KR20180017642A - Stator core, stator and motor having the same - Google Patents

Abstract

The present invention provides a stator core which includes: a yoke; and a plurality of teeth protruding from an inner side of the yoke. The yoke includes a groove part arranged on the inner side. The groove part is arranged in the middle of the adjacent teeth based on a circumferential direction. The performance and durability of a motor can be secured by preventing a contact between the yoke and a coil transferred to adjacent unit cores in a winding process.

Description

[0001] The present invention relates to a stator core, a stator and a motor including the stator core,

Embodiments relate to a stator core, a stator and a motor including the same.

The stator core may include a plurality of divided unit cores. The deployed stator can be made such that the plurality of unit cores are connected to each other. The coil is wound with the unit cores deployed, and one coil can be wound on several unit cores.

At this time, the coil can be brought into contact with the edge portion of the yoke of the unit core and can be released. When the coil is molten and comes into contact with the unit core, the performance of the motor is greatly deteriorated.

The stator core may include a plurality of divided unit cores. The deployed stator can be made such that the plurality of unit cores are connected to each other. The coil is wound with the unit cores deployed, and one coil can be wound on several unit cores.

At this time, the coil can be brought into contact with the edge portion of the yoke of the unit core and can be released. When the coil is molten and comes into contact with the unit core, the performance of the motor is greatly deteriorated.

Accordingly, it is an object of the invention to provide a stator core, a stator, and a motor including the stator core, which can prevent a coil from being escaped by a yoke of a stator core during a winding operation of the coil in a deployed stator.

The problems to be solved by the embodiments are not limited to the above-mentioned problems, and other problems not mentioned here can be clearly understood by those skilled in the art from the following description.

The yoke includes a plurality of teeth protruding from an inner surface of the yoke. The yoke includes a groove portion disposed on the inner side surface, It is possible to provide the stator core disposed in the middle between the neighboring teeth.

The plurality of unit cores preferably include a plurality of unit cores including the yoke and the teeth, and the plurality of unit cores may be connected to each other through a connecting portion.

Preferably, the yoke of the unit core includes an outer surface, an inner surface, a side surface connecting the outer surface and the inner surface, and the connection portion may be disposed on the outer surface and the side surface.

Preferably, the side surface includes a first surface and a second surface, the first surface is connected to the connection portion, the second surface is connected to the first surface and the inner surface, When the centers of curvature radii of the end faces of the teeth of the core coincide with each other, the first faces of the neighboring unit cores may be in contact with each other and the second faces may be apart from each other.

Preferably, the groove portion may include the second surface of the neighboring unit core.

Preferably, the second surface may include a second-first surface folded at the first surface and a second-second surface bent at the second-first surface and connected to the inner surface.

According to another aspect of the present invention, there is provided a stator core including a stator core, an insulator coupled to the stator core, and a coil wound around the insulator, wherein the stator core includes a yoke and a plurality of And the yoke includes a groove portion disposed on the inner side surface, and the groove portion can be disposed in the middle between the neighboring teeth with respect to the circumferential direction.

The plurality of unit cores preferably include a plurality of unit cores including the yoke and the teeth, and the plurality of unit cores may be connected to each other through a connecting portion.

Preferably, the insulator is coupled to each of the plurality of unit cores, and one of the coils is wound on at least two of the insulators.

Preferably, the yoke of the unit core includes an outer surface, an inner surface, and a side surface connecting the outer surface and the inner surface, and the connection portion may be disposed over the outer surface and the side surface.

Preferably, the side surface includes a first surface and a second surface, the first surface is connected to the connection portion, the second surface is connected to the first surface and the inner surface,

When the centers of curvature radii of the end faces of the teeth of the plurality of unit cores coincide with each other, the first faces of the neighboring unit cores may be in contact with each other and the second faces may be apart from each other.

Preferably, the insulator may cover the second surface.

According to another aspect of the present invention for achieving the above object, there is provided a stator including a rotor including a rotating shaft, a hole in which the rotating shaft is disposed, and a stator disposed outside the rotor, Wherein the stator core includes a yoke and a plurality of teeth protruding from an inner surface of the yoke, the yoke including a groove portion disposed on the inner side surface, And the groove portion may be disposed in the middle between the neighboring teeth with respect to the circumferential direction.

According to the embodiment, the grooves are formed on the inner surface of the yoke of the stator core to prevent the coil and the yoke from contacting each other in the adjacent unit cores during the winding process, thereby securing the performance and durability of the motor to provide.

