JP2015201967A - Stator core of dynamo-electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the stator core of a dynamo-electric machine capable of reducing eddy current loss, by shortening a current path occurring at the contact of adjoining split cores.SOLUTION: In a stator core 20 where a plurality of split cores 24 are arranged annularly, an insulating portion is formed in the split core 24, by sandwiching an insulating paper 23 between a plurality of magnetic steel sheets 22 laminated in the axial direction, or laminating other magnetic steel sheet 22c, having a smaller width in the circumferential direction compared with other magnetic steel sheet 22c, on a part of the laminated magnetic steel sheets 22.

Description

  The present invention relates to a stator core of a rotating electrical machine.

  Conventionally, vehicles equipped with a rotating electric machine as a power source for electric vehicles and hybrid vehicles have been developed. As a stator incorporated in a rotating electric machine, a stator including a stator core in which a plurality of divided cores are arranged in an annular shape and a stator coil wound around the divided cores via an insulator surrounding the divided cores is known. Yes. Patent Document 1 discloses a hybrid vehicle drive device that includes a rotating electrical machine having such a split stator as a drive source.

Japanese Patent No. 3666727

  As shown schematically in FIG. 10, a conventional stator 100 of a rotating electrical machine is configured by a plurality of divided cores 101 arranged in an annular shape with their stator yokes in contact with each other. The split core 101 has an insulating coating 102 on its surface, and a plurality of pressed electromagnetic steel plates 103 are laminated. For this reason, the lamination direction of the electromagnetic steel sheets 103 is insulated by the insulating coating 102, but the side surface 103a of the electromagnetic steel sheet 103 that has been punched out has no insulating coating 102 and is in a conductive state. Therefore, when the divided cores 101 are arranged in an annular shape, if the adjacent divided cores 101 are displaced in the rotation axis direction beyond the thickness t of the insulating coating 102, the electromagnetic waves shifted in the rotation axis direction in the adjacent divided cores 101. The side surfaces 103a of the steel plates 103 are in contact with each other. As a result, the side surfaces 103a of the electromagnetic steel sheet 103 are electrically connected to each other, and a current path 105 is formed. Thus, eddy current may be generated when the rotating electrical machine is energized, resulting in eddy current loss.

  The objective of this invention is providing the stator core of the rotary electric machine which shortens the electric current path | route which generate | occur | produces in the contact part of adjacent division | segmentation cores, and can reduce an eddy current loss.

In order to achieve the above object, the invention described in claim 1
Each of a plurality of divided cores (for example, divided cores 24 in the embodiments described later) separately formed by laminating a plurality of steel plates (for example, electromagnetic steel plates 22 in the embodiments described later) in the rotation axis direction. In a stator core of a rotating electric machine configured by arranging in an annular shape (for example, a stator core 20 in an embodiment described later),
In the abutment portion (for example, abutment portion 25 in the embodiment described later) where the segment cores adjacent to each other in the circumferential direction abut on the split core, the insulation of the steel plate is partly in the rotation axis direction. An insulating part (for example, insulating paper 23 and gap S in the embodiment described later) is formed separately from the coating (for example, the insulation coating 28 in the embodiment described later).

The invention according to claim 2 is the invention according to claim 1,
An axial position where the insulating portion is formed in the predetermined divided core is different from an axial position where the insulating portion is formed in the divided core adjacent to the predetermined divided core.

In the invention according to claim 3, in the invention according to claim 2,
The axial position in which the insulating portion is formed in the divided core adjacent to one circumferential direction of the predetermined divided core is compared with the axial position in which the insulating portion is formed in the predetermined divided core. Is located on one end face side in the axial direction of
The axial position where the insulating portion is formed in the divided core adjacent to the other circumferential side of the predetermined divided core is more in comparison with the axial position where the insulating portion is formed in the predetermined divided core. Is located on the other end face side in the axial direction.

