JP2020088952A - Rotary electric machine, stator, and stator assembly method - Google Patents

Abstract

To bind a stator core made by stacking electromagnetic steel sheets without heating during operation.SOLUTION: A rotary electric machine includes: a rotor having a rotor shaft and a rotor core; a stator having a stator core having a laminated structure 120 composed of a plurality of electromagnetic steel plates 110 bound together by a plurality of binding members 130, laminated in an axial direction, arranged at intervals radially outside in a circumferential direction and a stator winding penetrating the stator core; and two bearings. Each electromagnetic steel plate 110 is a circular plate having a circular opening at a center. At an outer side in a radial direction, a plurality of notches is formed at intervals in the circumferential direction. Mutually adjacent ones in the axial direction are laminated to be displaced by a predetermined angle. The notches of the electromagnetic steel plates 110 form an outer groove 121 penetrating in the axial direction. The binding members 130 are disposed in each of the outer grooves 121 and mechanically coupled to the electromagnetic steel plates 110 by mutual frictional force.SELECTED DRAWING: Figure 7

Description

The present invention relates to a rotating electric machine, a stator, and a method for assembling the stator.

A rotating electric machine usually includes a rotor having a rotor shaft and a rotor core attached to the rotor shaft, and a stator having a stator core arranged radially outside the rotor core and a stator winding passing through the stator core. Prepare

In the rotor core and the stator core, iron loss due to eddy currents and the like generated during operation contributes to heat generation and causes a decrease in efficiency. Therefore, reducing the flow of eddy currents inside the rotor core and the stator core is effective for ensuring the efficiency of the rotating electric machine and protecting the insulator.

Therefore, the rotor core and the stator core in the rotating electric machine are generally used in a laminated structure in which disc-shaped electromagnetic steel plates made of a ferromagnetic material and having an opening in the center are laminated in the axial direction. There is. As the electromagnetic steel sheet, for example, a silicon steel sheet having a relatively high magnetic permeability and a low price is used (see Patent Document 1).

JP 2000-116060 A

In the stator core, a plurality of slots are formed on the radially inner surface of the stator core so as to be spaced apart from each other in the circumferential direction and penetrate in the axial direction, and the stator winding passes through the slots. The slot is formed by forming a notch in an electromagnetic steel sheet and stacking the electromagnetic steel sheets in the axial direction. Further, a hole or a notch for penetrating the tightening bolt that binds the electromagnetic steel plates is also formed in the same manner.

On the other hand, this slot is usually formed parallel to the rotation axis, but it may be formed in a spiral shape. That is, in the synchronous machine, the slot for the rotor winding may be formed obliquely, that is, in a spiral shape where the slot is normally formed in parallel with the rotation axis direction to improve the efficiency. Here, when the rotor side is a permanent magnet type, the rotor side cannot be formed in a spiral shape, and therefore the slots on the stator winding side may be formed in a spiral shape.

Such slots can be formed by sequentially shifting the angles in the circumferential direction in the laminating direction when laminating the electromagnetic steel sheets. In this case, the outer groove that binds the electromagnetic steel sheets is also formed in a spiral shape after the electromagnetic steel sheets are stacked.

The stator core after the lamination of the electromagnetic steel plates is difficult to bind with fastening bolts or the like for binding the electromagnetic steel plates unless a hole or groove for penetration is newly formed in the direction perpendicular to the rotation axis. For this reason, for binding the electromagnetic steel sheets, a method is often used in which the binding member is arranged in a spiral groove formed on the outer surface of the stator core and the binding member is welded to the outer surface groove.

However, in this case, a welding machine and welding material are required, and there is a risk of burns during welding work. In addition, in the case of the squirrel-cage induction motor, a driving method using a high frequency power source is often used, but there is a problem that a large eddy current proportional to the frequency is generated in the welded portion.

Therefore, an object of the present invention is to bind a stator core formed by laminating electromagnetic steel sheets without using welding, which is a factor of heat generation during operation.

