JP2013110889A - Stator mounting method of rotary electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stator mounting method of a rotary electric machine, capable of easily mounting a plurality of split core pieces and routing a coil conductor without increasing the number of components.SOLUTION: The lead-out position of a neutral point side lead-out part 5Dn and the lead-out position of a power supply side lead-out part 5Du are set in a first split core piece 8-1. After carrying out winding of the coil conductor 5, routing of the power supply side lead-out part 5Du, and routing of the neutral point side lead-out part 5Dn for the first split core piece 8-1, together with winding of the coil conductor 5, routing of lead-out parts 5Dn (5Du, 5Dv, 5Dw) extending over the split piece 8-1 or the like for which winding and routing of the coil conductor 5 are completed is carried out for split core pieces from the second split piece on 8-2, 8-3,....

Description

  The present invention relates to a method for assembling a stator for a rotating electrical machine used for vehicle driving, regenerative power generation, and the like, and more particularly to a method for assembling a stator for a rotating electrical machine in which a plurality of coil windings are wound around an annular stator.

  As a method of assembling this type of stator, a plurality of coil winding portions around which a coil conducting wire is wound, and a locking portion that locks a drawing portion of the coil conducting wire drawn from each coil winding portion on an annular stator core The coil conductors are sequentially wound around the coil winding portions, and the lead-out side and the neutral point side lead-out portions of the coil conductors are appropriately wound around the locking portions from a predetermined position on the stator. What is pulled out to the outside is known (see, for example, Patent Document 1).

Japanese Patent No. 4275458

  However, in the above conventional stator assembling method, it is necessary to provide a locking portion for winding the coil conductor lead-out portion around the stator core, and there is a problem that the number of parts increases.

  Further, in the above conventional stator assembling method, it is necessary to wind the coil conductor drawing portion around the retaining portion after the coil conducting wire is wound around each coil winding portion, and the drawing work of the drawing portion becomes complicated. In particular, when the stator core is composed of a plurality of divided core pieces in order to facilitate the winding work of the coil conductors and increase the space factor, the lead portions of the coil conductors are routed while assembling the divided core pieces. It is necessary to carry out extremely complicated work.

  Accordingly, the present invention is intended to provide a method of assembling a stator of a rotating electrical machine that can easily assemble a plurality of divided core pieces and route coil conductors without increasing the number of parts.

In the method of assembling a stator for a rotating electrical machine according to the present invention, the following configuration is adopted in order to solve the above problems.
In the invention according to claim 1, a coil conductor (for example, the coil conductor 5 of the embodiment) is wound around each of the plurality of divided core pieces (for example, the divided core piece 8 of the embodiment), and the plurality of divided core pieces are annularly formed. And pulling out the lead portions (for example, the lead portions 5Du, 5Dv, 5Dw of the embodiment) of the coil conductors drawn from the respective divided core pieces in one place for each phase, A method for assembling a stator that draws out a neutral point side lead portion (for example, 5Dn of the embodiment) of a coil lead wire drawn out from a split core piece in one place, the stator diameter of each split core piece While providing a coil winding part (for example, the coil winding part 10a of the embodiment) in the area corresponding to the inner side in the direction, the area corresponding to the outer side in the radial direction of the stator of each of the divided core pieces, The conductor guide grooves on the power supply side for each phase (for example, the guide grooves 15u, 15v, 15w of the embodiment) that form an annular groove when the stator assembly is completed, and the neutral that forms the annular groove when the stator assembly is completed A point-side conductive wire guide groove (for example, the guide groove 15n of the embodiment), the coil wire is wound around the coil winding portion of the first split core piece, and the neutral point side of the coil wire is Bend the lead-out portion by bending the lead-out portion in the radial direction from the inside of the conductor guide groove on the neutral point side on the same split core piece, and pull out the lead-out portion on the power supply side of the coil conductor on the power supply side of the corresponding phase on the same split core piece. For the second and subsequent divided coil pieces, the coil conductor is wound around the coil winding portion of the divided core piece to be operated, and the divided core piece is First coil winding Is characterized in that the drawer is adjacent to another split coil pieces have completed arranging.
As a result, the coil conductor wire wound around the first split core piece has a neutral portion side lead portion and a power feeding side lead portion in the radial direction at the lead position in the lead guide groove on the same split core piece. It is bent outward and pulled out. At this time, the coil lead wire on the first split core piece is tied in the lead guide groove corresponding to the lead portion on the neutral point side and the lead portion on the power feeding side.

