KR20190073880A - Stator and motor having the same - Google Patents

Abstract

The present invention relates to a stator and a motor including the same. According to an embodiment of the present invention, the stator comprises: a stator core; an insulator arranged in the stator core; and a coil wound on the insulator. The insulator includes: a main body on which the coil is wound; an internal guide protruding from the inside of the main body; an external guide protruding from the outside of the main body; and a protrusion formed in an internal side surface of the main body. Therefore, the motor closely contacts the coil to the insulator by using the protrusion, thereby preventing noise caused by a vibration of the coil.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a stator,

Embodiments relate to a stator and a motor including the stator.

A motor is a device that obtains rotational force by converting electrical energy into mechanical energy. It is widely used in automobiles, home electronics, and industrial devices.

The motor may include a housing, a shaft, a stator disposed on an inner circumferential surface of the housing, a rotor installed on an outer circumferential surface of the shaft, and the like. Here, the stator of the motor induces electrical interaction with the rotor to induce rotation of the rotor.

Here, the stator may include a stator core, a coil wound around the stator core, and an insulator disposed between the stator core and the coil.

When the coil is wound in a state where the insulator is disposed in the stator core, a tension phenomenon occurs in which one region of the coil is not brought into close contact with the side wall of the insulator due to the tension of the coil.

Accordingly, when a current is applied to the coil, the coil is shaken to generate noise.

The embodiment provides a stator and a motor for preventing the coil from shaking when a current is applied to the coil.

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

According to an embodiment of the present invention, there is provided a stator comprising: a stator core; An insulator disposed on the stator core; And a coil wound around the insulator, wherein the insulator includes a main body in which the coil is wound, an inner guide protruding from the inside of the main body, an outer guide protruding from the outside of the main body, And a stator.

Here, the stator core may include a yoke; And a plurality of teeth protruding radially from the yoke, wherein the protrusions can contact the side surfaces of the teeth.

The main body includes a plate portion and a side wall portion protruded from both side ends of the plate portion, and the protrusion can be disposed on an inner side surface of the side wall portion.

The protrusions may be spaced apart from the inner surface of the plate portion by a first spacing distance D1.

The protrusions may be spaced apart from each other by a second spacing D2 at one side edge of the side wall.

On the other hand, one side width W1 of the projection is smaller than the other side width W2.

According to an embodiment of the present invention, A stator disposed in the housing; A rotor disposed within the stator; A shaft engaged with the rotor; And a cover disposed on the housing, wherein the stator includes a stator core, an insulator disposed in the stator core, and a coil wound around the insulator, wherein the insulator includes a main body in which the coil is wound, An inner guide protruding from the inner side, an outer guide protruding from the outer side of the main body, and a protrusion formed on the inner side surface of the main body.

Here, the stator core includes a yoke and a tooth protruding radially from the yoke, and the protrusion may include a contact surface contacting the side surface of the tooth.

The side surface of the tooth and the inner surface of the main body may form a predetermined angle?.

The width W1 of the upper surface of the projection is smaller than the width W2 of the lower surface.

The contact surface may be in surface contact with the side surface of the tooth.

The stator according to the embodiment and the motor including the stator can prevent the noise generated by the shaking of the coil by closely contacting the coil with the insulator by using the protrusion formed on the insulator.

1 is a view showing a motor according to an embodiment,
2 is a view showing a stator of a motor according to an embodiment,
3 is a view showing a stator unit forming a stator disposed in a motor according to an embodiment,
4 is an exploded perspective view showing a stator core and an insulator of the stator disposed in the motor according to the embodiment,
5 is a perspective view showing an insulator of a motor according to an embodiment,
6 is a front view showing the insulator of the motor according to the embodiment,
Fig. 7 is a cross-sectional view showing the line BB in Fig. 4,
8 is a view showing an embodiment of a projection of an insulator contacting the stator core of the motor according to the embodiment,
9 is a view showing another embodiment of the protrusion of the insulator contacting the stator core of the motor according to the embodiment.

The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated and described in the drawings. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

The terms including ordinal, such as second, first, etc., may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the second component may be referred to as a first component, and similarly, the first component may also be referred to as a second component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

In the description of the embodiments, when an element is described as being formed "on or under" another element, the upper or lower (lower) (on or under) all include that the two components are in direct contact with each other or that one or more other components are indirectly formed between the two components. Also, when expressed as 'on or under', it may include not only an upward direction but also a downward direction based on one component.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings, wherein like or corresponding elements are denoted by the same reference numerals, and redundant description thereof will be omitted.

