Stator core assembly, stator and motor

Abstract

The present invention discloses a stator core assembly, a stator, and a motor, wherein the stator core assembly includes a core component and a plurality of independent insulating frames, the core component includes a plurality of cores arranged in sequence, two adjacent cores are connected by a magnetic isolation bridge, and the insulating frames correspond to the cores one by one; wherein the core includes a connected yoke, a tooth portion, and a boot portion, the yoke and the boot portion are arranged at both ends of the tooth portion, the insulating frame is provided with a through-hole, and the tooth portion is installed in the through-hole. The plurality of cores of the core component are connected in sequence by magnetic isolation bridges, and the magnetic isolation bridges are used to reduce the amount of magnetic leakage, which is beneficial to improving the efficiency of electromagnetic energy conversion and improving the performance of the motor; moreover, the teeth of the core are installed in the through-hole of the insulating frame, and each independent insulating frame is fixed to the core component, so the structure is stable and reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a stator core assembly, a stator and a motor. Background Art

[0002] In the related art, during the motor manufacturing process, the bar core needs to be rounded to obtain a ring-shaped iron core for the next manufacturing process. The traditional bar core structure, when punching the core sheets, is manufactured into a structure in which the pole shoes of multiple cores are directly connected. In this structure, the pole shoes of multiple cores are directly connected, resulting in high magnetic leakage, resulting in low electromagnetic energy conversion efficiency, affecting the performance of the outer rotor motor. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a stator core assembly that can effectively improve the efficiency of electromagnetic energy conversion.

[0004] The present invention also proposes a stator using the stator core assembly.

[0005] The present invention also provides a motor using the stator.

[0006] According to an embodiment of the first aspect of the present invention, the stator core assembly includes a core component and a plurality of independent insulating frames, wherein the core component includes a plurality of cores arranged in sequence, two adjacent cores are connected by a magnetic isolation bridge, and the insulating frames correspond to the cores one by one; wherein the core includes a connected yoke, a tooth and a boot, the yoke and the boot are arranged at both ends of the tooth, the insulating frame is provided with a through-hole, and the tooth is installed in the through-hole.

[0007] The stator core assembly according to the embodiment of the first aspect of the present invention has at least the following beneficial effects: the multiple cores of the core components are connected in sequence through magnetic isolation bridges, and the magnetic isolation bridges are used to reduce the amount of magnetic leakage, which is beneficial to improving the efficiency of electromagnetic energy conversion and improving the performance of the motor; moreover, the teeth of the core are installed in the through-cavity of the insulating frame, and each independent insulating frame is fixed to the core component, so the structure is stable and reliable.

[0008] According to some embodiments of the first aspect of the present invention, the iron core is a multi-layer silicon steel sheet laminated structure, the magnetic isolation bridge connects at least one layer of the silicon steel sheet of two adjacent iron core components, and along the circumference of the iron core component, the two adjacent groups of magnetic isolation bridges are at different levels.

[0009] According to some embodiments of the first aspect of the present invention, the magnetic isolation bridge is located between the boots of two adjacent cores, and a first curved groove is provided on a side of the magnetic isolation bridge facing the yoke.

[0010] According to some embodiments of the first aspect of the present invention, a second curved groove is provided on the side of the magnetic isolation bridge facing away from the yoke, and along the radial direction of the core component, the depth of the second curved groove is smaller than the depth of the first curved groove.

[0011] According to some embodiments of the first aspect of the present invention, along the circumference of the core component, a clamping strip is provided on one side of the yoke, and a clamping groove that cooperates with the clamping strip is provided on the other side.

[0012] According to some embodiments of the first aspect of the present invention, the insulating frame is provided with a boot baffle and a yoke baffle, the boot baffle abuts against the side of the boot facing the yoke, and the yoke baffle abuts against the side of the yoke facing the boot.

[0013] According to some embodiments of the first aspect of the present invention, an edge of the yoke baffle is provided with a hook, and the hook extends toward the boot.

