JP2008245489A - Stator for electrical rotating machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stator for an electrical rotating machine that enables reduction in the height of coil ends. <P>SOLUTION: Slot conductors 32, 42, and 52, installed in circumferentially-different slots 14 of a stator core 12, of segment conductors 30, 40, and 50 are connected by turn parts 34, 44, and 54. Each slot 14 is installed with six slot conductors in a row, starting from a first layer on the radial inside toward a sixth layer on the radial outside. A slot conductor 32 is installed in a first layer and in a third layer, respectively in the segment conductor 30. A slot conductor 42 is installed in a fourth layer and in a sixth layer, respectively in the segment conductor 40. A slot conductor 52 is installed in a second layer and in a fifth layer, respectively in the segment conductor 50. Each gap 300, 302, and 304 is, respectively formed between the segment conductors 30 circumferentially adjacent to each other, between the segment conductors 40 circumferentially adjacent to each other, and between the segment conductors 50 circumferentially adjacent to each other. The segment conductor 50 is installed in the gaps 300, 302, respectively. The segment conductors 30, 40 are installed in the gap 304. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

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

  As a rotating electrical machine that doubles as an electric motor and a generator or is used exclusively as an electric motor or a generator, those disclosed in Patent Documents 1 and 2 are known. In both Patent Documents 1 and 2, a so-called segment conductor (SC) is installed in a slot of a fixed core, and the open ends of the segment conductor are electrically connected to form a stator winding. The segment conductor is formed by a slot conductor installed in each slot of the fixed core and a turn portion that electrically connects the slot conductors.

In such a rotating electrical machine, the number of slot conductors of the segment conductors installed in each slot of the fixed core and the number of slots of each phase per pole of the rotor of the rotating electrical machine are increased according to the required performance. In addition, the number of slot conductors of each phase per pole may be increased.
However, in the arrangement of the segment conductors in Patent Documents 1 and 2, when six slot conductors are accommodated in each slot, the turn portions of the other segment conductors are installed on the outer peripheral side of the turn portions of the inner peripheral segment conductors. Therefore, the turn portion of the stator winding protruding from the axial end surface of the fixed core (hereinafter, the turn portion of the stator winding protruding from the axial end surface of the fixed core is also referred to as “coil end”. There is a problem that the height of.

Japanese Patent No. 3303773 Japanese Patent No. 3384337

  The present invention has been made to solve the above problem, and an object of the present invention is to provide a stator of a rotating electrical machine that reduces the height of a coil end.

  According to the first to sixth aspects of the present invention, if the number of slot conductors arranged in a row in the radial direction in each slot of the fixed core is Nc, 6 ≦ Nc, and two slots having different positions in the circumferential direction The three segment conductors in which the slot conductors are installed in each of the two slot conductors are divided into k (1 ≦ k ≦ Nc−5, and can take a plurality of values if 12 ≦ Nc) layers, It is installed in the (k + 2) layer, (k + 3) layer and (k + 5) layer, (k + 1) layer and (k + 4) layer. In order to simplify the description, the segment conductors in which slot conductors are installed in the k layer and the (k + 2) layer, the (k + 3) layer and the (k + 5) layer, the (k + 1) layer and the (k + 4) layer are respectively 1-3. It is called a conductor, a 4-6 conductor, and a 2-5 conductor.

  Since a gap is formed between the turn portions of the 1-3 conductor and the 1-3 conductor and the 4-6 conductor and the 4-6 conductor installed in the circumferential direction, the turn of the 2-5 conductor is formed in this gap. Can be set up. Furthermore, since a gap is also formed between the 2-5 conductor installed in the circumferential direction and the turn part of the 2-5 conductor, the 1-3 conductor and 4-6 conductor turn parts are installed in this gap. it can. As a result, these three 1-3 conductors, 4-6 conductors, and 2-5 conductors can be installed on the fixed core without installing other segment conductor turn parts on the outer peripheral side of the segment conductor turn part. The height at which the turn portions of these three segment conductors protrude from the end surface on the axial direction side of the fixed core is lowered. Thereby, the height of a coil end becomes low. When the number of slot conductors installed in each slot is more than 6, the arrangement of the three segment conductors is a basic arrangement structure, so that the height of the coil end can be made as low as possible.