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

Referring to FIG. 1, the motor 1 according to the embodiment includes a housing 100 having an opening formed at one side thereof, a cover 200 disposed at an upper portion of the housing 100, a stator 200 disposed inside the housing 100, A shaft 400 that rotates together with the rotor 400 and a bus bar 600 that is disposed on the upper side of the stator 300 and a shaft 500 that is disposed on the upper side of the stator 300, And a sensor unit 700 for detecting rotation. Herein, the inside refers to a direction disposed toward the center C with respect to the center C, and the outside refers to a direction opposite to the inside.

The motor 1 may be a motor used in EPS. The EPS (Electronic Power Steering System) assists the steering force by the driving force of the motor, thereby ensuring the turning stability and providing the quick resilience to enable the driver to drive safely.

The housing (100) and the cover (200) can form the outer shape of the motor (1). The housing 100 and the cover 200 may be coupled to each other to form a receiving space. Accordingly, the stator 300, the rotor 400, the shaft 500, and the like may be disposed in the accommodation space, as shown in FIG. At this time, the shaft 500 is rotatably disposed in the accommodation space. The motor 1 may further include a bearing 10 disposed at the upper portion and the lower portion of the shaft 500, respectively.

The housing 100 may be formed in a cylindrical shape. The housing 100 can house the stator 300, the rotor 400, and the like. At this time, the shape and material of the housing 100 may be variously modified. For example, the housing 100 may be formed of a metal material that can withstand high temperatures.

The cover 200 may be disposed on the opening surface of the housing 100, that is, above the housing 100, so as to cover the opening of the housing 100.

The stator 300 may be disposed inside the housing 100. At this time, the stator 300 may be supported on the inner peripheral surface of the housing 100. The stator 300 is disposed outside the rotor 400. That is, the rotor 400 may be rotatably disposed inside the stator 300.

1, the stator 300 includes a stator core 310, a coil 320 wound around the stator core 310, and an insulator 330 disposed between the stator core 310 and the coil 320 can do.

FIG. 2 is a view showing a stator of a motor according to an embodiment, FIG. 3 is a view showing a stator unit forming a stator disposed in a motor according to an embodiment, and FIG. Fig. 3 is an exploded perspective view showing a stator core and an insulator.

2 to 4, the stator 300 may be formed of a plurality of stator units 300a. The stator unit 300a may include a stator core 310, a coil 320 wound around the stator core 310 and an insulator 330 disposed between the stator core 310 and the coil 320. [

2, the stator 300 of the motor 1 can be realized by disposing a plurality of stator units 300a along the circumferential direction.

The stator core 310 may be wound with a coil 320 forming a rotating magnetic field. Here, the stator core 310 may be formed of one core or a plurality of divided cores may be combined.

The stator core 310 may be formed by stacking a plurality of plates in the form of thin steel plates, but the present invention is not limited thereto. For example, the stator core 310 may be formed as a single unit.

Referring to FIG. 4, the stator core 310 may include an arc-shaped yoke 311 and a tooth 312. The tooth 312 may be formed to protrude radially from the yoke 311 for winding the coil 320. Here, the yoke 311 and the tooth 312 are integrally formed as an example, but the present invention is not limited thereto.

Meanwhile, the teeth 312 may be disposed so as to face the magnets of the rotor 400. The coil 320 is wound on each of the teeth 312.

At this time, the coil 320 may be wound on the insulator 330 disposed in the stator core 310. Then, the coil 320 can form a rotating magnetic field by power supply.

The insulator 330 insulates the stator core 310 and the coil 320. Accordingly, the insulator 330 may be disposed between the stator core 310 and the coil 320.

Thus, the coil 320 can be wound on the stator core 310 on which the insulator 330 is disposed.

3 and 4, the insulator 330 may be disposed on the tooth 312 of the stator core 310 to insulate the stator core 310 and the coil 320. [ Here, the insulator 330 may be formed of a resin material.

4, the insulator 330 includes an upper insulator 330a disposed on the upper and side surfaces 312a of the tooth 312, a lower insulator 330a disposed on the lower and side surfaces 312a of the tooth 312, ). Herein, the upper insulator 330a and the lower insulator 330a may be formed in the same shape. Hereinafter, the insulator 330 will be described with reference to the upper insulator 330a.

Fig. 5 is a perspective view showing the insulator of the motor according to the embodiment, Fig. 6 is a front view showing the insulator of the motor according to the embodiment, and Fig. 7 is a sectional view showing the line B-B in Fig.

5 to 7, the insulator 330 may include a body 331, an inner guide 334, an outer guide 335, and a projection 336. [ The main body 331 may include a side wall portion 333 extending in one direction (axial direction) at both side ends of the plate portion 332 and the plate portion 332. At this time, in the case of the upper insulator 330a, the plate portion 332 may be called an upper plate portion.

The insulator 330 may further include a groove 337 formed on an outer surface of the main body 331. Here, the grooves 337 may have a groove shape recessed in the plate portion 332 and the side wall portion 333. The groove 337 can guide the arrangement of the coil 320 when the coil 320 is wound.

