JP2002369428A - Dynamo-electric machine with plate-shaped conductor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dynamo-electric machine which has a plate-shaped conductor, capable of avoiding an increase in iron loss due to the division of a stator core. SOLUTION: Stator coil 2 concentratedly wound around teeth 4 are formed by jointing two conductor piece blocks. As a result, increase in magnetic resistance loss can be prevented and slot occupying rate can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a rotating electric machine having a plate-shaped conductor.

[0002]

2. Description of the Related Art Conventionally, in order to improve the slot space factor, a square-shaped stator coil is formed by concentrating a plate-shaped conductor having a substantially rectangular flat cross section in a direction perpendicular to the direction of current conduction around a stator core. Has been proposed.

[0003]

However, since the slot opening is narrowed by the claw portion at the tip of the tooth, it is necessary to divide the stator core to insert the square-shaped stator coil into the tooth. There is. As a result, the magnetic resistance of the stator core increases, and it is difficult to avoid the performance of the rotating electric machine due to an increase in iron loss. Omission of the teeth claws also increases iron loss and lowers performance. It has also been proposed to bend the teeth claw later, but it has not been easy to bend the teeth claw.

[0004] The present invention has been made in view of the above problems, and has as its object to provide a rotating electric machine having a plate-shaped conductor capable of avoiding an increase in iron loss due to stator core division.

[0005]

According to a first aspect of the present invention, there is provided a rotating electric machine comprising: a plurality of slots formed at regular intervals in a circumferential direction; The stator includes a stator core having teeth at its tip end and protruding toward the peripheral surface of the rotor, and a polyphase stator coil housed in the slot and concentratedly wound around the teeth. In the rotating electric machine, the stator coil is formed by spirally laminating a plate-shaped conductor having a circumferential side longer than a radial side and having a flat cross section in a direction perpendicular to a current direction in a radial direction, and forming a square on the teeth. And each turn of the stator coil has a pair of slot conductor portions and a pair of coil end portions formed by two conductor pieces whose ends are joined to each other.

That is, in the present configuration, each turn of the stator coil concentratedly wound around the teeth is constituted by two conductor pieces, and the respective conductor pieces are joined in order to spirally stack the stator coils.

Thus, even if a claw for narrowing the slot opening is provided at the tip of the tooth, the slot conductor of each conductor piece can be axially fitted into the slot, thereby preventing an increase in magnetic resistance. In addition, the slot space factor can be improved while realizing a high-performance rotating electric machine. In addition, the use of the molded conductor piece reduces the swelling of the coil end in the axial direction, shortens the axial length of the rotating electric machine, and realizes a smaller and lighter rotating electric machine.

According to a second aspect of the present invention, the rotating electric machine has a plurality of slots formed on the inner peripheral surface and the outer peripheral surface at regular intervals in a circumferential direction, and a claw for narrowing an opening of the slot at a tip end. A stator core having teeth formed on an inner peripheral surface or an outer peripheral surface, and a slot on the inner peripheral surface side and a slot on the outer peripheral surface side of the stator core are sequentially inserted into the slots. In a rotating electric machine including a concentratedly wound polyphase stator coil, the stator coil is a plate-shaped conductor having a circumferential side set shorter than a radial side and having a flat cross section in a direction perpendicular to the current direction. Are spirally laminated in the circumferential direction and wound on the teeth in a square shape, and each turn of the stator coil has a pair of slot conductors formed by two conductor pieces whose ends are joined together and a pair of slot conductors. Characterized by having a coil end It is.

According to this configuration, the rotor is provided on each of both sides in the radial direction of the stator core, and each turn of the stator coil concentratedly wound around the stator core is formed by the slot on the inner peripheral side of the stator core and the outer periphery. The same operation and effect as those of the first aspect can also be achieved in the rotating electric machine in which the slot on the side is inserted.

According to a third aspect of the present invention, in the rotary electric machine according to the first or second aspect, one turn of the stator coil including two slot conductors and two coil ends is a pair of turns. The ends of the conductor pieces are joined at the coil end portions. This facilitates joining of the ends of the conductor pieces.