  In the invention according to claims 1 to 6, since the 1-3 conductor, the 4-6 conductor, and the 2-5 conductor are installed in the slot with an interval of at least one layer, the turn portion of each segment conductor The curve becomes gentle. As a result, the turn portion can be formed by reducing the amount of protrusion extending from the slot conductor to both sides in the radial direction as much as possible, so that the amount of protrusion of the stator winding protruding in the radial direction can be reduced.

  In the invention according to claim 2, since Nc = 6, the stator winding can be formed by the 1-3 conductor, the 4-6 conductor, and the 2-5 conductor. As a result, the stator winding can be formed without installing the turn portions of other segment conductors on the outer peripheral side of the turn portions of the segment conductors. Therefore, when Nc = 6, the height of the coil end of the stator winding is reduced. can do.

  In the invention according to claim 3, the connecting portions in which the slot conductors of the three segment conductors are electrically connected to the outside of the slot opposite to the turn portion are displaced from each other in the circumferential direction on the radius. . Thereby, the space | interval of connection parts becomes large compared with the case where the connection part of the slot conductors of a segment conductor is located in a line on the radius. This facilitates the connection work of the slot conductors. Furthermore, since the interval between the connecting portions of the slot conductors of the segment conductor is large, it is advantageous for insulating the connecting portions. Further, if the distance between the connection portions of the slot conductors is the same as the conventional one, the radial width in which the connection portions are arranged can be reduced. Thereby, the overhang | projection amount which the stator coil | winding which protrudes from the slot on the opposite side to a turn part and an axial direction protrudes in a radial direction can be reduced.

  In the fourth aspect of the invention, the phases of the stator windings are electrically connected in parallel, and the two lead wires of the stator windings of the phases electrically connected in parallel are drawn from the same slot. It is. Thus, since it pulls out from the same slot, without separating a leader line, the connection by the side of a leader line becomes easy. For example, as in the invention described in claim 5, when the stator windings of the respective phases electrically connected in parallel are star-connected, the power supply side lead wire and the neutral point side lead wire are respectively connected. By drawing in parallel from adjacent positions of the same slot, the connection on the leader line side is facilitated.

  As described above, in the inventions according to claims 1 to 6, since the bending of the turn portions of the 1-3 conductor, the 4-6 conductor, and the 2-5 conductor becomes gradual, In addition, even if the thickness of the segment conductor insulation coating is 100 μm or more and the thickness of the segment conductor is increased, the bending of the turn portion can be secured while reducing the amount of overhang in the radial direction. Thereby, a segment conductor can be insulated without using insulating materials, such as insulating paper. As a result, since the segment conductor can be installed in the slot without using an insulating material such as insulating paper, the number of steps for assembling the stator of the rotating electrical machine is reduced.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 3 shows the stator of the rotating electrical machine according to the first embodiment of the present invention. The stator 10 shown in FIG. 3 is used, for example, in a rotating electric machine that also serves as a motor and a generator of a vehicle. The stator 10 accommodates the rotor rotatably on the inner peripheral side. The rotor is formed with a plurality of magnetic poles alternately different in the circumferential direction by a permanent magnet on the outer peripheral side facing the inner peripheral side of the stator. The fixed core 12 of the stator 10 is formed in an annular shape by laminating magnetic steel plates having a predetermined thickness in the axial direction. The stator winding 20 is a three-phase winding in which the stator windings 20 of each phase are connected in series and the stator windings 20 of each phase are star-connected.

  Slots 14 are formed in the fixed core 12 at equal intervals in the circumferential direction along the axial direction. Six slots 14 adjacent in the circumferential direction correspond to one pole of the rotor. That is, the magnetic pole pitch is 6 slots. As shown in FIG. 6, the winding pitch of the one-phase stator winding 20 is 5 slots. In FIG. 6, black dots indicate locations where conductors are welded, and numerals 16 to 45 indicate slot numbers. Thus, since the length of the segment conductor per piece is shortened by making the short pitch winding with the magnetic pole pitch 6 slots and the winding pitch 5 slots, the segment conductors 30 forming the stator winding 20, The amount of conductors 40 and 50 (see FIG. 1) decreases.

