Stator blade, stator iron core, stator, and motor

Abstract

The present application provides a stator blade, a stator iron core, a stator, and a motor. The stator blade is applied to a motor and comprises: a blade body, wherein an accommodating hole is formed on the blade body to accommodate a rotor assembly of the motor; and a plurality of stator slot units, arranged on the blade body along the periphery of the accommodating hole, wherein each stator slot unit comprises a plurality of stator slots, the point of each stator slot farthest from the center of the accommodating hole is a farthest point, the distance between the farthest point and the center of the accommodating hole is the radial size of the stator slot, and the radial sizes of the plurality of stator slots are sequentially increased in the clockwise or anticlockwise direction of the accommodating hole.

Description

Stator laminations, stator cores, stators and motors

[0001] The applicant declares that this application claims priority to the Chinese patent application submitted to the China Patent Office on September 28, 2023, with application number "202322653586.9" and invention name "Stator Punching, Stator Core, Stator and Motor", all of which are incorporated into this application by introduction. Technical Field

[0002] The present application relates to the field of motors, and in particular to a stator punching sheet, a stator core, a stator and a motor. Background Art

[0003] The motor in the related art has a stator punching sheet including stator slots, and the shape of the stator slots on the stator punching sheet is generally consistent. When the motor adopts such a stator punching sheet, the slot fill rate is relatively small and the magnetic density distribution is uneven. On the one hand, this structure cannot fully utilize the material. On the other hand, the uneven magnetic field distribution is likely to cause noise and excessive stator temperature problems, which directly affects the normal use of the motor. Technical Solutions

[0004] This application aims to solve at least one of the technical problems existing in the prior art or related art.

[0005] Therefore, one object of the present application is to provide a stator punching sheet.

[0006] The second object of the present application is to provide a stator core.

[0007] The third object of the present application is to provide a stator.

[0008] The third object of the present application is to provide a motor.

[0009] To achieve the above-mentioned purpose, the technical solution of the first aspect of the present application provides a stator punching sheet for use in a motor, wherein the stator punching sheet includes: a punching sheet body, on which a receiving hole is provided to accommodate the rotor assembly of the motor; a plurality of stator slot units, which are arranged on the punching sheet body along the periphery of the receiving hole, each stator slot unit including a plurality of stator slots, the point of the stator slot farthest from the center of the receiving hole is the farthest point, and the distance between the farthest point and the center of the receiving hole is the radial dimension of the stator slot, and the radial dimensions of the plurality of stator slots increase successively along the clockwise or counterclockwise direction of the receiving hole.

[0010] The stator lamination provided by the technical solution of the present application is used in a motor. The stator lamination includes a lamination body, on which a stator slot unit is provided. The multiple stator slots in the stator slot unit have radial dimensions that increase sequentially in a clockwise or counterclockwise direction, which improves material utilization. By providing stator slots with sequentially increasing radial dimensions, stator material utilization can be improved, slot fill rate can be rationally utilized, and stator magnetic flux density can be made more uniform, thereby improving the overall performance of the motor.

[0011] Of course, the stator slot unit may also include slots with constant radial dimensions, and these slots may be arranged on both sides or one side of slots with successively increasing radial dimensions.

[0012] Furthermore, the stator slot is an axisymmetric structure, and the farthest point is the intersection of one end of the stator slot away from the accommodating hole and the axis of symmetry.

[0013] Optionally, the stator slots are of an axisymmetric structure, and the multiple stator slots include a first type of stator slots and a second type of stator slots. The symmetry axis of the second type of stator slots is arranged along the radial direction of the accommodating hole, and the symmetry axis of the first type of stator slots is arranged at a preset angle to the radial direction of the accommodating hole.

[0014] In this technical solution, the shape of the stator slots can be set to the first or second type according to their location. By setting different types of stator slots, the stator material can be better utilized, the stator material utilization rate can be improved, the slot fill rate can be reasonably utilized, and the stator magnetic flux density can be made more uniform, thereby improving the overall performance of the motor.