According to a second aspect of the present invention, in the method of assembling the stator of the rotating electrical machine according to the first aspect, with respect to the routing of the lead portion on the neutral point side of the coil wire wound around the second and subsequent divided coil pieces, The lead-out portion on the neutral point side of the coil conductor wound around the split core piece that performs the work is aligned with the neutral point side lead guide groove between the split core piece that performs the work and the first split core piece. Then, the lead portion is drawn to the drawing position on the first split core piece, and the lead portion is drawn on the first split core piece, and the lead portion on the neutral point side of the coil conductor on the first split core piece side. It is characterized by being bent and pulled out radially outward along the bent lead-out portion.
As a result, the coil conductor wire wound around the second and subsequent split core pieces has a lead-out portion on the neutral point side through the conductor guide groove in the middle and radially outward at the pull-out position on the first split core piece. It is bent and pulled out.

According to a third aspect of the present invention, in the method of assembling a stator for a rotating electrical machine according to the second aspect, the stator is an n-phase stator, and the pull-out position of the lead-out portion on the power feeding side of the coil conductor wire of each phase is From the first divided core piece, set in the lead guide groove of the corresponding phase on any one of the divided core pieces counted from the first divided core piece to the nth divided core piece, Regarding the routing of the lead-out portion on the power supply side of the coil conductor wound around the second and subsequent split coil pieces, the n-th lead-out portion on the power supply side of the coil conductor wound around the split core piece performing the work is arranged. Up to the pulling position on any one of the split core pieces up to and including the lead guide groove between them, the pulling portion is bent radially outward at the pulling position and pulled out It is intended to.
As a result, the coil conductors wound around the second and subsequent split core pieces have the lead-out portions on the power supply side routed around the corresponding wire guide grooves in the middle, and up to the nth split core. It is drawn out by bending outward in the radial direction at a drawing position on any one of the divided core pieces.

  The invention according to claim 4 is the method of assembling the stator of the rotating electrical machine according to any one of claims 1 to 3, wherein the lead-out portion on the neutral point side of the coil conductor wound around each divided core piece is It is characterized in that the inside of the neutral point side conductor guide groove is routed in such a direction that the length of the conductor on the annular groove formed by the conductor point guide groove on the neutral point side becomes shorter.

  According to a fifth aspect of the present invention, in the method of assembling a stator for a rotating electrical machine according to any one of the first to fourth aspects, the coil conductor is constituted by a flat wire.

  According to the first aspect of the present invention, the winding of the coil conductor around the first divided core piece and the drawing out from the predetermined positions of the lead portions on the power feeding side and the neutral point side of the coil conductor are divided into the same parts. Since the second and subsequent divided core pieces are assembled on the core piece alone, it is possible to easily assemble a plurality of divided core pieces and route the coil conductors without increasing the number of parts. it can.

  According to the second aspect of the present invention, after the coil conductor is wound around the second and subsequent divided core pieces, the coil lead wire on the neutral point side is already wound and routed. Since it spans the conducting wire guide groove on the other divided core piece that has been completed, it is possible to easily assemble a plurality of divided core pieces and route the coil conducting wire.

  According to the invention of claim 3, after the coil conductor is wound around the second and subsequent divided core pieces, the winding and routing of the lead portion on the power feeding side of the coil conductor has already been completed. Because it can be routed using only the conductor guide groove of the divided core piece itself that is working across or without straddling the conductor guide groove of the corresponding phase on the other split core piece Assembling of the plurality of divided core pieces and drawing of the coil conductor can be easily performed.

  According to the invention of claim 4, the lead portion on the neutral point side of each coil lead is routed in a direction in which the lead length on the annular groove formed by the lead guide groove on the neutral point side is shortened. Therefore, it is possible to further reduce the overlap of the lead portions on the neutral point side of the coil conductors and to shorten the length of the lead portions.

  According to the fifth aspect of the present invention, since the coil conducting wire is constituted by a flat wire, the coil conducting wire can be efficiently arranged without a gap in the coil winding portion and the conducting wire guiding groove on each divided core piece. The lead portion of the coil conductor can be bent easily and accurately from the inside of the conductor guide groove to the outside in the radial direction.

