CN209844668U

CN209844668U - Stator for rotating electric machine

Info

Publication number: CN209844668U
Application number: CN201920239491.3U
Authority: CN
Inventors: 糸山辽介
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 2018-03-02
Filing date: 2019-02-26
Publication date: 2019-12-24
Anticipated expiration: 2029-02-26
Also published as: JP2019154159A

Abstract

The utility model provides a can shorten the length of the wire rod that forms the coil section, realize that the reduction of coil weight, material cost, the loss of the eddy current of coil reduce and the stator for rotating electrical machines of production efficiency's improvement. A stator (10) for a rotating electrical machine comprises an annular stator core (11), a plurality of slits (12) provided on the inner peripheral surface of the stator core (11), and a plurality of coil segments (20) arranged on each slit (12). The coil segment (20) includes an insertion portion (21) inserted into the slit (12), a first extension portion (22) extending from a first end portion (21a) in the axial direction (Dc), a second extension portion (23) extending from a second end portion (21b) in the axial direction (Dc), and a recognition portion (30A) recognizing a relative position of the coil segment (20) with respect to the slit (12), and the coil segment (20) is arranged such that the recognition portion (30A) matches a specific position of the stator core (11) in the axial direction (Dc).

Description

Stator for rotating electric machine

Technical Field

The utility model relates to a stator for rotating electrical machines.

Background

Conventionally, a motor in which a coil is mounted via an insulating film in a slit formed in a stator core (stator core) is known (for example, see patent document 1).

However, in the structure using the insulating film, the number of parts increases, which leads to an increase in manufacturing cost and manufacturing cost of the motor.

In contrast, a stator of a rotating electric machine having a structure in which a plurality of crank (crank) -shaped coil segments (coil segments) are inserted into slits of a stator core has been proposed (see, for example, patent document 2). The coil segment integrally includes: a linear insertion portion extending in the axial direction of the stator core and inserted into the slit; and extension parts extending from both ends of the insertion part in a circumferential direction of the stator core, respectively. The insertion portions of the coil segments are inserted into a plurality of slits formed in the circumferential direction of the stator core, respectively. The extending portion extends in the circumferential direction of the stator core outside the slit in the axial direction. The plurality of coil segments electrically join the ends of the extension portions to each other, thereby forming a coil of the stator. The coil segment is formed of a wire including a conductor and an insulating coating layer coating the conductor. Thus, the insulating coating layer is interposed between the conductor of the coil segment and the inner peripheral surface of the slit in the slit, and thus an insulating film is not required.

[ Prior art documents ]

[ patent document ]

[ patent document 1] Japanese patent laid-open No. 2014-187739

[ patent document 2] Japanese patent laid-open No. 2000-228852

SUMMERY OF THE UTILITY MODEL

[ problem to be solved by the utility model ]

However, the coil segment as described above has a bent portion between the insertion portion extending in the axial direction of the stator coil and the extension portion extending in the circumferential direction at both end portions of the insertion portion. When the insertion portion of the coil segment is inserted into the slit, the bent portion of the coil segment comes into contact with a corner or the like of the end portion of the stator core, and if the insulating coating layer of the coil segment is peeled off, the insulation is destroyed.

Therefore, the coil segment is formed such that the length of the insertion portion is larger than the axial length of the slit so that both ends of the insertion portion protrude from the slit to both sides in the axial direction in a state of being inserted into the slit. That is, the insertion portion of the coil segment has extra length on both sides in the axial direction of the slit. Thus, the bent portions at both ends of the insertion portion are separated on both sides in the axial direction of the slit, and when the insertion portion is inserted into the slit, the bent portions are prevented from interfering with the stator core.

However, when the length of the insertion portion in the axial direction is made larger than the slit to have an extra length, the length of the wire rod (conductor and insulating coating layer) required to form the coil segment increases. As a result, the weight of the coil increases, the material cost increases, the eddy current (eddy current) loss in the coil increases, and the production efficiency decreases.

