JP2013021789A - Rotary electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary electric machine which can reduce eddy current loss in an armature core.SOLUTION: A rotary electric machine comprises: a rotor; a plurality of punched plate cores in which each of the punched plate cores is a fan-shaped punched plate, and the punched plate cores are annularly arranged around the rotor; a plurality of slots which are provided on an inner peripheral surface of the punched plate cores; a plurality of armature coils which are stored at multiple stages in a depth direction in the slots respectively, corresponding to one of a first current phase, a second current phase, and a third current phase; a tooth which is provided for each of the punched plate cores and is arranged between the armature coils; and a plurality of slits which are provided in the tooth located between the armature coils having different current phases and extend from the inner peripheral surface of the punched plate core to a radial direction.

Description

  Embodiments described herein relate generally to a rotating electrical machine such as a turbine generator.

  A general three-phase rotating electric machine such as a turbine generator includes a rotor and an armature (stator) provided outside the rotor via a gap. Generally, an electric element is composed of an armature core and an armature winding. The armature core is annularly arranged around the rotor. A plurality of slots are provided radially on the inner periphery of the armature core, and armature windings are arranged inside each slot. In addition, a tooth portion of the armature core is provided between the armature windings. Each armature winding corresponds to a current phase of any one of a U-phase current, a V-phase current, and a W-phase current. In Patent Document 1, a ventilation duct portion is not provided.

JP 2003-199267 A

  If the current phase is different between adjacent armature windings in the circumferential direction, the magnetic field is strengthened by the current flowing through the armature winding near the boundary (tooth portion of the armature core). Make a match. In particular, near the boundary where the current phase of the lower coil arranged on the bottom side of the slot is different, a large amount of end magnetic flux is incident due to the radial coil position. The temperature is higher than the different boundaries. For this reason, the end magnetic flux increased in this part of the armature core, resulting in a large eddy current loss, and the temperature at this position was locally high. When the temperature becomes high, the dielectric strength of the punched-sheet iron core and armature winding decreases, which may cause dielectric breakdown, damage to the core end face, and the like.

  An object of this invention is to provide the rotary electric machine which reduced the eddy current loss in an armature core.

  The rotating electrical machine of the embodiment includes a rotor, a plurality of punched-sheet iron cores, a plurality of slots, a tooth portion, and a plurality of slits. Each of the plurality of punched-sheet iron cores is arranged in a fan-like plate shape so as to form a ring around the rotor. The plurality of slots are provided on the inner peripheral surface of the punched-sheet iron core. The plurality of armature windings are housed in each of the slots in a two-stage stack in the depth direction, and 1 in any of the first current phase, the second current phase, and the third current phase. Corresponding to one. The tooth portion is provided on each of the punched-sheet iron cores and is provided at a position between the armature windings. The plurality of slits are provided in the tooth portions located between the armature windings having different current phases, and extend in the radial direction from the inner peripheral surface of the punched-sheet iron core.

Sectional drawing which cut | disconnected and showed the rotary electric machine concerning 1st Embodiment to the vertical direction. The cross-sectional schematic diagram which looked at the armature core of the armature (stator) of the rotary electric machine shown in FIG. 1 from the front direction. The cross-sectional schematic diagram which showed the modification of the armature core shown in FIG. Sectional drawing which cut | disconnected and showed the rotary electric machine concerning 2nd Embodiment to the vertical direction. The rotary electric machine concerning each embodiment WHEREIN: The graph which showed the axial direction magnetic flux density with respect to the axial direction distance from the edge part of an armature core. Sectional drawing which cut and showed the rotary electric machine concerning 3rd Embodiment to the vertical direction. The cross-sectional schematic diagram seen from the front direction of the armature core of the armature (stator) of the rotary electric machine concerning 4th Embodiment. Sectional drawing which showed the rotary electric machine concerning 5th Embodiment cut | disconnected in the vertical direction. The perspective view which showed the modification of the step part of the tooth | gear part of the armature core of the rotary electric machine shown in FIG. Sectional drawing which cut and showed the rotary electric machine concerning 6th Embodiment to the vertical direction. The cross-sectional schematic diagram seen from the front direction of the armature core of the armature (stator) of the rotary electric machine concerning 7th Embodiment.

