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] This application claims priority to a Chinese patent application filed on November 14, 2022, bearing application number 202211421241.4 and entitled "Stator Core Assembly, Stator and Motor," the entire contents of which are incorporated herein by reference.

[0002] The present application relates to the field of motor technology, and more particularly to a stator core assembly, a stator, and a motor. [Background technology]

[0003] In the related art, motor manufacturing requires rolling a rod-shaped core to obtain a ring-shaped core, which is then subjected to the next manufacturing step. In the conventional rod-shaped core structure, when a core punching plate is processed, the core punching plate is manufactured as a structure in which multiple core pole pieces are connected to each other, and the external insulating frames are independent of each other and can be individually attached and detached. In this structure, the multiple core pole pieces are directly connected, which results in relatively low electromagnetic energy conversion efficiency and affects the performance of the outer rotor motor. Summary of the Invention [Problem 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, and therefore proposes a stator core assembly, a stator using the stator core assembly, and a motor using the stator. [Means for solving the problem]

[0005] According to an embodiment of the first aspect of the present application, a stator core assembly includes a core part and an insulating frame chain, the core part including a plurality of cores, the insulating frame chain including a plurality of insulating frames connected in sequence, wherein the cores include connected yoke parts, teeth parts, and pole piece parts, the pole piece parts being arranged at ends of the teeth parts remote from the yoke parts, a through cavity being provided in the insulating frame, and the teeth parts being provided within the through cavity.

[0006] According to some embodiments of the present application, the core and the insulating frame have a one-to-one correspondence.

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

[0008] According to some embodiments of the present application, the relief groove is fan-shaped, and has an included angle of α, the number of the cores is x, and the product of α and x is greater than or equal to 360°.

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

[0010] According to some embodiments of the present application, the outer surface of the pole piece portion is an arcuate surface, and the radius of curvature of the arcuate surface is r; the wall surface of the curved 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 installed on the insulating frame. The yoke portion baffle abuts against the yoke portion, and a hook angle is installed at an edge of the yoke portion baffle. The hook angle extends toward the pole piece portion.

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

[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 as the insulating frame chain and are arranged 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 formed 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 is 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 a circumferential direction of the core component, 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 of the flux barrier facing the yoke portion.

[0019] According to an embodiment of the second aspect of the present application, a stator includes the stator core assembly according to the embodiment of the first aspect.

[0020] According to a motor according to an embodiment of the third aspect of the present application, the motor includes the stator according to the embodiment of the second aspect.

[0021] Additional aspects and advantages of the present application will be set forth in part in the description that follows, and in part will be obvious 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 easier to understand in the following description of the embodiments taken in conjunction with the accompanying drawings. [Brief explanation of the drawings]

[0022] [Figure 1] FIG. 2 is a front view of a stator core assembly in an extended state according to some embodiments of the present application. [Figure 2] FIG. 2 is a local enlarged view of part A in FIG. [Figure 3] FIG. 2 is a local enlarged view of part B in FIG. [Figure 4] FIG. 2 is an exploded schematic view of a stator core assembly according to some embodiments of the present application. [Figure 5] FIG. 5 is a local enlarged view of part C in FIG. 4. [Figure 6] FIG. 2 is a schematic diagram of a local structure of a stator core assembly according to some embodiments of the present application. [Figure 7] 1 is a cross-sectional view of a core component according to some embodiments of the present application. [Figure 8] FIG. 10 is a local front view of a core component according to some other embodiments of the present application. [Figure 9] FIG. 9 is a local top view of the core part in FIG. 8. [Figure 10] 1 is a schematic diagram of a flux barrier arrangement according to some embodiments of the present application. [Figure 11] 2 is a second schematic diagram of the arrangement of flux barriers in some embodiments of the present application. [Figure 12] 3 is a third schematic diagram of the arrangement of flux barriers in some embodiments of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0023] Hereinafter, the embodiments of the present application will be described in detail, and examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals always represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are illustrative and are only used to interpret the present application, and should not be understood as limiting the present application.

