JP2013150503A - Stator of rotary electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a breakage of an insulation coating of a coil conductor wire when welding a bus bar module to a stator coil.SOLUTION: A bus bar end extended part 30 of a bus bar 36 protruded from a body 28 of a bus bar module 26 and a coil conductor wire end extended part 20 extend in a same direction and are disposed so as to be adjacent to each other. Both tips of the coil conductor wire end extended part 20 and the bus bar end extended part 30 are welded (a welded part 48). A holding part 50 is provided in addition, which holds a bus bar module body 28 at a stator 10 in a state where a gap 56 is formed between the bus bar module body 28 and a partial coil 16.

Description

  The present invention relates to a stator of a rotating electrical machine, and more particularly to a structure of a portion related to connection of coil conductors.

  An electric motor that converts electrical energy into rotational kinetic energy, a generator that converts rotational kinetic energy into electrical energy, and an electric device that functions as both the motor and the generator are known. Hereinafter, these electric devices are referred to as rotating electric machines.

  The rotating electrical machine has two members that are arranged coaxially and relatively rotate. Normally, one is fixed and the other rotates. A coil is arranged on a fixed member (stator), and a rotating magnetic field is formed by supplying electric power to the coil. The other member (rotor) is rotated by the interaction with the magnetic field. The coil arranged in the stator is formed, for example, by attaching a plurality of partial coils to the stator and then connecting the partial coils. In order to distinguish between the individual coils before being connected and the entire coil after being connected, the former will be referred to as a partial coil and the latter as a coil group.

  For example, Japanese Unexamined Patent Application Publication No. 2008-301561 (hereinafter referred to as Patent Document 1) discloses a terminal module for a rotating electrical machine that has an object to reduce the manufacturing cost of the rotating electrical machine and to enable mass production. Have been described. The terminal module includes a ring-shaped rail having a groove extending in the circumferential direction, a bus bar fitted in the groove, and a connector portion having a connector terminal for connecting the bus bar and external wiring. It has a phasing hole for phasing rotation around the direction.

JP 2008-301561 A

  When the terminal module described in Patent Literature 1 is welded and connected to the coil mounted on the stator, when the terminal module is in contact with the coil of the stator, the coil conductor portions move and rub against each other. The insulation film may be damaged.

  An object of the present invention is to prevent damage to an insulating film of a coil conductor when a bus bar module is welded to a coil of a stator.

  A stator of a rotating electrical machine according to the present invention includes a plurality of partial coils mounted on a stator core and a plurality of bus bars that connect coil conductors of the partial coils to form a coil group, and the plurality of bus bars are integrated by an insulating member. The bus bar module main body is formed, the ends of the bus bar extend from the two back-to-back sides of the bus bar module main body, and the bus bar module main body is disposed adjacent to the coil group in the rotation axis direction of the rotating electrical machine. The coil conductor has a coil conductor end extending part extending in the rotation axis direction at an end thereof, and the bus bar has a bus bar end extending part extending in the rotation axis direction at an end extending from the bus bar module main body. The coil conductor end extension and the bus bar end extension to be connected are arranged adjacent to each other, and the end of the coil conductor end extension and the bus bar end extension are the same. There are welded, further comprising a support for supporting the bus bar module body to the stator in a state where gaps are formed between the bus bar module main body and the partial coils.

  In the stator of the rotating electrical machine according to the present invention, the support portion is a part of a coil conducting wire constituting the partial coil, and extends from the radially inner side to the radially outer side at the end portion of the partial coil in the rotational axis direction. You may support a bus-bar module main body so that a clearance gap may be formed between a crossing conducting wire part and a bus-bar module main body.

  Further, in the stator of the rotating electrical machine according to the present invention, the bus bar module main body may be formed integrally with an insulating member that covers the periphery of the bus bar except for a bus bar end extending part from a side surface of the bus bar module main body. Good.

  Further, in the stator of the rotating electrical machine according to the present invention, the stator further includes an insulating module cover that covers a welded portion between the ends of the coil conductor end extension portion and the bus bar end extension portion on the outer side in the rotation axis direction. It may be integrally formed as a part of the module cover.