The invention according to claim 4 is the invention according to claim 1,
A split core (for example, a split core 24 in an embodiment described later) on which the insulating portion is formed and a split core (for example, a split core 24a in an embodiment described later) on which the insulating portion is not formed. It is arranged to be adjacent in the direction.

Moreover, in invention of Claim 5, in invention of any one of Claims 1-4,
The insulating part is configured by laminating an insulator (for example, insulating paper 23 in an embodiment described later) between the laminated steel plates.

The invention according to claim 6 is the invention according to claim 5,
An axial thickness of the insulator (for example, an axial thickness T1 in an embodiment described later) is thicker than an axial thickness of the steel sheet (for example, an axial thickness T2 in an embodiment described later).

Moreover, in invention of Claim 7, in invention of any one of Claims 1-4,
The insulating portion is formed on a part of the laminated steel plates, and the width in the circumferential direction at the contact portion (for example, the width W of the yoke portion 22a in an embodiment described later) is smaller than the other steel plates. Another steel plate (for example, an electromagnetic steel plate 22c in an embodiment described later) is sandwiched and laminated.

  According to the first aspect of the present invention, by arranging the split core formed with the insulating portion, the current path generated at the contact portion between the adjacent split cores can be blocked at the position of the insulating portion. Therefore, eddy current loss can be reduced by shortening the axial current path.

  According to the invention described in claim 2, the axial position where the insulating portion is formed in the predetermined divided core is different from the axial position where the insulating portion is formed in the divided core adjacent to the predetermined divided core. As a result, it is possible to effectively shorten the current path generated at the contact portion between the adjacent divided cores, so that eddy current loss can be effectively reduced.

  According to the invention described in claim 3, since the current path generated at the contact portion between the adjacent divided cores can be further effectively shortened, the eddy current loss can be effectively reduced.

  According to the fourth aspect of the invention, the split core formed with the insulating portion is disposed adjacent to the split core where the insulating portion is not formed, thereby generating at the contact portion between the adjacent split cores. Since the current path can be interrupted at the position of the insulating portion, eddy current loss can be reduced by shortening the current path in the axial direction. Moreover, the number of the split cores in which the insulating portions are formed can be reduced.

  According to the fifth aspect of the present invention, the insulating portion can be easily formed at the contact portion by sandwiching the insulator.

  According to the sixth aspect of the present invention, since the axial thickness of the insulator is thicker than the axial thickness of the steel sheet, the current path generated at the contact portion between the adjacent divided cores is ensured at the position of the insulator. Can be blocked.

  According to the seventh aspect of the present invention, it is possible to suppress a decrease in the volume of the portion that becomes the magnetic path of the stator core, compared with the case where the insulator is sandwiched between the electromagnetic steel plates. The decrease can be suppressed.

It is a top view of the stator of the rotary electric machine of 1st Embodiment of this invention. It is a perspective view of the stator piece of FIG. It is a disassembled perspective view of the split core and insulator of FIG. It is a principal part side view of a stator core. FIG. 5 is a schematic diagram showing an enlarged position of an insulating portion of the stator core shown in FIG. 4. (A) is a principal part side view of the stator core of 2nd Embodiment, (b) is a schematic diagram which expands and shows the position of an insulation part. (A) is a principal part side view of the stator core of 3rd Embodiment, (b) is a schematic diagram which expands and shows the position of an insulation part. (A) is a front view of the steel plate which comprises the split core of 4th Embodiment, (b) is a schematic diagram which expands and shows the position of an insulation part. It is a schematic diagram which expands and shows the thickness of the laminated | stacked insulator compared with the thickness of the steel plate. It is a principal part side view of the conventional split core.

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

(First embodiment)
FIG. 1 is a plan view of a stator 10 of the rotating electrical machine according to the first embodiment. The stator 10 constitutes a rotating electric machine in combination with a rotor (not shown) provided therein, and is used as, for example, an electric motor or a generator.

  The stator 10 is a so-called three-phase Y-type salient-pole stator, and as shown in FIG. 1, a hollow holder 12 and three-phase input terminals U, V, W provided on the holder 12 A neutral terminal N that forms a neutral point, and an annular stator group 16 that is formed by annularly arranging a plurality (18 in FIG. 1) of stator pieces 14 along the inner peripheral surface 12a of the holder 12. I have.

