noise and torque fluctuation.

[0048] Example 1: The stator core provided by this utility model includes an annular base and movable laminations 300. The annular base includes a base body 100 and six fixed laminations 200 integrally formed with the base body 100. The fixed laminations 200 are provided with stress holes 700. There are six movable laminations 300. The movable laminations 300 are detachably disposed between two adjacent fixed laminations 200 so that a stator slot 400 is formed between any two adjacent fixed laminations 200 and the movable laminations 300.

[0049] In this embodiment, each of the fixed punches 200 has a splicing block 500 and a splicing groove 600 at both ends of its circumference, and each of the movable punches 300 has a splicing groove 600 and a splicing block 500 at both ends of its circumference. The splicing block 500 and the splicing groove 600 cooperate with each other, and adjacent fixed punches 200 and movable punches 300 are detachably connected through the splicing block 500 and the splicing groove 600.

[0050] The stator core provided by this utility model features a detachable connection between movable laminations 300 and fixed laminations 200, which significantly improves winding utilization and solves the problem of low winding utilization in existing technologies. Simultaneously, the magnetic induction lines maintain good continuity at the junction of the movable laminations 300 and fixed laminations 200, significantly reducing cogging torque, torque fluctuation, and back EMF harmonics, optimizing the magnetic circuit, reducing magnetic resistance, and improving the electromagnetic performance and efficiency of the motor. By integrally molding several fixed laminations 200 with the base body 100, the number of assembly blocks required is reduced by half, simplifying the assembly process, and the reduced number of blocks also reduces cumulative errors. The integral molding of several fixed laminations 200 with the base body 100 effectively improves mechanical strength and rigidity, reducing deformation and vibration during operation. Furthermore, the base body 100 is a complete, uninterrupted annular structure, ensuring the roundness and concentricity of the fixed laminations 200 and the movable laminations 300, effectively reducing electromagnetic noise and torque fluctuation.

[0051] Specifically, the fixing piece 200 includes a fixing tooth portion 210 and a fixing yoke portion 220. The fixing yoke portion 220 is connected to the radial outer side of the fixing tooth portion 210. The splicing block 500 and the splicing groove 600 are respectively provided at both ends of the fixing yoke portion 220 in the circumferential direction.

[0052] The movable punch 300 includes a movable tooth 310 and a movable yoke 320. The movable yoke 320 is connected to the radial outer side of the movable tooth 310. The splicing block 500 and the splicing groove 600 are respectively provided at both ends of the movable yoke 320 in the circumferential direction.

[0053] More specifically, the two ends of the fixed yoke 220 in the circumferential direction are a fixed left end and a fixed right end, respectively. The fixed left end is provided with a splicing block 500, and the fixed right end is provided with a splicing groove 600. Correspondingly, the two ends of the movable yoke 320 in the circumferential direction are a movable left end and a movable right end, respectively. The movable left end is provided with a splicing groove 600, and the movable right end is a splicing block 500. The adjacent movable left end and the fixed right end are connected.

[0054] Further, the radial thickness of the fixed yoke 220 and the movable yoke 320 is W2, and the total radial thickness of the base body 100 and the fixed yoke 220 is W1, where 0.3W1≤W2≤0.7W1. The radial thickness of the splicing block 500 is W3, where 0.35W2≤W3≤0.65W2. The circumferential thickness of the splicing block 500 is H, where 0.2W2≤H<W2; and / or, the splicing block 500 includes a long strip segment and a semi-cylindrical segment, the radius of the semi-cylindrical segment being R1, where 0≤R1<0.38W2.

[0055] This utility model also provides an electric motor, including the stator core as described above.

[0056] In the description of this specification, references to terms such as "example," "embodiment," or "some embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0057] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A stator core, characterized in that, It includes an annular base and a movable stamping. The annular base includes a base body and a plurality of fixed stampings integrally formed with the base body. The movable stampings are detachably disposed between two adjacent fixed stampings so that a stator groove is formed between any adjacent fixed stampings and the movable stampings.

2. The stator core according to claim 1, characterized in that, One end of the fixed punch is provided with a splicing block and a splicing groove, and the other end of the movable punch is provided with a splicing groove and a splicing block. The splicing block and the splicing groove cooperate with each other, and adjacent fixed punches and movable punches are detachably connected through the splicing block and the splicing groove.

3. The stator core according to claim 2, characterized in that, The fixing piece includes a fixing tooth and a fixing yoke. The fixing yoke is connected to the radial outer side of the fixing tooth. The splicing block and the splicing groove are respectively provided at both ends of the fixing yoke in the circumferential direction.

4. The stator core according to claim 3, characterized in that, The movable lamination includes a movable tooth and a movable yoke. The movable yoke is connected to the radial outer side of the movable tooth, and the splicing block and the splicing groove are respectively provided at both ends of the movable yoke in the circumferential direction.

5. The stator core according to claim 4, characterized in that, The radial thickness of the fixed yoke and the movable yoke is W2, and the total radial thickness of the base body and the fixed yoke is W1, where 0.3W1≤W2≤0.7W1.

6. The stator core according to claim 5, characterized in that, The radial thickness of the splicing block is W3, where 0.35W2≤W3≤0.65W2.

7. The stator core according to claim 5, characterized in that, The circumferential thickness of the splicing block is H, 0.2W2≤H<W2; and / or, the splicing block includes a long strip segment and a semi-cylindrical segment, the radius of the semi-cylindrical segment being R1, 0≤R1<0.38W2.

8. The stator core according to claim 4, characterized in that, The fixed tooth and the fixed yoke have the same structure and size; the fixed yoke and the movable yoke have the same structure and size; and / or, the fixed punch and the movable punch are T-shaped structures.

9. The stator core according to claim 1, characterized in that, The fixing piece is provided with stress holes.

10. An electric motor, characterized in that, Includes the stator core as described in any one of claims 1-9.

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