1 is a perspective view of a part of a stator incorporated in a rotating electrical machine according to an embodiment of the present invention. It is a perspective view of a part of a stator core unit of a stator according to an embodiment of the present invention. It is a partial front view of the electric motor which shows the state which assembled | attached the stator of one Embodiment of this invention to the housing. It is a perspective view which decomposes | disassembles and shows the split core piece of the stator core of one Embodiment of this invention. It is a perspective view which shows a part of insulator of the split core piece of one Embodiment of this invention. It is a perspective view of the division | segmentation core piece which wound the coil conducting wire of one Embodiment of this invention. It is sectional drawing corresponding to the AA cross section of FIG. 6 of the insulator of one Embodiment of this invention. The figure which described together the typical partial cross section front view (A) of the stator core which shows routing of the coil conducting wire of the U phase electric power feeding side of one Embodiment of this invention, and the figure which expanded the part (B) is there. The figure which described together the typical partial cross section front view (A) of the stator core which shows routing of the coil conducting wire of the V phase electric power feeding side of one Embodiment of this invention, and the figure which expanded the part (B) is there. The figure which combined the typical partial cross section front view (A) of the stator core which shows routing of the coil conducting wire of the W phase electric power feeding side of one Embodiment of this invention, and the figure which expanded the part (B) is there. 1 is a schematic partial cross-sectional front view (A) of a stator core showing the routing of coil conductors on the midpoint side of each phase of the U phase, V phase, and W phase of an embodiment of the present invention, and an enlarged view of a part thereof It is the figure which described (B) together. It is a typical front view of a stator core showing the routing of the whole coil conducting wire of each phase of U phase, V phase, and W phase of one embodiment of this invention. It is a front view which shows the assembly | attachment method of the division | segmentation core piece of one Embodiment of this invention to (A)-(D) in order. It is a front view of the stator core which shows the assembly | attachment order of the split core piece of one Embodiment of this invention. It is a front view of the stator of one Embodiment of this invention.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing a stator 1 incorporated in the rotating electrical machine of this embodiment, FIG. 2 is a diagram showing a single stator core 2 of the stator 1, and FIG. 3 is a diagram showing the stator 1 together with a terminal block 3 in a housing 4. It is a figure which shows the assembled state.
The rotating electrical machine of this embodiment is a three-phase AC type rotating electrical machine used for vehicle driving and regenerative power generation of an electric vehicle or a hybrid vehicle, and a rotor (not shown) is rotatably disposed inside the annular stator 1. Has been. The rotor is connected to the axle of the vehicle via a speed reduction mechanism or the like.

The stator 1 includes an annular stator core 2 on which a plurality of coil conductors 5 are mounted by salient pole concentrated winding, and a substantially cylindrical holder 6 into which the stator core 2 is press-fitted and fixed. Power supply terminals 7U, 7V, and 7W of corresponding phases are connected to the power supply side ends of the U-phase, V-phase, and W-phase coil conductors 5 drawn out in FIG.
In this embodiment, the coil conducting wire 5 is a rectangular wire having a horizontally long rectangular cross section.

The stator core 2 is composed of a plurality of divided core pieces 8 that are substantially fan-shaped when viewed from the front, and each coiled wire 5 is wound around each divided core piece 8 individually. One end side of each coil conductor 5 wound around the split core piece 8 is connected to the power supply terminals 7U, 7V, 7W of the corresponding phases collected for each phase, and the other end side of each coil conductor 5 is all Are collected in one place and electrically connected to each other. Therefore, in this stator core 2, the coil conducting wire 5 of each phase is connected by Y connection.
In this embodiment, the divided core pieces 8 include a total of 12 for the U phase, V phase, and W phase, and each of the four phases is the U phase, V phase, and W phase in the circumferential direction. They are arranged in order so that the arrangement is repeated.

FIG. 4 is an exploded perspective view showing components of the split core piece 8.
The divided core piece 8 includes a core main body 9 configured by laminating a plurality of steel plates, and an insulator 10 that is fitted in a peripheral region of the core main body 9 to electrically insulate the core main body 9.

  The core body 9 includes a yoke portion 9 a that forms an arc region on the outer peripheral side of the stator core 2, and a teeth portion 9 b that protrudes inward in the radial direction of the stator core 2 from the inner peripheral side of the yoke portion 9 a. . The yoke portion 9a has a convex portion 11 formed on one end surface in the arc direction, and a concave portion 12 formed on the other end surface. The convex portion 11 and the concave portion 12 are formed in a semicircular shape of the same size, and the convex portion 11 and the concave portion 12 are fitted to each other between the yoke portions 9a of the adjacent divided core pieces 8. Moreover, the insulator 10 is fitted to the outer peripheral surface in the protruding direction of the tooth portion 9 b, and the coil conductor 5 is wound around the outer peripheral side via the insulator 10.

