JP2002051489A - Dynamo-electric machine and manufacturing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To optimize an on-vehicle motor having severe demands on outputs and dimensions by making the coil end of a stator short and compact. SOLUTION: In a coil 31, wound into a prescribed shape, opposing short sides 3s are inserted into jigs 11, 12 with opposing long sides 31 being pressed, and by changing the torsional center X of the jigs, coil ends 3u1 of respective phases can be obtained which are formed out of the short-sides 3s, having a difference in a standing-up position against the long sides 31 forming a slot section 3u2. The coils of respective phases are fitted to a stator core from the internal diameter direction, so that the coil ends 3u1 may be in line with both ends of the core and the slot section are inserted into a slot. The coil ends of respective phases are disposed at positions which are different in the radial direction and roughly the same in the axial direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating electric machine (including a motor and a generator) formed by winding a plurality of phases of coils around a core such as a stator, and a method of manufacturing the same, and more particularly, to a power source of an automobile. More particularly, the present invention relates to a rotating electric machine that winds a coil by distributed winding, for example, a shape of a coil end portion protruding from both end surfaces of a core and a method of forming the same.

[0002]

2. Description of the Related Art In general, rotary electric machines such as induction motors and DC motors (including generators) are widely used as power sources for industrial or vehicular use. As an important thing, concentrated winding having a small coil end without interfering with each phase coil may be adopted, but generally, distributed winding having a high specific output is used. The distributed winding is a winding method in which a coil is wound by crawling a plurality of slots, and since coils of each phase overlap, a coil end becomes large.
Among the axial dimensions of the stator, what contributes to the motor output is the stator core laminated thickness portion, and the magnet wire portions at both ends are connected only to circulate the current and contribute to the output. Not.

[0003] A motor mounted on a vehicle such as an electric vehicle is required to have a strict output / dimension because of its required output and mounting on the vehicle. Is desired.

Conventionally, a stator in which a coil wound in advance is inserted into each slit from the inner diameter side of a stator core and mutual interference is prevented by twisting the coil end or the like is disclosed in Japanese Patent Application Laid-Open No. 9-215238 (the former). Kaihei 10-27
No. 1733 (the latter).

[0005] In the former, the magnet wire rising from the inner diameter side with respect to the core in the slot portion is three-dimensionally folded so that it passes nearer to the end face of the core than the magnet wire rising from the outer diameter side. A U-phase coil formed flat at the end in the axial direction;
A V-phase coil, which is folded in parallel above the three-dimensionally folded portion of the phase coil and extends parallel to the inner diameter side of the U-phase coil at the coil end, and is formed two-dimensionally from the slot portion, And a W-phase coil formed flat in the radial direction.

In the latter, the magnet wire rising from the outer diameter side of the slot is three-dimensionally folded so as to pass nearer to the core end face than the magnet wire rising from the inner diameter side, and is turned toward the outer diameter side at the coil end. And a U-phase coil formed flat in the axial direction
V-shaped folded back in a dimension and flattened radially outside the U-phase coil at the coil end.
The phase coil and the magnet wire rising from the inner diameter side of the slot are three-dimensionally folded so as to pass closer to the end face of the core than the wire rising from the outer diameter side, and the inner diameter of the U-phase coil at the coil end And a W-phase coil disposed axially inside the V-phase coil.

[0007]

However, in the former structure, the U-phase coil and the V-phase coil are arranged at the coil end so as to be largely detoured to the outer diameter side from the slot portion, and the coil length is correspondingly increased. Is getting longer. Further, in the latter structure, the W-phase coil is disposed at the coil end so as to largely bypass the position axially away from the core end face, and the coil length is increased accordingly.

Therefore, according to the above-mentioned conventional technology,
As the coil length increases, it becomes a part of copper loss that lowers the efficiency of the motor, and also hinders downsizing of the coil end. In particular, when the coil is applied as the above-described motor for mounting on a vehicle, the output / dimension is required. Not enough for

Accordingly, an object of the present invention is to provide a rotating electric machine such as a motor and the like and a method of manufacturing the same, which solve the above-mentioned problems by shortening and miniaturizing the coil end of the stator.

[0010]

The present invention according to claim 1 (see, for example, FIGS. 1 to 10) includes a plurality of slots (5...).
And a core (2) in which teeth (6 ...) are alternately formed,
A coil (3...) Of at least three phases (U, V, W) in which the conductor (3a) is wound around the slot (5) by distributed winding
Wherein each of the coils (3u, 3v, 3) is inserted into a slot (5, ...) of the core in a state where the coils (3, ...) are formed into a predetermined shape.
w) is a slot portion (3u ₂ , 3v ₂ , 3w ₂ ) attached to the slot (5u, 5v, 5w), and a coil end portion (3u ₁ , 3u ₁ , 3w ₂ ) extending circumferentially at both ends (2a) of the core. 3v ₁ , 3w ₁ ) and rising portions (3u ₃ , 3v ₃ , 3v ₃ , 3v ₃₎ connecting the slot portion and the coil end portion.
3w ₃ ), and the coil end portion (3u ₃ ) of each phase.
₁ , 3v ₁ , 3w ₁ ) are arranged at different positions in the radial direction and substantially at the same position in the axial direction so as not to interfere with each other.

The present invention according to claim 2 (see, for example, FIGS. 2, 5, and 8) provides the coil end portions (3u ₁ ,
3v ₁ , 3w ₁ ) is the rotating electric machine according to claim 1, wherein the rotating electric machine has a flat shape whose axial direction is longer than its radial direction.

The present invention according to claim 3 (for example, see FIG. 2, FIG. 5, and FIG. 8) provides that all the coil end portions (3
3. The rotating electric machine according to claim 1, wherein u ₁ , 3v ₁ , 3w ₁ ) are arranged within a radial range (depth D) of the slot.

According to a fourth aspect of the present invention (see FIGS. 3, 6, and 9), the rising portions (3u ₃ , 3v ₃ , 3w) are provided.
₃ ) is between the slot (3u ₂ , 3v ₂ , 3w ₂ ) and the coil end (3u ₁ , 3v ₁ , 3w ₁ )
The rising portions are three-dimensionally twisted so as to deflect substantially 90 degrees in the radial direction and the axial direction, and the rising portions have teeth (6) adjacent to the slots (5...) In which the slot portions are mounted.
u, 6v, 6w) within a width (j).
Or the rotary electric machine according to 3.

