JP2009106005A - Stator of rotating electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a stator of a rotating electric machine which can suppress an increase in current loss caused by a flow of a circulating current in an element wire conductor as a whole in an armature winding. <P>SOLUTION: A stator core 3 has a plurality of winding slots 6 which extend in the axial direction at the internal peripheral face of the core and are arranged in parallel with one another, average magnetic-body space factors at both ends of the axial direction and in the center of both the ends are made equal, the armature winding 2 is accommodated in the winding slots 6, a half-turn coil of an upper coil 2c and a half-turn coil of a lower coil 2d are constituted by binding the multiple element wire conductors, the element wire conductors are short-circuited at the half-turn coil of the upper coil 2c and the half-turn coil of the lower coil 2d, respectively, at coil ends which further extend via linear parts 2e outwardly protruding from both side ends of the stator core 3, respectively, the element wire conductors of the linear parts 2e extending to the outside from both side faces of the stator core 3 in the winding slots 6 of the stator core 3 are formed so as to be dislocated by continuously being twisted, and dislocation angles of the half-turn coils as a whole are set larger than 360°. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a stator of a rotating electrical machine, and more particularly to a stator of a rotating electrical machine in which a wire conductor of an armature winding is displaced.

  As shown in FIGS. 9 and 10, a conventional stator of a rotating electrical machine includes a stator core 3 provided with a plurality of winding slots 6 extending in the direction of the rotation axis of the rotor (not shown), and a winding The armature winding 2 is composed of an upper coil 2c and a lower coil 2d, each of which is composed of a large number of wire conductors 5 embedded in and stacked in the slot 6, and has a diameter inside the stator core 3 for cooling. A plurality of ventilation ducts 4 extending in the direction are provided at predetermined intervals. The strand conductor 5 is a portion housed in the winding slot 6 and is continuously twisted in the extending direction of the winding slot 6 and is typically formed to displace 360 degrees. The strand conductors 5 are short-circuited at both side portions of the armature winding 2 protruding outward from both side surfaces of the stator core 3.

 When an alternating current flows through the multi-wire conductor having such a configuration, a leakage magnetic flux crossing the winding slot 6 in the circumferential direction is generated, and this leakage magnetic flux causes the wire conductor 5 in each portion of the multi-wire conductor in the longitudinal direction. A voltage is induced during If an extremely large difference occurs in the induced voltage of each strand conductor over the entire length of the winding conductor in any strand conductor pair, a large circulating current, that is, the strand conductor pair, is generated in the closed loop strand conductor pair. The current circulating through the current flows, current loss increases, and heat generated inside the wire conductor also increases.

 Therefore, in order to prevent the circulating current from flowing by making the voltages induced between the strand conductors 5 substantially equal over the entire length of the strand conductor 5, the strand conductors 5 are transposed by the following method. ing.

 Here, the dislocation of the strand conductor 5 which is a conventional technique will be described. The dislocation of the strand conductor 5 is to twist the strand conductor 5 toward the extending direction of the winding slot 6. As a result, the position of each strand conductor 5 is sequentially changed, and it is considered that a certain strand conductor moves in a circle around the center of the cross section, and the degree of dislocation is expressed by the angle of rotation. The dislocation in which each strand conductor 5 is located at the same position as the starting position at the opposite end of the winding slot 6 through all positions in the cross section of the strand conductor 5 is called a 360-degree dislocation.

 FIG. 10 shows the magnetic flux interlinking between two typical wire conductors 5a and 5b. In the figure, the interlinkage magnetic flux in the slot 6 portion of the stator core 3 is shown as 9a to 9c. For example, since the sum of the interlinkage magnetic fluxes 9a and 9c is equal to 9b and has the opposite absolute value, the induced voltage between the strand conductors 5a and 5b due to the interlinkage magnetic flux in the winding slot 6 is canceled. It has a configuration.

 However, although 360 ° dislocation is performed in the winding slot 6, it is not dislocated outside the winding slot 6, that is, at the end of the coil extending in the axial direction from the side surface of the stator core 3. An unbalanced voltage is generated by the leakage magnetic flux 9v, 9w, 9x, 9y on the end side of the stator, and a circulating current is generated in the wire conductors 5a, 5b.