  Here, in each slot 14, two slot conductors 32, 42, 52 of the segment conductors 30, 40, 50 are arranged in a row in the radial direction. The stator winding 20 of each phase is installed in three slots 14 adjacent in the circumferential direction. However, three one-phase slot conductors 32, 42, and 52 are provided in each of the slots 14 on both sides in the circumferential direction of three slots adjacent in the circumferential direction. The remaining three slot conductors 32, 42, 52 of the same slot 14 are slot conductors 32, 42, 52 of the other phase. Therefore, it can be considered that the stator winding 20 of each phase is installed in two slots 14 adjacent to each other in the circumferential direction per pole of the rotor. Therefore, in this embodiment, when the stator windings 20 of each phase are respectively installed in three sets of slots 14 that are substantially adjacent in the circumferential direction, with two slots 14 adjacent in the circumferential direction as a set. Can be considered. On the other hand, the stator winding 20 may be formed by full-pitch winding with a winding pitch of 6 slots, as in a modification of the first embodiment shown in FIG.

  As shown in FIG. 1, the stator winding 20 is formed by electrically connecting the segment conductors 30, 40, 50 to each other. The segment conductors 30 and 40 are lap-wound, and the segment conductor 50 is wave-wound. As shown in FIG. 4, the segment conductor 30 is formed of a conductor portion 36 and an insulating coating composed of an inner layer 37 and an outer layer 38 that cover the outer periphery of the conductor portion 36 and insulate the conductor portion 36. The inner layer 37 covers the outer periphery of the conductor portion 36, and the outer layer 38 covers the outer periphery of the inner layer 37. The inner layer 37 is made of enamel, and the outer layer 38 is made of an insulating resin such as PPS (polyphenylene sulfide). The thickness of the insulating coating including the inner layer 37 and the outer layer 38 is set to 100 μm or more, preferably 100 μm or more and 200 μm or less. As described above, since the insulating coating composed of the inner layer 37 and the outer layer 38 is thick, it is not necessary to insulate the segment conductors 30 with insulating paper or the like between them. Thereby, the assembly man-hour of the stator 10 reduces. The other segment conductors 40 and 50 have the same configuration as the segment conductor 30 shown in FIG.

As shown in FIG. 1, the segment conductors 30, 40, 50 are slot conductors 32, 42, 52 that are installed in different slots 14 in the circumferential direction of the fixed core 12, and slots that protrude from the slot 14 to the outside of the fixed core 12. It has turn parts 34, 44, 54 which connect conductors 32, 42, 52 to each other.
Six slot conductors are installed in each slot 14 in a row from the radially inner side to the radially outer side of each slot 14. The slot conductor disposed radially inward of each slot 14 is one layer, the slot conductor disposed radially outermost of each slot 14 is six layers, and the six layers of slot conductors are the slots 14. Is installed.

  The segment conductor 30 is provided with slot conductors 32 in the first and third layers of the slot 14 with a winding pitch of 5 slots, and the segment conductor 40 is provided with slot conductors 42 in the fourth and sixth layers of the slot 14 with a winding pitch of 5 slots. The segment conductor 50 is provided with slot conductors 52 in the second and fifth layers of the slot 14 at a winding pitch of 5 slots. With this winding configuration, the segment conductors 40 that protrude from the end face 16 on one axial side of the fixed core 12 to the outside of the slot 14 and that are adjacent to each other in the circumferential direction and between the segment conductors 30 that are adjacent to each other in the circumferential direction. Gaps 300 and 302 are formed between them. Further, a gap 304 is formed between the segment conductors 50 on the turn portion side that protrude from the end face 16 on one axial direction side of the fixed core 12 to the outside of the slot 14 and are adjacent to each other in the circumferential direction. Then, the segment conductor 50 on the turn portion 54 side is installed in two gaps 300 and 302 so as to intersect the segment conductors 30 and 40, and the segment conductors 30 and 40 on the turn portions 34 and 44 side are installed in the gap 304. Yes. As a result, the turn portions 34, 44, 54 of the segment conductors 30, 40, 50 can be arranged without being arranged on the outer peripheral side of the turn portions of the other segment conductors, thereby forming the stator winding 20. Therefore, as shown in FIG. 3, the height h of the coil end of the stator winding 20 on the turn part side is lowered.