[0015] Furthermore, the stator slot unit includes a first stator slot and a second stator slot, and a radial dimension of the second stator slot is larger than a radial dimension of the first stator slot.

[0016] Optionally, the radial dimension R1 of the first stator slot and the radial dimension R2 of the second stator slot satisfy the following relationship: 1 mm < R2 - R1 < 2 mm. This configuration makes the structure of the first stator slot and the second stator slot more reasonable, avoids a large difference in the radial dimensions of the two, and thus better improves material utilization.

[0017] Optionally, the stator slot unit further includes: a third stator slot located on a side of the second stator slot away from the first stator slot, the radial dimension of the third stator slot being greater than the radial dimension of the second stator slot; and a fourth stator slot located on a side of the third stator slot away from the second stator slot, the radial dimension of the fourth stator slot being greater than the radial dimension of the third stator slot.

[0018] In this embodiment, the stator slot unit includes four slots whose radial dimensions increase sequentially in the same direction. The arrangement of the four slots makes the structure of the stator punching sheet more reasonable and the number of slots more reasonable.

[0019] Furthermore, the radial dimension R2 of the second stator slot, the radial dimension R3 of the third stator slot, and the radial dimension R4 of the fourth stator slot satisfy the following relationship: 3.5 mm < R3 - R2 < 5.5 mm; and / or 1 mm < R4 - R3 < 2 mm.

[0020] This arrangement makes the structures of the first stator slot, the second stator slot, the third stator slot, and the fourth stator slot more reasonable, and can avoid excessive differences in the radial dimensions of the four slots, thereby better improving material utilization.

[0021] Optionally, the stator slot is an axisymmetric structure, and the multiple stator slots include first-type stator slots and second-type stator slots. The symmetry axis of the first-type stator slot is set at a preset angle to the radial direction of the accommodating hole, and the symmetry axis of the second-type stator slot is set along the radial direction of the accommodating hole; the first stator slot and the second stator slot are first-type stator slots, and the third stator slot and the fourth stator slot are second-type stator slots.

[0022] In this technical solution, the first and second stator slots are first-class stator slots, meaning their sidewalls are not radially parallel. Instead, they are radially offset from each other. This allows them to be relatively larger, thereby increasing the slot fill factor. The third and fourth stator slots, however, are radially arranged and are standard stator slots.

[0023] Optionally, two stator slot units constitute a stator slot unit group, and the two stator slot units in the stator slot unit group are arranged axially symmetrically; the stator punching sheet includes multiple stator slot unit groups, and the multiple stator slot unit groups are evenly distributed along the circumference of the accommodating hole.

[0024] In this technical solution, a plurality of stator slot unit groups are provided on the stator lamination, and each stator slot unit group includes two stator slot units. This structure allows the stator slots of the stator lamination to be repeated in groups, thus ensuring the symmetry of the stator lamination structure.

[0025] Optionally, the punch body includes one of a rectangular plate, a square plate and a circular plate. Of course, the punch body can also be arranged into other shapes according to actual needs.

[0026] Optionally, the punch body includes a square plate, the side length of the punch body is L, the radius of the accommodating hole is R5, and 0.64<2R5 / L<0.67.

[0027] In this solution, the relationship between the side length of the punch body and the radius of the receiving hole is limited, so as to avoid the receiving hole being designed to be too large or too small, thereby reserving reasonable space for subsequent grooving on the punch body.

[0028] Furthermore, the end of the stator slot away from the receiving hole is an arcuate surface or a plane. When the end of the stator slot away from the receiving hole is an arcuate surface, the farthest point is the vertex of the arc of the arcuate surface. When the end of the stator slot away from the receiving hole is a plane, the farthest point is the midpoint of the plane projection.

[0029] The technical solution of the second aspect of the present application provides a stator core, including the stator punching provided by any technical solution of the first aspect.

[0030] The stator core provided according to the technical solution of the present application includes stator punchings, and therefore has the beneficial effects of the stator punchings provided by any of the technical solutions of the first aspect, which will not be repeated here.

