Stator lamination, stator core and electric machine

Abstract

The application discloses a stator lamination, a stator core and a motor, and belongs to the technical field of motors. The stator lamination comprises a lamination body and a plurality of sub-lamination groups, and each sub-lamination group comprises a plurality of partitioned laminations. Since the stator lamination can be divided into the lamination body and the plurality of partitioned laminations, the area of each partitioned lamination after being divided is relatively small. Therefore, in the production process of the stator lamination, only the partitioned laminations with small areas need to be manufactured, and the partitioned laminations with small areas are tightly connected with the lamination body through splicing technology. In this way, more partitioned laminations can be cut out on the same raw material by flexible layout, and the generation of waste materials is effectively reduced, so that the utilization rate of materials can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric machines, in particular to a stator lamination, a stator core and an electric machine. BACKGROUND

[0002] The core components of an electric machine include a stator and a rotor, which are the key to the conversion of electric energy and mechanical energy. The stator generally includes a set of stator windings and a stator core, and its core function is to generate a magnetic field and interact with the magnetic field generated by the rotor to complete the conversion of energy forms.

[0003] Generally, the stator core is formed by stacking a plurality of stator laminations, and each stator lamination is processed from a silicon steel coil. The current production process of stator laminations generally uses stamping technology to directly punch out stator laminations of corresponding shapes and sizes from a continuous silicon steel coil.

[0004] However, the direct punching method from a continuous silicon steel coil results in low utilization of the silicon steel coil, thereby increasing the cost of preparing stator laminations. SUMMARY

[0005] The embodiments of the present application provide a stator lamination, a stator core and an electric machine. The problem of low utilization of raw materials in the prior art can be solved, and the technical solution is as follows:

[0006] In one aspect, a stator lamination is provided, comprising:

[0007] a lamination body and a plurality of sub-lamination groups;

[0008] Each of the sub-lamination groups includes a plurality of partition laminations, each of the partition laminations has a plurality of heat dissipation holes; the distribution of the heat dissipation holes of each of the partition laminations in the same sub-lamination group is the same; the distribution of the heat dissipation holes of the partition laminations in one of the sub-lamination groups is different from the distribution of the heat dissipation holes of the partition laminations in another of the sub-lamination groups;

[0009] The plurality of partition laminations in any one of the sub-lamination groups can be distributed circumferentially around the periphery of the lamination body, and the plurality of partition laminations in any one of the sub-lamination groups can be connected to the lamination body by splicing.

[0010] Optionally, the outer edge of the lamination body has a plurality of first clamping portions;

[0011] The side of the partition lamination facing the lamination body has a second clamping portion;

[0012] The plurality of first clamping portions correspond one-to-one to the plurality of partitioned stamping sheets in any one of the sub-stamping sheet groups, and each first clamping portion is clamped with a second clamping portion in the corresponding partitioned stamping sheet.

[0013] Optionally, one of the first clamping portion and the second clamping portion is a clamping protrusion, and the other is a clamping groove.

[0014] After the stamping sheet body and the partitioned stamping sheet are spliced, at least part of the clamping protrusion is located in the clamping groove.

[0015] Optionally, in the case where the first clamping portion is the clamping protrusion and the second clamping portion is the clamping groove, the stamping sheet body further has a bearing clamping slot located between two adjacent clamping protrusions in the peripheral direction of the stamping sheet body.

[0016] Each partitioned stamping sheet comprises a heat dissipation portion, and a first connecting portion and a second connecting portion fixedly connected with the heat dissipation portion, the heat dissipation portion has the plurality of heat dissipation holes, and the first connecting portion and the second connecting portion have the clamping groove therebetween.

[0017] Any one of the bearing clamping slots in the stamping sheet body is used to bear the first connecting portion in a first partitioned stamping sheet and the second connecting portion in a second partitioned stamping sheet, and the first partitioned stamping sheet and the second partitioned stamping sheet are two partitioned stamping sheets adjacently arranged in the peripheral direction of the stamping sheet body in the same sub-stamping sheet group.

[0018] Optionally, the extension length of the clamping protrusion in the peripheral direction of the stamping sheet body gradually increases in the direction from the stamping sheet body to the partitioned stamping sheet.

[0019] Optionally, the side of the clamping protrusion away from the stamping sheet body has a first welding hole, and the partitioned stamping sheet has a second welding hole in communication with the clamping groove.