The present invention according to claim 5 (for example, FIG.
5, 8, and 15), the coil end portion (3u
₁ , 3v ₁ , 3w ₁ ) has an axially inner end (k) that does not interfere with the rising portion (f), the length (f) of the slot portion (3).
The rotating electric machine according to any one of claims 1 to 4, wherein the rotating electric machine is arranged axially away from u ₂ , 3v ₂ , 3w ₂ ).

According to a sixth aspect of the present invention, the coil of each of the phases is provided.
Are the first, second and third coils (3u, 3v, 3
w), and the first coil (3u) (for example,
2), its coil end portion (3u ₁) Outer diameter side end face
(A) is the slot portion (3u_Two)
The third coil (3w) is arranged so as to be aligned.
(For example, see FIG. 8), the coil end portion (3w ₁)of
The end face (b) on the inner diameter side has its slot portion (3w)._Two) Inside diameter side
A second coil disposed substantially aligned with the portion;
(3v) (for example, see FIG. 5), its coil end portion
(3v ₁) Are the coil ends of the first and second coils
Part (3u₁, 3w₁) Between the claims
Item 6. The rotating electric machine according to any one of Items 1 to 5.

According to a seventh aspect of the present invention, the coils of each phase are first, second, and third coils (3u, 3v, 3
w), the first coil (3u) (see, for example, FIG. 3) is such that the conductor (3a) on the back side of the slot portion (3u ₂ ) is located axially outside the coil end portion (3u ₁ ). The second coil (3v) is located at the entrance side of the slot portion in the axial direction of the coil end portion (see FIG. 6, for example).
v ₂ ) The conductor (3a) on the back side is located axially outside (see the axial section 1) or inside (see the axial section 2) of the coil end portion (3u ₁ ), and the conductor (3a) on the inlet side of the slot portion. The conductor is located axially inside (see axial section 1) or outside (see axial section 2) the coil end portion, and the third coil (3w) (see, for example, FIG. 9) has its slot portion (3w ₂ ). ) The conductor (3a) on the far side is located axially inside the coil end portion (3w ₁ ), and the conductor on the entrance side of the slot portion is located axially outside the coil end portion. A rotating electric machine according to any one of claims 1 to 6.

The present invention according to claim 8 (for example, see FIGS. 3, 6, and 9) provides the coils (3u, 3v, 3
w), the coil end portions (3u ₁ , 3v ₁ , 3)
w ₁ ) and the rising portions ( ₃ u ₃ , 3 v ₃ , 3 w ₃ ), the length of the conductor (3 a) is such that the one located outside the coil end portion in the axial direction is the axis of the coil end portion. The rotating electric machine according to claim 7, wherein the rotating electric machine is set to be longer than a member located inward in the direction.

According to a ninth aspect of the present invention, the rotating electric machine is an AC motor and / or a generator, and the core is a core (2) of a stator (1). It is in the rotating electric machine described.

The present invention according to claim 10 (for example, FIG.
And FIG. 18), a winding step of winding the conductor into a predetermined shape (see, for example, FIGS. 11 and 12), and the opposing first 2 of the coil (3 ₁ ) wound in the winding step. Edge (3
l) is pressed by the first jig (15a, 15b), and the other two opposing second sides (3s) are held in the second jig (1).
1 and 12) and a twisting process of twisting in a state sandwiched by
3, see FIG. 14), insert the first two sides (3l) into the slots (5) of the core (2) with the second two sides (3s) along the both end faces of the core. And a mounting step of mounting the coil on the core from the radial direction (for example, see FIG. 17). In the twisting step, the slot is inserted into the slot (5) to form the slot portion (3u ₂ ). With respect to the first side (3l), the second side (3l)
s), the second two sides are arranged at different positions in the radial direction with respect to the core (2) by changing the twist centers (X) of the coil end portions (3u ₁ , 3v ₁ , 3w _1). ), Wherein a plurality of phase coils (3u, 3v, 3w) are formed.

The present invention according to claim 11 (for example, FIG.
The method of manufacturing a rotating electrical machine according to claim 10, wherein in the winding step, the circumferential lengths of the coils to be aligned and wound are different from each other. 11.

The present invention according to claim 12 (for example, FIG.
2, see FIGS. 19 and 20), winding in the winding step
Coil (3₁, 3_Two, 3_Three) Is almost rectangular
And at least two opposing sides (3s)
A predetermined angle (β, γ, δ) with respect to the center axis,
, The two opposing sides are the coil end portions (3
u₁, 3v₁, 3w₁)) On the second side (3s)
Correspondingly, the large diameter portion of the two sides (3 ₁a, 3_Twoa, 3
_Threea) is on the outer diameter side of the coil end portion, and
2 side small diameter part (3₁b, 3_Twob, 3_Threeb) said carp
To be on the inner diameter side of the
Item 11. A method for manufacturing a rotating electric machine according to item 11.

The present invention according to claim 13 (for example, FIG.
3, FIG. 14, FIG. 15, FIG. 16), the first side (3
l) is molded to fit said slot (5)
And a second forming step of forming the second side (3s) into a flat shape in which the height direction of the coil is longer than the width direction in the twisted state. , Claim 1
13. A method for manufacturing a rotating electric machine according to any one of items 0 to 12.

The present invention according to claim 14 (for example, FIG.
4, FIG. 15, FIG. 16), the first jig (15a,
The method according to claim 13, wherein the first forming step is performed by 15b) and the second forming step is performed by the second jig (11, 12).

The present invention according to claim 15 (for example, FIG.
4, FIG. 15, FIG. 16, and FIG. 18), in the twisting step, the first side (31) pressed by the first jig (15a, 15b) and the second jig (11). ,
At the round portion (3r) between the second side (3s) and the second side (3s), the coil is twisted and deformed by approximately 90 degrees to form a rising portion (3u ₃ ...). 3u ₃ …)
15. The method for manufacturing a rotating electric machine according to claim 10, wherein the diameter is set within the width (j) of the teeth (6) of the core (2).

The present invention according to claim 16 (for example, FIG.
4, see FIG. 15, FIG. 16), the second jig (11, 1) sandwiching the second side used in the twisting step.
One of (2) has a groove (11a) for accommodating the second side (3s), and the bottom (11b) constituting the bottom surface of the groove has a predetermined thickness (f). The coil inner end surface (k) of the second side (3s) that becomes the coil end portion (3u ₁ ...) Is the slot portion (3u ₂ ...).
The manufacturing method of a rotating electric machine according to claim 15, wherein the rotating electric machine is formed so as to be separated by a predetermined amount (f) outward from a starting end portion (n) that moves to the rising portion ₃ u ₃ from the starting portion.

