WO2020183693A1

WO2020183693A1 - Stator, rotating electric machine, and method for manufacturing stator

Info

Publication number: WO2020183693A1
Application number: PCT/JP2019/010514
Authority: WO
Inventors: 啓生大藤; 泰士山本
Original assignee: 三菱電機株式会社
Priority date: 2019-03-14
Filing date: 2019-03-14
Publication date: 2020-09-17
Also published as: JP7113959B2; JPWO2020183693A1

Abstract

This stator is provided with: a plurality of magnetic pole pieces; a yoke piece provided between the magnetic pole pieces adjacent to each other; coils wound around the magnetic pole pieces; an insulator provided between the magnetic pole pieces and the coils; and a bus bar through which the coils are passed from one of the plurality of magnetic pole pieces to another one thereof. The magnetic pole pieces and the yoke piece are connected to each other at a thin wall portion in a bendable manner, and the bus bar is disposed together with the thin wall portion in a bendable manner.

Description

Manufacturing method of stator, rotary electric machine and stator

The present invention relates to a stator, a rotary electric machine, and a method for manufacturing a stator.

Conventionally, in a rotary electric machine stator used for a vehicle, for example, an insulator is attached to the stator core, and an electric wire is wound around a plurality of teeth portions of the stator core to form a coil of a plurality of phases. Some such stators connect the coils of each phase to the bus bar to conduct them (see, for example, Patent Document 1 and Patent Document 2).

Japanese Unexamined Patent Publication No. 2008-31277 Japanese Unexamined Patent Publication No. 2007-20263

However, in the conventional stator described in Patent Document 1, the bus bar is manufactured in a straight line, processed independently into an annular shape, and then assembled to the stator. For this reason, the man-hours for processing the bus bar are increasing.

In the conventional stator described in Patent Document 2, the bus bar is independently and complicatedly bent so that the terminals are not located on the outer peripheral side of the stator. Then, after the bus bar is bent, it is assembled to the stator. Therefore, the man-hours for processing the bus bar are increasing.

The present invention has been made to solve the above problems, and obtains a method for manufacturing a stator, a rotary electric machine, and a stator, which can reduce man-hours for processing a bus bar.

The stator according to the present invention includes a plurality of magnetic pole pieces, a joint iron piece provided between adjacent magnetic pole pieces, a coil wound around the magnetic pole pieces, and an insulator provided between the magnetic pole pieces and the coil. It is provided with a bus bar that passes through when passing a coil between one magnetic pole piece of a plurality of magnetic pole pieces and another magnetic pole piece, and the magnetic pole piece and the joint iron piece are foldably connected at a thin wall portion, and the bus bar is formed. It is arranged so that it can be folded together with the thin part.

According to the present invention, the bus bar is bent together with the stator core to form an annular stator. This eliminates the need for the step of forming the bus bar independently in an annular shape, and can reduce the processing cost of the rotary electric machine.

It is a top view which shows the stator in Embodiment 1 of this invention. It is a top view which showed the stator of FIG. 1 in the state which was developed linearly before the electric wire was wound. It is a perspective view of the stator of FIG. It is a perspective view which shows the bus bar which constitutes the stator of FIG. It is a top view which shows the stator core which constitutes the stator of FIG. It is an enlarged view of the part A of FIG. 5A. It is a top view which shows the state which the stator of FIG. 2 is bent in the opposite direction. It is a top view which shows a part of the stator core of FIG. 5A. FIG. 7 is a plan view showing a state in which the stator core of FIG. 7A is bent in the opposite direction. FIG. 7 is a plan view showing a state in which the stator core of FIG. 7A is bent in the forward direction. It is a top view which shows the region where the electric wire is wound around the stator core. It is a top view which shows the modification of the stator of Embodiment 1. FIG. FIG. 5 is a plan view showing a state in which the stator of the modified example of FIG. 9 is bent in the opposite direction. It is a figure which shows the manufacturing flow of the stator of Embodiment 1. FIG. 5 is a plan view showing the stator according to the second embodiment of the present invention in a linearly developed state before the electric wire is wound. It is a top view which shows a part of the stator of FIG. It is a perspective view of the bus bar which constitutes the stator of FIG. It is a top view of the bus bar of FIG. 14A. It is a top view which shows the state before and after bending of the stator of FIG. It is a top view which shows the modification of the stator of Embodiment 2. FIG. 5 is a partial plan view showing the stator according to the third embodiment of the present invention in a linearly developed state before the electric wire is wound. It is a top view of the stator of FIG. It is a perspective view of the stator of FIG. 18A. FIG. 5 is a plan view showing the stator according to the fourth embodiment of the present invention in a linearly developed state before the electric wire is wound. It is a top view which shows a part of the stator of FIG. It is a top view which shows the state which the stator of FIG. 20A is bent in the opposite direction. It is a top view which shows the state which the stator of FIG. 20A is bent in the positive direction. It is sectional drawing along the axial direction of the rotary electric machine which used the stator in Embodiment 5 of this invention. FIG. 21 is a cross-sectional view taken along the line XXII-XXII of the stator constituting the rotary electric machine of FIG. It is a partially enlarged view of the stator of FIG. It is sectional drawing which shows the 1st modification of the stator of Embodiment 5. It is sectional drawing which shows the 2nd modification of the stator of Embodiment 5.

