JP6804376B2 - Manufacturing method of stator core of rotary electric machine and stator core of rotary electric machine - Google Patents

Description

The present invention relates to a stator core of a rotary electric machine for preventing coil winding disorder and a method for manufacturing a stator core of a rotary electric machine.

The stator core of a conventional rotary electric machine is caulked on the back yoke side of the teeth part in order to reduce crack defects, cogging torque, noise, and vibration that occur when the insulating winding frame is fitted due to poor tolerance of the laminated product thickness. A part is provided, and a protrusion different from the caulking part for adjusting the product thickness is provided inside the caulking part in the radial direction of the tooth part, and the product thickness of one core member or less is adjusted. It has been proposed (see, for example, Patent Document 1).

International Publication No. WO2011 / 77830

Since the stator core of a conventional rotary electric machine has a protrusion different from the caulking part at a place where the coil is not arranged, the product thickness of the stator core can be adjusted, but the tension that pulls the lead wire at the time of winding. Therefore, there is a problem that the interlayer gap on the side opposite to the back yoke portion is shrunk, and as a result, a gap is generated between the winding frame and the lead wire, and the winding disorder of the lead wire is generated.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a stator core of a rotary electric machine and a method of manufacturing a stator core of a rotary electric machine to prevent coil winding disorder.

A stator core having a plurality of teeth portions formed so as to project in the radial direction of the stator core of the rotary electric machine of the present invention at intervals in the circumferential direction and having a back yoke portion magnetically connecting each of the tooth portions in the circumferential direction. ,
An insulating winding frame arranged in the teeth portion and
In the stator core of a rotary electric machine provided with a coil wound around the teeth portion via the winding frame.
A core member made of an electromagnetic steel plate is formed by laminating a plurality of core members in the axial direction.
All the core members have a first uneven portion that connects the core members that are axially adjacent to the back yoke portion.
At least one of the core members has a second uneven portion having a convex uneven height lower than the convex uneven height of the first concave- convex portion at a location where the coil is arranged in the tooth portion.
Said core member in the axial direction of the convex portion of the second concave-convex portion of the core member having the second uneven portion is formed, the convex portion of the second concave-convex portion in the axial direction of the tooth portion It has a base surface of the teeth portion in which the second uneven portion is not formed at the formed portion.
Further, the method for manufacturing the stator core of the rotary electric machine of the present invention is as follows.
The number of the core members in which the second uneven portion is formed is adjusted so as to obtain a desired interlayer gap, and the layers are laminated.

According to the method for manufacturing the stator core of a rotary electric machine and the stator core of a rotary electric machine of the present invention, it is possible to prevent the coil from being disturbed.

It is a perspective view which shows the structure of the stator of the rotary electric machine of Embodiment 1 of this invention. It is a figure which shows the manufacturing method of the split core of the stator shown in FIG. It is a figure which shows the manufacturing method of the split core of the stator shown in FIG. It is a figure which shows the manufacturing method of the split core of the stator shown in FIG. It is a figure which shows the manufacturing method of the split core of the stator shown in FIG. It is a figure which shows the manufacturing method of the split core of the stator shown in FIG. It is a figure which shows the manufacturing method of the split core of the stator shown in FIG. It is a figure which shows the manufacturing method of the stator shown in FIG. It is a figure which shows the manufacturing method of the stator shown in FIG. It is a figure which shows the manufacturing method of the stator shown in FIG. It is a figure which shows the manufacturing method of the stator shown in FIG. It is a figure which shows the manufacturing method of the stator shown in FIG. It is a figure which shows the manufacturing method of the stator of the comparative example. It is a figure which shows the manufacturing method of the stator of the comparative example. It is a top view which shows the structure of the 2nd core member of the stator of the rotary electric machine of Embodiment 2 of this invention. It is a top view which shows the other structure of the 2nd core member of the stator of the rotary electric machine of Embodiment 2 of this invention. It is a top view which shows the structure of the 2nd core member of the stator of the rotary electric machine of Embodiment 3 of this invention. It is a figure which shows the manufacturing method of the stator using the 2nd core member shown in FIG. It is a top view which shows the other structure of the 2nd core member of the stator of the rotary electric machine of Embodiment 3 of this invention.

