KR102500989B1 - Insulator, stator and motor having the same - Google Patents

Abstract

The present invention is a coil winding body; An insulator for a motor including an inner guide formed on the inside of the body; and an outer guide formed on the inside of the body, and including a dripping space expansion groove formed concavely on an inner circumferential surface of the outer guide and in which a coil is seated. Thus, an advantageous effect of preventing coils wound on adjacent stator teeth from coming into contact with each other in a limited winding space is provided.

Description

Insulator for motor, stator and motor including the same {Insulator, stator and motor having the same}

One embodiment relates to an insulator for a motor, a stator, and a motor including the same.

In the case of the motor, a shaft formed to be rotatable, a rotor coupled to the shaft, and a stator fixed inside the housing are provided, and the stator is installed with a gap along the circumference of the rotor. In addition, a coil forming a rotating magnetic field is wound around the stator to induce electrical interaction with the rotor, thereby inducing rotation of the rotor.

The stator may include a plurality of stator cores, and the stator core may be configured by stacking steel plates including a plurality of teeth. A winding space is formed between each tooth, and a coil is wound around each tooth. At this time, an insulator is mounted on the teeth to insulate the coil from the stator coil.

In general, in order to increase the performance of a motor, it is necessary to increase the number of coil windings in the winding space or increase the diameter of the coil. However, the winding space formed between the teeth of the stator has a limited size.

In particular, when the size of the stator is reduced in line with the weight reduction trend, the winding space can be further reduced. When the winding space is reduced, coils wound on adjacent teeth may contact each other, adversely affecting the performance of the motor.

Accordingly, the present invention is to solve the above problems, and to provide a motor insulator, a stator, and a motor including the same that can prevent coils wound on adjacent stator teeth from contacting each other in a limited winding space. to be

The problem to be solved by the present invention is not limited to the above-mentioned problems, and other problems not mentioned herein will be clearly understood by those skilled in the art from the following description.

The present invention for achieving the above object includes a body around which a coil is wound, an inner guide formed inside the body, and an outer guide formed inside the body, and is formed concavely on an inner circumferential surface of the outer guide, It is possible to provide an insulator for a motor including a drip space expansion groove in which a coil is seated.

Preferably, the coil is composed of a bottom layer in contact with the body and a plurality of winding layers sequentially stacked and wound on the bottom layer, and the dropping space expansion groove is formed along an inner circumferential surface of the inner guide. Based on the radial direction of the circle, the outermost coil of any one of the plurality of winding layers may be seated in the drip space expansion groove and positioned outside the outermost coil of the bottom layer.

Preferably, the body is formed concavely and may include a seating groove in which the coil forming the bottom layer of the coil is seated.

Preferably, an outermost coil of a second layer among the winding layers may be seated in the drop space expansion groove based on a radial direction of an imaginary circle formed along an inner circumferential surface of the inner guide.

Preferably, a coil support portion protruding from an outer circumferential surface of the inner guide and contacting the innermost coil of the first layer of the winding layer may be included.

Another invention for achieving the above object is a stator core including a plurality of teeth, a body surrounding the teeth and around which a coil is wound, an inner guide formed on the inside of the body, and an outer guide formed on the inside of the body The stator may include a guide, and the outer guide is concavely formed on an inner circumferential surface and includes a dropping space expansion groove in which a coil is seated.

Preferably, as a stator, the coil is composed of a bottom layer in contact with the body and a plurality of winding layers sequentially stacked and wound on the bottom layer, and the dropping space expansion groove is formed along an inner circumferential surface of the inner guide. Based on the radial direction of an imaginary circle, the outermost coil of any one of the plurality of winding layers may be seated in the drip space expansion groove and positioned outside the outermost coil of the bottom layer. .

Preferably, as a stator, the body is formed concavely and may include a groove in which a coil forming a bottom layer of the coil is seated.

Preferably, as a stator, an outermost coil of a second layer among the winding layers may be seated in the drop space expansion groove based on a radial direction of an imaginary circle formed along an inner circumferential surface of the inner guide.

Preferably, the stator may include a coil support portion protruding from an outer circumferential surface of the inner guide and contacting the innermost coil of the first layer of the winding layer.

Preferably as a stator, the stator core may be composed of a plurality of split cores including each of the teeth.