Embodiment 1.
FIG. 1 is a plan view of the stator 200 according to the first embodiment of the present invention as viewed from the axial direction. FIG. 2 is a plan view showing the stator 200 of FIG. 1 in a linearly developed state before the electric wire is wound. Further, FIG. 3 is a perspective view of the stator of FIG. Hereinafter, description will be made with reference to figures.

As shown in FIGS. 1 to 3, the stator 200 includes a stator core 1 composed of a plurality of magnetic pole pieces 2 and a joint iron piece 3 provided between the adjacent magnetic pole pieces 2, a coil 120 wound around each magnetic pole piece 2, and the coil 120. It has an insulator 4 which is an insulator that insulates a magnetic pole piece 2 and a joint iron piece 3 and a coil 120, and a bus bar 5 provided with a terminal for passing a coil of the same phase, and is formed in an annular shape. Each magnetic pole piece 2 and each joint iron piece 3 are formed by laminating a thin plate-shaped electromagnetic steel plate punched out. In addition, each magnetic pole piece 2 and each joint iron piece 3 may be formed in the shape of one block.

The bus bar 5 is insert-molded into the insulator 4 and integrally forms the bus bar assembly 51. The bus bar assembly 51 is assembled to the stator core 1, and the coil 120 is wound to form the stator 200.

FIG. 4 is a diagram showing the bus bar 5 before bending. The bus bar 5 is provided with a plurality of terminals 5A to which the coil 120 is connected. The plurality of terminals 5A are exposed from the insulator 4 and insert-molded.

FIG. 5A is a diagram showing the stator core 1 before bending. The stator core 1 is formed by laminating a plurality of punched thin plate-shaped electromagnetic steel sheets in the axial direction of a rotary electric machine. As shown in FIG. 5A, the stator core 1 is formed in a shape in which six magnetic pole pieces 2 and six joint iron pieces 3 are alternately and continuously arranged. Further, a coupling convex portion 10 is formed on the magnetic pole piece 2 that forms one end of the stator core 1. Further, a coupling recess 11 is formed in the joint iron piece 3 forming the other end portion of the stator core 1. Here, the number of magnetic pole pieces 2 and the number of joint iron pieces 3 are the same, but the number of magnetic pole pieces 2 and the number of joint iron pieces 3 are not the same, such as when a plurality of joint iron pieces 3 are provided between the magnetic pole pieces 2. May be good.

FIG. 5B is an enlarged view of part A of FIG. 5A. The plurality of magnetic pole pieces 2 forming the stator core 1 are formed on the radial outer side of the stator 200, respectively, and rotate from the first back yoke portion 7A and the first back yoke portion 7A arranged on the outer circumference of the ring. It has a teeth portion 8 extending radially inward toward the center. Each of the plurality of joint iron pieces 3 has a second back yoke portion 7B arranged on the outer periphery of the annular stator 200. A bent portion 6 is formed at the boundary between each magnetic pole piece 2 and each joint iron piece 3.