According to a fourth aspect of the present invention, in the rotary electric machine according to the first or second aspect, one of the two conductor pieces is connected to a pair of slot conductors and one end of each of the two slot conductors. And a coil-shaped conductor piece comprising one continuous coil end portion, and the other of the two conductor pieces is individually formed at both ends thereof on different sides of two adjacent U-shaped conductor pieces. It is characterized by comprising a substantially I-shaped coil end conductor piece which is joined to form one coil end portion.

Thus, the joining of the coil end conductor pieces to each other can be performed on one side of the stator core in the axial direction, thereby facilitating the operation. Also, even if the stator core axis length of the rotating electric machine is changed, the U-shaped conductor piece can be shared,
Even if the shape of the coil end conductor pieces is changed for reasons such as cooling, the U-shaped conductor pieces can be shared.

According to a fifth aspect of the present invention, in the rotating electric machine according to the first or second aspect, each of the two conductor pieces is a slot conductor and one coil end connected to one end of the slot conductor. And an L-shaped conductor piece comprising:

Thus, the slot conductor can be easily inserted into the slot, and the ends of the adjacent conductor pieces can be easily joined.

According to a sixth aspect of the present invention, in the rotating electric machine according to the first or second aspect, each of the two conductor pieces has a thick main portion and a thin end portion, and the thin end portion has a main surface. It is characterized by being joined to each other.

According to this configuration, a contact area much larger than a contact area obtained by joining the two conductor pieces at their end surfaces can be ensured. Even if the contact electric resistance per area is large, the contact resistance can be reduced as a whole. In addition, it is possible to easily secure electrical insulation between adjacent turns.

According to a seventh aspect of the present invention, in the rotating electric machine according to the sixth aspect, the conductor piece has a thickness equal to the thin end, and the first end has the thin end. , And a second piece superposed conductively on a portion other than the thin end of the first piece. According to this configuration, it is not necessary to make the end of the conductor piece thin, and the manufacturing process can be simplified.

According to an eighth aspect of the present invention, in the rotating electric machine according to the first or second aspect, the two conductor pieces are each formed of a U-shaped conductor piece having two slot conductor portions and one coil end portion. The two conductor pieces are electrically connected at main surfaces of the slot conductor portions adjacent to each other in the stacking direction.

That is, in the present configuration, two U-shaped conductor pieces are combined face-to-face, and the main surfaces of both slot conductors are electrically contacted with each other, so that a large contact area can be ensured and the adjacent turns can be secured. It is possible to secure a long creeping discharge distance with the bonding surface of the metal, and thus it is excellent in securing electrical insulation.

In the above-mentioned joining of the two conductor pieces, for example, a solder or brazing material is applied to the exposed main surface of one of the slot conductor portions, and a current is applied to the stator coil to form a contact surface having a large contact resistance. In addition to the heat generated by melting the solder and the brazing material, it is also possible to simply press the laminated conductor pieces in the laminating direction.

According to a ninth aspect of the present invention, in the rotating electric machine according to any one of the first to eighth aspects, the rotating electric machine further comprises:
When being disposed with the same axial position as the crankshaft between the vehicle engine and the torque transmission mechanism disposed behind the vehicle engine, the axial dimension is reduced and the space is increased. The effect of being able to provide a rotating electrical machine with improved efficiency and improved performance can be provided.

According to a tenth aspect of the present invention, in the rotary electric machine according to any one of the first to ninth aspects, the cross-sectional area of the coil end portion is smaller than the conductor cross-sectional area of the slot conductor portion. The space margin in the above-mentioned joining increases.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the rotating electric machine according to the present invention will be described with reference to the following embodiments.

[0024]

Embodiment 1 FIGS. 1 to 3 show an embodiment of a rotating electric machine according to the present invention.
This will be described below with reference to FIG.

1 is a stator core, 2 is a stator coil, 3 is a slot, 4 is a tooth, 5 is a claw portion of a tooth 4, and slots 3 and 4 are formed on the inner peripheral surface of the stator core 1. Have been.

The stator coil 2 is a three-phase coil, and each phase coil is separately concentrated around a different tooth 4. As shown in FIGS. 1 to 3, the stator coil 2 has a flat cross section in a direction perpendicular to the current direction, and a resin-coated plate-like conductor 6 is spirally wound around a tooth.
It is configured to be laminated in the radial direction.

In the flat cross section of the plate-shaped conductor 6, the circumferential side in the circumferential direction (of the rotating electric machine) is set longer than the radial side (in the rotating electric machine).