  The annular stator group 16 includes six stator pieces 14 each having U-phase, V-phase, and W-phase coils 18. In this case, in the annular stator group 16, the plurality of stator pieces 14 are arranged in an annular shape, whereby a U phase (U1 phase to U6 phase), a V phase (V1 phase to V6 phase), and a W phase (W1 phase to W1 phase). The coils 18 of (W6 phase) are arranged in the order of U1, V1, W1, U2,..., U6, V6, W6 in the clockwise direction of FIG. In other words, the annular stator group 16 is wound around each of the divided cores 24 of the stator core 20 via the stator core 20 in which a plurality of (18 in FIG. 1) divided cores 24 to be described later are arranged in an annular shape and the insulator 26. A coil 18 around which a wire 18a is wound.

  Next, among the stator pieces 14 having the coils 18 of the U1 phase to U6 phase, the V1 phase to V6 phase, and the W1 phase to W6 phase, the configuration of one stator piece 14 will be described representatively. In addition, the structure of the stator piece 14 demonstrated here is a structure common to the stator piece 14 of all the phases.

  As shown in FIGS. 2 and 3, the stator piece 14 is configured by laminating a plurality of substantially T-shaped electromagnetic steel plates 22 (see FIG. 5) punched out by pressing in the rotation axis direction (arrow A direction). The split core 24, the insulator 26 that electrically insulates the split core 24, and the coil 18 that includes the winding 18 a that is wound around the split core 24 via the insulator 26. The winding 18a is a rectangular wire having a rectangular cross section.

  The electromagnetic steel plates 22 constituting the substantially T-shaped split core 24 are laminated from a yoke portion 22a extending along the circumferential direction (arrow C direction) on the outer diameter side (arrow B1 direction), and the yoke portion 22a. And a magnetic pole portion 22b extending toward the inner diameter side (arrow B2 direction). Further, a substantially semicircular fitting recess 32 is formed at the end of the yoke portion 22a in the direction of arrow C2, and an end of the yoke portion 22a in the direction of arrow C1 is substantially half corresponding to the fitting recess 32. A circular fitting convex portion 34 is formed. When the plurality of divided cores 24 are arranged in an annular shape to form the stator core 20, the fitting concave portions 32 and the fitting convex portions 34 of the yoke portion 22 a are fitted to each other to position each divided core 24.

  The insulator 26 is made of an electrically insulating material such as a flexible resin. The insulator 26 is wound around the winding portion 38 around which the winding 18a is wound, and protrudes from the winding portion 38 in the arrow B1 direction, and the lead wire (starting end portion or terminal end portion) of the winding 18a is routed along the arrow C direction. And a guide unit 40 for guiding the user.

  The winding portion 38 includes a first winding portion 38a and a second winding portion 38b that can be fitted to each other in the arrow A direction.

  The first winding portion 38a is a first winding portion main body 42a formed in a substantially U-shaped cross section, and a first erected on the inner diameter side (arrow B2 direction) end of the first winding portion main body 42a. It has an inner peripheral wall 44a and a first outer peripheral wall 46a erected on the end in the arrow B1 direction of the first winding portion main body 42a so as to face the first inner peripheral wall 44a.

  The second winding portion 38b has a second winding portion main body 42b formed in a substantially U-shaped cross section so as to face the first winding portion main body 42a and a second winding portion 38b so as to face the first inner peripheral wall 44a. A second inner peripheral wall 44b erected at the end in the arrow B2 direction of the winding part main body 42b, and an erection at the end in the arrow B1 direction of the second winding part main body 42b so as to face the second inner peripheral wall 44b. And a second outer peripheral wall 46b.