Embodiment 1.
Hereinafter, embodiments of the present invention will be described. In the following description, each direction in the rotary electric machine is shown as a circumferential direction Z, an axial direction Y, a radial direction X, an outer side X1 of the radial direction X, and an inner side X2 of the radial direction X, respectively. Therefore, in other parts as well, each direction will be described with reference to these directions.

FIG. 1 is a perspective view showing a configuration of a rotary electric machine stator using the rotary electric machine stator core according to the first embodiment of the present invention. 2 to 7 are views for explaining a method of manufacturing one divided core of the stator core shown in FIG. 1. FIG. 2 is a perspective view showing a configuration of a core member of the split core of the stator core shown in FIG. FIG. 3 is a plan view showing the configuration of the second core member as one of the core members shown in FIG. FIG. 4 is a plan view showing the configuration of the first core member as one of the core members shown in FIG.

FIG. 5 is a plan view showing a configuration of a third core member as one of the core members shown in FIG. FIG. 6 is a side view showing the configurations of the first core member, the second core member, and the third core member shown in FIGS. 3 to 5. FIG. 7 is a side view showing the configuration of the core member of the split core shown in FIG. 8 to 10 are views for explaining a method of manufacturing a stator using the split core shown in FIG. 2. 8 and 9 are views showing a state in which a winding frame is installed on the split core shown in FIG.

FIG. 10 is a perspective view showing a state in which a coil is wound around a split core in which the winding frame shown in FIG. 9 is installed. 11 and 12 are side views for explaining the effect of the first embodiment. 13 and 14 are side views showing a comparative example for comparison with the first embodiment. It should be noted that the side view in the present embodiment shows the relationship between each uneven portion and the opening so as to be clear, and does not show one side surface in the radial direction X.

In FIG. 1, the stator 1 of a rotary electric machine includes a stator core 10, a winding frame 7, and a coil 8. The stator core 10 is formed in an annular shape by arranging a plurality of divided cores 11 in the circumferential direction Z. As shown in FIG. 2, the divided core 11 is formed by laminating a core member 2 made of a plurality of electromagnetic steel plates in the axial direction Y. The core member 2 has a tooth portion 12 and a back yoke portion 13. The tooth portion 12 is formed so as to project from the central portion of the back yoke portion 13 in the circumferential direction Z to the inside X2 in the radial direction X. The teeth portion 12 has a shoe portion 14. The shoe portion 14 is formed at the inner X2 end of the tooth portion 12 in the radial direction X so as to project in the circumferential direction Z.

The back yoke portion 13 is formed at the outer X1 end of the tooth portion 12 in the radial direction X so as to project in the circumferential direction Z, and the outer circumference of the outer X1 in the radial direction X is formed in an arc shape. The back yoke portion 13 magnetically connects the tooth portions 12 adjacent to each other in the circumferential direction Z in the circumferential direction Z. Therefore, the stator core 10 formed by the plurality of divided cores 11 has a plurality of tooth portions 12 at intervals in the circumferential direction Z.

The winding frame 7 is arranged on the teeth portion 12 and is formed of an insulating member. As shown in FIG. 9, the winding frame 7 is formed by the first winding frame 71, the second winding frame 72, and the third winding frame 73. The first winding frame 71 and the second winding frame 72 cover the upper and lower end surfaces of the tooth portion 12 in the axial direction Y, respectively. The third winding frame 73 covers both side surfaces of the tooth portion 12 in the axial direction Y. The third winding frame 73 is inserted into and fixed to the insertion claws 70 formed in the first winding frame 71 and the second winding frame 72. As shown in FIG. 10, the coil 8 is formed by winding a lead wire 80 around a tooth portion 12 via a winding frame 7.

