JP7205505B2 - power distribution material - Google Patents

Description

The present invention relates to a power distribution member that connects a plurality of coil ends projecting axially from a stator core of a rotating electrical machine to electrodes of a terminal block.

2. Description of the Related Art Conventionally, in a rotating electric machine that functions as an electric motor or a generator, a plurality of coil pieces are attached to slots provided in a stator core, and coil ends, which are ends of the plurality of coil pieces, are mounted in slots provided in a stator core, as disclosed in Patent Document 1, for example. Some are welded together. Each coil piece is covered with an electrical conductor having a flat cross section with insulation except for the coil ends. A plurality of coil pieces constitute a three-phase stator winding by welding the coil ends to each other.

Further, Patent Literature 2 describes a connection structure of an electric motor provided with a terminal block unit that feeds each phase current to each of the three-phase stator windings. The terminal block unit includes first to third lead wires connecting the first to third terminals and the ends of the U-phase, V-phase, and W-phase windings, and a terminal block fixed to the stator core. I have. The first to third lead wires each have a main body portion extending in a direction perpendicular to the rotation axis of the rotor, and a bent tip portion welded to the terminal end of each phase winding. The bent tip is bent at right angles to the main body. The terminal end of each phase winding protrudes from the stator core in an axial direction parallel to the rotation axis of the rotor. This configuration improves the workability when welding the end of the winding and the bent tip.

Japanese Patent Application Laid-Open No. 2001-238419 JP 2016-82675 A

When the wire connection structure described in Patent Document 2 is applied to the rotary electric machine described in Patent Document 1, the coil ends connected to the first to third lead wires are bent and extended in the axial direction along the distal end portions. can be considered. However, in this case, the axial length of the rotating electric machine including the coil ends increases. In addition, when changing the shape of the lead wire in order to shorten the axial length of the rotating electric machine, the heat generated when the lead wire and the coil end are welded may melt the coating layer of the lead wire, or cause the conductor part of the lead wire to become damaged. It is also necessary to pay attention to the spatial distance from the coil end.

The present invention has been made in view of the above circumstances, and an object of the present invention is to suppress an increase in the axial length of a rotating electric machine and reduce the heat generated during welding between the end portions of the coil pieces that make up the winding. An object of the present invention is to provide a power distribution member capable of suppressing dissolution of a coating layer due to

An object of the present invention is to solve the above problems by providing a power distribution member that has a plurality of single conductive wires and that connects a plurality of coil ends projecting axially from a stator core of a rotating electric machine to electrodes of a terminal block. In each of the plurality of conductive wires, the surface of a conductor made of a conductive metal is coated with a coating layer, and the coating extends over a predetermined length range including a connection portion welded to the coil end. A layer is removed, and the plurality of conductive wires are composed of at least one first conductive wire having the connecting portion extending in the axial direction of the stator core and at least one first conductive wire having the connecting portion extending along the circumferential direction of the stator core. and at least one second conductive wire bent in a radial direction, wherein the predetermined length of the second conductive wire from which the coating layer is removed is equal to the coating of the first conductive wire. A power distribution member is provided that is longer than the predetermined length from which layers are removed.

According to the power distribution member of the present invention, while suppressing an increase in the axial length of the rotating electric machine, it is possible to suppress the dissolution of the coating layer due to the heat generated when the end portions of the coil pieces forming the winding are welded. It becomes possible.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 shows a configuration example of a rotary electric machine provided with a power distribution member according to an embodiment of the present invention, where (a) is an overall view and (b) is a partially enlarged view of (a); FIG. 3 is a configuration diagram of the power distribution member, the terminal block, and the stator core viewed from the axial direction; FIG. 4 is a perspective view showing a coil unit in which four coil pieces are combined; FIG. 4 is a perspective view showing a portion of the power distribution member together with linear portions of some of the plurality of coil pieces attached to the stator core. 1 shows a power distribution member, (a) is an axial view, (b) is a circumferential view, and (c) is a perspective view. FIG. 8A is a perspective view and FIG. 8B is an axial view showing a part of a connecting portion and a radially extending portion of a second U-phase lead wire; FIG. 4A is a perspective view and FIG. 4B is a circumferential view showing a part of a connecting portion and an axially extending portion of a first W-phase lead wire; FIG. 10 is an axial view showing the connecting portion and the radially extending portion of the second U-phase lead wire together with the coil ends of the plurality of coil pieces; FIG. 11 is an axial view of a modification showing the connecting portion and the radially extending portion of the second U-phase lead wire together with the coil ends of the plurality of coil pieces;

[Embodiment]
FIG. 1 shows a configuration example of a rotating electric machine provided with a power distribution member according to an embodiment of the present invention, (a) is an overall view, and (b) is a partially enlarged view of (a).