Another invention for achieving the above object is a stator core including a plurality of teeth, a body surrounding the teeth and winding a coil, an inner guide formed inside the body, and an outer side formed inside the body It is possible to provide a motor including a stator including a guide and including a dropping space expansion groove formed concavely on an inner circumferential surface of the outer guide and in which a coil is seated, a rotor disposed inside the stator, and a shaft coupled to the rotor. there is.

Preferably, as a motor, the coil is composed of a bottom layer in contact with the body and a plurality of winding layers sequentially stacked and wound on the bottom layer, and the dropping space expansion groove is formed along an inner circumferential surface of the inner guide. Based on the radial direction of an imaginary circle, the outermost coil of any one of the plurality of winding layers may be seated in the drip space expansion groove and positioned outside the outermost coil of the bottom layer. .

Preferably, as a motor, the body is formed concavely and may include a groove in which a coil forming a bottom layer of the coil is seated.

Preferably, an outermost coil of a second layer among the winding layers may be seated in the drip space expansion groove based on a radial direction of an imaginary circle formed along an inner circumferential surface of the inner guide as a motor.

Preferably, the motor may include a coil support portion protruding from an outer circumferential surface of the inner guide and contacting an innermost coil of a first layer of the winding layer.

Preferably, as a motor, the stator core may be composed of a plurality of split cores including each of the teeth.

According to one embodiment of the present invention, the drip space expansion groove is provided on the inner circumferential surface of the outer guide, thereby providing an advantageous effect of preventing coils wound on adjacent stator teeth from coming into contact with each other in a limited winding space.

In addition, according to one embodiment of the present invention, the coil support portion protrudes from the outer circumferential surface of the inner guide and contacts the innermost coil of the first layer of the winding layer of the coil, leading the coil to the drip space expansion groove and By securing the supporting force, an advantageous effect of preventing coils wound on adjacent stator teeth from contacting each other due to external force or vibration is provided.

1 is a view showing a motor according to a preferred embodiment of the present invention;
2 is a view showing an insulator of the motor shown in FIG. 1;
3 is a view showing a stator core with a coil wound;
4 is a view explaining the position of the drip space expansion groove;
5 is a view showing a coil support;
6 is a view showing a separation space between coils wound on adjacent stator teeth.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments taken in conjunction with the accompanying drawings. And the terms or words used in this specification and claims should not be construed as being limited to ordinary or dictionary meanings, and the inventor appropriately defines the concept of terms in order to explain his/her invention in the best way. Based on the principle that it can be done, it should be interpreted as meaning and concept consistent with the technical spirit of the present invention. And, in describing the present invention, detailed descriptions of related known technologies that may unnecessarily obscure the subject matter of the present invention will be omitted.

1 is a view showing a motor according to a preferred embodiment of the present invention.

Referring to FIG. 1 , a motor according to a preferred embodiment of the present invention may include a stator 10, a rotor 20, and a shaft 30.

The stator 10 may include a plurality of stator cores (200 in FIG. 3). In one embodiment, the stator core 200 is formed by stacking a plurality of steel plates including an annular yoke portion and tooth portions disposed along the circumferential direction and protruding radially inward from the yoke at regular intervals. can be configured. A coil 40 forming a rotating magnetic field may be wound around these teeth. At this time, the coil 40 may be insulated through the insulator 100 .

The stator core 200 may be composed of a plurality of split cores each including teeth.

The insulator 100 is coupled to the upper and lower sides of the stator core 200, respectively, and serves to insulate the coil 40 wound around the teeth from being energized with the stator core 200. The insulator 100 may be formed of a resin material.

The rotor 20 is disposed inside the stator 10. The rotor 20 may be configured by coupling a magnet to the rotor core, or in some cases, the rotor core and the magnet may be integrally configured. In addition, the rotor 20 may be configured in a type in which a magnet is coupled to an outer circumferential surface of the rotor core or a type in which a magnet is inserted into a pocket of the rotor core. On the upper side of the rotor 20, a sensing magnet for acquiring position information of the rotor 20 may be coupled to a plate and installed, or a similar rotor position sensing means may be installed.

When current is supplied to the coil 40 wound around the stator 10, rotation of the rotor 20 is induced by causing electrical interaction with the rotor 20. When the rotor 20 rotates, the shaft 30 rotates to provide power.

FIG. 2 is a view showing an insulator of the motor shown in FIG. 1, and FIG. 3 is a view showing a stator core in which a coil is wound. 2 and 3 clearly show only the main features in order to clearly understand the present invention conceptually, and as a result, various modifications of the diagram are expected, and the scope of the present invention is extended by the specific shapes shown in the drawings. It doesn't have to be limited.