One turn of the stator coil 2 is performed as usual.
Two slot conductor parts a and b and two coil end parts
and a pair of conductor pieces 21 and 22 joined together.

The conductor piece 21 has a pair of slot conductors a and b.
And one coil end portion c connected to one end of each of the slot conductor portions a and b. The slot conductors a and b are inserted into two slots adjacent to each other with the teeth interposed therebetween, but the tips of the slot conductors a and b slightly protrude from the slots. That is, to be precise, the coil end on the coil end portion d side is configured together with the coil end portion d.

The conductor piece 22 is a coil end conductor piece constituting the coil end portion d and is formed substantially in an I shape. Both ends of the long side surface of the conductor piece 22 are two U-shaped conductor pieces 2 adjacent to each other in the surface radial direction (of the rotating electrical machine).
Each of the slot conductors a and b is joined to the end face. As described above, at the center in the circumferential direction of the conductor piece 22,
A step is provided in the radial direction for one turn. Reference numeral 7 denotes a transition conductor.

The slot conductor portions a and b of each U-shaped conductor piece 21
Are inserted into the slots 3, and the exposed end faces of the slot conductor portions a and b of each of the U-shaped conductor pieces 21 are joined to the exposed both ends of the longer side of the substantially I-shaped coil end conductor piece 22. I have. This joining can be performed collectively by, for example, brazing.

(Modification) A modification is shown in FIG. In this modification, the substantially I-shaped coil end conductor piece 22 includes:
Protruding plate portions 22a and 22b project from both end portions toward both ends of the U-shaped conductor piece 21. In this way, the joining of both conductor pieces 21 and 22 can be facilitated.

(Modification) In the above embodiment, the axial width of the coil end portions c and d is shorter than the circumferential width of the slot conductor portions a and b. Since the coil end portions c and d have better cooling properties than the slot conductor portions a and b, the coil end portions c and d
Has a high resistance to an increase in heat generation due to an increase in its electric resistance value. Therefore, by reducing the axial width of the coil end portions c and d, the axial length of the rotating electric machine can be shortened and downsizing can be achieved.

(Modification) A modification is shown in FIG. In this modification, each turn of the stator coil 3 is an L-shaped conductor piece 23 composed of a slot conductor portion a and a coil end portion c.
And an L-shaped conductor piece 24 composed of a slot conductor part b and a coil end part d. In FIG. 5, the end face of the coil end part c of the upper L-shaped conductor piece 23 is It is joined to the side end surface of the coil end portion e that projects out of the slot from the end of the slot conductor portion b of the conductor piece 24. Also, the coil end portion d of the upper L-shaped conductor piece 24
Of the slot conductor portion a of the lower L-shaped conductor piece 23
Is joined to the side end surface of the coil end f projecting out of the slot from the end. Even in this case, the same effect as described above can be obtained.

(Modification) Another modification will be described below with reference to FIGS.

FIG. 6 is a schematic view of a conventionally known rotary electric machine of a two-rotor radial arrangement type.
Is an outer rotor, 102 is an inner rotor, 103 is a rotating frame, 104 is a pin, 105 is a crankshaft, 10
01 is a cylindrical stator core, 1002 is a stator coil,
1011 is a cylindrical iron core of the outer rotor 101;
Denotes a permanent magnet of the outer rotor 101, 1021 denotes a cylindrical iron core of the inner rotor 102, and 1022 denotes a permanent magnet of the inner rotor 102.

The rotating frame 103 includes a permanent magnet 101
The cores 1011 and 1021 to which the reference numerals 2 and 1022 are fixed are connected to the crankshaft 105.

The stator core 1001 is fixed to a housing (not shown) through pins 104. Stator core 1
001 has slots and teeth 1001a on both the inner and outer peripheral surfaces, as shown in FIG.

Each turn of the stator coil 1002 is laminated in the circumferential direction, and each turn of the stator coil 1002 has a slot conductor portion a inserted into the outer peripheral side slot and a slot conductor portion a at the same circumferential position as the inner peripheral side slot. Inner circumference slot conductor b
And a coil end c connecting these slot conductors a and b.
And one end is joined to the end surface of the slot conductor portion a of one U-shaped conductor piece 10021, and the other end is connected to the one U-shaped conductor piece 10021.
The slot conductor portion b of the U-shaped conductor piece 10021 adjacent to
And a coil end conductor piece 10022 joined to the end surface of the coil. 1007 is a transition conductor.