Therefore, an object of the present invention is to provide a stator for a rotating electrical machine, which can shorten the length of a wire rod forming a coil segment, and which can reduce the weight of a coil, reduce the material cost, reduce the eddy current loss of the coil, and improve the production efficiency.

[ means for solving problems ]

The utility model discloses a solve the problem, adopt following method.

That is, the stator for a rotating electric machine (for example, the stator 10 for a rotating electric machine according to the embodiment) of the present invention includes: an annular stator core (e.g., stator core 11 in the embodiment); a plurality of groove-shaped slits (for example, slits 12 in the embodiment) provided at intervals in a circumferential direction of the stator core (for example, circumferential direction Dr in the embodiment) on an inner circumferential surface of the stator core, and each of the slits being continuous in an axial direction of the stator core (for example, axial direction Dc in the embodiment); and a plurality of coil segments (for example, coil segments 20 in the embodiment) arranged in the respective slits; and the coil segment includes: an insertion portion (for example, an insertion portion 21 in the embodiment) that extends in the axial direction and is inserted into the slit; a first extension portion (e.g., a first extension portion 22 in the embodiment) extending from a first end portion (e.g., a first end portion 21a in the embodiment) of the insertion portion in the axial direction to a circumferential direction side of the stator core; a second extending portion (e.g., a second extending portion 23 in the embodiment) extending from a second end portion (e.g., a second end portion 21b in the embodiment) in the axial direction of the insertion portion to the other side in the circumferential direction of the stator core; and an identification portion (e.g., identification portion 30A, identification portion 30B, identification portion 30C in the embodiment) that identifies a relative position of the coil segment with respect to the slit; the coil segment is arranged such that the identification portion coincides with a specific position of the stator core (for example, the second identification portion 40, the end portion 11e in the embodiment) in the axial direction.

According to the above configuration, the coil segment is provided such that the identification portion provided on the coil segment coincides with the specific position of the stator core in the axial direction. Thereby, the coil segments can be arranged in the axial direction with high accuracy with respect to the stator core. Therefore, the interference between the bent portions between the insertion portion and the first and second extension portions and the end portions of the stator core (slit) can be suppressed. Therefore, the insulating coating layer of the wire rod forming the coil segment can be prevented from interfering with the stator core and being damaged. As a result, even if the extra length of the insertion portion of the coil segment with respect to the slit is suppressed to be small, the coil segment can be attached to the slit while preventing the insulating coating layer from being damaged.

In the stator for a rotating electrical machine according to the present invention, it is preferable that a second identification portion (for example, a second identification portion 40 in an embodiment) is provided on an inner peripheral surface of the stator core, and the coil segment is disposed so that the identification portion and the second identification portion coincide with each other in the axial direction.

According to the above configuration, by providing the second identification portion on the stator core, the position of the identification portion of the coil segment with respect to the stator core can be easily identified. Therefore, the alignment of the coil segments in the axial direction with respect to the stator core can be easily performed.

In the stator for a rotating electrical machine according to the present invention, it is preferable that the coil segment is disposed so that the identification portion (for example, the identification portion 30B in the embodiment) and an end portion (for example, the end portion 11e in the embodiment) of the stator core in the axial direction coincide with each other in the axial direction.

According to the structure described above, the end portion in the axial direction of the stator core is used as the specific position for aligning the coil segment with the stator core. By aligning the identification portions of the coil segments with the end portions of the stator core in the axial direction, the coil segments can be arranged with high accuracy with respect to the stator core. Therefore, it is not necessary to provide a mark or the like for aligning the identification portion of the coil segment on the stator core side, and the coil segment can be aligned with high accuracy with a simple configuration, so that the cost can be reduced, and the insulating coating film can be reliably prevented from being damaged.

In the stator for a rotating electrical machine according to the present invention, it is preferable that the coil segments include the identification portions (for example, the identification portions 30B and 30C in the embodiment) on both sides in the axial direction, and are arranged such that the identification portions respectively coincide with the specific positions on both sides of the stator core in the axial direction.