  And the 1st winding part 38a and the 2nd winding part 38b are integrated by fitting the 1st winding part 38a and the 2nd winding part 38b so that the magnetic pole part 22b of the split core 24 may be inserted | pinched. Thus, a winding portion 38 is formed, and a hole 48 is formed in the central portion of the winding portion 38 along the arrow B direction. Thereby, while the magnetic pole part 22b fits in the hole 48, the location between the 1st inner peripheral wall 44a and the 2nd inner peripheral wall 44b in the winding part 38, and the 1st outer peripheral wall 46a and the 2nd outer peripheral wall 46b. The coil 18 is formed by winding the winding 18a around the coil 18a.

  On the other hand, the guide part 40 is provided so as to protrude in the arrow B1 direction from the vicinity of the upper end part of the first outer peripheral wall 46a.

  The guide portion 40 is formed on the plate-like member 50 and the plate-like member 50, and is substantially U-shaped in the plan view of FIG. 1, and behind the lead wire containing portion 52 (on the back in the direction of arrow B2). And an end fixing portion 54 for fixing the end portion of the winding 18a wound around the winding portion 38.

  The conducting wire accommodating portion 52 extends along the arrow C direction, and conducting wire end holding grooves 56, 58, 60, 62 that can accommodate the lead wire of the winding 18a are predetermined in the rotation axis direction (arrow A direction). It is provided at intervals. In the conducting wire accommodating portion 52, the starting end portion or the terminating end portion of the winding 18a is drawn in the direction of arrow C with the long side of the rectangular wire extending in the direction of arrow A, and each conducting wire end holding groove 56, 58, 60, 62.

  The conducting wire end holding groove 56 accommodates the starting end or the terminating end of the windings 18a of all phases and constitutes an accommodating portion that is routed in the circumferential direction. The conducting wire end holding grooves 58, 60, 62 are While accommodating the starting end part or terminal part of the winding 18a of each phase, the accommodating part drawn around in the circumferential direction is each comprised.

  A plurality (18 in the embodiment shown in FIG. 1) of the stator pieces 14 having such a configuration is formed by fitting the fitting protrusions 34 formed at the end of the yoke portion 22a into the fitting depressions of the adjacent divided cores 24. The stator core 20 is configured by engaging with 32 and arranging in an annular shape.

  Further, in each of the divided cores 24 constituting the stator core 20, as shown in FIGS. 4 and 5, an insulating paper 23 is sandwiched between a plurality of laminated magnetic steel sheets 22 at a substantially axial intermediate position. The insulating paper 23 is an insulating material different from the insulating coating 28 of the electromagnetic steel sheet 22, and electrically insulates between the electromagnetic steel sheets 22 laminated adjacent to the insulating paper 23. In this way, by sandwiching the insulating paper 23 between the laminated electromagnetic steel sheets 22, the insulating region P where the insulating paper 23 abuts on the abutting portion 25 where the circumferentially adjacent divided cores 24 abut each other is formed. It is formed.

  Therefore, even when the adjacent split cores 24 are arranged so as to be shifted in the rotation axis direction (vertical direction in FIG. 5) and the side surfaces of the electromagnetic steel sheet 22 shifted in the axial direction are electrically connected to each other, the current path 27 is formed. The current path 27 is blocked by the position of the insulating paper 23, that is, the insulating region P where the insulating papers 23 abut each other. That is, the current path 27 can be divided and shortened at the position of the insulating paper 23, thereby reducing loss due to eddy current.

  As described above, according to the stator core 20 according to the present embodiment, the plurality of divided cores 24 formed by laminating the plurality of electromagnetic steel plates 22 in the rotation axis direction include the divided cores 24 adjacent in the circumferential direction. In the abutment portion 25 where the abutment portion abuts, an insulating portion made of the insulating paper 23 is formed in a part of the axial direction, so that the current path 27 generated in the abutment portion 25 between the adjacent divided cores 24 is It can be cut off at the position of the insulating paper 23, and the eddy current loss can be reduced by shortening the current path 27 in the axial direction.

  Further, since the insulating portion is configured by sandwiching and laminating insulating paper 23 between the laminated electromagnetic steel plates 22, the insulating portion can be easily formed at the contact portion 25.