The core member 2 has a first core member 21, a second core member 22, and a third core member 23. As shown in FIG. 4, the first core member 21 has a first uneven portion 3 that connects core members 2 adjacent to each other in the axial direction Y to the back yoke portion 13, and the tooth portion 12 does not have an uneven portion. .. As shown in FIG. 3, the second core member 22 has a first uneven portion 3 that connects the core members 2 adjacent to each other in the axial direction Y to the back yoke portion 13, and the location where the coil 8 of the teeth portion 12 is arranged. Has a second uneven portion 4 on the surface. The first uneven portion 3 is formed by a concave portion 31 on the upper surface side in the axial direction Y and a convex portion 32 on the lower surface side in the axial direction.

As shown in FIG. 5, the third core member 23 has an opening 5 that fits into the convex portion 32 of the first uneven portion 3 that connects the core members 2 adjacent to each other in the axial direction Y to the back yoke portion 13. However, the teeth portion 12 does not have an uneven portion. The upper and lower surfaces in the axial direction Y in which the irregularities of the core members 21, 22, and 23 are not formed are used as the foundation surface. As shown in FIGS. 3 to 5, the first core member 21, the second core member 22, and the third core member 23 are formed by punching out an electromagnetic steel plate, and have substantially the same planar shape when viewed from the axial direction Y. Is formed by.

The first core member 21, the first uneven portion 3 of the second core member 22, and the opening 5 of the third core member 23 are formed at two locations in the circumferential direction Z of the back yoke portion 13. The first uneven portion 3 and the opening portion 5 do not have to be formed at two locations in the back yoke portion 13, but may be formed at one location at the central portion of the back yoke portion 13 in the circumferential direction Z.

The second uneven portion 4 of the second core member 22 is formed in a round shape. The second uneven portion 4 of the second core member 22 is formed on the tooth portion 12 at three locations at different positions in the radial direction X and two locations at different positions in the circumferential direction Z, for a total of six locations. Although an example in which the second uneven portion 4 is formed at all six positions is shown, when the cross-sectional area ratio of the second uneven portion 4 becomes large with respect to the shape of the divided core 11, the iron loss increases and the motor efficiency decreases. Therefore, it is desirable to reduce the circumference and the number of round shapes as much as possible and reduce the cross-sectional area ratio of the second uneven portion 4. From this, it is conceivable that the second uneven portion 4 is formed at one location where the coil 8 of the teeth portion 12 is arranged.

As shown in FIG. 6, the uneven height H2 of the second uneven portion 4 of the second core member 22 is formed lower than the uneven height H1 of the first uneven portion 3. As shown in FIG. 6, the uneven height described in the present embodiment indicates the height of the portion of the second uneven portion 4 that protrudes from the foundation surface of the second core member 22. Then, in the split core 11, the first core member 21 is laminated so that the first core member 21 is laminated on the Y side in the axial direction in which the convex portion of the second uneven portion 4 of the second core member 22 is formed. The second core member 22 and the third core member 23 are laminated in the axial direction Y as shown in FIG. An interlayer gap 6 is formed between the laminated layers of the core members 21, 22, and 23. Then, the number of the first core member 21 and the second core member 22 is appropriately set and laminated so as to have a desired interlayer gap 6. In the following description, when all of the first core member 21, the second core member 22, and the third core member 23 are targeted, they may be collectively described as the core member 2.

Next, a method of manufacturing the stator 1 of the rotary electric machine according to the first embodiment configured as described above will be described. First, a method of manufacturing the split core 11 will be described. The plate-shaped core member 2 is punched out from the strip-shaped member slit to the required width from the base material of the electromagnetic steel plate. Then, a plurality of punched plate-shaped core members 2 are stacked in the axial direction Y, which is the plate thickness direction, to form the divided core 11. Specifically, as shown in FIG. 7, the third core member 23 is punched out in order from the lower side in the axial direction Y, and then the first core member 21, the second core member 22, ... It is punched out and laminated. This punching is repeated, and when the number of stacked core members 2 reaches a predetermined stacking thickness, the split core 11 is discharged from the die and formed.