[0031] The technical solution of the third aspect of the present application provides a stator, including the stator core provided by any technical solution of the second aspect.

[0032] The stator provided according to the technical solution of the present application includes the stator core provided by any one of the technical solutions of the second aspect, and therefore has the beneficial effects of the stator core provided by any one of the technical solutions of the second aspect, which will not be repeated here.

[0033] The technical solution of the fourth aspect of the present application provides a motor, including the stator punching provided by any of the technical solutions of the first aspect, or the stator core provided by any of the technical solutions of the second aspect, or the stator provided by any of the technical solutions of the third aspect.

[0034] The motor provided according to the technical solution of the present application includes the stator punching sheets or stator core or stator of any of the above embodiments, so it has the beneficial effects of the stator punching sheets or stator core or stator provided by any of the above embodiments, which will not be repeated here.

[0035] Additional aspects and advantages of the present application will become apparent in the following description or may be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] 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:

[0037] FIG1 is a schematic structural diagram of a stator punching sheet provided in one embodiment of the present application;

[0038] FIG2 is another schematic structural diagram of a stator punching sheet provided in one embodiment of the present application;

[0039] FIG3 is a schematic diagram of a partial structure of a stator punching provided in an embodiment of the present application.

[0040] The corresponding relationship between the reference numerals and component names in Figures 1 to 3 is as follows:

[0041] 1 Punching sheet body, 12 Accommodating hole, 14 Positioning hole, 2 Stator slot unit, 20 First stator slot, 22 Second stator slot, 24 Third stator slot, 26 Fourth stator slot. Modes for Carrying Out the Invention

[0042] In order to more clearly understand the above-mentioned objects, features and advantages of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other in the absence of conflict.

[0043] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0044] As shown in Figures 1 to 3 , an embodiment of the first aspect of the present application provides a stator punching sheet for use in a motor. The stator punching sheet includes a punching sheet body 1 and a plurality of stator slot units 2 .

[0045] The lamination body 1 is provided with a receiving hole 12 to accommodate the motor's rotor assembly. Multiple stator slot units 2 are arranged around the receiving hole 12. Each stator slot unit 2 includes multiple stator slots. The point of the stator slot farthest from the center O of the receiving hole 12 is the farthest point (such as points A1, A2, A3, and A4 in Figure 1). The distance between the farthest point and the center O of the receiving hole 12 is the radial dimension of the stator slot.

[0046] 1 , the radial dimensions of the plurality of stator slots increase in sequence along the counterclockwise direction of the receiving hole 12. Of course, the radial dimensions of the plurality of stator slots may also increase in sequence along the counterclockwise direction of the receiving hole 12.

[0047] The stator punching provided in accordance with the embodiment of the present application is used for a motor. The stator punching includes a punching body 1, on which a stator slot unit 2 is provided. The stator slot unit 2 includes at least two stator slots with different radial dimensions, namely a first stator slot 20 and a second stator slot 22. By providing stator slots with different radial dimensions, the utilization rate of the stator material can be improved, the slot fill rate can be reasonably utilized, and the stator magnetic flux density can be made more uniform, thereby improving the overall performance of the motor. The radial dimensions of the multiple stator slots on the stator slot unit 2 increase successively in a clockwise or counterclockwise direction, which can improve the material utilization rate. Of course, the stator slot unit 2 can also include slots with constant radial dimensions, and these slots can be provided on both sides or one side of the slots with successively increasing radial dimensions.

[0048] Furthermore, the number of the plurality of stator slots is at least three.

[0049] In one specific embodiment, as shown in FIG3 , the stator slots are axisymmetric. The plurality of stator slots include first-type stator slots and second-type stator slots. The axis of symmetry of the second-type stator slots is arranged along the radial direction of the receiving hole 12 (as shown in FIG1 ), while the axis of symmetry of the first-type stator slots is arranged at a predetermined angle to the radial direction of the receiving hole 12.

