CN218569933U - Stator iron core assembly, stator and motor - Google Patents

Abstract

The utility model discloses a stator iron core subassembly, stator and motor, wherein stator iron core subassembly includes iron core part and a plurality of independent insulating frame, iron core part includes a plurality of iron cores that arrange in proper order, and two adjacent iron cores are connected through separating the magnetic bridge, insulating frame with the iron core one-to-one; the iron core comprises a yoke portion, a tooth portion and shoe portions which are connected, the yoke portion and the shoe portions are arranged at two ends of the tooth portion, a penetrating cavity is formed in the insulating frame, and the tooth portion is arranged in the penetrating cavity. The plurality of iron cores of the iron core component are connected in sequence through the magnetic isolation bridge, and the magnetic leakage quantity is reduced by utilizing the magnetic isolation bridge, so that the electromagnetic energy conversion efficiency is improved, and the performance of the motor is improved; and the tooth part of the iron core is arranged in the penetrating cavity of the insulating frame, and each independent insulating frame is fixed on the iron core component, so that the structure is stable and reliable.

Description

Stator iron core assembly, stator and motor

Technical Field

The utility model relates to the technical field of electric machine, in particular to stator core subassembly, stator and motor.

Background

In the related art, in the manufacturing process of the motor, the bar-shaped iron core needs to be rounded to obtain an annular iron core, so as to perform the next manufacturing process. Traditional bar iron core's structure when carrying out the iron core and punching the piece, makes the iron core towards the piece and be the structure that the pole shoe of a plurality of iron cores directly links to each other, in this kind of structure, directly links to each other between the pole shoe of a plurality of iron cores, and the magnetic leakage flux height leads to electromagnetic energy conversion's efficiency lower, influences external rotor electric machine's performance.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a stator core subassembly can effectively improve electromagnetic energy conversion's efficiency.

The utility model discloses provide the stator of using above-mentioned stator core subassembly simultaneously.

The utility model discloses still provide the motor of using above-mentioned stator.

According to the embodiment of the first aspect of the present invention, the stator core assembly comprises an iron core component and a plurality of independent insulating frames, wherein the iron core component comprises a plurality of iron cores arranged in sequence, two adjacent iron cores are connected through a magnetic isolation bridge, and the insulating frames correspond to the iron cores one by one; the iron core comprises a yoke portion, a tooth portion and shoe portions which are connected, the yoke portion and the shoe portions are arranged at two ends of the tooth portion, a penetrating cavity is formed in the insulating frame, and the tooth portion is arranged in the penetrating cavity.

According to the utility model discloses stator core subassembly of first aspect embodiment has following beneficial effect at least: the plurality of iron cores of the iron core component are connected in sequence through the magnetic isolation bridge, and the magnetic isolation bridge is utilized to reduce the magnetic leakage, thereby being beneficial to improving the efficiency of electromagnetic energy conversion and improving the performance of the motor; and the tooth part of the iron core is arranged in the penetrating cavity of the insulating frame, and each independent insulating frame is fixed on the iron core component, so that the structure is stable and reliable.

According to the utility model discloses some embodiments of the first aspect, the iron core is multilayer silicon steel sheet superposed structure, separate the magnetic bridge and connect adjacent two the at least one deck of iron core component the silicon steel sheet is followed the circumference of iron core component, adjacent two sets of separate the level at magnetic bridge place and be different.

According to the utility model discloses some embodiments of first aspect, it is located adjacent two to separate the magnetic bridge the iron core between the boots, separate the magnetic bridge orientation the side of yoke portion is provided with first curved slot.

According to some embodiments of the first aspect of the present invention, the side of the magnetic shield bridge facing away from the yoke portion is provided with a second curved groove, and along the radial direction of the core member, the depth of the second curved groove is smaller than the depth of the first curved groove.