[0020] After at least part of the clamping protrusion is located in the clamping groove, the first welding hole and the second welding hole are in communication, and the first welding hole and the second welding hole in communication are used to bear first solder to enable the stamping sheet body to be fixedly connected with the corresponding partitioned stamping sheet.

[0021] Optionally, both ends of the heat dissipation portion in the partitioned stamping sheet further have a third welding hole and a fourth welding hole, respectively.

[0022] Wherein, after the first sub-punching sheet and the second sub-punching sheet are connected to the punching sheet body by splicing, the third welding hole in the first sub-punching sheet and the fourth welding hole in the second sub-punching sheet are in communication, and the third welding hole and the fourth welding hole in communication are used to carry the second solder, so that the first sub-punching sheet can be fixedly connected with the second sub-punching sheet.

[0023] Optionally, the punching sheet body is annular, and an inner edge of the punching sheet body has a plurality of protrusions, and the protrusions are used to wind coils.

[0024] In another aspect, a stator core is provided, comprising: a plurality of stator punching sheets stacked, each of the stator punching sheets being any one of the stator punching sheets described above.

[0025] In yet another aspect, an electric machine is provided, comprising: the stator core described above, and a rotor rotationally connected to the stator core.

[0026] The technical scheme provided by the embodiments of the present application has at least the following beneficial effects:

[0027] The stator lamination includes a lamination body and a plurality of sub-lamination groups, each of which includes a plurality of partitioned laminations. Since the stator lamination can be divided into the lamination body and the plurality of partitioned laminations, the area of each of the partitioned laminations after being divided is small. Therefore, in the production process of the stator lamination, only the partitioned laminations with small areas need to be manufactured, and the partitioned laminations with small areas are tightly connected with the lamination body through splicing technology. In this way, more partitioned laminations can be cut out on the same raw material by flexible layout, thereby effectively reducing the generation of waste materials, and thus the utilization rate of materials can be improved. In addition, since the distribution positions and distribution quantities of the heat dissipation holes of the partitioned laminations in the same sub-lamination group are consistent, and at least one of the distribution positions and distribution quantities of the heat dissipation holes of one partitioned lamination is different from at least one of the distribution positions and distribution quantities of the heat dissipation holes of another partitioned lamination which belongs to two different sub-lamination groups. Therefore, after the partitioned laminations in any sub-lamination group are connected with the lamination body through splicing, a stator lamination with specific heat dissipation holes can be obtained. After the same type of stator laminations are stacked to obtain a stator core, the heat dissipation holes at the same position in each stator lamination are connected, that is, the stator core can be ensured to have specific heat dissipation channels. Therefore, the lamination body in the stator lamination can be ensured to remain unchanged as the main frame of the stator lamination, and any sub-lamination group can function as a replaceable independent heat dissipation module. In the face of specific heat dissipation requirements of different motors, only the sub-lamination group with specific heat dissipation holes needs to be selected or customized for replacement, without the need for overall modification or replacement of the entire stator lamination, thereby reducing costs and improving production and maintenance flexibility. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0029] Figure 1 is a schematic diagram of a whole structure of a stator lamination provided by an embodiment of the present application;

[0030] Figure 2 is a schematic diagram of a structure of a sub-lamination group provided by an embodiment of the present application;

[0031] Figure 3 is a schematic diagram of a structure of a partitioned lamination provided by an embodiment of the present application;

[0032] Figure 4 is a schematic diagram of a structure of a lamination body provided by an embodiment of the present application;

[0033] Figure 5 is another partitioned lamination structure schematic diagram provided by an embodiment of the present application;

[0034] Figure 6 is another lamination body structure schematic diagram provided by an embodiment of the present application;

[0035] Figure 7 is another partitioned lamination structure schematic diagram provided by an embodiment of the present application;

[0036] Figure 8 is another stator lamination overall structure schematic diagram provided by an embodiment of the present application;

[0037] Figure 9 is Figure 6 is a partial enlarged view of the lamination body at A shown;

[0038] Figure 10 is Figure 4 is a partial enlarged view of the lamination body at B shown;

[0039] Figure 11 is Figure 5 is a partial enlarged view of the partitioned lamination at D shown. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical scheme and advantages of the present application more clear, the embodiments of the present application will be further described in detail below with reference to the drawings.

[0041] Please refer to Figure 1 , Figure 1 is a stator lamination overall structure schematic diagram provided by an embodiment of the present application. The stator lamination 000 can include: a lamination body 100 and a plurality of sub-lamination groups 200.