According to the structure described above, the alignment of the coil segments with the stator core can be performed on both sides in the axial direction. This can reliably suppress interference between the coil segment and the slit, and reliably prevent damage to the insulating coating film.

[ effects of the utility model ]

According to the utility model discloses, can shorten the length of the wire rod that forms the coil section, realize the reduction of coil weight, material cost's reduction, the loss reduction of the eddy current of coil and production efficiency's improvement.

Drawings

Fig. 1 is a perspective view showing a stator for a rotating electric machine according to an embodiment of the present invention.

Fig. 2 is an enlarged perspective view showing a part of a stator for a rotating electric machine according to an embodiment of the present invention.

Fig. 3 is a view showing a layout of coil segments provided in slits in a stator for a rotating electric machine according to an embodiment of the present invention.

Fig. 4 is a perspective view showing a schematic configuration of a robot for manufacturing a stator for a rotating electric machine according to an embodiment of the present invention.

Fig. 5 is a flowchart showing a flow of a method for manufacturing a stator for a rotating electric machine according to an embodiment of the present invention.

Fig. 6 is a view showing a schematic configuration of a method for aligning the coil segment with the slits of the stator core in the axial direction according to the embodiment of the present invention.

Fig. 7 is a view showing a schematic configuration of a method of aligning the coil segment and the slits of the stator core in the axial direction in the first modification of the embodiment of the present invention.

Fig. 8 is a diagram showing a schematic configuration of a method of aligning the coil segment and the slits of the stator core in the axial direction in a second modification of the embodiment of the present invention.

[ description of symbols ]

10: stator for rotating electric machine

11: stator core

11 e: end part

11 f: end part

11 i: inner peripheral surface

12: slit

15: coil

20. 20A, 20B: coil segment

20 w: wire rod

21: insertion part

22. 22A, 22B: first extension part

23. 23A, 23B: second extension part

30A, 30B, 30C: identification part

40: second identification part

200: robot

205 a: image sensor with a plurality of pixels

Dc: axial direction

Dr: in the circumferential direction

S2, S3, S4: procedure (ii)

Detailed Description

Next, a stator for a rotating electric machine and a method of manufacturing the stator for a rotating electric machine according to embodiments of the present invention will be described with reference to the drawings.

Fig. 1 is a perspective view showing a stator 10 for a rotating electric machine according to an embodiment of the present invention. Fig. 2 is an enlarged perspective view showing a part of a stator 10 for a rotating electric machine according to an embodiment of the present invention.

As shown in fig. 1 and 2, the stator 10 for the rotating electric machine mainly includes an annular stator core 11 and a coil 15 provided on the stator core 11.

The stator core 11 is formed by stacking a plurality of annular electromagnetic steel plates, for example. A plurality of slits 12 arranged at equal intervals in the circumferential direction Dr of the stator core 11 are provided in the inner circumferential surface 11i of the stator core 11. The slits 12 are formed in a groove shape recessed in a substantially U-shape in cross section from the inner circumferential surface 11i of the stator core 11 to the outside in the radial direction of the stator core 11. The slits 12 extend in the axial direction Dc and continue from one end 11e to the other end 11f of the stator core 11 in the axial direction Dc. The slits 12 are open in the axial direction Dc at the end 11e and the end 11f of the stator core 11.

Fig. 3 is a diagram showing a layout of the coil segments 20 provided in the slits 12 in the stator 10 for a rotating electric machine according to the embodiment of the present invention.

As shown in fig. 2 and 3, the coil 15 includes a plurality of coil segments 20 provided on each of the plurality of slits 12 of the stator core 11. Each coil segment 20 is a so-called magnet wire (magnet wire) and includes a wire 20w composed of a conductor and an insulating coating film covering the conductor.