(Second Embodiment)
Then, the stator core 20 of 2nd Embodiment of this invention is demonstrated.
FIG. 6A is a side view of the main part of the stator core according to the second embodiment, and FIG. 6B is a schematic view showing the position of the insulating part in an enlarged manner. The stator core 20 of this embodiment includes a split core 24 in which an insulating paper 23 is sandwiched between a plurality of laminated electromagnetic steel sheets 22 and a split core 24a having a structure without the insulating paper 23 described in the first embodiment. Are alternately arranged in the circumferential direction and arranged in an annular shape.

  In the stator core 20 of the present embodiment, the divided core 24 having the insulating paper 23 and the divided core 24a not having the insulating paper 23 are arranged adjacent to each other in the circumferential direction, so that the divided cores adjacent in the circumferential direction are arranged. An insulating region P where the insulating paper 23 and the insulating coating 28 abut is formed in the abutting portion 25 where the 24 abut each other.

Therefore, according to the stator core 20 of the present embodiment, even when the split core 24 having the insulating paper 23 and the split core 24a not having the insulating paper 23 are arranged adjacent to each other in the circumferential direction, the adjacent splits are arranged. Since the current path 27 generated in the contact portion 25 between the cores 24 and 24a can be blocked by the position of the insulating paper 23, that is, the insulating region P where the insulating paper 23 and the insulating coating 28 contact each other, the axial direction By shortening the current path 27, eddy current loss can be reduced.
About another structure and effect | action, it is the same as that of the stator core 20 of 1st Embodiment. Further, according to the stator core 20 of the present embodiment, the number of the split cores 24 sandwiching the insulating paper 23 can be reduced as compared with the stator core 20 of the first embodiment.

(Third embodiment)
Then, the stator core 20 of 3rd Embodiment of this invention is demonstrated.
Fig.7 (a) is a principal part side view of the stator core of 3rd Embodiment, FIG.7 (b) is a schematic diagram which expands and shows the position of an insulation part. In the split cores 24 constituting the stator core 20 of the present embodiment, the axial positions of the insulating paper 23 sandwiched between the plurality of electromagnetic steel plates 22 are different from each other in the adjacent split cores 24.

  In this embodiment, the axial position of the insulating paper 23 in each divided core 24 is the axial position of the insulating paper 23 of the divided cores 24b1 and 24b2 adjacent to both sides in the circumferential direction with respect to the predetermined divided core 24b. The insulating paper 23 of 24b is located on the opposite side in the axial direction with respect to the axial position.

  That is, the axial position of the insulating paper 23 of the divided core 24b1 adjacent to one circumferential direction of the predetermined divided core 24b is one axial direction of the stator core 20 compared to the axial position of the insulating paper 23 of the predetermined divided core 24b. The axial position of the insulating paper 23 of the divided core 24b2 that is located on the end surface side in the direction of the arrow A1 and is adjacent to the other circumferential side of the predetermined divided core 24b is the axial position of the insulating paper 23 of the predetermined divided core 24b. Compared to the end face side of the other axial direction (arrow A2 direction) of the stator core 20.

  Therefore, in the abutting portion 25 where the predetermined divided core 24b and the divided core 24b1 adjacent to one circumferential direction of the divided core 24b abut, the insulating paper is placed on the end surface side in one axial direction (arrow A1 direction) of the stator core 20. An insulating region P <b> 1 where the contact 23 and the insulating coating 28 abut is formed. In addition, in the abutting portion 25 where the predetermined divided core 24b and the divided core 24b2 adjacent to the other circumferential side of the divided core 24b abut, an insulating paper is provided on the end surface side in the other axial direction (arrow A2 direction) of the stator core 20. An insulating region P <b> 2 where the contact 23 and the insulating coating 28 abut is formed.