This rotating electric machine 1 includes a power distribution member 2 , a terminal block 3 , a rotor 4 having a shaft 11 inserted through its center, and a stator 5 arranged to surround the rotor 4 . The rotor 4 has a plurality of magnets 42 embedded in a rotor core 41 made of soft magnetic metal, and rotates together with the shaft 11 . The stator 5 has a stator core 51 made of soft magnetic metal and a plurality of coil pieces 52 .

The rotary electric machine 1 is mounted on a vehicle driven by electric power, such as an electric vehicle or a so-called hybrid vehicle. In the following description, a case where the rotating electrical machine 1 is used as an electric motor will be described, but the rotating electrical machine 1 can also be used as a generator. Further, in the following description, a direction parallel to the rotation axis O of the shaft 11 is called an axial direction, a direction perpendicular to the rotation axis O is called a radial direction, and a direction perpendicular to the axial direction and the radial direction is called a direction. called circumferential direction.

FIG. 2 is a configuration diagram of the power distribution member 2, the terminal block 3, and the stator core 51 viewed from the axial direction. FIG. 3 is a perspective view showing a coil unit 50 in which four coil pieces 52 are combined. In the following description, for convenience of explanation, of the two axial sides of the stator core 51, the side on which the power distribution member 2 and the terminal block 3 are arranged is referred to as the upper side, and the opposite side is referred to as the lower side. However, the upper side and the lower side do not specify the vertical direction when mounted on a vehicle.

The terminal board 3 has a base board 30 made of resin and first to third electrodes 31 to 33 . The base 30 is fixed to a case member (not shown) that houses the stator 5, and three-phase alternating current is supplied to the first to third electrodes 31 to 33 from a controller.

The stator core 51 integrally has a cylindrical back yoke 511 and a plurality of teeth 512 projecting radially inward from the back yoke 511 . In this embodiment, 72 teeth 512 are provided at regular intervals in the circumferential direction, and slots 510 are formed between teeth 512 adjacent in the circumferential direction.

Each coil piece 52 includes a pair of linear main body portions 521 accommodated in slots 510 of the stator core 51, a pair of inclined portions 522 protruding from the slots 510 and arranged above the stator core 51, and respective inclined portions. It has a pair of linear portions 523 extending axially further upward from the upper end of 522 and a connection portion 524 connecting the pair of main body portions 521 below the stator core 51 . The inclined portion 522 is inclined at an obtuse angle with respect to the main body portion 521 .

The coil piece 52 is composed of a conductive metal 52M having good conductivity such as copper or aluminum, and an electrically insulating coating layer 52I covering the surface of the conductive metal 52M. In this embodiment, the conductive metal 52M is a rectangular single wire having a rectangular cross section, and the coating layer 52I is made of enamel coating. At the coil end 520, which is the upper end of the straight portion 523, the coating layer 52I is removed to expose the conductive metal 52M.

Moreover, in the present embodiment, 288 coil pieces 52 are attached to the stator core 51 and each slot 510 accommodates eight body portions 521 . The 288 coil pieces 52 are welded together at their coil ends 520 to form two sets of three-phase (U-phase, V-phase, and W-phase) stator windings. Further, of the two sets of three-phase stator windings, the first set of three-phase stator windings and the second set of three-phase stator windings are out of phase with each other by a predetermined electrical angle. The first set of three-phase stator windings is formed closer to the outer circumference of stator core 51 than the second set of three-phase stator windings. Note that the welded portions between the coil ends 520 may be coated with resin.