The present invention according to claim 17 (for example, FIG.
4, FIG. 15, FIG. 16), one (11) of the second jigs (11, 12) sandwiching the second side (3s) used in the twisting step is formed by the round portion (3).
r), and the other (12) of the second jig has a contact portion (12c) for regulating the radius, and the contact portion (12c) is provided with the second jig. One of the tools (11)
The predetermined thickness (f) of the groove bottom (11b) at
16. A relief (12a) substantially corresponding to
In the method for manufacturing a rotating electric machine described above.

[Operation] Coil 3 wound into a predetermined shape
₁ is a state where the opposing first side (3l) is pressed,
The other opposing second side (3s) is sandwiched between jigs (11, 12), and the torsion center X of the jig is changed to form a slot portion (3u ₂ , 3v ₂ , 3w ₂ ). Second side (3s) having a different rising position with respect to one side (3l)
End parts (3u ₁ , 3v ₁ , 3w)
₁ ) is obtained. At this time, the slot portion (3u ₂ , 3u
v ₂ , 3w ₂ ) correspond to the slot (5) of the core, and the coil end portions (3u ₁ , 3v ₁ , 3w ₁ )
Is preferably formed in a flat shape in which the height direction is longer than the width direction.

The coils (3u, 3v, 3w) of each phase are provided on a core (2) such as a stator (1), and the coil end portions (3u ₁ , 3v ₁ , 3w ₁ ) are provided along both ends (2a) of the core. So that the slot portion is inserted into the slot (5).

The rotating electric machine component manufactured in this manner,
For example, in the stator, the coils (3v, 3w) of each phase are inserted into the slots (5...), And the coil end portions (3u ₁ , 3u) of each phase are not interfered with each other at both ends of the core.
v ₁ , 3w ₁ ) are arranged at different positions in the radial direction and substantially at the same position in the axial direction.

The reference numerals in the parentheses are for the purpose of comparison with the drawings, but are for the purpose of facilitating and facilitating the understanding of the present invention. It has no effect on the configuration described in the claims.

[0031]

According to the first aspect of the present invention, since each coil is inserted into the slot in a state of being formed into a predetermined shape, the slot portion of the coil can be configured to substantially match the width of the slot and the coil can be formed. The end part can be made compact, and the coil end parts of each phase are arranged at different positions in the radial direction and substantially at the same position in the axial direction so as not to interfere with each other. By shortening the length, copper loss is reduced, efficiency is improved, and the coil end can be made compact.
Improve performance.

According to the second aspect of the present invention, since the coil end portion has a flat shape, the coil ends having a predetermined layer thickness can be aligned in a relatively narrow space without interference.

According to the third aspect of the present invention, since the coil end portions of all phases are arranged within the radial direction (depth) range of the slot, the coil end portions can be made compact.

According to the present invention, the rising portion formed by being twisted three-dimensionally is arranged within the width of the teeth adjacent to the slot in which the slot portion is mounted. Interference between the portions and the coil end portion is prevented.

According to the fifth aspect of the present invention, since the coil end portion is disposed at a predetermined distance from the slot portion,
Twisting at the rising portion can be easily and reliably performed, and the coil end portion can be prevented from interfering with the rising portion while maintaining the axial size of the coil end portion compact.

According to the sixth aspect of the present invention, the coil ends of the three-phase coils are arranged within the range of the slot and without interfering with each other, so that the remaining length of the coil end can be reduced. It can be made compact.

According to the seventh aspect of the present invention, the rising portions of the coils of each phase are configured to be compact in a fan shape in accordance with the position of the coil end portion. The length of the conductor can be shortened, and the conductor can be made compact.

According to the eighth aspect of the present invention, the length of the conductor located outside the coil end portion in the axial direction plus the coil end portion and the rising portion is longer than that of the conductor located inside the axial direction. The coil end part can be formed without difficulty, and the extra length of the coil end part can be made short and compact.

According to the ninth aspect of the present invention, when the present invention is applied to a stator of an AC motor / generator, sufficient output /
With dimensional characteristics, it is possible to cope with a motor mounted on a vehicle or the like and to exhibit high performance.

According to the tenth aspect of the present invention, the coil can be mounted on the core in the radial direction, the length of the coil end can be shortened to improve the efficiency, and the structure can be made compact. By making the torsion center of the second jig sandwiching the coil end different, the coil end part can be aligned at different positions in the radial direction of the core end face, and a compact and highly efficient rotating electric machine can be easily manufactured with simple equipment. Can be manufactured.

According to the eleventh aspect of the present invention, the coils aligned and wound in the winding step are adjusted in accordance with the fact that the slots are oriented toward the center in the radial direction, and according to the shape and position of the coil end. The winding frame etc. are set so that each circumference is the optimum length, making it easy and reliable to manufacture coils with high efficiency without waste of extra length and easy installation of coils in slots. can do.

According to the twelfth aspect of the present invention, the larger diameter portion of the second side corresponds to the outer diameter side of the coil end portion, and the smaller diameter portion of the second side corresponds to the inner diameter side of the coil end portion. As described above, the coil end portion can be formed into a proper and reasonable shape by twisting in the twisting step.

According to the thirteenth aspect of the present invention, in the first forming step, the slot portion is formed so as to match the slot, the conductor density in the slot can be increased, and the efficiency can be improved. Insertion into the slot is facilitated, assemblability can be improved, and in the second molding step, the coil end portions are flattened, and the coil end portions of each phase can be arranged in the radial direction to be compact, In addition, the extra length of the coil end portion can be shortened to improve the efficiency.

According to the fourteenth aspect of the present invention, the first and second forming steps can be simultaneously performed using the first and second jigs in the twisting step, and the manufacturing process can be shortened. As a result, the manufacturing efficiency can be improved.

According to the fifteenth aspect of the present invention, the second side is moved with respect to the first side while the radius between the first side and the second side is not pressed by the jig. By twisting approximately 90 degrees, the rising portion can be easily and accurately formed, and the rising portion can be accommodated within the width of the teeth of the core.

According to the sixteenth aspect of the present invention, the second side constituting the coil end portion is inserted into the concave groove of the second jig and twisted, so that the second end is shifted from the slot portion to the rising portion. Since the molding is performed at a predetermined distance, it is possible to form the torsionally deformed rising portion reliably and easily, and to accurately and easily form the compact coil end portion while preventing interference with the rising portion. Can be manufactured.