[0014] According to some embodiments of the first aspect of the present invention, the outer side surface of the boot is a circular arc surface and the curvature radius of the circular arc surface is r, along the circumference of the circular arc surface, the width of the inner side surface of the boot is c, the length of the core component is L, and the number of the cores is x, satisfying: xc<L<2xr*sin(180° / x).

[0015] According to some embodiments of the first aspect of the present invention, the plurality of cores of the core component are connected end to end to form a ring structure.

[0016] According to some embodiments of the first aspect of the present invention, the insulating frame includes a first frame and a second frame, and the first frame and the second frame are assembled into the insulating frame and arranged on both axial sides of the iron core.

[0017] According to some embodiments of the first aspect of the present invention, the insulating frame is an injection-molded part, and the insulating frame is installed outside the iron core.

[0018] A stator according to an embodiment of the second aspect of the present invention includes the stator core assembly as described in the embodiment of the first aspect.

[0019] The motor according to the third embodiment of the present invention includes the stator as described in the second embodiment.

[0020] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Additional aspects and advantages of the present invention will become apparent and readily understood from the following description of embodiments with reference to the accompanying drawings, in which:

[0022] Figure 1 A top view of a stator core assembly according to an embodiment of the first aspect of the present invention;

[0023] Figure 2 for Figure 1 A partial enlarged view of point A in the middle;

[0024] Figure 3 A partial front view of the core component in the embodiment of the first aspect of the present invention;

[0025] Figure 4 for Figure 3 A partial top view of the middle core component;

[0026] Figure 5 Schematic diagram of the arrangement of the magnetic isolation bridge in the embodiment of the first aspect of the present invention Figure 1 ;

[0027] Figure 6 Schematic diagram of the arrangement of the magnetic isolation bridge in the embodiment of the first aspect of the present invention Figure 2 ;

[0028] Figure 7 Schematic diagram of the arrangement of the magnetic isolation bridge in the embodiment of the first aspect of the present invention Figure 3 ;

[0029] Figure 8 A front view of an insulating frame in an embodiment of the first aspect of the present invention;

[0030] Figure 9 2 is a cross-sectional view of the core component in the embodiment of the first aspect of the present invention.

[0031] The accompanying figures are as follows:

[0032] Core component 100, core 110, yoke 120, clamping bar 121, clamping groove 122, tooth portion 130, shoe portion 140;

[0033] Insulation frame 200, penetration cavity 211, boot baffle 212, yoke baffle 213, hook 214, bending groove 215, boss 216;

[0034] Magnetic isolation bridge 300 , first curved slot 301 , second curved slot 302 . DETAILED DESCRIPTION

[0035] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout 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 exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0036] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0037] In the description of the present invention, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0038] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0039] In the related art, the stator of an outer rotor motor consists of an iron core and windings, with the windings mounted on the iron core via an insulating frame. The iron core is typically formed by bending sheet-like iron core punchings into a circular shape to obtain a ring-shaped iron core. During the processing of the iron core punchings, the iron core punchings are manufactured into a structure in which the pole shoes of multiple iron cores are interconnected. The pole shoes of any two adjacent iron cores are completely connected, and all adjacent iron cores in each layer of iron core punchings have a connected structure. Since the pole shoes of multiple iron cores are directly connected, the efficiency of electromagnetic energy conversion is low, the amount of magnetic leakage is large, and the performance of the outer rotor motor is affected.

[0040] To this end, an embodiment of the first aspect of the present invention proposes a stator core assembly for use in a motor, which can effectively reduce magnetic leakage, improve the efficiency of electromagnetic energy conversion, and help improve the performance of the motor.