FIG. 4 is a perspective view showing a portion of the power distribution member 2 together with the linear portions 523 of some of the plurality of coil pieces 52 attached to the stator core 51. FIG. 5 shows the power distribution member 2, (a) is an axial view, (b) is a circumferential view, and (c) is a perspective view.

The power distribution member 2 has six conductive wires and three terminals, and connects the first to third electrodes 31 to 33 of the terminal block 3 to the coil ends 520 of the coil pieces 52 of each phase. The six conductive wires are first and second U-phase leads 21, 22, first and second V-phase leads 23, 24, and first and second W-phase leads 25, 26. consists of The three terminals consist of a U-phase terminal 27 , a V-phase terminal 28 and a W-phase terminal 29 . The U-phase terminal 27 has a plate portion 271 connected to the first electrode 31 of the terminal block 3 and a crimping portion 272 to which the first and second U-phase lead wires 21 and 22 are crimped together. ing. A bolt insertion hole 270 is formed in the plate portion 271 , and the plate portion 271 is connected to the first electrode 31 by a bolt 34 (see FIG. 2 ) inserted through the bolt insertion hole 270 .

Similarly, the V-phase terminal 28 includes a plate portion 281 connected to the second electrode 32 of the terminal block 3 and a crimping portion 282 to which the first and second V-phase lead wires 23 and 24 are crimped together. have. A bolt insertion hole 280 is formed in the plate portion 281 , and the plate portion 281 is connected to the second electrode 32 by a bolt 35 (see FIG. 2 ) inserted through the bolt insertion hole 280 . Similarly, the W-phase terminal 29 includes a plate portion 291 connected to the third electrode 33 of the terminal block 3 and a crimping portion 292 to which the first and second W-phase lead wires 25 and 26 are crimped together. and A bolt insertion hole 290 is formed in the plate portion 291 , and the plate portion 291 is connected to the third electrode 33 by a bolt 36 (see FIG. 2 ) inserted through the bolt insertion hole 290 .

The first U-phase lead wire 21, the first V-phase lead wire 23, and the first W-phase lead wire 25 connect the terminals 27, 28, 29 of each phase and the first set of three-phase stator windings. The coil ends 520 of the coil pieces 52 corresponding to the ends of the U-phase, V-phase, and W-phase stator windings are electrically connected. A second U-phase lead wire 22, a second V-phase lead wire 24, and a second W-phase lead wire 26 connect the terminals 27, 28, 29 of each phase and the second set of three-phase stator windings. The coil ends 520 of the coil pieces 52 corresponding to the ends of the U-phase, V-phase, and W-phase stator windings are electrically connected.

The first U-phase lead wire 21, the first V-phase lead wire 23, and the first W-phase lead wire 25 correspond to the "first conductive wire" of the claimed invention. The second U-phase lead wire 22, the second V-phase lead wire 24, and the second W-phase lead wire 26 correspond to the "second conductive wire" of the claimed invention.

The first and second U-phase leads 21, 22, the first and second V-phase leads 23, 24, and the first and second W-phase leads 25, 26 are each made of a conductive metal. The surface of the conductor 2M is covered with an electrically insulating covering layer 2I. As the conductive metal, for example, copper or a copper alloy can be preferably used. An enamel coating can be preferably used as the coating layer 2I. The conductor 2M is a single wire (single metal conductor that is not a stranded wire), and in the present embodiment, a round single wire having a circular cross section is formed into a predetermined shape by press working. However, the conductor 2M may be formed of a flat single wire having a rectangular cross section.

Also, the first and second U-phase lead wires 21 and 22, the first and second V-phase lead wires 23 and 24, and the first and second W-phase lead wires 25 and 26 are connected to the first holding It is held in the portion 201 . Also, the second V-phase lead wire 24 and the first W-phase lead wire 25 are held by the second holding portion 202 . Furthermore, the first U-phase lead wire 21 , the first V-phase lead wire 23 , and the second W-phase lead wire 26 are held by the third holding portion 203 . The first holding portion 201 and the second holding portion 202 are connected by a connecting portion 204 , and the first holding portion 201 and the third holding portion 203 are connected by a connecting portion 205 . The first to third holding portions 201 to 203 and connecting portions 204 and 205 are made of resin integrally molded by injection molding.