[0024] In the description of this application, orientations or positional relationships indicated by, for example, up, down, front, back, left, right, etc. are orientations or positional relationships shown based on the accompanying drawings, and are intended merely to facilitate and simplify the description of this application, and do not indicate or imply that the indicated devices or elements must have a particular orientation or be configured or operated in a particular orientation, and therefore should not be understood as limiting this application.

[0025] In the description of this application, if there is a first or second description, it is 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 context of the indicated technical features.

[0026] In the description of this application, unless otherwise expressly limited, terms such as installation, mounting, connection, etc. should be understood in a broad sense, and a person skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0027] In related art, the stator of an outer rotor motor consists of a core and a winding, and the winding is attached to the core via an insulating frame. The core is generally made by rolling a sheet-shaped core punching plate to obtain an annular core. When processing the core punching plate, the core punching plate is manufactured as a structure in which multiple core pole pieces are connected to each other, and its external insulating frame is independent from each other and can be individually attached and detached. Because the multiple core pole pieces 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, an embodiment of the first aspect of the present application proposes a stator core assembly for use in a motor, which can effectively reduce magnetic flux leakage and improve the efficiency of electromagnetic energy conversion, which is advantageous for improving the performance of the motor.

[0029] 1 to 6, a stator core assembly according to an embodiment of the present 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 typically made of a soft magnetic material, typically silicon steel. A soft magnetic material is a material that generates magnetization when Hc is 1000 A / m or less, and is also called a soft magnetic body. A soft magnetic material can achieve maximum magnetization strength with a minimal external magnetic field, and has low coercivity and high magnetic permeability. Soft magnetic materials are easily magnetized and demagnetized, and are widely used in electrical and electronic equipment.

[0030] The core 110 includes a yoke portion 120, a teeth portion 130, and a pole piece portion 140 that are connected to each other, and the yoke portion 120 and the pole piece portion 140 are distributed on both ends of the teeth portion 130. The pole piece portions 140 are arranged on both sides of the teeth portion 130 along the circumferential direction of the core part 100 (with respect to the annular core part 100), and the pole piece portions 140 of two adjacent cores 110 are close to each other but do not contact each other. The stator windings are attached to the outside of the teeth portion 130, and the pole piece portions 140 are used to confine the windings in the radial direction, preventing them from shifting or coming off.

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

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

[0033] 1 and 2, an insulation frame chain 200 includes a plurality of insulation frames 210 connected in series, and two adjacent insulation frames 210 are connected to each other to form the insulation frame chain 200. Two adjacent insulation frames 210 may be directly connected, or two adjacent insulation frames 210 may be connected via a connecting part.

[0034] 5 and 6, the insulating frame 210 is provided with a through cavity 211, the shape of which matches the shape of the teeth 130, and the teeth 130 of the core 110 are provided in the through cavity 211 and thereby fixedly connected 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 a pole piece portion baffle 212 and a yoke portion baffle 213 at both ends of the through cavity 211. The pole piece portion baffle 212 abuts against the side of the pole piece portion 140 facing the yoke portion 120, and the yoke portion baffle 213 abuts against the side of the yoke portion 120 facing the pole piece portion 140, preventing the winding wires from contacting the core 110 and avoiding a short circuit. The pole piece baffle 212 and the yoke baffle 213 further limit the position of the teeth 130 in the through cavity 211 and prevent displacement.

[0035] 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 part 100. The first frame chain 220 and the second frame chain 230 each have a half groove, and the two half grooves form 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 piece molded on the outside of the core part 100 by an overmolding process of integral injection molding so as to encase the multiple cores 110 .