  Hereinafter, an embodiment of a rotating electrical machine will be described with reference to FIGS. 1 and 2. In the present embodiment, a case where the present invention is applied to, for example, a turbine generator (hereinafter referred to as a generator) will be described as an example of a rotating electric machine (three-phase rotating electric machine).

  The generator 11 includes a rod-shaped rotor 12 and an armature 13 (stator) provided around the rotor 12 with a space therebetween.

  The rotor 12 includes a shaft 14, a field winding 15 wound around the shaft 14, and a holding ring 16 that covers the periphery of the field winding 15.

  The armature 13 has an armature core 21 (stator core) and an armature winding 22. The armature core 21 is formed by laminating a plurality of unit layer iron plates 23 in the axial direction A of the rotor 12, and the unit layer iron plate 23 is configured by arranging a plurality of fan-shaped punched plate cores 24 in an annular shape. (A part of the unit layer iron plate 23 is shown in FIG. 2). Each punched-plate iron core 24 is formed by punching an iron plate into a fan-shaped plate shape and insulating it by, for example, varnish processing. From another point of view, the punched-sheet iron core 24 is laminated in the axial direction A of the rotor 12 to constitute one block (iron core block) for every predetermined number. FIG. 1 shows that the fourth block 34 (fourth block) from the first block 31 (first block) is arranged in the axial direction A. In the present embodiment, four or more blocks are arranged in the axial direction.

  The armature 13 has rod-like spacing pieces 35 (spacers) at positions between the blocks 31-34. The end face of the block 31-34 and the spacing piece 35 constitute a cooling ventilation duct portion 36. For example, air or hydrogen for cooling is passed through the ventilation duct 36 to cool the armature core 21 and the like.

  The armature 13 includes a press plate 37 for fastening and fixing the armature core 21 (the punched plate core 24), an assembly bolt 38 (bolt), and a fastening nut 39 (nut). Further, the armature 13 has a wedge 40 for holding the armature winding 22 in the slot 45.

  As shown in FIG. 2, each punched plate iron core 24 includes a main body 43 (core back portion), a tooth portion 44 extending from the main body 43 toward the center of the generator 11, and an inner peripheral surface of the generator 11. A slot 45 having a large groove extending radially outward and a slit 46 having a narrow groove extending in the tooth portion 44 and extending radially from the inner peripheral surface of the tooth portion 44 toward the outside of the generator 11. Have. The tooth portions 44 are provided at positions between the slots 45, that is, between the armature windings 22. Further, in the present embodiment, the joint 47 between the adjacent punched-sheet iron cores 24 is positioned so as to overlap with the slot 45.

  The armature winding 22 is housed in the slot 45 and is provided in two stages in the depth direction of the slot 45. In FIG. 2, the armature windings 22 are respectively a U-phase armature coil 22A (corresponding to the first current phase), a V-phase armature coil 22B (corresponding to the second current phase), and a W-phase armature coil 22C. (Corresponding to the third current phase). U-phase current, V-phase current, and W-phase current flow through these armature windings 22 respectively. In the present embodiment, a plurality of (for example, two) slits 46 are provided in the tooth portion 44 positioned between the armature windings 22 having different current phases. In the present embodiment, not only the bottom side of the slot 45 but also a plurality of slits 46 are provided even when the current phase is different between the armature windings 22 on the side close to the opening of the slot 45 (exit side). (2) provided. Further, one slit 48 is provided in the tooth portion 44 located between the armature windings 22 having the same current phase. The slits 46 and 48 are formed by the first block 31 (first block), the second block 32 (second block), and the third block 33 (from the end 21A of the armature core 21). It is provided in all the punched-sheet iron cores 24 included in the third block).

  According to the first embodiment, the generator 11 includes a rotor 12 and a plurality of punched-sheet iron cores 24 each having a fan-shaped plate shape and arranged to form a ring around the rotor 12. , A plurality of slots 45 provided on the inner peripheral surface of the punched-sheet iron core 24, and the slots 45 are respectively housed in two layers in the depth direction, and the first current phase, the second current phase, And a plurality of armature windings 22 corresponding to one of the third current phases, and teeth provided at positions between the armature windings 22 and the punched iron core 24 And a plurality of slits 46 extending in the radial direction from the inner peripheral surface of the punched-sheet iron core 24 and provided in the tooth portion 44 positioned between the armature windings 22 having different current phases. .