5 is a perspective view showing a part of the insulator 10, FIG. 6 is a perspective view showing a divided core piece 8 around which the coil conducting wire 5 is wound, and FIG. 7 is a cross-sectional view taken along the line AA in FIG. FIG. In these drawings for explaining the split core piece 8 including FIG. 4, the arrows C, R, and Ax indicate the circumferential direction, radial direction, and axial direction of the stator core 2, respectively.
The insulator 10 is fitted to the tooth portion 9b of the core body 9, and a coil winding portion 10a around which the coil lead wire 5 is wound, and each coil lead wire 5 wound around the coil winding portion 10a. A lead wire guide portion 10b for drawing the lead-out portions 5Du, 5Dv, 5Dw, and 5Dn on the start end side and the end end side to a predetermined position on the circumference along the circumferential direction of the stator core 2.

  The coil winding part 10a of the insulator 10 is constituted by two parts in which a part fitted to the tooth part 9b of the core body 9 is divided in half in the peripheral area of the tooth part 9b. Here, when one of the two parts is called a first half 13 and the other is called a second half 14, the conductor guide portion 10b is a first half which is one part. It is formed integrally with the split body 13. The first half 13 and the second half 14 are provided with flange portions 13a, 13a, 14a, 14a on both sides along the extending direction (R direction) of the teeth portion 9b, respectively. The coil conductor 5 is wound between the flange portions 13a, 13a, 14a, 14a.

  On the other hand, the conductor guide portion 10b of the insulator 10 is formed as an integral block at a position overlapping one end side in the R direction of the coil winding portion 10a with the arc-shaped side surface of the yoke portion 9a of the core body 9. The block of the conductor guide portion 10b is formed in a substantially arc shape when viewed from the Ax direction in the figure, and four surfaces along the circumferential direction (C direction) of the stator core 2 are formed on the surface corresponding to the outer peripheral surface of the stator core 2. Guide grooves 15n, 15u, 15v, and 15w are formed in four stages in the axial direction (Ax direction). These guide grooves 15n, 15u, 15v, and 15w each form four independent annular grooves when all the divided core pieces 8 are assembled in an annular shape, and each annular groove Inside, the lead portions 5Dn, 5Du, 5Dv, and 5Dw of the coil conductors 5 are respectively routed.

  The groove widths of the guide grooves 15n, 15u, 15v, and 15w of the insulator 10 are set so as to substantially match the length of the long side of the cross section of the coil conducting wire 5 (slightly larger than the length of the long side). . Further, as shown in FIG. 7, the guide grooves 15u, 15v, and 15w are fitted with a maximum of two lead-out portions 5Du, 5Dv, and 5Dw on the power feeding side of the coil conductor 5, whereas the guide grooves 15n Since a maximum of six lead portions 5Dn on the neutral point side of the coil conductor 5 are inserted, the depth of the guide groove 15n is deeper than the other guide grooves 15u, 15v, 15w.

Further, on one end face in the arc direction of the block of the conductor guide portion 10b, as shown in FIGS. 4 and 6, the neutral point side of the coil conductor 5 is inserted into the corresponding guide groove 15n from the coil winding portion 10a side. As shown in FIG. 5, a guide groove 15u corresponding to the coil winding portion 10a side is formed on the other end surface in the arc direction of the same block. , 15v, 15w are formed with lead-out grooves 16u, 16v, 16w for pulling out end portions (lead-out portions 5Du, 5Dv, 5Dw) of the coil conductor 5 on the power feeding side.
4 to 6, reference numeral 17 denotes the block for guiding the end portion (drawing portion 5Dn) on the neutral point side of the coil conducting wire 5 drawn from the coil winding portion 10a to the drawing groove 16n. It is a guide wall provided in the surface facing the coil winding part 10a.

FIG. 8 is a diagram showing the routing of the lead-out portion 5Du on the power feeding side of each U-phase coil conductor 5 on the stator core 2.
As shown in the figure, the lead portion 5 Du of the coil conductor 5 drawn out from the four U-phase split core pieces 8 is drawn to one place on the circumference of the stator core 2 along the guide groove 15 u of the insulator 10. It is turned and bent so as to protrude outward in the radial direction of the stator core 2. The ends (connecting ends 5Eu) of the lead portions 5Du thus bent are bundled together and connected to the corresponding U-phase power supply terminals 7U (see FIGS. 1 to 3) by the fusing process.