According to the seventeenth aspect of the present invention, when the rising portion is formed by the round portion of the coil, the round portion is regulated by the other contact portion of the second jig, and the rising portion is formed by the escape portion. It is possible to form the shape in which the rising portion is held down by holding the deformation of the portion in a predetermined shape while allowing the deformation, and the interference with the coil end portion formed by a predetermined distance based on the bottom of the concave groove is prevented. The rising portion can be easily and reliably formed in the prevented shape.

[0048]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing an embodiment in which a rotating electric machine according to the present invention is applied to a stator of an AC motor / generator. FIGS. 2 to 4 show U-phase coils, FIGS. 5 to 7 show V-phase coils, 8 to 1
0 is a diagram showing a W-phase coil.

The AC motor (rotating electric machine) includes the stator shown in FIG. 1 and a rotor (not shown), and is suitably applied to a brushless DC motor that is a driving source of an electric vehicle and a hybrid vehicle. The stator 1 includes a core 2 formed by laminating a number of thin silicon steel plates, and a coil 3 wound with a magnet wire (conductor) 3a. The core 2 is formed in a ring shape, and a large number of slots 5 and teeth 6 that are opened on the inner diameter side are alternately formed at predetermined intervals. Then, three-phase U, V, W coils are wound by distributed windings occupying two slots 5 separated by a predetermined pitch.

As shown in FIGS. 2 and 3, the U-phase coil 3u has two slots 5 with five teeth 6 interposed therebetween.
The magnet wire 3a is formed by being wound between u and 5u, and is flattened in the axial direction at the outer diameter side at both ends in the axial direction of the core 2, that is, at the back side of the slot 5 (axial direction as compared with the radial direction). long flat shape, the coil end portions 3u ₁ to become hereinafter) is molded. The coil end 3u
₁ is arranged such that its outer diameter side uneven plane a is substantially aligned with the bottom surface 5a of the slot, and more specifically, as shown in detail in FIG.
Rises substantially as it is along the slot bottom surface 5a, and extends circumferentially in parallel with the core end surface at a position axially away from the core end surface 2a. The wire 3a is bent greatly in the direction of the bottom surface of the slot, rises up, and extends in the circumferential direction parallel to the core end surface at a position close to the axial direction from the core end surface 2a. It is wound so as to be bent in the middle in the bottom direction and rise up, and to extend in the circumferential direction parallel to the core end face at a portion between the core end face and the axial direction.

The U-phase coil 3u is
a slot portion 3u ₂ in u, constituting the coil end portion has a rising portion 3u ₃ between the flat portion 3u ₁ extending parallel to the core end face, upstanding upstream portion詳示4 as to, in the radial and axial direction together it is twisted 3-dimensionally so as to deflect approximately 90 degrees, as shown in FIG. 3, the slot portions 3u ₂ of the U-phase coil is fitted slots The teeth 6u, 6u adjacent to 5u, 5u are arranged in a width j portion.

In the upper part of FIG. 2, the U-phase coil
Coil end flat part 3u₁But other phase V and W coils
End flat part 3v₁, 3w₁Drawn longer in the axial direction
But this is due to the crossover
Is similar to the other phase coil end flat part as shown in the lower part
They have the same length. This is shown in FIGS.
It is the same even if it is. Also, as described later in the manufacturing method
The coil end (3u ₁) And rising (3u)_Three) And
The length of the added wire 3a is equal to the coil end 3u.₁In
And the one located on the outside in the axial direction is located on the inside in the axial direction
It is set longer than the one. In addition, this point
The same applies to seeds V and W.

As shown in FIGS. 5 and 6, the V-phase coil 3v has two slots 5 with five teeth 6 interposed therebetween.
A coil wire 3a is formed by winding a magnet wire 3a between v and 5v. The coil end is flattened in the axial direction at a middle portion (radial intermediate position) of the slot at both ends in the axial direction of the core 2. part 3 v ₁ is molded. The coil end portion 3 v ₁ is disposed in an intermediate portion of the slot 3 v ₂ which is fitted into the slot 5 in detail, as shown in the axis-perpendicular surface and the shaft section 1 in FIG. 6, the slot inner side ( The wire 3a on the outer diameter side is bent in the inner diameter direction and rises, and extends in the circumferential direction parallel to the core end face at a position away from the core end face 2a in the axial direction, and in the middle of the slot (radial middle portion) Of the slot extends substantially in the circumferential direction parallel to the core end face at a position axially distant from the core end face 2a in the axial direction, and the wire on the slot front side (entrance side; inner diameter side) has an outer diameter of The core is wound so as to be bent in the direction and rise in the axial direction at a position close to the core end face in the axial direction from the core end face.

[0054] Incidentally, the one shown in axial section 1 of Figure 6 described above, although the slot inner side of the wire is twisted so as to be positioned away from the axial direction at the coil end section V _1, axial section 2 as shown in, it becomes the position where the slot front wire away from the axial direction at the coil end V _1, and the slot inner side of the wire, so that a position close to the axial direction at the coil end section, be twisted , Similar (see whole coil)
Flat coil end 3 located at a radially intermediate position
v ₁ can be molded. In this case, at a position where the wire on the back side of the slot is close to the core end face 2a in the axial direction, and at a position where the wire on the front side of the slot is axially away from the core end face 2a,
Each extends in the circumferential direction parallel to the core end face.

The V-phase coil 3v is connected to the slot 5
v and slot 3 v ₂ in the has a rising portion 3 v ₃ between the coil end flat portion 3 v ₁ extending parallel to the core end face, upstanding upstream portion, as shown in detail in Figure 7, the radius together are twisted 3-dimensionally so as to deflect approximately 90 degrees and axially, as shown in FIG. 6, the slots 5 v, 5 v to slot 3 v ₂ of the V-phase coil is fitted
Are arranged in the width j portion of the teeth 6v, 6v adjacent to.

As shown in FIGS. 8 and 9, the W-phase coil 3w has two slots 5 with five teeth 6 interposed therebetween.
w, is formed by the magnet wire 3a is wound between 5w, the inner diameter side in the axial end of the core 2, i.e. at the front side of the slot 5, the coil end portion 3w ₁ so that flat axially Is formed. The coil end 3
w ₁ is the slot portion 3 v ₂ which is fitted into the slot 5
The inner diameter side deviated plane b is arranged so as to be substantially aligned with the front side (entrance side) wire. Specifically, as shown in detail in FIG. ,
Bends greatly in the inner diameter direction and rises, and core end face 2
a, the wire extends in the circumferential direction parallel to the core end face at a position close to the axial direction, and a wire in the middle of the slot (radial intermediate portion) is bent slightly up in the inner diameter direction and rises, and extends in the axial direction from the core end face 2a. The wire extends in the circumferential direction parallel to the end face at an intermediate position, and the wire on the front side of the slot (entrance side; inner diameter side) rises substantially as it is, and the core end face is located at a position axially away from the core end face 2a. It is wound so that it may extend in the circumferential direction in parallel with.