  In the stator of the rotating electrical machine according to the present invention, the coil group includes a plurality of phase coil groups, and the support portion is inserted and held between coil conductors that respectively constitute partial coils included in different phase coil groups. May be supported.

  Furthermore, in the stator of the rotating electrical machine according to the present invention, the end portion in the rotation axis direction of the support portion may be positioned in contact with the end surface in the rotation axis direction of the stator core.

  According to the present invention, since the bus bar module main body is supported by the support portion in a state where a gap is formed between the partial coil, that is, in a non-contact state with the partial coil, the coil conductor end extension portion and the bus bar end extension portion are supported. Even if the bus bar module body is pressed when welding the ends, it does not come into contact with the coil conductors forming the partial coil or coil group, and as a result, the coil conductors rub against each other and damage the insulation coating of the coil conductors. Can be prevented.

  In addition, when the coil is cooled using a cooling fluid such as cooling oil, the cooling fluid can flow through the gap between the bus bar module body and the partial coil, thereby suppressing a decrease in cooling performance for the coil group. Can do.

It is a perspective view which shows the stator of a rotary electric machine. It is a figure which shows the state with which the bus-bar module was attached to the stator. It is a perspective view which shows a bus-bar module alone. It is sectional drawing in the AA line of FIG. 3 of a bus-bar module. It is a figure for demonstrating the division which accommodates a bus-bar. It is a figure which shows the shape in a bus bar, and arrangement | positioning in a bus-bar module. It is a figure which shows the one aspect | mode of the state by which the bus-bar module was supported by the coil. It is a figure which shows a mode that the clearance gap is formed between the bus-bar module and the connecting wire part of a coil. It is a perspective view which shows a module cover. It is a figure which shows the state by which the bus-bar module was supported by the support part integrally formed in the module cover.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments according to the present invention (hereinafter referred to as embodiments) will be described in detail with reference to the accompanying drawings. In this description, specific shapes, materials, numerical values, directions, and the like are examples for facilitating the understanding of the present invention, and can be appropriately changed according to the application, purpose, specification, and the like. In addition, when a plurality of embodiments and modifications are included in the following, it is assumed from the beginning that these characteristic portions are used in appropriate combinations.

  FIG. 1 is a perspective view showing an appearance of a stator 10 of a rotating electrical machine. The stator 10 has an annular or cylindrical stator core 12, and teeth 14 serving as magnetic poles are arranged in the circumferential direction on the inner periphery of the stator core 12. A coil group 18 is mounted on the stator core so that the coil conductor 16 is wound around the teeth 14. In this embodiment, a plurality of coil conductors 16 formed in a predetermined shape are inserted into slots that are spaces between the teeth 14, and the coil conductors 16 are welded together to form a predetermined number of partial coils. ing. And the coil group 18 is formed by connecting the end of the coil conducting wire 16 of the partial coil via a bus bar described later.

  The stator 10 has an annular or cylindrical shape even when the coil group 18 is mounted on the annular or cylindrical stator core 12. Hereinafter, with respect to the shape of the stator and the like, an annulus and a cylinder are referred to as an annulus for simplicity. A rotor (not shown) is disposed inside the annular stator 10. By supplying electric power to the coil group 18, a rotating magnetic field is formed in the space inside the ring of the stator 10, and the rotor rotates by interaction with this magnetic field. The axis of rotation of the rotor is the axis of rotation of the rotating electrical machine, and this axis coincides with the central axis of the ring of the stator 10. In the following description, the rotation axis of this rotating electrical machine, that is, the direction in which the central axis of the ring of the stator 10 extends is referred to as the rotation axis direction.

  As shown in FIG. 1, the ends of the coil conductors protrude upward from the coil group 18 in FIG. 1, that is, in the direction of the rotation axis. An end portion of the coil conducting wire extending from the coil group 18 is referred to as a coil conducting wire end extending portion 20. In the stator 10, two sets of partial coils are provided for each of the U phase, the V phase, and the W phase, and there are a total of 12 coil conductor end extensions 20 that are the ends of the partial coils. The coil conductor wire extended portions 20 are electrically connected to each other at the neutral point side for each phase. Further, a power line 22 for supplying three-phase AC power is connected to each one of the U-phase, V-phase, and W-phase coil conductor end extensions 20. The power line 22 also has a function of sending out the generated electric power to the outside when the electric power is generated by the rotating electrical machine.