[0041] Reference Figures 1 to 3 The stator core assembly proposed in the embodiment of the first aspect of the present invention includes a core component 100 and a plurality of insulating frames 200, each insulating frame 200 is an independent component, the core component 100 includes a plurality of cores 110, the number of insulating frames 200 and cores 110 is equal, and one insulating frame 200 is installed on each core 110. The core 110 is usually made of soft magnetic material, usually silicon steel. Soft magnetic material is a material when magnetization occurs at Hc not greater than 1000A / m, also known as soft magnet. Soft magnetic material can achieve maximum magnetization intensity with minimum external magnetic field, and has low coercive force and high magnetic permeability. Soft magnetic material is easy to magnetize and easy to demagnetize, and is widely used in electrical and electronic equipment.

[0042] It is understood that the core 110 includes a connected yoke 120, a tooth 130, and a shoe 140. The yoke 120 and shoe 140 are located at both ends of the tooth 130. Along the circumference of the core component 100 (for an annular core component 100), the shoe 140 is arranged on both sides of the tooth 130. The stator winding is sheathed outside the tooth 130, and the shoe 140 radially defines the winding to prevent displacement or separation.

[0043] Reference Figure 3 Along the circumference of the core component 100, a clamping strip 121 is provided on one side of the yoke 120, and a clamping groove 122 is provided on the other side. When multiple cores 110 are assembled into a ring-shaped core component 100, the clamping strip 121 of one of the two adjacent cores 110 is inserted into the clamping groove 122 of the other, and the yokes 120 of the multiple cores 110 are combined into a ring body, so that the core component 100 has a stable structure and improves its reliability.

[0044] Reference Figure 3 and Figure 9 , multiple iron cores 110 are arranged in sequence, and two adjacent iron cores 110 are connected by a magnetic isolation bridge 300. The leakage flux saturation value of the magnetic isolation bridge 300 is low. The low saturation value of the leakage flux of the magnetic isolation bridge 300 is used to limit the leakage flux, thereby achieving the purpose of reducing the leakage flux. It should be understood that the iron core 110 is formed by stacking multiple layers of soft material. The soft material usually used is silicon steel sheet. The magnetic isolation bridge 300 is punched out as a whole during the stamping process of the silicon steel sheet, so that multiple iron cores 110 can be connected in sequence. Since the iron core 110 is stacked by multiple layers of silicon steel sheets, the magnetic isolation bridge 300 can be set in one layer or a few layers of silicon steel sheets, which is conducive to reducing the leakage flux. For example, the first and last layers of silicon steel sheets can be provided with a magnetic isolation bridge 300. The multiple iron cores 110 are connected in a chain structure, corresponding to the structure of the insulating frame 200, which is convenient for assembly. The fewer the magnetic isolation bridges 300 used, the lower the magnetic flux leakage, but the lower the connection strength. Therefore, it is necessary to balance the magnetic flux leakage and the connection strength.

[0045] It is understandable that the two adjacent cores 110 are connected by the magnetic isolation bridge 300. Since the core 110 has multiple layers of silicon steel sheets, there are many ways to arrange the magnetic isolation bridge 300. Considering the mutual influence of the electromagnetic field, it is a better solution to have the silicon steel sheets distributed in the two adjacent groups of magnetic isolation bridges 300 at different levels in the circumferential direction of the core component 100. Figure 4 , from the top view of the core component 100, not all silicon steel sheets are provided with magnetic isolation bridges 300, but are selectively provided, such as Figure 5As shown, the first group of magnetic isolation bridges 300 are distributed on the first odd layer, the first even layer, the last odd layer and the last even layer of the silicon steel sheet, and the second group of magnetic isolation bridges 300 are distributed on the second odd layer, the second even layer, the second to last odd layer and the second to last even layer of the silicon steel sheet, and so on. Or as Figure 6 and Figure 7 As shown, multiple groups of magnetic isolation bridges 300 can also be arranged in an X shape to achieve less magnetic leakage while ensuring that multiple iron cores 110 are connected.

