Stator core, stator and motor

Abstract

The utility model provides a kind of stator core, stator and motor, stator core includes multiple first core parts and multiple second core parts, second core part includes yoke part and tooth part;Multiple first core parts and multiple second core parts are alternately distributed along the circumference of stator core;The yoke part of adjacent second core part and first core part is detachably connected;When the yoke part of each second core part is connected with the first core part on its adjacent two sides, the yoke part of multiple second core parts and multiple first core parts jointly form the yoke part of stator core, and the tooth part of multiple second core parts forms the tooth part of stator core.This stator core can adapt to the demand of different specifications of motor.

Description

Technical Field

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

[0002] With the continuous improvement of energy efficiency standards, DC motors are being used more and more widely in the home appliance market.

[0003] Currently, most common motor stator cores adopt chain or full-circle structures, while a small number use split stator core structures.

[0004] However, these traditional stator core structures are usually only suitable for motors of specific specifications, making it difficult to achieve universal design. Utility Model Content

[0005] The main purpose of this utility model is to provide a stator core, stator, and motor to meet the needs of motors of different specifications.

[0006] To achieve the above objectives, according to one aspect of the present invention, a stator core is provided, comprising a plurality of first core portions and a plurality of second core portions, each second core portion including a yoke portion and teeth portions; the plurality of first core portions and the plurality of second core portions are alternately distributed along the circumference of the stator core; the yoke portions of adjacent second core portions and first core portions are detachably connected; when the yoke portion of each second core portion is connected to the first core portions on both its adjacent sides, the yoke portions of the plurality of second core portions and the plurality of first core portions together form the yoke portion of the stator core, and the teeth portions of the plurality of second core portions form the teeth portions of the stator core.

[0007] Furthermore, the yoke of the adjacent second iron core and the first iron core are detachably connected by a mortise and tenon structure.

[0008] Furthermore, in the adjacent second core portion and the first core portion, one of them has a recessed locking groove and the other has a protruding locking portion; the locking portion is engaged in the locking groove.

[0009] Furthermore, from the bottom of the snap-fit ​​groove to the opening of the groove, the width of the snap-fit ​​groove gradually decreases; from the connecting end of the snap-fit ​​part to the free end, the width of the snap-fit ​​part gradually increases.

[0010] Furthermore, the groove wall of the snap-fit ​​groove is provided with a protruding part, and the snap-fit ​​part is provided with a recessed part, so that when the snap-fit ​​part is snapped into the snap-fit ​​groove, the protruding part is snapped into the recessed part.

[0011] Furthermore, the groove wall of the snap-fit ​​groove is provided with multiple protrusions, and the snap-fit ​​part is provided with multiple recesses, so that when the snap-fit ​​part is snapped into the snap-fit ​​groove, the multiple protrusions are snapped into the multiple recesses one by one.

[0012] Furthermore, the arc lengths of the two first core portions on adjacent sides of the second core portion may be equal or unequal.

[0013] Furthermore, among the plurality of first iron core sections, the arc lengths of any two first iron core sections may be equal or unequal.

[0014] According to another aspect of the present invention, a stator is provided, which includes the stator core described above.

[0015] According to another aspect of the present invention, an electric motor is provided, which includes the stator described above.

[0016] The stator core using the technical solution of this utility model includes multiple first core sections and multiple second core sections, each of which includes a yoke section and a toothed section.

[0017] Multiple first core sections and multiple second core sections are alternately distributed along the circumference of the stator core; the yokes of adjacent second core sections are detachably connected to the first core sections.

[0018] When the yoke of each second core part is connected to the first core parts on both sides of its adjacent sides, that is, when the yoke of each first core part is connected to the second core parts on both sides of its adjacent sides, the yokes of multiple second core parts and multiple first core parts together form the yoke of the stator core, and the teeth of multiple second core parts form the teeth of the stator core, that is, the teeth of multiple second core parts form multiple teeth of the stator core, and the teeth of each second core part form one tooth of the stator core.

[0019] The stator core of this application has the following advantages: 1. It is a modular stator core that can be assembled and combined to meet the needs of motors of different specifications; 2. It improves the manufacturing efficiency of the stator core and facilitates automated and large-scale production; 3. By combining the first core part and the second core part, the size of the stator core can be flexibly adjusted, improving its versatility; 4. The modular structure effectively reduces material waste and lowers production costs; 5. It optimizes the production process and improves production efficiency; 6. The modular design of the structure realizes the universal, standardized and efficient production of the stator core, and facilitates later maintenance and replacement; 7. It has the advantages of simple structure, easy manufacturing, low cost and strong applicability. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0021] Figure 1 A schematic diagram of the stator core according to the present invention is shown;

[0022] Figure 2 It shows Figure 1 A front view of the stator core in the image;

[0023] Figure 3 A schematic diagram of the structure of the first core portion of the stator core according to the present invention is shown;

[0024] Figure 4 A schematic diagram of the structure of the second core portion of the stator core according to the present invention is shown;

[0025] Figure 5 A schematic diagram of the mating structure of the first core portion and the second core portion of the stator core according to the present invention is shown.