  2 and 3 are views showing a bus bar module 26 in which a plurality of bus bars for connecting the coil conductors 16 to each other are integrated for each phase. FIG. 2 is a diagram showing a state where the stator 10 is mounted, and FIG. 3 is a schematic diagram showing a single state of the bus bar module 26.

  The bus bar module 26 is disposed adjacent to the side portion of the stator 10, in particular, the coil group 18 in the rotation axis direction. The bus bar module 26 includes a bus bar module main body 28 that extends in an arc shape along the annular shape of the stator 10, and a terminal 30 that protrudes from the main body 28 and is connected to the coil conductor wire extension 20. A plurality of bus bars extending along the arc of the main body 28 are disposed in the bus bar module main body 28, and end portions of the bus bar protrude from the bus bar module main body 28 to form terminals 30. This terminal 30 is referred to as a bus bar end extension 30. The bus bar end extending portion 30 protrudes from a side surface of the bus bar module main body 28, that is, a surface facing a direction intersecting the longitudinal direction of the bus bar module main body 28. In the stator 10, it protrudes from back-to-back side surfaces, particularly the arc-shaped outer peripheral side surface and inner peripheral side surface of the bus bar module main body 28.

  Further, a holding portion 34 for holding the connection plate 32 connected to the power line 22 by welding or the like is provided so as to protrude from the bus bar module main body 28 (see FIG. 3). Three connection plates 32 are provided in the same manner as the number of phases. The radial dimension of the bus bar module main body 28, that is, the width is equal to or smaller than the radial width of the coil group 18, and the entire width of the bus bar module 26 including the holding portion 34 is also within the width of the stator core 12.

  The coil group 18 of the stator 10 is formed by connecting two partial coils for each phase with a bus bar. One end of each coil conductor of the two partial coils is connected to the bus bar, the end of the remaining coil conductor of one partial coil is the neutral point, and the end of the remaining coil conductor of the other partial coil is the power line Connected to.

  This will be described more specifically with reference to FIG. The bus bar end extension 30 is connected to the U-phase coil conductor 30H1 and 30U2, and the one connected to the V-phase coil conductor 30V1 and 30V2 is connected to the W-phase coil conductor. Reference numerals 30W1, 30W2 and terminals connected to the neutral point side ends of the coil conductors of the respective phases are indicated by reference numerals 30N1, 30N2, and 30N3. One of the two U-phase partial coils has one end of a coil conductor of the partial coil connected to the bus bar end extension 30U1, and the other end connected to the bus bar end extension 30N1 on the neutral point side. One end of the coil conductor of the other partial coil is connected to the bus bar end extension 30U2 and the other end is connected to the connection plate 32. The same applies to the V phase and the W phase.

  A holding portion 34 that holds the connection plate 32 is provided on the outer peripheral side of the bus bar module main body 28. One end of the coil conductor 16 is connected to the connection plate 32. The connection plate 32 is, for example, substantially J-shaped, and is held with the short side portion of the J-shape facing outward in the circumferential direction. The power line 22 is connected to the short side, and the remaining ends of the coil conductors 16 of each phase are connected to the long side.

  FIG. 4 is a cross-sectional view of the bus bar module 26 at a position where the four bus bars 36 corresponding to the U, V, W phase and the neutral point are arranged in parallel, for example, the line AA in FIG. It is sectional drawing. The four bus bars 36 are arranged in a 2 × 2 arrangement with two layers on the top and bottom and two rows on the left and right. In FIG. 4 (also in FIG. 5), the vertical direction is the rotational axis direction of the rotating electrical machine, and the side closer to the stator is down and the far side is up. The left-right direction is a direction orthogonal to the rotation axis, that is, the radial direction of the rotating electrical machine, and the left is the inner side of the rotating electrical machine and the right is the outer side. However, these directions are introduced for convenience of description, and are not related to the direction and orientation in the actual arrangement of the apparatus. Further, when it is necessary to distinguish the four bus bars 36, the U, V, W phase, and neutral point bus bars will be described with reference numerals 36U, 36V, 36W, and 36N, respectively.