FIG. 9 is a diagram showing the routing of the lead-out portion 5Dv on the power supply side of each V-phase coil conductor 5 on the stator core 2, and FIG. 10 is the drawing on the power-feed side of each W-phase coil conductor 5 on the stator core 2. It is a figure which shows routing of part 5Dw.
As shown in these drawings, the lead-out portions 5Dv and 5Dw drawn out from the four divided core pieces 8 for V-phase and W-phase are respectively guide grooves of the insulator 10 as with the U-phase lead-out portion 5Du. It is routed to one place on the circumference of the stator core 2 along 15v and 15w, and is bent so as to protrude outward in the radial direction of the stator core 2 from that place. The end portions (connection ends 5Ev, 5Ew) of the lead portions 5Dv, 5Dw of the V phase and the W phase are bundled together and corresponding to the power supply terminals 7V, 7W by the fusing process (see FIGS. 1 to 3). It is connected to the.

FIG. 11 is a diagram illustrating the routing of the lead-out portion 5Dn on the neutral point side of each of the U-phase, V-phase, and W-phase coil conductors 5 on the stator core 2.
As shown in the figure, the lead-out portion 5Dn on the neutral point side of the coil conductor 5 drawn out from all the divided core pieces 8 is located at one place on the circumference of the stator core 2 along the guide groove 15n of the insulator 10. It is routed and bent so as to protrude radially outward of the stator core 2 from that location. The ends of all the neutral point side lead portions 5Dn are electrically connected to each other and physically connected by the fusing process. The end portions of the neutral point side lead portions 5 </ b> Dn connected to each other in this way constitute a neutral point coupling portion 18.

FIG. 12 is a diagram showing the routing of the lead portions 5Du, 5Dv, 5Dw, and 5Dn of all the coil conductors 5 on the stator core 2 together.
As shown in the figure, the connection ends 5Eu, 5Ev, 5Ew of the U phase, the V phase, and the W phase, and the midpoint connecting portion 18 are drawn from different positions on the circumference of the stator core 2, respectively. These are arranged in regions adjacent to each other on the circumference of the stator core 2.
Specifically, the connection end 5Eu of the U phase is disposed on one end side in the circumferential direction of one split core piece 8-1 of the stator core 2, and the midpoint connecting portion 18 is the same split core piece 8-1. It is arrange | positioned at the other end side of the circumferential direction. The V-phase connection end 5Ev is arranged at the end of the divided core piece 8-2 adjacent to the one end side of the divided core piece 8-1 on the side close to the U-phase connection end 5Eu. The end 5Ew is disposed at the end of the same split core piece 8-2 on the side away from the U-phase connection end 5Eu. In other words, in the case of this embodiment, the connection ends 5Eu, 5Ev, 5Ew and the midpoint connecting portion 18 are collectively arranged in the radially outer region of the two adjacent divided core pieces 8-1, 8-2. Yes.

  By the way, at the end of the lead portion 5Dn on the neutral point side of the coil conductor 5 which is guided by the guide groove 15n of each insulator 10 and is drawn out from one place on the stator core 2, each coil conductor 5 is a flat wire. Thus, the flat surfaces can be brought into surface contact with each other in a state of being bent radially outward. In this way, the middle point connecting portion 18 is configured such that the ends of the plurality of lead portions 5Dn are brought into contact with each other on a flat surface and stacked in layers, and in this state, the end portions of the plurality of lead portions 5Dn are made of a metal binding plate 19 (bundling). And a fusing process together with the member. The binding plate 19 is fixed to each of the drawer portions 5Dn in a state where the peripheral area of the end portion of the plurality of drawer portions 5Dn is held.

  By the way, the stator core 2 configured as described above is fitted into a cylindrical holder 6 and fixedly installed inside the housing 4 as an integral stator 1 as shown in FIGS. A terminal block 3 having a substantially arc shape in plan view is fixedly installed inside the housing 4 so as to be adjacent to a part of the outer peripheral surface of the stator 1.

  The terminal block 3 is formed entirely of an insulating resin material. As shown in FIG. 3, as shown in FIG. 3, the arc-shaped base wall 22 that is substantially orthogonal to the axis of the stator 1, and the arc-shaped inner peripheral side of the base wall 22 And an outer wall 23 that surrounds the three sides except the outer wall 23, and the inner peripheral side of the base wall 22 without the outer wall 23 faces the outer peripheral surface of the stator 1. Therefore, the terminal block 3 forms a concave space surrounded by the base wall 22, the outer wall 23, and the outer peripheral surface of the stator 1 in a state of being fixedly installed in the housing 4 together with the stator 1.

  Further, on the outside of the outer wall 23 of the terminal block 3, a connector (not shown) for connecting an external power supply line is installed. The three-phase terminals U, V, and W of the connector are connected to power supply terminals 7U, 7V, and 7W on the stator 1 side through a three-phase bus bar (metal plate) (not shown) that penetrates the terminal block 3. It has become. One end of each bus bar is disposed on the base wall 22 facing the concave space, and is bolted to the corresponding power supply terminals 7U, 7V, 7W on the base wall 22. In FIG. 3, reference numeral 24 denotes a terminal coupling bolt.