[0026] Figure 6 It shows Figure 5 A front view of the mating structure of the first and second core sections of the stator core in the image;

[0027] Figure 7 A schematic diagram showing the distribution structure of multiple second core portions of a stator core according to the present invention is shown.

[0028] Figure 8 It shows Figure 7 A front view of multiple second core sections of the stator core.

[0029] The above figures include the following reference numerals:

[0030] 10. First iron core section; 11. Snap-fit ​​groove;

[0031] 20. Second iron core section; 21. Yoke section; 211. Snap-fit ​​section; 22. Tooth section. Detailed Implementation

[0032] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0034] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0035] This utility model provides a stator core; please refer to [reference needed]. Figures 1 to 8 The stator core includes a plurality of first core portions 10 and a plurality of second core portions 20, each of the second core portions 20 including a yoke portion 21 and a tooth portion 22.

[0036] Multiple first core portions 10 and multiple second core portions 20 are alternately distributed along the circumference of the stator core; the yoke 21 of adjacent second core portions 20 is detachably connected to the first core portion 10.

[0037] When the yoke 21 of each second core part 20 is connected to the two first core parts 10 on its adjacent sides, that is, when each first core part 10 is connected to the yoke 21 of the two second core parts 20 on its adjacent sides, the yoke 21 of the multiple second core parts 20 and the multiple first core parts 10 together form the yoke of the stator core, and the teeth 22 of the multiple second core parts 20 form the teeth of the stator core, that is, the teeth 22 of the multiple second core parts 20 form multiple teeth of the stator core, and the teeth 22 of each second core part 20 form one tooth of the stator core.

[0038] It should be noted that the number of the first core section 10 and the second core section 20 of the stator core can be determined according to actual needs; by adjusting the number of the first core section 10 and the second core section 20 of the stator core, stator cores of different specifications can be assembled to meet the needs of different models of motors.

[0039] Specifically, the number of the first core section 10 and the second core section 20 of the stator core are equal.

[0040] For example, if the number of the first core section 10 and the second core section 20 of the stator core is Z, then the number of slots in the motor is Z.

[0041] The first iron core 10 is composed of multiple stacked laminations, and the second iron core 20 is composed of multiple stacked laminations.

[0042] In this application, in order to enhance the structural stability of the stator core, the yoke 21 of the adjacent second core part 20 and the first core part 10 are detachably connected by a tenon and mortise structure; the tenon and mortise structure is used to achieve a stable connection between the second core part 20 and the first core part 10, thereby ensuring that the spliced ​​stator core remains stable during operation and avoiding structural loosening due to vibration or load changes.

[0043] In this application, in the yoke 21 of the adjacent second iron core portion 20 and the first iron core portion 10, one is provided with a retaining groove 11 and the other is provided with a retaining portion 211; the retaining portion 211 is engaged in the retaining groove 11 so that the yoke 21 of the adjacent second iron core portion 20 and the first iron core portion 10 can be detachably connected.

[0044] Specifically, the locking groove 11 and the locking part 211 form a mortise and tenon structure.

[0045] like Figures 1 to 8 As shown, in the adjacent second core portion 20 and the first core portion 10, the yoke portion 21 of the second core portion 20 is provided with a snap-fit ​​portion 211 protruding, and the first core portion 10 is provided with a snap-fit ​​groove 11 recessed.

[0046] Optionally, the width of the snap-fit ​​groove 11 gradually decreases from the bottom of the groove to the opening of the groove; the width direction of the snap-fit ​​groove 11 is perpendicular to the depth direction of the snap-fit ​​groove 11, and the width direction of the snap-fit ​​groove 11 is perpendicular to the axial direction of the stator core.

[0047] Optionally, the snap-fit ​​portion 211 has a connecting end and a free end disposed opposite to each other. The connecting end of the snap-fit ​​portion 211 is connected to the body of the yoke portion 21 of the second core portion 20 or the body of the first core portion 10. From the connecting end to the free end of the snap-fit ​​portion 211, the width of the snap-fit ​​portion 211 gradually increases; the width direction of the snap-fit ​​portion 211 is perpendicular to the distribution direction of the connecting end and the free end of the snap-fit ​​portion 211, and the width direction of the snap-fit ​​portion 211 is perpendicular to the axial direction of the stator core.