  As shown in FIG. 4, the U-phase bus bar 36U is arranged in the lower left column, the V-phase bus bar 36V is arranged in the upper right column, the W-phase bus bar 36W is arranged in the upper left column, and the neutral bus bar 36N is arranged in the lower right column. Is done. Further, each of the four regions in the 2 × 2 arrangement will be described as a section 38 for explanation. Then, as shown in FIG. 5, for the four sections, the upper left column is section 38-1, the upper right column is section 38-2, the lower left column is section 38-3, and the lower left column is section 38-4. I write.

  The bus bar module 26 includes an insulating member 40 to insulate the bus bars 36 from each other and cover the periphery of the bus bar 36 except the bus bar end extending portion 30 to insulate the bus bar 36 from the outside. The insulating member 40 is, for example, a resin molded product, and the bus bars 36U, 36V, 36W, and 36N are integrated by molding. In the figure, the insulating member 40 is shown as a single unit, but may be divided into two or more parts for the convenience of molding. For example, the cross portion at the center of the “rice” shape of the insulating member 40 may be first molded, and a bus bar may be disposed on the cross-shaped component, and these may be further resin-molded.

  As shown in FIG. 4, the bus bar module 26 has support portions 50 at the lower corners of the bus bar module main body 28, that is, at both side corners close to the stator core 12. When the bus bar module 26 is attached to the stator 10, the support unit 50 holds the bus bar module main body 28 in a state where a gap is formed between the bus bar module main body 28 and the coil conductor 16 of the partial coil (that is, the coil group 18). It has a supporting function.

  The support part 50 is integrally formed with the insulating member 40 that is a resin molded product. Further, the support portion 50 is formed so as to extend from the inside and outside in the radial direction so as to extend from the bus bar module main body 28 and then hang down downward, that is, along the rotation axis direction. Hereinafter, the inclined portion of the support portion 50 may be referred to as an inclined portion 52, and the portion depending on the rotation axis direction may be referred to as a hanging portion 54.

  However, the support part 50 may have any shape as long as it functions to support the bus bar module main body 28 in a non-contact manner with the coil conductor 16. For example, the support part 50 may be comprised only by the drooping part 54 extended along the rotating shaft direction from the bus-bar module main body 28. FIG. Further, the position where the support portion 50 extends is not limited to the lower corner of the bus bar module main body 28, and may be the side surfaces 28 a and 28 b of the bus bar module main body 28, or the bottom surface of the bus bar module main body 28. 28c may be used. Furthermore, the circumferential width of the support portion 50 can be appropriately set in consideration of ease of insertion between the coil conductors at the coil end portion protruding from the stator core 12 in the rotation axis direction, as will be described later.

  FIG. 6 is a diagram showing individual shapes of the bus bars 36U, 36V, 36W, and 36N. 6A shows the upper layer, that is, the layer to which the sections 38-1 and 38-2 belong, and FIG. 6B shows the lower layer, that is, the layer to which the sections 38-3 and 38-4 belong. Each of the bus bars 36U, 36V, 36W, and 36N is obtained by making a plate-like member into a substantially arc shape, and the plate surface is located in a plane formed by the arc. And the bus-bar end extension part 30 is provided in the both ends of a circular arc, or both ends and an intermediate position. The U-phase bus bar 36U is disposed in the lower left section 38-3. The V-phase bus bar 36V is disposed in the upper layer, crosses the left section 38-1 from the terminal 30V1, passes through the right section 38-2, and again crosses the left section 38-1 to reach the terminal 30V2. The W-phase bus bar 36W extends along the section 38-1 from the terminal 30W1, moves from the upper layer to the lower layer at a position past the terminal 30U2, and reaches the terminal 30W2 through the section 38-3. The neutral bus bar 36 extends through the lower and right compartments 38-4. As described above, the four bus bars 36 are arranged in two layers in the upper and lower layers in the bus bar module main body 28 and arranged in parallel on the left and right.