  According to this configuration, the eddy current loop generated by the end magnetic flux including the magnetic flux M <b> 1 generated around the field winding 15 of the rotor 12 and the magnetic flux M <b> 2 generated from the end of the armature winding 22 is formed in the slit 46. 48, the equivalent electrical resistance to the eddy current is increased, and the eddy current can be reduced. As a result, local temperature rise of the punched-sheet core 24 can be prevented to prevent damage to the punched-sheet core 24, and power generation efficiency can be improved.

  Subsequently, a modification of the first embodiment will be described with reference to FIG. In this modification, a plurality of slits 46 are provided at positions between the armature windings 22 on the bottom side in the slot 45 and between the armature windings 22 having different current phases. On the other hand, only one slit 48 is provided between the armature windings 22 on the outlet side in the slot 45 even when the current phase is different. According to the present modification, the effect of reducing the eddy current loss is lower than that in the first embodiment, but the number of places where the slits 46 and 48 are added can be reduced. Thereby, in addition to a reduction in manufacturing cost, it is possible to suppress a decrease in rigidity of the armature core 21 (stator core), and to secure strength against stress and vibration.

  Next, a second embodiment of the rotating electrical machine will be described with reference to FIGS. The turbine generator 11 that is an example of the rotating electrical machine (three-phase rotating electrical machine) of the second embodiment is different from that of the first embodiment in that the number of punched cores 24 provided with slits 46 and 48 is different. However, other parts are common to the first embodiment. For this reason, a different part from 1st Embodiment is mainly demonstrated, a common code | symbol is attached | subjected about a common part, and description is abbreviate | omitted.

  In the second embodiment, the blank cores included in the first block 31 (first block) and the second block 32 (second block) from the end 21A in the axial direction A of the armature core 21. 24 is provided with a plurality of slits 46 and 48 having the same form as that of the first embodiment shown in FIG.

  Further, FIG. 5 shows a three-dimensional magnetic field analysis result of the axial magnetic flux density with respect to the axial distance from the end portion 21 </ b> A of the armature core 21 in the tooth portion 44. The vertical axis represents the axial magnetic flux density [PU], and the horizontal axis represents the axial distance from the end 21 </ b> A in the axial direction A of the armature core 21. As shown in FIG. 4, in the present embodiment, a paragraph 60 is provided near the end 21 </ b> A in the axial direction A of the armature core 21. The paragraph portion 60 is formed, for example, by gradually reducing the length of the tooth portion 44 of the punched iron core 24 in the direction of the end portion 21A.

  As shown in FIG. 5, the axial magnetic flux incident on the end portion of the punched iron core 24 decreases exponentially in the stacking direction, but the end magnetic flux ( M1 and M2) and the main magnetic flux emitted from the rotor 12 are increased in the axial magnetic flux density due to the influence of the fringing magnetic flux (M3, see FIG. 8) generated by gathering in the direction where the punched iron core 24 is present. It has been found that the axial magnetic flux density is high in the first block 31 and the second block 32 and generally low in the third block 33. The inventors who have found this fact are provided with a plurality of slits 46 having the same form as that of the first embodiment shown in FIG. 2 in all of the punched-sheet iron cores 24 included in the first block 31 and the second block 32. It was. The eddy current loss is proportional to the square of the magnetic flux density.

  According to the second embodiment, the plurality of armature cores 21 are stacked in the axial direction A of the rotor 12 to form one block with a predetermined number, and the plurality of blocks extend along the axial direction A. The plurality of slits 46 and 48 are a plurality of blank plates included in at least the first block 31 from the end portion 21A in the axial direction A and the second block 32 from the end portion 21A in the axial direction A. It is formed on each of the iron cores 24.

  According to this configuration, the manufacturing cost can be reduced by reducing the number of the punched-sheet cores 24 provided with the slits 46 and 48, and the slits 46 and 48 can be prevented from being provided more than necessary. The strength can be prevented from decreasing.