The W-phase coil 3w is
a slot portion 3w ₂ in w, has a rising portion 3w ₃ between the coil end flat portion 3w ₁ extending parallel to the core end face, upstanding upstream portion, as shown in detail in FIG. 10, the radius together are twisted 3-dimensionally so as to deflect approximately 90 degrees and axially, as shown in FIG. 9, the slot 5w, 5 slot portion 3w ₂ of the W phase coil is fitted
The teeth 6w, 6w adjacent to w are arranged at a width j portion.

The coils 3u, 3v, 3w of each phase are adjacent to each other.
The same phase coil is inserted into the slot
Physically, two U-phase slots 5u, 5u → two W-phase slots
Lot 5w, 5w → 2 V-phase slots 5v, 5v in order
Are arranged so as to be repeated over the entire circumference. And
As shown in FIG. 2, FIG. 5, and FIG.
And the flat portion 3u of each phase₁, 3v₁, 3w₁But interfere with each other
At different locations in the radial direction and axially
And extend in the circumferential direction in parallel at substantially the same position,
From the outer diameter side (slot back side) to the inner diameter direction (slot
U-phase coil end flat part 3u₁ , V phase
Coil end flat part 3v_1,W-phase coil end flat part 3
w₁Are arranged in order, and each rising portion 3u_Three, 3
v_Three, 3w _ThreeIs the slot 3u of each phase_Two, 3v_Two, 3
w_TwoThe width of the teeth 6 ... inside the slots 5 ...
Housed in a circumferential direction at the different radial positions described above
Each extending flat part 3u₁, 3v₁, 3w₁Interfere with
There is no. Also, as shown in FIGS. 2, 5, 8, and 15,
The coil end 3u₁, 3v₁, 3w₁Axis direction
The length f of the inwardly facing end k does not interfere with the rising portion,
Slot 3u_Two, 3v_Two, 3w_TwoAxially away from
It is arranged.

Next, a method of manufacturing the above-described stator, especially the coil, will be described with reference to FIGS.
First, as shown in FIG. 11, wound magnet wire (conductor) 3a on the winding frame 10 shaped assembly, forming a set of successive coil windings 3 ₁ 3 vol. The winding frame 10 has a truncated pyramid shape in different directions, specifically, a side view [(b),
(D)] Three outer dies 10a each having a substantially rectangular shape and a front view and a plan view [see (a) and (c)] and a trapezoid.
The winding frame 10 can disassemble each outer mold 10a by removing the core shaft 10b. The coil 3 ₁ while wound on the winding frame 10 as described above, each outer mold 10a
... by decomposing, coil windings 3 ₁ triple is removed from the outer die. In addition, the three coil windings are removed, and all the coil windings are trapezoidal (truncated pyramids) in the same direction in a state where the coil windings are placed on a plane.

[0060] one coil windings 3 ₁ of the coil winding of triplicate removed from the bobbin, specifically shown in Figure 12 the winding for the U-phase coil (3u). The coil winding 3
₁ is, as shown in FIG.
And a trapezoidal shape when viewed from the front [see (b)] and side view [see (c)], and has a long side 3l. The width c of the winding portion 3d is equal to the width e of the slot 5 of the stator core 2.
(See FIGS. 1, 3, 6, and 9), and is formed to be substantially equal to the width e so that the slot 5 of the core faces the center O. It is formed so as to be substantially equal to the angle.

As shown in FIG. 12 (c), the opposite short side 3s has a predetermined angle β with respect to the coil center axis.
In the twisting process using a jig described below,
Its large diameter portion 3 ₁ a is (apart from the core end face in the axial direction with respect to the core side) is expanded outside the outer diameter side of the coil end portions 3u _1, and the shortening the small diameter portion 3 ₁ b is inwardly The coil is twisted so as to be on the inner diameter side of the coil end portion (the side closer to the core end face in the axial direction with respect to the core). Similarly, FIG.
Indicates the shape of the V-phase coil before molding, and FIG.
As shown in the figure, the width c and the angle α of the long side 3l are
And the short side 3s has a predetermined angle γ with respect to the center axis of the coil, as shown in FIG. portion 3 ₂ a is the coil end portion and (3 v ₁₎ and the outer diameter side, the small diameter portion 3 ₂ b is twisted so that the inner diameter side of the coil end portion. In the V-phase coil, as shown in the axial section 2 of FIG. 6, the twisting direction may be reversed. In this case, the predetermined angle γ is inclined so as to be in the opposite direction (minus side). FIG. 20 shows the shape of the W-phase coil before molding. As shown in FIG. 20B, the width c and the angle α of the long side 3l are substantially the same as the width and the angle of the slot 5. And the short side 3s is, as shown in FIG.
Since the W-phase has a reverse twisting direction, the W-phase has a predetermined angle δ opposite to the U-phase with respect to the coil center axis. In the twisting step, the large-diameter portion 3 ₃ a has a coil end portion (3w). ₁ )
And the small diameter portion 3 ₂ b is twisted so as to be on the inner diameter side of the coil end portion.

[0062] Then, as shown schematically in FIG. 13, the coil windings 3 ₁ becomes a slot portion in which the long sides 3l is fitted into the slot 5, and flat extending in the circumferential direction thereof shorter side 3s coil end The long side 3l is held down by a jig, and the short side 3s is held by the inner jig 11
In this state, the inner and outer jigs 11 and 12 are twisted at an angle close to 90 degrees, more precisely, an angle obtained by subtracting a trapezoidal angle from 90 degrees, and the short side is orthogonal to the core end face. The portion corresponding to the radius 3r is three-dimensionally deflected so that the flat portion has a flat shape (the height direction of the coil is longer than the width direction, the same applies hereinafter) in the direction (radial direction of the coil). In addition, the short side portion 3s is connected to the holding jigs 11 and 12.
The long side portion 31 serving as a slot is also formed by a similar clamping jig following the coil twisting step or independently before and after the coil twisting step. It is molded so as to fit into.