At this time, the convex portion 32 of the first uneven portion 3 of the first core member 21 is fitted into the opening 5 of the third core member 23. Further, in the core member 2 at other locations, the convex portion 32 of the core member 2 adjacent to the concave portion 31 of the first uneven portion 3 is fitted in the concave portion 31 in the axial direction Y. As a result, the core members 2 laminated in the axial direction Y are caulked and connected by the first uneven portion 3. Further, an interlayer gap 6 is formed between the laminated core members 2. At this time, in order for the first uneven portion 3 to maintain the function as caulking, the uneven height H2 of the second uneven portion 4 is lower than the uneven height H1 of the first uneven portion 3, and the first uneven portion 3 and Are formed in different positions. Therefore, the connection of the core members 2 adjacent to each other in the axial direction Y in the axial direction Y by the first uneven portion 3 is maintained regardless of the presence or absence of the formation of the second uneven portion 4.

Further, the number of laminated layers of the first core member 21 and the second core member 22 is appropriately set so that the interlayer gap 6 is desired when the coil 8 is formed, which will be described later. Then, the second core member 22 is intermittently laminated. Specifically, on the axial Y side where the convex portion of the second uneven portion 4 of the second core member 22 is formed, here, on the lower side of the axial direction Y, the teeth portion 12 has only the base surface. The core members 21 are laminated. Further, as shown in FIG. 7, it is conceivable that the first core member 21 has a portion continuously laminated in the axial direction Y.

Next, as shown in FIG. 8, the first winding frame 71 and the second winding frame 72 are installed on the upper and lower end surfaces of the split core 11 in the axial direction Y, respectively. Next, as shown in FIGS. 9 and 11, the third winding frame 73 is inserted into and fixed to the insertion claws 70 formed in the first winding frame 71 and the second winding frame 72. Next, as shown in FIG. 10, the lead wire 80 is wound around the teeth portion 12 via the winding frame 7, and the coil 8 is formed. At the time of this winding, as shown in FIG. 12, the split core 11 is compressed in the axial direction Y by the tension 20 that pulls the lead wire 80. As is clear from FIG. 12, the tension 20 causes a large core shrinkage gradually from the outer side X1 to the inner side X2 in the radial direction X of the tooth portion 12. The term "core shrinkage" as used herein means that the interlayer gap 6 existing between the axial directions Y of the core member 2 shrinks in the axial direction Y.

However, at the location where the coil 8 of the teeth portion 12 is arranged, the second core member 22 having the second uneven portion 4 in the teeth portion 12 is arranged, and the uneven portion exists in the teeth portion 12 on the lower side in the axial direction Y. Since the first core member 21 having only the foundation surface is laminated, the second uneven portion 4 of the second core member 22 comes into contact with the foundation surface of the teeth portion 12 of the first core member 21 to wind the coil. The interlayer gap 62 can be maintained even when it receives a force of tension 20 that pulls the lead wire 80 during rotation.

As a result, it is possible to control the amount of inclination due to the difference in product thickness in the axial direction Y generated from the outer side X1 to the inner side X2 in the radial direction X of the tooth portion 12 generated by the core shrinkage during winding. Therefore, the gap 9 between the winding frame 7 and the lead wire 80 due to the core shrinkage can be adjusted so that the lead wire 80 does not slip. Further, by adjusting the amount of core shrinkage, it is possible to prevent the third winding frame 73 from being exposed from the insertion claw 70.