  Further, since the segment conductors 30, 40, 50 are disposed in the slot 14 with an interval of at least one layer, the turn portions 34, 44, 54 are gently bent. Thereby, the overhang | projection amount which the turn parts 34, 44, 54 of the segment conductors 30, 40, 50 project from the slot conductors 32, 42, 52 in the radial direction can be minimized. As a result, the radial width of the stator winding 20 protruding from the fixed core 12 on the side of the turn portions 34, 44, 54 is narrowed. Thereby, the overhang | projection amount which the stator coil | winding 20 by the side of the turn parts 34, 44, 54 protrudes to radial direction becomes small. Even if the outer diameter of the fixed core 12 is reduced by reducing the amount of overhang of the stator winding 20 in the radial direction, the end face 16 of the fixed core 12 is disposed radially outward of the stator winding 20 on the turn side. It is possible to secure a predetermined length L of the flat portion.

  On the other hand, as shown in FIG. 2, end portions of the slot conductors 32, 42, 52 projecting from the fixed core 12 to the outside of the slot 14 on the axial direction opposite to the turn portions 34, 44, 54 with respect to the fixed core 12. On the side, one-layer slot conductor 32 and two-layer slot conductor 52 (referred to as a first connection portion), three-layer slot conductor 32 and four-layer slot conductor 42 (referred to as a second connection portion), five-layer slot conductor 52 and six-layer slot conductors 42 (referred to as third connection portions) are electrically connected to each other by welding or the like. On the radius, the second connecting portion is displaced from the first connecting portion and the third connecting portion by a half-slot circumferential position, and the first, second, and third connecting portions are arranged in a staggered manner. Thereby, if the radial width of the stator winding 20 on the axial direction opposite to the turn portions 34, 44, 54 is the same, the first, second, and third connection portions are arranged side by side on the radius. As compared with the above, the interval between the first connection portion and the second connection portion and the interval between the second connection portion and the third connection portion can be increased.

  Further, if the interval between the first connection portion and the second connection portion, and the interval between the first connection portion and the second connection portion are the same as the configuration in which the first, second, and third connection portions are arranged side by side on the radius, The radial width of the stator winding 20 on the axial direction side opposite to the turn portions 34, 44, 54 becomes narrower. Thereby, the overhang | projection amount which the stator coil | winding 20 of the axial direction side opposite to the turn parts 34, 44, and 54 protrudes in radial direction becomes small. Even if the outer diameter of the fixed core 12 is reduced by reducing the radial extension amount of the stator winding 20, the outer side of the stator winding 20 on the opposite side of the turn portions 34, 45, 54 in the radial direction. In addition, the length L of the flat portion of the end surface 16 of the fixed core 12 can be secured to a predetermined length.

Next, the winding configuration of the stator winding 20 formed of a conductor other than the segment conductors 30, 40, 50 will be described with reference to FIGS.
The power supply-side lead wire 61 is led out from the end conductor 60 which is one end of the stator winding 20 of each phase connected in series and is installed in the five layers of the slot 14 (slot number 41 in FIG. 6). Then, the neutral point-side lead wire 63 is led out from the end conductor 62 which is the other end of the stator winding 20 of each phase and is provided in the two layers of the slot 14 (slot number 37 in FIG. 6). ing. Three neutral phase lead lines 63 for each phase are connected together in three phases.

  Further, the segment conductor 70 is installed in two layers (slot number 36 in FIG. 6) and six layers (slot number 41 in FIG. 6) at a winding pitch of 5 slots, and the segment conductor 72 is wound in 5 slots. It is installed in one layer (slot number 37 in FIG. 6) and five layers (slot number 42 in FIG. 6) at a line pitch and is wound. The traveling direction of the stator winding 20 of each phase by the segment conductors 30, 40, 50 is reversed in the circumferential direction at two locations of the segment conductors 70, 72.

Further, in the stator winding 20 of each phase, the winding 1 formed by the segment conductors 30, 40, 50 connected to the power supply side lead wire 61 and the end conductor 60, the neutral point side lead wire 63, and the end conductor The windings 2 formed by the segment conductors 30, 40, 50 connected to 62 are a four-layer conductor 80 (installed in slot number 36 in FIG. 6) and a three-layer conductor 82 (in slot number 42 in FIG. 6) separated by six slots. Installation) is connected electrically by welding or the like.
With the above-described winding configuration, the stator winding 20 of each phase connects the winding 1 on the power source side and the winding 2 on the neutral point side in series.