The stator coil 1002 in this embodiment
Has the same conductor piece joining structure as the one-rotor type rotating electric machine shown in FIG.
The same effect as described above can be obtained.

(Modification) Another embodiment will be described below with reference to FIG.

A groove 21a is recessed at the tip of the slot conductor portions a and b of the U-shaped conductor piece 21, and the coil end conductor piece 2
At both end portions of 2, two convex portions 22a to be press-fitted into the grooves 21a are formed. By doing so, the two conductor pieces 21, 2
2 can be strengthened, and both conductor pieces 21
The contact area of the contact 22 can be increased to reduce the contact electric resistance.

(Modification) Another embodiment will be described below with reference to FIG.

In this embodiment, the shape of the groove 21a shown in FIG. 9 is changed. The groove 21b is a dovetail groove having a narrow tip opening width (circumferential direction). 22b is also formed in a shape that can be fitted into this groove 21b. The protrusion 22b is disposed in the stacking direction, that is, in FIG.
6 in the radial direction and in FIG. 6 in the circumferential direction.

In this way, the mechanical coupling between the two conductor pieces 21 and 22 can be further strengthened, and the two conductor pieces 21 and 22 can be used.
The contact area of the contact 22 can be increased to reduce the contact electric resistance.

[0046]

Embodiment 2 Another embodiment of the rotating electric machine according to the present invention is shown in FIG.
This will be described below with reference to FIG. FIG. 11 is an enlarged view of a part of the U-shaped conductor piece 100021 and the I-shaped coil end conductor piece 100022 before joining, and FIG.
Although a part of the U-shaped conductor piece 100021 and the coil end conductor piece 100022 after the joining are enlarged and shown, it is obvious that the present invention can also be applied to an L-shaped conductor piece. In addition, an example in which the present invention is applied to the radial two-rotor electric rotating machine shown in FIG. 6 is shown.

In this embodiment, the tip portions X of the slot conductor portions a and b (see FIG. 8) of the U-shaped conductor pieces 100021 projecting in the axial direction from the slots of the stator core are the other main portions. In comparison with, the two main surfaces are cut from one side and thinned. Similarly, both end portions Y of the coil end conductor piece 100022 constituting the coil end portion d are also cut from one side of the two main surfaces and thinner than the other main portions. As a result, as shown in FIG. 12, the thin end portions X and Y are in close contact with each other and have the same thickness as the other portions as a whole.

According to the end connection system of this embodiment configured as described above, since the contact area between the two conductor pieces 100021 and 100022 is large, the contact electric resistance can be made much smaller than in the first embodiment. Furthermore, since the creeping discharge distance between the joining surfaces adjacent to each other can be ensured by the thickness of the thin ends X and Y, the reliability of electric insulation can be improved. In the first embodiment, the creeping discharge distance between the joining surfaces adjacent to each other is determined by the conductor pieces 100021 and 1000021.
022 of the thickness of the insulating film.

The main surfaces of the thin ends X and Y that come into contact with each other are thinly coated with solder or brazing material, and are joined by energizing the stator coil or by overheating as a whole.

(Modification) Modifications are shown in FIGS.

In this embodiment, a U-shaped conductor piece 100021 shown in FIGS. 11 and 12 is formed by laminating two plate-shaped conductors S and T adjacent to each other. To two adjacent plate-shaped conductors M,
N is laminated.

Each of the plate-shaped conductors S, T, M and N is formed to have the same thickness over the entire length. Of course, different plate conductors can have different thicknesses. Also,
One of the plate-shaped conductors S and T is formed to be longer than the other and has a thin end portion X. Similarly, one of the plate-shaped conductors M and N is formed to be longer than the other, and has a thin end portion Y.

By doing so, the conductor pieces 100021,
The step of thinning the end of 100022 can be omitted. The two conductors to be bonded are, of course,
The main surfaces of contact with each other should be stripped of the resin film so as to be electrically conductive, and should preferably be soldered or brazed.

Further, in this embodiment, the U-shaped conductor pieces 10
A groove G is formed in the main surface of the thin end X of the thin film 221 in the radial direction, and solder is piled in the groove G. By doing so, the solder can be melted in the heat bonding, and good bonding can be performed.

