JP2013081335A - Manufacturing method of rotary electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method of a rotary electric machine which prevents the occurrence of ripple and improves the space factor.SOLUTION: A manufacturing method of a rotary electric machine including a lamination core 2 and a coil 3 wound around the lamination core 2 includes the steps of: providing twist to protruding parts 10 of a thin plate like core member 8; inserting a filamentous coil member 11 into slots 6 of the twisted lamination core 2; and restoring the protruding parts 10 of the thin plate like core member 8 into the original state by eliminating the twist after the filamentous coil 11 is inserted, in processes from forming the thin plate like core member 8 to forming the lamination core 2.

Description

  The present invention relates to a method of manufacturing a rotating electrical machine such as an electric motor or a generator.

  An electric motor or a generator as a rotating electric machine is radially provided along the circumferential direction, and has a plurality of slots that are open on the peripheral side surface and have a narrow opening compared to the inner back, and between the slots. A laminated core having a partition wall and a coil formed by winding a linear coil member inserted into the slot around the laminated core.

  Conventionally, the rotating electrical machine is manufactured as follows. First, a thin plate-like core member is formed that includes a concave portion corresponding to the slot of the laminated core and a convex portion corresponding to the partition portion of the laminated core. Next, the laminated core is formed by laminating a plurality of the thin plate-like core members in the thickness direction and press-bonding them, and then inserting the linear coil member into the slot of the laminated core. Thus, the coil is wound around the laminated core (see, for example, Patent Document 1).

  In general, the larger the space factor represented by the following equation (1), the better the rotating electric machine.

Space factor (%) = S _A / S _B × 100 (1)
S _A : Total cross-sectional area of the linear coil member inserted into the slot.

S _B : Cross-sectional area of the slot in a plane parallel to the thickness direction of the laminated core.

  Therefore, when manufacturing the rotating electrical machine, by widening the opening of the slot that opens to the peripheral side surface of the laminated core, to increase the cross-sectional area of the slot in the plane parallel to the thickness direction of the laminated core, It is conceivable to increase the total space factor by increasing the total number of the linear coil members inserted into the slots.

JP 2000-245120 A

  However, when the opening of the slot of the laminated core is widened, a gap more than necessary is generated between the slot and the coil, so that ripple occurs, vibration, noise, etc. There is an inconvenience that it may occur.

  An object of the present invention is to provide a method of manufacturing a rotating electrical machine that can eliminate such inconvenience, prevent occurrence of ripples, and improve the space factor.

  In order to achieve the above object, the present invention provides a plurality of slots that are continuously provided in a radial direction along the circumferential direction, open to a peripheral side surface, and have a narrow opening compared to the inner back, and each of the slots. In a method for manufacturing a rotating electrical machine, comprising a laminated core having a partition wall therebetween and a coil formed by winding a linear coil member inserted into the slot around the laminated core, corresponding to the slot of the laminated core The step of forming a thin plate-like core member comprising a concave portion and a convex portion corresponding to the partition wall portion of the laminated core, and laminating a plurality of the thin plate-like core members in the thickness direction and pressing the laminate A step of forming a core, and a step of imparting a twist with respect to a thickness direction to the convex portion of the thin plate-like core member in a step from the step of forming the thin plate-like core member to the step of forming the laminated core. A step of inserting the linear coil member into the slot of the laminated core provided with the twist on the convex portion of the thin plate-shaped core member; and after inserting the linear coil member into the slot, And a step of recovering the convex portion to its original shape by releasing the twist imparted to the convex portion of the thin plate-like core member.

  In the manufacturing method of the present invention, first, a thin plate-like core member is formed that includes a concave portion corresponding to the slot of the laminated core and a convex portion corresponding to the partition portion of the laminated core. At this time, the opening that opens on the peripheral side surface of the recess of the thin plate-shaped core member corresponds to the opening of the slot and is narrower than the inner depth of the recess of the thin plate-shaped core member. , Having a predetermined opening width.

  Next, a plurality of the thin plate-like core members are laminated in the thickness direction and pressure-bonded so that the positions of the concave portions and the positions of the convex portions of the adjacent thin plate-like core members coincide with each other. Thereby, the said laminated core provided with the said slot which consists of the said recessed part of several said thin plate-like core members, and the said partition part which consists of the said convex part of these several thin plate-like core members is formed.

