JP2021164208A - Stator of rotary electric machine - Google Patents

Abstract

To provide a stator of a rotary electric machine, in which a loss caused when driving a rotary electric machine and a torque ripple are reduced, and in which an output efficiency is improved.SOLUTION: A slot 22 of a stator core 20 of a stator 10, is structured by: a first slot into which a V-phase segment conductor 40 is inserted; a second slot into which the V-phase and U-phase segment conductors 40 are inserted; a third slot into which the U-phase segment conductor 40 is inserted; a fourth slot into which the U-phase and W-phase segment conductors 40 are inserted; a fifth slot into which the W-phase segment conductor 40 is inserted; and a sixth slot into which the W-phase and V-phase segment conductors 40 are inserted so as to be periodically arranged in this order in a peripheral direction. A leg part 41 of at least one part of the segment conductors 40 is connected to the leg part 41 of the segment conductor 40 in at least one of a curvature part 42 and a tip end part 44 so as to be separated by five slots in the peripheral direction.SELECTED DRAWING: Figure 4

Description

The present invention relates to a stator of a rotary electric machine, and more particularly to a stator of a rotary electric machine including a coil formed by a plurality of segment conductors inserted into each slot.

Conventionally, each of the U phase, V phase, and W phase composed of a plurality of segment conductors inserted in a row along the radial direction in each of the stator core and a plurality of slots formed along the circumferential direction of the stator core. A coil composed of phase windings and a stator of a rotating electric machine are known.

For example, Patent Document 1 has a U-shaped segment conductor in which a diagonal portion is formed on the open side and a pair of leg portions are connected by a curved portion on the closed side, and a plurality of conductors inserted into each slot. A stator of a rotary electric machine including a coil formed by a segment conductor is disclosed. A segment conductor constituting a winding having the same phase is inserted in each slot of the stator described in Patent Document 1. Then, the segment conductors constituting the U-phase, V-phase, and W-phase windings are arranged side by side in two slots, and the plurality of U-shaped segment conductors are arranged at intervals of 6 slots by curved portions on the closed side. Two legs are connected, and two legs are connected at intervals of 6 slots by an oblique portion on the open side.

Japanese Unexamined Patent Publication No. 2014-103707

However, in the stator of the rotary electric machine of Patent Document 1, since the legs of the segment conductors inserted into the respective slots are the legs of the segment conductors constituting the windings of the same phase, each slot is driven when the rotary electric machine is driven. There is a problem that the loss and the torque ripple caused by the harmonic component of the above are increased. Further, in recent years, there has been a demand for further improvement in output efficiency of rotary electric machines.

The present invention provides a stator of a rotary electric machine in which the loss and torque ripple generated when the rotary electric machine is driven are reduced and the output efficiency is improved.

The present invention
A substantially annular stator core having a plurality of teeth protruding inward in the radial direction at predetermined intervals along the circumferential direction and a plurality of slots that are spaces between the teeth adjacent to each other in the circumferential direction.
A coil composed of U-phase, V-phase, and W-phase windings formed by a plurality of segment conductors inserted into the plurality of slots.
Each said segment conductor
A pair of legs that extend parallel to each other, have a first end and a second end, are located inside the slot, and extend substantially linearly in the axial direction.
It is provided with a curved portion that connects the second ends of the pair of legs to each other, and has a substantially U-shape.
The first end portion of the pair of the leg portions protrudes outward from the first end surface in the axial direction of the stator core, and includes an oblique portion extending obliquely in the first direction or the second direction in the circumferential direction. A tip portion extending outward in the axial direction from the tip end of the skewed portion is formed.
The curved portion projects outward from the axial second end surface of the stator core.
The coil
An open-side coil end portion formed by the oblique portion and the tip portion of the segment conductor and projecting outward in the axial direction from the first end surface of the stator core.
It has a closed-side coil end portion formed by the curved portion of the segment conductor and projecting outward in the axial direction from the second end surface of the stator core.
In the plurality of slots, the legs of the plurality of segment conductors are inserted in a plurality of layers in a radial direction, and is a stator of a rotary electric machine.
The plurality of slots of the stator core are the first slot into which the segment conductor of the first phase of the U phase, V phase, and W phase is inserted, the segment conductor of the first phase and the U phase, V phase, and the like. The second slot into which the segment conductor of the second phase of the W phase is inserted, the third slot into which the segment conductor of the second phase is inserted, the segment conductor of the second phase and the U phase, V The fourth slot into which the segment conductor of the third phase of the phase and the W phase is inserted, the fifth slot into which the segment conductor of the third phase is inserted, and the segment conductor of the third phase. The sixth slot into which the segment conductor of the first phase is inserted is periodically arranged in this order in the circumferential direction.
The legs of at least a part of the segment conductor are connected to the legs of the segment conductor 5 slots apart in the circumferential direction by at least one of the curved portion and the tip portion.