At least one of the first to third holding portions 201 to 203 may be provided with a fixing portion (such as a flange portion having a bolt insertion hole for inserting a bolt) for fixing to another component. . Vibration applied to the power distribution member 2 , the welded portion between the power distribution member 2 and the coil end 520 , and the connection portion between the power distribution member 2 and the terminal block 3 can be suppressed by fixing to other parts. At least one of the first to third holding units 201 to 203 may be provided with a handling unit for robot transportation.

The first U-phase lead wire 21, the first V-phase lead wire 23, and the first W-phase lead wire 25 are axially extended from the first holding portion 201 and connected to terminals 27 and 28 of respective phases. , 29, extension portions 212, 232, and 252 extending from the first holding portion 201 and extending in a direction perpendicular to the axial direction, and an extension portion 212. , 232 and 252 extending in the axial direction upward, and connection portions 214 , 234 and 254 welded to the coil ends 520 of the coil pieces 52 . have.

The connection portions 214 , 234 , 254 axially extend further upward from the upper ends of the axially extending portions 213 , 233 , 253 and project from the stator core 51 in the axial direction. They are welded to the coil ends 520 of the coil pieces 52 corresponding to the ends of the U-phase, V-phase, and W-phase stator windings of the phase stator windings. In addition, the first U-phase lead wire 21, the first V-phase lead wire 23, and the first W-phase lead wire 25 have the coating layer 2I over a predetermined length range including the connection portions 214, 234, and 254. removed to expose the conductor 2M.

A second U-phase lead wire 22, a second V-phase lead wire 24, and a second W-phase lead wire 26 are axially extended from the first holding portion 201 and connected to terminals 27 and 28 of respective phases. , 29, extension portions 222, 242, and 262 extending from the first holding portion 201 and extending in a direction perpendicular to the axial direction, and an extension portion 222. , 242, 262 extending axially upward from the ends of the axially extending portions 223, 243, 263 and further radially extending from the ends of the axially extending portions 223, 243, 263. radially extending portions 224 , 244 , 264 extending inward of the stator core 51 , and connections bent radially along the circumferential direction of the stator core 51 and welded to the coil ends 520 of the coil pieces 52 . It has parts 225 , 245 , 265 .

Connecting portions 225 , 245 , 265 extend circumferentially from the radially inner ends of radially extending portions 224 , 244 , 264 and project axially from stator core 51 to form a second set of three-phase stators. They are welded to the coil ends 520 of the coil pieces 52 corresponding to the ends of the U-phase, V-phase, and W-phase stator windings of the child windings. In addition, the second U-phase lead wire 22, the second V-phase lead wire 24, and the second W-phase lead wire 26 have the coating layer 2I over a predetermined length range including the connection portions 225, 245, and 265. removed to expose the conductor 2M. The connection portions 225 , 245 , 265 are bent in the circumferential direction of the stator core 51 from the radially inner ends of the radially extending portions 224 , 244 , 264 and extend along the circumferential direction.

The connection portions 225, 245, 265 of the second U-phase lead wire 22, the second V-phase lead wire 24, and the second W-phase lead wire 26 are connected to the first U-phase lead wire 21, the first V-phase lead wire It is connected to the coil end 520 inside the stator core 51 in the radial direction of the connection portions 214 , 234 , 254 of the phase lead wire 23 and the first W-phase lead wire 25 . The surfaces of the connection portions 214, 225, 234, 245, 254, and 265 facing the coil end 520 are flattened by press working.

In the present embodiment, welding between connection portions 214, 225, 234, 245, 254, and 265 and coil ends 520 of coil pieces 52 is performed by TIG (Tungsten Gas), which is a kind of arc discharge welding method using inert gas. inert gas) welding. During TIG welding, the stator 5 is fixed to a jig so that the coil ends 520 protrude upward from the stator core 51 in the vertical direction, and the electrodes of the welding torch face the coil ends 520 in the axial direction. .