Here, the first back yoke portion 7A of the magnetic pole piece 2 and the second back yoke portion 7B of the joint iron piece 3 are distinguished, but the first back yoke portion 7A and the second back yoke portion are distinguished. It is continuous with 7B.

As shown in FIG. 5B, each bent portion 6 is formed by a notch 6A and a thin portion 9 that open inward in the radial direction of the stator 200, respectively. The opening 6B of each notch 6A is formed in a tapered shape that widens toward the teeth portion 8 side in a state where the stator core 1 is developed in a straight line before bending. Further, each notch 6A has a circular opening 6D continuous with the tapered opening 6B, and has a keyhole shape as a whole. A bending center point 6C for bending the stator core 1 toward the teeth portion 8 is formed on the thin portion 9 side of the circular opening 6D of each notch 6A. Then, the stator core 1 is bent inward in the radial direction about each bending center point 6C to form an annular shape.

Conventionally, there are the following two methods for winding an electric wire around each tooth portion 8. One is a method in which the stator core 1 to which the bus bar assembly 51 is assembled is bent so that each tooth portion 8 is radially outward, and an electric wire is wound around each tooth portion 8, as shown in FIG. The other is a method in which an electric wire is wound around each tooth portion 8 in a state where the stator core 1 to which the bus bar assembly 51 is assembled is unfolded in a straight line.

After that, the stator core 1 around which the coil 120 is wound via the bus bar assembly 51 is bent so that each tooth portion 8 is radially inward to form an annular stator 200. Hereinafter, bending so that each tooth portion 8 is radially outward is referred to as "bending in the opposite direction", and bending so that each tooth portion 8 is radially inward is referred to as "bending in the forward direction". .. Making each tooth portion 8 into a straight line is called "developing in a straight line".

7A to 7C are views showing a bent state of the stator core 1 according to the first embodiment. FIG. 7A shows a state in which the stator core 1 is linearly deployed. FIG. 7B shows a state in which the stator core 1 is bent in the opposite direction. FIG. 7C shows a state in which the stator core 1 is bent in the positive direction.

In FIG. 7A, let P1 be the pitch of each bending center point 6C of each bending portion 6 formed at both ends of one joint iron piece 3. Similarly, the pitch of each bending center point 6C in FIG. 7B is P2, and the pitch of each bending center point 6C in FIG. 7C is P3. Further, in FIG. 7A, the pitch between the outer end 6E of the notch 6A formed on one end side of one joint iron piece 3 and the outer end 6F of the notch 6A formed on the other end side is Q1. And. Similarly, let the pitch of the

ends

6E and 6F of each notch 6A in FIG. 7B be Q2, and let the pitch of the

ends

6E and 6F of each notch 6A in FIG. 7C be Q3.

In FIGS. 7A to 7C, the pitch of each bending center point 6C does not change. Therefore, P1, P2 and P3 are the same. On the other hand, the pitch Q2 of FIG. 7B is longer than the pitch Q1 of FIG. 7A. Then, the pitch Q3 of FIG. 7C is smaller than the pitch Q1 of FIG. 7A.

FIG. 8 is a plan view showing a region around which an electric wire is wound around the stator core 1. The coil 120 is formed by winding the electric wire in the region 12 shown by the diagonal line in FIG. Further, a frame of a rotary electric machine (not shown) is arranged on the radial outer side of the core back 13 of the stator core 1 which constitutes the outer peripheral surface of the annular stator 200 on the radial outer side. Therefore, when the stator core 1 forms an annular shape, the bus bar 5 needs to be arranged at a position where each terminal 5A does not protrude radially outward from the core back 13. Therefore, as shown by the alternate long and short dash line in FIG. 9, the conventional bus bar 5C is arranged at a position radially inside the bending center C of the stator core 1 and radially outside the region 12 of the teeth portion 8. It had been. The shaded area in the drawing shows the insulator 4.