[0042] Please refer to Figure 2 and Figure 3 , Figure 2 is a sub-lamination group structure schematic diagram provided by an embodiment of the present application, Figure 3 is a partitioned lamination structure schematic diagram provided by an embodiment of the present application. Each sub-lamination group 200 can include: a plurality of partitioned laminations 201, and each partitioned lamination 201 in each sub-lamination group 200 has a plurality of heat dissipation holes L.

[0043] The plurality of partitioned laminations 201 in any one sub-lamination group 200 can be distributed circumferentially around the periphery of the lamination body 100 in the stator lamination 000, and the plurality of partitioned laminations 201 in any one sub-lamination group 200 can be connected to the lamination body 100 in the stator lamination 000 by splicing. Here, after the lamination body 100 and the plurality of partitioned laminations 201 in any one sub-lamination group 200 are connected by splicing, the stator lamination 000 can be obtained.

[0044] For example, the heat dissipation holes L can be oil holes for conveying cooling oil. In a possible case, the motor integrated with the stator lamination 000 generates a large amount of heat during operation, which can cause the performance of the motor to decrease. By providing the heat dissipation holes L on each partitioned lamination 201 in the stator lamination 000, it can be ensured that the cooling oil can flow freely and pass through the heat dissipation holes L, so that the cooling oil can directly contact the high-temperature areas of the partitioned laminations 201 and carry away heat, thereby reducing the working temperature of the stator lamination 000 and ensuring the safety of the motor operation.

[0045] In the present application, the distribution of the heat dissipation holes L of each partitioned lamination 201 is the same within the same sub-lamination group 200, and the distribution of the heat dissipation holes L of the partitioned laminations 201 in any two different sub-lamination groups 200 is different.

[0046] Therefore, the distribution position and the number of the heat dissipation holes L of each partitioned lamination 201 in the same sub-lamination group 200 are consistent, and at least one of the distribution position and the number of the heat dissipation holes L of one partitioned lamination 201 is different from at least one of the distribution position and the number of the heat dissipation holes L of another partitioned lamination 201 belonging to two different sub-lamination groups 200.

[0047] In this case, after each partitioned lamination 201 in any one sub-lamination group 200 is connected to the lamination body 100 by splicing, a stator lamination 000 with specific heat dissipation holes L can be obtained. After the same type of stator laminations 000 are stacked to obtain a stator core, the heat dissipation holes L at the same position in each stator lamination 000 are connected, so that the stator core has specific heat dissipation channels.

[0048] In addition, the lamination body 100 in the stator lamination 000 can remain unchanged as the main frame of the stator lamination 000, and any one sub-lamination group 200 can function as a replaceable independent heat dissipation module. That is, in the face of specific heat dissipation needs of different motors, only the sub-lamination group 200 with specific heat dissipation holes L needs to be selected or customized for replacement, without the need for overall modification or replacement of the entire stator lamination 000, thereby reducing costs and improving production and maintenance flexibility.

[0049] In this application, the lamination body 100 as the main frame of the stator lamination 000 can generally be punched as a whole. This punching technology makes the manufactured lamination body 100 a continuous and uninterrupted whole structure. Compared with the way of assembling after block punching of the lamination body 100, such design reduces the welding points or splicing points of the lamination body 100, reduces the stress increase caused by weak connection, and thus can make the overall strength and integrity of the lamination body 100 better. Subsequently, although the multiple sub-laminate 201 can form the stator lamination 000 by splicing with the lamination body 100, since the multiple sub-laminate 201 is only an auxiliary functional sub-area with heat dissipation holes L, splicing the lamination body 100 with each sub-laminate 201 will not have too much impact on the overall strength of the stator lamination 000, thereby making the strength and stability of the stator lamination 000 better.

[0050] In the embodiment of the present application, the stator lamination 000 can be divided into the lamination body 100 and the multiple sub-laminate 201. The area of each sub-laminate 201 after division is relatively small. In the production process of the stator lamination 000, only these small-area sub-laminate 201 needs to be manufactured, and these small-area sub-laminate 201 is tightly connected with the lamination body 100 through splicing technology. In this way, more sub-laminate 201 can be cut out on the same raw material by flexible layout, thereby effectively reducing the generation of waste and improving the utilization rate of materials. For example, computer software aided design such as CAD software can be used for optimized layout to realize more flexible layout and improve material utilization. In addition, when the sub-laminate 201 in the stator lamination 000 is damaged, only the sub-laminate 201 needs to be replaced, without the need to replace the entire stator lamination 000, thereby avoiding the waste of the entire stator lamination 000, and reducing maintenance costs and time.

