Stator core assembly, stator, and motor

Abstract

A stator core assembly, stator, and motor are provided, wherein the stator core assembly includes a core part (100) and an insulating frame chain (200). The core part (100) includes a plurality of cores (110), and the insulating frame chain (100) includes a plurality of insulating frames (210) connected in sequence. The cores (110) include a yoke part (120) connected thereto, a teeth part (130), and a pole piece part (140). The pole piece part (140) is located at an end of the teeth part (130) remote from the yoke part (120). The insulating frame (210) has a through cavity (211) formed therein, and the teeth part (130) is disposed within the through cavity (211).

Description

Technical Field

[0001] The present application claims priority to a Chinese patent application filed on November 14, 2022, with application number 202211421241.4 and titled "Stator Core Assembly, Stator and Motor", the entire content of which is incorporated into the present application by reference.

[0002] The present application relates to the technical field of motors, in particular to a stator core assembly, a stator and a motor.

Background Art

[0003] In the related art, in the manufacturing process of a motor, it is necessary to roll a rod-shaped core to obtain an annular core, and then carry out the subsequent manufacturing process. The structure of the conventional rod-shaped core is such that when processing core punching sheets, the core punching sheets are manufactured as a structure in which a plurality of core pole pieces are connected to each other, and the outer insulating frames thereof are independent of each other and can be individually attached and detached. In such a structure, the plurality of core pole pieces are directly connected to each other, the efficiency of electromagnetic energy conversion is relatively low, which affects the performance of the outer rotor motor.

Summary of Invention

Problems to be Solved by the Invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, the present application proposes a stator core assembly, a stator applying the above stator core assembly, and a motor applying the above stator.

Means for Solving the Problems

[0005] According to an embodiment of the first aspect of this application, the stator core assembly includes a core component and an insulating frame chain, the core component includes a plurality of cores, and the insulating frame chain includes a plurality of insulating frames connected in sequence, wherein the core includes a connected yoke portion, a teeth portion, and a pole piece portion, the pole piece portion being located at the end of the teeth portion away from the yoke portion, and the insulating frame is provided with a through cavity, the teeth portion being located within the through cavity.

[0006] According to some embodiments of this application, the core and the insulating frame correspond to each other on a one-to-one basis.

[0007] According to some embodiments of this application, the insulating frame is fitted with a pole piece baffle, the pole piece baffle abuts against the side surface of the pole piece facing the yoke, and a relief groove is formed between the pole piece baffles of two adjacent insulating frames.

[0008] According to some embodiments of this application, the relief groove is sector-shaped, the angle of inclusion is α, the number of cores is x, and the product of α and x is 360° or more.

[0009] According to some embodiments of this application, a bent groove is provided on the side of the pole piece baffle away from the pole piece, the bent groove is arranged along the axial direction of the core component, and one bent groove is distributed on each side of the relief groove in the circumferential direction of the core component.

[0010] According to some embodiments of this application, the outer surface of the pole piece is an arcuate surface, and the radius of curvature of the arcuate surface is r, and the wall surface of the bent groove is a cylindrical surface, and the radius of the cylindrical surface is 0.002r to 0.007r.

[0011] According to some embodiments of the present application, a yoke portion baffle is disposed on the insulating frame, the yoke portion baffle abuts against the yoke portion, a hook corner is disposed at an edge of the yoke portion baffle, and the hook corner extends toward the pole piece portion.

[0012] According to some embodiments of the present application, an outer side surface of the pole piece portion is an arc surface, a radius of curvature of the arc surface is r, a width of an inner side surface of the pole piece portion along a circumferential direction of the arc surface is c, a length of the insulating frame chain is L, the number of the cores is x, and the relationship xc<L<2xr*sin(180° / x) is satisfied.

[0013] According to some embodiments of the present application, the insulating frame chain includes a first frame chain and a second frame chain, the first frame chain and the second frame chain are combined to form the insulating frame chain, and are disposed on both axial sides of the core component.

[0014] According to some embodiments of the present application, the insulating frame chain is of an integral structure, and the insulating frame chain and the core component are integrally molded by an overmolding process.