According to the utility model discloses some embodiments of first aspect follow the circumference of iron core component, one side of yoke portion is provided with the card strip, and the opposite side is provided with the cooperation the draw-in groove of card strip.

According to some embodiments of the first aspect of the present invention, the insulating frame is provided with a shoe baffle abutting against the shoe towards the side of the yoke and a yoke baffle abutting against the yoke towards the side of the shoe.

According to some embodiments of the first aspect of the present invention, the edge of the yoke flap is provided with a hook angle, the hook angle extending towards the boot.

According to some embodiments of the first aspect of the present invention, the outer side surface of the boot part is a circular arc surface and the radius of curvature 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 part is c, the length of the iron core component is L, the number of the iron cores is x, and satisfies: xc < L < 2xr sin (180 °/x).

According to some embodiments of the first aspect of the present invention, a plurality of said cores of said core assembly are end-to-end to form an annular structure.

According to some embodiments of the first aspect of the present invention, the insulating frame includes a first frame and a second frame, the first frame and the second frame are combined into the insulating frame, and are disposed on both axial sides of the core.

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.

A stator according to an embodiment of the second aspect of the present invention comprises a stator core assembly as described in the embodiment of the first aspect.

According to the third aspect of the invention, the motor comprises the stator as described in the second aspect of the invention.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

Additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a top view of a stator core assembly according to an embodiment of the first aspect of the invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

fig. 3 is a partial front view of a core component in an embodiment of the first aspect of the invention;

FIG. 4 is a partial top view of the core component of FIG. 3;

fig. 5 is a first schematic layout diagram of a magnetic isolation bridge according to an embodiment of the present invention;

fig. 6 is a second schematic layout view of the magnetic isolation bridge according to the first embodiment of the present invention;

fig. 7 is a third schematic layout view of the magnetic isolation bridge in the embodiment of the first aspect of the present invention;

fig. 8 is a front view of an insulating frame in an embodiment of the first aspect of the present invention;

fig. 9 is a cross-sectional view of a core component in an embodiment of the first aspect of the invention.

The reference numbers are as follows:

the core assembly 100, the core 110, the yoke 120, the clip strips 121, the clip grooves 122, the teeth 130, and the shoes 140;

the insulation frame 200, a through cavity 211, a boot part baffle 212, a yoke part baffle 213, a hook angle 214, a bending groove 215 and a boss 216;

magnetic isolation bridge 300, first curved slot 301, second curved slot 302.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, if there are first and second descriptions for distinguishing technical features, they are not interpreted as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

In the related art, a stator of an outer rotor motor is composed of an iron core and a winding, and the winding is mounted on the iron core through an insulating frame. The iron core is generally rounded by a flaky iron core punching sheet to obtain an annular iron core, when the iron core punching sheet is processed, the iron core punching sheet is manufactured into a structure that pole shoe interconnection of a plurality of iron cores is realized, the pole shoe of any two adjacent iron cores are completely connected, all adjacent iron cores in each layer of iron core punching sheet are connected, and as the pole shoe of the plurality of iron cores are directly connected, the electromagnetic energy conversion efficiency is lower, the magnetic leakage amount is large, and the performance of the outer rotor motor is influenced.

Therefore, the embodiment of the utility model provides a be applied to stator core subassembly of motor is proposed to the embodiment of first aspect, can effectively reduce the magnetic leakage volume, improves electromagnetic energy conversion's efficiency, is favorable to improving the performance of motor.

Referring to fig. 1 to 3, a stator core assembly according to an embodiment of the first aspect of the present invention includes a core assembly 100 and a plurality of insulating frames 200, each insulating frame 200 is an independent component, the core assembly 100 includes a plurality of cores 110, the number of the insulating frames 200 and the number of the cores 110 are equal, and one insulating frame 200 is mounted on each core 110. The core 110 is typically made of soft magnetic material, usually silicon steel, which is also called soft magnetic material when the magnetization occurs at Hc of not more than 1000A/m. The soft magnetic material can realize maximum magnetization intensity with minimum external magnetic field, and has low coercive force and high magnetic conductivity. Soft magnetic materials are easy to magnetize and demagnetize, and are widely used in electrical and electronic equipment.