[0051] In summary, this application proposes a stator lamination, comprising: a lamination body and multiple sub-lamination groups, each sub-lamination group including multiple partitioned laminations. Since the stator lamination can be divided into the lamination body and multiple partitioned laminations, the area of ​​each partitioned lamination is relatively small. Therefore, in the production process of the stator lamination, only these smaller partitioned laminations need to be manufactured, and these smaller partitioned laminations are tightly connected to the lamination body using splicing technology. This allows for flexible layout on the same sheet of raw material to cut more partitioned laminations, effectively reducing waste and improving material utilization. Furthermore, since the distribution position and number of heat dissipation holes in each partitioned lamination within the same sub-lamination group are consistent, while for two partitioned laminations belonging to two different sub-lamination groups, at least one of the distribution position and number of heat dissipation holes in one partitioned lamination differs from at least one of the distribution position and number of heat dissipation holes in the other partitioned lamination. Therefore, by connecting the laminations in each section of any sub-laminate group to the lamination body through splicing, a stator lamination with specific heat dissipation holes can be obtained. Subsequently, by stacking stator laminations of the same type to form a stator core, the heat dissipation holes at the same location in each stator lamination are interconnected, ensuring that the stator core has a specific heat dissipation channel. This ensures that the lamination body, as the main frame of the stator lamination, remains unchanged, while any sub-laminate group can function as a replaceable, independent heat dissipation module. When facing the specific heat dissipation requirements of different motors, only sub-laminate groups with specific heat dissipation holes need to be selected or customized for replacement, without requiring a complete modification or replacement of the entire stator lamination system. This reduces costs and improves production and maintenance flexibility.

[0052] In the embodiments of this application, please refer to Figure 4 and Figure 5 , Figure 4 This is a schematic diagram of a lamination body structure provided in an embodiment of this application. Figure 5 This is a schematic diagram of another partitioned lamination structure provided in the embodiments of this application. The outer edge of the lamination body 100 in the stator lamination 000 has a plurality of first snap-fit ​​portions 101, and each partitioned lamination 201 in any sub-lamination group 200 has a second snap-fit ​​portion 2011 on the side facing the lamination body 100.

[0053] In this case, a plurality of first snap-fit ​​portions 101 on the outer edge of the lamination body 100 in the stator lamination 000 correspond one-to-one with a plurality of partition laminations 201 in any sub-lamination group 200, and each first snap-fit ​​portion 101 on the outer edge of the stator lamination body 100 is snapped with a second snap-fit ​​portion 2011 in the corresponding partition lamination 201.

[0054] In this configuration, each of the first engaging portions 101 on the outer edge of the lamination body 100 can engage with the second engaging portion 2011 in the corresponding partition lamination 201. This allows the lamination body 100 in the stator lamination 000 to be engaged with each partition lamination 201 in any sub-lamination group 200 via the first engaging portions 101 and the second engaging portions 2011, ensuring a more secure connection between the lamination body 100 and each partition lamination 201 in any sub-lamination group 200. Furthermore, the mutual engagement of the first engaging portions 101 and the second engaging portions 2011 prevents the stator lamination 000 from shifting or loosening due to electromagnetic force, mechanical vibration, or other factors during motor operation, thus ensuring the long-term reliability of the motor.

[0055] For example, one of the first snap-fit ​​portion 101 in the stamp body 100 and the second snap-fit ​​portion 2011 in each partition stamp 201 is a snap-fit ​​protrusion P and the other is a snap-fit ​​groove Q.

[0056] In the stator lamination 000, after the lamination body 100 is spliced ​​with each partition lamination 201, at least a portion of the snap-fit ​​protrusion P is located in the snap-fit ​​groove Q.

[0057] For example, after the lamination body 100 in the stator lamination 000 is spliced ​​with each partition lamination 201, all the snap-fit ​​protrusions P are located within the snap-fit ​​grooves Q. In this way, it can be ensured that the lamination body 100 and each partition lamination 201 can be tightly spliced, so as to ensure that the stator lamination 000 composed of the lamination body 100 and multiple partition laminations 201 has high stability and robustness.

[0058] In this application, the first latching portion 101 and the second latching portion 2011 can be flexibly designed as complementary concave and convex shapes, that is, the first latching portion 101 and the second latching portion 2011 can be interchanged as latching protrusions P or latching grooves Q; if the first latching portion 101 is designed as a latching protrusion P, then the second latching portion 2011 matches as a latching groove Q; conversely, if the first latching portion 101 is designed as a latching groove Q, then the second latching portion 2011 is adapted to be a latching protrusion P. For clarity, this application will use the example of the first latching portion 101 being a latching protrusion P and the second latching portion 2011 being a latching groove Q for illustrative purposes.