At the position of the conventional bus bar 5C, the bus bar 5C does not overlap with each bending center point 6C of the stator core 1. Therefore, in the step of bending the stator core 1, the bus bar 5C cannot be easily bent. Then, when the bus bar 5C is bent, the bus bar 5C is greatly expanded and contracted. In addition, when the bus bar 5C is bent, the position of the bus bar 5C may shift. If the position of the bus bar 5C is deviated, the electric wire and each terminal 5A of the bus bar 5C may interfere with each other when the electric wire is wound around each tooth portion 8.

Therefore, as shown in FIG. 9, in the present embodiment, a plurality of bent portions 14 are formed on the bus bar 5. The bus bar 5 is arranged along the longitudinal direction of the stator core 1. Then, each bent portion 14 of the bus bar 5 is arranged in a state of being insert-molded in the insulator 4 so as to overlap the bending center point 6C of each bent portion 6 of the stator core 1. As a result, as shown in FIG. 10, when each bent portion 6 of the stator core 1 is bent, each bent portion 14 of the bus bar 5 is bent together.

As described in the description of FIGS. 7A to 7C, the pitches P1 to P3 of the two bending center points 6C formed at both ends of one magnetic pole piece 2 do not change even when the stator core 1 is bent. Therefore, if the bent portions 14 of the bus bar 5 are arranged so as to overlap each bending center point 6C of the stator core 1, the bus bar 5 can be bent without causing a large expansion and contraction when the stator core 1 is bent.

As described above, according to the stator 200 of the first embodiment, the linear bus bar 5 and the insulator 4 are integrated and assembled to the linear stator core 1. At this time, the stator core 1 is assembled so that the bending center points 6C of the stator core 1 and the bending portions 14 of the bus bar 5 overlap each other. After that, the stator core 1 and the bus bar 5 are integrally bent and formed into an annular shape. The amount of expansion and contraction of the bus bar 5 when the bus bar 5 is bent can be reduced, and an increase in the internal resistance of the bus bar 5 can be suppressed. As a result, the efficiency of the rotary electric machine can be improved. Further, by superimposing each bent portion 14 of the bus bar 5 on the position of each bending center point 6C of the stator core 1, each terminal 5A of the bus bar 5 can be arranged so as to be moved inward in the radial direction of the stator core 1. Therefore, the outer diameter of the stator 200 can be reduced, and the rotary electric machine can be miniaturized.

Next, the manufacturing method of the stator 200 of the first embodiment will be briefly described. FIG. 11 is a diagram showing a manufacturing flow of the stator 200.

First, the electromagnetic steel sheet is punched in step 1 (ST1), and a plurality of electromagnetic steel sheets are laminated to form a linear stator core 1.
Next, in step 2 (ST2), the bus bar 5 and the insulator 4 are previously integrated by insert molding and attached so that each bent portion 14 of the bus bar 5 overlaps the position of each bent portion 6 of the stator core 1.
Next, in step 3 (ST3), each bent portion 6 of the stator core 1 is bent in the opposite direction together with the bus bar 5 and the insulator 4 integrated by insert molding.
Next, in step 4 (ST4), an electric wire is wound around each tooth portion 8 via an insulator 4 to form a coil 120.
Next, in step 5 (ST5), each bent portion 6 of the stator core 1 is bent in the positive direction to form an annular shape. With the above, the stator 200 is completed. The work of winding the electric wire around each tooth portion 8 may be performed in a state where the stator core 1 is developed in a straight line. In this case, since the stator core 1 is not bent in the opposite direction in order to wind the electric wire, the metal fatigue of the bus bar 5 can be reduced, and the work can be reduced by one.

Embodiment 2.
FIG. 12 is a plan view showing the stator 200 according to the second embodiment of the present invention in a linearly developed state before the electric wire is wound. FIG. 13 is a diagram showing three portions of the joint iron piece of FIG. 14A and 14B are a perspective view and a plan view of the bus bar of FIG. In the stator 200 of the second embodiment, the bus bar 5 is different from the stator 200 of the first embodiment. Since other configurations are the same as those in the first embodiment, detailed description thereof will be omitted.