In order to achieve the above-mentioned object, a rotating electric machine according to the present invention includes a rotor shaft that extends in an axial direction and is rotatably supported, and a rotor core that is attached to a radially outer side of the rotor shaft. And a plurality of binding members which are provided on the outer side in the radial direction of the rotor core so as to surround the rotor core, are stacked in the axial direction, and are bound by a plurality of binding members arranged at intervals in the circumferential direction on the outer side in the radial direction. Of a cylindrical stator iron core having a laminated structure made of electromagnetic steel sheets, a stator having a stator winding axially penetrating the inside of the stator iron core, and the rotor shaft of the rotor shaft sandwiching the rotor iron core. A rotary electric machine comprising: two bearings that rotatably support the rotor shaft on both sides in the axial direction, wherein each of the plurality of electromagnetic steel plates is a disk having a circular opening in the center and is radially outward. A plurality of notches are formed at intervals in the circumferential direction, the notches of the plurality of electromagnetic steel plates form a plurality of outer grooves penetrating in the axial direction, and in each of the plurality of outer grooves. The binding member is arranged, and the binding member and the plurality of electromagnetic steel plates are coupled to each other by a frictional force of each other.

A stator according to the present invention is a stator of a rotary electric machine that includes a rotor having a rotor shaft and a rotor core, and two bearings, and is laminated in a cylindrical shape in the axial direction and mutually in the circumferential direction. A stator core having a laminated structure composed of a plurality of electromagnetic steel sheets bound by a plurality of binding members arranged at intervals; and a stator winding axially penetrating the inside of the stator core. , Each of the plurality of magnetic steel sheets is a disk having a circular opening in the center, a plurality of notches are formed on the outer side in the radial direction at intervals in the circumferential direction. The notch forms a plurality of outer grooves penetrating in the axial direction, and the binding member is arranged in each of the plurality of outer grooves so that the binding member and the plurality of electromagnetic steel plates are coupled by mutual frictional force. It is characterized by

Further, the stator assembling method according to the present invention, the electromagnetic steel plate manufacturing step of manufacturing a plurality of electromagnetic steel plate in which a notch is formed radially outward, and a plurality of electromagnetic steel plates manufactured in the electromagnetic steel plate manufacturing step. A stacking step of stacking to form a stacked structure; an installation step of installing a binding member in each of the plurality of outer grooves formed in the stacked structure by the cutout after the stacking step; A joining step of joining the side groove and the side groove by a frictional force generated by caulking the binding member.

According to the present invention, a stator core formed by laminating electromagnetic steel sheets can be bound without using welding, which is a factor of heat generation during operation.

It is a longitudinal section showing the composition of the rotary electric machine concerning an embodiment. It is a flowchart which shows the procedure of the assembly method of the stator which concerns on embodiment. It is a front view which shows the electromagnetic steel plate which comprises the stator which concerns on embodiment. It is a perspective view which shows the laminated structure of the electromagnetic steel plates which comprise the stator which concerns on embodiment. It is a perspective view which shows the example of the jig|tool for lamination|stacking of the electromagnetic steel plate which comprises the stator which concerns on embodiment. It is a perspective view which shows the modification of the jig|tool for lamination|stacking of the electromagnetic steel plates which comprises the stator which concerns on embodiment. FIG. 3 is a development view in which the outer surface of the stator core of the stator according to the embodiment is developed in the circumferential direction. FIG. 8 is a partial cross-sectional view taken along the line VIII-VIII in FIG. 7 showing the state before caulking of the outer groove formed in the stator core of the stator according to the embodiment and the binding member attached thereto. FIG. 8 is a partial cross-sectional view taken along the line IX-IX of FIG. 7 showing the outer groove formed in the stator core of the stator according to the embodiment and the binding member after caulking attached thereto. It is a perspective view explaining the relationship between the angle difference at the time of laminating electromagnetic steel sheets, and a change angle. FIG. 9 is a partial vertical cross-sectional view taken along the line XI-XI of FIG. 7 showing the outer groove formed in the stator core of the stator according to the embodiment and the binding member after caulking attached thereto.

Hereinafter, a rotating electric machine, a stator, and a method for assembling the stator according to the present invention will be described with reference to the drawings. Here, parts that are the same or similar to each other are designated by common reference numerals, and duplicate description will be omitted.

[First Embodiment]
FIG. 1 is a vertical cross-sectional view showing the configuration of the rotary electric machine according to the first embodiment. The rotary electric machine 200 includes a rotor 10, a stator 20, two bearings 30, a frame 40, and two bearing brackets 45.

The rotor 10 has a rotor shaft 11 and a rotor core 12. The rotor shaft 11 extends in the horizontal direction and is rotatably supported by bearings 30 on both outer sides of the rotor core 12 in the axial direction. The rotor core 12 has a cylindrical shape and is attached to the outer side of the rotor shaft 11 in the radial direction.

The stator 20 has a cylindrical stator core 100 and a plurality of stator windings 22.

