JP2020054028A - Stator, electric motor, and mounting method of bus ring - Google Patents

Abstract

To make it possible to reduce the thickness while achieving higher output.SOLUTION: A stator 14 comprises an annularly formed bus ring 26 having a rectangular cross section, the short-side direction of which is the thickness direction, and the long-side direction of which is the width direction. The bus ring 26, which is provided for each phase, includes a plurality of protrusions 30 that are curved and protruding along the width direction. The bus ring 26 for each phase is mounted on a housing 20 so that the protrusions 30 of each bus ring 26 shift for each phase in the circumferential direction of the bus ring 26 and the thickness direction of the bus ring 26 for each phase goes along with each other in the axial direction.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a method for mounting a stator, an electric motor, and a bus ring.

  As a motor, a three-phase induction motor is known. The three-phase induction motor has U-phase, V-phase, and W-phase coils provided on a stator core, and a bus ring for supplying current to the coils.

  Patent Document 1 below discloses a power collection and distribution ring in which a plurality of bus rings corresponding to each of a U phase, a V phase, and a W phase are stacked. The cross section of each of these bus rings is circular, and the bus ring is formed in an annular shape as a whole.

JP-A-2006-181944

  By the way, in order to supply a large current to each of the plurality of bus rings to increase the output, it is necessary to increase the diameter of the bus rings. However, in the case of the power collection and distribution ring of Patent Document 1, when the diameter of the cross section of the bus ring is increased, the thickness of the power collection and distribution ring on which the bus ring is stacked increases.

  Therefore, an object of the present invention is to provide a method of mounting a stator, an electric motor, and a bus ring that can be made thin while achieving high output.

  According to a first aspect of the present invention, there is provided a stator having a stator core, coils of a plurality of phases wound around the stator core, and a rectangular cross section. A bus ring that is formed in an annular shape with the long side of the cross section as the width direction, and an attachment member that is disposed at one end in the axial direction of the stator core and to which the bus ring is attached, the bus ring includes: A plurality of projections are provided for each of the phases and project in a curved manner along the width direction. The projections of the bus ring of each of the phases are shifted from each other in a circumferential direction of the bus ring, and The bus ring of each of the phases is attached to the attachment member in a state where the thickness direction of the bus ring of each of the phases is along the axial direction.

  A second aspect of the present invention is an electric motor, including the above-described stator and a rotor.

  A third aspect of the present invention is a method of attaching a bus ring for attaching a bus ring for supplying current to coils of a plurality of phases wound around a stator core, wherein a short side of a rectangular cross section is thickened. Forming the annular bus ring having a plurality of protrusions that are curved along the width direction and protrude along the width direction, and one end of the stator core in the axial direction. On the side, the projecting portions of the plurality of bus rings are displaced from each other in the circumferential direction of the bus ring, and the thickness direction of the plurality of bus rings is in the state along the axial direction. And arranging a bus ring.

  Thus, according to the present invention, it is possible to reduce the thickness while increasing the output. That is, in the present invention, the bus rings are arranged for each phase with the short side of the bus ring having a rectangular cross section extending along the axial direction of the stator core. For this reason, compared with the case where bus rings having a circular cross section are arranged for each phase along the axial direction, it is possible to supply a large current to the bus ring while suppressing the space occupied by the bus ring in the axial direction. It becomes possible. Further, the protruding portions of the bus rings of each phase are arranged so as to be shifted in the circumferential direction of the bus ring. For this reason, it is avoided that the coils connected to the bus rings of each phase overlap in the axial direction of the stator core. Therefore, the thickness can be further reduced.

It is a schematic diagram which shows the cross section of an electric motor. 2A is a perspective view showing a bus ring, and FIG. 2B is a cross-sectional view taken along line IIB-IIB of FIG. 2A. It is a schematic diagram which shows the attachment state of a bus ring. It is a flowchart which shows the flow of the attachment method of a bus ring. It is a schematic diagram which shows the attachment state of the bus ring of the modification 1. It is a schematic diagram which shows the attachment state of the bus ring of the modification 2. It is a schematic diagram which shows the attachment state of the bus ring of the modification 3.

  BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to preferred embodiments and the accompanying drawings.

[Embodiment]
FIG. 1 is a schematic diagram showing a cross section of the electric motor 10. The electric motor 10 is an inner rotor type electric motor, and includes a rotor 12 having a rotor core 12A and a magnet 12B, and a stator 14 provided outside the rotor 12.