As shown in FIG. 3, the fastening portions between the power supply terminals 7 </ b> U, 7 </ b> V, 7 </ b> W and the corresponding bus bars are spaced apart in the arc direction of the base wall 22. And the fixing | fixed part of the terminal block 3 is provided in the position adjacent to the fastening part of the one end side (lower side in the figure) of the arc direction of the base wall 22, The fixing | fixed part is with the volt | bolt 25 which is a fastening member. It is fastened and fixed to the housing 4.
Further, on the base wall 22, a partition wall for electrically insulating between the fastening portions of the adjacent feeding terminals 7W, 7V, and 7U and between the fastening portion of the feeding terminal 7U and the housing fixing portion (bolt 25). 26a, 26b, and 26c are provided.

  Here, the U-phase, V-phase, and W-phase connection ends 5Eu, 5Ev, and 5Ew projecting outward in the radial direction of the stator 1 are power supply terminals 7U, 7V, and 7W that bend and extend in the axial direction of the stator 1. Are connected to the corresponding bus bars on the base wall 22 of the terminal block 3 by the bolts, but the midpoint connecting portion 18 is not fixed to any part of the space surrounded by the outer wall 23 of the terminal block 3. Protruding. Specifically, the midpoint connecting portion 18 is surrounded by the outer wall 23 of the terminal block 3 and the partition wall 26c, and in the space where the bolt 25 for fixing the terminal block is disposed, It protrudes to a position separated in the direction. Therefore, the midpoint connecting portion 18 protrudes inside the terminal block 3 at a position that overlaps with the installation portion of the bolt 25 in the circumferential direction and is spaced apart in the axial direction on the radially outer side of the stator core 2.

  Next, a method for assembling the stator 1 configured as described above will be described with reference to FIGS.

  First, as shown in FIG. 13A, for example, a first split core piece 8-is formed with a lead-out portion 5 Du on the feeding side of the coil conductor 5 as a start end and a lead-out portion 5 Dn on the neutral point side as a termination. The coil conducting wire 5 is wound around one coil winding portion 10a (see FIG. 6). At this time, the lead-out portion 5Du on the power feeding side and the lead-out portion 5Dn on the neutral point side of the coil conductor 5 are connected to the guide grooves 15u and 15n side of the split core piece 8-1 through the lead-out grooves 16u and 16n shown in FIGS. Pull in.

  The lead-out portions 5Du and 5Dn drawn into the respective guide grooves 15u and 15n are slightly drawn along the corresponding guide grooves 15u and 15n, and in the radial direction at a specific pull-out position in each guide groove 15u and 15n. It is bent outward at a substantially right angle and pulled out. In the case of this illustrated example, the drawing portion 5Du is bent radially outward as the connection end 5Eu at a specific drawing position near the right side in the drawing after being guided in the left direction in the guide groove 15u from the right end side in the drawing. The drawer portion 5Dn is bent radially outward at a specific drawer position closer to the left side in the drawing after the guide groove 15n is made to follow the right direction from the left end side in the drawing.

Next, as shown in FIG. 13 (B), the coil winding portion 10a (see FIG. 6) of the second divided core piece 8-2 as well as the first divided core piece 8-1. Then, the coil conductor 5 is wound, and the lead-out portion 5Dv on the power feeding side and the lead-out portion 5Dn on the neutral point side of the coil conductor 5 are split into the split core piece 8-2 through the lead-out grooves 16v and 16n shown in FIGS. The guide grooves 15v and 15n are pulled in.
In this state, the second divided core piece 8-2 is arranged on the right side of the first divided core piece 8-1 in the drawing, and the lead-out portion 5Dv drawn into the guide groove 15v is in the guide groove 15v. The first split core piece 8-1 is routed along the direction, and is bent substantially perpendicularly outward in the radial direction as a connection end 5Ev at a specific drawing position in the guide groove 15v. In addition, the lead-out portion 5Dn drawn into the guide groove 15n is routed through the guide groove 15n of the first split core piece 8-1 and a specific drawer on the first split core piece 8-1. It is bent at a substantially right angle outward in the position.