The stator core 100 is provided outside the rotor core 12 in the radial direction so as to surround the rotor core 12 via a gap 18. The stator core 100 includes a laminated structure 120 (FIG. 4) having a plurality of magnetic steel sheets 110 made of a ferromagnetic material laminated in the axial direction and a binding member 130 (FIG. 7).

A plurality of stator slots 102 (FIG. 4) are formed inside the stator core 100 in the radial direction so as to be spaced apart from each other in the circumferential direction and penetrate axially so as to cut out the inner peripheral surface of the stator core 100. Has been done. The stator windings 22 axially penetrate through the plurality of stator slots 102 and are connected to each other outside the stator core 100 in the axial direction, or are connected to external wiring.

The frame 40 has a substantially cylindrical shape and is arranged radially outside the rotor core 12 and the stator 20 to accommodate them. The two bearing brackets 45 are connected to both ends of the frame 40 so as to close the axial end of the frame 40, and each support the bearing 30 stationary.

FIG. 2 is a flowchart showing the procedure of the stator assembling method according to the embodiment.

FIG. 3 is a front view showing an electromagnetic steel sheet forming the stator according to the embodiment. First, a plurality of electromagnetic steel plates 110 are manufactured (step S01).

Each electromagnetic steel plate 110 has a circular opening 110a at the center and an outer edge 110b is a circular plate. On the inner side in the radial direction, a plurality of slot notches 115 are formed at intervals in the circumferential direction. The slot notch 115 has a substantially rectangular shape extending in the radial direction, and the inside in the radial direction communicates with the opening. The tooth portions 116 are formed by the slot notches 115 that are adjacent to each other.

Further, a plurality of outer cutouts 111 are formed on the outer side in the radial direction of each electromagnetic steel plate 110, that is, on the outer edge 110b, at intervals in the circumferential direction. Each of the outer cutouts 111 has a circumferential side portion 111a formed substantially linearly in the circumferential direction and two diameters formed substantially linearly in the radial direction with the circumferential side portion 111a interposed therebetween. It has a direction side portion 111b.

Next, the electromagnetic steel plates 110 are laminated in the axial direction while being shifted by a predetermined angle in the circumferential direction to form the laminated structure 120 (step S02). FIG. 4 is a perspective view showing a laminated structure of electromagnetic steel plates constituting the stator according to the embodiment.

A plurality of axially extending stator slots 102 and a plurality of stator teeth 101 are formed in the laminated structure 120 by the plurality of slot notches 115 and the plurality of teeth 116 formed in each electromagnetic steel plate 110. Has been done.

Further, the plurality of outer notches 111 formed in each of the electromagnetic steel plates 110 form a plurality of outer grooves 121, which are axially spaced apart from each other in the circumferential direction, on the radially outer side of the laminated structure 120. ing.

The electromagnetic steel sheets 110 are laminated in the axial direction, but at this time, the electromagnetic steel sheets 110 adjacent to each other are laminated while sequentially shifting the angles in the same direction by a predetermined value (change angle ΔΘ). As a result, as shown in FIG. 4, the stator slot 102, the stator teeth 101, and the outer groove 121 are formed in a spiral shape.

FIG. 5 is a perspective view showing an example of a jig for laminating electromagnetic steel sheets. The stacking jig 150 has a columnar portion 150a and one spiral guide 150b which is a protrusion provided on the radially outer surface of the columnar portion 150a and extending in the axial direction.

The outer diameter of the columnar portion 150a is slightly smaller than the inner diameter of the opening 110a of the electromagnetic steel plate 110. The plurality of spiral guides 150b are provided in a spiral shape along the longitudinal direction of the cylindrical portion 150a while inclining by an inclination angle Φ (FIG. 7). The cross-sectional shape of the spiral guide 150b corresponds to a part of the plurality of stator slots 102 formed in the laminated structure 120.

The stacking jig 150 shown in FIG. 5 is shown as being integrally formed. In this case, after the electromagnetic steel plates 110 are stacked on the outside of the stacking jig 150 to form a stack, the stacking jig 150 is pulled out while being rotated by an inclination angle Φ. The stacking jig 150 may be formed so as to be divisible. That is, after the stacked structure 120 is formed, the stacking jig 150 may be placed inside the stacked structure 120, divided into units that can be easily taken out, and then individually taken out.