[0015] According to some embodiments of the present application, the plurality of cores of the core component are independent of each other, and the plurality of cores are connected via the insulating frame chain.

[0016] According to some embodiments of the present application, the plurality of cores are arranged in sequence, and two adjacent cores are connected via a flux barrier.

[0017] According to some embodiments of the present application, the core has a laminated structure of a plurality of silicon steel sheets, the flux barrier connects one layer of the silicon steel sheets of two adjacent core components, and in the circumferential direction of the core component, the layers where two adjacent sets of the flux barriers are located are different.

[0018] According to some embodiments of the present application, the flux barrier is located between the pole piece portions of two adjacent cores, and a curved groove is provided on the side surface of the flux barrier facing the yoke portion.

[0019] According to the stator of the embodiment of the second aspect of the present application, the stator core assembly described in the embodiment of the first aspect is included.

[0020] According to the motor of the embodiment of the third aspect of the present application, the stator described in the embodiment of the second aspect is included.

[0021] Additional aspects and advantages of the present application will be set forth in part in the description which follows, and in part will become apparent from the description, or may be learned by practice of the present application. Additional aspects and advantages of the present application will become apparent and easy to understand in the description of the embodiments taken in conjunction with the accompanying drawings described below. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] [Figure 1] It is a front view of a stator core assembly according to some embodiments of the present application in an expanded state. [Figure 2] It is a partially enlarged view of part A in Figure 1. [Figure 3] It is a partially enlarged view of part B in Figure 1. [Figure 4] It is an exploded schematic view of a stator core assembly according to some embodiments of the present application. [Figure 5] It is a partially enlarged view of part C in Figure 4. [Figure 6] It is a partial structural schematic view of a stator core assembly according to some embodiments of the present application. [Figure 7] It is a cross-sectional view of a core component according to some embodiments of the present application. [Figure 8] It is a partial front view of a core component according to some other embodiments of the present application. [Figure 9] It is a partial top view of the core component in Figure 8. [Figure 10] This is one of the schematic layout diagrams of flux barriers in some embodiments of the present application. [Figure 11] This is the second schematic layout diagram of flux barriers in some embodiments of the present application. [Figure 12] This is the third schematic layout diagram of flux barriers in some embodiments of the present application. [Mode for Carrying Out the Invention]

[0023] Hereinafter, the embodiments of the present application will be described in detail, and the exemplifications of the embodiments are shown in the accompanying drawings, wherein like or similar numerals always denote like or similar elements or elements having like or similar functions. The embodiments described below with reference to the accompanying drawings are illustrative, are only used for interpreting the present application, and should not be construed as limiting the present application.

[0024] In the description of the present application, orientation descriptions, for example, the orientations or positional relationships indicated by up, down, front, rear, left, right and the like, are the orientations or positional relationships shown based on the accompanying drawings, which are merely for the purpose of facilitating and simplifying the description of the present application, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0025] In the description of the present application, if there are references to "first" and "second", they are only for the purpose of distinguishing technical features, and should not be understood as indicating or implying relative importance, or implicitly indicating the number of the indicated technical features, or implicitly indicating the precedence of the indicated technical features.

[0026] In the description of the present application, unless otherwise clearly defined, terms such as arranged, mounted, and connected shall be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the above terms in the present application in combination with the specific content of the technical solution.

[0027] In related technologies, the stator of an outer rotor motor consists of a core and windings, with the windings attached to the core via an insulating frame. The core is generally made by rolling up a sheet of punched core material to obtain an annular core. When processing the punched core material, the material is manufactured with a structure in which the pole pieces of multiple cores are connected to each other, and the external insulating frames are independent of each other and can be individually attached and detached. Because the pole pieces of multiple cores are directly connected, the efficiency of electromagnetic energy conversion is relatively low, and the amount of magnetic flux leakage is relatively large, which affects the performance of the outer rotor motor.

[0028] Therefore, the embodiment of the first aspect of this application proposes a stator core assembly used in a motor that can effectively reduce magnetic flux leakage and improve the efficiency of electromagnetic energy conversion, which is advantageous for improving motor performance.