Taking the second U-phase lead wire 22 and the first W-phase lead wire 25 as examples, as shown in FIG. A portion of the coil end 520 protruding in the axial direction beyond the connecting portions 225 and 254 is melted by the heat generated by the discharge and welded to the connecting portions 225 and 254 . The molten metal melted at the tip of the coil end 520 flows down to the upper side surface 225 a of the connection portion 226 of the second U-phase lead wire 22 and the upper surface 255 a of the connection portion 254 of the first W-phase lead wire 25 . come into contact with However, not limited to this, the tip surface of the coil end 520, the upper side surface 225a of the connecting portion 225, and the upper surface 254a of the connecting portion 254 may be positioned at the same axial position. That is, coil end 520 does not have to protrude further in the axial direction than connecting portions 225 and 254 .

FIG. 6 shows a part of the connecting portion 225 and the radially extending portion 224 of the second U-phase lead wire 22, where (a) is a perspective view and (b) is an axial view. FIG. 7 shows a part of the connecting portion 254 and the axially extending portion 253 of the first W-phase lead wire 25, where (a) is a perspective view and (b) is a circumferential view. 8 is an axial view showing the connecting portion 225 and the radially extending portion 224 of the second U-phase lead wire 22 together with the coil ends 520 of the plurality of coil pieces 52. FIG.

The connection portions 245 and 265 and the radially extending portions 244 and 264 of the second V-phase lead wire 24 and the second W-phase lead wire 26 are also connected to the connection portion 225 and the diameter of the second U-phase lead wire 22 . It is configured in the same manner as the directionally extending portion 224 . Moreover, the connecting portions 214 and 234 and the axially extending portions 213 and 233 of the first U-phase lead wire 21 and the first V-phase lead wire 23 are also connected to the connecting portion 254 and the axial direction of the first W-phase lead wire 25 . It is configured in the same manner as the directionally extending portion 253 .

The coating layer 2I of the second U-phase lead wire 22 is removed not only from the connecting portion 225 but also from part of the radially extending portion 224 . Similarly, the first W-phase lead wire 25 has the covering layer 2I removed not only at the connecting portion 254 but also at a portion of the axially extending portion 253 . This prevents the coating layer 2I from melting due to the heat generated when the connecting portions 225 and 254 are welded.

As shown in FIGS. 6(b) and 7(b), the second U-phase lead wire 22 has a length L ₁ of the portion where the coating layer 2I is removed from the tip surface 22a thereof, and The W-phase lead wire 25 of No. 1 has a length L ₂ of the portion where the covering layer 2I is removed from the upper surface 254a. Figures 6(b) and 7( _b ) are to the same scale and L1 is longer _than L2. Note that L ₁ is the length along the extending direction of each of the connecting portion 225 and the radially extending portion 225 of the second U-phase lead wire 22, and L ₂ is the length of the first W-phase lead wire. 25 along the respective extending directions of the connecting portion 254 and the axially extending portion 253 .

_The longer L ₁ and L _{2 are} , the more effective it is to prevent the coating layer 2I from dissolving. becomes shorter. Therefore, it is desirable to shorten L ₁ and L ₂ as much as possible while preventing dissolution of the coating layer 2I. In this embodiment, L ₁ and L ₂ are set based on this point of view. More specifically, L ₁ and L ₂ are set so that the distances from the portion where the coil end 520 contacts the molten metal during TIG welding to the end 2Ie of the coating layer 2I are substantially equal. . Thereby, the connecting portions 225, 245, 265 extending along the circumferential direction and the connecting portions 214, 234, 254 extending along the axial direction can be welded under the same welding conditions.

The portion in contact with the molten metal is the side surface 225a of the connecting portion 225 of the second U-phase lead wire 22, and the upper surface 254a of the connecting portion 254 of the first W-phase lead wire 25. FIG. The side surface 225a of the connecting portion 225 of the second U-phase lead wire 22 extends in the extending direction of the connecting portion 225, but the upper surface 254a of the connecting portion 254 of the first W-phase lead wire 25 does not extend in the direction of extension of This difference is the difference in length between L ₁ and L ₂ . That is, the difference between the lengths of L ₁ and L ₂ is the dimension corresponding to the length of the side surface 225 a along the extending direction of the connecting portion 225 of the second U-phase lead wire 22 .

