JP2003333782A - Electric rotating machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve a space factor of a coil while preventing displacement of an element wire by stably winding the coil, in an electric rotating machine constituted by annularly connecting a plurality of split cores winding the coil to an insulator. <P>SOLUTION: The last winding B13 in a second layer and a first winding C1 in a third layer are crossed, to make the first winding C1 in this third layer pass through an aligned groove part 206 formed by the last winding B13 in the second layer and a winding B12 in one step before the last winding B13. A second winding C2 in the third layer is made to pass through a groove part 210 formed between the last winding B13 in the second layer and an introduced end part 207. A third winding C3 in the third layer is made to pass through a groove part 214 formed between the first winding C1 in the third layer and the second winding C2 in the third layer. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary electric machine, for example, a rotary electric machine such as a motor or a generator, and more particularly, a plurality of pole portions each having a winding of three or more layers wound as a coil are arranged in an annular shape. Regarding electric rotating machines.

[0002]

2. Description of the Related Art Some stators of rotary electric machines are composed of a plurality of split cores. The split core includes an arc-shaped yoke portion and a pole portion extending in the inner diameter direction, and a coil is wound around the pole portion.

In this type of stator, it is desired that the number of turns of the coil wound around each split core be increased to maximize the space factor of the coil wound around the insulator. Further, the coil must be reliably wound so that the coil shape is not destroyed by impact or vibration.

[0004]

Problems to be Solved by the Invention As shown in FIG.
In order to improve the space factor with respect to the space formed by the insulator, it is conceivable to thinly form the coil winding portion 500 forming the insulator. In this case, the lead-in end 502 of the coil protrudes from the coil winding portion 500 and affects the second layer and the third layer of the coil.

Specifically, the winding C of the first winding of the third layer
1 cannot sufficiently enter the groove 506 formed between the final winding portion 504 of the second layer and the introduction end portion 502. Therefore, the second winding C2 of the third layer, which is the next winding part, is wound so as to ride on the final winding part 504 of the second layer. Subsequent windings, that is, the windings C3, C4, ... Similarly ride on the respective windings of the second layer. As a result, the windings on the second and third layers have contact points 5 respectively.
08a, 508b, 508c ...

As described above, the winding of the third layer is unstable because it is in contact with the winding of the second layer only at the contact point 508, and there is a possibility that the coil shape may be broken by shock or vibration. is there.

Further, when the winding of the third layer and the winding of the second layer are in contact with each other only at the contact point 508, the heat transfer from the second layer to the third layer is low and the first layer is low. Also, there is a disadvantage that the temperature of the second layer winding tends to rise.

In order to avoid such inconvenience, FIG.
As shown in FIG. 5, the winding C1 is wound around the alignment groove 512 between the final winding portion 504 of the second layer and the winding portion 510 one step before the winding C1. (Winding C
3, C4 ...) may be sequentially arranged and wound. However, in this method, the space formed between the final winding portion 504 of the second layer and the introduction end portion 502, that is, the groove portion 506 becomes large, and so-called dead space occurs, so that the coil insulator is formed. The space factor for is reduced. Further, the final winding portion 504 of the second layer may be displaced into the groove portion 506 due to impact or vibration.

The present invention has been made in consideration of such a problem, and prevents the displacement of the wire by stably winding the coil, and the stator having a high space factor of the coil with respect to the insulator. It aims at providing the rotary electric machine which has.

[0010]

A rotating electric machine according to the present invention is a rotating electric machine having a stator in which a plurality of pole portions around which coils of three or more layers are wound are annularly arranged, and the pole portions are The first wire of the coil is connected to the first end of the wire, the second winding layer of the coil is connected to the final winding portion of the second layer, and the second winding wire of the second layer is connected to the first winding layer of the second layer. It is characterized by having a first winding portion of a third layer that intersects with the final winding portion.

With this structure, the coil can be stably wound and the displacement of the wire can be prevented.

In this case, the first winding portion of the third layer is
You may make it pass through the alignment groove part which two continuous windings of a 2nd layer make.

The second winding portion of the third layer is the second winding portion.
You may make it pass through the groove part formed between the final winding part of the layer and the said introduction | transduction end part.

Further, the third winding portion of the third layer passes through a groove portion formed between the first winding portion of the third layer and the second winding portion of the third layer. You may

According to the winding mode as described above, the space factor of the coil with respect to the insulator can be improved and each winding can be stably wound.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of a rotating electric machine according to the present invention will be described below with reference to the accompanying FIGS.