  Next, a third embodiment of the rotating electrical machine will be described with reference to FIG. The turbine generator 11 that is an example of the rotating electrical machine (three-phase rotating electrical machine) of the third embodiment is different from that of the second embodiment in that the number of the punched cores 24 provided with the slits 46 and 48 is different. However, other parts are common to the second embodiment. For this reason, a different part from 2nd Embodiment is mainly demonstrated, a common code | symbol is attached | subjected about a common part, and description is abbreviate | omitted.

  From the results of the three-dimensional magnetic field analysis shown in FIG. 5, the inventors have a high magnetic flux density in the half portion 32 </ b> A near the end in the second block 32 (second block) from the end 21 </ b> A of the armature core 21. It has been found that the magnetic flux density is lowered in the half portion opposite to the direction of the end portion. That is, in the second block 32 (second block), the axial magnetic flux density is attenuated to the same extent as the end face opposite to the end 21A of the first block 31 in the middle. The half portion 32A near the end corresponds to a range of 0.5L near the end, where L is the total axial length of each block 31-34 (FIG. 5). reference).

  Therefore, in the present embodiment, as shown in FIG. 6, each of the punched-sheet cores 24 included in the first block 31 (first block) from the end 21 </ b> A of the armature core 21, and the end A plurality of slits of the same form as the first embodiment shown in FIG. 2 are formed in each of the punched cores 24 included in the half part 32A near the end of the second block 32 (second block) from the part 21A. 46 and 48 are provided.

  According to the third embodiment, the manufacturing cost can be reduced by further reducing the number of the punched-sheet cores 24 provided with the slits 46 and 48, and the strength of the punched-sheet cores 24 is lowered more than necessary. Can be prevented.

  Next, a fourth embodiment of the rotating electrical machine will be described with reference to FIG. The turbine generator 11 as an example of the rotating electrical machine (three-phase rotating electrical machine) of the fourth embodiment is different from that of the first embodiment in that the structures of the slits 46 and 48 are different. Is common to the first embodiment. For this reason, a different part from 1st Embodiment is mainly demonstrated, a common code | symbol is attached | subjected about a common part, and description is abbreviate | omitted.

  As shown in FIG. 7, in the fourth embodiment, the first slit 51 is provided in the tooth portion 44 positioned between the armature windings 22 having different current phases. The first slit 51 has a narrow groove shape provided in the tooth portion 44 and extending radially from the inner peripheral surface of the tooth portion 44 toward the outside of the generator 11. The length (depth) of the first slit 51 is larger than the length (depth) of the slot 45. In the present embodiment, not only the armature winding 22 on the bottom side of the slot 45 but also the current phase differs between the armature windings 22 on the side close to the opening of the slot 45 (exit side). Also, a first slit 51 is provided.

  A second slit 52 is provided in the tooth portion 44 located between the armature windings 22 having the same current phase. The second slit 52 has a narrow groove shape that is provided in the tooth portion 44 and extends radially from the inner peripheral surface of the tooth portion 44 toward the outside of the generator 11. The length (depth) of the second slit 52 is equal to or smaller than the length (depth) of the slot 45.

  In 4th Embodiment, the 1st slit 51 and the 2nd slit 52 are the 1st block 31 (1st block) from the edge part 21A of the armature core 21, and the 2nd block 32 (1st block). 2 blocks) and all of the blank cores 24 included in the third block 33 (third block). In the present embodiment, the first slit 51 and the second slit 52 are provided in all the punched-sheet iron cores 24 included in the first block 31 to the third block 33. However, the second embodiment Similarly to the third embodiment, the first slit 51 and the second slit 52 may be provided only in the first block 31 and the second block 32.

  According to the fourth embodiment, the generator 11 includes a first slit 51 that extends deeper than the depth of the slot 45, and a second slit 52 that extends shallower than the depth of the slot 45. According to this configuration, the effect of reducing the eddy current loss is smaller than in the case where the number of slits 46 and 48 is plural, but the manufacturing cost increases due to the increase in the number of slits 46 and 48 and the punched iron core 24 is increased. It is possible to prevent a decrease in strength and to secure strength against stress and vibration.