The coil segment 20 integrally includes an insertion portion 21 extending linearly, a first extension portion 22 extending from a first end portion 21a in the axial direction Dc of the insertion portion 21, and a second extension portion 23 extending from a second end portion 21b in the axial direction Dc of the insertion portion 21. Further, the coil segment 20 has a bent portion 24 between the first end portion 21a of the insertion portion 21 and the first extension portion 22, and has a bent portion 25 between the second end portion 21b of the insertion portion 21 and the second extension portion 23. The first extension portion 22 extends obliquely from the first end portion 21a of the insertion portion 21 to one side in the circumferential direction Dr of the stator core 11, and the second extension portion 23 extends obliquely from the second end portion 21b of the insertion portion 21 to the other side in the circumferential direction Dr. Thereby, the first extending portion 22 and the second extending portion 23 extend from the insertion portion 21 in mutually different directions in the circumferential direction Dr. That is, the coil segment 20 is crank-shaped.

Further, the coil segments 20 are provided in the slits 12 in a radially multiple-layered manner. In the coil segments 20 adjacent to each other in the radial direction of the stator core 11, the first extending portion 22 and the second extending portion 23 extend in different directions in the circumferential direction Dr.

Each coil segment 20 is disposed by inserting an insertion portion 21 into each slit 12. In a state where the insertion portion 21 is inserted into the slit 12 in each slit 12, the bent portion 24 and the first extending portion 22 are disposed outside the one end portion 11e of the stator core 11 in the axial direction Dc, and the bent portion 25 and the second extending portion 23 are disposed outside the other end portion 11f of the stator core 11 in the axial direction Dc.

Among the plurality of coil segments 20 held by the plurality of slits 12 provided in the circumferential direction Dr of the stator core 11, the coil segments 20 of the same electrical phase are joined to each other. That is, the coil 15 has a three-phase structure of U-phase, V-phase, and W-phase, and the plurality of coil segments 20 are electrically connected to each other in each of the U-phase, V-phase, and W-phase.

Among the plurality of coil segments 20 in the same phase, the first extension portion 22A of the coil segment 20A located on one side in the radial direction of the stator core 11 and the first extension portion 22B of the coil segment 20B located on the other side in the radial direction extend in directions different from each other in the circumferential direction Dr. Likewise, the second extending portion 23A of the coil segment 20A on the one radial side and the second extending portion 23B of the coil segment 20B on the other radial side extend in mutually different directions in the circumferential direction Dr.

The coil segments 20 of the same phase are joined to each other so that the first extending portion 22A and the tip portion 22s and the tip portion 23s of the second extending portion 23A of the coil segment 20A on one side in the radial direction overlap with each other and the tip portions 22t and 23t of the first extending portion 22B and the second extending portion 23B of the coil segment 20B on the other side in the radial direction overlap with each other. Here, the joining means that the insulating coating film of the conductor covering the wire 20w forming the coil segment 20A and the coil segment 20B is melted to electrically connect the conductors to each other.

As described above, the coil 15 is configured by repeating the joining of the plurality of coil segments 20 adjacent to each other in the radial direction of the stator core 11.

As shown in fig. 1, bus bars (bus bar)18 corresponding to the U-phase, V-phase, and W-phase are connected to the coil 15.

In the stator 10 for a rotating electric machine as described above, the coil segments 20 are provided with the identification portions 30A. The identification unit 30A is a member that matches the specific positions of the coil segments 20 and the stator core 11 in the axial direction Dc. In the present embodiment, the recognition portion 30A is provided, for example, at the center in the axial direction Dc of the insertion portion 21, and includes a linear mark (mark) Ma extending in the circumferential direction Dr. The recognition unit 30A is not limited to the linear mark Ma, and may be in other suitable forms such as a dot form.

A second recognition portion 40 is provided at a specific position of the stator core 11 as a reference for aligning the recognition portion 30A (mark Ma) of the coil segment 20. The second identification portion 40 is provided on the inner circumferential surface 11i of the stator core 11. The second identification portion 40 is provided on the inner peripheral surface 11i of the stator core 11 at the center of one end portion 11e and the other end portion 11f in the axial direction Dc, and includes a marker line Lm provided over the entire circumference in the circumferential direction.