[0029] Referring to Figures 1 to 6, the stator core assembly according to the embodiment of this application includes a core component 100 and an insulating frame chain 200, the core component 100 includes a plurality of cores 110, the cores 110 are generally made of a soft magnetic material, generally silicon steel, and soft magnetic materials are materials that become magnetized when Hc is 1000 A / m or less, and are also called soft magnets. Soft magnetic materials can achieve maximum magnetization strength with the minimum external magnetic field and have low coercivity and high permeability. Soft magnetic materials are easily magnetized and demagnetized and are widely used in electrical and electronic equipment.

[0030] The core 110 includes a connected yoke portion 120, a teeth portion 130, and a pole piece portion 140, the yoke portion 120 and the pole piece portion 140 distributed at both ends of the teeth portion 130, and the pole piece portion 140 is positioned on both sides of the teeth portion 130 along the circumferential direction of the core component 100 (relative to the annular core component 100), and the pole piece portions 140 of two adjacent cores 110 are close together without contact. The stator windings are mounted on the outside of the teeth portion 130, and the pole piece portion 140 is used radially to restrict the windings and prevent displacement or detachment of the windings.

[0031] Referring to Figure 8, along the circumferential direction of the core component 100, a chuck 121 is installed on one side of the yoke portion 120, and a locking groove 122 is installed on the other side. When multiple cores 110 are combined as an annular core component 100, one chuck 121 of two adjacent cores 110 is locked into the other locking groove 122, and the yoke portions 120 of the multiple cores 110 are combined into an annular body, giving the core component 100 a stable structure and improving reliability in use.

[0032] The multiple cores 110 of the core component 100 are independent components, and the multiple cores 110 may be connected together via an insulating frame chain 200. Alternatively, the multiple cores 110 may be connected via a flux barrier, and the multiple cores 110 may be connected to the insulating frame chain 200. This will be described in detail below.

[0033] Referring to Figures 1 and 2, the insulating frame chain 200 includes a plurality of insulating frames 210 connected in sequence, where two adjacent insulating frames 210 are connected to each other to form the insulating frame chain 200. Two adjacent insulating frames 210 may be directly connected, or they may be connected via a connector.

[0034] Referring to Figures 5 and 6, the insulating frame 210 is provided with a through cavity 211, the shape of which matches the shape of the teeth portion 130, and the teeth portion 130 of the core 110 is provided in the through cavity 211, thereby fixing and connecting to the insulating frame 210. Considering that the winding wires are wound outside the insulating frame 210, the insulating frame 210 separates the core 110 from the winding wires, so the insulating frame 210 surrounds the core 110 and has pole piece baffles 212 and yoke baffles 213 at both ends of the through cavity 211, the pole piece baffle 212 abuts against the side of the pole piece portion 140 facing the yoke portion 120 and the yoke baffle 213 abuts against the side of the yoke portion 120 facing the pole piece portion 140, preventing the winding wires from coming into contact with the core 110 and avoiding a short circuit. The pole piece baffle 212 and the yoke baffle 213 further restrict the position of the teeth portion 130 in the through cavity 211, preventing displacement.

[0035] Referring to Figures 4 and 5, the insulating frame chain 200 is formed by combining a first frame chain 220 and a second frame chain 230, which are distributed on both axial sides of the core component 100, and each of the first frame chain 220 and the second frame chain 230 has a half groove, the two half grooves forming a through cavity 211. Cooperative buckles are installed on the opposing surfaces of the first frame chain 220 and the second frame chain 230, and they are connected via the buckles.

[0036] The insulating frame chain 200 may be a single part formed on the outside of the core component 100 by an integral injection molding overmolding process so as to enclose the multiple cores 110.

[0037] In some embodiments of this application, the stator core assembly consists of a core component 100 and an insulating frame chain 200. The multiple cores 110 of the core component 100 are independent of each other and are integrally connected via the insulating frame chain 200. The core component 100 does not require punching out a plate with connected pole pieces during production, and the pole piece portions 140 of the multiple cores 110 are separated, which is advantageous in reducing magnetic flux leakage, improving the efficiency of electromagnetic energy conversion, and improving the performance of the motor (especially the outer rotor motor). Furthermore, the teeth portions 130 of the core 110 are provided in the through-cavity 211 of the insulating frame 210. After the core component 100 is rolled and formed, the insulating frame chain 200 can improve the structural strength and durability of the stator core assembly.