[0055]

Embodiment 3 Another embodiment of the rotating electric machine according to the present invention is shown in FIGS.
This will be described below with reference to FIG.

FIG. 15 is a sectional view of two U-shaped conductor pieces 201 and 202 constituting one turn of the stator coil. The U-shaped conductor piece 201 has slot conductor portions a and b and a coil end portion c, and the U-shaped conductor piece 202 has slot conductor portions a ′ and b ′ and a coil end portion d (not shown in FIG.
FIG. 17).

The resin film on the upper main surface S1 of the slot conductor portion a of the U-shaped conductor piece 201 and the resin film on the lower main surface S2 of the slot conductor portion b are peeled off. Similarly, the resin film on the upper main surface S3 of the slot conductor portion b 'of the U-shaped conductor piece 202 and the resin film on the lower main surface S4 of the slot conductor portion a' are peeled off.

The pair of U-shaped conductor pieces 201 and 202
Are inserted into the slots through different slot openings with the teeth (not shown) interposed therebetween, and then they are brought into close contact with each other. In order to facilitate the slot insertion operation of the U-shaped conductor pieces, after each U-shaped conductor piece 201 is inserted into the slot at a predetermined interval, each U-shaped conductor piece 202 is inserted into each U-shaped conductor piece. It is preferable to insert individually into the above-mentioned space between the conductor pieces 201.

Next, while pressing each of the U-shaped conductor pieces 201 and 202 in the laminating direction, the lower main surface S2 of the slot conductor portion b and the upper main surface S3 of the slot conductor portion b 'are brought into close contact with each other, Upper main surface S1 of portion a and lower main surface S of slot conductor portion a '
4, and the solder applied to these main surfaces is melted by utilizing the heat generated by the contact electric resistance of these contact surfaces by electric heating, and the U-shaped conductor pieces 201 and 202 are sequentially joined and fixed. Complete the child coil. FIG. 18 shows the completed state. The part with XXX is the solder joint surface.

According to the end connection method of this embodiment configured as described above, the contact area between the two U-shaped conductor pieces 201 and 202 is remarkably large.
And the creepage discharge distance between the joining surfaces adjacent to each other can be secured by twice the thickness of the U-shaped conductor piece, thereby improving the electrical insulation reliability. You can also. Further, in this embodiment, the cross-sectional area of the coil end portions c and d can be made half of the slot conductor portions a and b, and the generated gap can be used as a cooling air passage. Of course, the thickness of the coil end portions c and d can be larger than that of the slot conductor portion.

[Brief description of the drawings]

FIG. 1 is a partial radial direction schematic cross-sectional view of a one-rotor type rotating electric machine according to a first embodiment.

FIG. 2 is a partial schematic perspective view of the one-rotor electric rotating machine of FIG. 1;

FIG. 3 is a partial schematic perspective view showing joining of two conductor piece blocks of the stator coil of FIG. 1;

FIG. 4 shows a stator coil as a modification of the first embodiment.
It is a partial schematic perspective view showing a turn.

FIG. 5 shows a stator coil as a modification of the first embodiment.
It is a partial schematic perspective view showing a turn.

FIG. 6 is a schematic cross-sectional view of a two-rotor electric rotating machine as a modification of the first embodiment.

FIG. 7 is a partial schematic perspective view of a two-rotor rotary electric machine according to a second embodiment.

FIG. 8 is a partial schematic perspective view showing the joining of two conductor piece blocks of the stator coil of FIG. 7;

FIG. 9 shows a stator coil as a modification of the first embodiment.
It is a partial schematic perspective view which shows a turn (before joining).

FIG. 10 is a partial schematic perspective view showing one turn (after joining) of the stator coil of FIG. 9;

FIG. 11 is a partial schematic perspective view showing a part (before joining) of one turn of a stator coil as a modification of the second embodiment.

12 is a partial schematic perspective view showing a part (after joining) of one turn of the stator coil of FIG. 11;

FIG. 13 is a partial schematic perspective view showing a part (before joining) of one turn of a stator coil as a modification of the second embodiment.

14 is a partial schematic perspective view showing a part (after joining) of one turn of the stator coil of FIG. 13;

FIG. 15 is a schematic cross-sectional view showing a stator coil according to a third embodiment before one-turn bonding.