  Next, a fifth embodiment of the rotating electrical machine will be described with reference to FIGS. The turbine generator 11 that is an example of the rotating electrical machine (three-phase rotating electrical machine) of the fifth embodiment is different from that of the first embodiment in that a stepped portion 61 is provided instead of the slits 46 and 48. However, other parts are common to the first embodiment. For this reason, a different part from 1st Embodiment is mainly demonstrated, a common code | symbol is attached | subjected about a common part, and description is abbreviate | omitted.

  In the fifth embodiment, a stepped portion 61 is provided at a position near the end of the second block 32 (second block) from the end 21 </ b> A of the armature core 21. In the present embodiment, the paragraph portion 61 is formed by gradually reducing the length of the tooth portion 44 of the punched-sheet iron core 24 in the direction toward the end portion 21A. The paragraph 61 is not limited to this shape. For example, as shown in FIG. 9, the width in the circumferential direction B of the tooth portion 44 of the punched-sheet iron core 24 is gradually increased in the direction toward the end 21A. It may be formed smaller.

  According to the present embodiment, the stepped portion 61 in which one of the length of the tooth portion 44 and the width in the circumferential direction of the tooth portion 44 of the plurality of punched-plate cores 24 is reduced from the end portion 21A in the axial direction A. It is provided at a position near the end of the second block 32. According to this configuration, the end magnetic flux (the magnetic flux M1 generated around the field winding 16 of the rotor and the electric machine) incident on the position near the end of the second block 32 (second block) from the end 21A. The eddy current is prevented by concentrating the magnetic flux M3 generated at the end of the child winding 22) and the fringing magnetic flux M3 (usually incident toward the vicinity of the ventilation duct) in one place. Loss and temperature rise can be prevented and power generation efficiency can be improved.

  Next, a sixth embodiment of the rotating electrical machine will be described with reference to FIG. Although the turbine generator 11 which is an example of the rotary electric machine (three-phase rotary electric machine) of 6th Embodiment differs from the thing of 5th Embodiment by the point in which the part which provides the part 61 is increased. The other parts are the same as in the fifth embodiment. For this reason, portions different from those of the fifth embodiment will be mainly described, and common portions will be denoted by common reference numerals and description thereof will be omitted.

  In the present embodiment, in addition to the paragraph portion (first paragraph portion 61) of the second block 32 (second block), the first block 31 (first portion from the end portion 21A of the armature core 21). One block) is provided with a paragraph portion (second paragraph portion 62) at a position on the opposite side to the end portion 21A. In the present embodiment, the stepped portion 62 is formed by gradually reducing the length of the tooth portion 44 of the punched-sheet iron core in the direction away from the end portion 21A. It should be noted that the stepped portion (second stepped portion 62) is not limited to this shape. For example, as shown in FIG. 9, the width in the circumferential direction B of the tooth portion 44 of the punched-sheet iron core 24 is set. The end portion 21A may be formed to be gradually smaller as it goes away from the end portion 21A.

  According to the present embodiment, the paragraphed portion in which either one of the length of the tooth portion 44 of the plurality of punched-plate iron cores 24 and the width of the tooth portion 44 in the circumferential direction B is reduced from the end portion 21A in the axial direction A The first block 31 is provided at a position on the opposite side to the end 21A. According to this configuration, the end magnetic fluxes M1 and M2 and the fringing magnetic flux M3 incident on the position closer to the side opposite to the end 21A of the first block 31 (first block) from the end 21A are in one place. Concentration can be prevented and power generation efficiency can be improved while preventing eddy current loss and temperature rise.

  Next, a seventh embodiment of the rotating electrical machine will be described with reference to FIG. The turbine generator 11 which is an example of the rotating electrical machine (three-phase rotating electrical machine) of the seventh embodiment is different from that of the first embodiment in the position of the boundary 71 between the punched-sheet iron cores 24. Other parts are common to the first embodiment. For this reason, a different part from 1st Embodiment is mainly demonstrated, a common code | symbol is attached | subjected about a common part, and description is abbreviate | omitted.

  In the present embodiment, the boundary 71 between the adjacent punched-sheet iron cores 24 is disposed not at the position where the slot 45 is located but at the position of the tooth portion 44. That is, in the present embodiment, a boundary 71 between the punched-sheet iron cores 24 is provided instead of the slit 46 in the tooth portion 44 positioned between the armature windings 22 having different current phases. In the present embodiment, the boundaries 71 of all the punched-sheet cores 24 included in the first block 31 to the third block 33 are arranged as described above, but the same as in the second and third embodiments. In addition, the boundary 71 of the punched iron core 24 may be arranged as described above only in the first block 31 and the second block 32.