[0059] In the embodiments of this application, please refer to Figure 6 , Figure 6This is a schematic diagram of another lamination body structure provided in an embodiment of this application. In the case where the first engaging portion 101 on the lamination body 100 is a engaging protrusion P, and the second engaging portions 2011 on the side of each partition lamination 201 facing the lamination body 100 are engaging grooves Q, the lamination body 100 in the stator lamination 000 also has a bearing groove C located in the circumferential direction of the lamination body 100 between two adjacent engaging protrusions P. That is, the bearing groove C and the engaging protrusions P are distributed alternately in the circumferential direction of the lamination body 100.

[0060] Please refer to the following in this application: Figure 7 , Figure 7 This is a schematic diagram of another partitioned lamination structure provided in the embodiments of this application. Each partitioned lamination 201 in any sub-lamination group 200 may include: a heat dissipation part 2012, and a first connecting part 2013 and a second connecting part 2014 fixedly connected to the heat dissipation part 2012. The heat dissipation part 2012 in each partitioned lamination 201 has a plurality of heat dissipation holes L, and the first connecting part 2013 and the second connecting part 2014 in each partitioned lamination 201 have a snap-fit ​​groove Q.

[0061] Please refer to the following in this application: Figure 8 , Figure 8 This is a schematic diagram of another stator lamination overall structure provided in this application embodiment. Any one of the bearing slots C in the lamination body 100 is used to bear the first connecting portion 2013 in the first partition lamination 201a and the second connecting portion 2014 in the second partition lamination 201b. For example, the first partition lamination 201a and the second partition lamination 201b are two partition laminations 201 arranged adjacent to each other in the circumferential direction of the lamination body 100 within the same sub-lamination group 200.

[0062] In this configuration, after the stator lamination body 100 of the stator lamination 000 is joined with each of the partition laminations 201, the stator lamination body 100 and each partition lamination 201 can be connected not only by the snap-fit ​​protrusion P and snap-fit ​​groove Q, but also by the bearing slot C in the lamination body 100 and the corresponding first connecting part 2013 and second connecting part 2014. Thus, this dual connection mechanism makes the connection between the stator lamination body 100 and each partition lamination 201 in the stator lamination 000 more robust and stable.

[0063] In this case, after the lamination body 100 in the stator lamination 000 is spliced ​​with each partition lamination 201, even if the connected lamination body 100 and each partition lamination 201 are in a high-speed vibration environment, the motor containing this stator lamination 000 can still work stably under harsh working conditions through this dual connection mechanism, thus ensuring the motor's operating efficiency.

[0064] For example, the number of multiple partitioned laminations 201 in any sub-laminated lamination group 200 can be the same as the number of motor poles. It should be noted that the number of motor poles refers to the number of magnetic poles in the motor, which directly affects the synchronous speed of the motor. For example, when the number of motor poles is 2, the motor can have two magnetic poles, and the number of partitioned laminations 201 in any sub-laminated lamination group 200 can also be 2. As another example, when the number of motor poles is 4, the motor can have four magnetic poles, and the number of partitioned laminations 201 in any sub-laminated lamination group 200 can also be 4. As another example, when the number of motor poles is 6, the motor can have six magnetic poles, and the number of partitioned laminations 201 in any sub-laminated lamination group 200 can also be 6. As yet another example, when the number of motor poles is 8, the motor can have eight magnetic poles, and the number of partitioned laminations 201 in any sub-laminated lamination group 200 can also be 8.

[0065] Here, each partition lamination 201 corresponds to a magnetic pole distribution. This ensures that each magnetic pole has a corresponding partition lamination 201 in any sub-laminate group 200, and each partition lamination 201 is designed with heat dissipation holes L, allowing for precise heat management of each magnetic pole to improve motor efficiency and performance. Furthermore, the number of motor poles is usually even, so the number of partition laminations 201 in any sub-laminate group 200 is also even. This ensures that the stator laminations 000 containing multiple partition laminations 201 maintain structural symmetry, further enhancing the motor's operational stability and efficiency.

[0066] In the embodiments of this application, please refer to Figure 9 , Figure 9 yes Figure 6 The diagram shows a partial enlarged view of the lamination body at point A. The length d1 of the snap-fit ​​protrusion P in the circumferential direction of the lamination body 100 can gradually increase along the direction from the lamination body 100 to any partition lamination 201.