  FIG. 11 is a view of the stator of the rotating electric machine of FIG. 10 as viewed from the direction of the rotation axis. The upper coil 2c and the lower coil 2d have the same end length protruding from both side surfaces of the stator core and are embedded. The ends are connected on a line that bisects the angle connecting each winding slot 6 and the center point (O) (La = Lb). In other words, the end pitches a and b of the coil are made equal. Further, the end magnetic flux incident on the end of the upper coil 2c is larger than that of the lower coil 2d, and the induced voltage is larger in the upper coil 2c than in the lower coil 2d, the circulating current flows and the turn loss increases.

 Measures for reducing the circulating current in the wire conductor are described in Patent Documents 1 to 4, Non-Patent Document 1, and the like.

 Among these, Patent Document 1 provides a conductor element in a slot by providing a portion where the conductor strands are not evenly spaced in the slot, and a portion where the conductor is displaced in the circumferential direction and the radial direction and a portion where the dislocation does not occur. It is described that an unbalanced voltage is generated in the line and the unbalanced voltage generated in the conductor wire outside the slot is compensated by this unbalanced voltage.

 Non-Patent Document 1 and Patent Document 2 describe a method of reducing circulating current loss caused by the generation of an induced voltage due to leakage magnetic flux at the end of a wire conductor. Among them, Non-Patent Document 1 is to reduce the dislocation angle from 360 degrees, and Patent Document 2 is to change the position at which the dislocation gradient is changed in the case of 450-degree dislocation.

 Patent Document 3 is a problem in Patent Document 1, that is, when the number of dislocations of the wire conductor is large or when the winding slot axial length is short, the dislocation pitch is further shortened and the wire conductor is short-circuited. In order to improve the problem, the invention is as follows. That is, the wire conductors of the armature winding are continuously twisted in the extending direction of the winding slot except for both end portions of the armature winding protruding outward from both side surfaces of the stator core 3. The wire conductors formed so as to have different thicknesses in the stacking direction occupy the wire conductors arranged in the radial direction from the rotation center of the rotor at the both end portions with the thicker one closer to the rotor. The rotating electrical machine is arranged as described above.

 According to Patent Document 3, by configuring in this way, the resistance value of the wire conductor is reduced, current generation loss can be reduced, and no dislocation is provided unlike the prior art, so it is necessary to shorten the dislocation pitch. As a result, the circulating current loss can be reduced, and local heating of the armature winding can be suppressed.

 Patent Document 4 is a winding bar that is short-circuited at the end of the stator core, and the conductor bar that is the winding bar is composed of a number of conductor wires that are electrically insulated from each other. The wire conductor is a type of winding bar in which the conductor conductors are transposed based on the rable principle and the conductor strands in both end clip sections and the conductor strands in the active part section are transposed together. By configuring as above, the loop current can be further suppressed, and the temperature gradient pattern in the conductor bar can be further flattened.

 Patent Documents 1 to 4 and Non-Patent Document 1 described above all improve the stator winding itself, and do not improve the stator core as in the present invention.

 In Patent Document 5, a plurality of dislocation elements are transferred at the end of a multi-wire conductor for the purpose of easily connecting the dislocation wires and reducing the circulating current between the wires and reducing the loss. A wire pair is drawn out in a circumferential space between adjacent multiple strand conductors, and the strands are joined together so as to have an arbitrary dislocation angle.

In Patent Document 6, the problem in Patent Document 1, that is, when the number of dislocations of the wire conductor is large or when the winding slot axial length is short, the dislocation pitch is further shortened and the wire conductor is short-circuited. In order to improve the problem, the invention is as follows. That is, the wire conductors of the armature winding are continuously twisted in the extending direction of the winding slot except for both end portions of the armature winding protruding outward from both side surfaces of the stator core 3. The wire conductors formed in such a manner that the thicknesses in the stacking direction are different from each other are such that the wire conductors arranged in the radial direction from the rotation center of the rotor at the both ends of the wire conductors are thicker toward the rotor. It is the stator of the rotary electric machine arrange | positioned so that may occupy. According to Patent Document 6, by configuring in this way, the resistance value of the wire conductor is reduced, current generation loss can be reduced, and no dislocation is provided unlike the prior art, so it is necessary to shorten the dislocation pitch. As a result, the circulating current loss can be reduced, and local heating of the armature winding can be suppressed.
Japanese Patent Publication No.58-14141 US6703752 B2 JP-A-9-182339 JP 2002-78265 A Japanese Patent Publication No. 5-38539 JP 2006-109616 A Xu Shanchun, et al, “A New Transposition Technique of Stator Bars of The Hydrogenerator”, Proceedings of International Symposium on Salient-Pole Machines With Particular Reference to Large Hydro-Electric Generators and Synchronous Motors, (pp.384-389), Oct . 1993

 In the above-described prior art, when a 360-degree dislocation is performed in the winding slot 6, since the dislocation is not performed outside the winding slot 6, there is a leakage magnetic flux at the end, which causes a coil end (winding). A voltage is induced at the end of the wire conductor, and a circulating current flows in the wire conductor to cause current loss.