[0038] The core 110 and the insulating frame 210 correspond one-to-one; that is, the core component 100 completely fills the mounting position of the insulating frame chain 200, and after assembly, there are no empty spaces on the insulating frame chain 200. Furthermore, the shape and cross-section of the through-cavity 211 of each insulating frame 210 are the same as those of the teeth portion 130. From a design perspective, a certain clearance may be pre-set in the through-cavity 211 to facilitate the assembly of the core 110.

[0039] Referring to Figures 1 to 5, two adjacent insulating frames 210 are connected via pole piece baffles 212 to form an insulating frame chain 200. Since rounding is required after assembling the core component 100 and the insulating frame chain 200, a relief groove 214 is formed between the pole piece baffles 212 of the two adjacent insulating frames 210. During the rounding process, the relief groove 214 is used to prevent interference between the pole piece baffles 212 of the two adjacent insulating frames 210, avoiding any impact on the molding of the stator core assembly and preventing deformation and twisting of the stator core assembly.

[0040] Referring to Figure 2, the relief groove 214 is sector-shaped and has an angle α, and the number of cores 110 in the core component 100 is x. The design requires that the product of α and x be equal to 360°, and when the stator core assembly is rounded into an annular shape and the pole piece baffles 212 of two adjacent insulating frames 210 come into contact, the insulating frame chain 200 also forms a complete annulus. On the other hand, considering manufacturing tolerances, the design requires that the product of α and x be greater than 360°, which is a more preferable approach as it ensures a certain gap, is advantageous for the rounding process of the stator core assembly, improves assembly efficiency, and reduces the manufacturing precision of the insulating frame chain 200, thus reducing costs.

[0041] As shown in Figure 5, side plates are installed on the edges of the pole piece baffles 212 of two adjacent insulating frames 210, and the two side plates are configured in an inverted V-shape to form a relief groove 214. The inverted V-shape improves connection strength, makes it less prone to breakage, is advantageous for deformation of the insulating frame chain 200, and improves durability.

[0042] Referring to Figures 1 and 2, deformation occurs in the pole piece baffle 212 during the process of rolling up the insulating frame chain 200. Therefore, a bending groove 215 is provided on the side of the pole piece baffle 212 away from the pole piece 140. Considering that the deformation of the pole piece baffle 212 expands in the circumferential direction, the bending groove 215 is positioned along the axial direction of the core component 100. During the process of rolling up the insulating frame chain 200, it is advantageous to utilize the expansion of the bending groove 215 to reduce the deformation of the pole piece baffle 212, thereby protecting the insulating frame chain 200 and reducing the risk of breakage. Considering that the position where the deformation of the insulating frame chain 200 is greatest when rolling up is the position where the relief groove 214 is located. Therefore, in the circumferential direction of the core component 100, two bending grooves 215 are provided at the position where each relief groove 214 is located, and one bending groove 215 is distributed on each side of the relief groove 214. By utilizing the two bending grooves 215 to distribute the amount of deformation, it is advantageous to reduce the deformation of the pole piece baffle 212, prevent breakage, and improve reliability.

[0043] Referring to Figures 7 and 8, the outer surface of the pole piece portion 140 is an arcuate surface, and the radius of curvature of the arcuate surface is r. As shown in Figure 2, the wall surface of the bent groove 215 is a cylindrical surface, and the radius of the cylindrical surface is set to 0.002r to 0.007r, but a radius of 0.005r for the cylindrical surface is a more preferable solution, and assuming the deformation is satisfied, the cross-sectional area of ​​the bent groove 215 is relatively suitable and easy to process.

[0044] Referring to FIG. 1 and FIG. 3, a hook angle is disposed at the edge of the yoke portion baffle, the hook angle extends toward the pole piece portion, the hook angle assists in limiting the winding, and is used to prevent the wire of the winding from moving and coming into contact with the core, so as to avoid the occurrence of a short circuit problem. One hook angle may be disposed on each of the two side edges of the yoke portion baffle, or a plurality of hook angles may be disposed on each of the two side edges of the yoke portion baffle. The hook angle can be manufactured by an integrated injection molding process, with low cost.