It is understood that the core 110 includes the yoke 120, the tooth 130, and the shoes 140 connected, the yoke 120 and the shoes 140 are distributed at both ends of the tooth 130, and the shoes 140 are arranged at both sides of the tooth 130 in a circumferential direction of the core part 100 (with respect to the ring-shaped core part 100). The stator windings are fitted around the outside of the teeth 130, and are radially confined by the shoes 140, preventing the windings from being displaced or disengaged.

Referring to fig. 3, in the circumferential direction of the core component 100, one side of the yoke portion 120 is provided with a clip strip 121, and the other side is provided with a clip groove 122, when the plurality of cores 110 are assembled into the annular core component 100, the clip strip 121 of one of two adjacent cores 110 is clipped into the other clip groove 122, and the yoke portions 120 of the plurality of cores 110 are assembled into an annular body, so that the core component 100 has a stable structure and the use reliability is improved.

Referring to fig. 3 and 9, the plurality of cores 110 are sequentially arranged, two adjacent cores 110 are connected by the magnetic isolation bridge 300, the saturation value of the leakage flux of the magnetic isolation bridge 300 is low, and the leakage flux is limited by the low saturation value of the leakage flux of the magnetic isolation bridge 300, so that the purpose of reducing the leakage flux is achieved. It should be understood that the iron core 110 is formed by laminating a plurality of layers of soft materials, the soft material is generally a silicon steel sheet, and the magnetic isolation bridge 300 is integrally stamped in the stamping process of the silicon steel sheet, so that the plurality of iron cores 110 are sequentially connected. Because the iron core 110 is formed by the superposition of a plurality of layers of silicon steel sheets, the magnetic isolation bridge 300 is arranged in one or a few layers of silicon steel sheets, which is beneficial to reducing the magnetic leakage, for example, the first layer and the last layer of silicon steel sheets are provided with the magnetic isolation bridge 300, and the plurality of iron cores 110 are connected into a chain structure, corresponding to the structure of the insulating frame 200, so that the assembly is convenient. The smaller the number of the magnetic isolation bridges 300 used, the lower the leakage flux, but the lower the connection strength, and therefore, the leakage flux and the connection strength need to be balanced.

It can be understood that two adjacent iron cores 110 are connected by the magnetic isolation bridge 300, and since the iron cores 110 have multiple layers of silicon steel sheets, there are multiple arrangements of the magnetic isolation bridge 300, and considering the mutual influence of electromagnetic fields, it is preferable that the silicon steel sheets distributed by two adjacent groups of magnetic isolation bridges 300 are different in level in the circumferential direction of the iron core component 100. Referring to fig. 4, in a top view of the core member 100, not all the silicon steel sheets are provided with the magnetic isolation bridges 300, but are selectively arranged, as shown in fig. 5, the magnetic isolation bridges 300 of the first group are distributed in 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 sheets, and the magnetic isolation bridges 300 of the second group are distributed in the odd-numbered second layer, the even-numbered second layer, the odd-numbered penultimate layer, and the even-numbered penultimate layer of the silicon steel sheets, and are cycled. Alternatively, as shown in fig. 6 and 7, the plurality of sets of magnetic bridges 300 may be arranged in an X shape, so as to achieve a smaller amount of leakage flux on the premise that the plurality of cores 110 are connected.