  The stator 14 has a housing 20, a stator core 22, a coil 24, and a bus ring 26. The housing 20 is a resin member for housing the stator core 22, the coil 24, the bus ring 26, and the like, and is formed in a substantially cylindrical shape.

  The stator core 22 is a member made of an iron-based metal disposed around the rotation axis AX of the electric motor 10, and is formed in a substantially annular shape. Stator core 22 is fixed to housing 20. The stator core 22 may be formed in a substantially annular shape by joining a plurality of split core members in a circumferential direction.

  A plurality of teeth portions 22A are provided on the stator core 22 at intervals in the circumferential direction. The teeth portion 22A protrudes from the inner peripheral surface of the stator core 22 toward the axis (center axis) of the stator core 22. Note that the axis (center axis) of the stator core 22 matches the rotation axis AX of the electric motor 10.

  The coil 24 is wound around the teeth 22A of the stator core 22, and is provided for each of a plurality of phases. The number of phases of the coil 24 is generally three phases of a U phase, a V phase, and a W phase, but the number of phases of the coil 24 may be other than three phases. In the present embodiment, the coils 24 include a U-phase coil 24, a V-phase coil 24, and a W-phase coil 24.

  The bus ring 26 is a power supply line for supplying a current to the coil 24, and is provided for each phase of the coil 24. In the present embodiment, bus ring 26 includes U-phase bus ring 26U for supplying current to U-phase coil 24, V-phase bus ring 26V for supplying current to V-phase coil 24, and W And a W-phase bus ring 26W for supplying current to the phase coil 24.

  U-phase bus ring 26U, V-phase bus ring 26V, and W-phase bus ring 26W have the same shape. Even if there is a tolerance among the U-phase bus ring 26U, the V-phase bus ring 26V, and the W-phase bus ring 26W, they are included in the same shape. In the following description, when referred to as the bus ring 26, it means each of the U-phase bus ring 26U, the V-phase bus ring 26V, and the W-phase bus ring 26W.

  2A is a perspective view showing the bus ring 26, and FIG. 2B is a sectional view taken along line IIB-IIB in FIG. 2A. The bus ring 26 has a structure including a conductor layer 26A and an insulating layer 26B covering the outer peripheral surface of the conductor layer 26A. The bus ring 26 has a rectangular cross section, and is formed in an annular shape with the short side of the cross section being the thickness direction and the long side being the width direction. That is, the ring width W of the bus ring 26 is larger than the ring thickness T of the bus ring 26, and both the ring width W and the ring thickness T are substantially constant along the circumferential direction of the bus ring 26. Note that the thickness direction of the bus ring 26 matches the axial direction of the stator core 22 (the axial direction of the rotation axis AX).

  The bus ring 26 has a plurality of protrusions 30 that are curved and project along the width direction of the bus ring 26. Specifically, the plurality of protruding portions 30 are provided at intervals in the circumferential direction of the annular bus ring 26, and each of the protruding portions 30 projects in a curved manner toward the inside of the annular bus ring 26. The plurality of protrusions 30 have the same shape as each other. In the present embodiment, the shape of the protruding portion 30 is U-shaped, but may be other shapes than U-shaped. Note that even if there is a tolerance between the plurality of protrusions 30, they are included in the same shape.

  The bus ring 26 has a notch 32 in which a part of the bus ring 26 in the circumferential direction is cut out. The notch 32 is less than half the circumference of the bus ring 26. That is, the angle of the notch 32 with respect to the central axis BAX of the annular bus ring 26 is less than 180 degrees. In addition, both end surfaces of the bus ring 26 sandwiching the cutout portion 32 are not parallel to each other in the example shown in FIG. 2A, but may be parallel to each other.

  The bus ring 26 has elasticity in the width direction of the bus ring 26. As described above, since the bus ring 26 has the notch 32, the movable range in the width direction of the bus ring 26 is larger than that in the case where the notch 32 is not provided.

  FIG. 3 is a schematic diagram showing a mounting state of the bus ring 26. In FIG. 3, the stator core 22 is omitted and a part of the coil 24 is omitted to make it easier to see the attached state of the bus ring 26.