As shown in FIGS. 13 and 14A, the bus bar 5 used in the stator 200 of the second embodiment has a convex portion 15 at a position corresponding to each joint iron piece 3 of the stator core 1. As shown in FIG. 14B, each convex portion 15 is formed by three bent portions 16A to 16C, respectively. Then, as shown in FIG. 15, of the three bent portions 16A to 16C, the bent portion 16B and the bent portion 16C are located at the bent portion 6 of the stator core 1.

Each convex portion 15 deforms when the bus bar 5 is bent, and absorbs a force that tries to expand and contract the bus bar 5. For example, as shown by the broken line in FIG. 15, when the stator core 1 is bent outward in the radial direction, the bent portions 16A to 16C are further bent to absorb the force for contracting the bus bar 5. On the other hand, when the stator core 1 is bent inward in the radial direction, the bent portions 16A to 16C expand to absorb the force for extending the bus bar 5.

As described above, the stator 200 of the second embodiment has a convex portion 15 at a position corresponding to each joint iron piece 3 of the stator core 1 of the bus bar 5. Then, when the stator core 1 is bent, the three bent portions 16 of each convex portion 15 are bent or expanded to absorb the force for expanding and contracting the bus bar 5. As a result, the amount of expansion and contraction of the bus bar 5 can be reduced, and an increase in the internal resistance of the bus bar 5 can be suppressed. Further, when the stator core 1 is bent, the position of the bus bar 5 can be prevented from being displaced, and the quality of the stator 200 can be stabilized.

In the present embodiment, the convex portion has a shape that is convex outward in the radial direction, but the shape of the convex portion is not limited to this. For example, the shape of the convex portion may be a shape that is convex inward in the radial direction, or a plurality of convex portions may be continuously formed. Further, in the second embodiment, the shape of the convex portion is triangular, but as shown in FIG. 16, the convex portion may be arcuate.

Embodiment 3.
FIG. 17 is a partial plan view showing the stator 200 according to the third embodiment of the present invention in a linearly unfolded state before the electric wire is wound. FIG. 18A is a plan view of the stator 200 of FIG. FIG. 18B is a perspective view of the stator 200 of FIG. 18A. In the present embodiment, the range covering the bus bar 5 of the insulator is different from that of the first embodiment. Since other configurations are the same as those in the first embodiment, detailed description thereof will be omitted.

As shown in FIGS. 17, 18A and 18B, in the present embodiment, the magnetic pole piece 2 side from each bent portion 14 of the bus bar 5 is covered with an insulating material to form the insulator 4.

With this configuration, when the stator is formed into an annular shape, the magnetic pole piece 2 side is fixed by the insulator 4 from each bent portion 14, so that the bus bar 5 can be stably bent at each bent portion 14. Can be done. Therefore, the shape variation due to the bending of the bus bar 5 can be suppressed, and the variation in the bending position can also be suppressed.

Embodiment 4.
FIG. 19 is a plan view showing the stator according to the fourth embodiment of the present invention in a linearly developed state before the electric wire is wound. 20A to 20C are plan views showing a bent state of the stator 200 of FIG. In the present embodiment, the range covering the bus bar 5 of the insulator 4 is different from that of the first embodiment. Further, the bus bar 5 of the present embodiment is different from the first embodiment in that it does not have a bent portion 14. Since other configurations are the same as those in the first embodiment, detailed description thereof will be omitted.

As shown in FIG. 20A, in the present embodiment, the bus bar 5 is arranged on the teeth portion 8 side of the position of the bending center point 6C of the stator core 1. Further, the boundary portion 20 which is the boundary between the insulator 4 covering the bus bar 5 and the portion where the bus bar 5 is exposed from the insulator 4 is separated from the bent portion 6 toward the magnetic pole piece 2. There is. As a result, as shown in FIG. 20B, when the stator core 1 is bent radially outward, the bus bar 5 moves radially outward of the stator core 1. On the other hand, as shown in FIG. 20C, when the stator core 1 is bent inward in the radial direction, the bus bar 5 moves inward in the radial direction of the stator core 1.