Therefore, the second uneven portion 4 of the second core member 22 has the shape and the number of arrangements so that the effect as shown above can be obtained, that is, the tension 20 for pulling the lead wire 80 at the time of winding does not become a yield stress. Is set and formed at a position where the coil 8 of the teeth portion 12 is arranged.

In order to clarify the effect of the first embodiment shown above, a comparative example corresponding to FIGS. 11 and 12 will be described with reference to FIGS. 13 and 14. In the comparative example, as shown in FIG. 13, a split core is formed by the third core member 23 on the lowermost side in the axial direction Y and the first core member 21 on the other side. The connection of the first core member 21 and the third core member 23 in the axial direction Y is connected by the opening 5 and the first uneven portion 3 in the same manner as in the first embodiment. Then, an interlayer gap 6 is formed between the first core member 21 and the third core member 23. Further, the winding frames 71, 72, and 73 are similarly installed in the teeth portion 12.

Then, as shown in FIG. 14, the lead wire 80 is wound to form a coil. The tension 20 that pulls the lead wire 80 during this winding is generated in the same manner as in the first embodiment. However, in the comparative example, unlike the first embodiment, the inter-story gap 6 causes a larger core shrinkage from the outer side X1 in the radial direction X of the teeth portion 12 toward the inner side X2 due to the tension 20, and the inner side X2 in the radial direction X2. The interlayer gap 61 is almost eliminated. This is because the back yoke portion 13 is formed with the first uneven portion 3, and the tooth portion 12 is formed with the uneven portion, although the interlayer gap remains due to the existence of the connection strength between the core members in the axial direction Y. This is because the interlayer gap 61 is almost eliminated.

Therefore, a large difference in the product thickness in the axial direction Y occurs between the outer side X1 and the inner side X2 of the tooth portion 12 in the radial direction X, and the lead wire 80 is loosened, so that the lead wire 80 is tilted between the winding frame 7 and the lead wire 80. A large gap 90 is formed by the above. Then, the lead wire 80 slides into the gap 90 between the winding frame 7 and the lead wire 80, causing winding disorder. Further, due to this phenomenon, the third winding frame 73 inserted in the insertion claw 70 may pop out into the winding region of the coil 8. As a result, the third winding frame 73 may interfere with the lead wire 80 to cause winding disorder.

According to the method for manufacturing the stator core of the rotary electric machine and the stator core of the rotary electric machine according to the first embodiment configured as described above, the teeth portion receives tension for pulling the lead wire at the time of winding for forming the coil. Since the second core member having the second uneven portion at the arrangement position of the coil of the tooth portion is intermittently laminated with the first core member, it is possible to maintain an interlayer gap between the core members adjacent in the axial direction. Therefore, it is possible to reduce the gap generated between the winding frame and the conducting wire, which is caused by the difference in the amount of core shrinkage between the back yoke portion and the teeth portion of the stator core in the winding of the conducting wire at the time of coil formation, and thereby the coil winding disorder. Can be prevented.

Further, since it is formed by the first core member and the second core member, the formation portion of the second uneven portion can be minimized, so that the cross-sectional area ratio in the second uneven portion can be reduced, and the iron loss can be reduced. Can be prevented from increasing, and the decrease in motor efficiency can be prevented.

Further, since the shape of the second uneven portion is round, it is possible to easily manufacture a punch for a press punching die, prevent an increase in iron loss, and prevent a decrease in motor efficiency.

In the first embodiment, an example in which the first core member and the second core member are used as the core members has been shown, but the present invention is not limited to this, and all core members are axially connected to the back yoke portion. A first uneven portion that connects adjacent core members is formed. Of all the core members, at least one core member forms a second uneven portion having a concave-convex height lower than the uneven height of the first concave-convex portion at the location where the coil of the tooth portion is arranged. Further, the core member on the axial direction on which the convex portion of the second uneven portion of the core member having the second uneven portion is formed is a portion where the convex portion of the second uneven portion is formed in the axial direction of the teeth portion. The same effect can be obtained as long as it has a basic surface of the teeth portion on which the second uneven portion is not formed.