[0046] Reference Figure 3 It can be understood that the magnetic isolation bridge 300 is located between the boots 140 of the two adjacent cores 110, and the side of the magnetic isolation bridge 300 facing the yoke 120 is provided with a first bending groove 301. During the bending process of the core component 100, the first bending groove 301 is conducive to the bending deformation of the magnetic isolation bridge 300. During the bending process of the core component 100, the first bending groove 301 gradually shrinks, that is, the opening narrows, until the core component 100 completes the bending step. In order to prevent interference and inability to close during the bending process, a certain gap is reserved in the first bending groove 301 after the bending is completed. The size of the gap is preferably not more than 1 / 3 of the width of the first bending groove 301, which can avoid interference between the two adjacent cores 110 due to cumulative tolerances, facilitate assembly operations, and improve efficiency.

[0047] Reference Figure 3 It is understood that the side of the magnetic isolation bridge 300 facing away from the yoke 120 is further provided with a second curved groove 302. Since the side of the magnetic isolation bridge 300 facing away from the yoke 120 will be stretched during the bending process of the core component 100, the provision of the second curved groove 302 facilitates deformation and stretching of the magnetic isolation bridge 300, improves reliability, and prevents the magnetic isolation bridge 300 from breaking. The provision of the first curved groove 301 and the second curved groove 302 also reduces magnetic leakage and improves the efficiency of electromagnetic energy conversion.

[0048] It is understood that the insulating frame 200 is provided with a through-hole 211, the shape of which is consistent with that of the tooth portion 130. The tooth portion 130 of the core 110 is mounted in the through-hole 211, thereby being fixedly connected to the insulating frame 200. Considering that the winding wires are wound outside the insulating frame 200, the insulating frame 200 needs to separate the core 110 from the winding wires. Therefore, the insulating frame 200 surrounds the core 110. A boot baffle 212 and a yoke baffle 213 are located at both ends of the through-hole 211. The boot baffle 212 abuts the side of the boot 140 facing the yoke 120, and the yoke baffle 213 abuts the side of the yoke 120 facing the boot 140, preventing the winding wires from contacting the core 110 and thus preventing short circuits. The boot baffle 212 and the yoke baffle 213 also define the position of the tooth portion 130 within the through-hole 211, preventing displacement.

[0049] It is understandable that the insulating frame 200 can be assembled from a first frame (not shown in the figure) and a second frame (not shown in the figure), the first frame and the second frame each have a half slot, and the two half slots form the through cavity 211.

[0050] It is understandable that the insulating frame 200 may also be a single part, and each insulating frame 200 is formed by integral injection molding and then installed one by one on the outside of the core component 100 to wrap the core 110 .

[0051] The stator core assembly of the present invention is composed of a core component 100 and an insulating frame 200. The multiple cores 110 of the core component 100 are connected in a chain shape through a magnetic isolation bridge 300. The magnetic isolation bridge 300 is used to reduce the amount of magnetic leakage, which is beneficial to improving the efficiency of electromagnetic energy conversion and improving the performance of the motor (especially the outer rotor motor); moreover, the tooth portion 130 of the core 110 is installed in the through cavity 211 of the insulating frame 200 to fix the insulating frame 200 to the core 110, and the structure is stable and reliable.

[0052] It is understood that the core 110 corresponds to the insulating frame 200 on a one-to-one basis, that is, one core component 100 is connected to one insulating frame 200. Furthermore, the shape and cross-section of the through-hole 211 of each insulating frame 200 match those of the teeth 130. In terms of design, the through-hole 211 may be pre-set with a certain clearance to facilitate assembly of the core 110.