1 shows a motor according to an embodiment,
2 is a view showing a developed state of the stator,
Fig. 3 is an enlarged view of the stator shown in Fig. 2,
4 is a view showing a stator core,
5 is a view showing an insulator covering the groove portion.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS The objectives, specific advantages, and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. The terms and words used in the present specification and claims should not be construed to be limited to ordinary or dictionary terms and the inventor should properly define the concept of the term in order to describe its own invention in the best way. The present invention should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

1 is a view showing a motor according to an embodiment.

Referring to Fig. 1, the motor may include a stator 10, a rotating shaft 20, and a rotor 30.

A rotor (30) is disposed inside the stator (10). The rotor 30 includes a hole through which the rotating shaft 20 passes. A coil is wound around the stator 10 to have a magnetic pole, and the rotor 30 is rotated by the magnetic field formed by the winding of the coil and the rotating shaft 20 is rotated at the same time.

A bus bar (1) may be provided on the stator (10). The bus bar 1 is for connecting coils arranged in parallel, and is electrically connected to the coils. The bus bar 1 is provided with an annular body made of an insulating material and terminals connected to the coil are provided on the body. The bus bar (1) can supply electricity to the coil through a power terminal connected to the terminal and supplied with external power of different polarity.

The rotor (30) is disposed inside the stator (10). The rotor 30 may be constructed by coupling a magnet to the rotor core, and in some cases, the rotor core and the magnet may be integrally formed. Further, the rotor 30 may be of a type in which the magnet is coupled to the outer circumferential surface of the rotor core, or may be of a type in which the magnet is inserted into the pocket of the rotor core.

The rotary shaft 20 may be formed integrally with the worm shaft 2. Here, the worm shaft 2 can be arranged to be engaged with the worm wheel 3. The worm wheel 3 rotates in conjunction with the rotation of the rotary shaft 20. When the worm wheel 3 is rotated, a driving force necessary for the vehicle can be provided. At this time, the required driving force of the vehicle may be a driving force for braking.

Fig. 2 is a view showing the developed state of the stator, and Fig. 3 is an enlarged view of the stator shown in Fig.

2 and 3, the stator 10 may include a stator core 100, an insulator 200, and a coil 300.

The stator core 100 may include a plurality of unit cores 100A, 100B, and 100C. Each of the unit cores 100A, 100B, and 100C includes a yoke 110 and a tooth 120. [ The yokes 110 of the unit cores 100A, 100B, and 100C are connected to each other. The yokes 110 of the unit cores 100A, 100B, and 100C are gathered to form an annulus. The teeth 120 protrude from the inner surface of the yoke 110. The coil 120 is wound with a coil. The unit cores 100A, 100B, and 100C may be formed by stacking a plurality of plates in the form of a thin steel plate.

The insulator 200 surrounds the unit cores 100A, 100B, and 100C, respectively. The insulator 200 insulates the unit cores 100A, 100B, and 100C and the coil 300 from energization. On the insulator 200, the coil 300 is wound.

The coil 300 is wound around the insulator 200 in a state in which a plurality of unit cores 100A, 100B, and 100C are deployed. At this time, one coil 300 may be wound around several unit cores 100A, 100B, and 100C. Therefore, when the winding of the coil 300 is completed in any unit core 100A, the coil 100A passes to the next unit core 100B adjacent to the unit core 100A, and the winding proceeds. At this time. The yoke 110 of the unit cores 100A and 100B and the coil 300 falling over can contact with each other and the stator core 100 according to the embodiment eliminates the risk through the groove 111. [

4 is a view showing a stator core.

Referring to FIG. 4, the yoke 110 may include an inner surface 112, an outer surface 113, and a side surface 114. A tooth 120 protrudes from the inner side surface 112. The side surface 114 is a portion connecting the outer side surface 113 and the inner side surface 112. The neighboring unit cores 100A, 100B, and 100C are connected to each other through a connection portion 115 disposed on the side surface 114, respectively.

The yoke 110 of the unit cores 100A, 100B, and 100C includes a groove 111. [ The groove portion 111 provides a space for blocking the contact between the coil 300 and the yoke 110 that pass to the neighboring next unit core 100B. The groove portion 111 is disposed on the inner side surface 112.