  FIG. 7 is a view showing a state of supporting the bus bar module main body 28 together with the connection state of the coil conductor wire extended portion 20 and the bus bar extended portion 30. For simplicity, only one bus bar 36 in the bus bar module body 28 is shown. In FIG. 7, the left side indicates the radially outer side and the right side indicates the radially inner side (the same applies to FIGS. 8 and 10), and reference numeral 11 denotes a cylindrical case that is mounted on the outer periphery of the stator 10 by shrink fitting or the like. is there.

  The bus bar module main body 28 has a generally arc shape having a rectangular cross section (see FIG. 3), and FIG. 7 shows a cross section orthogonal to the direction in which the arc extends. Also in the description according to FIG. 7, the upper and lower meanings are the same as those in FIGS. The coil group 18 is located below in FIG. More specifically, the bus bar module main body 28 is provided to face the coil end portion 19 that protrudes from the stator core 12 in the rotation axis direction in the plurality of partial coils that constitute the coil group 18.

  The bus bar 36 protrudes leftward or rightward from the side surface of the bus bar module main body 28, and then bends upward. The portion extending upward is the bus bar end extension 30. Moreover, the up-down direction in FIG. 7 is a direction in which the rotation axis of the rotating electrical machine extends, and thus the bus bar end extension 30 extends in the direction of the rotation axis. Further, as described above, the coil group 18 is arranged below the bus bar module main body 28 in FIG. 7, and thus the bus bar end extending portion 30 extends in a direction away from the coil group 18.

  The left and right bus bars 36 of the bus bar module body 28 extend in the same direction, that is, in the direction of the rotation axis or away from the coil group 18. As a result, the bus bar module 26 has a U-shape when viewed from the longitudinal direction.

  In FIG. 7, the coil conductor wire end extending portion 20 also extends adjacently along the bus bar end extending portion 30 that extends upward, that is, in the direction of the rotation axis. Similarly to the bus bar end extending portion 30, the coil conductor end extending portion 20 extends in a direction away from the coil group 18. Further, the coil conductor end extending portion 20 is provided with a wire portion 44 having no coating 42 made of an insulating resin material such as enamel resin at the tip. A portion covered with the wire portion 44 is referred to as a covered portion 46.

  The leading ends of the coil conductor extended end portion 20 and the bus bar extended end portion 30 are connected by welding. In the drawing, the welded portion indicated by reference numeral 48 is drawn so as to be in contact with the coil conductor extended end portion 20 and the bus bar extended end portion 30 with a boundary. No border appears. Further, the welded portion 48 may be formed to have a substantially spherical shape including the tips of the coil conductor wire extended portion 20 and the bus bar extended portion 30.

  The bus bar module 26 has a U shape, and is connected to the coil conductor end extending portion 20 at both ends of the U shape. Here, when the bus bar module 26 is welded to the coil conducting wire end extending portion 20 and the bus bar module main body 28 is disposed in contact with the coil conducting wire 16 of the coil end portion 19, the bus bar module main body 28 is pressed against the diameter. The coil conductors located adjacent to each other in the direction or the rotation axis direction may move and rub against each other, and the coating 42 of the coil conductor may be damaged.

  Therefore, in the present embodiment, the bus bar module main body 28 is supported by the support portion 50 formed on the bus bar module main body 28 in a state where the bus bar module main body 28 is floated from the coil conducting wire 16 constituting the coil end portion 19, that is, in a non-contact state. More specifically, one of the two support portions 50 is inserted and gripped between the coil lead wire 16a located radially inward in the coil end portion 19 and the coil lead wire 16c adjacent thereto, and the tip thereof. Is in contact with the end face of the stator core 12. The other support portion 50 is inserted and gripped between the coil lead wire 16b radially outermost in the coil end portion 19 and the coil lead wire 16c adjacent thereto, and its tip abuts against the end surface of the stator core 12. ing. As a result, a gap 56 having a dimension G is formed between the coil conductors 16 a, 16 b, 16 c of the coil end portion 19 and the lower surface of the bus bar module main body 28. As will be described later, the dimension G is preferably set to such an extent that the bus bar module main body 28 is not in contact with the crossover conductor even when the crossover conductor is present at the coil end.