  According to the present embodiment, the length for breaking the eddy current loop generated by the end magnetic fluxes M1 and M2 and the fringing magnetic flux M3 is increased, and the equivalent electrical resistance to the eddy current is increased. can do. For this reason, eddy current loss is reduced, and power generation efficiency can be improved while preventing a local temperature rise in the tooth portion 44.

  In addition, the rotating electrical machine can of course be variously modified without departing from the scope of the invention. Moreover, embodiment is an illustration and the range of invention is not limited to them. Furthermore, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine the component covering different embodiment suitably.

DESCRIPTION OF SYMBOLS 11 ... Generator, 12 ... Rotor, 21A ... End part, 22 ... Armature winding, 24 ... Blank core, 31 ... First block, 32 ... Second block, 32A ... Half part, 44 ... tooth part, 45 ... slot, 46 ... slit, 51 ... first slit, 52 ... second slit, 61 ... paragraphing part, 62 ... second paragraphing part, 71 ... boundary

Claims (8)

A rotor,
A plurality of punched iron cores each arranged in a ring shape around the rotor, each of which is a punched iron core having a fan-shaped plate shape,
A plurality of slots provided on the inner peripheral surface of the punched-sheet iron core;
A plurality of armatures accommodated in each of the slots in a plurality of stages in the depth direction and corresponding to one of the first current phase, the second current phase, and the third current phase. Windings,
While being provided on each of the punched-sheet iron cores, tooth portions provided at positions between the armature windings,
A plurality of slits extending in the radial direction from the inner peripheral surface of the punched-sheet iron core, provided on the tooth portion located between the armature windings having different current phases from each other;
With
The plurality of punched-sheet iron cores are stacked in the axial direction of the rotor to constitute one block with a predetermined number, and the plurality of blocks are arranged along the axial direction,
The plurality of slits are formed in each of the plurality of punched-sheet iron cores included in at least a first block from the axial end and a second block from the axial end. Rotating electric machine. A rotor,
A plurality of punched iron cores each arranged in a ring shape around the rotor, each of which is a punched iron core having a fan-shaped plate shape,
A plurality of slots provided on the inner peripheral surface of the punched-sheet iron core;
A plurality of armatures accommodated in each of the slots in a plurality of stages in the depth direction and corresponding to one of the first current phase, the second current phase, and the third current phase. Windings,
While being provided on each of the punched-sheet iron cores, tooth portions provided at positions between the armature windings,
The armature windings positioned on the bottom side in the slot and provided in the tooth portion positioned between the armature windings having different current phases, A plurality of slits extending radially from the circumferential surface;
With
The plurality of punched-sheet iron cores are stacked in the axial direction of the rotor to constitute one block with a predetermined number, and the plurality of blocks are arranged along the axial direction,
The plurality of slits are formed in each of the plurality of punched-sheet iron cores included in at least a first block from the axial end and a second block from the axial end. Rotating electric machine. A rotor,
A plurality of punched iron cores each arranged in a ring shape around the rotor, each of which is a punched iron core having a fan-shaped plate shape,
A plurality of slots provided on the inner peripheral surface of the punched-sheet iron core;
A plurality of armatures accommodated in each of the slots in a plurality of stages in the depth direction and corresponding to one of the first current phase, the second current phase, and the third current phase. Windings,
While being provided on each of the punched-sheet iron cores, tooth portions provided at positions between the armature windings,
A plurality of slits extending in the radial direction from the inner peripheral surface of the punched-sheet iron core, provided on the tooth portion located between the armature windings having different current phases from each other;
With
The plurality of punched-sheet iron cores are stacked in the axial direction of the rotor to constitute one block with a predetermined number, and the plurality of blocks are arranged along the axial direction,
The plurality of slits are at least near each of the plurality of punched-sheet cores included in the first block from the end in the axial direction and the end of the second block from the end in the axial direction. A rotating electrical machine formed on each of the plurality of punched-sheet iron cores included in the half. A rotor,
A plurality of punched iron cores each arranged in a ring shape around the rotor, each of which is a punched iron core having a fan-shaped plate shape,
A plurality of slots provided on the inner peripheral surface of the punched-sheet iron core;