Referring to fig. 3, it can be understood that the magnetic bridge 300 is located between the shoes 140 of two adjacent cores 110, and the side of the magnetic bridge 300 facing the yoke 120 is provided with a first bending groove 301, and the first bending groove 301 facilitates the bending deformation of the magnetic bridge 300 during the rounding of the core part 100. In the process of bending the iron core component 100, the first bending groove 301 is gradually reduced, that is, the opening is narrowed, until the iron core component 100 completes the step of bending the iron core component, in order to prevent the phenomenon that the first bending groove 301 cannot be closed due to interference in the process of bending the iron core component, a certain gap is reserved after the first bending groove 301 is bent, the size of the gap is preferably not more than 1/3 of the width of the first bending groove 301, the interference between two adjacent iron cores 110 caused by accumulated tolerance can be avoided, the assembly operation is facilitated, and the efficiency is improved.

Referring to fig. 3, it can be understood that the side of the magnetic isolation bridge 300 away from the yoke portion 120 is further provided with a second bending groove 302, and since the side of the magnetic isolation bridge 300 away from the yoke portion 120 is stretched in the process of rounding the core component 100, the second bending groove 302 is provided, which is beneficial to the deformation and stretching of the magnetic isolation bridge 300, improves the reliability, and prevents the magnetic isolation bridge 300 from breaking. And through setting up first curved groove 301 and second curved groove 302, can also reduce the magnetic leakage volume, improve electromagnetic energy conversion's efficiency.

It can be understood that the insulation frame 200 is provided with the through cavities 211, the shapes of the through cavities 211 are identical to the shapes of the teeth 130, and the teeth 130 of the core 110 are seated in the through cavities 211, thereby being fixedly coupled to the insulation frame 200. Considering that the wire of the winding is wound outside the insulating frame 200, the insulating frame 200 is to separate the iron core 110 from the wire of the winding, so that the insulating frame 200 surrounds the iron core 110, a shoe baffle 212 and a yoke baffle 213 are distributed at two ends of the through cavity 211, the shoe baffle 212 abuts against the side of the shoe 140 facing the yoke 120, and the yoke baffle 213 abuts against the side of the yoke 120 facing the shoe 140, so as to prevent the wire of the winding from contacting the iron core 110 and avoid short circuit. The shoe shield 212 and the yoke shield 213 simultaneously define the position of the tooth 130 in the through cavity 211, preventing displacement.

It is understood that the insulating frame 200 may be formed by a first frame (not shown) and a second frame (not shown) which are assembled together, each having a half-slot, and the two half-slots form the through cavity 211.

It is understood that the insulation frames 200 may be a single part, and each insulation frame 200 is formed by integral injection molding and then installed one by one outside the core part 100 to surround the core 110.

The utility model discloses a stator core subassembly comprises iron core component 100 and insulating frame 200, and a plurality of iron cores 110 of iron core component 100 connect as the chain through magnetic isolation bridge 300, utilize magnetic isolation bridge 300 to reduce the magnetic leakage volume, are favorable to improving electromagnetic energy conversion's efficiency, improve the performance of motor (especially external rotor motor); moreover, the tooth portion 130 of the iron core 110 is disposed in the through cavity 211 of the insulating frame 200 to fix the insulating frame 200 to the iron core 110, so that the structure is stable and reliable.

It is understood that the cores 110 are in one-to-one correspondence with the insulation frames 200, that is, the core members 100 are connected to one insulation frame 200, and the shape and cross section of the through cavity 211 of each insulation frame 200 are matched with the teeth 130. In design, the through cavity 211 may be pre-configured with a certain relief hole to facilitate assembly of the core 110.

Referring to fig. 8, it can be understood that the shoe shield 212 is also deformed during the rounding of the insulating frame 200, and therefore, the bending grooves 215 are provided on the side of the shoe shield 212 facing away from the shoe 140, and considering that the deformation of the shoe shield 212 is expanded in the circumferential direction, the bending grooves 215 are arranged along the axial direction of the core member 100, and the expansion of the bending grooves 215 is utilized to reduce the deformation of the shoe shield 212 during the rounding of the insulating frame 200, thereby facilitating the protection of the insulating frame 200 and reducing the risk of breakage. Considering that the position where the maximum deformation in the insulating frame 200 is located in the magnetic isolation bridge 300 when the insulating frame 200 is bent to be round is the position, two bending grooves 215 are arranged in the position where each magnetic isolation bridge 300 is located in the circumferential direction of the core component 100, one bending groove 215 is respectively distributed on each of two sides of the magnetic isolation bridge 300, and the two bending grooves 215 are used for dispersing the deformation amount, so that the deformation of the boot baffle 212 is reduced, the breakage is prevented, and the reliability is improved.