[0048] Optionally, the snap-fit ​​groove 11 is a dovetail groove.

[0049] Optionally, the groove wall of the snap-fit ​​groove 11 is provided with a protrusion, and the snap-fit ​​part 211 is provided with a recess, so that when the snap-fit ​​part 211 is snapped in the snap-fit ​​groove 11, the protrusion is snapped in the recess; in this way, the stability of the first iron core part 10 and the second iron core part 20 after splicing can be further guaranteed.

[0050] Optionally, the groove wall of the snap-fit ​​groove 11 is provided with a plurality of protrusions, and the snap-fit ​​part 211 is provided with a plurality of recesses, so that when the snap-fit ​​part 211 is snapped into the snap-fit ​​groove 11, the plurality of protrusions are snapped into the plurality of recesses one by one.

[0051] In this application, optionally, the arc lengths of the two first core portions 10 on adjacent sides of the second core portion 20 may be equal or unequal. The arc length of the first core portion 10 refers to the length of the first core portion 10 along the circumference of the stator core.

[0052] In this application, optionally, in the plurality of first core portions 10 of the stator core, the arc lengths of any two first core portions 10 are equal or unequal.

[0053] In this application, the radial height of each second core portion 20 is H; the width of the pole shoe of the tooth portion 22 of each second core portion 20 is 2L; and the width of the remaining portion of the tooth portion 22 excluding the pole shoe in each second core portion 20 is L.

[0054] For example, the value of H ranges from 15mm to 100mm; further, the value of H ranges from 25mm to 80mm. Further, the value of H ranges from 25mm to 60mm. Further, the value of H ranges from 25mm to 40mm.

[0055] For example, the value of L ranges from 10mm to 60mm, and the value of 2L ranges from 20mm to 120mm. Further, the value of L ranges from 20mm to 30mm, and the value of 2L ranges from 40mm to 60mm.

[0056] The cross-sectional area A affects the magnetic flux density B, where A = H × L and B = Φ / A, or B = Φ / (H × L); where Φ is the magnetic flux. Therefore, the ratio of L to H needs to be coordinated according to the magnetic flux requirements during the design process. Taking a small induction motor as an example, the value of L / H ranges from 0.3 to 0.6, and the value of A ranges from 15 mm. 2 Up to 40mm 2 .

[0057] For example, if L / H is 0.5, then the range of A is 8mm. 2 Up to 17mm 2 .

[0058] In this application, the radial height of each first core portion 10 is K; with the outer diameter of the stator core remaining unchanged, the inner diameter of the stator core can be changed by changing the value of K, so as to flexibly adjust the size of the stator core.

[0059] For example, the value of K ranges from 10mm to 60mm; further, the value of K ranges from 20mm to 30mm.

[0060] In this application, the first core portion 10 and the second core portion 20 are both manufactured by stamping process, and the multiple first core portions 10 and multiple second core portions 20 of the stator core can be spliced ​​and assembled by special tooling equipment.

[0061] For example, during the assembly process, the second iron core part 20 is first stacked and formed, and then a suitable first iron core part 10 is selected according to the required motor specifications. Multiple first iron core parts 10 are nested between multiple second iron core parts 20 to finally form a complete stator core structure.

[0062] During the assembly of the stator core, appropriate pressure can be applied to the insulating frame to make the copper wire windings more compact, thereby increasing the slot fill factor, which in turn improves the power density and performance of the motor.

[0063] During the stamping process of the first core section 10 and the second core section 20, the pressure, stroke and speed of the die can be adjusted to improve the forming accuracy and surface quality.

[0064] Surface treatment of the stator core: The surfaces of the first core section 10 and the second core section 20 are coated, such as with insulating varnish or anti-rust coating, to improve durability and insulation performance.

[0065] In this application, the first core section 10 can be made of different grades of silicon steel sheets, such as cold-rolled non-oriented silicon steel sheets or hot-rolled silicon steel sheets, to optimize magnetic properties and mechanical strength. The second core section 20 can also be made of different grades of silicon steel sheets, such as cold-rolled non-oriented silicon steel sheets or hot-rolled silicon steel sheets, to optimize magnetic properties and mechanical strength.

[0066] Optionally, the first core portion 10 and the second core portion 20 may be made of the same or different materials.

[0067] This utility model also provides a stator, which includes the stator core described above.

