KR101816645B1 - Stator of open slot motor and manufacturing method thereof - Google Patents

Abstract

A stator of an open slot motor and a method of manufacturing the stator are disclosed. A stator of an open slotted motor of the present invention includes a stator core including a plurality of stator teeth forming an open slot having a radial shape in the axial direction of a rotating shaft located at the center and a stator yoke connecting the ends of the plurality of stator teeth together, And a coil inserted into the plurality of stator teeth so that the shorter side of the trapezoidal shape is directed to the axial direction.

Description

Technical Field The present invention relates to a stator of an open slot motor,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an open slot motor, and more particularly, to a stator of an open slot motor and a method of manufacturing the stator of an open slot motor.

Generally, the coils of the stator slots are wound by hand or work with limited use of a winding machine. In this case, the winding work of winding the coil by hand takes a long time, and it is not only disadvantageous for mass production because of a difficult working method, but also has a main problem in that the manufacturing cost is raised due to labor costs and the like. In addition, since the winding operation using a winding machine can reduce the working time compared to the water winding, it is necessary to provide a space for the needle to pass through, so that when the opening width of the slot is narrow, the winding operation is difficult, It has a low problem.

In order to solve such a problem, a method of increasing the spot rate and improving the workability by directly winding the coil on the divided iron core is widely used. However, in the method of winding the coil on the divided iron core, there is a problem that each iron core wound with the coil is welded. In addition, as the number of slots increases, the time required for the welding work of the iron core and the labor cost increase, and the vibration and noise caused by the crevices between the divided iron cores and the material denaturation occurring during individual iron core welding, There is a problem that the performance of the motor may be deteriorated.

Therefore, there is a need for a new method of manufacturing a stator that can solve the above-described problems.

Korean Patent Laid-Open Publication No. 10-2015-0133546 (May 30, 2015)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a stator of an open slot motor for preventing a coil from being separated from a stator of an electric motor using an open slot and a method of manufacturing the same.

According to another aspect of the present invention, there is provided a stator of an open slot motor for shortening a manufacturing time of a stator without applying a divided iron core in an outer slotted slot motor, reducing cost, And the like.

Another object of the present invention is to provide a stator of an open slot motor and a method of manufacturing the stator using the stator core lamination technique in an inner rotor type slotted slot motor, .

In order to achieve the above object, a stator of an open slot motor according to the present invention comprises: a plurality of stator teeth forming a radial-shaped open slot in the axial direction of a rotating shaft located at the center; A stator core including a stator yoke and a coil wound in a trapezoidal shape in a cross section and inserted into the plurality of stator teeth so that the shorter side of the trapezoidal shape is oriented in the axial direction.

The stator further includes a separation preventing structure for preventing the coil from being separated by fixing the coil to the stator core.

The release preventing structure is characterized in that the stator core and the coil are entirely coated with a thermosetting resin.

In addition, when the stator yoke is formed at the end of the stator tooth facing the axial direction, the inner surface of the stationary ring formed by the nonconductive body is mounted so as to be in contact with the end of the coil in the opposite direction to the axis. do.

In addition, when the stator yoke is formed at the end of the stator tooth facing the opposite direction to the stator yoke, the outer surface of the stationary ring formed by the nonconductor is attached so as to be in contact with the end of the coil in the axial direction .

In addition, the separation preventing structure may include a plurality of insulators, each having a trapezoidal cross section, the coil being wound on a side surface of the square tube, and inserting the plurality of stator teeth into a square hole of the square tube, ).

Also, the plurality of insulators are inserted in such a manner that the shorter side of the trapezoid is oriented in the axial direction, and the ends of the trapezoidal shape are engaged with each other.

When the stator yoke is formed at the end of the stator yoke facing the opposite direction to the axis, the stator yoke is connected in a chain-like manner to each of the stator yokes including one stator tooth to form a linear iron core structure. do.

Further, the stator yoke is provided with a link in a portion formed in a chain-like shape, and fastening means is provided at both ends of the linear iron core structure so as to be deformed into a circular iron core structure.

An open slot motor according to the present invention comprises a rotor connected to a rotating shaft and forming a stator insertion hole at a center thereof, a stator inserted into the stator insertion hole and forming an open slot of a radial shape, Wherein the stator comprises: a plurality of stator teeth forming an open slot radially in the axial direction of the rotating shaft located at the center; and a plurality of stator teeth A stator core including a stator yoke connected to one end thereof, and a coil wound in a rectangular tube shape having a trapezoidal cross section and inserted into each of the plurality of stator teeth so that a short length of the trapezoidal shape is directed to an axial direction.