According to the present invention, since the segment conductors of each phase are inserted into three adjacent slots, it is possible to reduce the loss and torque ripple that occur when the rotary electric machine is driven. Further, since the legs of at least a part of the segment conductor are connected to the legs of the segment conductor 5 slots apart in the circumferential direction by at least one of the curved portion and the tip portion, at least one of the curved portion and the tip portion. The height in the axial direction of is lowered, and the length of at least one of the curved portion and the tip portion is shortened. As a result, the resistance of the winding is reduced, so that the output efficiency of the rotary electric machine is improved.

It is a figure which looked at the stator of the rotary electric machine of one Embodiment of this invention from the outside in the radial direction. It is sectional drawing which saw the stator of the rotary electric machine of FIG. 1 from the axial direction. It is a perspective view of the segment conductor of the stator of the rotary electric machine of FIG. FIG. 1A is a developed view showing a configuration in which windings of the U-phase, V-phase, and W-phase coils of the stator of the rotary electric machine of FIG. 1 wind around each slot, and FIG. ) Is a developed view showing a configuration in which the winding V1 and the winding V2 wind around each slot. In the stator of the rotary electric machine shown in FIG. 1, the curved portion and / or the oblique portion connects two legs at intervals of 6 slots, and the curved portion and / or the oblique portion is 2 at intervals of 5 slots. It is a figure which compares the axial height and the total length of the curved part and / or the oblique part with the case where one leg part is connected. (A) is a developed view showing a configuration in which windings of the U-phase, V-phase, and W-phase coils of the stator of the rotary electric machine of the second embodiment wind around each slot, and FIG. It is a developed view which shows the structure which the winding V1 and winding V2 of (a) wind around each slot. (A) is a developed view showing a configuration in which windings of the U-phase, V-phase, and W-phase coils of the stator of the rotary electric machine of the third embodiment wind around each slot, and FIG. It is a developed view which shows the structure which the winding V1 and winding V2 of (a) wind around each slot. (A) is a developed view showing a configuration in which windings of the U-phase, V-phase, and W-phase coils of the stator of the rotary electric machine of the fourth embodiment wind around each slot, and FIG. It is a developed view which shows the structure which the winding V1 and winding V2 of (a) wind around each slot. (A) is a developed view showing a configuration in which windings of the U-phase, V-phase, and W-phase coils of the stator of the rotary electric machine of the fifth embodiment wind around each slot, and FIG. It is a developed view which shows the structure which the winding V1 and winding V2 of (a) wind around each slot.

Hereinafter, embodiments of the stator of the rotary electric machine of the present invention will be described with reference to the accompanying drawings. The drawings shall be viewed in the orientation of the symbols.

[First Embodiment]
First, the stator of the rotary electric machine according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 5.

<Overall configuration of stator>
As shown in FIGS. 1 and 2, the stator 10 of the rotary electric machine of the present embodiment includes a substantially ring-shaped stator core 20 and a coil 30 assembled to the stator core 20.

In the present specification and the like, for the sake of simplicity and clarification, the axial direction, the radial direction, and the circumferential direction refer to the directions with reference to the central axis CL of the stator 10 and the stator core 20. Further, the inner side in the axial direction means the central side of the stator 10 in the axial direction, and the outer side in the axial direction means the side away from the center of the stator 10 in the axial direction.