Referring to fig. 9, it can be understood that the outer side surface of the shoe part 140 is a circular arc surface and the curvature radius of the circular arc surface is r, as shown in fig. 2, 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, wherein the radius of the cylindrical surface is preferably 0.005r, and the sectional area of the bending groove 215 is suitable and the processing is convenient on the premise of satisfying the deformation.

Referring to fig. 8, it can be appreciated that a hook angle 214 is provided at an edge of the yoke stop 213, the hook angle 214 extending toward the shoe 140, the hook angle 214 serving to help define the winding and prevent the wire of the winding from moving to contact the core 110, preventing a short circuit problem. The hook 214 may be disposed on each of both side edges of the yoke damper 213, or a plurality of hooks may be disposed on each of both side edges of the yoke damper 213, and the hook 214 may be manufactured by an integral injection molding process, which is low in cost.

Referring to fig. 9, it can be understood that the outer side surface of the shoe part 140 is an arc surface and the radius of curvature of the arc surface is r, the width of the inner side surface of the shoe part 140 is c, the length of the core component 100 is L, the number of the cores 110 in the core component 100 is x, and the following are satisfied in design: xc < L < 2xr sin (180 °/x) enables the length of the core component 100 to meet the requirement of rounding, preventing the magnetic bridge 300 or the core 110 from being damaged due to excessive deformation.

It is to be understood that the core member 100 may also be provided in a ring shape, that is, a plurality of cores 110 of the core member 100 are connected end to form a ring structure, and in the assembly of the motor core assembly, the insulating frames 200 are mounted to the core member 100 one by one. The plurality of insulating frames 200 are independent from each other, and the insulating frames 200 are installed one by one, thereby reducing the time of the rounding operation and improving the assembling efficiency.

It is understood that the insulation frame 200 includes a first frame and a second frame which are combined into the insulation frame 200 and cooperate to sandwich the core 110, thereby being coupled to the core part 100. Structurally, the insulation frame 200 is divided into the first frame and the second frame, which is advantageous for manufacturing and reducing the complexity of the injection mold, and the plurality of cores 110 of the core part 100 are connected, and the divided insulation frame 200 is advantageous for assembly one by one, and is particularly suitable for an embodiment in which the core part 100 has a ring structure. The first frame and the second frame can be connected and fixed through mutually matched buckles or plug connectors, and in addition, the first frame and the second frame can be limited by the winding of the stator to play a role in fixing.

Referring to fig. 2, bosses 216 are disposed on both axial sides of the insulating frame 200, and the bosses 216 are used for cooperating with a winding machine, so that the winding machine can fix the insulating frame 200 conveniently, for example, the bosses 216 are clamped by a clamp, so as to facilitate winding operation.

The utility model discloses the stator (not shown in the figure) that the second aspect embodiment provided, including the stator core subassembly and the winding of the first aspect embodiment, the stator core subassembly includes iron core component 100 and a plurality of insulating frame 200, and every insulating frame 200 is independent part, and iron core component 100 includes a plurality of iron cores 110, and the quantity of insulating frame 200 and iron core 110 equals, installs an insulating frame 200 on every iron core 110.

The core 110 includes a yoke 120, a tooth 130 and shoes 140 connected to each other, the yoke 120 and the shoes 140 are distributed at both ends of the tooth 130, the shoes 140 are arranged at both sides of the tooth 130 along the circumferential direction of the core 100 (for the ring-shaped core 100), and the shoes 140 of two adjacent cores 110 are close to each other without contact. The stator windings are fitted around the outside of the teeth 130, and are radially confined by the shoes 140, preventing the windings from being displaced or disengaged.