An open slotted electric motor according to the present invention includes: a stator for forming an open slot in a radial shape and forming a rotor insertion hole at the center; a rotor inserted into the rotor insertion hole and connected to the rotation shaft; And a permanent magnet inserted into the permanent magnet insertion hole, wherein the stator comprises: a plurality of stator teeth forming an open slot having a radial shape in the axial direction of the rotating shaft positioned at the center; and a plurality of stator teeth A stator core including a stator yoke connecting the ends of teeth to one end thereof and a coil wound in a rectangular tube shape having a trapezoidal cross section and inserted into each of the plurality of stator teeth so that the shorter side of the trapezoidal shape .

A method of manufacturing a stator of an open slot type electric motor according to the present invention includes the steps of winding a cross section of a rectangular tube in a trapezoidal shape and a plurality of stator teeth having a radial open slot in the axial direction of a rotating shaft And inserting each of the coils having a shorter length in the trapezoidal shape so as to face the axial direction.

The stator of the open slot motor and the method of manufacturing the same according to the present invention can prevent the coil from being separated from the stator of the motor using the open slot.

Also, it is possible to shorten the manufacturing time for the stator, reduce the cost, and improve the production without applying the divided iron core to the outer open slot motor.

In addition, it is possible to prevent the coil from escaping without a separate escape prevention structure by applying the lamination technique of the stator iron core in the inner conventional slotted slot motor.

1 is a view for explaining an outer rotor type open slot motor according to an embodiment of the present invention.
2 is a view for explaining a stator of an outer open-slotted electric motor according to an embodiment of the present invention.
3 is a view for explaining an inner rotor type slotted slot motor according to an embodiment of the present invention.
4 is a view for explaining a process of inserting a coil into a stator of an internal displacement type slotted slot motor according to an embodiment of the present invention.
5 is a view for explaining a stator of an internal-type open slot motor according to an embodiment of the present invention.
6 is a view for explaining a process of forming the first departure prevention structure in the outer rotor type slotted slot motor according to the embodiment of the present invention.
7 is a view for explaining a state where a first departure prevention structure is formed in an outer open slotted electric motor according to an embodiment of the present invention.
8 is a view for explaining a process of forming a second departure-avoidance structure in an outer-type open slot motor according to an embodiment of the present invention.
9 is a view for explaining a state in which a second departure-avoidance structure is formed in an outer-type open slot motor according to an embodiment of the present invention.
10 is a view for explaining a state in which a second release preventing structure is formed in an inner rotor type slotted slot motor according to an embodiment of the present invention.
11 is a schematic view for explaining a third departure prevention structure according to an embodiment of the present invention.
12 is a view for explaining a state where a third departure-avoiding structure is formed in an outer-type open slot motor according to an embodiment of the present invention.
13 is a view for explaining a state in which a third departure-avoidance structure is formed in an internal open slotted slot motor according to an embodiment of the present invention.
14 is a flowchart illustrating a method of manufacturing a stator of an open slot motor according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals as used in the appended drawings denote like elements, unless indicated otherwise. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather obvious or understandable to those skilled in the art.

FIG. 1 is a view for explaining an outer rotor type slotted slot motor according to an embodiment of the present invention, and FIG. 2 is a view for explaining a stator of an outer slotted slot motor according to an embodiment of the present invention.

Referring to FIGS. 1 and 2, the outer rotor type slotted electric motor 50 prevents the coil from escaping from the stator of the motor to which the open slot is applied. The outer rotor type slotted electric motor 50 shortens the manufacturing time for the stator, reduces the cost, and improves the fabrication without applying the split iron core. The outer rotor type slotted electric motor 50 includes a stator 10, a rotor 20 and a permanent magnet 30.

The stator (10) includes a stator core (11) and a coil (14).

The stator core 11 includes a plurality of stator teeth 12 which form an open slot radially in the axial direction of a rotating shaft 40 located at the center. In other words, the plurality of stator teeth 12 have a shape in which the stator shoe is removed and opened. The stator core 11 also includes a stator yoke 13 connecting the ends of the plurality of stator teeth 12 together. Here, the stator yoke 13 is formed at the end of the stator tooth 12 facing the axial direction. Thus, the stator iron core 11 forms a rotating shaft hole into which the rotating shaft 40 can be inserted.