The positions of the marker Ma and the marker line Lm are not limited to the axial center of the insertion portion 21 and the inner circumferential surface 11i of the stator core 11, and may be other positions set in advance.

Each coil segment 20 is a recognition portion 30A provided in the insertion portion 21, and is provided so that the position in the axial direction Dc coincides with the second recognition portion 40 provided on the inner circumferential surface 11i of the stator core 11. In a state where the positions of the recognition portion 30A and the second recognition portion 40 are aligned in the axial direction Dc, the first end portion 21a and the second end portion 21b of the insertion portion 21 of each coil segment 20 protrude uniformly to both sides in the axial direction Dc of the slit 12. The bent portion 24 and the first extending portion 22, and the bent portion 25 and the second extending portion 23 are disposed with a minimum gap in the axial direction Dc so as to be out of contact with the end portions 11e and 11f of the stator core 11.

As shown in fig. 4, such a coil segment 20 is assembled to the stator core 11 using a robot 200. The robot 200 includes a hand (hand) 201 for holding the coil segment 20, an arm (arm) 202 for moving the hand 201, and a camera (camera) 205.

The hand 201 is capable of holding the coil segment 20. The hand 201 may also be provided with a plurality of groups.

The arm 202 moves the hand 201 to a predetermined position under the control of the robot controller 203. The arm portion 202 includes at least a radial actuator (activator) 202a for moving the hand portion 201 in the radial direction of the stator core 11, an axial actuator 202b for moving the hand portion 201 in the axial direction Dc of the stator core 11, and a circumferential actuator (not shown) for relatively moving the coil segment 20 held by the hand portion 201 and the stator core 11 in the circumferential direction Dr.

The camera 205 photographs a recognition unit 30A and a second recognition unit 40, the recognition unit 30A being provided on the coil segment 20 held by the hand 201, the second recognition unit 40 being provided on the inner peripheral surface 11i of the stator core 11. The camera 205 includes an image sensor 205a and an image processing unit 205 b. The image sensor 205a recognizes the positions of the recognition unit 30A and the second recognition unit 40 in the captured image. The image processing unit 205b detects the amount of positional deviation in the axial direction Dc between the recognition unit 30A and the second recognition unit 40 based on the positions of the recognition unit 30A and the second recognition unit 40 recognized by the image sensor 205 a.

The robot control unit 203 controls the robot 200 based on the amount of positional deviation in the axial direction Dc between the recognition unit 30A and the second recognition unit 40 detected by the image processing unit 205b, and corrects the movement (position) of the arm 202.

Next, a method of manufacturing the stator 10 for the rotating electric machine as described above will be described.

Fig. 5 is a flowchart showing a flow of a method for manufacturing a stator for a rotating electric machine according to an embodiment of the present invention. Fig. 6 is a view showing a schematic configuration of a method for aligning the coil segment with the slits of the stator core in the axial direction according to the embodiment of the present invention.

As shown in fig. 5, in order to manufacture the stator 10 for the rotating electric machine, first, the coil segments 20 and the stator core 11 are provided with the identification portions 30A and the second identification portions 40 (step S1).

In the manufacturing process of the coil segment 20, the coil segment 20 is formed into a predetermined shape by press working or the like, and then ink is applied to the center of the insertion portion 21 in the axial direction Dc by a laser printer or the like to form a mark Ma as the identification portion 30A. In the manufacturing process of the stator core 11, after the stator core 11 is formed into a predetermined shape, ink is continuously applied linearly to the inner circumferential surface 11i of the stator core 11 in the circumferential direction Dr by a laser printer or the like, thereby forming a marking line Lm as the second identification portion 40.