  In the manufacturing method of the present invention, in the process from the step of forming the thin plate core member to the step of forming the laminated core, a twist in the thickness direction is imparted to the convex portion of the thin plate core member. For example, in the step of forming the thin plate core member, the twist may be imparted to the convex portion, and after the step of forming the thin plate core member and before the step of forming the laminated core. The twist may be imparted to the convex portion. Moreover, you may provide the said twist to each said convex part of the said thin-plate core member which comprises this laminated core in the process of forming the said laminated core.

  When the twist is applied, the adjacent convex portions may be alternately twisted in different directions, or the adjacent convex portions may be twisted in the same direction. As a result of the step of imparting the twist, the opening of each of the recesses of the thin plate core member is greatly expanded from the predetermined opening width, and the surface in a plane parallel to the thickness direction of the thin plate core member The cross-sectional area of the recess is increased.

  Next, the linear coil member is inserted into the slot of the laminated core in which the twist is applied to the convex portion of the thin plate core member. At this time, the opening that opens to the peripheral side surface of the recess of the thin plate-shaped core member, that is, the opening that opens to the peripheral side surface of the slot of the laminated core is in an expanded state, and the thin plate The cross-sectional area of the recess in the plane parallel to the thickness direction of the core member, that is, the cross-sectional area of the slot in the plane parallel to the thickness direction of the laminated core is large. Therefore, compared with the conventional manufacturing method in which the linear coil member is inserted into the slot without widening the opening that opens to the peripheral side surface of the slot of the laminated core, the insertion into the slot is performed. The total number of linear coil members can be increased.

  Next, by releasing the twist imparted to the convex portion of the thin plate-like core member, the convex portion is restored to its original shape. As a result, the opening opening in the peripheral side surface of the recess of the thin plate core member expanded in the step of imparting the twist, that is, the opening opening in the peripheral side surface of the slot of the laminated core is the twist. Is returned to the predetermined opening width, that is, the cross-sectional area of the slot in the plane parallel to the thickness direction of the laminated core returns to the original size. Further, a gap between the linear coil member inserted into the slot and the slot is narrowed.

  As described above, a rotating electrical machine including the laminated core and a coil wound around the laminated core can be manufactured.

  According to the manufacturing method of the present invention, compared to the conventional manufacturing method, the total number of the linear coil members inserted into the slot can be increased and the twisted step is expanded. The opening of the thin plate core member is restored to the original opening width by the step of releasing the twist. Therefore, according to the manufacturing method of the present invention, since the gap between the slot and the coil can be reduced, a rotating electrical machine that can prevent ripples and improve the space factor is manufactured. be able to.

  In the manufacturing method of the present invention, when the linear coil member is inserted into the slot, the linear coil member bent in advance in the shape of the coil may be inserted, or the linear The coil member may be bent into the shape of the coil after being inserted into the slot. In the former case, the linear coil member can be inserted into the slot from the opening of the slot. In the latter case, the linear coil member can be inserted into the slot from the opening of the slot, but the linear coil member is inserted into the slot from the bottom surface side of the laminated core. Is preferred.

  That is, in the manufacturing method of the present invention, the step of inserting the linear coil member into the slot includes the step of inserting the first linear coil member having the first engagement portion at the tip portion into one of the laminated cores. A second linear coil member having a second engaging portion at the tip is inserted into the slot from the bottom surface side, and inserted into the slot from the other bottom surface side of the laminated core. The first engaging portion and the second engaging portion are brought into contact with each other, and in the step of releasing the twist, the twist of the first linear coil member is released by releasing the twist. It is preferable to crimp the engagement portion of the second linear coil member and the second engagement portion of the second linear coil member.

  First, in the step of inserting the linear coil member into the slot, the first linear coil member is inserted into the slot from the one bottom surface side, while the second linear coil member is inserted into the slot. The first engaging portion and the second engaging portion are brought into contact with each other by being inserted into the slot from the other bottom surface side.

  Next, in the step of releasing the twist, by releasing the twist, the first engagement portion of the first linear coil member and the second engagement of the second linear coil member. Crimp the joint. At this time, a gap between each linear coil member inserted in the slot and the slot is narrowed.

  Thereafter, by bending the linear coil member into the shape of the coil, a rotating electrical machine including the laminated core and a coil wound around the laminated core can be formed.