[0068] This utility model also provides an electric motor, which includes the stator described above.

[0069] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0070] In the stator core provided by this utility model, the stator core includes a plurality of first core portions 10 and a plurality of second core portions 20, each of the second core portions 20 including a yoke portion 21 and a tooth portion 22.

[0071] Multiple first core portions 10 and multiple second core portions 20 are alternately distributed along the circumference of the stator core; the yoke 21 of adjacent second core portions 20 is detachably connected to the first core portion 10.

[0072] When the yoke 21 of each second core portion 20 is connected to the first core portion 10 on both sides of its adjacent sides, that is, when each first core portion 10 is connected to the yoke 21 of the second core portion 20 on both sides of its adjacent sides, the yoke 21 of the multiple second core portions 20 and the multiple first core portions 10 together form the yoke of the stator core, and the teeth 22 of the multiple second core portions 20 form the teeth of the stator core, that is, the teeth 22 of the multiple second core portions 20 form multiple teeth of the stator core, and the teeth 22 of each second core portion 20 form one tooth of the stator core.

[0073] The stator core of this application has the following advantages: 1. It is a modular stator core that can be assembled and combined to meet the needs of motors of different specifications; 2. It improves the manufacturing efficiency of the stator core and facilitates automated and large-scale production; 3. By combining the first core part 10 and the second core part 20, the size of the stator core can be flexibly adjusted, improving its versatility; 4. The modular structure effectively reduces material waste and lowers production costs; 5. It optimizes the production process and improves production efficiency; 6. The modular design of the structure realizes the universal, standardized and efficient production of the stator core, and facilitates later maintenance and replacement; 7. It has the advantages of simple structure, easy manufacturing, low cost and strong applicability.

[0074] The stator core of this application is a split type stator core.

[0075] This application enables diverse configurations of the stator core to adapt to different application scenarios and performance requirements, allowing for flexible adjustment and optimization based on various practical needs; it also facilitates improved magnetic field distribution and reduced eddy current losses.

[0076] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0077] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0078] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A stator core, characterized in that, It includes multiple first iron core portions (10) and multiple second iron core portions (20), wherein the second iron core portion (20) includes a yoke portion (21) and a tooth portion (22); The plurality of first core portions (10) and the plurality of second core portions (20) are alternately distributed along the circumference of the stator core; the yoke (21) of adjacent second core portions (20) and the first core portion (10) are detachably connected; When the yoke (21) of each second core part (20) is connected to the first core parts (10) on both sides adjacent to it, the yoke (21) of the plurality of second core parts (20) and the plurality of first core parts (10) together form the yoke of the stator core, and the teeth (22) of the plurality of second core parts (20) form the teeth of the stator core.

2. The stator core according to claim 1, characterized in that, The yoke (21) of the adjacent second core portion (20) and the first core portion (10) are detachably connected by a tenon and mortise structure.

3. The stator core according to claim 1, characterized in that, In the adjacent second core portion (20) and the first core portion (10), one of the yoke portion (21) is provided with a snap-fit ​​groove (11) and the other is provided with a snap-fit ​​portion (211); the snap-fit ​​portion (211) is snapped into the snap-fit ​​groove (11).

4. The stator core according to claim 3, characterized in that, From the bottom of the slot (11) to the opening, the width of the slot (11) gradually decreases; from the connecting end to the free end of the snap-fit ​​part (211), the width of the snap-fit ​​part (211) gradually increases.

5. The stator core according to claim 3, characterized in that, The groove wall of the snap-fit ​​groove (11) is provided with a protruding part, and the snap-fit ​​part (211) is provided with a recessed part, so that when the snap-fit ​​part (211) is snapped in the snap-fit ​​groove (11), the protruding part is snapped in the recessed part.

6. The stator core according to claim 5, characterized in that, The groove wall of the snap-fit ​​groove (11) is provided with a plurality of protrusions, and the snap-fit ​​part (211) is provided with a plurality of recesses, so that when the snap-fit ​​part (211) is snapped into the snap-fit ​​groove (11), the plurality of protrusions are snapped into the plurality of recesses one by one.

7. The stator core according to claim 1, characterized in that, The arc lengths of the two first core portions (10) on adjacent sides of the second core portion (20) are equal or unequal.

8. The stator core according to claim 1, characterized in that, Among the plurality of first core portions (10), the arc lengths of any two first core portions (10) are equal or unequal.

9. A stator, characterized in that, The stator core includes any one of claims 1 to 8.

10. An electric motor, characterized in that, Includes the stator as described in claim 9.

Images