The stator core 20 has a substantially annular shape, and includes a plurality of teeth 21 protruding inward in the radial direction at predetermined intervals along the circumferential direction, and a plurality of slots 22 which are spaces between the teeth 21 adjacent to each other in the circumferential direction. , Equipped with. In this embodiment, the stator core 20 has 48 teeth 21 and 48 slots 22 are formed. The stator core 20 is formed as a laminated core formed by laminating a plurality of electromagnetic steel plates having a predetermined thickness in the axial direction. The stator core 20 has a first end surface 201 and a second end surface 202 in the axial direction.

The coil 30 is assembled to the stator core 20 and has an open side coil end portion 31 that protrudes outward in the axial direction from the first end surface 201 of the stator core 20 and a closed side coil that protrudes outward in the axial direction from the second end surface 202 of the stator core 20. The end portion 32 and the end portion 32 are formed.

The coil 30 has a plurality of segment conductors 40 inserted into each of the 48 slots 22.

As shown in FIG. 3, the segment conductor 40 is provided with an insulating coating portion 402 on a conductor portion 401 having a substantially rectangular cross section. The segment conductor 40 extends in parallel with each other, and has a pair of leg portions 41 having a first end portion 41a and a second end portion 41b, and a curved portion 42 connecting the second end portions 41b of the pair of leg portions 41. It has a substantially U-shape. In the segment conductor 40, a pair of leg portions 41 are inserted into different slots 22 of the stator core 20, and the curved portion 42 projects axially outward from the second end surface 202 of the stator core 20 and from the first end surface 201 of the stator core 20. It is arranged so that a protruding portion 400 projecting outward in the axial direction is formed.

Then, a jig (not shown) holds the tip portion of the protrusion 400 and rotates relative to the stator core 20 in the circumferential direction while approaching the stator core 20 in the axial direction, whereby the protrusion 400 is bent in the circumferential direction of the stator core 20. NS. As a result, the projecting portion 400 has a slanted portion 43 that bends and extends in the clockwise or counterclockwise direction in the circumferential direction when viewed from the second end surface 202 side of the stator core 20, and the projecting portion held by the jig. It is a tip portion of the portion 400, and has a shape having a tip portion 44 extending axially outward of the stator core 20 from the tip of the skew portion 43. In FIG. 3, the oblique portions 43 formed on the pair of leg portions 41 of the segment conductor 40 are oblique in the direction away from each other in the circumferential direction, but the pair of leg portions 41 of the segment conductor 40. Both of the formed oblique portions 43 may be oblique in the same direction in the clockwise direction or the counterclockwise direction in the circumferential direction, or may be oblique in the circumferential direction toward each other. good.

Then, the oblique portion 43 and the tip portion 44 of each segment conductor 40 inserted into each of the 48 slots 22 constitute the open side coil end portion 31 of the coil 30, and the curved portion 42 of each segment conductor 40 is formed. , Consists of the closed side coil end portion 32 of the coil 30.

In the present embodiment, the legs 41 of the segment conductors 40 are inserted into each slot 22 of the stator core 20 in four layers arranged in a line in the radial direction. That is, in each slot 22 of the stator core 20, the first leg portion 411 arranged in the first layer, the second leg portion 412 arranged in the second layer, and the third leg portion 412 arranged in the second layer are arranged in each slot 22 in the radial direction. The third leg portion 413 and the fourth leg portion 414 arranged in the fourth layer are inserted.

<Coil configuration with segment conductors>
Next, the configuration of the coil 30 by the segment conductors 40 inserted into each slot 22 of the stator core 20 will be described with reference to FIG. For the sake of simplicity and clarity, the 48 slots 22 of the stator core 20 are, for convenience, the first slot clockwise as shown in FIG. 2 when viewed from the second end surface 202 side of the stator core 20. It is set to 2201 to the 48th slot 2248. In FIG. 4, the numbers shown at the upper part of the horizontal axis indicate the slot numbers, and 1 to 48 correspond to the 1st slot 2201 to the 48th slot 2248, respectively. The numbers circled at the left end of the vertical axis indicate the layer numbers of the legs 41 inserted into each slot 22, and 1 to 4 are the first leg 411 to the fourth leg, respectively. Corresponds to 414.