As described above, according to the stator core 20 according to this embodiment, the axial position of the insulating paper 23 of the divided core 24b1 adjacent to one circumferential direction of the predetermined divided core 24b is the insulating paper of the predetermined divided core 24b. The axial position of the insulating paper 23 of the divided core 24b2 located on the end surface side of one axial direction (arrow A1 direction) of the stator core 20 and adjacent to the other circumferential direction other side of the predetermined divided core 24b as compared with the axial position of 23. Is located on the end face side in the other axial direction (arrow A2 direction) of the stator core 20 as compared to the axial position of the insulating paper 23 of the predetermined divided core 24b, so that the adjacent divided cores 24b, 24b1, 24b2 are adjacent to each other. The current path 27 generated in the contact portion 25 can be interrupted by the position of the insulating paper 23, that is, the insulating regions P1 and P2 where the insulating paper 23 and the insulating coating 28 contact each other. Because, since the axial direction of the current path 27 can be more effectively shortened, it is possible to effectively reduce the eddy current loss.
About another structure and effect | action, it is the same as that of the stator core 20 of 1st Embodiment.

(Fourth embodiment)
Next, the stator core 20 according to the fourth embodiment of the present invention will be described.
Fig.8 (a) is a front view of the steel plate which comprises the division | segmentation core of 4th Embodiment, FIG.8 (b) is a schematic diagram which expands and shows the position of an insulation part. In the split core 24c of this embodiment, an electromagnetic steel plate (another electromagnetic steel plate) 22c having a small width W of the yoke portion 22a is sandwiched and laminated between the laminated electromagnetic steel plates 22. The electromagnetic steel plate 22c having a small width W of the yoke portion 22a is easily manufactured by deleting both circumferential ends of the yoke portion 22a of the normal electromagnetic steel plate 22 by press working or the like.

  When the divided cores 24c are arranged in an annular shape as shown in FIG. 8B by sandwiching and laminating the electromagnetic steel plates 22c having the narrow width W of the yoke portion 22a between the plurality of electromagnetic steel plates 22, the electromagnetic steel plates A gap S that functions as an insulating portion is formed between the yoke portion 22a of 22c and the adjacent divided core 24.

  In the stator core 20 of the present embodiment, the split cores 24c having the magnetic steel plates 22c having the narrow width W of the yoke portion 22a are arranged adjacent to each other in the circumferential direction, so that the split cores 24 adjacent in the circumferential direction abut against each other. The insulating region P is formed in the portion 25 by the insulating region P where the gaps S abut or by the gap S and the insulating coating 28.

  Therefore, according to the stator core 20 according to the present embodiment, another electromagnetic steel plate 22c having a small width W of the yoke portion 22a is sandwiched and laminated on a part of the laminated electromagnetic steel plates 22, so that the insulating portion Since a gap S is formed, the current path 27 generated at the contact portion 25 between the adjacent divided cores 24c can be blocked at the position of the gap S, and the current path 27 in the axial direction can be shortened. Eddy current loss can be reduced.

Furthermore, compared to the case where the insulating paper 23 is sandwiched between the electromagnetic steel plates 22, it is possible to suppress a decrease in volume of a portion that becomes a magnetic path of the stator core 20, and thus it is possible to suppress a decrease in torque due to the provision of the insulating portion. it can.
About another structure and effect | action, it is the same as that of the stator core 20 of 1st Embodiment.

In the present embodiment, the split cores 24c sandwiched between the magnetic steel plates 22c having the small width W of the yoke portions 22a and the split cores 24a having a structure not including the magnetic steel plates 22c are alternately arranged in the circumferential direction. Even so, the same effects as in the second embodiment can be obtained.
Furthermore, even if the axial positions of the electromagnetic steel plates 22c to be laminated are arranged at different positions in the adjacent divided cores 24c, the same effect as in the third embodiment can be obtained.

  In addition, this invention is not limited to each embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably.