As another specific example, an example in which a plurality of types of second core members having a second uneven portion are provided can be considered. A different type of second that forms three radial second concavo-convex portions at the central portion of the six second concavo-convex portions in the circumferential direction, which is different from the second concavo-convex portion of the second core member shown in FIG. Use a core member. In this case, if different types of second core members are alternately laminated, the portion of the tooth portion in which the convex portion of the second uneven portion is formed in the axial direction of the tooth portion does not have the second uneven portion. Since there is a basic surface, the same effect as that of the above embodiment can be obtained.

Embodiment 2.
FIG. 15 is a plan view showing the configuration of the second core member according to the second embodiment of the present invention. FIG. 16 is a plan view showing another configuration of the second core member according to the second embodiment of the present invention. In the second embodiment, an example of the second core member 22 having the second uneven portion 4 having a different shape and arrangement from the second uneven portion 4 of the first embodiment will be described. The other parts are the same as those in the first embodiment, and the same parts are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 15, the second uneven portion 41 of the second core member 22 is formed in an oval shape so that the longitudinal direction is the radial direction X. The second uneven portion 41 is formed at two locations symmetrically in the circumferential direction Z on the tooth portion 12.

Further, as shown in FIG. 16, the second uneven portion 42 of the second core member 22 is formed in an oval shape so that the longitudinal direction is the circumferential direction Z. The second uneven portion 42 is formed at two locations on the tooth portion 12 at intervals in the radial direction X. The second uneven portions 41 and 42 formed at the two locations formed as shown in FIGS. 15 and 16 have the same cross-sectional area as the second uneven portions 4 formed at the six locations of the first embodiment. Formed in proportion.

According to the method for manufacturing the stator core of the rotary electric machine and the stator core of the rotary electric machine according to the second embodiment configured as described above, the same effect as that of the first embodiment is obtained, and of course, the first embodiment is obtained. In order to obtain the same cross-sectional area ratio as the second uneven portion of the above, it can be dealt with by forming the second uneven portion at two places. Therefore, the number of punches for forming the second uneven portion of the press punching die for forming the second core member can be reduced as compared with the first embodiment, and the case of the first embodiment Therefore, low-cost manufacturing becomes possible.

As another example, as the second core member 22, the second core member 22 having the second uneven portion 41 shown in FIG. 15 and the second core member 22 having the second uneven portion 42 shown in FIG. 16 An example of using a plurality of types of is conceivable. In this case, if the second core members 22 of different types shown in FIGS. 15 and 16 are alternately laminated, the convex portions of the second uneven portions 41 and 42 are formed in the axial direction Y of the teeth portion 12. Since the basic surface of the teeth portion 12 on which the second uneven portions 41 and 42 are not formed exists in a part thereof, the same effect as that of the above embodiment can be obtained.

Embodiment 3.
In each of the above embodiments, an example is shown in which the heights of the unevenness in the second uneven portion of the second core member are all formed at the same height, but the present invention is not limited to this, and the height of the second uneven portion is not limited to this. A case where the uneven heights are formed at different heights will be described. Since the configuration of the second uneven portion other than the uneven height is the same as that of each of the above embodiments, the description thereof will be omitted as appropriate.

FIG. 17 is a side view showing the configuration of the second core member according to the third embodiment of the present invention. FIG. 17 shows an example in which a second uneven portion is formed in a planar shape, similar to the configuration shown in FIG. 3 of the first embodiment. FIG. 18 is a side view illustrating the effect of the split core using the second core member shown in FIG. FIG. 19 is a side view showing another configuration of the second core member according to the third embodiment of the present invention. FIG. 19 shows an example in which a second uneven portion is formed in a planar shape, similar to the configuration shown in FIG. 15 of the second embodiment.