[0053] Reference Figure 8It is understandable that during the bending process of the insulating frame 200, the boot baffle 212 will also deform. Therefore, a bending groove 215 is provided on the side of the boot baffle 212 facing away from the boot 140. Considering that the deformation of the boot baffle 212 is circumferentially expanded, the bending groove 215 is arranged along the axial direction of the core component 100. During the bending process of the insulating frame 200, the expansion of the bending groove 215 is utilized to reduce the deformation of the boot baffle 212, which is beneficial to protecting the insulating frame 200 and reducing the risk of fracture. Considering that when the insulating frame 200 is bent, the position of the insulating frame 200 with the greatest deformation is the position where the magnetic isolation bridge 300 is located, two bending grooves 215 are arranged at the position where each magnetic isolation bridge 300 is located in the circumferential direction of the core component 100, and a bending groove 215 is distributed on each side of the magnetic isolation bridge 300. The two bending grooves 215 are used to disperse the deformation, which is beneficial to reducing the deformation of the boot baffle 212, preventing fracture, and improving reliability.

[0054] Reference Figure 9 It can be understood that the outer side surface of the boot portion 140 is an arc surface and the curvature radius of the arc surface is r. Figure 2 As shown, the wall surface of the bending groove 215 is a cylindrical surface and the radius of the cylindrical surface is set to 0.002r to 0.007r, among which the cylindrical radius of 0.005r is the best solution. Under the premise of satisfying deformation, the cross-sectional area of ​​the bending groove 215 is more appropriate and easy to process.

[0055] Reference Figure 8 As will be appreciated, hooks 214 are provided on the edge of the yoke baffle 213, extending toward the boot 140. These hooks 214 help define the windings, preventing the winding conductors from moving and contacting the core 110, thereby preventing short circuits. One hook 214 can be provided on each side of the yoke baffle 213, or multiple hooks 214 can be provided on each side of the yoke baffle 213. These hooks 214 can be manufactured cost-effectively through an integrated injection molding process.

[0056] Reference Figure 9 It can be understood that the outer side surface of the boot 140 is an arc surface and the curvature radius of the arc surface is r. Along the circumference of the arc surface, the width of the inner side surface of the boot 140 is c, the length of the core component 100 is L, and the number of cores 110 in the core component 100 is x. The design satisfies: xc<L<2xr*sin(180° / x), so that the length of the core component 100 can meet the bending requirement and prevent the magnetic isolation bridge 300 or the core 110 from being excessively deformed and damaged.

[0057] It is understood that the core component 100 can also be configured in a ring shape, that is, the multiple cores 110 of the core component 100 are connected end to end to form a ring structure. During assembly of the motor core assembly, the insulating frames 200 can be installed one by one on the core component 100. The multiple insulating frames 200 are independent of each other, and installing the insulating frames 200 one by one can also reduce the time of the rounding operation and improve assembly efficiency.

[0058] It is understood that the insulating frame 200 comprises a first frame and a second frame. The first and second frames are assembled to form the insulating frame 200 and cooperate to clamp the iron core 110, thereby connecting it to the iron core component 100. Structurally, dividing the insulating frame 200 into the first and second frames facilitates processing and manufacturing, reducing the complexity of the injection mold. Furthermore, the multiple iron cores 110 of the iron core component 100 are connected, making the split insulating frame 200 easier to assemble individually. This is particularly suitable for embodiments in which the iron core component 100 employs a ring structure. The first and second frames can be connected and secured via cooperating clips or connectors. Furthermore, the stator windings can also define and secure the first and second frames.

[0059] Reference Figure 2 , bosses 216 are provided on both axial side surfaces of the insulating frame 200, and the bosses 216 are used to cooperate with the winding machine to facilitate the winding machine to fix the insulating frame 200, such as using a clamp to clamp the bosses 216 to facilitate winding operations.

[0060] The stator (not shown in the figure) proposed in the embodiment of the second aspect of the present invention includes the stator core assembly and winding of the embodiment of the first aspect. The stator core assembly includes a core component 100 and multiple insulating frames 200. Each insulating frame 200 is an independent component. The core component 100 includes multiple cores 110. The number of insulating frames 200 and cores 110 is equal, and an insulating frame 200 is installed on each core 110.