According to the stator 200 configured in this way, the process of forming the bus bar 5 independently in an annular shape can be reduced, and the processing cost of the rotary electric machine can be reduced. Further, the amount of expansion and contraction of the bus bar 5 can be reduced, and an increase in the internal resistance of the bus bar 5 can be suppressed. Therefore, the efficiency of the rotary electric machine can be improved. Further, the bus bar 5 can be arranged on the innermost side in the radial direction of the stator core 1. As a result, the diameter of the stator core 1 can be reduced, and the size of the rotary electric machine can be reduced.

Embodiment 5.
FIG. 21 is a cross-sectional view taken along the axial direction of the rotary electric machine using the stator 200 according to the fifth embodiment of the present invention. In this example, the rotary machine is a pump. In the figure, the portion hatched by the diagonal line is the molded resin portion 601 molded with resin. The rotor portion 608 located inside the stator 200 is not molded.

The mold resin portion 601 covers all of the coil 120, and also covers all of the plurality of magnetic pole pieces 2 and the plurality of joint iron pieces 3. Further, the bus bar 602 connecting the coil 120 wound around the magnetic pole piece 2 is also covered with resin by molding.

FIG. 22 is a cross-sectional view taken along the line XXII-XXII of the stator 200 constituting the rotary electric machine of FIG. 21. In the figure, the portion indicated by the diagonal line is the mold resin portion 601. In FIG. 22, the stator 200 covered by the mold resin portion 601 is shown through the mold resin portion 601.

FIG. 23 is a partially enlarged view of the stator 200 of FIG. 22. As shown in the figure, the bus bars 602 and 604 are arranged in the vicinity of the cylindrical frame 605 that covers the outer periphery of the stator 200. Therefore, for example, when the pump vibrates and the bus bars 602 and 604 move, the bus bars 602 and 604 touch the frame 605 and become conductive, which may cause a problem in the operation of the pump.

In the stator 200 of the fifth embodiment, the bus bars 602 and 604 are covered by the mold resin portion 601. Therefore, as shown in the region B and the region C shown by the alternate long and short dash line in FIG. 23, the resin is filled between the bus bars 602 and 604 and the frame 605. As a result, even when the pump vibrates, it is possible to prevent the bus bars 602 and 604 from coming into contact with the frame 605 and conducting conduction.

Further, the heat of the bus bars 602 and 604 generated when the coil 120 is energized is dissipated through the mold resin portion 601. Therefore, it is not necessary to increase the heat capacity of the magnetic pole piece 2, and the stator 200 can be miniaturized.

The mold resin portion 601 also covers the entire coil 120. Therefore, the insulating property of the coil 120 can be improved.

For molding of the mold resin portion 601, for example, PPS resin (polyphenylene sulfide resin), POM resin (polyacetal resin), and EP resin (epoxy resin) are used.

FIG. 24 is a cross-sectional view showing a first modification of the stator 200 of the fifth embodiment. In FIG. 24, the stator 200 covered by the mold resin portion 606 is shown through the mold resin portion 606.

In this example, the mold resin portion 606 covers the core back 13 side of the plurality of magnetic pole pieces 2 and the plurality of joint iron pieces 3. Therefore, the heat of the bus bars 602 and 604 generated when the coil 120 is energized can be efficiently dissipated through the mold resin portion 606.

Further, in this example, the amount of resin used for molding the mold resin portion 606 can be reduced. Therefore, the price of the pump as a product can be suppressed. Further, in this example, the gap 607 between the adjacent magnetic pole pieces 2 is not covered with the resin. Therefore, the flow rate of the fluid passing through the pump can be increased.

FIG. 25 is a cross-sectional view showing a second modification of the stator of the fifth embodiment. In FIG. 25, the stator 200 covered by the mold resin portion 606 is shown through the mold resin portion 606. In this example, in addition to the first modification of FIG. 24, the coil 120 is covered with resin. Therefore, the heat generated when the coil 120 is energized can be efficiently dissipated through the mold resin portion 606.

1 stator core, 2 magnetic pole pieces, 3 joint iron pieces, 4 insulation, 5 busbars, 6 bent parts, 6A notches, 6B openings, 6C bending center points, 6D openings, 7A first back yoke parts, 7B second Back yoke part, 8 teeth part, 9 thin wall part, 10 joint convex part, 11 joint concave part, 12 area, 13 core back, 14 bent part, 15 convex part, 16A to 16C bent part, 20 boundary part, 51 busbar assembly , 120 coil, 200 stator, 601,606 mold resin part, 602,604 bus bar, 605 frame, 607 gap, 608 rotor part.