 Also, since the upper coil generally has a larger flux linkage than the lower coil, the circulating current loss is increased. Measures to reduce the circulating current in the wire conductor are described in the following documents (Patent Documents 1 to 4, Non-Patent Document 1), etc., but what is mentioned about the difference in loss between the upper coil and the lower coil Absent.

 SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and provides a stator for a rotating electrical machine capable of suppressing an increase in current loss caused by circulating current flowing in a wire conductor as an entire armature winding. The purpose is to obtain.

In order to achieve the above object, the invention corresponding to claim 1 is formed in a cylindrical shape as a whole, and a plurality of winding slots extending in the axial direction on the inner peripheral surface are arranged in parallel in the circumferential direction. In addition, a stator core formed such that a plurality of ventilation ducts are arranged in parallel in the axial direction,
A straight portion that is housed in the winding slot and bundles a large number of wire conductors to form a half turn coil of the upper coil and a half turn coil of the lower coil, and protrudes outward from both side surfaces of the stator core. Via an armature winding formed by short-circuiting the wire conductor for each half-turn coil of the upper coil and for each half-turn coil of the lower coil.
The strand conductors in the winding slots of the stator core and the strand conductors of the linear portion extending outward from both side surfaces of the stator core are continuously twisted and displaced. The stator of a rotating electric machine is characterized in that a dislocation angle in the whole half-turn coil is formed to be larger than 360 degrees.

In order to achieve the above object, the invention corresponding to claim 3 is formed in a cylindrical shape as a whole, and a plurality of winding slots extending in the axial direction on the inner peripheral surface are arranged in parallel in the circumferential direction. In addition, a stator core formed such that a plurality of ventilation ducts are arranged in parallel in the axial direction,
A straight portion that is housed in the winding slot and bundles a large number of wire conductors to form a half turn coil of the upper coil and a half turn coil of the lower coil, and protrudes outward from both side surfaces of the stator core. Via an armature winding formed by short-circuiting the wire conductor for each half-turn coil of the upper coil and for each half-turn coil of the lower coil.
A stator of a rotating electrical machine, wherein a coil end pitch of the upper coil is shorter than a coil end pitch of the lower coil.

  ADVANTAGE OF THE INVENTION According to this invention, the stator of the rotary electric machine which can suppress the electric current loss increase which generate | occur | produces when a circulating current flows into a strand conductor as the whole armature winding can be provided.

  Hereinafter, embodiments of a stator for a rotating electrical machine according to the present invention will be described with reference to the drawings.

(First embodiment)
The first embodiment will be described with reference to FIGS. 1, 2, and 3. The stator of the rotating electrical machine according to the first embodiment includes a stator core 3 and an armature winding 2. The stator core 3 is formed in a cylindrical shape as a whole, and a plurality of winding slots 6 extending in the axial direction on the inner peripheral surface thereof are arranged side by side in the circumferential direction and extend in the radial direction. A plurality of ventilation ducts 4 are arranged side by side at equal intervals in the axial direction, and are formed so that the average magnetic space factor is equal at both ends in the axial direction and the central portion between both ends. It is.

  Here, the magnetic body space factor is the ratio of the magnetic body portion to the entire iron core, and the magnetic body portion here is the insulator formed on the surface of the iron plate that is formed by stacking the air duct 4 and the iron core. This refers to the part that contributes to the magnetic resistance against leakage magnetic flux in the winding slot by a magnetic material such as an iron core excluding the above. If structures other than the stator core 3 are configured uniformly, it may be called the core space factor.

 The armature winding 2 is housed in the winding slot 6, and a large number of wire conductors are bundled to form an upper coil (one on the opening side of the winding slot 6) 2c half-turn coil and lower coil (winding). (On the bottom side of the wire slot 6) 2d half-turn coil, and at the coil end portion extending further in the axial direction through straight portions 2e protruding outward from both side surfaces of the stator core 3, The strand conductor is short-circuited for each half-turn coil of the upper coil 2c and for each half-turn coil of the lower coil 2d.