As shown in FIG. 1, a stator 10 which employs the connection structure according to the present embodiment is a so-called three-phase Y-type stator, and three-phase input terminals U, V, W and 18 are provided.
And the divided cores 12.

As shown in FIGS. 2 to 5, the split core 12 in a state before the stator 10 is assembled is a laminated steel plate 24 in which a plurality of substantially T-shaped steel plates punched by a press are caulked and integrated with each other. Insulators 21 and 22 that insulate the laminated steel plate 24, and a coil 1 wound around the laminated steel plate 24 via the insulators 21 and 22.
4 and terminals 18 and 28 made of metal.

The laminated steel plate 24 has a substantially T shape, and is "T".
The portion 24a corresponding to the upper side of the letter becomes a yoke in the stator 10. Further, the portion 24b corresponding to the lower side extending portion of the "T" is the pole portion (or salient pole portion) of the stator 10.

The coil 14 is a wire 13 having an insulating coating.
Consists of. The extending portion 16 which is one end of each coil 14 on the inner diameter side (arrow A side) of the stator 10 is provided with the split core 12
They are electrically connected to each other at the terminals 18 provided at and form a neutral point of the Y-connection. Each coil 1
The other end on the outer diameter side (the side opposite to the arrow A) of 4 is connected to one of the input terminals U, V, W by a ring-shaped input line bus bar (not shown). Specifically, every third 6
6 split cores 12 are connected to the input terminal U, other than that, every other 6 split cores 12 are connected to the input terminal V, and the remaining 6 split cores 12 are connected to the input terminal W. Has been done. Each split core 12, input terminals U, V, W
The input line bus bar and the input line bus bar are assembled on a hollow housing (or case) 19.

The terminal 18 has a connecting annular groove 8 which will be described later.
8 and is insulated by the sealant 20 injected into the connecting annular groove 88.

As described above, the split core 12 includes the coil 1
A metal terminal 18 for fixing and electrically connecting the extending portion 16 which is one end on the inner diameter side of the coil 4, and the coil 1.
4 includes a metal terminal 28 for fixing one end portion 26 on the outer diameter side of 4 and electrically connecting it. Terminal 1
8 and the terminal 28 are made of the same member.

The extending portion 16 has a first extending portion 16a extending to the inner diameter side, a second extending portion 16b extending in the circumferential direction, and a third extending portion 16c extending to the outer diameter side. And a curved or bent structure. The root portion of the first extending portion 16a is the terminal 1
8 is electrically connected to a first fixing portion 18b, which is one end of the first fixing portion 18b, and its position is fixed, while the first extending portion 16a has two cutout portions 30 provided before and after the first fixing portion 18b. And 32 are guided in the direction of arrow A.

The second extending portion 16b is the first extending portion 16
The third extending portion 16c is curved or bent so as to be orthogonal to a.
Extends so as to be more orthogonal to the second extending portion 16b. In fact, the first extending portion 16a and the second extending portion 1
6b and the third extending portion 16c are located in the same virtual plane.

As shown in FIGS. 3 to 5, the terminal 18
(And 28) are substantially T-shaped metal terminals and are inserted into the groove 70 (84) of the insulator 21.
a (28a) and a first fixing portion for fixing the first extending portion 16a
The fixed portion 18b (28b) and another adjacent split core 12
Second fixing portion 18c (28) for fixing the third extending portion 16c of
c) and. A small projection (engagement portion) 18 pressed by a punch or the like is provided at a slightly upper portion of the insertion portion 18a (28a).
d (28d) is provided.

As shown in FIG. 4, the insulators 21 and 22 have coil winding portions 3 around which the coil 14 is wound.
4, 36, and peripheral walls 40 and 42 provided on the inner diameter side and perpendicular to the surfaces of these coil winding portions 34 and 36.
And peripheral walls 44 and 46 provided on the outer diameter side and perpendicular to the surfaces of the coil winding portions 34 and 36. The coil winding portion 34 and the coil winding portion 36, the peripheral wall 40 and the peripheral wall 42, and the peripheral wall 44 and the peripheral wall 46 are partially overlapped and coupled with each other. That is, the insulator 22 is inserted from below the insulator 21 so that both insulators 21 and 22 are inserted.
And are integrated. A large number of laminated steel plates 24 are inserted into the hole 48 at the center obtained as a result of such integration, and the laminated steel plates 24 and the coil 14 are electrically insulated.