As shown in FIG. 4A, the coil 30 is composed of a three-phase coil of a U-phase coil 30U, a V-phase coil 30V, and a W-phase coil 30W. A U-phase leader wire 50U, a V-phase leader wire 50V, and a W-phase leader wire 50W are connected to the coil 30. The U-phase leader line 50U, the V-phase leader line 50V, and the W-phase leader line 50W are electrically connected to a power conversion device (not shown) or the like. The U-phase coil 30U is electrically connected to the U-phase leader wire 50U. The V-phase coil 30V is electrically connected to the V-phase leader wire 50V. The W-phase coil 30W is electrically connected to the W-phase leader wire 50W. When the rotary electric machine is driven as an electric motor, the U-phase leader line 50U, the V-phase leader line 50V, and the W-phase leader line 50W are U-phase among the three-phase AC power supplied from a power conversion device (not shown). AC power, V-phase AC power, and W-phase AC power are supplied to the U-phase coil 30U, the V-phase coil 30V, and the W-phase coil 30W. When the rotary electric machine is driven as a generator, the U-phase leader line 50U, the V-phase leader line 50V, and the W-phase leader line 50W are U-phase AC power among the three-phase AC power generated by the rotary electric power, respectively. V-phase AC power and W-phase AC power are supplied to a power conversion device (not shown) or the like.

In the present embodiment, the U-phase leader line 50U has two leader lines, a first U-phase leader line 51U and a second U-phase leader line 52U. The V-phase leader line 50V has two leader lines, a first V-phase leader line 51V and a second V-phase leader line 52V. The W-phase leader line 50W has two leader lines, a first W-phase leader line 51W and a second W-phase leader line 52W. The first U phase leader line 51U and the second U phase leader line 52U, the first V phase leader line 51V and the second V phase leader line 52V, and the first W phase leader line 51W and the second W phase leader line 52W are predetermined segments, respectively. It is electrically connected to the tip 44 of the conductor 40. Which segment conductors are the 1st U phase leader line 51U and the 2nd U phase leader line 52U, the 1st V phase leader line 51V and the 2nd V phase leader line 52V, and the 1st W phase leader line 51W and the 2nd W phase leader line 52W, respectively. Details of whether or not the tip 44 of the 40 is electrically connected will be described later.

A neutral point 70 is connected to the coil 30. The neutral point 70 is a conductor and may or may not be insulatedly coated. In the present embodiment, the neutral point 70 extends radially outside the coil 30 and is electrically connected to the tip ends 44 of the plurality of segment conductors 40. The details of which segment conductor 40 the tip portion 44 of the neutral point 70 is electrically connected to will be described later.

As shown in FIG. 4B, when viewed from the second end surface 202 side of the stator core 20, on the closed side coil end portion 32 side of the coil 30, the second end portion 41b of the fourth leg portion 414 and the circumferential direction The second end 41b of the fourth leg 414 inserted counterclockwise into the sixth slot 22 is connected by a curved portion 42, and a pair of legs of the U-shaped segment conductor 40. It is 41. Further, the second end portion 41b of the third leg portion 413 and the second end portion 41b of the second leg portion 412 inserted into the fifth slot 22 counterclockwise in the circumferential direction are formed by the curved portion 42. They are connected to form a pair of legs 41 of U-shaped segment conductors 40. Further, the second end portion 41b of the first leg portion 411 and the second end portion 41b of the first leg portion 411 inserted into the sixth slot 22 counterclockwise in the circumferential direction are formed by the curved portion 42. They are connected to form a pair of legs 41 of U-shaped segment conductors 40.

Further, when viewed from the second end surface 202 side of the stator core 20, on the open side coil end portion 31 side of the coil 30, of the four layers of leg portions 41 inserted into each slot 22 of the stator core 20, the first leg portion 411 The slanted portion 43 of the third leg portion 413 is slanted in the counterclockwise direction in the circumferential direction. The oblique portion 43 of the second leg portion 412 and the fourth leg portion 414 is oblique in the clockwise direction in the circumferential direction.