  The U-phase bus ring 26U, the V-phase bus ring 26V, and the W-phase bus ring 26W are attached to the inner peripheral surface side of the housing 20 by elasticity in the width direction. The thickness directions of the U-phase bus ring 26U, the V-phase bus ring 26V, and the W-phase bus ring 26W attached to the housing 20 are along the axial direction of the stator core 22 (the axial direction of the rotation axis AX). That is, the bus rings 26 of each phase are arranged along the axial direction of the stator core 22 such that the flat surfaces of the bus rings 26 face each other. Thereby, compared to the case where the bus ring having a circular cross section is arranged along the axial direction of the stator core 22, a large current is supplied to the bus ring 26 while suppressing the space occupied by the bus ring 26 in the axial direction. It becomes possible. Therefore, the thickness can be reduced while increasing the output.

  The U-phase coil 24 is connected to the protrusion 30 of the U-phase bus ring 26U attached to the housing 20. Similarly, a V-phase coil 24 is connected to the projection 30 of the V-phase bus ring 26V attached to the housing 20, and a W-phase coil 24 is connected to the W-phase bus ring 26W attached to the housing 20. Is done. Specifically, the insulating layer 26B (see FIG. 2B) of the protruding portion 30 of the bus ring 26 is peeled off, and the conductor layer 26A (see FIG. 2B) exposed at the peeled portion is in a phase of the bus ring 26. The corresponding phase coils 24 are connected by soldering or the like.

  In the example shown in FIG. 3, a state is shown in which the U-phase coil 24 is connected to only one of the plurality of protrusions 30 in the U-phase bus ring 26U. Are also connected to the coil 24. However, the U-phase coil 24 does not have to be connected to all of the plurality of protrusions 30 in the U-phase bus ring 26. The same applies to V-phase bus ring 26V and W-phase bus ring 26W.

  The protruding portions 30 of the U-phase bus ring 26U, the V-phase bus ring 26V, and the W-phase bus ring 26W attached to the housing 20 are shifted from each other in the circumferential direction of the bus ring 26. This prevents the coils 24 connected to the bus rings 26 of the respective phases from overlapping in the axial direction of the stator core 22. Therefore, the thickness can be reduced.

  Next, a method of attaching the bus ring 26 to the housing 20 will be described. However, it is assumed that a stator core 22 is fixed to the housing 20, and the U-, V-, and W-phase coils 24 are wound around the stator core 22.

  FIG. 4 is a flowchart showing the flow of the method of attaching the bus ring 26. The method of attaching the bus ring 26 includes a forming step P1, an arrangement step P2, and a connection step P3.

  The forming step P1 is a step of forming the bus ring 26. In this forming process P1, the annular bus ring 26 having the short side of the rectangular cross section in the thickness direction and the long side in the width direction has a plurality of protruding portions 30 which are curved and protrude along the width direction. And a notch 32 partially cut out in the circumferential direction.

  In addition, as a specific forming method of the bus ring 26, for example, an edgewise method, a press forming method, a punch forming method, or the like can be given. The edgewise method is a method of bending a rectangular wire having a rectangular cross section in the edgewise direction to form a molded product.

  The arranging step P2 is a step of arranging the bus ring 26 formed in the forming step P1. In the arrangement step P2, the U-phase bus ring 26U, the V-phase bus ring 26V, and the W-phase bus ring 26W formed in the formation step P1 are arranged side by side along the axial direction of the stator core 22. The bus rings 26 of a plurality of phases may be arranged all at once, or may be arranged in a predetermined order for each single phase.

  Specifically, first, the bus ring 26 is deformed so as to reduce its diameter along the width direction of the bus ring 26, and the deformed bus ring 26 is inserted into the cylindrical housing 20. As described above, since the bus ring 26 has the notch 32, the bus ring 26 can be easily deformed along the width direction of the bus ring 26 as compared with the case where the notch 32 is not provided. By deforming to reduce the diameter, the bus ring 26 can be easily inserted into the cylinder of the housing 20.

  Next, the deformation of the bus ring 26 inserted into the cylinder of the housing 20 is released. Here, when the outer diameter D (see FIG. 2A) of the bus ring 26 before deformation is larger than the inner diameter of the cylindrical housing 20, the urging force pressing the inner peripheral surface of the housing 20 by the width direction elasticity of the bus ring 26 is used. Works. Thereby, the effect that the bus ring 26 is easily attached to the inner peripheral surface side of the housing 20 is obtained.