[0061] The core 110 includes a connected yoke 120, teeth 130, and boots 140. The yoke 120 and boots 140 are located at either end of the teeth 130. Along the circumference of the core component 100 (for an annular core component 100), the boots 140 are arranged on either side of the teeth 130. The boots 140 of two adjacent cores 110 are close together but not in contact. The stator winding is sheathed around the teeth 130, with the boots 140 radially confining the winding to prevent displacement or detachment.

[0062] Reference Figure 3Along the circumference of the core component 100, a clamping strip 121 is provided on one side of the yoke 120, and a clamping groove 122 is provided on the other side. When multiple cores 110 are assembled into a ring-shaped core component 100, the clamping strip 121 of one of the two adjacent cores 110 is inserted into the clamping groove 122 of the other, and the yokes 120 of the multiple cores 110 are combined into a ring body, so that the core component 100 has a stable structure and improves its reliability.

[0063] Reference Figure 3 and Figure 9 , multiple iron cores 110 are arranged in sequence, and two adjacent iron cores 110 are connected by a magnetic isolation bridge 300. The leakage flux saturation value of the magnetic isolation bridge 300 is low. The low saturation value of the leakage flux of the magnetic isolation bridge 300 is used to limit the leakage flux, thereby achieving the purpose of reducing the leakage flux. It should be understood that the iron core 110 is formed by stacking multiple layers of soft material. The soft material usually used is silicon steel sheet. The magnetic isolation bridge 300 is punched out as a whole during the stamping process of the silicon steel sheet, so that multiple iron cores 110 can be connected in sequence. Since the iron core 110 is formed by stacking multiple layers of silicon steel sheets, the magnetic isolation bridge 300 can be set in one layer or a few layers of silicon steel sheets, which is conducive to reducing the leakage flux. For example, the first and last layers of silicon steel sheets can be provided with a magnetic isolation bridge 300. The multiple iron cores 110 are connected in a chain structure, corresponding to the structure of the insulating frame 200, which is convenient for assembly.

[0064] It is understandable that the two adjacent cores 110 are connected by the magnetic isolation bridge 300. Since the core 110 has multiple layers of silicon steel sheets, there are many ways to arrange the magnetic isolation bridge 300. Considering the mutual influence of the electromagnetic field, it is a better solution to have the silicon steel sheets distributed in the two adjacent groups of magnetic isolation bridges 300 at different levels in the axial direction of the core component 100. Figure 4 , from the top view of the core component 100, not all silicon steel sheets are provided with magnetic isolation bridges 300, but are selectively provided, such as Figure 5 As shown, the first group of magnetic isolation bridges 300 are distributed in the first odd layer, the first even layer, the last odd layer and the last even layer of the silicon steel sheet, and the second group of magnetic isolation bridges 300 are distributed in the second odd layer, the second even layer, the second to last odd layer and the second to last even layer of the silicon steel sheet, and so on. Figure 6 and Figure 7 As shown, multiple groups of magnetic isolation bridges 300 can also be arranged in an X shape to achieve less magnetic leakage while ensuring that multiple iron cores 110 are connected.

[0065] Reference Figure 3It can be understood that the magnetic isolation bridge 300 is located between the boots 140 of the two adjacent cores 110, and the side of the magnetic isolation bridge 300 facing the yoke 120 is provided with a first bending groove 301. During the bending process of the core component 100, the first bending groove 301 is conducive to the bending deformation of the magnetic isolation bridge 300. During the bending process of the core component 100, the first bending groove 301 gradually shrinks, that is, the opening narrows, until the core component 100 completes the bending step. In order to prevent interference and inability to close during the bending process, a certain gap is reserved in the first bending groove 301 after the bending is completed. The size of the gap is preferably not more than 1 / 3 of the width of the first bending groove 301, which can avoid interference between the two adjacent cores 110 due to cumulative tolerances, facilitate assembly operations, and improve efficiency.