[0045] Referring to FIG. 7, the outer side surface of the pole piece portion is an arc surface, the radius of curvature of the arc surface is r, along the circumferential direction of the arc surface, the width of the inner side surface of the pole piece portion is c, the length of the insulating frame chain is L, and the number of cores in the core component is x. In terms of design, xc < L < 2xr*sin(180° / x) is satisfied, so that the length of the insulating frame chain is adapted to the rounded core component, which is sufficient to accommodate the core component and avoid the occurrence of excessive deformation.

[0046] Referring to Figures 4 and 5, the insulating frame chain 200 includes a first frame chain 220 and a second frame chain 230. The first frame chain 220 and the second frame chain 230 are combined as the insulating frame chain 200 and are positioned on both axial sides of the core component 100. The first frame chain 220 and the second frame chain 230 cooperate to clamp the core component 100. Structurally, dividing the insulating frame chain 200 into a first frame chain 220 and a second frame chain 230 is advantageous for processing and manufacturing and reduces the complexity of the injection molding die. Furthermore, compared to a structure in which multiple cores 110 are independent of each other, the segmented insulating frame chain 200 is advantageous for assembling the cores 110 one by one. The first frame chain 220 and the second frame chain 230 can be connected and fixed to each other via buckles or connectors that cooperate with each other. Furthermore, the stator windings can also limit and fix the first frame chain 220 and the second frame chain 230.

[0047] Referring to Figure 6, the first frame chain 220 and the second frame chain 230 sandwich the core component 100 from both sides, and a boss 231 is installed on the outer surface of the second frame chain 230 away from the core component 100. The boss 231 is used to secure the stator core assembly and to fit it into the winding machine in order to facilitate winding work.

[0048] Referring to Figures 8 and 9, in some embodiments, multiple cores 110 are arranged sequentially, and two adjacent cores 110 are connected via a flux barrier 300. The flux barrier 300 has a relatively low leakage flux saturation value, and by utilizing the low leakage flux saturation value of the flux barrier 300, the amount of magnetic flux leakage is limited, thereby achieving the objective of reducing magnetic flux leakage. The core 110 is made of multiple layers of soft magnetic material laminated together, and the soft magnetic material commonly used is silicon steel. In press forming of silicon steel sheets, the flux barrier 300 is pressed integrally to realize the sequential connection of multiple cores 110. Since the core 110 is made of multiple layers of silicon steel sheets laminated together, it is sufficient to install the flux barrier 300 on one or a few of the silicon steel sheets, which is advantageous for reducing magnetic flux leakage. For example, the flux barrier 300 is installed on the first and last layers of silicon steel sheets. Multiple cores 110 are connected in a chain-like structure, which may correspond to an insulating frame chain 200, thus facilitating assembly.

[0049] Two adjacent cores 110 are connected via a flux barrier 30, and since the core 110 has multiple layers of silicon steel sheets, there are multiple arrangements for the flux barrier 300. Considering the mutual effects of electromagnetic fields, it is more preferable that the two sets of adjacent flux barriers 300 are distributed on different layers of silicon steel sheets in the circumferential direction of the core component 100. Referring to Figure 9, the top view of the core component 100 shows that flux barriers 300 are not provided on all silicon steel sheets, but are selectively installed. As shown in Figure 10, the first set of flux barriers 300 are distributed on the odd-numbered first layer, the even-numbered first layer, the odd-numbered last layer, and the even-numbered last layer of the silicon steel sheet, and the second set of flux barriers 300 are distributed on the odd-numbered second layer, the even-numbered second layer, the odd-numbered second-to-last layer, and the even-numbered second-to-last layer of the silicon steel sheet, and so on. As shown in Figures 11 and 12, assuming that multiple cores 110 are connected, multiple sets of flux barriers 300 may be arranged in an X shape to achieve a relatively small amount of magnetic flux leakage.