[0037] In some embodiments of the present application, the stator core assembly comprises a core component 100 and an insulating frame chain 200. The core components 100 each have a plurality of cores 110 that are independent of one another and connected together via the insulating frame chain 200. This eliminates the need to punch out a punching plate with connected pole pieces during production of the core component 100. The pole piece portions 140 of the cores 110 are separated, which is advantageous for reducing magnetic flux leakage, improving electromagnetic energy conversion efficiency, and improving motor (especially outer rotor motor) performance. Furthermore, the teeth 130 of the cores 110 are provided in the through cavities 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 have a one-to-one correspondence, i.e., the core part 100 fills the entire mounting position of the insulating frame chain 200, and there are no empty slots on the insulating frame chain 200 after assembly. Furthermore, the shape and cross section of the through-cavity 211 of each insulating frame 210 are the same as those of the tooth part 130. In terms of design, the through-cavity 211 may be preset with a certain clearance gap to facilitate assembly of the core 110.

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

[0040] 2, the relief groove 214 is sector-shaped with an included angle of α, the number of cores 110 in the core part 100 is x, and the design requires that the product of α and x be equal to 360°, so that when the stator core assembly is rolled into a ring and the pole piece baffles 212 of two adjacent insulation frames 210 abut against each other, the insulation frame chain 200 also forms a complete ring. However, considering manufacturing errors, it is more preferable to design the product of α and x to be greater than 360°, as this ensures a certain gap, which is beneficial for the rolling process of the stator core assembly, improves assembly efficiency, and reduces the manufacturing precision and costs of the insulation frame chain 200.

[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 likely to break, and is advantageous for preventing deformation of the insulating frame chain 200, improving durability.

[0042] 1 and 2, during the rolling process of the insulation frame chain 200, deformation also occurs in the pole piece portion baffles 212. Therefore, bending grooves 215 are provided on the side of the pole piece portion baffles 212 away from the pole piece portion 140. Considering that the deformation of the pole piece portion baffles 212 expands in the circumferential direction, the bending grooves 215 are provided along the axial direction of the core part 100. During the rolling process of the insulation frame chain 200, the expansion of the bending grooves 215 is utilized to reduce the deformation of the pole piece portion baffles 212, which is advantageous for protecting the insulation frame chain 200 and reducing the risk of breakage. Considering that the positions where the deformation of the insulation frame chain 200 is greatest during rolling are the positions where the relief grooves 214 are located, two bending grooves 215 are provided at the positions where each relief groove 214 is located in the circumferential direction of the core part 100, 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 possible to reduce the deformation of the pole piece baffle 212, prevent breakage, and improve reliability.

[0043] 7 and 8, the outer surface of the pole piece part 140 is an arcuate surface, and the radius of curvature of the arcuate surface is r. As shown in FIG. 2, the wall surface of the curved groove 215 is a cylindrical surface, and the radius of the cylindrical surface is set to 0.002r to 0.007r, among which, a more preferable method is to set the radius of the cylindrical surface to 0.005r. On the premise that deformation is satisfied, the cross-sectional area of ​​the curved groove 215 is relatively suitable and is easy to process.

[0044] Referring to FIGS. 1 and 3, hook corners 216 are provided at the edges of the yoke portion baffle 213. The hook corners 216 extend toward the pole piece portion 140. The hook corners 216 assist in limiting the winding, prevent the wires of the winding from moving and contacting the core 110, and are used to prevent the occurrence of a short - circuit problem. The hook corners 216 may be arranged one on each of the two side edges of the yoke portion baffle 213, or may be arranged in plural on each of the two side edges of the yoke portion baffle 213. The hook corners 216 can be manufactured by an integral injection molding process, and the cost is low.

[0045] Referring to FIG. 7, the outer surface of the pole piece portion 140 is an arc surface, and the radius of curvature of the arc surface is r. Along the circumferential direction of the arc surface, the width of the inner surface of the pole piece portion 140 is c, the length of the insulating frame chain 200 is L, the number of cores 110 in the core component 100 is x, and designed to satisfy xc < L < 2xr*sin(180° / x), the length of the insulating frame chain 200 is adapted to the rounded core component 100, which is sufficient to accommodate the core component 100 and avoid the occurrence of excessive deformation.