[0067] Correspondingly, such as Figure 9 As shown, the length d2 of the bearing groove C on the stamping body 100 extending in the circumferential direction of the stamping body 100 gradually decreases along the direction from the stamping body 100 to the partitioned stamping 201.

[0068] like Figure 7 As shown, the extension length d3 of the snap-fit ​​groove Q in the partitioned stamping 201 in the circumferential direction of the stamping body 100 can gradually increase along the direction from the stamping body 100 to any partitioned stamping 201.

[0069] like Figure 7As shown, the extension length d4 of the first connecting portion 2013 in the partitioned stamping 201 in the circumferential direction of the stamping body 100, and the extension length d5 ​​of the second connecting portion 2014 in the partitioned stamping 201 in the circumferential direction of the stamping body 100, can both gradually decrease along the direction from the stamping body 100 to any partitioned stamping 201.

[0070] Thus, after the lamination body 100 in the stator lamination 000 is spliced ​​with each partition lamination 201, a more robust locking mechanism can be formed between the lamination body 100 and each partition lamination 201 in the radial direction of the lamination body 100. This locking mechanism ensures that each partition lamination 201 in the stator lamination 000 is not easily separated from the lamination body 100 in the radial direction of the lamination body 100, thereby making the spliced ​​lamination body 100 and each partition lamination 201 more firmly connected.

[0071] In the embodiments of this application, please refer to Figure 7 and Figure 10 , Figure 10 yes Figure 4 The diagram shows a partial enlarged view of the lamination body at point B. The snap-fit ​​protrusion P in the lamination body 100 has a first welding hole 102 on the side opposite to the lamination body 100, and each partition lamination 201 in any sub-lamination group 200 has a second welding hole 2015 communicating with the snap-fit ​​groove Q.

[0072] Wherein, after at least a portion of the snap-fit ​​protrusion P in the lamination body 100 is located within the snap-fit ​​groove Q in each partition lamination 201 of any sub-lamination group 200, the first welding hole 102 on the side of the snap-fit ​​protrusion P facing away from the lamination body 100 and the second welding hole 2015 communicating with the snap-fit ​​groove Q are connected, and the connected first welding hole 102 and second welding hole 2015 are used to carry the first solder, so that the lamination body 100 in the stator lamination 000 can be fixedly connected with the corresponding partition lamination 201. In this way, it can be ensured that the lamination body 100 in the stator lamination 000 and each partition lamination 201 are fused together under the action of the first solder, further strengthening the connection strength between the lamination body 100 and the partition lamination 201. Furthermore, the connection design between the first welding hole 102 and the second welding hole 2015 simplifies the welding process. No complicated alignment process is required. Welding can be carried out directly after the snap-fit ​​protrusion P and the snap-fit ​​groove Q are snapped together, which improves the convenience and efficiency of assembly.

[0073] For example, please refer to Figure 7 and Figure 11 , Figure 11 yes Figure 5The diagram shows a partial enlarged view of the partitioned lamination at point D. Each partitioned lamination 201 in any sub-laminated lamination group 200 also has a third welding hole 2016 and a fourth welding hole 2017 at both ends of its heat dissipation portion 2012.

[0074] In this sub-laminate group 200, after the first partition lamination 201a and the second partition lamination 201b are connected to the lamination body 100 in the stator lamination 000 by splicing, the third welding hole 2016 in the first partition lamination 201a and the fourth welding hole 2017 in the second partition lamination 201b can be connected. The connected third welding hole 2016 and the fourth welding hole 2017 can be used to carry the second solder, so that the first partition lamination 201a in any sub-laminate group 200 can be fixedly connected to the second partition lamination 201b.

[0075] Since the first partition lamination 201a and the second partition lamination 201b are two partition laminations 201 arranged adjacent to each other on the periphery of the lamination body 100 in the same sub-lamination group 200, after the first partition lamination 201a and the second partition lamination 201b in any sub-lamination group 200 are connected to the lamination body 100 in the stator lamination 000 by splicing, the third welding hole 2016 in the first partition lamination 201a and the fourth welding hole 2017 in the second partition lamination 201b can be connected. Furthermore, the interconnected third welding hole 2016 and fourth welding hole 2017 can be used to carry the second solder. In this way, additional welding fixing points can be provided for the connection between the first partitioned lamination 201a and the second partitioned lamination 201b in any sub-laminated lamination group 200. This can enhance the mechanical strength and overall stability of the connection between each partitioned lamination 201 in any sub-laminated lamination group 200, thereby ensuring better overall integrity of the sub-laminated lamination group 200 composed of each partitioned lamination 201.