FIG. 6 is a perspective view showing a modified example of a jig for laminating electromagnetic steel plates. The stacking jig 160 has an inner guide 161 and a plurality of outer guides 162. In this modification, for example, when the electromagnetic steel plates 110 are stacked, the weight of the electromagnetic steel plates 110 becomes large, and therefore it is difficult to manually align the centers of the electromagnetic steel plates 110, and when a jig element is added. Is shown. Further, for the same reason, a plurality of spiral outer guides 162 are provided in order to align the centers at the stacking stage of the respective electromagnetic steel plates 110 as much as possible.

The inner guide 161 has a cylindrical portion 161a and a plurality of spiral guides 161b which are projections provided on the radially outer surface of the cylindrical portion 161a and extending in the axial direction. The spiral guides 161b are arranged at intervals in the circumferential direction.

The outer diameter of the column portion 161a is formed slightly smaller than the inner diameter of the opening 110a of the electromagnetic steel plate 110. The plurality of spiral guides 161b are provided in a spiral shape while being inclined by an inclination angle Φ (FIG. 7) along the longitudinal direction of the cylindrical portion 161a. Further, the plurality of spiral guides 161b are provided at intervals in the circumferential direction, and the shape thereof corresponds to a part of the plurality of stator slots 102 formed in the laminated structure 120.

Although FIG. 6 shows an example in which two spiral guides 161b are provided, the present invention is not limited to this. There may be three or more. However, it is not preferable that the number is too large to smoothly carry out the stacking work.

Each of the plurality of outer guides 162 has a shape obtained by dividing a cylinder in the circumferential direction, and the inner side surface 162a is formed so as to be in close contact with the outer edge 110b of the electromagnetic steel plate 110. Although FIG. 5 shows an example in which the number of the outer guides 162 is two, the number of the outer guides 162 may be three or more. After stacking the electromagnetic steel plates 110 and taking out the inner guide 161, the outer guide 162 is used. That is, all the outer guides 162 are pressed against the laminated electromagnetic steel plates 110 to correct the misalignment between the electromagnetic steel plates 110. In addition, when the plurality of outer guides 162 are pressed against the electromagnetic steel plate 110, the outer guides 162 do not cover the entire circumference, and even if the outer guides 162 do not exist in a certain direction, the misalignment can be corrected. I wish I had it.

The inner guide 161 is shown as being integrally formed. In this case, after the electromagnetic steel plates 110 are laminated on the outside of the inner guide 161, and the lamination is formed, the inner guide 161 is pulled out while being rotated by the inclination angle Φ. In addition, the inner guide 161 may also be formed to be dividable.

Next, the binding member 130 is installed in the outer groove 121 (step S03).

FIG. 7 is a development view in which the outer surface of the stator core of the stator according to the embodiment is developed in the circumferential direction. The outer groove 121 is inclined by an inclination angle Φ with respect to the axial direction. Here, as the inclination angle Φ is larger, the length of the outer groove 121 is longer, and the binding force by the frictional force described later is increased.

A binding member 130 is installed along the outer groove 121, and both ends of the binding member 130 project axially outward from the electromagnetic steel plate 110.

FIG. 8 is a partial cross-sectional view taken along the line VIII-VIII of FIG. 7 showing the state before caulking of the outer groove formed in the stator core of the stator according to the embodiment and the binding member attached thereto.

The outer groove 121 is a groove that is formed by a circumferential surface 121a that extends in the circumferential direction and two radial side surfaces 121b that are formed along the radial direction so as to face each other with the circumferential surface 121a interposed therebetween and that extends in the axial direction.

The bundling member 130 has a long plate shape and is formed so as to be bent at the center in the width direction. That is, the two flat plate portions 132 are adjacent to each other in the width direction, not in the same plane, with the ridge portion 131 at the center in the width direction interposed therebetween. In this state, the binding member 130 is installed in the outer groove 121.

Next, the binding member 130 is caulked in the outer groove 121 (step S04).

FIG. 9 is a partial lateral cross-sectional view taken along the line IX-IX of FIG. 7 showing the outer groove and the binding member after caulking attached thereto. After caulking, the bundling member 140 pushes the ridge 131 (FIG. 8) at the center in the width direction of the bundling member 130 from the radially outer side to the radially inner side by hitting the bundling member 130 (FIG. 8), for example. The angle formed by the two flat plate portions 132 (FIG. 8) is made small, and the whole is crushed so as to approach the flat plate.

In such a state, within the groove inside 141 of the bundling member 140 after crimping (FIG. 11), that is, within the axial length of the stator core 120, both sides in the width direction of the bundling member 140 after crimping and the outer groove 121. A compressive force is exerted between the two radial side surfaces 121b. As a result, a static frictional force is generated between the radial side surface 121b and the binding member 140 after caulking.

