CN220711183U

CN220711183U - Motor stator and motor

Info

Publication number: CN220711183U
Application number: CN202322060470.4U
Authority: CN
Inventors: 李欣
Original assignee: Schaeffler Technologies AG and Co KG
Current assignee: Schaeffler Technologies AG and Co KG
Priority date: 2023-08-02
Filing date: 2023-08-02
Publication date: 2024-04-02
Anticipated expiration: 2033-08-02

Abstract

A motor stator and motor are provided that include a plurality of split assemblies and a carrier. The split assembly includes a core block, a coil, and an insulating member separating the core block and the coil. The plurality of split components are arranged into an annular array along the circumferential direction of the motor stator, and the carrier is sleeved with and constrains the annular array. The insulating member includes a convex portion and a concave portion. The convex portion protrudes to one side in the circumferential direction, and the concave portion is recessed to one side in the circumferential direction. The protrusion of one insulating member is inserted into the recess of the adjacent other insulating member so that the adjacent split assemblies are positioned with each other in the radial direction of the motor stator.

Description

Motor stator and motor

Technical Field

The present application relates to the field of motors, and more particularly to a motor stator and a motor.

Background

Stator cores of known motor stators may be assembled from a plurality of core segments. For example, chinese patent publication No. CN216086273U discloses a split stator core structure. The stator core structure comprises a plurality of splicing blocks, and the plurality of splicing blocks form an annular stator core. The stator core is fixed by the clips so that the plurality of splice blocks are maintained as one body. Adjacent two splicing blocks are positioned through the positioning grooves and the positioning protrusions, so that the stator core has small roundness error, and the clamp is easy to press in.

However, the detent and detent projections affect the performance of the motor. Specifically, the magnetic flux passes through the sides of the left and right outer arcs to form a magnetic circuit. The positioning grooves and the positioning protrusions enable the side surfaces of the left outer arc body and the right outer arc body to be uneven. The rugged side surface causes an increase in the local magnetic flux density of the core block compared to the flat side surface, so that the core block is locally easily heated, resulting in an increase in heat loss of the motor. In addition, the rugged side increases the reluctance of the magnetic circuit, so that the magnetic flux density of the stator core is reduced, resulting in a reduction in the operating efficiency of the motor.

Disclosure of Invention

The present application has been made in view of the state of the art described above. It is an object of the present application to provide a motor stator which overcomes at least one of the disadvantages described in the background above. The application also provides a motor comprising the motor stator.

In order to achieve the above object, the present application adopts the following technical solutions.

The application provides a motor stator as follows, it includes a plurality of amalgamation subassemblies and carrier, the amalgamation subassembly includes iron core piece, coil and insulating member, insulating member separates the iron core piece with the coil, a plurality of amalgamation subassemblies are followed motor stator's circumference is arranged into annular array, the carrier cover is established and is retrained annular array, insulating member includes convex part and concave part, the convex part is protruding to circumference one side, the concave part is sunken to circumference one side, one insulating member's convex part inserts adjacent another insulating member's concave part, makes adjacent amalgamation subassembly is in motor stator's radial is gone up each other and is fixed a position.

In an alternative, the male and female portions are complementary in shape.

In another alternative, the convex portion and the concave portion are formed in a semicircular shape.

In another alternative, the core block includes a tooth portion, a shoe portion, and a yoke portion, a circumferential end surface of the yoke portion being a plane, and the insulating member includes a tooth partition portion that partitions the tooth portion and the coil, a shoe partition portion that partitions the shoe portion and the coil, and a yoke partition portion that partitions the yoke portion and the coil.

In another alternative, the tooth partition defines a fixing groove provided at a circumferential end face of the tooth partition, the fixing groove extending in an axial direction of the motor stator, a plurality of the fixing grooves being arranged side by side in the radial direction, the wire of the coil being embedded in the fixing groove.

In another alternative, the yoke partition includes a first wall portion that is perpendicular to the radial direction and is connected to a radially outer side end portion of the tooth partition, the first wall portion being located radially inward of the yoke portion and separating the yoke portion and the coil, and a second wall portion that is perpendicular to an axial direction of the motor stator and extends radially outward from the first wall portion, the convex portion being provided at a circumferential side end portion of the second wall portion, and the concave portion being provided at a circumferential other side end portion of the second wall portion.

In another alternative, two of the second wall portions are spaced apart in the axial direction, and the yoke portion is restrained between the two second wall portions.

In another alternative, the yoke partition includes a hook portion protruding radially outward from the first wall portion, and the wire of the coil is hooked to the hook portion.

In another alternative, the hook portion is located at one axial side of the yoke portion, the second wall portion separates the hook portion and the yoke portion, the two hook portions are spaced apart in the circumferential direction, and the two end portions of the wire are respectively hung on the two hook portions.