A plurality of armatures accommodated in each of the slots in a plurality of stages in the depth direction and corresponding to one of the first current phase, the second current phase, and the third current phase. Windings,
While being provided on each of the punched-sheet iron cores, tooth portions provided at positions between the armature windings,
The armature windings positioned on the bottom side in the slot and provided in the tooth portion positioned between the armature windings having different current phases, A plurality of slits extending radially from the circumferential surface;
With
The plurality of punched-sheet iron cores are stacked in the axial direction of the rotor to constitute one block with a predetermined number, and the plurality of blocks are arranged along the axial direction,
The plurality of slits are at least near each of the plurality of punched-sheet cores included in the first block from the end in the axial direction and the end of the second block from the end in the axial direction. A rotating electrical machine formed on each of the plurality of punched-sheet iron cores included in the half. A rotor,
Each of which has a fan-shaped plate shape, and a plurality of punched-sheet iron cores arranged so as to form a ring around the rotor;
A plurality of slots provided on the inner peripheral surface of the punched-sheet iron core;
A plurality of armatures accommodated in each of the slots in a plurality of stages in the depth direction and corresponding to one of the first current phase, the second current phase, and the third current phase. Windings,
While being provided on each of the punched-sheet iron cores, tooth portions provided at positions between the armature windings,
Provided in the tooth portion located between the armature windings having different current phases, extending in a radial direction from an inner peripheral surface of the punched-sheet iron core, and extending deeper than a depth of the slot. Slits,
A second portion is provided in the tooth portion positioned between the armature windings having the same current phase, extends radially from an inner peripheral surface of the punched-sheet core, and extends shallower than a depth of the slot. Slits,
A rotating electric machine comprising: A rotor,
Each of which has a fan-shaped plate shape, and a plurality of punched-sheet iron cores arranged so as to form a ring around the rotor;
A plurality of slots provided on the inner peripheral surface of the punched-sheet iron core;
A plurality of armatures accommodated in each of the slots in a plurality of stages in the depth direction and corresponding to one of the first current phase, the second current phase, and the third current phase. Windings,
While being provided on each of the punched-sheet iron cores, tooth portions provided at positions between the armature windings,
With
The plurality of punched-sheet iron cores are stacked in the axial direction of the rotor to constitute one block with a predetermined number, and the plurality of blocks are arranged along the axial direction,
The end portion of the second block from the end portion in the axial direction is formed by reducing one of the length of the tooth portion and the circumferential width of the tooth portion of the plurality of punched-plate cores. A rotating electrical machine characterized in that it is provided at a position close to it. A rotor,
Each of which has a fan-shaped plate shape, and a plurality of punched-sheet iron cores arranged so as to form a ring around the rotor;
A plurality of slots provided on the inner peripheral surface of the punched-sheet iron core;
A plurality of armatures accommodated in each of the slots in a plurality of stages in the depth direction and corresponding to one of the first current phase, the second current phase, and the third current phase. Windings,
While being provided on each of the punched-sheet iron cores, tooth portions provided at positions between the armature windings,
With
The plurality of punched-sheet iron cores are stacked in the axial direction of the rotor to constitute one block with a predetermined number, and the plurality of blocks are arranged along the axial direction,
The end portion of the first block from the end portion in the axial direction is formed by reducing one of the length of the tooth portion and the circumferential width of the tooth portion of the plurality of punched-sheet iron cores. A rotating electric machine characterized by being provided at a position close to the opposite side. A rotor,
Each of which has a fan-shaped plate shape, and a plurality of punched-sheet iron cores arranged so as to form a ring around the rotor;
A plurality of slots provided on the inner peripheral surface of the punched-sheet iron core;
A plurality of armatures accommodated in each of the slots in a plurality of stages in the depth direction and corresponding to one of the first current phase, the second current phase, and the third current phase. Windings,
While being provided on each of the punched-sheet iron cores, tooth portions provided at positions between the armature windings,
With
A rotating electric machine characterized in that a boundary between adjacent punched-sheet iron cores is provided in the tooth portion positioned between the armature windings having mutually different current phases.

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