  When the front end of the support portion 50 abuts on the end surface of the stator core 12, the position of the bus bar module main body 28 in the rotational axis direction can be accurately determined. That is, the dimension G of the gap 56 can be accurately defined. As a result, when the tips of the coil conductor end extension portion 20 and the bus bar end extension portion 30 are welded to each other, the tips can be arranged at the same height position.

  As described above, since the bus bar module main body 28 is supported by the support portion 50 with the gap 56 between the coil conductor wires 16a, 16b, and 16c of the coil end portion 19, the coil conductor end extension portion 20 and the bus bar are provided. Even when the bus bar module main body 28 is pressed when welding the ends of the end extending portions 30, the coil conducting wires 16a, 16b, 16c of the coil end portion 19 are not brought into contact with each other. As a result, the coil conducting wires 16a, 16b, It is possible to prevent the coil conductor coating 42 from being damaged by rubbing 16c.

  Further, when the coil group 18 is cooled using a cooling fluid such as cooling oil, the cooling fluid is allowed to flow through the gap 56 between the bus bar module main body 28 and the coil conductors 16a, 16b, and 16c of the coil end portion 19. Therefore, the cooling performance of the coil conductors 16a, 16b, 16c and the coil group 18 can be suppressed.

  Here, it is preferable that the coil conductors 16a and 16c (or 16b and 16c) on both sides into which the support portion 50 is inserted are coil conductors constituting partial coils belonging to the coil group 18 of different phases. In this case, there is an advantage that the insulation performance can be improved by increasing the distance between the conductors of the different-phase partial coils in which a large inter-phase potential difference occurs.

  FIG. 8 is a diagram illustrating a state in which a gap is formed between the bus bar module 26 and the transition wire portion 17 of the partial coil. In the stator 10 according to the present embodiment, the plurality of partial coils constituting the coil group 18 are each provided with the connecting wire portion 17 extending from the coil conducting wire 16a positioned radially inward in the coil end portion 19 and extending radially outward. Have. And the strand part 44 of the front-end | tip of the crossing conductor part 17 is welded to the strand part 44 of the coil conductor end extension part 20 extended from the coil conductor 16b located in radial direction outer side. In addition, the said crossing conductor part 17 is not limited to when extending along a radial direction, as FIG. 2 shows, You may extend | stretch in the direction inclined with respect to the radial direction.

  Also in this case, the bus bar module main body 28 is supported by the support portion 50 so that a gap 56 is formed between the bus bar module main body 28 and the crossover conductor portion 17. Therefore, similarly to the above, it is possible to prevent damage to the coating film of the coil conducting wire and to suppress a decrease in the cooling performance of the coil group.

  Next, an example in which the support portion is provided on the module cover will be described with reference to FIGS. 9 and 10. FIG. 9 is a perspective view showing the module cover 60. FIG. 10 is a view showing a state in which the bus bar module main body 28 is supported by the support portion 50 integrally formed with the module cover 60. The configuration shown in FIG. 10 is the same as that of FIG. 7 except that the support portion 50 is integrally formed with the module cover 60.

  As shown in FIGS. 9 and 10, the module cover 60 is formed in a substantially arc shape corresponding to the bus bar module 26. The module cover 60 includes a mounting portion 62 that is mounted on the main body 28 of the bus bar module 26, a cover portion 64 that is formed on the upper portion of the mounting portion 62, and a support portion 50 that is integrally connected to the lower portion of the mounting portion 62. Have The module cover 60 is preferably molded integrally with an insulating resin material, for example.