  In the manufacturing method of the present invention in which each linear coil member is inserted into the slot from the bottom surface side of the laminated core, the cross-sectional area of the slot is increased by the step of applying the twist, and the twist is reduced. The cross-sectional area of the slot is restored to the original state by the releasing step. Therefore, according to the manufacturing method of the present invention, when each of the linear coil members is inserted into the slot, it is not necessary to provide a gap necessary for the insertion, and the gap between the slot and the coil Therefore, the rotating electrical machine that can further improve the space factor can be manufactured.

Sectional drawing in the surface parallel to the thickness direction of the laminated core of a stator. Process drawing which shows the process of providing a twist to the convex part of a thin-plate core member. Process drawing which shows the difference of the twist direction in the process of providing a twist. Process drawing which shows the process of forming a lamination | stacking core. Process drawing which shows the process of inserting a linear coil member. Process drawing which shows the process of inserting the 1st and 2nd linear coil member.

  Next, embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

  A stator 1 of the rotating electrical machine shown in FIG. 1 includes a laminated core 2 and a coil 3 wound around the laminated core 2. An annular rotor 4 is disposed on the inner peripheral side of the stator 1 with a predetermined interval from the inner peripheral surface of the stator 1. An annular permanent magnet 5 is disposed between the inner peripheral surface of the stator 1 and the outer peripheral surface of the rotor 4.

  The laminated core 2 is continuously provided in a radial direction along the circumferential direction, and has a plurality of slots 6 that are open on the inner peripheral surface and have narrow openings 6b as compared with the inner back part 6a, and the adjacent slots 6 A partition wall 7 that separates the slot 6 is provided. The laminated core 2 is formed by laminating thin plate core members 8 made of a plurality of electromagnetic steel plates in the thickness direction.

  The thin plate-like core member 8 shown in FIG. 2A includes a concave portion 9 corresponding to the slot 6 of the laminated core 2 and a convex portion 10 corresponding to the partition wall portion 7 of the laminated core 2.

  The coil 3 is composed of a linear coil member 11 that is a conducting wire covered with an insulating coating. The linear coil member 11 is accommodated in the slot 6.

  The stator 1 shown in FIG. 1 can be manufactured as follows. First, an annular thin plate-shaped core member 8 having a plurality of concave portions 9 and convex portions 10 is formed on the inner peripheral surface shown in FIG. At this time, the concave portions 9 of the thin plate-like core member 8 are continuously provided in a radial direction along the circumferential direction, open to the inner peripheral surface, and include an opening 9b that is narrower than the inner back portion 9a.

  Next, the thin plate-like core member 8 is pressed to impart a twist in the thickness direction to each convex portion 10 as shown in FIG. At this time, as shown in FIG. 3A, the adjacent convex portions 10, 10 may be alternately twisted in different directions, or as shown in FIG. 3B, the adjacent convex portions 10 are twisted. , 10 may be twisted in the same direction. As a result of twisting the convex portion 10, the opening 9 b of each concave portion 9 of the thin plate-like core member 8 is greatly expanded, and the cross-sectional area of the concave portion 9 in a plane parallel to the thickness direction of the thin plate-like core member 8 is increased. growing.

Here, the opening width of the opening 9b of the recess 9 before being twisted is W ₀ , the length of the portion facing the inner peripheral surface of the protrusion 10 before being twisted is L, and the twist being given Is θ, the opening width W ₁ of the opening 9b of the recess 9 after the twist is applied can be expressed by the following equation (2).

W ₁ = W ₀ + 2L (1-cos θ) (2)
Next, as shown in FIG. 4, the laminated core 2 is formed by laminating a plurality of thin plate-like core members 8 to which the respective protrusions 10 are twisted in the thickness direction, pressing and crimping. 4 (a) and 4 (b) show a state in which adjacent convex portions 10 and 10 are laminated with thin plate-like core members 8 twisted in different directions, and FIG. 4 (c) shows adjacent convex portions 10 and 10. Shows a state in which thin plate core members 8 twisted in the same direction are stacked.

The laminated core 2 is provided with a slot 6 composed of concave portions 9 of a plurality of thin plate core members 8 and a partition wall portion 7 composed of convex portions 10. At this time, the opening width of the opening portion 6b of the slots 6 which open in the inner peripheral surface of the laminated core 2 becomes W _1.