Above the inner diameter side of the insulator 21 (opposite direction when the direction of the insulator 22 is downward), a part of the peripheral wall 40 is formed, and a first upper wall 50 standing upright in the axial direction of the stator 10 is formed. A second upper wall 52 which is spaced from the first upper wall 50 on the inner diameter side and is substantially parallel to the first upper wall 50.
And a connecting surface 54 connecting the lower ends of the first upper wall 50 and the second upper wall 52.

The insulator 21 has two pedestals 56 and 58 extending from the left and right roots of the second upper wall 52 toward the inner diameter side. Among these, in the table part 58 on the right side in FIG. The guide portion 60 has a thick wall shape for guiding. The guide portion 60 forms one side surface of the cutout portion 30.

A notch 64 is provided at a position symmetrical to the notch 30 on the second upper wall 52. The notch 32 is provided in the first upper wall 50 in the outer diameter direction (the direction opposite to the arrow A) with respect to the notch 30.

A small piece 68 having a notch (engaged portion) 66 in the circumferential direction is erected on the slightly inner diameter side of the first upper wall 50, and between the small piece 68 and the first upper wall 50. In the groove 7
0 is provided.

The guide portion 60, the connecting surface 54, and the right side edge portion of the first upper wall 50 slightly project to form a projecting portion 72.

FIG. 5 shows a state in which the insulator 21 is viewed from diagonally above the back side of FIG. As shown in this FIG.
A cutout 74 through which the end of the coil 14 passes is provided slightly left of the center of the peripheral wall 44 (right in FIG. 5). Further, the left end portion (the right end portion in FIG. 5) of the peripheral wall 44 forms a recessed portion 76 on the inner surface side of the protruding portion 75 that slightly protrudes toward the outer diameter side. The right end portion of the peripheral wall 44 has a protruding portion 78 that slightly protrudes in a shape that fits into the recessed portion 76.
Are formed.

A small piece 80 having the same shape as the small piece 68 is provided upright on the outer peripheral side of the peripheral wall 44 at the center in the circumferential direction. The small piece 80 has a notch 82 extending in the circumferential direction.
Is provided. A groove 84 having the same shape as the groove 70 is provided between the small piece 80 and the peripheral wall 44.

At the left ends of the connecting surface 54, the first upper wall 50 and the second upper wall 52, respective inner side surfaces thereof are slightly recessed to form a recess 86. The recess 86 has a shape that meshes with the protrusion 72.

The material of the insulators 21 and 22 is, for example, PPS (polyphenylene sulfide).
Is preferable because it is excellent in heat resistance, mechanical strength, rigidity, electrical insulation, dimensional stability, and creep resistance.

Next, a method of assembling the split core 12 with the insulators 21 and 22, the terminals 18 and 28, the laminated steel plate 24, and the coil 14 will be described.

First, the groove 70 of the insulator 21 (see FIG. 3).
Insert the insertion portion 18a of the terminal 18 into the reference portion 18). The small protrusion 18d of the terminal 18 is formed by the cutout portion 66 of the small piece 68.
And acts as a retainer for the terminal 18.
Similarly, the insertion portion 28a of the terminal 28 is inserted into the groove 84 (see FIG. 3) of the insulator 21. Small protrusion 28d
Engages with the notch 82 and acts as a retainer for the terminal 28.

Next, a large number of laminated steel plates 24 are inserted into the holes 48 (see FIG. 4) formed by the insulators 21 and 22.

Then, the wire 1 is wound around the coil winding portions 34 and 36.
3 is wound and the coil 14 is formed. Specifically, FIG.
As shown in FIG. 1, first, the insulators 21 and 22 having the laminated steel plates 24 interposed therein are fixed by the first jig 100 and the second jig 102. The first jig 100 holds the outer diameter side of the insulator 21, that is, the peripheral wall 44 side. The first jig 100 is driven by a winding motor (not shown) to have an axial center C.
It can rotate around. The second jig 102 holds the inner diameter side of the insulator 21, that is, the peripheral wall 40 side.

