Stator iron core compounded by anisotropic materials

Abstract

The anisotropic material composite stator core comprises a first main body, the first main body comprises a first lamination, at least one layer of second lamination is laminated at each of the upper end and the lower end of the first lamination, or at least one layer of second lamination is laminated at one of the upper end and the lower end of the first lamination, the first lamination is made of a non-ferromagnetic material, and the second lamination is made of a non-ferromagnetic material. The second laminations are made of soft magnetic materials, and the multiple first main bodies are arranged in a stacked mode. The first laminations made of the non-ferromagnetic material are arranged between the second laminations made of the soft magnetic material, so that the magnetic loss and hysteresis can be further reduced, and the energy conversion efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a stator core composited with heterogeneous materials. Background Art

[0002] As competition in new energy vehicles intensifies, the requirements for automotive drive motors are becoming increasingly stringent, with requirements for high efficiency, high power, and high speed. Consequently, electrical steel sheets are becoming thinner and stronger. To achieve the ultimate in performance, the thickness of electrical steel sheets has gradually increased from 0.5mm to 0.35mm, 0.27mm, 0.2mm, 0.15mm, and even 0.10mm. The stator core within the motor is typically constructed by directly stacking thinner and thinner electrical steel sheets. While this significantly reduces the electromagnetic performance of the stator core, especially magnetic losses, further improvement is still needed. Utility Model Content

[0003] The purpose of this application is to provide a stator core composed of heterogeneous materials to further improve its electromagnetic performance.

[0004] In order to achieve the above-mentioned purpose, the utility model is designed to design a stator core composed of heterogeneous materials, including a first main body, the first main body including a first lamination, at least one layer of a second lamination is stacked at both upper and lower ends of the first lamination, or at least one layer of a second lamination is stacked at one of the upper and lower ends of the first lamination, the first lamination is a non-ferromagnetic material, the second lamination is a soft magnetic material, and multiple first bodies are stacked.

[0005] Furthermore, it further includes a second body, the second body includes at least one third laminate, and the second body is stacked between adjacent first bodies.

[0006] Furthermore, the third laminate is integrally formed, and the third laminate is made of silicon steel material or amorphous material.

[0007] Furthermore, the third laminate includes a plurality of assembling blocks, the assembling blocks are connected end to end and assembled into a ring, and the assembling blocks are made of amorphous material.

[0008] Furthermore, assembling seams are formed between adjacent assembling blocks. When there are multiple third laminates, the multiple third laminates are stacked, and the assembling seams between the third laminates in adjacent layers are staggered.

[0009] Furthermore, the second body and the first body are bonded and compounded by a self-adhesive coating.

[0010] Furthermore, the first bodies are bonded and compounded by a self-adhesive coating.

[0011] Furthermore, the first laminate and the second laminate are connected by coating or welding or bonding by self-adhesive coating.

[0012] Furthermore, the thickness of the second laminate is less than or equal to 0.2 mm.

[0013] Furthermore, the thickness of the first laminate is less than or equal to 0.1 mm.

[0014] Compared with the prior art, the present invention has the beneficial effect that the first laminations made of non-ferromagnetic material are arranged between the second laminations made of soft magnetic material, which can further reduce magnetic loss and hysteresis and improve energy conversion efficiency.

[0015] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of a stator core in one embodiment of the present application.

[0017] Figure 2 This is another structural schematic diagram of the stator core in one embodiment of the present application.

[0018] Figure 3 This is another structural schematic diagram of the stator core in one embodiment of the present application.

[0019] Figure 4 This is another structural schematic diagram of the stator core in one embodiment of the present application.

[0020] Figure 5 This is another structural schematic diagram of the stator core in one embodiment of the present application.

[0021] Figure 6 This is another structural schematic diagram of the stator core in one embodiment of the present application.

[0022] Figure 7 This is another structural schematic diagram of the stator core in one embodiment of the present application.

[0023] Figure 8 This is another structural schematic diagram of the stator core in one embodiment of the present application.