As an example, the side surface 114 may include a first side 114a and a second side 114b. The first surface 114a is a surface that abuts against each other, and the second surface 114b is a surface that forms a groove portion 111 apart from each other. The first surface 114a is connected to the connecting portion 115. [ The second side 114b starts from the first side 114a and extends to the inner side 112. [ When the plurality of unit cores 100A, 100B and 100C are gathered such that the center of curvature radius of the end face 120 of the teeth 120 is the same, in other words, after the winding operation is completed, When the unit cores 100A, 100B and 100C are gathered so that the end face 120 is rounded, the first faces 114a of the neighboring unit cores 100A, 100B and 100C are in contact with each other. On the other hand, when the first surfaces 114a come into contact with each other, the second surfaces 114b of the neighboring unit cores 100A, 100B, and 100C are separated from each other to form the troughs 111. [ The space formed by the groove portion 111 is a space for blocking the contact between the coil 300 and the yoke 110.

As an example, the second surface 114b may include a second-first surface 114ba and a second-second surface 114bb. The second-first surface 114ba is bent at the first surface 114a and the second-second surface 114bb is bent at the second-first surface 114ba to extend to the inner surface 112. [

5 is a view showing an insulator covering the groove portion.

As shown in Fig. 5, the insulator 200 covers the second surface 114b. Accordingly, the coil 300 approaching the first surface 114a is physically cut off during the winding process, thereby preventing the coil 300 from being molten.

The stator core, the stator, and the motor according to a preferred embodiment of the present invention have been specifically described with reference to the accompanying drawings.

It will be apparent to those skilled in the art that various modifications, changes, and substitutions are possible, without departing from the essential characteristics and spirit of the invention as disclosed in the accompanying claims. will be. Therefore, the embodiments disclosed in the present invention and the accompanying drawings are intended to illustrate and not to limit the technical spirit of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments and the accompanying drawings . The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

10:
20:
30: Rotor
100: stator core
110: York
111: Groove
112: My side
113: Outer side
114: side surface
114a: first side
114b; Second side
115: Connection
120: Teeth
100A, 100B, 100C: unit core

Claims (13)

Yoke; and
And a plurality of teeth protruding from an inner surface of the yoke,
The yoke
And a groove portion disposed on the inner side surface
Wherein the groove portion is disposed in the middle between the neighboring teeth with respect to the circumferential direction. The method according to claim 1,
And a plurality of unit cores including the yoke and the teeth,
And the plurality of unit cores are connected to each other through a connecting portion. 3. The method of claim 2,
The yoke of the unit core
An outer side surface, an inner side surface, and a side surface connecting the outer side surface and the inner side surface,
And the connecting portion is disposed over the outer side surface and the side surface. The method of claim 3,
The side surface including a first side and a second side,
Wherein the first surface is connected to the connection portion,
The second surface is connected to the first surface and the inner surface,
When the centers of curvature radii of the end faces of the teeth of the plurality of unit cores coincide with each other,
Wherein the first surfaces of adjacent unit cores abut against each other and the second surfaces are disposed apart from each other. 5. The method of claim 4,
[0028]
And the second side of the adjacent unit core. 6. The method of claim 5,
The second surface
And a second-2 surface folded at the first surface and bent at the second-first surface and connected to the inner surface. Stator core;
An insulator coupled to the stator core;
A coil wound around the insulator,
The stator core includes:
Yoke; and
And a plurality of teeth protruding from an inner surface of the yoke,
The yoke
And a groove portion disposed on the inner side surface
Wherein the groove portion is disposed in the middle between the neighboring teeth with respect to the circumferential direction. 8. The method of claim 7,
And a plurality of unit cores including the yoke and the teeth,
And the plurality of unit cores are connected to each other through a connecting portion. 9. The method of claim 8,
Wherein the insulator is coupled to each of the plurality of unit cores,
And one of said coils is wound on at least two of said insulators. 10. The method of claim 9,
The yoke of the unit core
An outer side surface, an inner side surface, and a side surface connecting the outer side surface and the inner side surface,
And the connecting portion is disposed over the outer side surface and the side surface. 11. The method of claim 10,
The side surface including a first side and a second side,
Wherein the first surface is connected to the connection portion,
The second surface is connected to the first surface and the inner surface,
When the centers of curvature radii of the end faces of the teeth of the plurality of unit cores coincide with each other,
Wherein the first surfaces of the adjacent unit cores abut against each other and the second surfaces abut against each other. 12. The method of claim 11,
And the insulator covers the second surface. A rotating shaft;
A rotor including a hole in which the rotation axis is disposed; And
And a stator disposed outside the rotor,
The stator includes:
Stator core;
An insulator coupled to the stator core;
A coil coupled to the insulator,
The stator core includes:
Yoke; and
And a plurality of teeth protruding from an inner surface of the yoke,
The yoke
And a groove portion disposed on the inner side surface
Wherein the groove portion is disposed in the middle between the neighboring teeth with respect to the circumferential direction.

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