Further, as shown in FIG. 7, the second jig 10
2, pins 102a, 102b, 102 provided on the upper surface of
Wire guide mechanism (not shown) for c and 102d
The strands 13 are sequentially entangled by. The end of the wire 13 before the pin 102a is chucked (not shown) by the second jig 1
It is fixed integrally with 02. The strand guide mechanism,
Further, the strand 13 is guided so as to be entwined with the side surface of the guide portion 60, and the strand 13 is guided to the coil winding portions 34 and 36 via the notch 30, the first fixing portion 18b, and the notch 32.
Guide At this time, the first extending portion 16a, the second extending portion 16b, and the third extending portion 16c are formed by the relative positions and shapes of the pins 102c and 102d and the guide portion 60.

The wire 1 guided to the coil winding portions 34 and 36.
The end of 3 is led out from the wire supply part 104. The wire supply unit 104 can advance and retreat in the direction of arrow B parallel to the axis C, and the amount of advance and retreat can be controlled in synchronization with the amount of rotation of the winding motor.

Then, the winding motor rotates the first and second jigs 100, 102 and the insulators 21, 22 about the axis C. At this time, the wire 13 is wound around the coil winding portions 34 and 36 while advancing and retracting the wire supply unit 104 in the arrow B direction according to the rotation amount of the winding motor.

Next, as shown in FIG. 8, after the wire 13 is wound and the coil 14 is formed, the wire 13 is guided by the wire guide mechanism through the notch 74 and the first fixing portion 28b. The pins 100a and 100b so as to be entwined with each other. The strand 13 is guided to the pin 100b so as to pass through the groove formed in the center.

Next, the wire 13 extending from the coil 14
Both ends of the are temporarily fixed by the first fixing portion 18b of the terminal 18 and the first fixing portion 28b of the terminal 28.

Further, the wire 13 extending from the coil 14
Both ends of the are cut at cutting points 106 and 108.
The cutting point 106 is between the pins 102c and 102d, and when the split core 12 is assembled to the stator 10 as described later, the third extending portion 16c is attached to the second fixing portion 18c of the split core 12 adjacent thereto. The position where it is located is suitable as this cutting position. In addition, the cutting point 108 is
It is on the slightly outer diameter side of the first fixing portion 28b.

Thereafter, the split core 12 is removed from the first jig 100 and the second jig 102, and the winding process of the coil 14 is completed.

Next, the wire 13 is attached to the coil winding portions 34 and 36.
The winding step of forming the coil 14 by winding
This will be described in detail with reference to FIG. 9 to 15, in order to facilitate understanding, the first jig 100, the second jig 102, and the strand supply unit 104 are not shown. Further, in FIGS. 9 to 15, the direction of arrow A is called downward and the opposite direction is called upward. Further, in the following description, the first winding of the first layer of the coil 14 is referred to as the winding A1.
, And winding A2, winding A3, ... The first winding of the second layer is the winding B1, and the winding B2,
Winding B3 ... Similarly, connect each winding of the third layer to winding C
n (n = 1, 2, 3 ...).

First, as shown in FIG. 9, the windings A1 to A15 of the first layer are sequentially aligned and wound upward. By winding 15 times in this way,
The coil winding portions 34 and 36 (see FIG. 4) are covered with the wire 13 with almost no space.

Next, from the groove portion 200 formed by the winding A15 and the peripheral wall 44 on the left side, the first layer winding A15 and the winding A are formed.
To the right alignment groove portion 202 formed by 14
To move to the winding of the second layer winding B1. The winding B
Since No. 1 is wound along the alignment groove portion 202, it can be stably wound.

After this, as shown in FIG. 10, the windings B1 to B13 (the final winding portion of the second layer) of the second layer are sequentially arranged and wound downward.

Next, from the groove portion 204 located immediately below the winding B13 on the left side, the winding B12 and the winding B of the second layer are inserted.
To the right alignment groove 206 formed by
To move to the winding of the third layer winding C1. At this time, the winding C1 is guided while intersecting with the winding B13.
Since the winding C1 is located in the alignment groove portion 206, it is stably wound.

Further, as shown in FIG. 11, the introduction end 207 into which the winding A1 is introduced from the notch 32 and the second layer winding from the groove 208 located right below the winding C1. To the groove 210 on the right side formed by the line B13
And winding the winding C2.

Next, as shown in FIG. 12, from the left alignment groove portion 212 formed by the winding B13 and the winding C1,
The element wire 13 is guided into the groove 214 on the right side formed by the windings C1 and C2 of the third layer, and the winding C3 is wound.