(Deformation)
FIG. 7 shows a winding diagram of a modification of the first embodiment. Components that are substantially the same as those in the first embodiment are denoted by the same reference numerals. In FIG. 7, black dots indicate locations where conductors are welded, and numerals 16 to 43 indicate slot numbers.
7 is a full-pitch winding having a winding pitch of 6 slots with respect to a magnetic pitch of 6 slots. The slot conductors 32, 42, 52 of the segment conductors 30, 40, 50 of each phase are arranged in a row in the radial direction in two slots 14 adjacent in the circumferential direction. The segment conductors 70 and 72 are installed in the slot 14 with a winding pitch of 6 slots. Further, the four-layer conductor 80 (installed at slot number 35 in FIG. 7) and the three-layer conductor 82 (installed at slot number 42 in FIG. 7) are separated by seven slots.

(Second Embodiment)
A winding diagram of the second embodiment of the present invention is shown in FIG. In addition, the same code | symbol is attached | subjected to the substantially same component as 1st Embodiment. In FIG. 8, black dots indicate locations where conductors are welded, and numerals 16 to 43 indicate slot numbers.
The second embodiment is a full-pitch winding having a winding pitch of 6 slots with respect to the magnetic pole pitch of 6 slots, as in the modification of FIG. The stator windings 20 for each phase are connected in parallel, and the three-phase stator windings 20 are star-connected.

  In each phase, the two power supply side lead wires 61 are led out from the end conductors 60 installed in the fifth and sixth layers of the same slot 14 (slot number 41 in FIG. 8). In each phase, two neutral point-side lead lines 63 are led out from the end conductors 62 installed in the first and second layers of the same slot 14 (slot number 36 in FIG. 8).

  Further, in the stator windings 20 of the respective phases connected in parallel, the segment conductors 30 and 40 installed in the slot 14 having the same 6-slot winding pitch from the one power supply side lead wire 61 and the end conductor 60. , 50 and segment conductors 30, 40, 50 formed at the same 14-slot winding pitch in the slot 14 adjacent to the slot 14 in which the winding is installed. The end of the winding is electrically connected by welding a four-layer conductor 80 (installed at slot number 35 in FIG. 8) and a three-layer conductor 82 (slot number 42 in FIG. 8) separated by 7 slots. Connected to.

  Further, in the stator windings 20 of the respective phases connected in parallel, the segment conductors 30 and 40 installed in the slot 14 having the same 6-slot winding pitch from the other power supply side lead wire 61 and the end conductor 60. , 50 and segment conductors 30, 40, 50 formed at the same 14-slot winding pitch in the slot 14 adjacent to the slot 14 in which the winding is installed. The ends of the windings are electrically connected to each other by segment conductors 90 installed in slots 14 of two layers (slot number 35 in FIG. 8) and five layers (slot number 42 in FIG. 8) separated by seven slots. ing.

With the above-described winding configuration, the stator winding 20 of each phase is connected in parallel between the power supply side and the neutral point side.
In the second embodiment, since the stator windings 20 of the respective phases are connected in parallel, the current value flowing through the rotating electrical machine can be increased. Further, since the two power supply side lead wires 61 and the neutral point side lead wire 63 are respectively drawn from the same slot 14, the lead wires can be easily connected as shown in FIG. Two neutral point-side lead wires 63 for each phase are connected together in three phases.

(Other embodiments)
In the above embodiment, the stator winding 20 in which six segment conductors are installed in each slot 14 has been described. On the other hand, seven or more segment conductors may be installed in each slot 14. In this case, assuming that the number of slot conductors arranged in a row in each slot in a row is Nc (6 ≦ Nc), the three slot conductors installed in two slots having different positions in the circumferential direction are provided. Each of the segment conductors includes two slot conductors, k (an arbitrary value of 1 ≦ k ≦ Nc−5) layer, (k + 2) layer, (k + 3) layer, (k + 5) layer, (k + 1) layer, and (k + 4). ) Should be installed in the layer. If 12 ≦ Nc, the arrangement of the three segment conductors installed in the slot layer may be repeated in the radial direction. That is, k can take a plurality of values in the range of (1 ≦ k ≦ Nc−5). Further, the number of slots Ns for each phase per pole of the rotor is not limited to 2, but may be 3 or more.