[0050] In this embodiment, the shape of the stator slots can be set to the first or second type according to their position. By setting stator slots of different types, the stator material can be better utilized, the stator material utilization rate can be improved, the slot fill rate can be reasonably utilized, and the stator magnetic flux density can be made more uniform, thereby improving the overall performance of the motor.

[0051] In a specific embodiment, the stator slot unit 2 includes a first stator slot 20 and a second stator slot 22 , and a radial dimension of the second stator slot 22 is larger than a radial dimension of the first stator slot 20 .

[0052] The specific direction of the radial direction of the receiving hole 12 is shown in Figure 1. The specific direction of the circumferential direction of the receiving hole 12 is shown in Figure 1.

[0053] Furthermore, as shown in Figure 1 , the radial dimension R1 of the first stator slot 20 and the radial dimension R2 of the second stator slot 22 satisfy the following relationship: 1 mm < R2 - R1 < 2 mm. This arrangement makes the structure of the first stator slot 20 and the second stator slot 22 more reasonable, avoiding a large difference in their radial dimensions, thereby improving material utilization.

[0054] In a specific embodiment, as shown in FIG1 , the stator slot unit 2 further includes a third stator slot 24 and a fourth stator slot 26. The third stator slot 24 is located on a side of the second stator slot 22 away from the first stator slot 20. The radial dimension of the third stator slot 24 is greater than the radial dimension of the second stator slot 22. The fourth stator slot 26 is located on a side of the third stator slot 24 away from the second stator slot 22. The radial dimension of the fourth stator slot 26 is greater than the radial dimension of the third stator slot 24.

[0055] In this embodiment, the stator slot unit 2 includes four slots whose radial dimensions increase sequentially in the same direction. The arrangement of the four slots makes the structure of the stator punching sheet more reasonable and the number of slots more reasonable.

[0056] Furthermore, as shown in FIG1 , the radial dimension R2 of the second stator slot 22 , the radial dimension R3 of the third stator slot 24 , and the radial dimension R4 of the fourth stator slot 26 satisfy the following relationship: 3.5 mm < R3 − R2 < 5.5 mm; and / or 1 mm < R4 − R3 < 2 mm.

[0057] This arrangement makes the structures of the first stator slot 20 , the second stator slot 22 , the third stator slot 24 , and the fourth stator slot 26 more reasonable, and can avoid excessive differences in radial dimensions of the four slots, thereby better improving material utilization.

[0058] In one embodiment, as shown in FIG1 , the stator slots are axisymmetric. The plurality of stator slots include first-type stator slots and second-type stator slots. The symmetry axis of the first-type stator slots is arranged at a predetermined angle to the radial direction of the receiving hole 12 , while the symmetry axis of the second-type stator slots is arranged along the radial direction of the receiving hole 12 .

[0059] The first stator slot 20 and the second stator slot 22 are first-type stator slots, and the third stator slot 24 and the fourth stator slot 26 are second-type stator slots.

[0060] In this embodiment, the first and second stator slots 20, 22 are first-class stator slots, meaning their sidewalls are not radially parallel. Instead, they are radially offset. This allows the first and second stator slots 20, 22 to be relatively larger, thereby increasing the slot fill factor. The third and fourth stator slots 24, 26 are radially arranged and are standard stator slots.

[0061] In one specific embodiment, as shown in Figures 1 and 2 , two stator slot units 2 constitute a stator slot unit group. The two stator slot units 2 in the stator slot unit group are arranged axially symmetrically. The stator lamination includes multiple stator slot unit groups, which are evenly distributed along the circumference of the receiving hole 12 (as shown in Figure 1 ).

[0062] In this embodiment, a plurality of stator slot unit groups are provided on the stator lamination, and each stator slot unit group includes two stator slot units 2. This structure allows the stator slots of the stator lamination to be repeated in groups, thus ensuring the symmetry of the structure of the stator lamination.

[0063] In a specific embodiment, the punch body 1 includes one of a rectangular plate, a square plate and a circular plate. Of course, the punch body 1 can also be set to other shapes according to actual needs.