 In the stator of the rotating electrical machine having such a configuration, the wire conductor in the winding slot 6 of the stator core 3 and the wire conductor of the straight portion 2e extending outward from both side surfaces of the stator core 3 are arranged. The dislocation angle of the entire half-turn coil is formed to be larger than 360 degrees by continuously twisting and dislocation.

  In the embodiment configured as described above, a current flows through the armature winding 2 during load operation, and a current flows through each of the wire conductors. FIG. 1 shows a magnetic flux interlinking between two typical wire conductors 5a and 5b, and the interlinkage magnetic flux of the iron core portion is shown as 9d, 9e and 9f.

  In the conventional 360-degree dislocation of FIG. 10, the dislocation is performed only by the stator core 3 and is not dislocated at the coil end portion 2b. As described above, an unbalanced voltage is generated between the strands, and the loss due to the circulating current occurs. Will occur.

 Therefore, in the embodiment of FIG. 1 and FIG. 2, the total of the flux linkages 9v, 9w, 9x, and 9y at the end portion is made larger than that of the conventional example by performing the dislocation to the linear portion 2e at the coil end portion to be larger than 360 degrees. It can be made smaller. As a result, the unbalanced voltage is reduced and the occurrence of circulating current loss can be suppressed.

  According to the first embodiment, the unbalanced voltage is reduced in the whole wire conductor 5, the generation of the circulating current can be suppressed, and the circulating current loss can be reduced. This can suppress the loss of the armature winding as compared with the case of the 360-degree dislocation, which is the conventional technique described above. In particular, the effect is increased in the upper coil. An increase in current loss caused by circulating current flowing in the wire conductor can be suppressed.

  Next, the first embodiment will be described in more detail with reference to FIG. FIG. 3 shows both the upper coil 2c and the lower coil 2d in the first embodiment. The straight portion 2e at the coil end of the upper coil 2c is configured to be longer than the lower coil 2d, and more dislocations can be applied to the upper coil 2c than the lower coil 2d.

 In the present embodiment configured as described above, the end magnetic flux incident between the strands of the upper coil 2c can be reduced, and generation of further circulating current loss can be suppressed.

  Conversely, Modification 1 of the first embodiment of the present invention will be described with reference to FIG. Within the range corresponding to the dislocation angle of 180 degrees in the substantially central portion of the stator core 3 in the axial direction, the average magnetic body space factor is higher than that of the substantially central portion in the axial direction, for example, than both end portions of the stator core 3. A large sub-core part 7 is provided.

 Since it is a structure like FIG. 4, the flux linkage between strand 5a, 5b is strengthened in 9b. Here, the interlinkage magnetic flux 9b has a phase opposite to the sum of the interlinkage magnetic fluxes 9x, 9y, 9v, and 9w at the end, and works to cancel the induced voltage, thereby further reducing the occurrence of circulating current loss between the strands. Can be suppressed.

 By providing the sub-core part 7 in the stator core 3 in this way, parts with different pitches of the ventilation duct 4 are provided, and due to the unbalanced voltage caused by the non-uniformity of the core space factor, the above-mentioned end leakage magnetic flux causes By offsetting the unbalanced voltage and reducing the circulating current, the circulating current generated in the stator coil strands is reduced, and the temperature difference between the strands is made uniform, improving the efficiency and stator winding temperature. Can keep. As a result, the conventional problem is that, in the stator coil, the circulating current flows between the conductor wires due to the magnetic flux incident on the end, the loss increases, the efficiency decreases, and the loss distribution occurs between the strands. The temperature becomes non-uniform, and it is necessary to increase the cooling to cool the high temperature part.

  Next, Modification 2 of the first embodiment of the present invention will be described with reference to FIG. This is because the dislocation angle of the portion housed in the winding slot of the wire conductor is approximately 360 degrees, and the average magnetic material space factor is approximately the axial direction at the substantially central portion in the axial direction of the stator core. You may comprise so that it may become a magnetic body space factor different from the part different from parts other than a center part. Specifically, the dislocation angle of the wire conductor is within 90 degrees from each end of the stator core 3, and the average magnetic space factor of the stator core 3 is each of the stator core 3. The sub iron core part 7 smaller than the range within 90 degrees from the end part is provided.