Further, as shown in FIG. 6B, an extension line La extending in the extending direction of the connection portion 225 from the surface 225b facing the coil end 520 of the connection portion 225 of the second U-phase lead wire 22 and a diameter Assuming that the angle between the direction extending portion 224 and the central axis Ca is θ, θ is an obtuse angle. In other words, the connecting portion 225 of the second U-phase lead wire 22 forms an obtuse angle between the facing surface 225b facing the coil end 520 and the radially extending portion 224, and the connecting portion 225 extends radially. It is bent at an angle of less than 90° with respect to the base portion 224 . The extension line La and the central axis Ca are straight lines perpendicular to the axial direction.

θ is more specifically 92 to 94° (92° or more and 94° or less), and in this embodiment, θ is 93°. During TIG welding, the facing surface 225b of the connection portion 225 of the second U-phase lead wire 22 is in surface contact with the corresponding side surface 520a of the coil end 520 (see FIG. 8).

As a result, when viewed in the axial direction of the stator 5 shown in FIG. 8, the radially extending portion 225 is arranged between the plurality of coil ends 520 arranged in the circumferential direction, and the conductor 2M and the coil end exposed from the covering layer 2I are arranged. 520 is ensured. As a result, even if the resin coating the welded portions of the coil ends 520 is cracked due to vibration or the like, electrical insulation can be ensured.

Central axis of radially extending portion 224 between extension line La of facing surface 225b of connecting portion 225 of second U-phase lead wire 22 and end portion 2Ie of coating layer 2I of second U-phase lead wire 22 Let Da be the distance along Ca, and the axis between the extension line Lb of the upper surface 254a of the connecting portion 254 in the first W-phase lead wire 25 and the end portion 2Ie of the coating layer 2I of the first W-phase lead wire 25 Assuming that the distance along the center axis Cb of the direction extending portion 253 is Db, the ratio of Da to Db (Da/Db) is 0.90 to 1.10 (0.90 or more and 1.10 or less). is desirable. A more desirable range of Da/Db is 0.95 to 1.05 (0.95 to 1.05).

(Actions and effects of the embodiment)
According to the embodiment of the present invention described above, rather than the connection portions 214, 234, 254 of the first U-phase lead wire 21, the first V-phase lead wire 23, and the first W-phase lead wire 25, Connection portions 225, 245, and 265 of the second U-phase lead wire 22, the second V-phase lead wire 24, and the second W-phase lead wire 26 connected to the coil end 520 inside the stator core 51 in the radial direction are Since the stator core 51 is bent in the radial direction along the circumferential direction of the stator core 51, an increase in the axial length of the rotating electric machine 1 can be suppressed. Further, in the second U-phase lead wire 22, the second V-phase lead wire 24, and the second W-phase lead wire 26, the first U-phase lead wire 21, the first V-phase lead wire 23, and Since the length of the portion where the covering layer 2I is removed is longer than that of the first W-phase lead wire 25, it is possible to suppress melting of the covering layer 2I due to heat during TIG welding.

(Modification of Embodiment)
9 shows that when connecting portion 225 of second U-phase lead wire 22 is welded to coil end 520, surface 225b of connecting portion 225 facing coil end 520 is inclined with respect to side surface 520a of coil end 520. and FIG. 11 is an axial view showing a modification in which the contact is made in a state. In FIG. 9, components common to those described with reference to FIG. 8 are denoted by the same reference numerals, and redundant description is omitted.

In the embodiment with reference to FIG. 8 , when the connection portion 225 of the second U-phase lead wire 22 is welded to the coil end 520 , the surface 225 b of the connection portion 225 facing the coil end 520 is the side surface of the coil end 520 . 520a has been described, but in the modification shown in FIG. A gap S is formed between the opposing surface 225b and the side surface 520a of the coil end 520 at the other end in the extending direction of the connecting portion 225 . With this configuration, the molten metal flows into the gap S during TIG welding, and the connection portion 225 and the coil end 520 are welded more firmly.

(Summary of embodiment)
Next, technical ideas understood from the embodiments described above will be described with reference to the reference numerals and the like in the embodiments. However, each reference numeral in the following description does not limit the constituent elements in the claims to the members and the like specifically shown in the embodiment.