As a result of this frictional force, a binding force between the electromagnetic steel plates 110, that is, a force for binding the laminated electromagnetic steel plates 110 is secured. The larger the inclination angle Φ, the larger the contact area between the binding member 140 after caulking and the radial side surfaces 121b on both sides of the outer groove 121, and the larger the frictional force.

FIG. 10 is a perspective view illustrating the relationship between the change angle and the inclination angle when the electromagnetic steel sheets are stacked. The disk in FIG. 10 represents one electromagnetic steel plate 110. C1 indicates the center of the front surface of the first electromagnetic steel plate 110. Now, it is assumed that the electromagnetic steel plates 110 adjacent to each other are in close contact with each other. Then, the similar center of the adjacent second electromagnetic steel plates 110 becomes C2, which is at the same position as the center of the back surface of the first electromagnetic steel plate 110.

Now, a point on the outer circumference on the front side of the first electromagnetic steel plate 110 is defined as P1. The corresponding point on the outer edge on the front side of the second magnetic steel sheet 110 is P20. Now, the second electromagnetic steel plate 110 is rotated clockwise relative to the first electromagnetic steel plate 110 by the change angle ΔΘ. In this case, the position of the point P20 moves to the point P2. The line segment P20-P2 is moved with respect to the thickness d of the electromagnetic steel plate 110, and this angle becomes the inclination angle Φ.

Therefore, the change angle Δθ when laminating the electromagnetic steel plates 110, that is, the relationship between the angle difference between the adjacent electromagnetic steel plates 110 and the inclination angle Φ is expressed by the following formula (1).
R·ΔΘ=d·tanΦ (1)

For example, when the diameter of the electromagnetic steel plate 110 is 300 mm, and the change angle ΔΘ generated for the electromagnetic steel plates 110 laminated to have a thickness of 10 mm is 2 degrees, Φ is about 28 degrees. In this case, the length of the outer groove 121 is increased by about 13% as compared with the case where the inclination angle Φ is 0. Therefore, in the outer groove 121, the frictional force between the binding member 140 after caulking and each electromagnetic steel plate 110 is significantly increased, which is effective in ensuring the binding force of the electromagnetic steel plate 110 of the laminated structure 120.

In this way, the inclination angle Φ is set by the value of the change angle ΔΘ when the electromagnetic steel plates 110 are stacked. The change angle ΔΘ is set by the laminating jig 150.

Next, both ends of the bundling member 140 after crimping in the longitudinal direction are bent (step S05). 11 is a partial vertical cross-sectional view of the outer groove and the bundling member attached thereto, which is taken along line XI-XI of FIG. In the bundling member 140 after caulking, the end portions 142 that are portions axially outside of the groove interior 141 that is a portion within the axial length of the stator core 120 are present on both sides of the stator core 120 in the axial direction. I will fold this part.

As a result of the end portion of the binding member 140 being bent after being crimped, the electromagnetic steel sheet 110 near the end portion in the axial direction is tightened in the axial direction and contributes to securing the binding force.

Next, the stator winding 22 is installed in the stator slot 102, and the axially outer end of the stator core 100 is connected (step S06). That is, the conductors of the stator winding 22 are connected to each other outside the stator core 100 in the axial direction.

As described above, the stator 20 and the method of assembling the stator 20 according to the present embodiment can bind the stator core formed by stacking the electromagnetic steel plates 110 without causing a factor of heating during operation.

[Other Embodiments]
Although the embodiments of the present invention have been described above, the embodiments are presented as examples and are not intended to limit the scope of the invention. For example, in the embodiment, the case where the rotor shaft 11 is a horizontal rotary electric machine that extends in the horizontal direction is shown as an example, but the present invention is not limited to this. It may be a vertical rotating electric machine in which the rotor shaft extends in the vertical direction.

Further, in the embodiment, the case where the stator slot 102 and the outer groove 121 are formed in a spiral shape is shown as an example, but the stator slot 102 and the outer groove 121 may be formed in a linear shape along the axial direction. Further, it may be linearly extended with an angle in the axial direction. That is, it may be formed along the intersecting lines of a virtual plane having an inclination with respect to the axial direction and the week surface and the outer peripheral surface without the stator core.

Further, the features of the respective embodiments may be combined. Furthermore, the embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. The embodiments and the modifications thereof are included in the invention described in the claims and equivalents thereof, as well as included in the scope and the gist of the invention.