  Next, as shown in FIG. 5A, the linear coil member 11 bent into the shape of the coil 3 is inserted into the slot 6 of the laminated core 2 from the opening 6 b. At this time, the opening 9b of the recess 9 of the thin plate-like core member 8 is greatly widened, so that the opening 6b of the slot 6 of the laminated core 2 is in a state of being greatly widened. The cross-sectional area of the slot 6 in the plane parallel to the thickness direction is large. For this reason, compared with the conventional manufacturing method which inserts the linear coil member 11 in this slot 6, without expanding the opening part 6b of the slot 6 of the laminated core 2, the linear coil member inserted in the slot 6 The total number of 11 can be increased.

Next, as shown in FIG. 5B, the laminated core 2 is pressed so that the upper bottom surface and the lower bottom surface of each partition wall portion 7 are parallel to the thickness direction. The twist imparted to the convex portion 10 is released, and the convex portion 10 is restored to its original shape. As a result, the opening 9b of the recess 9 of the thin plate-like core member 8 expanded in the step of imparting the twist, that is, the opening 6b of the slot 6 of the laminated core 2 is in a state before the twist is imparted, That is, the opening width returns from W ₁ to W ₀ , and the cross-sectional area of the slot 6 in the plane parallel to the thickness direction of the laminated core 2 returns to the original size.

  As described above, the stator 1 including the laminated core 2 and the coil 3 wound around the laminated core 2 shown in FIG. 1 can be formed.

Therefore, according to the manufacturing method of the present embodiment, the total number of the linear coil members 11 inserted into the slot 6 can be increased as compared with the conventional manufacturing method, and the twist is applied in the step of applying the twist. opening 9b of the recess 9 of the thin plate core member 8 which is, so it is restored to the opening width W ₀ of the original condition by the step of releasing the twist, to improve the space factor as well as prevent the occurrence of ripples The stator 1 which can be manufactured can be manufactured.

  In the present embodiment, the thin plate-like core member 8 is twisted to each convex portion 10 and then the plurality of thin plate-like core members 8 to which the twist is given is laminated to form the laminated core 2. Instead, after forming a laminated core 2 by laminating a plurality of thin plate-like core members 8 to which no torsion is imparted, by imparting a twist to the partition wall portion 7 of the laminated core 2, You may decide to give a twist to each convex part 10. FIG.

  In the present embodiment, after the magnetic steel sheet is pressed to form the annular thin plate-like core member 8, a twist is imparted to each convex portion 10. Instead, the following may be used. .

  First, the electrical steel sheet is punched out so that a plurality of substantially teardrop-shaped holes are arranged radially. Next, the inner peripheral side of the plurality of radially arranged holes formed in the electromagnetic steel sheet is punched out into a circular shape, thereby cutting out the tip of the hole. As a result, a portion corresponding to the concave portion 9 of the thin plate-shaped core member 8 is formed in the electromagnetic steel plate, and the thin plate is formed between the portions corresponding to the adjacent concave portions 9. A portion corresponding to the convex portion 10 of the core member 8 is formed. Next, torsion is imparted to portions corresponding to the respective convex portions 10 of the electromagnetic steel sheet. Next, the outer peripheral side of the portion corresponding to the concave portion 9 of the electromagnetic steel sheet, that is, the outer peripheral side of the substantially teardrop-shaped hole is cut. Thereby, the annular thin-plate-shaped core member 8 provided with the some recessed part 9 and the convex part 10 in the internal peripheral surface, and to which the twist was provided to this convex part 10 can be formed.

  In the present embodiment, the linear coil member 11 bent in the shape of the coil 3 is inserted into the slot 6 of the laminated core 2, but after the linear coil member 11 is inserted into the slot 6, the coil You may bend in the shape of 3.

  Next, a method of bending the linear coil members 12 and 13 into the shape of the coil 3 after inserting the linear coil members 12 and 13 into the slot 6 will be described with reference to FIG. The description of the same steps as the above-described method for inserting the linear coil member 11 bent into the shape of the coil 3 into the slot 6 of the laminated core 2 will be omitted.

  First, the thin plate-like core member 8 is formed, and a twist is applied to each convex portion 10 of the thin plate-like core member 8. Next, the thin plate-like core member 8 to which the twist is applied to each convex portion 10 is laminated and pressure-bonded.