16 is a schematic cross-sectional view showing the stator coil of FIG. 15 after one-turn bonding.

17 is a schematic plan view showing the stator coil of FIG. 15 before one-turn bonding.

18 is a partial schematic cross-sectional view showing a state where the teeth winding of the stator coil of FIG. 15 is completed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stator core 2 Stator coil 21 Conductor piece 22 Conductor piece

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Masahiro Seguchi 1-1-1 Showa-cho, Kariya-shi, Aichi F-term in DENSO Corporation (Reference) 5H603 AA01 BB01 BB02 BB07 BB09 BB12 CA01 CA05 CB01 CC11 CC17 CD22 CE02 EE01 EE01 EE02 EE03 FA16 5H607 AA00 BB01 BB02 BB07 BB14 CC05 FF22

Claims (10)

[Claims] 1. A tooth protruding toward the peripheral surface of a rotor having a plurality of slots formed at regular intervals in a circumferential direction and a claw portion for narrowing an opening of the slot at a tip end portion. And a multi-phase stator coil accommodated in the slot and concentratedly wound around the teeth, wherein the stator coil has a circumferential side longer than a radial side. Then, a plate-shaped conductor having a flat cross section in a direction perpendicular to the current direction is spirally laminated in a radial direction and wound around the teeth in a square shape, and each turn of the stator coil is joined to each other. 2
A rotating electric machine having a pair of slot conductors and a pair of coil ends formed by two conductor pieces. And a plurality of slots formed on the inner peripheral surface and the outer peripheral surface at regular intervals in a circumferential direction, and a claw portion for squeezing an opening of the slot at a distal end portion. A stator core having teeth formed on an outer peripheral surface thereof; and a multi-phase winding concentratedly wound around the slot by sequentially inserting the slots on the inner peripheral surface side and the slots on the outer peripheral surface side of the stator core. A stator coil, wherein the stator coil is formed by helically laminating plate-shaped conductors having a circumferential side shorter than a radial side and having a flat cross section in a direction perpendicular to a current direction in a circumferential direction. Then, the stator coil is wound in a square shape, and each turn of the stator coil is
A rotating electric machine having a pair of slot conductors and a pair of coil ends formed by two conductor pieces. 3. The rotating electric machine according to claim 1, wherein one turn of the stator coil including two slot conductor portions and two coil end portions is configured such that ends of a pair of conductor pieces are formed by the coil. A rotating electric machine formed by joining at an end portion. 4. The rotating electric machine according to claim 1, wherein one of the two conductor pieces has a pair of slot conductor portions,
It comprises a U-shaped conductor piece comprising one coil end portion connected to each end of each of the two slot conductor portions, and the other of the two conductor pieces is different from each other in the two adjacent U-shaped conductor pieces. A rotating electric machine comprising a substantially I-shaped coil end conductor piece having both ends individually joined to an end on the side to constitute one coil end portion. 5. The rotating electric machine according to claim 1, wherein each of the two conductor pieces has one slot conductor and one coil end connected to one end of the slot conductor. A rotating electric machine comprising a conductor piece. 6. The rotating electric machine according to claim 1, wherein each of the two conductor pieces has a thick main portion and a thin end, and is joined to each other at a main surface of the thin end. A rotating electric machine characterized by the above-mentioned. 7. The rotating electric machine according to claim 6, wherein the conductor piece has a thickness equal to the thin end and an end of the first piece forms the thin end. A rotating electric machine comprising a second piece conductively overlapped with a portion other than the thin end. 8. The rotating electric machine according to claim 1, wherein the two conductor pieces are each formed of a U-shaped conductor piece having two slot conductor portions and one coil end portion.
A rotating electric machine, wherein the two conductor pieces are electrically connected at main surfaces of the slot conductor portions adjacent to each other in the stacking direction. 9. The rotating electric machine according to claim 1, wherein the same axial center position as that of a crankshaft is provided between a vehicle engine and a torque transmission mechanism disposed behind the vehicle engine. A rotating electric machine, wherein the rotating electric machine is arranged so as to be driven by the crankshaft. 10. The rotating electrical machine according to claim 1, wherein a sectional area of the coil end portion in a direction perpendicular to a current direction is smaller than a sectional area of the slot conductor portion in the same direction. And a rotating electric machine.