10... Rotor, 11... Rotor shaft, 12... Rotor core, 18... Air gap, 20... Stator, 22... Stator winding, 30... Bearing, 40... Frame, 45... Bearing bracket, 100... Stator core , 101... Stator teeth, 102... Stator slot, 110... Electromagnetic steel plate, 110a... Opening, 110b... Outer edge, 111... Outer notch, 111a... Circumferential side part, 111b... Radial side part, 115... For slot Notch, 116... Tooth portion, 120... Laminated structure, 121... Outer groove, 121a... Circumferential surface, 121b... Radial side surface, 130... Binding member, 131... Ridge portion, 132... Flat plate portion, 140... After caulking binding Member, 141... Inside groove, 142... End, 150... Laminating jig, 150a... Cylindrical part, 150b... Helical guide, 160... Laminating jig, 161... Inner guide, 161a... Cylindrical part, 161b... Helix -Shaped guide, 162... Outer guide, 162a... Inner side surface, 200... Rotating electric machine

Claims (8)

A rotor having a rotor shaft that extends in the axial direction and is rotatably supported, and a rotor core that is attached to an outer side in the radial direction of the rotor shaft,
A plurality of electromagnetic waves bounded by a plurality of binding members which are provided on the outer side of the rotor core in the radial direction so as to surround the rotor core, are stacked in the axial direction, and are arranged on the outer side in the radial direction at intervals in the circumferential direction. A stator having a cylindrical stator core having a laminated structure made of steel sheets, and a stator winding axially penetrating the inside of the stator core,
Two bearings that rotatably support the rotor shaft on both sides in the axial direction of the rotor shaft with the rotor core interposed therebetween;
A rotating electric machine comprising:
Each of the plurality of electromagnetic steel plates is a disk having a circular opening in the center, a plurality of notches are formed on the outer side in the radial direction at intervals in the circumferential direction,
The notches of the plurality of electromagnetic steel plates form a plurality of outer grooves penetrating in the axial direction,
In each of the plurality of outer grooves, the binding member is arranged and the binding member and the plurality of electromagnetic steel plates are coupled by mutual frictional force,
A rotating electric machine characterized by the above. The rotary electric machine according to claim 1, wherein the plurality of magnetic steel sheets are laminated so that the mutually adjacent ones in the axial direction are displaced from each other by a predetermined angle. The rotating electrical machine according to claim 1, wherein the binding member is in a crushed state within the outer groove. The said bundling member is bent at both axial outer sides of the said electromagnetic steel plate of the axial direction outermost end part of the said laminated structure, It is bent, The any one of Claim 1 thru|or 3 characterized by the above-mentioned. Rotating electric machine. A stator of a rotating electric machine comprising a rotor having a rotor shaft and a rotor core, and two bearings,
A stator core having a laminated structure composed of a plurality of electromagnetic steel plates that are bundled by a plurality of binding members that are laminated in a cylindrical shape in the axial direction and are arranged at intervals in the circumferential direction,
A stator winding axially passing through the stator core;
Equipped with,
Each of the plurality of electromagnetic steel plates is a disk having a circular opening in the center, a plurality of notches are formed on the outer side in the radial direction at intervals in the circumferential direction,
The notches of the plurality of electromagnetic steel plates form a plurality of outer grooves penetrating in the axial direction,
In each of the plurality of outer grooves, the binding member is arranged and the binding member and the plurality of electromagnetic steel plates are coupled by mutual frictional force,
Stator characterized by that. A magnetic steel plate manufacturing step for manufacturing a plurality of magnetic steel plates having notches formed on the radial outside,
A laminating step of laminating a plurality of electromagnetic steel sheets produced in the electromagnetic steel sheet producing step to form a laminated structure,
After the laminating step, an installation step of installing a binding member in each of the plurality of outer grooves formed in the laminated structure by the cutout,
A joining step of joining the binding member and the outer groove by a frictional force caused by caulking the binding member;
A method for assembling a stator, comprising: 7. The method of assembling the stator according to claim 6, wherein the stacking step includes stacking the plurality of electromagnetic steel plates while shifting them in the circumferential direction by a predetermined angle. In the laminating step, the slots of the plurality of magnetic steel sheets are provided on the outer side in the radial direction of the laminating jig having at least one spiral projection arranged at intervals in the circumferential direction on the outer surface in the radial direction of the cylinder. 8. The method for assembling the stator according to claim 7, further comprising the step of stacking the notches for use together and sequentially laminating the notches.

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