In the above embodiment, the stator of the rotating electric machine that also serves as an electric motor and a generator has been described. On the other hand, you may apply the stator of the said embodiment as a stator of the rotary electric machine for exclusive use of either an electric motor or a generator.
Moreover, in the said embodiment, the rotor was installed in the inner peripheral side of the stator, and the structure which a stator faces the rotor on the inner peripheral side was demonstrated. On the other hand, the structure which installs a rotor in the outer peripheral side of a stator, and a stator faces a rotor on the outer peripheral side may be employ | adopted.

In the above embodiment, the three-phase stator winding 20 is star-connected. On the other hand, the three-phase stator winding may be an annular delta connection.
As described above, the present invention is not limited to the above-described embodiment, and can be applied to various embodiments without departing from the gist thereof.

(A) The perspective view which shows the stator coil | winding seen from the turn part side, (B) The perspective view which shows the segment conductor seen from the turn part side. (A) The perspective view which shows the stator coil | winding seen from the connection part side, (B) The perspective view which shows the segment conductor seen from the connection part side. (A) The perspective view which shows a stator, (B) The figure which looked at the stator from the side. Sectional drawing of a segment conductor. (A) The perspective view which looked at the stator coil | winding vicinity of a leader line from the radial direction outer side, (B) The perspective view which looked at the stator winding | coil near the leader line from the radial direction inner side. The winding diagram of the stator winding | coil of 1st Embodiment. The winding diagram of the stator winding | coil of 2nd Embodiment. The winding diagram of the stator coil | winding of 3rd Embodiment. The perspective view which looked at the stator coil | winding vicinity of the leader line of 3rd Embodiment from the radial direction outer side.

Explanation of symbols

10: Stator, 12: Fixed core, 14: Slot, 16: End face, 20: Stator winding, 30, 40, 50: Segment conductor, 32, 42, 52: Slot conductor, 34, 44, 54: Turn Part, 36: conductor part, 37: inner layer (insulation coating), 38: outer layer (insulation coating)

Claims (6)

In the stator of the rotating electrical machine facing the rotor forming the plurality of magnetic poles that are alternately different in the circumferential direction on the inner circumferential side or the outer circumferential side,
A plurality of fixed cores having a plurality of slots in the circumferential direction, two slot conductors installed in the slots having different positions in the circumferential direction, and a plurality of turn portions connecting the slot conductors outside the slots A stator winding formed by connecting the segment conductors of
If the number of the slot conductors arranged in a row in each slot in the radial direction is Nc, 6 ≦ Nc,
When the slot conductors arranged in a line in each slot in a row are formed as one layer, two layers,..., Nc layer from the inside in the radial direction to the outside in the radial direction, the positions are different in the circumferential direction. Each of the three segment conductors in which the slot conductors are installed in two slots, each of the two slot conductors is k (1 ≦ k ≦ Nc−5, and if 12 ≦ Nc, A stator of a rotating electrical machine, wherein the stator is installed in a layer (which can take a value) and a (k + 2) layer, a (k + 3) layer and a (k + 5) layer, a (k + 1) layer and a (k + 4) layer.   The stator of the rotating electrical machine according to claim 1, wherein Nc = 6.   The connecting portions in which the slot conductors of the three segment conductors are electrically connected outside the slot on the side opposite to the turn portion are displaced from each other in the circumferential direction on the radius. The stator of the rotary electric machine according to claim 1 or 2.   Each phase of the stator winding is electrically connected in parallel, and two lead lines of the stator winding of each phase electrically connected in parallel are drawn from the same slot. The stator of the rotary electric machine according to any one of claims 1 to 3.   The stator windings of each phase are electrically connected in parallel, the stator windings of each phase are star-connected, and two power supply side lead wires and a middle wire of the stator windings of each phase The stator of a rotating electrical machine according to claim 4, wherein the point lead lines are respectively drawn in parallel from adjacent positions of the same slot.   The said segment conductor has a conductor part and the insulation coating which covers the outer periphery of the said conductor part, The thickness of the said insulation coating is 100 micrometers or more, It is any one of Claim 1 to 5 characterized by the above-mentioned. Stator of rotating electrical machine.

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