The tip 44 of the first leg 411 is electrically connected to the tip 44 of the second leg 412 inserted into the fifth slot 22 counterclockwise in the circumferential direction, and is second. A joint 452 is formed. Further, the tip 44 of the third leg 413 is electrically connected to the tip 44 of the fourth leg 414 inserted into the fifth slot 22 counterclockwise in the circumferential direction, and is the first. A joint portion 451 is formed.

Therefore, when viewed from the second end surface 202 side of the stator core 20, each of the U-shaped segment conductors 40 has a pair of leg portions 41 arranged by curved portions 42 at intervals of 6 slots in the circumferential direction, and is oblique. The portion 43 and the tip portion 44 are electrically connected to the tip portion 44 of the leg portion 41 of the U-shaped segment conductor 40 separated by 5 slots in the circumferential direction.

Next, the configuration of the V-phase coil 30V among the three-phase coils of the U-phase coil 30U, the V-phase coil 30V, and the W-phase coil 30W constituting the coil 30 will be described.

The V-phase coil 30V is configured by connecting two windings V1 and V2 in parallel. One end of the winding V1 is composed of the tip 44 of the fourth leg 414 inserted into the first slot 2201 and is electrically connected to the first V phase leader line 51V. One end of the winding V2 is composed of the tip 44 of the fourth leg 414 inserted into the second slot 2202, and is electrically connected to the second V phase leader line 52V. The other ends of the windings V1 and V2 are both electrically connected to the neutral point 70.