[0076] Furthermore, the interconnected third welding hole 2016 and fourth welding hole 2017 are both located in the jaw portion of the stator lamination 000, that is, on the side away from the lamination body 100 in the stator lamination 000. Since the jaw portion is far from the main flow area of ​​the magnetic circuit, even if there are small splicing gaps or discontinuities, it will not cause a significant increase in magnetic resistance or magnetic flux leakage, thus ensuring that the impact on the overall magnetic performance of the motor is small, thereby ensuring the efficient operation of the motor.

[0077] For example, the lamination body 100 and each section lamination 201 in the stator lamination 000 are all stamped from silicon steel. Because silicon steel has high strength and toughness, the stator lamination 000 made of silicon steel can withstand the mechanical stress and vibration during motor operation, effectively reducing deformation. Furthermore, silicon steel also has good thermal conductivity, which ensures that the heat generated during motor operation is quickly dissipated, preventing localized overheating and further enhancing the long-term reliability of the stator lamination 000.

[0078] In this embodiment, the lamination body 100 of the stator lamination 000 can be annular, and the inner edge of the lamination body 100 has multiple protrusions that can be used to wind a coil. Thus, after winding the coil around the multiple protrusions in the lamination body 100, the number of turns between the coil and the lamination body 100 increases. With the same current, the increased number of coil turns makes the magnetic field denser, thereby increasing the motor's output power.

[0079] Furthermore, by stacking the same type of stator laminations to obtain the stator core, this stator core can carry more coil length within a limited volume, thereby ensuring a more compact internal structure and improving the space utilization of the stator core.

[0080] In summary, this application proposes a stator lamination, comprising: a lamination body and multiple sub-lamination groups, each sub-lamination group including multiple partitioned laminations. Since the stator lamination can be divided into the lamination body and multiple partitioned laminations, the area of ​​each partitioned lamination is relatively small. Therefore, in the production process of the stator lamination, only these smaller partitioned laminations need to be manufactured, and these smaller partitioned laminations are tightly connected to the lamination body using splicing technology. This allows for flexible layout on the same sheet of raw material to cut more partitioned laminations, effectively reducing waste and improving material utilization. Furthermore, since the distribution position and number of heat dissipation holes in each partitioned lamination within the same sub-lamination group are consistent, while for two partitioned laminations belonging to two different sub-lamination groups, at least one of the distribution position and number of heat dissipation holes in one partitioned lamination differs from at least one of the distribution position and number of heat dissipation holes in the other partitioned lamination. Therefore, by connecting the laminations in each section of any sub-laminate group to the lamination body through splicing, a stator lamination with specific heat dissipation holes can be obtained. Subsequently, by stacking stator laminations of the same type to form a stator core, the heat dissipation holes at the same location in each stator lamination are interconnected, ensuring that the stator core has a specific heat dissipation channel. This ensures that the lamination body, as the main frame of the stator lamination, remains unchanged, while any sub-laminate group can function as a replaceable, independent heat dissipation module. When facing the specific heat dissipation requirements of different motors, only sub-laminate groups with specific heat dissipation holes need to be selected or customized for replacement, without requiring a complete modification or replacement of the entire stator lamination system. This reduces costs and improves production and maintenance flexibility.

[0081] This application embodiment also provides a stator core, which includes a plurality of stacked stator laminations 000, wherein the stator laminations 000 are any of the stator laminations 000 described above. In this case, the stacked stator laminations 000 enhance the overall mechanical strength of the stator core, thereby ensuring the stability of the structure during motor operation and reducing vibration and noise generation.

[0082] This application also provides an electric motor, which includes a stator core and a rotor rotatably connected to the stator core, wherein the stator core is the aforementioned stator core.

[0083] In this application, when an external power source supplies power to the coils wound on the stator core formed by stacked stator laminations (000 layers), a magnetic field that varies with the current is generated around the coils. This magnetic field interacts with the magnetic field generated in the rotor to produce torque, thereby driving the rotor to rotate, thus realizing the conversion of electrical energy into mechanical energy.