Referring to fig. 3, in the circumferential direction of the core component 100, one side of the yoke portion 120 is provided with a clamping strip 121, and the other side is provided with a clamping groove 122, when the plurality of cores 110 are assembled into the annular core component 100, the clamping strip 121 of one of the two adjacent cores 110 is clamped into the other clamping groove 122, and the yoke portions 120 of the plurality of cores 110 are assembled into an annular body, so that the core component 100 has a stable structure and the use reliability is improved.

Referring to fig. 3 and 9, the plurality of iron cores 110 are sequentially arranged, two adjacent iron cores 110 are connected through the magnetic isolation bridge 300, the saturation value of the leakage flux of the magnetic isolation bridge 300 is low, and the leakage flux is limited by using the low saturation value of the leakage flux of the magnetic isolation bridge 300, so that the purpose of reducing the leakage flux is achieved. It should be understood that the iron core 110 is formed by laminating a plurality of layers of soft materials, the soft material is generally a silicon steel sheet, and the magnetic isolation bridge 300 is integrally stamped in the stamping process of the silicon steel sheet, so that the plurality of iron cores 110 are sequentially connected. Because the iron core 110 is formed by the superposition of a plurality of layers of silicon steel sheets, the magnetic isolation bridge 300 is arranged in one or a few layers of silicon steel sheets, which is beneficial to reducing the magnetic leakage, for example, the first layer and the last layer of silicon steel sheets are provided with the magnetic isolation bridge 300, and the plurality of iron cores 110 are connected into a chain structure, corresponding to the structure of the insulating frame 200, so that the assembly is convenient.

It can be understood that two adjacent iron cores 110 are connected by the magnetic isolation bridge 300, and since the iron cores 110 have multiple layers of silicon steel sheets, there are multiple arrangements of the magnetic isolation bridge 300, and considering the mutual influence of electromagnetic fields, it is preferable that the silicon steel sheets distributed by two adjacent groups of magnetic isolation bridges 300 are different in level in the axial direction of the iron core component 100. Referring to fig. 4, in a top view of the core member 100, not all the silicon steel sheets are provided with the magnetic isolation bridges 300, but are selectively arranged, as shown in fig. 5, the magnetic isolation bridges 300 of the first group 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 sheets, and the magnetic isolation bridges 300 of the second group are distributed on the odd-numbered second layer, the even-numbered second layer, the odd-numbered penultimate layer and the even-numbered penultimate layer of the silicon steel sheets, and the cycle is repeated. As shown in fig. 6 and 7, the plurality of sets of magnetic bridges 300 may be arranged in an X shape, so that a smaller amount of leakage flux is achieved on the premise that the plurality of cores 110 are connected.

Referring to fig. 3, it can be understood that the magnetic bridge 300 is located between the shoes 140 of two adjacent cores 110, and the side of the magnetic bridge 300 facing the yoke 120 is provided with a first bending groove 301, and the first bending groove 301 facilitates the bending deformation of the magnetic bridge 300 during the rounding of the core part 100. In the process of bending the iron core component 100, the first bending groove 301 is gradually reduced, that is, the opening is narrowed, until the iron core component 100 completes the step of bending the iron core component, in order to prevent the phenomenon that the first bending groove 301 cannot be closed due to interference in the process of bending the iron core component, a certain gap is reserved after the first bending groove 301 is bent, the size of the gap is preferably not more than 1/3 of the width of the first bending groove 301, the interference between two adjacent iron cores 110 caused by accumulated tolerance can be avoided, the assembly operation is facilitated, and the efficiency is improved.