[0024] Figure 9 This is another structural schematic diagram of the stator core in one embodiment of the present application.

[0025] Figure 10 This is another structural schematic diagram of the stator core in one embodiment of the present application.

[0026] Figure 11It is a schematic structural diagram of the second laminate, the first laminate and the third laminate in one embodiment of the present application.

[0027] Figure 12 This is another structural schematic diagram of the third laminate in an embodiment of the present application.

[0028] Figure 13 It is a structural diagram of the assembly blocks in this application. DETAILED DESCRIPTION

[0029] Exemplary embodiments are described in detail herein, with examples illustrated in the accompanying drawings. When the following description refers to the drawings, identical numerals in different figures represent identical or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of devices, systems, apparatus, and methods consistent with certain aspects of the present application.

[0030] Please refer to Figures 1 to 4 As shown in Figure 11, a stator core made of a composite of heterogeneous materials includes a first main body 10, the first main body 10 includes a first lamination 11, at least one layer of second lamination 12 is stacked on both the upper and lower ends of the first lamination 11, or at least one layer of second lamination 12 is stacked on one end of the upper and lower ends of the first lamination 11, the first lamination 11 is a non-ferromagnetic material, the second lamination 12 is a soft magnetic material, and multiple first main bodies 10 are stacked.

[0031] In one embodiment, at least one layer of the second laminate 12 is provided at both the upper and lower ends of the first laminate 11. Of course, the second laminate 12 can be multiple layers, and the number of layers of the second laminate 12 at the upper and lower ends of the first laminate 11 can be the same or different. In another embodiment, one of the upper and lower ends of the first laminate 11 is stacked with at least one layer of the second laminate 12. Of course, the second laminate 12 can also be multiple layers. At this time, when multiple first bodies 10 are stacked and compounded, the first laminate 11 will be compounded with the first laminate 11.

[0032] Of course, the first laminate 11 in the first body 10 may also be multiple layers, but preferably the first laminate 11 is one layer.

[0033] Among them, non-ferromagnetic materials can be selected from copper materials, aluminum materials, austenitic stainless steel, graphite, graphene, etc.

[0034] The thickness of the first lamination 11 is less than or equal to 0.1 mm, and the thickness of the second lamination 12 is less than or equal to 0.2 mm. The thickness of the stator core is generally controlled to be 0.2 mm to 6 mm. After the first body 10 is stacked, the upper and lower ends of the stator core are both second laminations 12. At this time, in order to ensure the strength of the stator core, the second lamination 12 is preferably made of silicon steel.

[0035] A first lamination 11 made of non-ferromagnetic material is added to the stator core. Compared with a stator core composed entirely of second laminations 12 made of soft magnetic material, the stator core has further improved electromagnetic performance, further reduced magnetic loss and hysteresis, and higher energy conversion efficiency, which is relatively improved by about 30%. At the same time, based on the characteristics of the non-ferromagnetic material, certain performance aspects of the stator core can be improved. For example, when the non-ferromagnetic material is copper, aluminum, etc., the thermal conductivity of the stator core can be improved, the heat dissipation of the stator core can be improved, and the heat dissipation of the motor can be further improved.

[0036] The first laminate 11 and the second laminate 12 can be composited by coating, such as directly composited during cold rolling or hot rolling, or welded together, such as by diffusion welding or electric welding. In both cases, the second laminate 12 is preferably made of silicon steel. The two can also be bonded together by a self-adhesive coating.

[0037] The plurality of first bodies 10 are bonded and composited together by a self-adhesive coating. The bonding and composite process is the same as that in the prior art and will not be described in detail here.

[0038] In another embodiment, please refer to Figures 5 to 10 As shown in Figures 11 to 13, a second body 20 is stacked between adjacent first bodies 10. The second body 20 includes at least one third laminate 21. The thickness of the third laminate 21 is preferably less than or equal to 0.2 mm.