[0063] To be more specific, the coil 3 was twisting molded as described above, for example, U-phase coil 3u, as shown in FIG. 14, the jig 15a sandwiching the slot portion 3u ₂ constitute long sides 3l, 15b in a state held by the [(c) refer to the left half view, the short side 3s constituting the coil end flat portions 3u ₁
Is twisted by the jigs 11 and 12 [see (a) and (c) in the right half diagram] and twisted by approximately 90 degrees about the twisting center X [see (b)]. At this time, as shown in FIGS. 14A and 16, the outer pinch jig 12 for twisting is
And the length extending over the entire short side 3s. Specifically, as shown in FIG. 15 (a cross-sectional view taken along the line AA in FIG. 14A), the outer pinching jig 12 has a portion corresponding to the short side 3 s on the inner diameter side which is the same as the inner pinching jig 11. Although it is in the length, as shown in FIG. 16 (a cross-sectional view taken along the line BB in FIG. 14A), the contact portion 12 that regulates the round portion corresponding to the round portion 3r.
c, and the corresponding contact portion 12c is
There is a relief portion 12a on the inner diameter side shorter than the portion corresponding to s by a predetermined amount f. Thus, for example, if the outer pinch jig 12 is twisted without touching the round portion 3r, the rising portion becomes a triangular shape that is raised in the axial direction.
Since comprises a contact portion 12c having a relief portion 12a, rounded portions 3r is when it is molded into the rising part 3u ₃ by twisting the jig 11, 12, pressed by the contact portion 12c, and the relief portion 12a Swelling in the outer diameter direction is restricted, and a predetermined shape, that is, a bottom portion 1 of a concave groove 11a described later is used.
1b is formed in a shape whose height is suppressed so as not to interfere with the inner diameter side of the coil end portion.

As shown in FIGS. 14 (a) and 15, the inner pinching jig 11 is configured to be short so as not to abut on the radius 3r (ie, the radius 3r).
Is released), and a concave groove 11a for accommodating the short side portion 3s is formed. Bottom portion 11b constituting the bottom surface of concave groove 11a
The thickness f, as well as allowing the twisting deformation of the rising portion 3u _3, in a range that does not interfere with the rising portion of the other phases on the same teeth 6 to be described later, is shortened axial length of the flat portion So that it is set as thin as possible.

Incidentally, the jigs 11, 1 for sandwiching the short side 3s are described.
2 is provided with sufficient pinching width so as not to interfere with wires rising from adjacent slots. Accordingly, each phase coil can be provided with a twisted shape developed in a fan shape in the space immediately above the teeth adjacent to the slot into which the coil is fitted.

Then, it is held down by the jigs 15a and 15b.
3u_TwoAngle α of both long sides 3l constituting
Is directed toward the center of the slots 5u, 5u separated by the predetermined gap.
Angle is set to approximately match the angle
The layer thickness c of the winding substantially matches the width e of the slot 5, but slightly
It is formed so as to be smaller. In addition, the flat portion 3u₁To
The short side 3s that constitutes is the depth of the slot 5, preferably
All flat parts of each phase fit within the width Y of the slot
And each layer has a layer thickness g in which each phase does not interfere with each other.
Offset h (slots aligned with bottom 5a of slot 5)
3u_TwoDistance from the edge of the flat to the center of the flat part)
Is set to The coil end 3u ₁Excluding the width g of
3u_ThreeIs the second side to be the coil end
3s inside of the coil inner end face k in the diameter (height) direction.
It is formed so that the coil end part
As close as possible to the core, short axial dimension
Reduction can be achieved.

[0067] In the U-phase coil 3u shown in FIGS. 14 to 16, the offset amount h, the end face of the flat portion 3u ₁ a
There has been set to match the (substantially matching the slot bottom 5a) end surface q of the slot portion 3u _2. The offset amount h is set differently for each phase (V phase, W phase), and this is obtained by changing the twist center (X) when twisting by sandwiching the jigs 11 and 12. Can be Therefore,
The V-phase coil 3v and the W-phase coil 3w are formed similarly to the U-phase coil by changing the twist center.

[0068] The coil windings shown in FIG. 12 3 ₁
Is a shape that is optimal for forming the slot portion and the coil end flat portion described above. The perimeter of the required magnet wire 3a at each part of the coil is determined, and the size according to the change in the perimeter is determined. The wire is aligned and wound around the outer die of the bobbin 10. Specifically, the long sides 3l as a slot portion 3u ₂ is common to the slot rear side In the phase (outer diameter side) is long, short sides 3s and rising portions 3r of the coil end portion 3u ₃ is In the twisted shape, the wire 3a becomes longer as it is further away from the core end in the axial direction, and becomes shorter as it is closer to the core end. Therefore, the lengths of the coil end portion and the rising portion change depending on the direction in which the coil is twisted. In addition,
The winding frame is not limited to the truncated quadrangular pyramid described above, but a cylindrical shape, a conical shape reflecting a wire peripheral length according to the shape in which the coil is housed,
It may be a free-rotating body, or a partially modified shape or polygon.

Based on the difference in the offset amount of the flat portion, the optimum shape of the coil winding differs in each phase. Therefore, winding may be performed using a different winding frame for each phase. The same coil winding may be used only by changing the position, and the U-phase coil 3u and the W-phase coil 3w may be mounted upside down at the time of slot mounting, and may be the same.

The coils 3 of each phase formed by the above-described manufacturing method are, as shown in FIG.
Are inserted into the slots 5 to be fitted in such a manner that the coil slot portions are parallel to each other. At this time, each of the phase coils 3u, 3v, 3w has a predetermined angle α and a predetermined layer thickness c so that the slot portion matches each slot, so that the slot portions 3u ₂ , 3v ₂ , 3w _Two
Despite its compact structure without extra length, it is smoothly inserted into the slot. When the inner and outer split type stator cores are used, coils of each phase are inserted into each slot from the outer diameter side, and the same applies to this case.

[0071] inserting the above order of each coil, first, the U-phase coil 3u predetermined slot 5u having a coil end flat portions 3u ₁ in slot rear side, i.e. adjacent slots 5
, The different U-phase coil 3u ₁ is each other so as to extend in the opposite direction, slot 5u of spaced five teeth in each coil is mounted on 5u. Then, the adjacent V-phase coil 3v having a coil end flat portions 3v ₁ to slot middle is, as in the above-described case, the predetermined spaced slots 5u, between 5u, and the slot portion 3v ₂ of the coils mutually extending in opposite directions Inserted into the slots 5 and 5 to be inserted. Finally, the coil end flat portion 3w is provided in front of the slot.
As described above, the W-phase coil 3w having ₁ is inserted between the predetermined spaced slots 5u and 5u, and the slots of the coils extending in the opposite directions are mounted in the adjacent slots. Further, in a state in which the coils of the respective phases are all fitted in the respective slots, the inner diameter side openings of the respective slots are closed by a wedge, insulating paper or a ring-shaped coil fixing tool, and the coils are prevented from falling off.