The coil 320 may be wound on the main body 331.

The body 331 may be disposed on the tooth 312 of the stator core 310 to insulate the stator core 310 and the coil 320 from each other. The plate 332 of the body 331 may be disposed on the upper surface or the lower surface of the tooth 312 and the side surface 333 of the body 331 may be disposed on the side surface 312a of the tooth 312. [ As shown in Fig.

Referring to FIG. 5, the main body 331 may include a plate portion 332 and side wall portions 333 protruding to one side from both side ends of the plate portion 332. At this time, the projection 336 may be disposed on the inner side surface 333a of the side wall portion 333 and may be in contact with the side surface 312a of the tooth 312.

The inner guide 334 supports the coil 320 wound on the body 331 to prevent the coil 320 from falling inward.

The inner guide 334 can be disposed inside the main body 331. The inner guide 334 may be formed to protrude axially from the inside of the main body 331. Herein, the inside refers to the direction toward the center C with respect to the radial direction, and the outside refers to the inside opposite direction. The axial direction may be the longitudinal direction of the shaft 500.

The outer guide 335 supports the coil 320 wound on the body 331 to prevent the coil 320 from being deviated outwardly.

The outer guide 335 may be disposed outside the main body 331. The outer guide 335 may be formed to protrude in the axial direction from the outside of the main body 331.

The protrusions 336 may be disposed in contact with the teeth 312 of the stator core 310. As shown in Figs. 5 and 7, the projections 336 are formed in a rectangular parallelepiped shape, but are not limited thereto.

5, the protrusion 336 may be formed on the inner surface 333a of the side wall portion 333. [ The contact surface 336a of the projection 336 contacts the side surface 312a of the tooth 312 when the insulator 330 is disposed in the stator core 310. [ Accordingly, the side wall portion 333 may be disposed such that the end portion thereof is widened with respect to the tooth 312.

Since the projections 336 are respectively disposed on the pair of side wall portions 333, as shown in Fig. 6, the two projections 336 can be arranged to face each other.

6 and 7, the upper surface 336b of the projection 336 is disposed at a first spacing distance D1 from the inner surface 332a of the plate portion 332. [ Here, when the insulator 330 is the upper insulator 330a, the inner surface 332a may be the lower surface of the plate portion 332 of the upper insulator 330a.

Referring to FIG. 7, the protrusions 336 may be spaced apart from the one side edge of the side wall portion 333 by a second spacing distance D2. Here, the protrusions 336 are disposed to be spaced apart from the one side edge of the side wall portion 333 by the second spacing distance D2, but the present invention is not limited thereto. For example, along the inner surface 333a of the side wall portion 333 in the radial direction.

8 is a view showing an embodiment of a protrusion of an insulator contacting the stator core of the motor according to the embodiment. Here, FIG. 8 is a conceptual diagram showing the contact relationship between the teeth of the stator core and the protrusions of the insulator, which is taken along line A-A of FIG.

8, as the projection 336 contacts the side surface 312a of the tooth 312, the width of the projection 336 causes the side surface 312a of the tooth 312 and the side surface 312b of the body 331, The inner side surface 333a of the protrusion 333 can form a predetermined angle?. Accordingly, when the coil 320 is wound, the outer side surface of the side wall portion 333 is in close contact with the coil 320, so that the noise generated by the vibration of the coil 320 can be prevented.

9 is a view showing another embodiment of the protrusion of the insulator contacting the stator core of the motor according to the embodiment. Here, FIG. 9 is a conceptual diagram showing the contact relationship between the teeth of the stator core and the protrusions of the insulator, which is taken along the line A-A in FIG.

9, the side surface 312a of the tooth 312 and the inner side surface 333a of the side wall portion 333 of the main body 331 form a predetermined angle? By the width of the projection 336 .

At this time, one side width W1 of the projection 336 may be smaller than the other side width W2. As shown in FIG. 9, since the width of one side W1 may increase toward the other side W2, the projection 336 may have a trapezoidal cross-section. Here, in the case of the upper insulator 330a, one side width W1 may be the width W1 of the upper side 336b of the projection 336. [ The other width W2 may be the width W2 of the lower surface 336c of the projection 336. [

The amount of contact between the contact surface 336a of the projection 336 and the side surface 312a of the tooth 312 is increased to effectively prevent the noise generated by the vibration of the coil 320. [

The rotor 400 may be disposed inside the stator 300. The shaft 500 may be coupled to the center.

The rotor 400 may include a magnet (not shown) coupled to a rotor core (not shown). For example, the rotor 400 may be of a type in which a magnet is disposed on the outer circumferential surface of the rotor core.