[0039] Among them, when the volume of the third laminate 21 is small, the third laminate 21 is formed in one piece. At this time, the third laminate 21 is preferably made of silicon steel material or amorphous material. Of course, when multiple layers of third laminates 21 are stacked, one layer of third laminate 21 can be made of silicon steel material, and another layer of third laminate 21 can be made of amorphous material.

[0040] When the volume of the third laminate 21 is large, the third laminate 21 can also be made of silicon steel or amorphous material. When amorphous material is used, the third laminate 21 can be assembled in parts. Specifically, the third laminate 21 includes a plurality of assembling blocks 211. The assembling blocks 211 are fan-shaped, and the assembling blocks 211 are connected end to end to form a ring.

[0041] A method of assembling the splicing blocks 211: Please refer to Figure 12 、 13 As shown, one end of the assembling block 211 is provided with a splicing block 212 and the other end is provided with a splicing groove 213. The splicing groove 213 is adapted to the splicing block 212. When adjacent splicing blocks 211 are assembled, the splicing blocks 212 are inserted into the adjacent splicing grooves 213 to realize the assembly of adjacent splicing blocks 211.

[0042] Of course, the connection method between the splicing blocks 211 is not limited to the above one, such as welding, plugging, etc.

[0043] Adjacent assembly blocks 211 form assembly seams 214. When multiple third laminations 21 are provided, the plurality of third laminations 21 are stacked, and the assembly seams 214 between adjacent layers of third laminations 21 are staggered. This allows the assembly seams 214 to be supported by the adjacent layers of third laminations 21, thereby improving the stator core strength. Preferably, the assembly seam 214 of one layer is located midway between a pair of assembly seams 214 in adjacent layers. In this case, the assembly seam 214 is optimally balanced in terms of support from the adjacent layers of third laminations 21.

[0044] The second body 20 is bonded to the first body 10 via a self-adhesive coating. The bonding and bonding process is the same as in the prior art and will not be described in detail here.

[0045] The thicknesses of the second body 20 , the first body 10 , the first laminate 11 , the third laminate 21 and the second laminate 12 in the drawings are for illustration only and do not represent actual thicknesses.

[0046] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A stator core made of composite materials of different properties, characterized in that: It includes a first main body, which includes a first laminate, at least one second laminate is stacked at both upper and lower ends of the first laminate, or at least one second laminate is stacked at one of the upper and lower ends of the first laminate, the first laminate is made of non-ferromagnetic material, the second laminate is made of soft magnetic material, and multiple first bodies are stacked.

2. The stator core made of heterogeneous materials according to claim 1, characterized in that: The system further includes a second body, wherein the second body includes at least one third laminate, and the second body is stacked between adjacent first bodies.

3. The stator core made of heterogeneous materials according to claim 2, characterized in that: The third laminate is integrally formed and is made of silicon steel or amorphous material.

4. The stator core made of heterogeneous materials according to claim 2, characterized in that: The third laminate includes a plurality of assembling blocks, which are connected end to end and assembled into a ring, and the assembling blocks are made of amorphous material.

5. The stator core made of heterogeneous materials according to claim 4, characterized in that: An assembling seam is formed between adjacent assembling blocks. When there are multiple third laminates, the multiple third laminates are stacked, and the assembling seams between the third laminates in adjacent layers are staggered.

6. The stator core made of heterogeneous materials according to claim 2, characterized in that: The second body is bonded and compounded with the first body through a self-adhesive coating.

7. The stator core made of heterogeneous materials according to claim 1, characterized in that: The first bodies are bonded and compounded by a self-adhesive coating.

8. The stator core made of heterogeneous materials according to claim 1, characterized in that: The first laminate and the second laminate are connected by cladding or welding or by bonding by self-adhesive coating.

9. The stator core made of heterogeneous materials according to claim 1, characterized in that: The thickness of the second laminate is less than or equal to 0.2 mm.

10. The stator core made of heterogeneous materials according to claim 1, characterized in that: The thickness of the first laminate is less than or equal to 0.1 mm.

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