The positions of the marker Ma and the marker line Lm are not limited to the center of the insertion portion 21 and the inner circumferential surface 11i of the stator core 11 in the axial direction Dc, and may be other positions in the axial direction Dc. The method of forming the mark Ma and the mark line Lm is not limited to the laser printer, and other methods are possible. Step S1 of providing identification portion 30A and second identification portion 40 may be performed in advance at a place different from the place where stator 10 for the rotating electric machine is manufactured.

Next, the plurality of coil segments 20 are sequentially assembled to the stator core 11 provided with the second identification portion 40. The stator core 11 is placed on a workpiece holding table, not shown. The robot 200 holds the coil segment 20 to be assembled to the stator core 11 by the hand 201. Next, the arm 202 is operated to face the coil segment 20 held by the hand 201 and the predetermined slit 12 of the stator core 11 with a space in the radial direction.

In this state, the recognition unit 30A and the second recognition unit 40 are recognized by the camera 205 (step S2).

As shown in fig. 6, the recognition portion 30A (mark Ma) of the coil segment 20 held by the hand 201 and the second recognition portion 40 (mark line Lm) provided on the inner circumferential surface 11i of the stator core 11 are photographed by the camera 205. The image sensor 205a of the camera 205 recognizes the positions of the recognition unit 30A and the second recognition unit 40 in the captured image. The image processing unit 205b detects the amount of positional deviation in the axial direction Dc between the recognition unit 30A and the second recognition unit 40 in the captured image.

Next, based on the recognition results of the recognition portions 30A and 40 in step S2, the coil segments 20 are aligned with the stator core 11 (step S3).

The robot control unit 203 controls the arm 202 of the robot 200 based on the amount of positional deviation in the axial direction Dc between the recognition unit 30A and the second recognition unit 40 detected by the image processing unit 205 b. Thus, the robot 200 moves the coil segment 20 by the axial actuator 202b, and adjusts the position in the axial direction Dc so that the position in the axial direction Dc of the recognition portion 30A of the coil segment 20 held by the hand 201 matches the second recognition portion 40 of the stator core 11.

Thereafter, the robot 200 moves the coil segment 20 in the radial direction by the radial actuator 202a while keeping the position of the recognition portion 30A in the axial direction Dc in accordance with the second recognition portion 40 of the stator core 11, and inserts the insertion portion 21 into the predetermined slit 12 (step S4).

The above-described steps S2 to S4 are repeated in this order while the hand 201 holding the coil segment 20 and the stator core 11 are rotated relative to each other in the circumferential direction, whereby a predetermined number of coil segments 20 are assembled into all the slits 12 of the stator core 11.

After the insertion portion 21 is inserted into the slit 12, each coil segment 20 is joined to the other coil segments 20, the tip portions 22s and 22t of the first extending portion 22 and the tip portions 23s and 23t of the second extending portion 23 by laser welding or the like.

Thereby, the assembly of the stator 10 for the rotating electric machine is completed.

In the stator for a rotating electrical machine 10 and the method of manufacturing the stator for a rotating electrical machine 10 as described above, the coil segment 20 is provided so that the identification portion 30A provided on the coil segment 20 and the second identification portion 40 (specific position) of the stator core 11 coincide with each other in the axial direction Dc. Thereby, the coil segments 20 are arranged with high accuracy in the axial direction Dc with respect to the stator core 11. Therefore, the bent portions 24 and 25 between the insertion portion 21 and the first and second extending portions 22 and 23 can be prevented from interfering with the end portions 11e and 11f of the stator core 11 (the slit 12).

As described above, the stator 10 for the rotating electric machine includes: an annular stator core 11; a plurality of groove-shaped slits 12 provided at intervals in the circumferential direction Dr of the stator core 11 on the inner circumferential surface 11i of the stator core 11, each of the slits being continuous in the axial direction Dc of the stator core 11; and a plurality of coil segments 20 arranged on the respective slits 12. The coil segment 20 includes: an insertion portion 21 extending in the axial direction Dc and inserted into the slit 12; a first extending portion 22 extending from the first end portion 21a in the shaft direction Dc to the circumferential direction Dr side of the stator core 11; a second extending portion 23 extending from the second end portion 21b in the shaft direction Dc to the other side in the circumferential direction Dr of the stator core 11; and a recognition unit 30A for recognizing the relative position of the coil segment 20 with respect to the slit 12. The coil segment 20 is disposed such that the identification portion 30A coincides with the specific position of the stator core 11 in the axial direction Dc.