Therefore, the magnet forms a rotating magnetic field with the coil 320 wound around the stator 300. [ The magnet may be disposed such that the N pole and the S pole alternate along the circumferential direction about the shaft 500.

As a result, the rotor 400 rotates due to the electrical interaction between the coil 320 and the magnet, and when the rotor 400 rotates, the shaft 500 rotates and the driving force of the motor 1 is generated.

Meanwhile, the rotor core of the rotor 400 may be fabricated by combining a plurality of divided cores, or may be fabricated into a single core formed of a single cylinder. Here, the rotor core may be formed in a shape in which a plurality of plates in the form of a circular thin steel plate are laminated.

The shaft 500 can be rotatably supported inside the housing 100 by a bearing 10, as shown in Fig. The shaft 500 can rotate together with the rotation of the rotor 400.

The bus bar 600 may be disposed on the upper portion of the stator 300.

The bus bar 600 may be electrically connected to the coil 320 of the stator 300.

The bus bar 600 may include a bus bar body and a plurality of terminals disposed inside the bus bar body. Here, the bus bar body may be a mold material formed through injection molding. Each of the terminals may be electrically connected to the coil 320 of the stator 300.

The sensor unit 700 senses the magnetic force of the sensing magnet installed in a rotatable manner with respect to the rotor 400 and detects the rotation of the shaft 500 by sensing the current position of the rotor 400.

The sensor unit 700 may include a sensing magnet assembly 710 and a printed circuit board (PCB) 720.

The sensing magnet assembly 710 is coupled to the shaft 500 to cooperate with the rotor 400 to detect the position of the rotor 400. At this time, the sensing magnet assembly 710 may include a sensing magnet and a sensing plate. The sensing magnet and the sensing plate may be coupled to each other with a coaxial axis.

The sensing magnet may include a main magnet disposed in the circumferential direction adjacent to the hole forming the inner circumferential surface and a sub magnet formed at the edge. The main magnet can be arranged in the same manner as the drive magnet inserted in the rotor 400 of the motor. The submagnet is divided into more poles than the main magnet. As a result, it is possible to measure the rotational angle more finely and measure it, and it is possible to smoothly drive the motor

The sensing plate may be formed of a disc-shaped metal material. A sensing magnet may be coupled to the upper surface of the sensing plate. And the sensing plate may be coupled to the shaft 500. Here, a hole through which the shaft 500 penetrates is formed in the sensing plate.

A sensor for sensing the magnetic force of the sensing magnet may be disposed on the printed circuit board 720. At this time, the sensor may be provided as a Hall IC. The sensor may generate a sensing signal by detecting a change in the N and S poles of the sensing magnet.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the appended claims. It will be understood that the present invention can be changed. It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

1: motor
100: Housing
200: cover
300: stator 310: stator core
320: Coil
330 insulator 321 body
332: plate portion 333: side wall portion
334: Inner guide 335: Outer guide
336: projection
400: Rotor
500: Shaft
600: bus bar
700:

Claims (11)

Stator core;
An insulator disposed on the stator core; And
A coil wound around the insulator,
The insulator
A main body in which the coil is wound,
An inner guide protruding from the inside of the main body,
An outer guide projecting from the outside of the main body;
And a projection formed on an inner surface of the body. The method according to claim 1,
The stator core
York and
And a plurality of teeth protruding in the radial direction from the yoke,
And the projection is in contact with a side surface of the tooth. 3. The method of claim 2,
Wherein the main body includes a plate portion and side wall portions extending from both side ends of the plate portion,
And the projection is disposed on an inner side surface of the side wall portion. The method of claim 3,
And the projections are spaced apart from each other by a first spacing distance (D1) from an inner surface of the plate portion. 5. The method of claim 4,
Wherein the protrusions are spaced apart from each other by a second spacing distance (D2) at one side edge of the side wall portion. The method according to any one of claims 1 to 5,
And one side width W1 of the projection is smaller than the other side width W2. housing;
A stator disposed in the housing;
A rotor disposed within the stator;
A shaft engaged with the rotor; And
And a cover disposed on the housing,
The stator
Stator core,
An insulator disposed in the stator core, and
A coil wound around the insulator,
The insulator
A main body in which the coil is wound,
An inner guide protruding from the inside of the main body,
An outer guide projecting from the outside of the main body;
And a protrusion formed on an inner surface of the body. 8. The method of claim 7,
Wherein the stator core includes a yoke and a tooth projecting radially from the yoke,
The protrusion including a contact surface that contacts a side of the tooth. 9. The method of claim 8,
Wherein the side surface of the tooth and the inner surface of the body form a predetermined angle?. 10. The method of claim 9,
And the width W1 of the upper surface of the projection is smaller than the width W2 of the lower surface. 11. The method of claim 10,
And the contact surface is in surface contact with the side surface of the tooth.

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