 Even in the configuration as shown in FIG. 5, the interlinkage magnetic flux between the strands 5a and 5b is weakened at 9a and 9c, and the sum of the interlinkage magnetic fluxes 9a, 9b and 9c becomes the interlinkage magnetic flux 9x, 9y, 9v and 9w. This works so as to cancel the induced voltage and suppresses the occurrence of circulating current loss between the strands.

(Second Embodiment)
A second embodiment will be described with reference to FIG. FIG. 6 is a view of the end portion of the stator core as seen from the axial direction. This is similar to the embodiment of FIGS. 1 and 2, and includes the stator core 3 and the armature winding 2, and the coil end pitch a of the upper coil 2c is set to the coil end of the lower coil 2d. The only difference is that the pitch is shorter than the pitch b.

 Thus, in the second embodiment, the amount of interlinkage magnetic flux in the upper coil 2c is reduced by making the end pitch a of the upper coil 2c having a large interlinkage magnetic flux shorter than the end pitch b of the lower coil 2d. The occurrence of loss due to circulating current can be suppressed.

  On the other hand, in the conventional example of FIG. 11 described above, the end pitch a of the upper coil 2c and the end pitch b of the lower coil 2d are equal, and are connected at the ends of the equal distance between the embedded slots 6. ing. As a result, in the case of FIG. 11, the end magnetic flux incident on the end of the upper coil 2c is larger than the end magnetic flux incident on the end of the lower coil 2d, and the induced voltage is larger in the upper coil 2c than in the lower coil 2d. , Circulating current flows and loss increases.

  FIG. 7 is a view for explaining the second embodiment of the present invention, showing a view of the vicinity of the iron core end portion of the coil viewed from the inner diameter direction, and FIG. 8 showing a view taken in the direction of arrow A in FIG. Yes. In the end of the lower coil 2d that protrudes outward from both side surfaces of the stator core 3, the winding slot surface is a core end stage with the corners of the core end surface dropped in a plane perpendicular to the radial direction. 8 is formed. Further, the end portion of the core in which the corners of the winding slot surface and the end surface of the core are dropped in a plane perpendicular to the radial direction on the end portion of the bent side of the lower coil 2d protruding outward from both side surfaces of the stator core. A drop 3a is formed. 7 and 8, the upper coil 2c is bent leftward in the drawing and connected to the lower coil and the coil end, and the lower coil 2d is bent rightward and connected to the upper coil and the coil end.

 When the end pitch a of the upper coil 2c is made shorter than the end pitch b of the lower coil 2d as shown in FIG. 6, the inclination of bending the lower coil 2d is reduced, and the distance between the lower coil 2d and the outer spacing piece 8 of FIG. c, The distance d between the lower coil 2d and the end of the stator core 3 is reduced. Then, the possibility that the lower coil 2d comes into contact with the outer spacing piece 8 and the end of the stator core 3 increases, and the coil 2 may be damaged during assembly. Further, when the distance from the coil is reduced, eddy current loss generated at the outer spacing piece 8 and the end of the iron core is increased.

 Therefore, in the second embodiment, as shown in FIGS. 7 and 8, the stator core 3 facing the lower coil 2 d is formed with a circumferential core end paragraph 3 a, and at the corner of the outer spacing piece 8. A chamfered portion 8a is formed.

 With this configuration, the distance c is maintained between the lower coil 2d and the outer spacing piece 8, and the distance d is maintained between the lower coil 2d and the end of the stator core 3. Contact between the lower coil 2d and the outer spacing piece 8 and the lower coil 2d and the end of the stator core 3 can be prevented, and eddy current loss can also be reduced.

  In addition, also in the modified example of the second embodiment, as in FIGS. 4 and 5, the magnetic material space factor of the stator core 3 is expressed as the sub-core part, which is a diagram illustrating a modified example of the first embodiment. By making the modification 7 larger than the other stator core part, it works to cancel the induced voltage, and the generation of circulating current loss between the wires can be further suppressed.