In the state where each coil is inserted into the slots 5... As shown in FIGS. 2, 5 and 8, the coil end flat portions 3u ₁ , 3v ₁ and 3w ₁ of each phase are different. Since the flat portions are long and flat in the axial direction at the radial position, even if the flat portions extend in the circumferential direction to a predetermined length, they do not interfere with each other. Although the above description has been made based solely on the U-phase coil 3u, the V-phase coil 3v and the W-phase coil 3w
Also, as shown in FIGS. 19 and 20, the winding shape of the coil (the shape of the coil before forming) is different, but similar jigs 11 and 1 are used.
The molding is performed in the same manner, except that the torsional centers X are different using the members 2, 15a and 15b.

The coil end flat portion of each phase is shown in FIG.
As shown in FIG. 5, at the time of twist forming, based on the thickness f of the bottom portion 11b of the concave groove 11a of the jig 11 for storing the flat portion (3u ₁ ), the rising portion (3u ₂ ) from the coil slot portion (3u ₂ ).
₃ ), is formed at a position substantially apart from the starting end portion n (hereinafter referred to as both end portions of the coil throttle portion) by the thickness f, and the rising portion (3u ₃ ) abuts on the jig 12. The escape portion 12a of the portion 12c is formed by being twisted and deformed in a fan-like shape while keeping it relatively low, and the rising portion is formed by the teeth 6 adjacent to the slot 5 into which the coil slot portion (3u ₂ ) is fitted. Within the width of
The teeth 6 can be accommodated in a relatively small gap in the axial direction of the end face. This prevents the rise from interfering with the coil end flat portion extending in the circumferential direction of each phase. The same is true for the V-phase coil and the W-phase coil with respect to the prevention of the interference.

As shown in FIG. 18, in the state where the slot portions of the coils of each phase are fitted in the respective slots in a predetermined order, each coil slot portion is mounted on an adjacent slot, and each coil extends in the circumferential direction. When extending in different directions, two different rising portions may be arranged on one tooth located between the adjacent slots. FIG.
(A) is emphasized, but U extending rightward in the figure.
A slot portion 3u ₂ of phase coils 3u, extending leftward W
Slot 3w ₂ phases coil 3w is adjacent slots 5u, are fitted respectively to 5w, on the teeth 6 between the two slots, the two coils 3u, rising portions 3 of 3w
u ₃ and 3w ₃ are located. Even in this case, as described above, the rising portions 3u ₃ and 3w ₃ formed in a fan shape with the teeth width do not interfere with each other, and the outer diameter side extending from the leading end portions of both rising portions does not interfere with each other. The V-phase coil flat portion 3v ₁ (abbreviated by two lines) disposed between the U-phase coil flat portion and the W-phase coil flat portion on the inner diameter side has the rising portion 3
As described above, u ₃ and 3w ₃ are formed at relatively low positions on the tooth end face, and the flat portion is formed at a predetermined distance f from the core end face 2a, so that they do not interfere with each other.

As described above, each of the coils 3
u, 3v, and 3w are easily and smoothly fitted into the respective slots, and the lengths of the slot portions 3u ₂ , 3v ₂ , and 3w ₂ are substantially the same as the widths of the slots. Together with this, the total length of the coil winding (magnet wire) 3a can be reduced, and copper loss can be reduced.
In particular, the flat portions 3u ₁ , 3v ₁ , 3w _{1 of} each phase are arranged in parallel in the slot at the core end, and the rising portions 3u ₃ ,
Combined with the fact that 3v ₃ and 3w ₃ can be shortened, the wire length of the coil end portion can be shortened, and the coil end can be made compact without lowering the efficiency.

A stator manufactured by the above-described manufacturing method and a rotor manufactured by the same method as that of the related art or by the above-described manufacturing method are combined to manufacture a rotating electric machine such as a brushless DC motor. . The above embodiment is an AC motor mounted on an automobile, but is not limited to this, and may be an industrial motor, and the motor is not limited to a synchronous or induction motor, and may be applied to a DC motor. The present invention can be applied not only to motors but also to generators, and can also be applied to conversion between AC and DC and conversion of the number of phases of AC frequency.
In addition, the above-described distributed winding coil can be applied as a field winding for generating a magnetic field, or as an electric winding for generating an induced electromotive force by relative rotation with the magnetic field.

[Brief description of the drawings]

FIG. 1 is a front view showing a stator of a rotating electric machine to which the present invention is applied.

FIG. 2 is a view showing a U-phase coil, and is a cross-sectional view taken along the arrow OA in FIG. 1;

FIG. 3 is a diagram showing each winding of a U-phase coil.

FIG. 4 is a perspective view showing a U-phase coil.

FIG. 5 is a view showing a V-phase coil, and is a cross-sectional view taken along the arrow OB in FIG. 1;

FIG. 6 is a diagram showing each winding of a V-phase coil.

FIG. 7 is a perspective view showing a V-phase coil.

FIG. 8 is a view showing a W-phase coil, and is a sectional view taken along the arrow OC in FIG. 1;

FIG. 9 is a diagram showing each winding of a W-phase coil.

FIG. 10 is a perspective view showing a W-phase coil.

11 (a) is a front view, FIG. 11 (b) is a side view thereof, FIG. 11 (c) is a partially exploded plan view, and FIG. 11 (d) is a side view thereof.

12A and 12B are diagrams showing a U-phase coil winding in a wound state (before molding), wherein FIG. 12A is a plan view, FIG. 12B is a front view, and FIG. 12C is a side view.

FIG. 13 is a view schematically showing the formation of a coil winding.

14 (a) is a front view, FIG. 14 (b) is a side view, and FIG. 14 (c) is CODE of FIG. 14 (a).
Sectional view.

FIG. 15 is a sectional view taken along the line AA of FIG.

FIG. 16 is a sectional view taken along line BB of FIG.

FIG. 17 is a diagram showing a state where a coil is inserted.

18A and 18B are diagrams showing adjacent coils, wherein FIG. 18A is a front view and FIG. 18B is a cross-sectional view.

FIG. 19 is a diagram showing a V-phase coil winding before molding, in which (a)
Is a plan view, (b) is a front view, and (c) is a side view.