Referring to FIGS. 2 and 3 , the insulator 100 may be mounted on a tooth protruding from the stator core 200 . The insulator 100 serves to insulate the coil 40 from being energized with the stator core 200 .

The insulator 100 may include a body 110, an inner guide 120, and an outer guide 130. An inner guide 120 is provided on the inside of the body 110, and an outer guide 130 is provided on the outside of the body 110.

A coil 40 is wound around the body 110 . In addition, a droplet space expansion groove 140 may be formed in the inner guide 120 , and a seating groove 150 may be formed in the body 110 .

The dripping space expansion groove 140 and the seating groove 150 are places where the coil 40 is seated during the winding process. The dripping space expansion groove 140 and the seating groove 150 are formed concavely and serve to guide the winding of the coil 40 .

The size, interval, and number of the dripping space expansion groove 140 and the seating groove 150 may be set differently according to the diameter and the number of windings of the coil 40 .

The coil 40 may be stacked and wound around the insulator 100 in several layers through winding. If the coil 40 is largely divided in a winding state, it can be divided into a bottom layer 41 and a winding layer 42.

The bottom layer 41 corresponds to a layer that is wound by directly contacting the seating groove 150 formed in the body 110 .

The winding layer 42 corresponds to a plurality of layers 42a, 42b, and 42c sequentially stacked on the bottom layer 41 by an additional winding operation after the bottom layer 41 is formed.

4 is a view explaining the location of the drop space expansion groove.

4 and 5, the drip space expansion groove 140 is formed in the outer guide 130 of the insulator 100, and the winding layers 42 of the coil 40 (42a, 42b, 42c) are seated.

At this time, the center of an imaginary circle formed along the inner circumferential surface of the inner guide 120 of the insulator 100 is referred to as C in FIG. direction), the distance to the outermost coil C1 of the bottom layer 41 is referred to as R1 in FIG. 4, and any one of the winding layers 42: 42a, 42b, 42c, For example, among the winding layers 42 (42a, 42b, 42c), the distance to the outermost coil C2 of the winding layer 42b of the second layer is referred to as R2 in FIG. 4 .

The dripping space expansion groove 140 may be formed on the outer guide 130 of the insulator 100 so that R2 is greater than R1.

When the winding layers 42 (42a, 42b, 42c) are three layers, the position of the coil of the winding layer 42b located directly below the winding layer 42c located on the uppermost layer is in contact with the coil wound on the adjacent stator tooth has a great influence on whether

For example, the number of windings of the coil of the winding layer 42b of the second layer or the position of the coil affects the position of the coil of the winding layer 42c of the third layer. When the number of windings of the coil of the second layer winding layer 42b is small or the position of the coil is located in the radial direction, the coil of the third layer winding layer 42c is wound on an adjacent stator tooth This is because the probability of contact with

Specifically, as shown in FIG. 4, since the winding space is narrower as it goes inward relative to the radial direction, the position of the coil of the winding layer 42b of the second layer is located inward, so that the adjacent stator teeth There is a high risk of contact with the wound coil.

Since the drop space expansion groove 140 expands the winding space of the coil of the second layer winding layer 42b, the number of windings of the coil of the second layer winding layer 42b is increased, and the position of the coil is moved in the radial direction. By positioning it outward as much as possible based on , it serves to greatly reduce the risk of contact with the coil wound on the adjacent stator teeth.

FIG. 5 is a view showing a coil support, and FIG. 6 is a view showing a separation space between coils wound on adjacent stator teeth.

Referring to FIG. 5 , the insulator 100 may include a coil support 160 .

The coil support 160 protrudes from the outer circumferential surface of the inner guide 120 of the insulator 100 and serves to support the coil 40 .

For example, the coil support part 160 may support the coil C3 positioned at the innermost angle among the coils of the winding layer 42a of the first layer. The coil support 160 serves to reduce gaps in the winding space in the winding layer 42a of the first layer and increase the number of turns of the coil by pushing and supporting the coil C3 outward in the radial direction.

In this way, since the separation space as shown in A and B of FIG. 6 is secured through the drip space expansion groove 140 and the coil support 160, the winding process or external force or vibration causes the stator teeth to be wound adjacent to each other. The risk of contact with the coil can be greatly reduced.