Then, as shown in FIG. 13, from the groove 216 located immediately below the winding C3 on the left side to the winding C1 on the right side.
The wire C13 is wound by guiding the wire 13 into the groove 218 located immediately above the wire C4.

After that, the third winding after the winding C4 is sequentially aligned and wound with the winding C1 as a reference, and is wound up to the winding C15 which abuts the peripheral wall 44 (see FIG. 14). After that, the fourth and fifth layers are wound to form a coil 14
(See FIG. 8).

FIG. 1 is a sectional view taken along line XV-XV in FIG.
5 shows. Since the winding C1 which is the first winding of the third layer is located in the alignment groove portion 206, it is stably wound. The winding C2 and the winding C3 have groove portions 210,
Since it is wound so as to fill the groove portion 214, the space factor of the coil 14 can be improved. Since the winding C4 and the subsequent windings are sequentially aligned and wound with the winding C1 as a reference, the winding can be performed stably and at high density. Further, since each winding is in contact with the winding on the lower layer at two points, it has good heat conductivity.

Next, the split core 1 around which the coil 14 is wound.
A procedure for assembling the stator 2 into the stator 10 will be described with reference to FIGS.

First, as shown in FIG. 16, the housing 1
The first split core 12 (discriminated as the split core 12a) is positioned and set at 9.

Next, as shown in FIG. 17, the second split core 12 (discriminated as split core 12b) is set on the right side of the split core 12a, that is, in the counterclockwise direction in FIG. At this time, when the split core 12b is set in the housing 19 from above, the third extending portion 16c of the coil 14 of the split core 12b is located on the second fixing portion 18c of the terminal 18 constituting the split core 12a. It will be. In this way, the coil 1 can be manufactured by a simple insertion method.
The fourth extending portion 16c of No. 4 is engaged with the second fixing portion 18c.

Further, at that time, the recessed portion 86 (see also FIG. 5) of the insulator 21 constituting the split core 12a and the projecting portion 72 of the insulator 21 on the split core 12b side mesh with each other, so that the connecting surfaces 54, A part of each of the first upper walls 50 and the second upper walls 52 overlaps and abuts each other, and the joint portion forms a surface without a step. In this way, at the connecting portion between the split cores 12a and 12b, the first upper wall 50 and the second upper wall 52 of the insulator 21 are joined together without a gap to form the connecting annular groove 88.

In addition, the third extending portion 16c is replaced by the second fixing portion 18
The step of engaging the c and the step of connecting the adjacent split cores 12b need not be performed simultaneously as described above. For example, after engaging the third extending portion 16c with the second fixing portion 18c, The split cores 12b may be connected.

Thereafter, the split core 12 is subjected to the same procedure.
Another split core 12 is sequentially connected to the left side of b up to the seventeenth split core 12 (discriminated as a split core 12q. See FIG. 18).

Next, as shown in FIG. 18, the last split core 12 (discriminated as a split core 12r) is set between the split cores 12q and 12a. At this time,
The extension 16 of the coil 14 on the split core 12a side is retracted to a position where it does not interfere with the split core 12r.

After setting the split core 12r, the extending portion 16 of the coil 14 on the split core 12a side is returned to its original position,
The split core 12r is engaged with the second fixing portion 18c.

The split core 12 does not have to be directly arranged in the housing 19, but may be arranged in a predetermined holder or ring and then press-fitted into the housing 19.

In this way, when the eighteen divided cores 12 are connected, the connecting annular groove 88 is formed.

Next, the first extending portion 16a of each coil 14
And the first fixing portion 18b of the terminal 18 are connected. In addition, the third extending portion 16c of each coil 14 and the terminal 18
The second fixing portion 18c is connected. Specifically, the first fixing portion 18b is thermocompression-bonded to the first extending portion 16a, and the insulating coating film coated on the first extending portion 16a is melted and removed. The copper wire 16a and the first fixing portion 18b are electrically connected. Similarly, the third extending portion 16c and the second fixing portion 18c are also connected by thermocompression bonding. In addition, by the same procedure, each split core 1
The second fixing portion 28c of the terminal 28 on the outer diameter side of 2
Is connected to the input line bus bar.

In this way, the common wires of the coils 14 are connected to each other via the terminals 18. At this time,
Since the terminal 18 is a part of the split core 12, it is not necessary to use a separate component for connection during connection work. That is, since a dedicated separate component such as a common wire bus bar or a printed circuit board is not required, the connection work can be performed easily and the number of assembly steps can be reduced.