[0050] Referring to Figure 8, the flux barrier 300 is located between the pole piece portions 140 of two adjacent cores 110, and a curved groove 301 is provided on the side of the flux barrier 300 facing the yoke portion 120. In the process of rounding the core component 100, the curved groove 301 is advantageous for the curvature deformation of the flux barrier 300, and it is preferable that the curvature radius of the curved groove 301 is 0.01r.

[0051] The stator core assembly according to the embodiment of the present invention has at least the following beneficial effects. Multiple cores of the core component are integrally connected via an insulating frame chain, which is advantageous in reducing the amount of magnetic flux leakage between the pole piece portions of the multiple cores, improving the efficiency of electromagnetic energy conversion and improving motor performance. In addition, the teeth portion of the core is provided in the through cavity of the insulating frame, and after the core component is rolled and formed, the insulating frame chain can improve the structural strength and durability of the stator core assembly.

[0052] A stator (not shown) according to a second embodiment of the present application includes the stator core assembly and windings of the above embodiment, the stator core assembly includes a core component 100 and an insulating frame chain 200, the core component 100 includes a plurality of cores 110, each core 110 includes a connected yoke portion 120, a teeth portion 130, and a pole piece portion 140, the yoke portion 120 and the pole piece portion 140 distributed at both ends of the teeth portion 130, the pole piece portion 140 is arranged on both sides of the teeth portion 130 along the circumferential direction of the core component 100 (relative to the annular core component 100), and the pole piece portions 140 of two adjacent cores 110 are close together but not in contact. The windings are fitted outside the teeth portion 130 and the pole piece portion 140 is used radially to restrict the windings and prevent displacement or detachment of the windings.

[0053] Referring to Figure 8, along the circumferential direction of the core component 100, a chuck 121 is installed on one side of the yoke portion 120, and a locking groove 122 is installed on the other side. When multiple cores 110 are combined as an annular core component 100, one chuck 121 of two adjacent cores 110 is locked into the other locking groove 122, and the yoke portions 120 of the multiple cores 110 are combined into an annular body, giving the core component 100 a stable structure and improving reliability in use.

[0054] The multiple cores 110 of the core component 100 are independent components, and the multiple cores 110 may be connected together via an insulating frame chain 200, or the multiple cores 110 may be connected via a flux barrier.

[0055] Referring to Figures 1 and 2, the insulating frame chain 200 includes a plurality of insulating frames 210 connected in sequence, where two adjacent insulating frames 210 are connected to each other to form the insulating frame chain 200, and the two insulating frames 210 may be directly connected or connected via a connector.

[0056] Referring to Figures 5 and 6, the insulating frame 210 is provided with a through cavity 211, the shape of which matches the shape of the teeth portion 130, and the teeth portion 130 of the core 110 is provided in the through cavity 211, thereby fixing and connecting to the insulating frame 210. Considering that the winding wires are wound outside the insulating frame 210, the insulating frame 210 separates the core 110 from the winding wires, so the insulating frame 210 surrounds the core 110 and has pole piece baffles 212 and yoke baffles 213 at both ends of the through cavity 211, the pole piece baffle 212 abuts against the side of the pole piece portion 140 facing the yoke portion 120 and the yoke baffle 213 abuts against the side of the yoke portion 120 facing the pole piece portion 140, preventing the winding wires from coming into contact with the core 110 and avoiding a short circuit. The pole piece baffle 212 and the yoke baffle 213 simultaneously limit the position of the teeth portion 130 in the through cavity 211, preventing displacement.

[0057] The stator core assembly consists of a core component 100 and an insulating frame chain 200. Multiple cores 110 of the core component 100 are integrally connected via the insulating frame chain 200, which is advantageous in reducing magnetic flux leakage between the pole piece portions 140 of the multiple cores 110, improving the electromagnetic energy conversion efficiency of the stator and enhancing the performance of the motor (especially the outer rotor motor). Furthermore, the teeth portions 130 of the cores 110 are provided in the through-cavity 211 of the insulating frame 210. After the core component 100 is rolled and formed, the insulating frame chain 200 can improve the structural strength and durability of the stator core assembly.