The winding V1 is on the open side coil end 31 side, starting from the tip 44 of the fourth leg 414 inserted into the first slot 2201, and the fourth leg 414 inserted into the first slot 2201. Is connected to the fourth leg portion 414 inserted into the 43rd slot 2243 by the curved portion 42 on the closed side coil end portion 32 side. The fourth leg portion 414 inserted into the 43rd slot 2243 is connected to the third leg portion 413 inserted into the 48th slot 2248 by the first joint portion 451 on the open side coil end portion 31 side. The third leg portion 413 inserted into the 48th slot 2248 is connected to the second leg portion 412 inserted into the 43rd slot 2243 by the curved portion 42 on the closed side coil end portion 32 side. The second leg portion 412 inserted into the 43rd slot 2243 is connected to the first leg portion 411 inserted into the 48th slot 2248 by the second joint portion 452 on the open side coil end portion 31 side. The first leg portion 411 inserted into the 48th slot 2248 is connected to the first leg portion 411 inserted into the 42nd slot 2242 by the curved portion 42 on the closed side coil end portion 32 side. The first leg portion 411 inserted into the 42nd slot 2242 is connected to the second leg portion 412 inserted into the 37th slot 2237 by the second joint portion 452 on the open side coil end portion 31 side. The second leg portion 412 inserted into the 37th slot 2237 is connected to the third leg portion 413 inserted into the 42nd slot 2242 by the curved portion 42 on the closed side coil end portion 32 side. The third leg portion 413 inserted into the 42nd slot 2242 is connected to the fourth leg portion 414 inserted into the 37th slot 2237 by the first joint portion 451 on the open side coil end portion 31 side. The fourth leg portion 414 inserted into the 37th slot 2237 is connected to the fourth leg portion 414 inserted into the 31st slot 2231 by the curved portion 42 on the closed side coil end portion 32 side. The fourth leg portion 414 inserted into the 31st slot 2231 is connected to the third leg portion 413 inserted into the 36th slot 2236 by the first joint portion 451 on the open side coil end portion 31 side. The third leg portion 413 inserted into the 36th slot 2236 is connected to the second leg portion 412 inserted into the 31st slot 2231 by the curved portion 42 on the closed side coil end portion 32 side. The second leg portion 412 inserted into the 31st slot 2231 is connected to the first leg portion 411 inserted into the 36th slot 2236 by the second joint portion 452 on the open side coil end portion 31 side. The first leg portion 411 inserted into the 36th slot 2236 is connected to the first leg portion 411 inserted into the 30th slot 2230 by the curved portion 42 on the closed side coil end portion 32 side. The first leg portion 411 inserted into the 30th slot 2230 is connected to the second leg portion 412 inserted into the 25th slot 2225 by the second joint portion 452 on the open side coil end portion 31 side. The second leg portion 412 inserted into the 25th slot 2225 is connected to the third leg portion 413 inserted into the 30th slot 2230 by the curved portion 42 on the closed side coil end portion 32 side. The third leg portion 413 inserted into the 30th slot 2230 is connected to the fourth leg portion 414 inserted into the 25th slot 2225 by the first joint portion 451 on the open side coil end portion 31 side. The fourth leg portion 414 inserted into the 25th slot 2225 is connected to the fourth leg portion 414 inserted into the 19th slot 2219 by the curved portion 42 on the closed side coil end portion 32 side. The fourth leg portion 414 inserted into the 19th slot 2219 is connected to the third leg portion 413 inserted into the 24th slot 2224 by the first joint portion 451 on the open side coil end portion 31 side. The third leg portion 413 inserted into the 24th slot 2224 is connected to the second leg portion 412 inserted into the 19th slot 2219 by the curved portion 42 on the closed side coil end portion 32 side. The second leg portion 412 inserted into the 19th slot 2219 is connected to the first leg portion 411 inserted into the 24th slot 2224 by the second joint portion 452 on the open side coil end portion 31 side. The first leg portion 411 inserted into the 24th slot 2224 is connected to the first leg portion 411 inserted into the 18th slot 2218 by the curved portion 42 on the closed side coil end portion 32 side. The first leg portion 411 inserted into the 18th slot 2218 is connected to the second leg portion 412 inserted into the 13th slot 2213 by the second joint portion 452 on the open side coil end portion 31 side. The second leg portion 412 inserted into the thirteenth slot 2213 is connected to the third leg portion 413 inserted into the eighteenth slot 2218 by the curved portion 42 on the closed side coil end portion 32 side. The third leg portion 413 inserted into the 18th slot 2218 is connected to the fourth leg portion 414 inserted into the 13th slot 2213 by the first joint portion 451 on the open side coil end portion 31 side. The fourth leg portion 414 inserted into the thirteenth slot 2213 is connected to the fourth leg portion 414 inserted into the seventh slot 2207 by the curved portion 42 on the closed side coil end portion 32 side. The fourth leg portion 414 inserted into the seventh slot 2207 is connected to the third leg portion 413 inserted into the twelfth slot 2212 by the first joint portion 451 on the open side coil end portion 31 side. The third leg portion 413 inserted into the twelfth slot 2212 is connected to the second leg portion 412 inserted into the seventh slot 2207 by the curved portion 42 on the closed side coil end portion 32 side. The second leg portion 412 inserted into the seventh slot 2207 is connected to the first leg portion 411 inserted into the twelfth slot 2212 by the second joint portion 452 on the open side coil end portion 31 side. The first leg portion 411 inserted into the twelfth slot 2212 is connected to the first leg portion 411 inserted into the sixth slot 2206 by the curved portion 42 on the closed side coil end portion 32 side. The first leg portion 411 inserted into the sixth slot 2206 is connected to the second leg portion 412 inserted into the first slot 2201 by the second joint portion 452 on the open side coil end portion 31 side. The second leg portion 412 inserted into the first slot 2201 is connected to the third leg portion 413 inserted into the sixth slot 2206 by the curved portion 42 on the closed side coil end portion 32 side. The third leg portion 413 inserted into the sixth slot 2206 is on the open side coil end portion 31 side, and the tip portion 44 serves as the end point of the winding V1 and connects to the neutral point 70.

By winding the winding V1 around the stator core 20 in this way, the winding V1 forms eight poles on the stator 10.