[0084] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0085] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A stator lamination, characterized in that, include: The lamination body (100) and multiple sub-lamination groups (200); Each sub-plate group (200) includes multiple partitioned plates (201), each partitioned plate (201) having multiple heat dissipation holes (L); within the same sub-plate group (200), the distribution of heat dissipation holes (L) of each partitioned plate (201) is the same; for any two different sub-plate groups (200), the distribution of heat dissipation holes (L) of the partitioned plates (201) in one sub-plate group (200) is different from the distribution of heat dissipation holes (L) of the partitioned plates (201) in the other sub-plate group (200); The plurality of partitioned stamps (201) in any one of the sub-stamping groups (200) can be distributed circumferentially around the periphery of the stamping body (100), and the plurality of partitioned stamps (201) in any one of the sub-stamping groups (200) can be connected to the stamping body (100) by splicing.

2. The stator lamination according to claim 1, characterized in that, The outer edge of the lamination body (100) has a plurality of first snap-fit ​​portions (101); The partitioned lamination (201) has a second snap-fit ​​portion (2011) on the side facing the lamination body (100); The plurality of first snap-fit ​​parts (101) correspond one-to-one with the plurality of partitioned stamps (201) in any one of the sub-stamping groups (200), and each first snap-fit ​​part (101) snaps into the second snap-fit ​​part (2011) in the corresponding partitioned stamp (201).

3. The stator lamination according to claim 2, characterized in that, One of the first snap-fit ​​portion (101) and the second snap-fit ​​portion (2011) is a snap-fit ​​protrusion (P), and the other is a snap-fit ​​groove (Q); Wherein, after the stamp body (100) and the partition stamp (201) are spliced, at least a portion of the snap-fit ​​protrusion (P) is located in the snap-fit ​​groove (Q).

4. The stator lamination according to claim 3, characterized in that, When the first snap-fit ​​portion (101) is the snap-fit ​​protrusion (P) and the second snap-fit ​​portion (2011) is the snap-fit ​​groove (Q), the stamp body (100) also has a bearing groove (C) located in the circumferential direction of the stamp body (100) between two adjacent snap-fit ​​protrusions (P). Each of the partitioned laminations (201) includes: a heat dissipation part (2012), and a first connecting part (2013) and a second connecting part (2014) fixedly connected to the heat dissipation part (2012). The heat dissipation part (2012) has the plurality of heat dissipation holes (L), and the first connecting part (2013) and the second connecting part (2014) have the snap-fit ​​groove (Q). Wherein, any one of the bearing slots (C) in the stamping body (100) is used to bear the first connecting part (2013) in the first partition stamping (201a) and the second connecting part (2014) in the second partition stamping (201b); the first partition stamping (201a) and the second partition stamping (201b) are two partition stampings (201) arranged adjacent to each other on the periphery of the stamping body (100) in the same sub-stamping group (200).

5. The stator lamination according to claim 4, characterized in that, The length of the snap-fit ​​protrusion (P) extending in the circumferential direction of the outer periphery of the lamination body (100) gradually increases along the direction from the lamination body (100) to the partition lamination (201).

6. The stator lamination according to claim 4, characterized in that, The snap-fit ​​protrusion (P) has a first welding hole (102) on the side opposite to the punch body (100), and the partition punch (201) has a second welding hole (2015) communicating with the snap-fit ​​groove (Q). Wherein, after at least a portion of the snap-fit ​​protrusion (P) is located within the snap-fit ​​groove (Q), the first welding hole (102) and the second welding hole (2015) are connected, and the connected first welding hole (102) and the second welding hole (2015) are used to carry the first solder so that the lamination body (100) can be fixedly connected to the corresponding partition lamination (201).

7. The stator lamination according to claim 4, characterized in that, The heat dissipation part (2012) in the partitioned lamination (201) also has a third welding hole (2016) and a fourth welding hole (2017) at both ends; Wherein, after the first partition plate (201a) and the second partition plate (201b) are connected to the plate body (100) by splicing, the third welding hole (2016) in the first partition plate (201a) and the fourth welding hole (2017) in the second partition plate (201b) are connected, and the connected third welding hole (2016) and the fourth welding hole (2017) are used to carry the second solder, so that the first partition plate (201a) can be fixedly connected to the second partition plate (201b).

8. The stator lamination according to any one of claims 1 to 7, characterized in that, The lamination body (100) is annular, and the inner edge of the lamination body (100) has a plurality of protrusions for winding coils.

9. A stator core, characterized in that, include: A plurality of stator laminations are stacked together, each of the stator laminations being the stator laminations according to any one of claims 1 to 8.

10. An electric motor, characterized in that, include: The stator core as claimed in claim 9, and the rotor rotatably connected to the stator core.

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