Thereafter, as shown in FIG. 13C, the coil winding portion 10a (see FIG. 6) of the third divided core piece 8-3 is similar to the second divided core piece 8-2. Then, the coil conductor 5 is wound, and the lead-out portion 5Dw on the power feeding side and the lead-out portion 5Dn on the neutral point side of the coil conductor 5 are divided into the split core pieces 8-3 through the lead-out grooves 16w and 16n shown in FIGS. To the guide grooves 15w and 15n.
In this state, the third divided core piece 8-3 is further arranged on the right side of the second divided core piece 8-2, and the lead-out portion 5Dw drawn into the guide groove 15w extends into the guide groove 15w. The second split core piece 8-2 is routed along the direction and bent at a specific drawing position in the guide groove 15w as a connection end 5Ew radially outward at a substantially right angle. In the case of the example of FIG. 13C, the lead-out portion 5Dw is bent at a substantially right angle at the right end in the figure in the guide groove 15w on the second divided piece 8-2. On the other hand, the lead-out portion 5Dn drawn into the guide groove 15n is drawn up to the guide groove 15n of the first split core piece 8-1 and a specific drawer in the first split core piece 8-1. It is bent at a substantially right angle outward in the position.

Thereafter, as shown in FIG. 13D, the coil winding portion 10a (see FIG. 6) of the fourth divided core piece 8-4 is similar to the third divided core piece 8-3. The coil conductor 5 is wound around, and the lead-out portion 5Dw on the power feeding side and the lead-out portion 5Dn on the neutral point side of the coil conductor 5 are guided into the guide grooves 15w and 15n of the split core piece 8-4 in the same manner as the third one. Pull to the side.
The fourth divided core piece 8-4 is arranged on the left side of the first divided core piece 8-1 in this state, and the drawing portion 5Dw drawn into the guide groove 15w is divided into the first divided core piece 8-1. Connected at a specific lead-out position in the guide groove w on the second divided core piece 8-2 by being routed in the guide groove 15w of the core piece 8-1 and the second divided core piece 8-2. 5Ew is bent substantially perpendicularly outward in the radial direction. Further, the lead-out portion 5Dn drawn into the guide groove 15n is routed to a specific lead-out position in the guide groove 15n on the first split core piece 8-1 where it is bent at a substantially right angle outward in the radial direction. It is done.

Similarly, for example, the coil conductor 5 is wound and routed around the remaining divided core piece 8 in the order as shown in FIG.
When winding and routing of the coil conductor 5 with respect to the split core piece 8 are sequentially performed in this way, the adjacent split core pieces 8 are mutually restrained by the lead portion of the coil conductor 5. However, when the divided core pieces 8 are assembled in the order shown in FIG. 14, the divided core piece 8 assembled in the (11) th and the divided core piece 8 assembled in the (12) th are not constrained to each other. However, since these divided core pieces 8 are constrained by other divided cores 8 adjacent on the opposite side, there is no fear of dropping after assembly.

As shown in FIG. 15, the annular block of the assembled divided core piece 8 is press-fitted into the substantially cylindrical holder 6, and the lead-out ends of the U, V, and W phases are gathered to correspond to each other. Coupled to the terminals 7U, 7V, and 7W, the leading end on the neutral point side is bound by the above-described fusing process.
In addition, the assembly | attachment order of the split core piece 8 is not restricted to what is shown in FIG. 14, It can change suitably except the order of (1), (2), (3) in FIG.

  In addition, the direction of routing of the coil conductor 5 on the guide grooves 15n, 15u, 15v, and 15w of each divided core piece 8 can be changed as appropriate. In particular, as shown in FIG. It is desirable that the lead-out portion 5Dn on the neutral point side is drawn in a direction in which the lead-out length on the annular groove formed by the guide groove 15n on the neutral point side is shortened. In this embodiment, as shown in FIG. 11, six (half number) divided core pieces arranged on the right side with respect to the drawing position (middle point connecting portion 18) of the drawing portion 5Dn on the neutral point side. 8 and the drawing direction 5Dn of the six (half number) divided core pieces 8 arranged on the left side are set in the reverse direction. For this reason, the number of coil conducting wires accommodated in the guide groove 15n of the split core piece 8 is suppressed to a maximum of six.

  In the stator assembling method as described above, the coil conductor 5 is wound around the first divided core piece 8-1, the lead-out portion 5Du is routed, and the neutral point side is pulled out. After the part 5Dn is routed, the coil conductor 5 has already been wound and routed together with the coil conductor 5 for the second and subsequent divided core pieces 8-2, 8-3,. In order to route the lead-out portions 5Dn (5Du, 5Dv, 5Dw) straddling the divided pieces 8-1 and the like, assembly of the plurality of divided core pieces 8 and coil conductors are not required without adding special parts or complicated work. Can be easily and reliably performed.