  Next, each of the bus rings 26 of each phase is positioned in a predetermined positional relationship. Specifically, with the phases of U-phase bus ring 26U, V-phase bus ring 26V and W-phase bus ring 26W shifted by a predetermined angle, the U-phase bus ring 26U, V-phase bus ring 26V and W-phase bus ring 26W Are positioned. With this arrangement, the protrusions 30 of the bus ring 26 of each phase are arranged so as to be shifted from each other in the circumferential direction of the bus ring 26. The bus rings 26 of each phase may be attached to the housing 20 in a state where they are positioned in a predetermined positional relationship with each other.

  In this way, the bus rings 26 of each phase are arranged along the axial direction of the stator core 22 so that the flat surfaces of the bus rings 26 face each other through the forming step P1 and the arrangement step P2. Thereby, compared to the case where the bus ring having a circular cross section is arranged along the axial direction of the stator core 22, a large current is supplied to the bus ring 26 while suppressing the space occupied by the bus ring 26 in the axial direction. It becomes possible. Therefore, the thickness can be reduced while increasing the output.

  The connection step P3 is a step of connecting the coil 24 of the corresponding phase to the protrusion 30 of the bus ring 26 of each phase. In this connection step P3, the insulating layer 26B (see FIG. 2B) of the protruding portion 30 of the bus ring 26 of each phase is peeled off, and the conductor layer 26A (see FIG. 2B) exposed at the peeled portion is removed by the bus. The coil 24 of the phase corresponding to the phase of the ring 26 is connected by solder or the like. As described above, in the arrangement step P2, the protruding portions 30 of the bus ring 26 of each phase are shifted from each other in the circumferential direction of the bus ring 26. This prevents the coils 24 connected to the projecting portions 30 of the bus rings 26 of each phase from overlapping in the axial direction of the stator core 22. Therefore, the thickness can be reduced.

(Modification)
The above embodiment has been described as an example of the present invention, but the technical scope of the present invention is not limited to the scope described in the above embodiment. It goes without saying that various changes or improvements can be added to the above embodiment. It is apparent from the description of the appended claims that embodiments with such changes or improvements can be included in the technical scope of the present invention.

(Modification 1)
FIG. 5 is a schematic diagram showing a mounting state of the bus ring 26 of the first modification. In the first modification, a plurality of protrusions 30 that are curved and protrude along the width direction of the bus ring 26 protrude toward the outside of the bus ring 26.

  In the first modification, the bus ring 26 is attached to the housing 20 by pressing the plurality of protrusions 30 against the inner peripheral surface of the housing 20 by the elasticity of the bus ring 26 in the width direction. Even in the case of such an attachment, similarly to the above-described embodiment, the occupied space of the bus ring 26 in the axial direction can be reduced as compared with the case where the bus ring having a circular cross section is arranged along the axial direction of the stator core 22. Also, a large current can be supplied to the bus ring 26. Therefore, the thickness can be reduced while increasing the output.

  Further, in the first modification, the protruding portions 30 of the bus rings 26 of the respective phases are arranged to be shifted in the circumferential direction of the bus rings 26 as in the above-described embodiment. However, in the first modification, the coils 24 are not connected to the protrusions 30, but the coils 24 of the corresponding phases are connected between the protrusions 30 adjacent to each other in the bus ring 26 of each phase. Even when the coils 24 are connected in this manner, the coils 24 connected to the bus rings 26 of the respective phases are prevented from overlapping in the axial direction of the stator core 22, as in the above embodiment. Therefore, the thickness can be reduced.

(Modification 2)
FIG. 6 is a schematic diagram illustrating an attached state of the bus ring 26 according to the second modification. An annular groove 20G is provided for each of a plurality of phases on the inner peripheral surface of the housing 20 according to the second modification, and the bus ring 26 of each phase has one side face in the width direction with respect to the corresponding phase groove 20G. With the part inserted, it is attached to the inner peripheral surface side of the housing 20 by the elasticity in the width direction. In the example shown in FIG. 6, the annular groove 20 </ b> G is capable of inserting the single-phase bus ring 26, but the annular groove 20 </ b> G may be capable of integrally inserting the plurality of phases of the bus ring 26. . Further, the groove 20G need not be annular.