The coil 14 is wound in a rectangular tube shape having a trapezoidal cross section and inserted into the plurality of stator teeth 12 so that the shorter side of the trapezoidal shape is directed to the axial direction. Also, since the coil 14 is inserted into the space from which the stator shoe is removed, the coil 14 can be wound more than when the stator shoe is provided.

Thus, the stator 10 can have a higher spot rate than conventional stator. In addition, since the stator core 11 is formed of the stator tooth 12 from which the stator shoe is removed, the user can increase the ease of winding the coil 14.

The rotor 20 has a stator insertion hole formed at its center, and the stator 10 is inserted. That is, the rotor 20 is positioned to face the end of the stator tooth 12 facing the direction opposite to the axis of the stator 10. The rotor 20 is connected to the rotating shaft 40 and can rotate according to the rotation of the rotating shaft 40. Here, the rotary shaft 40 may be connected to the rotor 20 through a bearing. The rotation axis 40 may be spaced apart from the rotation axis insertion hole by a predetermined distance.

The permanent magnet (30) is inserted into the permanent magnet insertion hole formed in the rotor (20). The permanent magnet 30 can be stacked and inserted in the permanent magnet insertion hole.

FIG. 3 is a view for explaining an inner rotor type slotted slot motor according to an embodiment of the present invention. FIG. 4 illustrates a process of inserting a coil into a stator of an inner slotted slot motor according to an embodiment of the present invention. And FIG. 5 is a view for explaining a stator of an internal-type open slot motor according to an embodiment of the present invention.

3 to 5, the inner rotor type slotted electric motor 60 prevents the coil from escaping from the stator of the motor to which the open slot is applied. The inner rotor type slotted electric motor 60 is modified by applying a lamination technique of the stator core to prevent the coil from escaping without a separate escape prevention structure. The inner typical open slot motor 60 includes a stator 10, a rotor 20 and a permanent magnet 30. [

The stator (10) includes a stator core (11) and a coil (14).

The stator core 11 includes a plurality of stator teeth 12 which form an open slot radially in the axial direction of a rotating shaft 40 located at the center. In other words, the plurality of stator teeth 12 have a shape in which the stator shoe is removed and opened. The plurality of stator iron cores (11) includes a stator yoke (13) connecting the ends of the plurality of stator teeth (12) together. Here, the stator yoke 13 is formed at the end of the stator tooth 12 facing the opposite direction. Thereby, the stator 10 can form a rotor insertion hole at the center thereof.

The stator core 11 may be deformed from a linear iron core structure to a circular iron core structure. That is, when the coil 14 is inserted in the linear iron core structure, the stator core 11 is deformed into a circular iron core structure to complete the stator 10. Such a structural deformation can facilitate the insertion of the coil 14 and at the same time prevent the coil 14 from coming off.

For this structural modification, the stator core 11 is connected to each of the nodes of the stator yoke 13 including one stator tooth 12 in a chain shape to form a linear iron core structure. Here, the stator yoke 13 has a link 15 at a portion formed in a chain shape. For example, the stator core 11 is provided with a link 15 between the first stator core 17, the second stator core 18, and the third stator core 19, .

The stator yoke 13 is provided with fastening means 16 at both ends of the linear iron core structure so that the linear iron core structure is deformed into a circular iron core structure. At this time, the fastening means 16 may be a hook, a lock, or the like.

The coil 14 is wound in a rectangular tube shape having a trapezoidal cross section and inserted into the plurality of stator teeth 12 so that the shorter side of the trapezoidal shape is directed to the axial direction. Here, the stator core 11 of the coil 14 is inserted in a linear iron core structure. Accordingly, when the stator iron core 11 is deformed into the circular iron core structure, the coil 14 is formed to have a beveled shape of the trapezoidal shape of the coil 14 to be mutually opposed to each other to generate a supporting force. That is, the coil 14 can prevent the stator core 11 from coming off. Also, since the coil 14 is inserted into the space from which the stator shoe is removed, the coil 14 can be wound more than when the stator shoe is provided.

Thus, the stator 10 can have a higher spot rate than conventional stator. In addition, since the stator core 11 is formed of the stator tooth 12 from which the stator shoe is removed, the user can increase the ease of winding the coil 14.