  In particular, in this embodiment, since a rectangular wire is used as the coil conducting wire 5, the coil conducting wire 5 is placed in the coil winding portion 10a and the guide grooves 15n, 15u, 15v, and 15w on each divided core piece 8 without a gap. In addition to being able to arrange efficiently, the lead portions 5Dn, 5Du, 5Dv, and 5Dw of the coil conductor 5 can be easily and accurately bent radially outward from the inside of the guide grooves 15n, 15u, 15v, and 15w. .

  Further, as in this embodiment, the lead portion 5Dn on the neutral point side of the coil conductor 5 is routed in a direction in which the lead length on the annular groove formed by the guide groove 15n on the neutral point side is shortened. In this case, the length of the lead portion 5Dn can be shortened, and the overlapping amount of the lead portion 5Dn in the guide groove 15n can be reduced. For this reason, the depth of the guide groove 15n can be reduced to facilitate the manufacture of the insulator 10, and the weight balance on the circumference of the stator 1 can be improved.

  In addition, this invention is not limited to said embodiment, A various design change is possible in the range which does not deviate from the summary.

5 ... Coil conductor 5Du, 5Dv, 5Dw ... Drawer (drawer on the power feeding side)
5Dn ... drawer part (neutral part drawer part)
8 ... Divided core piece 10a ... Coil winding part 15u, 15v, 15w ... Guide groove (conductive wire guide groove on the power feeding side)
15n ... Guide groove (conductor guide groove on the neutral point side)

Claims (5)

A plurality of divided core pieces are wound around each of the plurality of divided core pieces, the plurality of divided core pieces are assembled in a ring shape, and a lead-out portion on the power feeding side of the coil conductor drawn from each of the divided core pieces is provided at one location for each phase. A method of assembling a stator that pulls out the lead portion on the neutral point side of the coil conductor wire drawn out from each of the split core pieces in one place,
A coil winding portion is provided in a region corresponding to the radially inner side of the stator of each divided core piece, and an annular groove is formed in a region corresponding to the radially outer side of the stator of each divided core piece when assembly of the stator is completed. A conductive wire guide groove on the power feeding side for each phase and a conductive wire guide groove on the neutral point side that forms an annular groove when the assembly of the stator is completed,
The coil conductor is wound around the coil winding portion of the first split core piece, and the lead-out portion on the neutral point side of the coil lead wire is radially outward from the neutral point side lead guide groove on the same split core piece. The lead portion of the coil lead wire on the power supply side is bent radially out from the lead wire guide groove on the power supply side of the corresponding phase on the same split core piece,
For the second and subsequent divided coil pieces, the coil conductor is wound around the coil winding portion of the divided core piece to be worked, and the winding and drawing of the coil conductor are completed for the divided core piece first. A method of assembling a stator of a rotating electrical machine, wherein the stator is disposed adjacent to another divided coil piece. For routing of the lead portion on the neutral point side of the coil conductor wound around the second and subsequent divided coil pieces,
The lead-out portion on the neutral point side of the coil conductor wound around the split core piece that performs the work is aligned with the neutral point side lead guide groove between the split core piece that performs the work and the first split core piece. Then, the lead portion is drawn to the drawing position on the first split core piece, and the lead portion is drawn on the first split core piece, and the lead portion on the neutral point side of the coil conductor on the first split core piece side. The method of assembling a stator for a rotating electric machine according to claim 1, wherein the stator is bent and drawn radially outward along the bent lead-out portion. The stator is an n-phase stator;
The lead-out position of the lead-out portion on the power feeding side of the coil conductor wire of each phase is any one of the first divided core piece to the nth divided core piece counted from the first divided core piece. Set in the wire guide groove of the corresponding phase on the split core piece of
For routing of the lead-out portion on the power feeding side of the coil conductor wound around the second and subsequent divided coil pieces,
The lead-out portion on the power feeding side of the coil conductor wound around the split core piece performing the work is inserted into the lead guide groove between the n-th split core pieces up to the pull-out position on any one of the split core pieces. 3. The method of assembling a stator for a rotating electrical machine according to claim 2, wherein the pulling portion is drawn along the drawing direction, and the drawing portion is bent and drawn radially outward at the drawing position.   The neutral lead-out part of the coil lead wire wound around each split core piece has a neutral lead-side guide in a direction in which the lead length on the annular groove formed by the neutral-point lead guide groove decreases. The method of assembling a stator of a rotating electric machine according to any one of claims 1 to 3, wherein the inside of the groove is routed.   The method of assembling a stator for a rotating electric machine according to any one of claims 1 to 4, wherein the coil conducting wire is configured by a rectangular wire.

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