  As described above, the groove 20 </ b> G into which the part of the side surface in the width direction of the single-phase or plural-phase bus ring 26 can be inserted is provided in the inner peripheral surface of the housing 20, so that the inner peripheral surface side of the housing 20 is provided. The bus rings 26 of the respective phases can be easily attached. Further, the displacement of the bus ring 26 in the axial direction of the stator core 22 is easily suppressed.

(Modification 3)
FIG. 7 is a schematic diagram illustrating an attached state of the bus ring 26 of the third modification. The bus ring 26 of the third modification is attached to a plurality of holders 40. The plurality of holders 40 are fixed on the surface of one end side in the axial direction of the stator core 22 at intervals along the circumferential direction of the stator core 22. Each of the plurality of holders 40 holds the bus rings 26 of a plurality of phases arranged side by side along the axial direction of the stator core 22 so as to be bundled together.

  As described above, if the mounting member to which the bus ring 26 is mounted is disposed on one end side in the axial direction of the stator core 22, the housing 20 of the above-described embodiment is the holding member 40 of the third modification. Alternatively, it may be other than the housing 20 and the holder 40.

  The bus rings 26 of a plurality of phases arranged along the axial direction of the stator core 22 may be in a state of being in contact with each other, or may be in a state of not being in contact with each other. The same applies to the above embodiment.

(Modification 4)
The bus ring 26 is applied to the inner rotor type electric motor 10 in the above embodiment, but may be applied to an outer rotor type electric motor.

(Modification 5)
The above-described embodiment and the above-described modified examples may be arbitrarily combined within a range where no contradiction occurs.

[Technical idea obtained from the embodiment]
The technical ideas that can be grasped from the above embodiment will be described below.

(First technical idea)
The stator (14) has a stator core (22), a plurality of phase coils (24) wound around the stator core (22), and a rectangular cross section, with the short side of the cross section being the thickness direction. A bus ring (26) formed in an annular shape with the long side of the cross section as the width direction, and mounting members (20, 40) arranged at one axial end of the stator core (22) to which the bus ring (26) is mounted. And. The bus ring (26) is provided for each phase, and has a plurality of projections (30) that are curved and project along the width direction, and the projections (30) in the bus ring (26) of each phase are provided. The bus ring (26) of each phase is attached to the mounting member (20) in a state where the bus ring (26) is shifted from each other in the circumferential direction and the thickness direction of the bus ring (26) of each phase is along the axial direction. , 40).

  Thereby, it is possible to reduce the thickness while increasing the output. That is, in the stator (14), the bus ring (26) is arranged for each phase with the short side of the bus ring (26) having a rectangular cross section being along the axial direction of the stator core (22). For this reason, compared with the case where bus rings having a circular cross section are arranged in each phase along the axial direction, the bus ring (26) occupies less space in the axial direction, but has a larger space in the bus ring (26). A current can be supplied. Further, the protruding portions (30) of the bus ring (26) of each phase are arranged so as to be shifted in the circumferential direction of the bus ring (26). This prevents the coils (24) connected to the bus rings (26) of each phase from overlapping in the axial direction of the stator core (22). Therefore, the thickness can be further reduced.

  The bus rings (26) of each phase may be of the same shape. Thereby, the number of parts can be reduced as compared with the case where bus rings having different shapes are used for each phase.

  The bus ring (26) has elasticity in the width direction, and may be attached to the attaching members (20, 40) by elasticity. This eliminates the need for an instrument for attaching the bus ring (26) to the attachment members (20, 40), thereby reducing the number of parts.

  The bus ring (26) may have a notch (32) in which a part of the bus ring (26) in the circumferential direction is cut out. Thereby, the elastic force in the width direction of the bus ring (26) can be easily increased.

  The notch (32) may be less than 180 degrees. This makes it easier to attach the bus ring (26) to the attachment member (20, 40) due to the elasticity of the bus ring (26).

  The protrusion (30) may be curved inside the bus ring (26), and the coil (24) may be wound on the protrusion (30). Alternatively, the protrusion (30) may be curved outside the bus ring (26) and the coil (24) may be wound around the bus ring (26).

  The attachment member (20) is a cylindrical housing to which the stator core (22) is fixed, and the bus ring (26) may be attached to the inner peripheral surface or the outer peripheral surface of the housing. This eliminates the need to separately provide a member for fixing the stator core (22) and a member for attaching the bus ring (26), and can reduce the number of components.