The application also provides a motor comprising: the motor stator described above; and a rotor.

By adopting the technical scheme, the annular array can have smaller roundness error by arranging the convex part and the concave part, so that the annular array is easy to be pressed into the carrier. Further, by providing the convex portions and the concave portions to the insulating member, the magnetic circuit is not affected by the convex portions and the concave portions, as compared with the prior art, so that the stator core can have a smaller heat loss and a higher magnetic flux density.

Drawings

Fig. 1 shows a schematic view of a motor stator according to one embodiment of the present application.

Fig. 2 shows an exploded view of the motor stator of fig. 1.

Fig. 3 shows a partial view of the region B in fig. 2, in which the carrier is omitted.

Fig. 4 shows a split assembly of the motor stator of fig. 1.

Fig. 5 shows the insulating member of the split assembly of fig. 4.

Description of the reference numerals

1, splicing the components;

11 iron core blocks; a 111 boot; 112 yoke;

12 coils;

13 an insulating member; 131 tooth partitions; a 132 boot divider; 133 yoke partitions; 134 convex portions; 135 recesses; 136 a first wall portion; 137 a second wall portion; 138 hook portions; 13a fixing grooves;

2 a carrier;

aaxial direction; r is radial; c circumferential direction.

Detailed Description

Exemplary embodiments of the present application are described below with reference to the accompanying drawings. It should be understood that these specific descriptions are merely illustrative of how one skilled in the art may practice the present application and are not intended to be exhaustive of all of the possible ways of practicing the present application nor to limit the scope of the present application.

Fig. 1 to 5 show a motor stator, in particular a concentrated winding stator, according to an embodiment of the present application.

Referring to fig. 1 to 3, the motor stator may include a plurality of split assemblies 1 and a carrier 2.

Referring to fig. 4 and 5, the split assembly 1 may include a core block 11, a coil 12, and an insulating member 13. Specifically, the core block 11 may be made of a soft magnetic material, for example, silicon steel. The coil 12 may be a copper wire, which may be wound around the teeth of the core block 11. The insulating member 13 may be made of an insulating material, for example, may be made of plastic. The insulating member 13 may be sleeved on the core block 11, and may cover the core block 11 by injection molding, for example. The core block 11 and the coil 12 may be separated by an insulating member 13 such that the core block 11 and the coil 12 are insulated from each other.

The insulating member 13 may include a tooth partition 131, a shoe partition 132, and a yoke partition 133. Specifically, the tooth partition 131 may cover the tooth of the core block 11. The shoe partition 132 may be connected to a radially inner end of the tooth partition 131, and encase the shoe 111 of the core block 11 (see fig. 1 and 2). The yoke partition 133 may be connected to a radially outer end of the tooth partition 131, and cover the yoke 112 of the core block 11.

The tooth partition 131 may define a fixing groove 13a. Specifically, the fixing groove 13a may be provided at a circumferential end surface of the tooth partition 131. The fixing groove 13a may extend in the axial direction a and penetrate in the axial direction a. The plurality of fixing grooves 13a may be arranged side by side in the radial direction R. The fixing groove 13a may have a depth in the circumferential direction C, and the innermost wire of the coil 12 may be inserted into the fixing groove 13a so that the coil 12 is easily wound to the insulating member 13.

The yoke partition 133 may include a convex portion 134, a concave portion 135, a first wall portion 136, a second wall portion 137, and a hook portion 138.

The first wall 136 and the second wall 137 may encase the yoke 112. Specifically, the first wall portion 136 may be perpendicular to the radial direction R, and connected to a radially outer end portion of the tooth partition portion 131. The first wall 136 may be located radially inward of the yoke 112 such that the yoke 112 and the coil 12 are spaced apart. The second wall portion 137 may be perpendicular to the axial direction a and extend radially outward from the first wall portion 136. The two second wall portions 137 may be spaced apart in the axial direction a, and the yoke 112 may be restrained between the two second wall portions 137.

The convex portion 134 and the concave portion 135 may be provided to the second wall portion 137. Specifically, the convex portion 134 may be provided at one circumferential side end portion of the second wall portion 137, and convex to one circumferential side. The recess 135 may be provided at the other circumferential side end of the second wall portion 137 and recessed toward one circumferential side. The convex portion 134 and the concave portion 135 may be complementary in shape, for example, the convex portion 134 and the concave portion 135 may be formed in semicircular shapes having the same radius.

The wire of the coil 12 may be hooked to the hook 138. Specifically, the hook portion 138 may protrude radially outward from the first wall portion 136, and the two hook portions 138 may be spaced apart in the circumferential direction C. The hook 138 may be disposed at one axial side of the yoke 112, and the second wall 137 may separate the hook 138 and the yoke 112. The two ends of the wire of the coil 12 may be respectively hooked to the two hooks 138 such that the ends of the wire are fixed with the insulating member 13.