The rotor 20 is inserted into the rotor insertion hole formed in the stator 10. That is, the rotor 20 is positioned to face the end of the stator tooth 12 facing the axial direction of the stator 10. The rotor 20 includes a rotating shaft hole into which the rotating shaft 40 can be inserted, and the rotating shaft 40 is inserted through the rotating shaft hole and connected to each other. At this time, the rotor 20 can rotate in accordance with the rotation of the rotation shaft 40. [

The permanent magnet 30 is inserted into the permanent magnet insertion hole formed in the rotor 20. The permanent magnet 30 can be stacked and inserted in the permanent magnet insertion hole.

6 is a view for explaining a process of forming the first departure prevention structure in the outer rotor type slotted electric motor according to the embodiment of the present invention, and FIG. 7 is a cross-sectional view of the outer type open slot motor according to the embodiment of the present invention. Fig. 5 is a view for explaining a state in which the first departure prevention structure is formed.

6 and 7, the stator 10 of the outer conventional open slot motor 50 may form a first departure prevention structure to prevent the coil 14 from separating from the stator iron core 11 .

The first escape prevention structure is a structure in which a thermosetting resin 70 is applied to the whole of the stator core 11 and the coil 14 and molded. Here, the thermosetting resin 70 may include a phenol resin, a urea resin, a melamine resin, an epoxy resin, a polyester resin, and the like.

Therefore, the first departure prevention structure attaches the stator core 11 and the coil 14 to each other. Thus, the coil 14 can be prevented from being detached from the stator core 11. FIG.

6 and 7 are shown and described only for the outer open-slotted electric motor 50, but the present invention is also applicable to the inner-type open slot electric motor 60 shown and described in Fig. 3 by applying the thermosetting resin 70, can do. Thus, the inner rotor type slotted electric motor 60 can obtain the effect of attaching the stator core 11 and the coil 14.

FIG. 8 is a view for explaining a process of forming a second departure prevention structure in an outer-type open slot motor according to an embodiment of the present invention. FIG. 9 is a cross- FIG. 10 is a view for explaining a state in which the second release preventing structure is formed in the inner-type open slot motor according to the embodiment of the present invention. FIG.

8-10, the outer rotor type open slot motor 50 and the inner rotor type slotted electric motor 60 have a second departure prevention structure to prevent the coil 14 from being separated from the stator core 11. [ .

The second departure prevention structure is a structure in which the stationary ring 80 is mounted on the end of the coil 14. [ Here, the stationary ring 80 may be non-conductive.

When the stationary ring 80 is mounted on the outer conventional open slotted electric motor 50, the second departure prevention structure is formed so that the inner surface of the stationary ring 80 contacts the ends of the coil 14 in the opposite axial direction. (14) are wound on the upper and lower surfaces, respectively. In other words, the second departure prevention structure is a structure in which the stationary ring 80 is mounted on the end of the coil 14 in the opposite direction and the coil 14 is fixed in a circular shape by the stationary ring 80. Thus, the coil 14 can be prevented from being detached from the stator core 11. [

When the stationary ring 80 is mounted on the inner conventional open slotted electric motor 50, the second departure prevention structure is arranged such that the outer surface of the stationary ring 80 contacts the end of the coil 14 in the axial direction, Are wound on the upper and lower surfaces, respectively. In other words, the second departure prevention structure is a structure in which the stationary ring 80 is attached to the end of the axial coil 14 so that the stationary ring 80 supports the coil 14 without being released to the outside. Thus, the coil 14 can be prevented from being detached from the stator core 11. [

FIG. 11 is a schematic view for explaining a third departure prevention structure according to an embodiment of the present invention, and FIG. 12 illustrates a state in which a third departure prevention structure is formed in the outer opening type slot motor according to an embodiment of the present invention And FIG. 13 is a view for explaining a state in which the third release preventing structure is formed in the inner-type open slot motor according to the embodiment of the present invention.

11 to 13, the stator 10 of the outer-type open slot motor 50 may form a third departure prevention structure to prevent the coil 14 from being separated from the stator iron core 11 .

The third escape prevention structure is a structure in which a plurality of insulators (90) are mounted on the stator core (11). The insulator 90 includes a body 91, a through hole 94, and a projection 97.