[0066] Reference Figure 3 It is understood that the side of the magnetic isolation bridge 300 facing away from the yoke 120 is further provided with a second curved groove 302. Since the side of the magnetic isolation bridge 300 facing away from the yoke 120 will be stretched during the bending process of the core component 100, the provision of the second curved groove 302 facilitates deformation and stretching of the magnetic isolation bridge 300, improves reliability, and prevents the magnetic isolation bridge 300 from breaking. The provision of the first curved groove 301 and the second curved groove 302 also reduces magnetic leakage and improves the efficiency of electromagnetic energy conversion.

[0067] The stator core assembly of the present invention is composed of a core component 100 and an insulating frame 200. The multiple cores 110 of the core component 100 are connected in a chain shape through a magnetic isolation bridge 300. The magnetic isolation bridge 300 is used to reduce the amount of magnetic leakage, which is beneficial to improving the efficiency of electromagnetic energy conversion and improving the performance of the motor (especially the outer rotor motor); moreover, the tooth portion 130 of the core 110 is installed in the through cavity 211 of the insulating frame 200 to fix the insulating frame 200 to the core 110, and the structure is stable and reliable.

[0068] The motor proposed in the third embodiment of the present invention includes the stator of the second embodiment and has all the technical effects of the stator, which will not be described in detail.

[0069] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the spirit of the present invention.

Claims

1. Stator core assembly, characterized in that, include: The iron core component comprises a plurality of iron cores arranged in sequence, wherein two adjacent iron cores are connected by a magnetic isolation bridge; A plurality of independent insulating frames, each of the insulating frames corresponding to the iron core; The iron core includes a connected yoke, a tooth and a shoe, the yoke and the shoe are arranged at both ends of the tooth, the insulating frame is provided with a through-hole, and the tooth is installed in the through-hole; The magnetic isolation bridge is located between the boots of two adjacent iron cores; The iron core is a multi-layer silicon steel sheet laminated structure, and the magnetic isolation bridge connects at least one layer of the silicon steel sheet of two adjacent iron core components. Along the circumference of the iron core component, the layers of two adjacent groups of magnetic isolation bridges are different.

2. The stator core assembly according to claim 1, characterized in that A first curved groove is provided on a side of the magnetic isolation bridge facing the yoke.

3. The stator core assembly according to claim 2, characterized in that: A second curved groove is provided on a side of the magnetic isolation bridge facing away from the yoke portion. Along the radial direction of the core component, a depth of the second curved groove is less than a depth of the first curved groove.

4. The stator core assembly according to any one of claims 1 to 3, characterized in that: Along the circumference of the core component, a clamping strip is provided on one side of the yoke, and a clamping groove matching the clamping strip is provided on the other side.

5. The stator core assembly according to claim 4, characterized in that: The insulating frame is provided with a boot baffle and a yoke baffle. The boot baffle abuts against the side of the boot facing the yoke, and the yoke baffle abuts against the side of the yoke facing the boot.

6. The stator core assembly according to claim 5, characterized in that: The edge of the yoke baffle is provided with a hook corner, and the hook corner extends toward the boot portion.

7. The stator core assembly according to any one of claims 1 to 3, characterized in that: The outer side surface of the boot is an arc surface and the curvature radius of the arc surface is r. Along the circumference of the arc surface, the width of the inner side surface of the boot is c. The length of the core component is L. The number of the cores is x, satisfying: xc<L<2xr*sin(180° / x).

8. The stator core assembly according to any one of claims 1 to 3, characterized in that: The multiple cores of the core component are connected end to end to form a ring structure.

9. The stator core assembly according to any one of claims 1 to 3, characterized in that: The insulating frame includes a first frame and a second frame. The first frame and the second frame are assembled into the insulating frame and are arranged on both axial sides of the iron core.

10. The stator core assembly according to any one of claims 1 to 3, characterized in that: The insulating frame is an injection molded part and is installed outside the iron core.

11. A stator, characterized in that The invention comprises the stator core assembly according to any one of claims 1 to 10.

12. The motor is characterized in that Comprising the stator according to claim 11.

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