In the figure, the same parts as those in each of the above embodiments are designated by the same reference numerals, and the description thereof will be omitted. As shown in FIG. 17, the uneven heights H3, H4, and H5 of the second uneven portion 4 of the second core member 22 are formed lower than the uneven height H1 of the first uneven portion 3. Further, it is formed in the relationship of the unevenness height H3 <the unevenness height H4 <the unevenness height H5. That is, in the second uneven portion 4 formed in the radial direction X, the uneven height H5 of the inner side X2 in the radial direction X is formed higher than the uneven height H4 of the outer side X1 in the radial direction X. Further, the uneven height H4 of the inner side X2 in the radial direction X is formed higher than the uneven height H3 of the outer side X1 in the radial direction X.

The second core member 22 thus formed, and the first core member 21 and the third core member 23 shown in each of the above embodiments are laminated in the axial direction Y as shown in FIG. 11 is formed. The amount of core shrinkage in the axial direction Y of the core member 2 when the lead wire 80 is wound increases from the outer side X1 to the inner side X2 in the radial direction X. Since the inner X2 in the radial direction X is formed higher than the outer X1 in the uneven height of the second uneven portion 4 of the second core member 22 for preventing the core shrinkage, the core shrinks during winding. It becomes easy to control the amount of inclination due to the difference in product thickness in the axial direction Y between the inner side X2 and the outer side X1 of the tooth portion 12 in the radial direction X, and it becomes possible to correspond to the amount of core shrinkage different in the radial direction X. Therefore, as shown in FIG. 18, the interlayer gap 63 can be further maintained as compared with each of the above-described embodiments, and the gap 91 formed between the winding frame 7 and the lead wire 80 can be reduced. it can.

In FIG. 17, an example of adjusting the height of the unevenness of the second uneven portion formed in the radial direction X is shown, but the present invention is not limited to this, and is formed in the radial direction X as shown in FIG. An example of adjusting the height of unevenness in one of the second uneven portions 41 will be described. In FIG. 19, the uneven heights H6, H7, and H8 in the second uneven portion 41 of the second core member 22 are formed lower than the uneven height H1 of the first uneven portion 3. Further, the unevenness height H6 <the unevenness height H7 <the unevenness height H8 are formed.

That is, similarly to the case shown above, the uneven height H8 of the inner side X2 in the radial direction X is formed higher than the uneven height H7 of the outer side X1 in the radial direction X in one second uneven portion 41. .. Further, the uneven height H7 on the inner side X2 in the radial direction X is formed higher than the uneven height H6 on the outer side X1 in the radial direction X. As a result, the same effect as in the case shown above can be obtained. Here, an example in which one second uneven portion 41 is formed in a stepped shape is shown, but the present invention is not limited to this, and when the second uneven portion 41 is formed in an inclined shape, it can be formed in the same manner and the same effect can be obtained.

According to the method for manufacturing the stator core of the rotary electric machine and the stator core of the rotary electric machine according to the third embodiment configured as described above, the same effect as that of each of the above-described embodiments is obtained, and the core shrinkage is the largest. The uneven height of the second uneven portion is formed so that the uneven height on the inner side of the teeth portion is higher than the uneven height on the outer side in the radial direction of the teeth portion toward the inner side in the radial direction of the teeth portion. This makes it easy to control the amount of inclination due to the axial difference in thickness between the inner and outer sides of the teeth from the core shrinkage during winding, and the lead wire does not slip into the winding frame and gap due to core shrinkage. Further adjustment is possible.

In each of the above embodiments, an example is shown in which the first uneven portion and the second uneven portion are formed on the lower side in the axial direction Y, but the present invention is not limited to this, and the first uneven portion is not limited to this. Even when the portion and the second uneven portion are formed on the upper side in the axial direction Y, the vertical direction in the axial direction Y is only changed, and the same configuration as in each of the above embodiments is performed. It is possible to obtain the same effect as that of each of the above-described embodiments.