  The mounting portion 62 of the module cover 60 has a substantially U-shaped cross section, and can be attached to the bus bar module 26 by being fitted into the bus bar module main body 28 from above. The cover portion 64 of the module cover 60 is a portion that covers the welded portion 48 between the ends of the coil conductor end extension portion 20 and the bus bar end extension portion 30 on the outer side in the rotation axis direction when attached to the bus bar module 26. As shown in FIG. 9, the cover portion 64 may be formed in a shape separated at a predetermined interval in the circumferential direction, or may be formed in a shape that is annularly continuous in the circumferential direction.

  The support part 50 is formed so as to extend integrally from the lower part of the mounting part 62 of the module cover 60. The function and effect of the support part 50 are the same as described above. In this case, of course, it is not necessary to provide a support portion on the bus bar module main body 28.

  In addition, this invention is not limited to said embodiment and its modification, A various change and improvement are possible within the range of the matter described in a claim.

  For example, in the above description, it has been described that the axial position of the bus bar module 26 or the module cover 60 is determined by bringing the tip of the support portion 50 into contact with the stator core 12. However, the present invention is not limited to this. A protrusion is formed at an intermediate position (for example, the boundary between the inclined portion 52 and the hanging portion 54), and the protrusion is engaged with the surface of the coil conductors 16a, 16b, and 16c to define the insertion depth of the support portion. You may make it do.

  Further, the module cover is not limited to the one that is attached to the bus bar module by fitting, and may be attached by using a method such as adhesion or screwing alone or in combination.

  DESCRIPTION OF SYMBOLS 10 Stator, 12 Stator core, 16 Coil conductor, 17 Cross conductor part, 18 Coil group, 19 Coil end part, 20 Coil conductor end extension part, 26 Bus bar module, 28 Bus bar module main body, 30 Bus bar end extension part, 36 Bus bar, 42 Cover, 48 welds, 50 supports, 60 module cover.

Claims (6)

A stator of a rotating electric machine,
A plurality of partial coils mounted on the stator core;
A plurality of bus bars connecting the coil conductors of the partial coil to form a coil group;
A plurality of bus bars are integrated by an insulating member to form a bus bar module main body. The ends of the bus bar extend from the two back-to-back sides of the bus bar module main body, and the bus bar module main body is coiled in the direction of the rotation axis of the rotating electrical machine. Placed adjacent to the group,
The coil conductor has, at its end, a coil conductor end extending part extending in the rotation axis direction,
The bus bar has a bus bar end extending portion extending in the rotation axis direction at an end portion extending from the bus bar module main body,
The coil conductor end extension and the bus bar end extension to be connected are arranged adjacent to each other, and the ends of the coil conductor end extension and the bus bar end extension are welded to each other,
Furthermore, a support portion for supporting the bus bar module body on the stator in a state where a gap is formed between the bus bar module body and the partial coil,
A stator for rotating electrical machines. In the stator of the rotating electrical machine according to claim 1,
The support part is a part of a coil conducting wire constituting the partial coil, and extends from the radially inner side at the end of the partial coil in the rotational axis direction and extends to the radially outer side, and the bus bar module main body A stator of a rotating electrical machine that supports the bus bar module body so that a gap is formed between the stator and the bus bar module body. In the stator of the rotating electrical machine according to claim 1 or 2,
The bus bar module main body is a stator of a rotating electrical machine that is integrally formed with an insulating member that covers the periphery of the bus bar except for a bus bar end extending portion extending from a side surface of the bus bar module main body. In the stator of the rotating electrical machine according to claim 1 or 2,
An insulating module cover is further provided that covers the welded portion between the ends of the coil conductor wire extension portion and the bus bar end extension portion on the outer side in the rotational axis direction, and the support portion is integrally formed as a part of the module cover. , Stator of rotating electrical machines. In the stator of the rotating electrical machine according to any one of claims 1 to 4,
The stator of a rotating electrical machine, wherein the coil group includes a multi-phase coil group, and the support portion is inserted and held between coil conductors constituting partial coils included in different phase coil groups. The stator of the rotating electrical machine according to claim 5,
An end portion of the support portion in the rotation axis direction is positioned in contact with an end surface of the stator core in the rotation axis direction, and is positioned.

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