FIG. 20 is a view showing a W-phase coil winding before molding, and (a) of FIG.
Is a plan view, (b) is a front view, and (c) is a side view.

[Explanation of symbols]

1 stator 2 core 2a end face 3 the coil 3a conductors (magnet) 3u first (U-phase) coils 3v second (V-phase) coils 3w third (W-phase) coils 3u _1, 3v _1, 3w ₁ coil end Portion (flat portion) 3u ₂ , 3v ₂ , 3w ₂ Slot portion 3u ₃ , 3v ₃ , 3w ₃ Rising portion 31 ₁ , 3 ₂ , 3 ₃ Coil (winding) 3l First (long) side 3s Second (Short) side 3r Round portion 5 slot 5u U-phase coil slot 5v V-phase coil slot 5w W-phase coil slot 6 Teeth 6u, 6v, 6w Adjacent teeth 10 Reel 10a Outer die 11 Second (pinch inside ) Jig 11a Groove 11b Bottom 12 Second (nipping outside) jig 15a, 15b First jig

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) QQ19 QQ27 SS04 SS11 TT14

Claims (17)

[Claims] 1. A core having a plurality of slots and teeth alternately formed therein, and at least a three-phase coil in which a conductor is wound around the slot by distributed winding, wherein each of the coils is formed into a predetermined shape. In the rotating electric machine, which is inserted into a slot of the core in a state, each of the coils includes a slot mounted on the slot, a coil end extending circumferentially at both ends of the core, and the slot. A rising portion that connects between the coil end portions, so that the coil end portions of the respective phases do not interfere with each other,
A rotating electric machine, wherein the rotating electric machine is arranged at different positions in a radial direction and substantially at the same position in an axial direction. 2. The rotating electric machine according to claim 1, wherein the coil end portion of each phase has a flat shape whose axial direction is longer than its radial direction. 3. The rotating electric machine according to claim 1, wherein all the coil end portions are arranged within a radial range of the slot. 4. The rising portion is three-dimensionally twisted between the slot portion and the coil end portion so as to be deflected substantially 90 degrees in a radial direction and an axial direction. 4. The rotating electric machine according to claim 2, wherein the slot portion is arranged within a width of a tooth adjacent to a slot in which the slot portion is mounted. 5. 5. An axially inner end of the coil end portion,
The rotating electric machine according to any one of claims 1 to 4, wherein the rotating electric machine is disposed axially away from the slot by a length that does not interfere with the rising portion. 6. The coil of each phase includes first, second, and third coils, and the first coil has an outer diameter end surface of a coil end portion and an outer diameter side portion of a slot portion. The third coil is arranged so that an inner diameter end face of the coil end portion is substantially aligned with an inner diameter portion of the slot portion, and the second coil is The rotating electric machine according to any one of claims 1 to 5, wherein the coil end portion is disposed at a portion between the coil end portions of the first and second coils. 7. The coil of each phase includes first, second, and third coils, and the first coil is such that the conductor on the back side of the slot portion is located outside the coil end portion in the axial direction. And the conductor on the inlet side of the slot portion is located axially inside the coil end portion, and the second coil is such that the conductor on the far side of the slot portion is axially outside the coil end portion or The third coil is such that the conductor on the inlet side of the slot portion is located on the inside or outside in the axial direction of the coil end portion, and the conductor on the far side of the slot portion is located on the inner side of the coil end portion. The rotating electrical machine according to any one of claims 1 to 6, wherein the conductor is located axially inward and the conductor on the inlet side of the slot portion is located axially outward of the coil end portion. 8. The length of the conductor including the coil end portion and the rising portion in the coil of each phase is such that the one positioned axially outside the coil end portion in the axial direction of the coil end portion The rotating electric machine according to claim 7, wherein the rotating electric machine is set to be longer than a member located inside. 9. The rotating electric machine according to claim 1, wherein the rotating electric machine is an AC motor and / or a generator, and the core is a stator core. 10. A winding step of winding a conductor into a predetermined shape, and another opposing first side of the coil wound in the winding step is pressed by a first jig. Second 2
A twisting step of twisting the sides while sandwiching the sides with the second jig; and inserting the first two sides into the slots of the core so that the second two sides are along both end surfaces of the core. And a mounting step of mounting the coil on the core from a radial direction. In the twisting step, twisting of the second side with respect to the first side inserted into the slot to form a slot portion. By providing a different center, the second two sides form a plurality of phases of coils that become coil end portions disposed at different positions in the radial direction with respect to the core. Production method. 11. The method for manufacturing a rotating electric machine according to claim 10, wherein in the winding step, the circumferences of the coils to be aligned and wound are made different. 12. The coil wound in the winding step has a substantially rectangular shape, and at least two opposing sides thereof have a predetermined angle with respect to a center axis thereof. A side corresponding to the second side to be the coil end portion, a large diameter portion of the two sides being an outer diameter side of the coil end portion;
The method for manufacturing a rotating electric machine according to claim 11, wherein the small diameter portion of the side is twisted such that the small diameter portion is on the inner diameter side of the coil end portion. 13. A first forming step of forming the first side so as to fit the slot, and a step of forming the second side such that a height direction of the coil in the twisted state is smaller than a width direction. 13. A method for manufacturing a rotating electric machine according to claim 10, further comprising: a second forming step of forming into a long flat shape. 14. The method according to claim 13, wherein the first forming step is performed by the first jig, and the second forming step is performed by the second jig. 15. The method according to claim 15, wherein, in the twisting step, the coil is formed in a round portion between the first side pressed by the first jig and a second side sandwiched by the second jig. The method for manufacturing a rotating electric machine according to any one of claims 10 to 14, wherein the rising portion is formed by twisting and deforming substantially 90 degrees, and the rising portion is accommodated within the width of the teeth of the core. 16. One of the second jigs sandwiching the second side used in the twisting step has a groove for accommodating the second side, and forms a bottom surface of the groove. A bottom portion having a predetermined thickness, and a coil inner end surface of the second side serving as the coil end portion is formed to be outwardly separated by a predetermined amount from a start end portion moving from the slot portion to the rising portion, A method for manufacturing a rotating electric machine according to claim 15. 17. One of the second jigs sandwiching the second side used in the twisting step releases the round portion, and the other of the second jigs fixes the round portion. 17. The rotation according to claim 16, further comprising a contact portion for regulating, and wherein the contact portion has a relief portion substantially corresponding to the predetermined thickness of the bottom of the concave groove on one of the second jigs. Manufacturing method of electric machine.