  Next, the front end portion of the first linear coil member 12 is cut obliquely with respect to the axial direction, thereby forming the first engagement portion 12a at the front end portion. By cutting the distal end portion of the second linear coil member 13 obliquely with respect to the axial direction, a second engagement portion 13a that can be engaged with the first engagement portion 12a is formed at the distal end portion. .

  Next, as shown in FIG. 6 (a), the tip of the first linear coil member 12 is inserted into the slot 6 from the upper bottom surface side of the laminated core 2, and the second linear coil member 13. The distal end portion is inserted into the slot 6 from the other bottom surface side of the laminated core 2, and the first engaging portion 12a and the second engaging portion 13a are brought into contact with each other.

  Next, as shown in FIG. 6B, the laminated core 2 is pressed so that the upper and lower bottom surfaces of the partition walls 7 are parallel to the thickness direction. The twist applied to the convex portion 10 is released, the convex portion 10 is restored to the original shape, and the first engaging portion 12a of the first linear coil member 12 and the second linear coil member 13 are restored. The second engaging portion 13a is crimped. At this time, the gap between each of the linear coil members 12 and 13 inserted into the slot 6 and the slot 6 is narrowed.

  Next, by bending the linear coil members 12 and 13 into the shape of the coil 3, the stator 1 including the laminated core 2 and the coil 3 wound around the laminated core 2 shown in FIG. 1 is formed. be able to.

  In the manufacturing method of this embodiment, the cross-sectional area of the slot 6 is increased by the step of imparting the twist, and the cross-sectional area of the slot 6 is restored to the original state by the step of releasing the twist. Therefore, according to the manufacturing method of the present embodiment, when the linear coil members 12 and 13 are inserted into the slot 6, it is not necessary to provide a gap necessary for the insertion, and between the slot 6 and the coil 3. Therefore, the stator 1 that can further improve the space factor can be manufactured.

  In addition, although this embodiment demonstrated the manufacturing method of the stator 1 of a rotary electric machine, the same manufacturing method is applicable also to the rotor of a rotary electric machine.

  Next, examples and comparative examples are shown.

[Example 1]
In this example, first, an annular thin plate-shaped core member 8 was formed from an electromagnetic steel plate having a thickness of 0.3 mm. The opening width W ₀ of the opening 9b of the recess 9 of the thin plate-shaped core member 8 was 1.9 mm.

Next, the twist with respect to the thickness direction was given to each convex part 10 of the thin plate-like core member 8. The applied twist θ was 15 °. As a result of applying the twist, opening 9b of the recess 9 of the thin plate core member 8 is spread large opening width W ₁ becomes 2.28 mm.

  Next, the laminated core 2 was formed by laminating and crimping a plurality of thin plate-like core members 8 each having a twist applied to each convex portion 10.

  Next, the linear coil member 11 having a diameter of 0.96 mm was inserted into the slot 6 of the laminated core 2 from the opening 6b. At this time, 120 linear coil members 11 were inserted.

  Next, by pressing the laminated core 2 so that the upper bottom surface and the lower bottom surface of each partition wall portion 7 are parallel to the thickness direction, the twist imparted to the convex portion 10 of each thin plate core member 8 is reduced. The convex portion 10 was restored to its original state.

  The space factor of the stator 1 of this example obtained as described above was calculated to be 51%. The results are shown in Table 1.

[Comparative Example 1]
In this comparative example, the laminated core 2 was formed in exactly the same way as in Example 1 except that no twisting in the thickness direction was given to each convex portion 10 of the thin plate-like core member 8.

  Next, the same linear coil member 11 as that used in Example 1 was inserted into the slot 6 of the laminated core 2 from the opening 6b. At this time, 110 linear coil members 11 were inserted.

  With respect to the stator 1 of this comparative example obtained as described above, the space factor was calculated to be 46%. The results are shown in Table 1.

[Table 1]

  From Table 1, it is clear that the stator 1 of Example 1 has a larger space factor than the stator 1 of Comparative Example 1. Therefore, it is clear that the stator 1 of Example 1 has superior performance as compared with the stator 1 of Comparative Example 1.

[Example 2]
In this example, the laminated core 2 was formed in exactly the same way as in Example 1.