In the above, the insulator for a motor according to one preferred embodiment of the present invention, the stator, and a motor including the same have been examined in detail with reference to the accompanying drawings.

The above description is merely an example of the technical idea of the present invention, and those skilled in the art can make various modifications, changes, and substitutions without departing from the essential characteristics of the present invention. will be. Therefore, the embodiments disclosed in the present invention and the accompanying drawings are not intended to limit the technical idea of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these embodiments and the accompanying drawings. . The protection scope of the present invention should be construed according to the claims below, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

10: stator
20: rotor
30: shaft
40: coil
41: bottom layer
42: winding layer
100: insulator
110: body
120: inner guide
130: outer guide
140: drop space expansion home
150: seating groove
160: coil support
200: stator core

Claims (17)

A body in which the coil is wound;
An inner guide formed inside the body; And
Including an outer guide formed on the inside of the body,
A drip space expansion groove formed concavely on an inner circumferential surface of the outer guide and in which a coil is seated,
The coil is composed of a bottom layer in contact with the body and a plurality of winding layers sequentially stacked and wound on the bottom layer,
A coil support portion contacting the innermost coil of the first layer of the winding layer,
The coil support part protrudes from an outer circumferential surface of the inner guide in a direction from the inner guide toward the outer guide. According to claim 1,
In the drip space expansion groove, the outermost coil of one of the plurality of winding layers is seated in the drop space expansion groove based on the radial direction of a virtual circle formed along the inner circumferential surface of the inner guide. An insulator for a motor formed to be located outside the outermost coil of the bottom layer. According to claim 2,
The body is formed concavely and includes a seating groove in which a coil forming a bottom layer of the coil is seated. According to claim 3,
Based on the radial direction of a virtual circle formed along the inner circumferential surface of the inner guide,
The insulator for a motor in which an outermost coil of a second layer among the winding layers is seated in the drop space expansion groove. delete A stator core including a plurality of teeth;
It includes a body surrounding the tooth and around which the coil is wound, an inner guide formed inside the body, and an outer guide formed inside the body, wherein the outer guide is formed concavely on an inner circumferential surface to which the coil is seated. Including a space expansion groove,
The coil is composed of a bottom layer in contact with the body and a plurality of winding layers sequentially stacked and wound on the bottom layer,
A coil support portion contacting the innermost coil of the first layer of the winding layer,
The stator, wherein the coil support portion protrudes from an outer circumferential surface of the inner guide in a direction from the inner guide toward the outer guide. According to claim 6,
In the drop space expansion groove, the outermost coil of one of the plurality of winding layers is seated in the drop space expansion groove based on the radial direction of an imaginary circle formed along the inner circumferential surface of the inner guide. A stator formed to be located outside the outermost coil of the bottom layer. According to claim 7,
The stator body is formed concavely and includes a groove in which a coil forming a bottom layer of the coil is seated. According to claim 8,
Based on the radial direction of a virtual circle formed along the inner circumferential surface of the inner guide,
A stator in which an outermost coil of a second layer among the winding layers is seated in the drop space expansion groove. delete According to claim 6,
The stator core is composed of a plurality of divided cores including each of the teeth. A stator core including a plurality of teeth, a body surrounding the teeth and around which a coil is wound, an inner guide formed inside the body, and an outer guide formed inside the body, and a concave inner circumferential surface of the outer guide a stator that is formed to include a drip space expansion groove in which a coil is seated;
A rotor disposed inside the stator; And
Shaft coupled to the rotor
including,
The coil is composed of a bottom layer in contact with the body and a plurality of winding layers sequentially stacked and wound on the bottom layer,
A coil support portion contacting the innermost coil of the first layer of the winding layer,
The coil support portion protrudes from an outer circumferential surface of the inner guide in a direction from the inner guide toward the outer guide. According to claim 12,
In the drop space expansion groove, the outermost coil of one of the plurality of winding layers is seated in the drop space expansion groove based on the radial direction of an imaginary circle formed along the inner circumferential surface of the inner guide. A motor formed to be located outside the outermost coil of the bottom layer. According to claim 13,
The body is formed concavely and includes a groove in which a coil forming a bottom layer of the coil is seated. According to claim 14,
Based on the radial direction of a virtual circle formed along the inner circumferential surface of the inner guide,
A motor in which an outermost coil of a second layer among the winding layers is seated in the drop space expansion groove. delete According to claim 12,
The stator core is a motor composed of a plurality of divided cores including each of the teeth.

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