Claims

With multiple magnetic pole pieces,
A joint iron piece provided between the adjacent magnetic pole pieces and
The coil wound around the magnetic pole piece and
An insulator provided between the magnetic pole piece and the coil,
It is provided with a bus bar through which the coil is passed between the magnetic pole piece of one of the plurality of magnetic pole pieces and the other magnetic pole pieces.
A stator in which the magnetic pole piece and the joint iron piece are foldably connected at a thin wall portion, and the bus bar is foldably arranged together with the thin wall portion.
The bus bar is arranged at a position overlapping the bending center point of each of the bending portions.
The stator according to claim 1.
The bus bar has a bent portion at a portion corresponding to each of the bent portions.
The stator according to claim 2.
The bus bar further has at least one bent portion between the bent portion on one end side and the bent portion on the other end side at a portion corresponding to each of the joint iron pieces.
The stator according to claim 3.
A part of the portion corresponding to each of the magnetic pole pieces of the bus bar is covered with an insulating material.
In the bus bar, a portion corresponding to each of the joint iron pieces and a portion corresponding to each of the bent portions are exposed from the insulator.
The stator according to any one of claims 1 to 4.
A part of the portion corresponding to each of the magnetic pole pieces of the bus bar is covered with an insulating material.
The bus bar is a portion corresponding to each of the joint iron pieces, a portion corresponding to each of the bent portions, and a portion corresponding to each of the bent portions to a position separated by a predetermined distance on each magnetic pole piece side. Is exposed from the insulation,
The stator according to claim 1.
The bus bar is integrated with the insulation to form a bus bar assembly.
The busbar assembly is assembled to the stator core.
The stator according to claim 5 or 6.
The stator core is bent at each of the bent portions, and the stator core is bent.
The bus bar is bent along the stator core and
The stator core and the bus bar are formed in an annular shape.
The stator according to claim 7.
A rotary electric machine having the stator according to claim 8.
It has a plurality of magnetic pole pieces having a first back yoke portion and a teeth portion, and the same number of joint iron pieces as the plurality of magnetic pole pieces having a second back yoke portion, and the magnetic pole pieces and the joint iron pieces are alternately connected. A step of forming a linear stator core by laminating a plurality of electromagnetic steel sheets which are arranged and in which each of the magnetic pole pieces and each of the joint iron pieces are connected by a thin-walled portion in which a bent portion is formed.
A step of attaching a linear bus bar along the longitudinal direction of the stator core and at a position overlapping each of the bent portions.
A step of winding an electric wire around each of the teeth portions of the plurality of magnetic pole pieces to form a coil, and
It includes a step of bending each of the bent portions of the stator core and bending the bus bar along the stator core to form an annular shape.
How to manufacture the stator.
The step of attaching the linear bus bar along the longitudinal direction of the stator core and at a position overlapping each of the bent portions is
This is a step of attaching the linear bus bar at a position overlapping each bending center of each of the bending portions.
The method for manufacturing a stator according to claim 10.
The linear bus bar is integrated with the insulation.
The method for manufacturing a stator according to claim 10 or 11.
The stator core is composed of multiple magnetic pole pieces,
A method for manufacturing a stator that secures insulation between a frame surrounding the outer periphery of the stator core and the bus bar by covering the coil wound around the plurality of magnetic pole pieces and a bus bar connected to the coil with a resin.
The stator core is composed of multiple magnetic pole pieces,
By covering the plurality of magnetic pole pieces and the core back side of the bus bar connected to the coil wound around the plurality of magnetic pole pieces with resin, insulation between the frame surrounding the outer periphery of the stator core and the bus bar is ensured. How to manufacture the stator.
A stator core composed of multiple magnetic pole pieces and
A coil wound around the plurality of magnetic pole pieces and
With the bus bar connected to the coil
It has the plurality of magnetic pole pieces and a resin that covers the bus bar.
A stator that dissipates heat generated in the bus bar through the resin.