(Second technical idea)
The electric motor (10) includes the above-described stator (14) and a rotor (12). The provision of the above-mentioned stator (14) makes it possible to reduce the thickness while increasing the output.

(Third technical idea)
The bus ring (26) is attached by a method of attaching a bus ring (26) for supplying a current to the coils (24) of a plurality of phases wound around the stator core (22). This mounting method includes an annular bus having a plurality of protruding portions (30) that are curved along the width direction and protrude in the width direction, with the short side of the rectangular cross section being the thickness direction and the long side being the width direction. In the forming step (P1) for forming the ring (26), the protruding portions (30) of the plurality of bus rings (26) are arranged on one end side of the stator core (22) in the axial direction in the circumferential direction of the bus ring (26). An arranging step (P2) of arranging the bus rings (26) for each phase in a state where the bus rings (26) are shifted and the thickness direction of the plurality of bus rings (26) is along the axial direction.

  In this mounting method, the bus ring (26) is arranged for each phase with the short side of the bus ring (26) having a rectangular cross section extending along the axial direction of the stator core (22). For this reason, as compared with the case where bus rings having a circular cross section are arranged for each phase along the axial direction, while the space occupied by the bus ring (26) in the axial direction is reduced, the bus ring (26) has a large space. A current can be supplied. Further, the protruding portions (30) of the bus ring (26) of each phase are arranged so as to be shifted in the circumferential direction of the bus ring (26). This prevents the coils (24) connected to the bus rings (26) of each phase from overlapping in the axial direction of the stator core (22). Therefore, the thickness can be reduced. Therefore, the thickness can be reduced while increasing the output.

DESCRIPTION OF SYMBOLS 10 ... Electric motor 12 ... Rotor 14 ... Stator 20 ... Housing (mounting member)
22 ... stator core 24 ... coil 26 ... bus ring 30 ... protruding part 32 ... notch part 40 ... holder (mounting member)

Claims (10)

A stator core,
A plurality of phase coils wound around the stator core;
A bus ring having a rectangular cross-section, and having a short side of the cross-section in a thickness direction and a long side of the cross-section being formed in a width direction;
An attachment member that is arranged on one end side in the axial direction of the stator core and to which the bus ring is attached,
With
The bus ring is provided for each of the phases, and has a plurality of projecting portions that are curved and project along the width direction,
In a state where the protrusions in the bus ring of each phase are shifted from each other in the circumferential direction of the bus ring, and the thickness direction of the bus ring of each phase is along the axial direction, A stator, wherein the bus ring of the phase is attached to the attachment member. The stator according to claim 1, wherein
The stator, wherein the bus rings of each of the phases are identical in shape to one another. The stator according to claim 1 or 2,
The stator, wherein the bus ring has elasticity in the width direction and is attached to the attaching member by the elasticity. The stator according to any one of claims 1 to 3,
The stator, wherein the bus ring has a cutout portion in which a part of the bus ring in the circumferential direction is cut out. The stator according to claim 4, wherein
The stator, wherein the angle of the notch with respect to the axis of the bus ring is less than 180 degrees. It is a stator according to any one of claims 1 to 5,
The stator, wherein the protrusion is curved inside the bus ring, and the coil is wound around the protrusion. It is a stator according to any one of claims 1 to 5,
The stator, wherein the protrusion curves outwardly of the bus ring, and the coil is wound around the bus ring. The stator according to any one of claims 1 to 7,
The stator, wherein the attachment member is a cylindrical housing to which the stator core is fixed, and the bus ring is attached to an inner peripheral surface or an outer peripheral surface of the housing. A stator according to any one of claims 1 to 8,
Rotor and
An electric motor comprising: A bus ring mounting method for mounting a bus ring for supplying current to coils of a plurality of phases wound around a stator core,
Forming the annular bus ring having a plurality of protruding portions that are curved along the width direction and protrude along the width direction, with the short side of the rectangular cross section being the thickness direction and the long side of the cross section being the width direction. Process and
A state in which the protruding portions of the plurality of bus rings are displaced from each other in the circumferential direction of the bus ring on one end side in the axial direction of the stator core, and the thickness direction of the plurality of bus rings is along the axial direction. An arranging step of arranging the bus ring for each phase;
A method of mounting a bus ring, including:

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