Referring to fig. 1 to 3, the split assembly 1 may be mounted on a carrier 2. Specifically, the plurality of split assemblies 1 may be arranged in an annular array along the circumferential direction C. For any two adjacent splice assemblies 1, the male portion 134 of one splice assembly 1 may be inserted into the female portion 135 of the other splice assembly 1 such that the two adjacent splice assemblies 1 are radially positioned relative to each other. The annular array may be integrally pressed into the carrier 2, for example, the annular array may be pressed into the carrier 2 by means of a jig, so that the carrier 2 is sleeved on the annular array. The annular array of the plurality of split assemblies 1 may be maintained as a single unit under the constraint of the carrier 2.

In this way, by providing the convex portion 134 and the concave portion 135, the annular array can have a small roundness error, so that the annular array is easily pressed into the carrier 2. Further, by providing the convex portion 134 and the concave portion 135 to the insulating member 13, the magnetic circuit is not affected by the convex portion 134 and the concave portion 135, so that the core block 11 can have a smaller heat loss and a higher magnetic flux density, as compared with the related art.

It will be appreciated that in embodiments of the present application, the circumferential end surface of the yoke 112 may be planar, i.e., without the above-described protrusions 134 and recesses 135.

Embodiments of the present application also provide a motor, which may be an inner rotor motor, which may include the motor stator and rotor described above.

It should be understood that the above-described embodiments are merely exemplary and are not intended to limit the present application. Those skilled in the art can make various modifications and changes to the above-described embodiments without departing from the scope of the present application.

It should be understood that the protrusion 134 of one insulating member 13 is not limited to be single, and may be plural, for example. The recess 135 of one insulating member 13 is not limited to a single one, and may be plural, for example. The convex portion 134 and the concave portion 135 on one insulating member 13 are not limited to be complementary in shape, and may be formed in different shapes, for example. The convex portion 134 and the concave portion 135 are not limited to being provided in the same second wall portion 137, and may be provided in different second wall portions 137, for example.

Claims

1. An electric motor stator comprising a plurality of split assemblies including core blocks, coils, and insulating members separating the core blocks and the coils, the plurality of split assemblies being arranged in an annular array along a circumferential direction of the electric motor stator, and a carrier that is sleeved and constrains the annular array, characterized in that,

the insulating members include a convex portion protruding to one circumferential side and a concave portion recessed to one circumferential side, the convex portion of one insulating member being inserted into the concave portion of the adjacent other insulating member such that the adjacent split assemblies are positioned with each other in the radial direction of the motor stator.

2. The motor stator of claim 1 wherein the male and female portions are complementary in shape.

3. The motor stator according to claim 2, wherein the convex portion and the concave portion are formed in a semicircle shape.

4. The motor stator according to any one of claims 1 to 3, wherein the core block includes a tooth portion, a shoe portion, and a yoke portion whose circumferential end surface is a plane,

the insulating member includes a tooth partition that partitions the tooth and the coil, a shoe partition that partitions the shoe and the coil, and a yoke partition that partitions the yoke and the coil.

5. The motor stator according to claim 4, wherein the tooth partition defines a fixing groove provided at a circumferential end face of the tooth partition, the fixing groove extending in an axial direction of the motor stator, a plurality of the fixing grooves being arranged side by side in the radial direction, the wire of the coil being embedded in the fixing groove.

6. The motor stator of claim 4 wherein the yoke spacer includes a first wall portion and a second wall portion,

the first wall portion being perpendicular to the radial direction and connected to a radially outer end portion of the tooth partition portion, the first wall portion being located radially inward of the yoke portion and partitioning the yoke portion and the coil, the second wall portion being perpendicular to an axial direction of the motor stator and extending radially outward from the first wall portion,

the convex portion is provided at one end portion in the circumferential direction of the second wall portion, and the concave portion is provided at the other end portion in the circumferential direction of the second wall portion.

7. The motor stator according to claim 6, wherein two of the second wall portions are spaced apart in the axial direction, the yoke portion being restrained between the two second wall portions.

8. The motor stator according to claim 6, wherein the yoke partition portion includes a hook portion protruding radially outward from the first wall portion, and the wire of the coil is hung on the hook portion.

9. The motor stator according to claim 8, wherein the hook portion is located at one axial side of the yoke portion, the second wall portion separates the hook portion and the yoke portion,

the two hooks are spaced apart in the circumferential direction, and both ends of the wire are respectively hung on the two hooks.

10. An electric machine, comprising:

the motor stator according to any one of claims 1 to 9; and

a rotor.