[0058] A motor according to an embodiment of the third aspect of this application includes the stator of the above embodiment and has all the technical effects of the stator, and its description is omitted.

[0059] Although embodiments of this application have been described in detail above with reference to the attached drawings, this application is not limited to the above embodiments, and various modifications may be made within the scope of the knowledge of a person skilled in the art without departing from the spirit of this application. [Explanation of Symbols]

[0060] Core component 100, core 110, yoke section 120, chuck 121, locking groove 122, teeth section 130, pole piece section 140, insulating frame chain 200, insulating frame 210, through cavity 211, pole piece section baffle 212, yoke section baffle 213, relief groove 214, bent groove 215, hook angle 216, first frame chain 220, second frame chain 230, boss 231, flux barrier 300, curved groove 301.

Claims

1. A core component containing multiple cores, Includes an insulating frame chain which includes multiple insulating frames connected in sequence, The core includes a connected yoke portion, a teeth portion, and a pole piece portion. The pole piece portion is positioned at the end of the tooth portion that is away from the yoke portion. The aforementioned insulating frame is provided with a through cavity. The teeth portion is provided within the through cavity, The aforementioned insulating frame is equipped with a pole piece baffle. A stator core assembly wherein a bent groove is provided on the side of the pole piece baffle that is away from the pole piece portion, and the groove is arranged along the axial direction of the core component.

2. The stator core assembly according to claim 1, wherein the core and the insulating frame correspond to each other in a one-to-one relationship.

3. The pole piece baffle abuts against the side surface of the pole piece facing the yoke portion, The stator core assembly according to claim 1 or 2, wherein a relief groove is formed between the pole piece baffles of two adjacent insulating frames.

4. The stator core assembly according to claim 3, wherein the relief groove is sector-shaped and has an angle of α, the number of cores is x, and the product of α and x is 360° or more.

5. The stator core assembly according to claim 3, wherein one of the bending grooves is distributed on each side of the relief groove in the circumferential direction of the core component.

6. The stator core assembly according to claim 5, wherein the outer surface of the pole piece portion is an arcuate surface, and the radius of curvature of the arcuate surface is r, and the wall surface of the bent groove is a cylindrical surface, and the radius of the cylindrical surface is 0.002r to 0.007r.

7. The aforementioned insulating frame is equipped with a yoke baffle. The yoke baffle abuts against the yoke, A hook angle is provided on the edge of the yoke baffle. The stator core assembly according to claim 1, wherein the hook angle extends toward the pole piece portion.

8. The stator core assembly according to claim 1, wherein the outer surface of the pole piece is an arcuate surface, the radius of curvature of the arcuate surface is r, the width of the inner surface of the pole piece is c along the circumferential direction of the arcuate surface, the length of the insulating frame chain is L, the number of cores is x, and xc < L < 2xr * sin(180° / x).

9. The insulating frame chain includes a first frame chain and a second frame chain. The stator core assembly according to claim 1, wherein the first frame chain and the second frame chain are combined as an insulating frame chain and are arranged on both axial sides of the core component.

10. The aforementioned insulating frame chain has a one-piece structure, The stator core assembly according to claim 1, wherein the insulating frame chain and the core component are integrally molded by an overmolding process.

11. The multiple cores of the aforementioned core component are independent of each other. The stator core assembly according to claim 1, wherein the plurality of cores are connected via the insulating frame chain.

12. The stator core assembly according to claim 1, wherein the plurality of cores are arranged in sequence, and two adjacent cores are connected via a flux barrier.

13. The aforementioned core has a laminated structure of multiple layers of silicon steel sheets. The stator core assembly according to claim 12, wherein the flux barrier connects one of the silicon steel sheets of two adjacent core components, and the layers in which the two adjacent sets of flux barriers are located are different in the circumferential direction of the core component.

14. The stator core assembly according to claim 12 or 13, wherein the flux barrier is located between the pole piece portions of two adjacent cores, and a curved groove is provided on the side surface of the flux barrier facing the yoke portion.

15. A stator comprising the stator core assembly described in claim 1.

16. A motor including the stator described in claim 15.

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