[0046] 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 arranged on both axial sides of the core component 100, and the first frame chain 220 and the second frame chain 230 cooperate to hold the core component 100. Structurally, dividing the insulating frame chain 200 into the first frame chain 220 and the second frame chain 230 is advantageous for processing and manufacturing, reducing the complexity of the injection molding mold. Furthermore, compared to a structure in which multiple cores 110 are independent of each other, the split 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 through mutually cooperating buckles or connectors, and the stator windings can also define the first frame chain 220 and the second frame chain 230 and perform the fixing function.

[0047] Referring to FIG. 6, the first frame chain 220 and the second frame chain 230 sandwich the core part 100 from both sides, and a boss 231 is provided on the outer surface of the second frame chain 230 away from the core part 100. The boss 231 is used to fix the stator core assembly and to be fitted into a winding machine to facilitate the winding work.

[0048] 8 and 9 , in some embodiments, multiple cores 110 are arranged in sequence, with adjacent cores 110 connected via a flux barrier 300. The flux barriers 300 have a relatively low leakage flux saturation value, and the low leakage flux saturation value of the flux barriers 300 is used to limit and reduce magnetic flux leakage. The cores 110 are formed by laminating multiple layers of soft magnetic material, with silicon steel being a commonly used soft magnetic material. During press forming of the silicon steel sheet, the flux barriers 300 are integrally pressed to achieve the sequential connection of the multiple cores 110. Because the core 110 is formed by laminating multiple layers of silicon steel sheet, it is only necessary to install flux barriers 300 on one or a few of the silicon steel sheet layers, which is advantageous for reducing magnetic flux leakage. For example, the flux barriers 300 are installed on the first and last silicon steel sheet layers. A plurality of cores 110 are connected in a chain-like structure, which may correspond to the insulating frame chain 200, for ease of assembly.

[0049] Two adjacent cores 110 are connected via a flux barrier 30. Because the core 110 has multiple layers of silicon steel sheets, there are multiple ways to arrange the flux barriers 300. Considering the mutual influence of electromagnetic fields, it is more preferable that two adjacent sets of flux barriers 300 are distributed on different layers of silicon steel sheets in the circumferential direction of the core component 100. Referring to FIG. 9 , a top view of the core component 100 shows that not all silicon steel sheets are provided with flux barriers 300, but rather that they are selectively installed. As shown in FIG. 10 , a first set of flux barriers 300 is distributed on the first odd-numbered layer, the first even-numbered layer, the last odd-numbered layer, and the last even-numbered layer of the silicon steel sheets. A second set of flux barriers 300 is distributed on the second odd-numbered layer, the second even-numbered layer, the second-last odd-numbered layer, and the second-last even-numbered layer of the silicon steel sheets, and this pattern is repeated. 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 rolling the core part 100, the curved groove 301 is advantageous for the curved deformation of the flux barrier 300, and it is preferable that the curved 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: The cores of the core component are connected together via an insulating frame chain, which is advantageous for reducing magnetic flux leakage between the pole piece portions of the cores, improving the efficiency of electromagnetic energy conversion, and enhancing motor performance. Furthermore, the teeth of the cores are provided in the through cavities of the insulating frame, and after the core components are 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 an embodiment of the second aspect of the present application includes the stator core assembly and windings of the above-described embodiment, the stator core assembly including a core part 100 and an insulating frame chain 200, the core part 100 including a plurality of cores 110, the cores 110 including connected yoke parts 120, teeth parts 130, and pole piece parts 140, the yoke parts 120 and pole piece parts 140 being distributed on both ends of the teeth part 130, the pole piece parts 140 being arranged on both sides of the teeth part 130 along the circumferential direction of the core part 100 (with respect to the annular core part 100), the pole piece parts 140 of two adjacent cores 110 being adjacent to each other but not in contact with each other. The windings are fitted around the outside of the teeth parts 130, and the pole piece parts 140 are used to confine the windings in the radial direction to prevent the windings from shifting or coming off.