The trunk portion (91) is formed by a rectangular tube whose cross section is a trapezoidal shape, and a coil (14) is wound on the side of the rectangular tube. The body portion 91 is formed with a rectangular hole 83 at the center thereof and inserted into the stator tooth 12. The trunk portion (91) is inserted such that the bottom surface of the trapezoidal shape having a short length is disposed in the axial direction. Here, the square hole 83 is formed to be larger than the size of the stator tooth 12, so that the insertion can be facilitated. The trunk portion 91 is formed with a rim 92 in a trapezoidal shape. In detail, the rim 92 is formed on the long side of the trapezoidal shape in the outer-type open slot motor 50, and is formed on the short side of the trapezoidal shape in the inner-type open slot motor 60.

The trunk portion 91 is inserted such that the shorter side of the trapezoidal shape is oriented in the axial direction, and the rims 92 formed in a trapezoidal shape are engaged with the ends of each other. In other words, the trunk portion 91 is coupled to the other end of the trapezoidal shape of the outer open-type slot-slot electric motor 50 so that the ends of the trapezoidal shape are short- Respectively.

The through-hole 94 and the projection 97 are formed in the rim 92, respectively. Here, at least one of the through-hole 94 and the protrusion 97 may be formed at a position where the square hole 93 is symmetrical. In addition, the through-hole 94 and the protrusion 97 can serve as a female and a male respectively in a combination of a plurality of insulators 90.

The outer open slotted electric motor 50 is inserted into the stator tooth 12 so that the first insulator 96, the second insulator 97 and the third insulator 98 are engaged with each other. At this time, the protrusion of the first insulator 96 is inserted into the through hole of the second insulator 97, and the protrusion of the second insulator 97 is inserted into the through hole of the third insulator 98. Accordingly, the outer open-type slotted electric motor 50 is coupled to the plurality of stator teeth 12 by crossing the plurality of insulators 90, respectively. At this time, the insulator (90) is joined with the rims formed on the longer sides of the trapezoid, crossing each other. Preferably, the insulator 90 is formed with a female screw acid inside the through-hole, and male screw acid is formed on the male screw, so that the screw can be engaged.

The inner typical open slotted electric motor 60 is also inserted into the stator tooth 12 so that the first, second and third insulators 96, 97 and 98 are engaged with each other. At this time, the protrusion of the first insulator 96 is inserted into the through hole of the second insulator 97, and the protrusion of the second insulator 97 is inserted into the through hole of the third insulator 98. Accordingly, the inner typical open slotted electric motor 60 is coupled to the plurality of stator teeth 12 by crossing the plurality of insulators 90, respectively. At this time, the insulator (90) is engaged with the edges formed on the shorter side of the trapezoid. Here, the inner conventional open slotted electric motor 60 can obtain the effect of strengthening the bond between the coils 14 through the attachment of the insulator 90. [

14 is a flowchart illustrating a method of manufacturing a stator of an open slot motor according to an embodiment of the present invention.

Referring to FIG. 14, the open slot motor prevents the coil 14 from departing from the stator 10 of the motor to which the open slot is applied.

In step S101, the coil 14 is wound in a rectangular tube shape having a trapezoidal cross section. Here, the shape of the square pipe having a trapezoidal cross section is the same as the shape of the stator tooth 13 to be inserted later, and the size thereof is larger than that of the stator teeth 13 so that the stator can be inserted.

In step S103, the coil 14 wound in step S101 is inserted into a stator tooth 13 formed in an open slot shape. At this time, the coil 14 is wound around a plurality of stator teeth 13, in which an open slot having a radial shape is formed in the axial direction of the rotating shaft located at the center, in a trapezoidal shape, And the stator 10 is completed.

In addition, the stator 10 may form an escape prevention structure. Through the escape prevention structure, the stator 10 can prevent the coil 14 from being detached.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation in the embodiment in which said invention is directed. It will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the appended claims.

10: stator 11: stator core
12: stator tooth 13: stator yoke
14: coil 15: link
16: fastening means 17: first stator iron core
18: second stator iron core 19: third stator iron core
20: rotor 30: permanent magnet
40: rotating shaft 50: outer open slot motor
60: Inner type open slot motor 70: Thermosetting resin
80: Retaining ring 90: Insulator
91: body portion 92: rim
93: square hole 94: through hole
95: projection 96: first insulator
97: Second insulator 98: Third insulator

Claims (12)