[0064] In a specific embodiment, as shown in Figures 1 and 2, the punch body 1 comprises a square plate, and the side length of the punch body 1 is L. The radius of the receiving hole 12 is R5, wherein 0.64<2R5 / L<0.67.

[0065] In this solution, the relationship between the side length of the punch body 1 and the radius of the accommodating hole 12 is limited, so as to avoid the accommodating hole 12 being designed to be too large or too small, thereby reserving reasonable space for subsequent grooving on the punch body 1.

[0066] Furthermore, as shown in Figures 1, 2, and 3, the end of the stator slot away from the receiving hole 12 is an arcuate surface or a flat surface. When the end of the stator slot away from the receiving hole 12 is an arcuate surface, the farthest point is the vertex of the arc of the arcuate surface. When the end of the stator slot away from the receiving hole 12 is a flat surface, the farthest point is the midpoint of the projection of the flat surface.

[0067] Furthermore, as shown in FIG. 2 , a plurality of positioning holes 14 are provided on the punch body 1 to facilitate installation of the punch body 1 .

[0068] An embodiment of the second aspect of the present application provides a stator core (not shown in the figure), including the stator punching provided by any embodiment of the first aspect.

[0069] The stator core provided according to the embodiments of the present application includes stator punching sheets, and therefore has the beneficial effects of the stator punching sheets provided in any embodiment of the first aspect, which will not be described in detail here.

[0070] An embodiment of the third aspect of the present application provides a stator (not shown in the figure), including the stator core provided by any embodiment of the second aspect.

[0071] The stator provided according to the embodiments of the present application includes the stator core provided by any one of the embodiments of the second aspect, and therefore has the beneficial effects of the stator core provided by any one of the embodiments of the second aspect, which will not be repeated here.

[0072] An embodiment of a fourth aspect of the present application provides a motor (not shown), comprising the stator punching provided by any embodiment of the first aspect, or the stator core provided by any embodiment of the second aspect, or the stator provided by any embodiment of the third aspect.

[0073] The motor provided according to the embodiments of the present application has the beneficial effects of the stator punching sheets, stator core or stator provided in any of the above embodiments due to the stator punching sheets, stator core or stator provided in any of the above embodiments, which will not be repeated here.

[0074] In a specific embodiment, as shown in Figures 1 to 3, the motor includes: a stator punching sheet, which includes: a stator slot, a hollow inner circular hole (equivalent to the accommodating hole 12) is formed in the middle of the stator punching sheet, and the stator slot is arranged at the radial extension of the hollow inner circular hole. The stator slot includes a plurality of first stator slots 20, a second stator slot 22, a third stator slot 24 and a fourth stator slot 26, wherein the radial dimension of the fourth stator slot 26 is greater than the radial dimension of the third stator slot 24, the radial dimension of the third stator slot 24 is greater than the radial dimension of the second stator slot 22, and the radial dimension of the second stator slot 22 is greater than the radial dimension of the first stator slot 20, R1 is the radial dimension of the first stator slot 20, R2 is the radial dimension of the second stator slot 22, R3 is the radial dimension of the third stator slot 24, and R4 is the radial dimension of the fourth stator slot 26, wherein 1mm<R2-R1<2mm, 3.5mm<R3-R2<5.5mm, and 1mm<R4-R3<2mm.

[0075] Furthermore, in the stator punching sheet, the two sides adjacent to the third stator slot 24 and the fourth stator slot 26 are parallel to the ray starting from the origin and located at the center of these two sides; the two sides adjacent to the second stator slot 22 and the third stator slot 24 are parallel to the ray starting from the origin and located at the center of these two sides; but the two sides adjacent to the first stator slot 20 and the second stator slot 22 are not parallel to the ray starting from the origin and located at the center of these two sides.

[0076] Furthermore, in the stator punching sheet, there are four stator slot units 2 , and each stator slot unit 2 includes two first stator slots 20 , two second stator slots 22 , two third stator slots 24 and two fourth stator slots 26 .