[0053] Referring to FIG. 8, a chuck 121 is installed on one side of the yoke portion 120 along the circumferential direction of the core part 100, and a locking groove 122 is installed on the other side. When multiple cores 110 are combined into an annular core part 100, the chuck 121 of one of two adjacent cores 110 is locked into another locking groove 122, and the yoke portions 120 of the multiple cores 110 are combined into an annular body, giving the core part 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 insulation frame chain 200 includes a plurality of insulation frames 210 connected in sequence, and two adjacent insulation frames 210 are connected to each other to form the insulation frame chain 200. The two insulation frames 210 may be directly connected, or the two insulation frames 210 may be connected via a connecting part.

[0056] 5 and 6, the insulating frame 210 is provided with a through cavity 211, the shape of which matches the shape of the teeth 130, and the teeth 130 of the core 110 are provided in the through cavity 211 and thereby fixedly connected 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 that the insulating frame 210 surrounds the core 110 and has a pole piece portion baffle 212 and a yoke portion baffle 213 at both ends of the through cavity 211. The pole piece portion baffle 212 abuts against the side of the pole piece portion 140 facing the yoke portion 120, and the yoke portion baffle 213 abuts against the side of the yoke portion 120 facing the pole piece portion 140, preventing the winding wires from contacting 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 130 in the through cavity 211 and prevent displacement.

[0057] The stator core assembly comprises a core part 100 and an insulating frame chain 200, and the multiple cores 110 of the core part 100 are connected together via the insulating frame chain 200, which is advantageous for reducing the amount of magnetic flux leakage between the pole piece portions 140 of the multiple cores 110, improving the electromagnetic energy conversion efficiency of the stator, and improving the performance of the motor (especially an outer rotor motor). In addition, the teeth portions 130 of the cores 110 are provided in the through cavities 211 of the insulating frame 210, and after the core part 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 the present application includes the stator of the above embodiment and has all the technical effects of the stator, so a description thereof will be omitted.

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

[0060] Core part 100, core 110, yoke part 120, chuck 121, locking groove 122, teeth part 130, pole piece part 140, insulating frame chain 200, insulating frame 210, through cavity 211, pole piece part baffle 212, yoke part baffle 213, escape 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 including a plurality of cores; an insulating frame chain including a plurality of insulating frames connected in sequence; the core includes a yoke portion, a teeth portion, and a pole piece portion to be connected, the pole piece portion is disposed at an end of the teeth portion away from the yoke portion, The insulating frame has a through cavity formed therein; The teeth portion is provided within the through cavity.

2. The stator core assembly according to claim 1 , wherein the core and the insulating frame have a one-to-one correspondence.

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

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

5. A bending groove is provided on a side surface of the pole piece portion baffle away from the pole piece portion, 5. The stator core assembly according to claim 3, wherein the bent grooves are arranged along the axial direction of the core part, and one bent groove is distributed on each side of the relief groove in the circumferential direction of the core part.

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

7. A yoke baffle is installed on the insulating frame, the yoke baffle abuts against the yoke, The edge of the yoke baffle is provided with a hook angle, The stator core assembly according to claim 3 , wherein the hook angle extends toward the pole piece portion.

8. 8. The stator core assembly according to claim 1, wherein an outer surface of the pole piece portion is an arcuate surface, and a radius of curvature of the arcuate surface is r, a width of an inner surface of the pole piece portion along a circumferential direction of the arcuate surface is c, a length of the insulating frame chain is L, and the number of cores is x, satisfying 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 the insulating frame chain and are arranged on both axial sides of the core part.

10. The insulating frame chain has an integral structure, The stator core assembly according to claim 1 , wherein the insulating frame chain and the core part are integrally molded by an overmolding process.

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

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

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

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

15. A stator comprising a stator core assembly according to any one of claims 1 to 14.

16. A motor comprising the stator of claim 15.

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