Referring to fig. 3, it can be understood that the side of the magnetic isolation bridge 300 away from the yoke portion 120 is further provided with a second bending groove 302, and since the side of the magnetic isolation bridge 300 away from the yoke portion 120 is stretched in the process of rounding the core component 100, the second bending groove 302 is provided, which is beneficial to the deformation and stretching of the magnetic isolation bridge 300, improves the reliability, and prevents the magnetic isolation bridge 300 from breaking. And through setting up first curved groove 301 and second curved groove 302, can also reduce the magnetic leakage volume, improve electromagnetic energy conversion's efficiency.

The utility model discloses a stator core subassembly comprises iron core component 100 and insulating frame 200, and a plurality of iron cores 110 of iron core component 100 connect as the chain through magnetic isolation bridge 300, utilize magnetic isolation bridge 300 to reduce the magnetic leakage volume, are favorable to improving electromagnetic energy conversion's efficiency, improve the performance of motor (especially external rotor motor); moreover, the tooth portion 130 of the iron core 110 is disposed in the through cavity 211 of the insulating frame 200 to fix the insulating frame 200 to the iron core 110, so that the structure is stable and reliable.

The utility model discloses motor that third aspect embodiment provided, including the stator of second aspect embodiment, have all technological effects of stator, no longer describe.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge scope of those skilled in the art.

Claims (13)

1. A stator core assembly, comprising:

the iron core component comprises a plurality of iron cores which are sequentially arranged, and two adjacent iron cores are connected through a magnetic isolation bridge;

the plurality of independent insulating frames correspond to the iron cores one by one;

the iron core comprises a yoke portion, a tooth portion and shoe portions which are connected, the yoke portion and the shoe portions are arranged at two ends of the tooth portion, a penetrating cavity is formed in the insulating frame, and the tooth portion is arranged in the penetrating cavity.

2. The stator core assembly according to claim 1, wherein the core is a multi-layer silicon steel sheet laminated structure, the magnetic isolation bridges connect at least one layer of silicon steel sheets of two adjacent core components, and the two adjacent groups of magnetic isolation bridges are located at different levels along the circumferential direction of the core components.

3. The stator core assembly according to claim 1, wherein said magnetic bridge is located between said shoes of two adjacent said cores, said magnetic bridge being provided with a first curved slot on a side facing said yoke.

4. The stator core assembly according to claim 3, wherein a side of the flux-barrier bridge facing away from the yoke portion is provided with a second curved slot having a depth smaller than a depth of the first curved slot in a radial direction of the core component.

5. A stator core assembly according to any one of claims 1 to 4, wherein, in the circumferential direction of the core components, one side of the yoke is provided with a clip strip and the other side is provided with a slot that fits the clip strip.

6. The stator core assembly according to claim 5, wherein the insulating frame is provided with a shoe stop abutting against a side of the shoe facing the yoke and a yoke stop abutting against a side of the yoke facing the shoe.

7. The stator core assembly according to claim 6, wherein an edge of the yoke plate is provided with a hook angle extending towards the shoe.

8. The stator core assembly according to any one of claims 1 to 4, wherein the outer side surface of the shoe portion is a circular arc surface and the radius of curvature of the circular arc surface is r, the width of the inner side surface of the shoe portion is c in the circumferential direction of the circular arc surface, the length of the core member is L, the number of the cores is x, and the following conditions are satisfied: xc < L < 2xr sin (180 °/x).

9. A stator core assembly according to any one of claims 1 to 4, wherein a plurality of said cores of said core assembly are end-to-end to form an annular structure.

10. The stator core assembly according to any one of claims 1 to 4, wherein the insulating frame comprises a first frame and a second frame, the first frame and the second frame being split into the insulating frame and arranged on both axial sides of the core.

11. A stator core assembly according to any of claims 1-4, wherein the insulating frame is an injection moulded part, the insulating frame being mounted on the outside of the core.

12. A stator comprising a stator core assembly according to any one of claims 1 to 11.

13. Electrical machine, comprising a stator according to claim 12.

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