With the above-described configuration, the coil segments 20 can be arranged with high accuracy in the axial direction Dc with respect to the stator core 11. Therefore, the bent portions 24 and 25 between the insertion portion 21 and the first and second extending portions 22 and 23 can be prevented from interfering with the end portions of the stator core 11 (the slits 12). This can prevent the insulating coating layers of the wires 20w forming the coil segment 20 from interfering with the stator core 11 and being damaged. As a result, even if the extra length of the insertion portion 21 of the coil segment 20 with respect to the slit 12 is suppressed to be small, the coil segment 20 can be attached to the slit 12 while preventing the insulating coating layer from being damaged. Therefore, the length of the wire rod 20w forming the coil segment 20 can be shortened, and the weight of the coil 15, the material cost, the eddy current loss of the coil 15, and the production efficiency can be improved.

In the stator 10 for the rotating electric machine, the second identification portion 40 is provided on the inner circumferential surface 11i of the stator core 11, and the coil segment 20 is disposed such that the identification portion 30A and the second identification portion 40 coincide with each other in the axial direction Dc.

According to the structure as described above, by providing the second recognition portion 40 as the specific position of the stator core 11, the position of the recognition portion 30A of the coil segment 20 with respect to the stator core 11 can be easily recognized. Therefore, the alignment of the coil segments 20 in the axial direction Dc with respect to the stator core 11 can be easily performed.

The method of manufacturing the stator 10 for the rotating electric machine is the method of manufacturing the stator 10 for the rotating electric machine described above, and includes: a step S3 of aligning the identification portion 30A of the coil segment 20 with a specific position of the stator core 11; and a step S4 of inserting the insertion portion 21 of the coil segment 20 into the slit 12.

With the above-described configuration, the coil segments 20 can be arranged with high accuracy in the axial direction Dc with respect to the stator core 11. Therefore, the insulating coating layer of the wire rod 20w forming the coil segment 20 can be prevented from interfering with the stator core 11 and being damaged. As a result, the stator 10 for the rotating electric machine can be provided, which can rotate while reducing the weight of the coil 15, reducing the material cost, reducing the eddy current loss of the coil 15, and improving the production efficiency.

The method for manufacturing the stator 10 for the rotating electric machine includes a step S2 of recognizing the position of the identification portion 30A of the coil segment 20 and the specific position of the stator core 11 by the image sensor 205 a. In the step S3 of aligning the coil segment 20, the position of the robot 200 holding the coil segment 20 is corrected based on the position of the identification portion 30A of the coil segment 20 and the position of the specific position of the stator core 11 recognized by the image sensor 205a, and the identification portion 30A of the coil segment 20 is aligned with the specific position of the stator core 11.

According to the above-described configuration, the coil segments 20 can be aligned with high efficiency and high accuracy by aligning the coil segments 20 with the stator core 11 in the axial direction Dc by the image sensor 205 a.

In the above embodiment, the identification portion 30A provided on the coil segment 20 and the second identification portion 40 provided on the stator core 11 are aligned so as to be aligned in the axial direction Dc, but the present invention is not limited to this.

(first modification of embodiment)

For example, as shown in fig. 7, a recognition portion 30B (mark Mb) may be provided at one end of the insertion portion 21 of the coil segment 20, and the coil segment 20 may be attached to the slit 12 of the stator core 11 by aligning the recognition portion 30B with the end 11e of the stator core 11 in the axial direction Dc so as to match the axial direction Dc.