[0077] Furthermore, the stator punching sheet is rectangular or square, the side length of the stator punching sheet is L, and the radius of the hollow inner hole is R5, wherein 0.64<2R5 / L<0.67.

[0078] The stator punching sheet provided in this embodiment has the advantages of improving the uniformity of stator magnetic flux density and improving motor performance.

[0079] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present application. In this specification, schematic representations 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 any one or more embodiments or examples.

[0080] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A stator punching sheet for a motor, wherein: The stator punching sheet comprises: A punching body, wherein a receiving hole is provided on the punching body to receive a rotor assembly of the motor; A plurality of stator slot units are arranged on the punching sheet body along the periphery of the accommodating hole, each of the stator slot units includes a plurality of stator slots, the point of the stator slot farthest from the center of the accommodating hole is the farthest point, the distance between the farthest point and the center of the accommodating hole is the radial dimension of the stator slot, and the radial dimensions of the plurality of stator slots increase successively in the clockwise or counterclockwise direction of the accommodating hole.

2. The stator sheet according to claim 1, wherein: The stator slots are of an axisymmetric structure, and the plurality of stator slots include a first type of stator slots and a second type of stator slots. The symmetry axis of the second type of stator slots is arranged along the radial direction of the accommodating hole, and the symmetry axis of the first type of stator slots is arranged at a preset angle to the radial direction of the accommodating hole.

3. The stator sheet according to claim 1, wherein: The stator slot unit includes a first stator slot and a second stator slot, wherein a radial dimension of the second stator slot is greater than a radial dimension of the first stator slot.

4. The stator sheet according to claim 3, wherein: The first stator slot radial dimension R1 and the second stator slot radial dimension R2 satisfy the following relationship: 1mm<R2-R1<2mm.

5. The stator sheet according to claim 3, wherein: The stator slot unit further comprises: a third stator slot, located on a side of the second stator slot away from the first stator slot, wherein a radial dimension of the third stator slot is greater than a radial dimension of the second stator slot; The fourth stator slot is located on a side of the third stator slot away from the second stator slot, and a radial dimension of the fourth stator slot is greater than a radial dimension of the third stator slot.

6. The stator sheet according to claim 5, wherein: The radial dimension R2 of the second stator slot, the radial dimension R3 of the third stator slot, and the radial dimension R4 of the fourth stator slot satisfy the following relationship: 3.5 mm<R3-R2<5.5 mm; and / or 1mm<R4-R3<2mm.

7. The stator sheet according to claim 5, wherein: The stator slots are of an axisymmetric structure, and the plurality of stator slots include a first type of stator slots and a second type of stator slots, wherein the symmetry axis of the first type of stator slots is arranged at a preset angle with the radial direction of the receiving hole, and the symmetry axis of the second type of stator slots is arranged along the radial direction of the receiving hole; The first stator slot and the second stator slot are the first type of stator slots, and the third stator slot and the fourth stator slot are the second type of stator slots.

8. The stator sheet according to any one of claims 1 to 7, wherein: The two stator slot units constitute a stator slot unit group, and the two stator slot units in the stator slot unit group are arranged axially symmetrically; The stator punching sheet includes a plurality of stator slot unit groups, and the plurality of stator slot unit groups are evenly distributed along the circumference of the accommodating hole.

9. The stator sheet according to any one of claims 1 to 7, wherein: The punching sheet body includes one of a rectangular plate, a square plate and a circular plate.

10. The stator sheet according to any one of claims 1 to 7, wherein: The punch body comprises a square plate, the side length of the punch body is L, the radius of the receiving hole is R5, wherein 0.64<2R5 / L<0.

67.

11. A stator core, wherein: include: A stator lamination according to any one of claims 1 to 10.

12. A stator, wherein: It comprises the stator core as claimed in claim 11.

13. A motor, wherein: include: The stator lamination according to any one of claims 1 to 10; or The stator core according to claim 11; or A stator as claimed in claim 12.

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