  In addition, as shown in the first to third embodiments, when the insulating portion is configured by sandwiching and laminating the insulating paper 23 between the laminated electromagnetic steel plates 22, the axial direction of the insulating paper 23 The thickness T1 is preferably set to be thicker than the axial thickness T2 of the electromagnetic steel plate 22, as shown in FIG. As shown in FIG. 9A, when the axial thickness T1 of the insulating paper 23 is thinner than the axial thickness T2 of the electromagnetic steel sheet 22, the split cores 24 and 24a are displaced in the rotation axis direction, and the axis of the insulating paper 23 When all the directional thicknesses T1 are included in the range of the axial thickness T2 of the electromagnetic steel sheet 22, the entire length of the plurality of electromagnetic steel sheets 22 on which the current paths 27 are stacked so as to bypass the insulating paper 23. As a result, overcurrent loss may increase.

On the other hand, when the axial thickness T1 of the insulating paper 23 is thicker than the axial thickness T2 of the electromagnetic steel sheet 22, as shown in FIG. 9B, the amount of deviation in the rotational axis direction of the split cores 24 and 24a is increased. Regardless, the side surfaces of the electromagnetic steel sheets 22 do not contact each other in the adjacent divided cores 24 and 24a, and the current path 27 generated in the contact portion 25 between the adjacent divided cores 24 and 24a It can be reliably shut off at the position.
In the fourth embodiment, when the axial thicknesses of the electromagnetic steel plate 22 and the electromagnetic steel plate 22c are made different, the axial thickness of the electromagnetic steel plate 22c having a small width W of the yoke portion 22a is equal to the axial thickness of the electromagnetic steel plate 22. It is preferable to set it thicker.

DESCRIPTION OF SYMBOLS 10 Stator 14 Stator piece 18 Coil 20 Stator core 22 Magnetic steel plate (steel plate)
22c Magnetic steel sheet (other steel sheets)
23 Insulating paper (insulating part, insulator)
24, 24a, 24b, 24c Split core 25 Abutting portion 27 Current path 28 Insulation coating S Air gap (insulating portion)
T1 Axial thickness of insulator T2 Axial thickness of steel plate W Width of yoke part (circumferential width in contact part)

Claims (7)

A stator core of a rotating electrical machine constituted by arranging a plurality of divided cores, each of which is formed by laminating a plurality of steel plates in the rotation axis direction, in an annular shape,
In the contact portion where the split cores adjacent to each other in the circumferential direction contact each other in the split core, an insulating portion separate from the insulating coating of the steel plate is formed in a part of the rotating shaft direction. Stator core for rotating electrical machines. A stator core for a rotating electrical machine according to claim 1,
A stator core of a rotating electrical machine, wherein an axial position where the insulating portion is formed in the predetermined divided core and an axial position where the insulating portion is formed in a divided core adjacent to the predetermined divided core are different. A stator core for a rotating electrical machine according to claim 2,
The axial position in which the insulating portion is formed in the divided core adjacent to one circumferential direction of the predetermined divided core is compared with the axial position in which the insulating portion is formed in the predetermined divided core. Is located on one end face side in the axial direction of
The axial position where the insulating portion is formed in the divided core adjacent to the other circumferential side of the predetermined divided core is more in comparison with the axial position where the insulating portion is formed in the predetermined divided core. A stator core of a rotating electrical machine that is located on the other end face side in the axial direction of the rotating electric machine. A stator core for a rotating electrical machine according to claim 1,
A stator core for a rotating electrical machine, wherein a split core in which the insulating portion is formed and a split core in which the insulating portion is not formed are arranged adjacent to each other in the circumferential direction. A stator core for a rotating electrical machine according to any one of claims 1 to 4,
The insulating part is a stator core of a rotating electrical machine configured by stacking an insulating body sandwiched between the stacked steel plates. A stator core for a rotating electrical machine according to claim 5,
The stator core of a rotating electrical machine, wherein an axial thickness of the insulator is thicker than an axial thickness of the steel plate. A stator core for a rotating electrical machine according to any one of claims 1 to 4,
The insulating portion is configured by laminating another steel plate having a smaller width in the circumferential direction at the abutting portion than the other steel plates on a part of the laminated steel plates. , Stator core of rotating electrical machines.

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