A stator core including a plurality of stator teeth forming an open slot having a radial shape in the axial direction of a rotating shaft located at the center, and a stator yoke connecting the ends of the plurality of stator teeth together;
A coil wound in a rectangular shape having a trapezoidal cross section and inserted into each of the plurality of stator teeth so that a shorter side of the trapezoidal shape is directed in the axial direction; And
And a separation prevention structure for fixing the coil to the stator core to prevent the separation from occurring,
The departure-
When the stator yoke is formed at the end of the stator tooth facing the axial direction, the two inner surfaces of the stationary ring formed of nonconductive material are mounted on the upper surface and the lower surface of the stator tooth wound on the coil so that the inner surface of the stationary ring is in contact with the end of the coil And,
When the stator yoke is formed at the end of the stator tooth facing the opposite axial direction, the two outer surfaces of the stationary ring formed of nonconductive material come in contact with the ends of the coils in the axial direction, Wherein the stator is a structure in which the stator is mounted. delete The method according to claim 1,
The departure-
Further comprising a structure in which a thermosetting resin is applied to the entire stator core and the coil to mold the stator core and the coil. delete delete The method according to claim 1,
The departure-
Further comprising a plurality of insulator structures in which a cross section is formed by a rectangular tube with a trapezoidal shape, the coil is wound on the side of the rectangular tube, and a square hole of the rectangular tube is inserted into each of the plurality of stator teeth And the stator of the open slot motor. The method according to claim 6,
Wherein the plurality of insulators include:
Wherein a short side of the trapezoidal shape is inserted in a direction of an axial direction, and the trapezoidal end of the trapezoidal shape is engaged with the end of the trapezoidal shape. The method according to claim 1,
The stator core includes a stator core,
Wherein when the stator yoke is formed at the end of the stator tooth facing in the opposite direction to the axis, each of the stator yokes including one stator tooth is connected in a chain form to form a linear iron core structure. . 9. The method of claim 8,
The stator yoke includes:
Wherein a link is provided at a portion formed in a chain shape and a fastening means is provided at both ends of the linear iron core structure so as to be deformed into a circular iron core structure. A rotor connected to the rotating shaft and defining a stator insertion hole at a center thereof;
A stator inserted into the stator insertion hole and defining an open slot in a radial shape; And
And a permanent magnet inserted into the permanent magnet insertion hole formed in the rotor,
The stator comprises:
A stator core including a plurality of stator teeth forming an open slot having a radial shape in the axial direction of the rotating shaft located at the center and a stator yoke connecting the ends of the plurality of stator teeth facing in the axial direction together;
A coil wound in a rectangular shape having a trapezoidal cross section and inserted into each of the plurality of stator teeth so that a shorter side of the trapezoidal shape is directed in the axial direction; And
And a separation preventing structure for fixing the coil to the stator core to prevent the coil from being separated,
The departure-
And the two openings of the stationary ring formed of the non-conductive material are respectively mounted on the upper and lower surfaces of the stator teeth wound on the coils so that the inner surfaces of the two stationary rings are in contact with the ends of the coils in opposite directions. A stator forming a radial-shaped open slot and forming a rotor insertion hole at the center;
A rotor inserted into the rotor insertion hole and connected to the rotation shaft; And
And a permanent magnet inserted into the permanent magnet insertion hole formed in the rotor,
The stator comprises:
A stator core including a plurality of stator teeth forming an open slot having a radial shape in the axial direction of the rotating shaft located at the center and a stator yoke connecting one end of the plurality of stator teeth facing in the opposite direction to each other;
A coil wound in a rectangular shape having a trapezoidal cross section and inserted into each of the plurality of stator teeth so that a shorter side of the trapezoidal shape is directed in the axial direction; And
And a separation preventing structure for fixing the coil to the stator core to prevent the coil from being separated,
The departure-
And the two openings of the stationary ring formed by the non-conductor are in contact with the ends of the coils in the axial direction, respectively, so that the coils are mounted on the upper and lower surfaces of the wound stator teeth, respectively. Winding a cross-section in a trapezoidal rectangular tube shape;
Inserting each of the wound coils into a plurality of stator teeth having open slots formed in a radial shape in the axial direction of a rotating shaft located at the center so as to face mutually shorter axes in the trapezoidal shape; And
When the stator yoke connecting the ends of the plurality of stator teeth together is formed at the end of the stator tooth facing the axial direction, the two inner surfaces of the stationary ring formed of non-conductive material come in contact with the end of the coil in the opposite direction, And the stator yoke is formed on the end of the stator tooth facing the opposite direction so that the two outer surfaces of the stationary ring formed by the nonconductor are in contact with the end of the coil in the axial direction Mounting the coils on upper and lower surfaces of the wound stator teeth, respectively;
Wherein the stator comprises a stator.

Images