  Next, the front end portion of the first linear coil member 12 having a cross-sectional dimension of 2.1 × 3.95 mm was cut obliquely to form a first engagement portion 12a at the front end portion. Next, the distal end portion of the second linear coil member 13 having the same dimensions as the first linear coil member 11 is obliquely cut, and the distal end portion can be engaged with the first engaging portion 12a. A second engaging portion 13a was formed.

  Next, the distal end portion of the first linear coil member 12 is inserted into the slot 6 from the upper bottom surface side of the laminated core 2, and the distal end portion of the second linear coil member 13 is inserted into the other bottom surface of the laminated core 2. The first engaging portion 12a and the second engaging portion 13a were brought into contact with each other by being inserted into the slot 6 from the side. At this time, ten linear coil members 12 and 13 were inserted.

  Next, by pressing the laminated core 2 so that the upper bottom surface and the lower bottom surface of each partition wall portion 7 are parallel to the thickness direction, the twist imparted to the convex portion 10 of each thin plate core member 8 is reduced. The convex portion 10 was restored to its original state.

  The space factor of the stator 1 of the present example obtained as described above was calculated to be 63.6%. The results are shown in Table 2.

[Comparative Example 2]
In this comparative example, the laminated core 2 was formed in exactly the same way as in Example 2 except that no twist in the thickness direction was given to each convex portion 10 of the thin plate-like core member 8. At this time, the laminated core 2 was provided with a clearance (gap) of 0.1 mm in order to insert the linear coil members 12 and 13.

  Next, the linear coil members 12 and 13 that are exactly the same as those of the second embodiment except that the cross-sectional dimension is 2.1 × 3.75 mm are placed in the slot 6 of the laminated core 2 with the upper bottom surface and the lower surface. The first engaging portion 12a and the second engaging portion 13a were brought into contact with each other through the bottom surface. At this time, ten linear coil members 12 and 13 were inserted.

  The space factor of the stator 1 of this comparative example obtained as described above was calculated to be 62.6%. The results are shown in Table 2.

[Table 2]

  From Table 1, it is clear that the stator 1 of Example 2 has a larger space factor than the stator 1 of Comparative Example 2. Therefore, it is clear that the stator 1 of Example 2 has superior performance as compared with the stator 1 of Comparative Example 2.

  DESCRIPTION OF SYMBOLS 1 ... Stator, 2 ... Laminated core, 3 ... Coil, 6 ... Slot, 6a ... Inner part of slot, 6b ... Opening part of slot, 7 ... Partition part, 8 ... Thin plate-shaped core member, 9 ... Recessed part, 10 ... Projection, 11 ... linear coil member, 12 ... first linear coil member, 12a ... first engagement part, 13 ... second linear coil member, 13a ... second engagement part.

Claims (2)

A laminated core having a plurality of slots continuously provided radially along the circumferential direction, having openings that are narrow in comparison with the inner back and opening on the peripheral side surface, and a partition between the slots, and
In a manufacturing method of a rotating electrical machine comprising a coil formed by winding a linear coil member inserted into the slot around the laminated core,
Forming a thin plate-like core member comprising a concave portion corresponding to the slot of the laminated core and a convex portion corresponding to the partition portion of the laminated core;
A step of forming the laminated core by laminating a plurality of the thin plate core members in the thickness direction and press-bonding;
In the process from the step of forming the thin plate core member to the step of forming the laminated core, the step of imparting a twist in the thickness direction to the convex portion of the thin plate core member;
Inserting the linear coil member into the slot of the laminated core provided with the twist on the convex portion of the thin plate-shaped core member;
After the linear coil member is inserted into the slot, the projecting portion is restored to its original shape by releasing the twist imparted to the convex portion of the thin-plate core member. A method of manufacturing a rotating electrical machine. In the manufacturing method of the rotary electric machine according to claim 1,
In the step of inserting the linear coil member into the slot, a first linear coil member having a first engaging portion at the tip is inserted into the slot from one bottom surface side of the laminated core. On the other hand, a second linear coil member having a second engagement portion at the tip is inserted into the slot from the other bottom surface side of the laminated core, and the first engagement portion and the second engagement portion are inserted. The contact part of
In the step of releasing the twist, the first engagement portion of the first linear coil member and the second engagement portion of the second linear coil member are released by releasing the twist. A method of manufacturing a rotating electrical machine, characterized by crimping.

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