BRIEF DESCRIPTION OF THE DRAWINGS In order to demonstrate 1st Embodiment of the stator of the rotary electric machine of this invention, the schematic sectional drawing which shows typically the flux linkage of a strand conductor. The schematic sectional drawing which expands and shows a part of FIG. The schematic sectional drawing which shows the stator of the rotary electric machine which shows the structure of FIG. 1 in detail. The schematic sectional drawing for demonstrating the modification 1 of 1st Embodiment of the stator of the rotary electric machine of this invention. The schematic sectional drawing for demonstrating the modification 2 of 1st Embodiment of the stator of the rotary electric machine of this invention. Schematic for demonstrating the relationship between a stator iron core, an upper coil, and a lower coil for describing 2nd Embodiment of the stator of the rotary electric machine of this invention. The figure which looked at the stator from the internal diameter direction in order to demonstrate 2nd Embodiment of the stator of the rotary electric machine of this invention. FIG. Sectional drawing of the armature winding of the stator of the conventional rotary electric machine, and the basic block diagram for demonstrating leakage magnetic flux. The fragmentary sectional view which cuts and shows the lower half part of the stator of the conventional rotary electric machine. The figure for demonstrating the relationship between the upper coil of an armature winding, and a lower coil seeing from the end surface of the axial direction of the stator of FIG.

Explanation of symbols

  2 ... armature winding, 2b ... coil end, 2c ... upper coil, 2d ... lower coil, 2e ... straight line part, 3 ... stator core, 3a ... core end stage, 4 ... ventilation duct, 5a. 5b ... strand conductor, 6 ... winding slot, 7 ... sub iron core part, 8 ... outer spacing piece, 8a ... chamfered part, 9a ... interlinkage magnetic flux, 9b ... interlinkage magnetic flux, 9v. 9w ... Interlinkage magnetic flux, 9x. 9y ... Interlinkage magnetic flux.

Claims (8)

Formed in a cylindrical shape as a whole, a plurality of winding slots extending in the axial direction on this inner peripheral surface are arranged side by side in the circumferential direction, and a plurality of ventilation ducts are arranged in parallel in the axial direction The stator core
A straight portion that is housed in the winding slot and bundles a large number of wire conductors to form a half turn coil of the upper coil and a half turn coil of the lower coil, and protrudes outward from both side surfaces of the stator core. Via an armature winding formed by short-circuiting the wire conductor for each half-turn coil of the upper coil and for each half-turn coil of the lower coil.
The strand conductors in the winding slots of the stator core and the strand conductors of the linear portion extending outward from both side surfaces of the stator core are continuously twisted and displaced. A stator of a rotating electric machine, wherein a dislocation angle in the whole half-turn coil is formed to be larger than 360 degrees.  The stator of the rotating electrical machine according to claim 1, wherein a dislocation angle at a linear portion of a coil end portion of the upper coil is larger than a dislocation angle at a linear portion existing at the coil end portion of the lower coil. Formed in a cylindrical shape as a whole, a plurality of winding slots extending in the axial direction on this inner peripheral surface are arranged side by side in the circumferential direction, and a plurality of ventilation ducts are arranged in parallel in the axial direction The stator core
A straight portion that is housed in the winding slot and bundles a large number of wire conductors to form a half turn coil of the upper coil and a half turn coil of the lower coil, and protrudes outward from both side surfaces of the stator core. Via an armature winding formed by short-circuiting the wire conductor for each half-turn coil of the upper coil and for each half-turn coil of the lower coil.
A stator for a rotating electric machine, wherein a coil end pitch of the upper coil is shorter than a coil end pitch of the lower coil.  A core end stage in which corners of the winding slot surface and the core end surface are dropped in a plane perpendicular to the radial direction at the end of the core of the lower coil that protrudes outward from both side surfaces of the stator core. The stator of the rotating electric machine according to claim 3, wherein a drop is formed.  5. The stator of a rotating electrical machine according to claim 3, wherein chamfering is performed on one corner portion of the outer space provided on the lower coil side that protrudes outward from both side surfaces of the stator core. 6.  The dislocation angle of the portion housed in the winding slot of the wire conductor is approximately 360 degrees, and an average magnetic material space factor in the axial center of the stator core is the axial direction. The stator for a rotating electrical machine according to any one of claims 1 to 5, wherein the stator has a magnetic space factor different from a portion different from a portion other than the substantially central portion.  A sub-core part having an average magnetic material space factor larger than those other than the substantially central part in the axial direction is provided in a range corresponding to a dislocation angle of 180 degrees at a substantially central part in the axial direction of the stator core. The stator for a rotating electric machine according to claim 6.  The dislocation angle of the wire conductor is within a range within 90 degrees from each end, and the average magnetic space factor of the stator core is smaller than the range within 90 degrees from each end. The stator for a rotating electric machine according to claim 6, wherein an iron core is provided.

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