The rotary electric machine according to the present invention is not limited to the above-mentioned embodiment, and it is needless to say that various configurations can be adopted without departing from the gist of the present invention.

[0070]

As described above, according to the rotary electric machine of the present invention, the coil can be stably wound to prevent the wire from being displaced, and the space factor of the coil with respect to the insulator can be improved. The effect that can be achieved can be achieved.

[Brief description of drawings]

FIG. 1 is a plan view in which a sealant is partially omitted in a stator of a rotating electric machine according to this embodiment.

FIG. 2 is a perspective view of a split core assembled to a stator.

FIG. 3 is a partially omitted perspective view of a terminal and an insulator to which the terminal is assembled.

FIG. 4 is a perspective view showing an insulator, a terminal, and a laminated steel plate.

FIG. 5 is a perspective view of an insulator and a terminal as viewed from the outer diameter direction.

FIG. 6 is an explanatory plan view showing a state in which the split core before the coil is wound is fixed to the jig.

FIG. 7 is an explanatory plan view showing a state immediately before a coil is wound around a split core.

FIG. 8 is an explanatory plan view showing a step of cutting a wire by winding a coil around a split core.

FIG. 9 is a process explanatory view showing a process of winding the first layer winding around the split core.

FIG. 10 is a process explanatory view showing a process of winding the second layer winding around the split core.

FIG. 11 is a process explanatory view showing a process of winding the split core from the second layer to the third layer.

FIG. 12 is a process explanatory view showing a process of winding the second winding of the third layer around the split core.

FIG. 13 is a process explanatory view showing a process of winding the third winding of the third layer around the split core.

FIG. 14 is an explanatory diagram showing a step of winding a third-layer winding around the split core.

15 is a cross-sectional view taken along line XV-XV of the split core in FIG.

FIG. 16 is a partially enlarged plan view of the stator with one split core set in the housing.

FIG. 17 is a partially enlarged plan view of the stator with two split cores set in the housing.

FIG. 18 is a partially enlarged plan view of the stator with 18 split cores set in the housing.

FIG. 19 is a partially enlarged cross-sectional view of a split core according to the related art (1).

FIG. 20 is a partially enlarged cross-sectional view of a split core according to the related art (No. 2).

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Stator 12 ... Split core 13 ... Elementary wire 14 ... Coil 16, 16a-16c ... Extension part 18, 28 ... Terminal 18b, 18c ... Fixed part 18d, 28d
... Small protrusion 20 ... Sealant 21,22 ... Insulators 30,32 ... Notches 50,52 ... Upper wall 54 ... Connecting surface 60 ... Guide 88 ... Connecting annular groove 206 ... Alignment groove 207 ... Introducing end 210,214
… Groove

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 5H002 AA07 AA08 AA09 AB01 AB06                       AC03 AC08                 5H603 AA03 AA09 BB01 BB02 BB12                       CA01 CA04 CA10 CB03 CB04                       CB11 CB16 CB26 CC11 CC17                       CD02 CD21 CD28 CD31 CE01                 5H604 AA08 BB01 BB03 BB14 CC01                       CC05 PB03 QB03 QB12                 5H615 AA01 BB01 BB02 BB14 BB16                       PP01 PP15 QQ02 QQ19 TT01

Claims (4)

[Claims] 1. A rotary electric machine having a stator in which a plurality of poles, each of which is wound with three or more layers of coils, is arranged in an annular shape, wherein the poles have an introduction end of a strand of wire connected to a first layer of the coil. Part, a final winding part of the second layer of the coil, a final winding part of the second layer, and a first layer of the third layer that intersects with the final winding part of the second layer. A rotating electric machine comprising: a winding part. 2. The rotating electric machine according to claim 1, wherein the first winding portion of the third layer passes through an alignment groove portion formed by two continuous windings of the second layer. Electric machinery. 3. The rotary electric machine according to claim 1, wherein the second winding portion of the third layer is formed between the final winding portion of the second layer and the introduction end portion. A rotating electric machine characterized by passing through a groove. 4. The rotating electric machine according to claim 3, wherein the third winding portion of the third layer includes a first winding portion of the third layer and a second winding portion of the third layer. A rotating electric machine characterized by passing through a groove portion formed therebetween.