Further, in each of the above embodiments, an example in which the stator core is composed of a split core is shown, but the present invention is not limited to this, and the back yoke portions adjacent to each other in the circumferential direction are connected to each other, and the stator core is band-shaped or teethed. If the portion is configured so that the lead wire can be wound around the portion, the same effect as that of each of the above-described embodiments can be obtained by configuring the other portions in the same manner as in each of the above-described embodiments.

In the present invention, each embodiment can be freely combined, and each embodiment can be appropriately modified or omitted within the scope of the invention.

1 stator, 2 core member, 3 first uneven part, 4 second uneven part, 5 opening,
6 interlayer gap, 7 winding frame, 8 coil, 9 gap, 10 stator core,
11 split core, 12 teeth part, 13 back yoke part, 14 shoe part,
20 Tension, 21 1st core member, 22 2nd core member, 23 3rd core member,
31 concave part, 32 convex part, 41 second uneven part, 42 second uneven part, 61 interlayer gap,
62 Interlayer gap, 63 Interlayer gap, 70 Insert claw, 71 First roll frame, 72 Second roll frame,
73 Third winding frame, 80 lead wire, 90 gap, 91 gap, H1 uneven height,
H2 unevenness height, H3 unevenness height, H4 unevenness height, H5 unevenness height, H6 unevenness height, H7 unevenness height, H8 unevenness height, X radial direction, X1 outside, X2 inside, Y-axis direction, Z Circumferential direction.

Claims (8)

A stator core having a plurality of teeth portions formed so as to project in the radial direction at intervals in the circumferential direction and having a back yoke portion for magnetically connecting each of the tooth portions in the circumferential direction.
An insulating winding frame arranged in the teeth portion and
In the stator core of a rotary electric machine provided with a coil wound around the teeth portion via the winding frame.
A core member made of an electromagnetic steel plate is formed by laminating a plurality of core members in the axial direction.
All the core members have a first uneven portion that connects the core members that are axially adjacent to the back yoke portion.
At least one of the core members has a second uneven portion having a convex uneven height lower than the convex uneven height of the first concave- convex portion at a location where the coil is arranged in the tooth portion.
Said core member in the axial direction of the convex portion of the second concave-convex portion of the core member having the second uneven portion is formed, the convex portion of the second concave-convex portion in the axial direction of the tooth portion A stator core of a rotary electric machine having a base surface of the teeth portion in which the second uneven portion is not formed at a portion to be formed. The core member has a first core member and a second core member.
The first core member does not form the second uneven portion on the tooth portion,
The second core member has the second uneven portion of the tooth portion.
Wherein the axial direction in which the convex portion is formed in the second core member, a stator core of a rotating electrical machine according to claim 1, wherein said first core member is laminated. The stator core of the rotary electric machine according to claim 1 or 2, wherein a plurality of the second uneven portions are formed at different positions in the circumferential direction. The stator core of a rotary electric machine according to any one of claims 1 to 3, wherein a plurality of the second uneven portions are formed at different positions in the radial direction. The stator core of the rotary electric machine according to any one of claims 1 to 4, wherein the second uneven portion is formed in a round shape or an oblong shape. The second uneven portion is formed from claim 1 to claim 1, wherein the uneven height of the convex portion on the inner side in the radial direction of the tooth portion is higher than the uneven height of the convex portion on the outer side in the radial direction of the tooth portion. 5. The stator core of a rotary electric machine according to any one of 5. The stator core of the rotary electric machine according to any one of claims 1 to 6 is
A stator core of a rotary electric machine formed by a split core that is divided in the circumferential direction for each tooth portion. The method for manufacturing a stator core of a rotary electric machine according to any one of claims 1 to 7.
A method for manufacturing a stator core of a rotary electric machine, in which the number of core members in which the second uneven portion is formed is adjusted so as to have a desired interlayer gap, and the core members are laminated.

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