[1] A plurality of coil ends (520) and a terminal block (3) having a plurality of conductive wires (lead wires 21 to 26) made of single wires and protruding axially from a stator core (51) of a rotating electric machine (1) a power distribution member (2) connecting electrodes (31 to 33) of each of the plurality of conductive wires (21 to 26), the surface of a conductor (2M) made of a conductive metal is a coating layer ( 2I) and the coating layer (2I) is removed over a predetermined length range including the connection portions (214, 225, 234, 245, 254, 265) welded to the coil ends (520). The connection portions (214, 234, 254) of the plurality of conductive wires (21 to 26) are connected to at least one first conductive wire (21, 23) extending in the axial direction of the stator core (51). , 25), and at least one second conductive wire (22, 24, 26) bent in the radial direction so that the connecting portion (225, 245, 265) extends along the circumferential direction of the stator core (51). ), and the predetermined length (L ₁ ) from which the coating layer (2I) is removed in the second conductive lines (22, 24, 26) is equal to that of the first conductive lines (21, 23 , 25) longer than said predetermined length (L ₂ ) with said covering layer (2I) removed.

[2] The connecting portions (225, 245, 265) of the second conductive lines (22, 24, 26) are connected to the connecting portions (214, 234) of the first conductive lines (21, 23, 25). , 254) to the coil end (520) radially inward of the stator core (51), and the second conductive wires (22, 24, 26) extend radially of the stator core (51). radially extending portions (225, 245, 265) present, wherein the connecting portion (225, 245, 265) is the diameter of the stator core (51) at the radially extending portions (224, 244, 264). The connecting portion (225) of the second conductive wire (26) is bent from the direction inner end, and the connecting portion (225) of the second conductive wire (26) is connected to the facing surface (225b) facing the coil end (520) and the radially extending portion ( 224) is an obtuse angle (θ), the power distribution member (2) according to [1] above.

[3] When the connecting portions (225, 245, 265) of the second conductive wires (22, 24, 26) are welded to the coil ends (520), the coil ends at the connecting portions (225) The power distribution member (2) according to the above [1] or [2], wherein the surface (225b) facing the coil end (520) abuts the side surface (520a) of the coil end (520) in an inclined state.

Although the embodiments of the present invention have been described above, the embodiments described above do not limit the invention according to the scope of claims. Also, it should be noted that not all combinations of features described in the embodiments are essential to the means for solving the problems of the invention.

REFERENCE SIGNS LIST 1 rotating electric machine 2 power distribution member 2I coating layer 2M conductor 21 first U-phase lead wire (first conductor wire)
22 . . . Second U-phase lead wire (second conductive wire)
23... First V-phase lead wire (first conductive wire)
24 . . . Second V-phase lead wire (second conductive wire)
25... First W-phase lead wire (first conductive wire)
26... Second W-phase lead wire (second conductive wire)
214, 234, 254... Connecting parts 224, 244, 264... Radial direction extending parts 225, 245, 265... Connecting part 225b... Opposite surface 3... Terminal blocks 31 to 33... Electrode 51... Stator core 520... Coil end

Claims (3)

A power distribution member having a plurality of conductive wires made of single wires and a first holding portion for holding the plurality of conductive wires, and connected to a plurality of coil ends protruding axially from a stator core of a rotating electric machine. hand,
In each of the plurality of conductive wires, the surface of the conductor made of a conductive metal is coated with a coating layer, and the coating layer is removed over a predetermined length range including the connecting portion welded to the coil end. and
The plurality of conductive wires includes at least one first conductive wire in which the connection portion extends in the axial direction of the stator core, and the connection portion is bent in a direction intersecting the connection portion of the first conductive wire. and at least one second conductive line, and
The predetermined length of the second conductive line from which the covering layer is removed is longer than the predetermined length of the first conductive line from which the covering layer is removed,
Distribution material. Having a second holding part that holds a part of the plurality of conductive wires,
The first holding portion and the second holding portion are connected by a connecting portion,
A power distribution member according to claim 1 . When the connection portion of the second conductive wire is welded to the coil end, the surface of the connection portion facing the coil end abuts the side surface of the coil end in an inclined state,
The power distribution member according to claim 1 or 2.

Images