In the modification of the embodiment, the coil segments 20 are arranged such that the identification portions 30B coincide with the end portions 11e of the stator core 11 in the axial direction Dc. According to the structure described above, the end portion 11e in the axial direction Dc of the stator core 11 is used as a specific position for aligning the coil segment 20 with the stator core 11. Thus, the coil segment 20 can be arranged with high accuracy with respect to the stator core 11 by aligning the identification portion 30B of the coil segment 20 with the end portion 11e of the stator core 11 in the axial direction Dc. Therefore, it is not necessary to provide the second identification portion 40 and the like as described in the above embodiments as a specific position for aligning the identification portions 30B of the coil segments 20 on the stator core 11 side, and it is possible to perform highly accurate alignment of the coil segments 20 with a simple configuration. Therefore, the cost can be further reduced.

(second modification of embodiment)

For example, as shown in fig. 8, the recognition portions 30B and 30C (marks Mb and Mc) may be provided at both ends of the insertion portion 21 of the coil segment 20 in the axial direction Dc. The coil segments 20 are attached to the slits 12 of the stator core 11 by aligning the recognition portions 30B and 30C with both the end portions 11e and 11f of the stator core 11 in the axial direction Dc so as to match each other in the axial direction Dc. At this time, cameras 205 are disposed on both sides of the stator core 11 in the axial direction Dc for recognizing the recognition portion 30B and the end portion 11e of the stator core 11 and recognizing the recognition portion 30C and the end portion 11f of the stator core 11.

In the modification of the embodiment, the coil segment 20 includes the identification portions 30B and 30C on both sides in the axial direction Dc, and the identification portions 30B and 30C are arranged so as to coincide with the specific positions on both sides in the axial direction Dc of the stator core 11.

According to the structure described above, the end portions 11e, 11f in the axial direction Dc of the stator core 11 are used as the specific positions for aligning the coil segments 20 with the stator core 11. Thereby, the alignment of the coil segments 20 with the stator core 11 can be performed on both sides in the axial direction Dc. Therefore, it is not necessary to provide the second identification portion 40 and the like as described in the above embodiments as a specific position for aligning the identification portions 30B of the coil segments 20 on the stator core 11 side, and it is possible to perform highly accurate alignment of the coil segments 20 with a simple configuration.

(other embodiments)

The present invention is not limited to the above embodiments, and includes various modifications to the above embodiments without departing from the scope of the present invention.

For example, the structure of each part of the stator 10 for the rotating electric machine may be appropriately changed. The structure of the rotating electric machine including the stator 10 for the rotating electric machine is not limited at all.

In addition, the configuration described in the above embodiment may be selected or changed as appropriate to another configuration without departing from the gist of the present invention.

Claims

1. A stator for a rotating electric machine, characterized by comprising:

an annular stator core;

a plurality of slot-like slits provided at intervals in a circumferential direction of the stator core on an inner circumferential surface of the stator core, the slots being continuous in an axial direction of the stator core; and

a plurality of coil segments disposed in the slits; and is

The coil segment includes:

an insertion portion extending in the axial direction and inserted into the slit;

a first extending portion extending from a first end portion of the insertion portion in an axial direction to a circumferential direction side of the stator core;

a second extending portion that extends from a second end portion in the axial direction of the insertion portion to the other side in the circumferential direction of the stator core; and

an identification section that identifies a relative position of the coil segment with respect to the slit;

the coil segment is disposed such that the identification portion and a part of the stator core are aligned in the axial direction.

2. A stator for a rotating electric machine according to claim 1,

a second identification portion is provided on an inner peripheral surface of the stator core,

the coil segment is disposed such that the identification portion and the second identification portion are aligned in the axial direction.

3. A stator for a rotating electric machine according to claim 1,

the coil segment is arranged such that the identification portion and an end portion of the stator core in the axial direction coincide with each other in the axial direction.

4. A stator for a rotating electric machine according to any of claims 1 to 3,

the coil segments include the identification portions on both sides in the axial direction, respectively, and

the identification portions are arranged so as to be respectively aligned with the portions of the stator core on both sides in the axial direction.