The winding V2 is on the open side coil end 31 side, starting from the tip 44 of the fourth leg 414 inserted into the second slot 2202, and the fourth leg 414 inserted into the second slot 2202. Is connected to the fourth leg portion 414 inserted into the 44th slot 2244 by the curved portion 42 on the closed side coil end portion 32 side. The fourth leg portion 414 inserted into the 44th slot 2244 is connected to the third leg portion 413 inserted into the first slot 2201 by the first joint portion 451 on the open side coil end portion 31 side. The third leg portion 413 inserted into the first slot 2201 is connected to the second leg portion 412 inserted into the 44th slot 2244 by the curved portion 42 on the closed side coil end portion 32 side. The second leg portion 412 inserted into the 44th slot 2244 is connected to the first leg portion 411 inserted into the first slot 2201 by the second joint portion 452 on the open side coil end portion 31 side. The first leg portion 411 inserted into the first slot 2201 is connected to the first leg portion 411 inserted into the 43rd slot 2243 by the curved portion 42 on the closed side coil end portion 32 side. The first leg portion 411 inserted into the 43rd slot 2243 is connected to the second leg portion 412 inserted into the 38th slot 2238 by the second joint portion 452 on the open side coil end portion 31 side. The second leg portion 412 inserted into the 38th slot 2238 is connected to the third leg portion 413 inserted into the 43rd slot 2243 by the curved portion 42 on the closed side coil end portion 32 side. The third leg portion 413 inserted into the 43rd slot 2243 is connected to the fourth leg portion 414 inserted into the 38th slot 2238 by the first joint portion 451 on the open side coil end portion 31 side. The fourth leg portion 414 inserted into the 38th slot 2238 is connected to the fourth leg portion 414 inserted into the 32nd slot 2232 by the curved portion 42 on the closed side coil end portion 32 side. The fourth leg portion 414 inserted into the 32nd slot 2232 is connected to the third leg portion 413 inserted into the 37th slot 2237 by the first joint portion 451 on the open side coil end portion 31 side. The third leg portion 413 inserted into the 37th slot 2237 is connected to the second leg portion 412 inserted into the 32nd slot 2232 by the curved portion 42 on the closed side coil end portion 32 side. The second leg portion 412 inserted into the 32nd slot 2232 is connected to the first leg portion 411 inserted into the 37th slot 2237 by the second joint portion 452 on the open side coil end portion 31 side. The first leg portion 411 inserted into the 37th slot 2237 is connected to the first leg portion 411 inserted into the 31st slot 2231 by the curved portion 42 on the closed side coil end portion 32 side. The first leg portion 411 inserted into the 31st slot 2231 is connected to the second leg portion 412 inserted into the 26th slot 2226 by the second joint portion 452 on the open side coil end portion 31 side. The second leg portion 412 inserted into the 26th slot 2226 is connected to the third leg portion 413 inserted into the 31st slot 2231 by the curved portion 42 on the closed side coil end portion 32 side. The third leg portion 413 inserted into the 31st slot 2231 is connected to the fourth leg portion 414 inserted into the 26th slot 2226 by the first joint portion 451 on the open side coil end portion 31 side. The fourth leg portion 414 inserted into the 26th slot 2226 is connected to the fourth leg portion 414 inserted into the 20th slot 2220 by the curved portion 42 on the closed side coil end portion 32 side. The fourth leg portion 414 inserted into the 20th slot 2220 is connected to the third leg portion 413 inserted into the 25th slot 2225 by the first joint portion 451 on the open side coil end portion 31 side. The third leg portion 413 inserted into the 25th slot 2225 is connected to the second leg portion 412 inserted into the 20th slot 2220 by the curved portion 42 on the closed side coil end portion 32 side. The second leg portion 412 inserted into the 20th slot 2220 is connected to the first leg portion 411 inserted into the 25th slot 2225 by the second joint portion 452 on the open side coil end portion 31 side. The first leg portion 411 inserted into the 25th slot 2225 is connected to the first leg portion 411 inserted into the 19th slot 2219 by the curved portion 42 on the closed side coil end portion 32 side. The first leg portion 411 inserted into the 19th slot 2219 is connected to the second leg portion 412 inserted into the 14th slot 2214 by the second joint portion 452 on the open side coil end portion 31 side. The second leg portion 412 inserted into the 14th slot 2214 is connected to the third leg portion 413 inserted into the 19th slot 2219 by the curved portion 42 on the closed side coil end portion 32 side. The third leg portion 413 inserted into the 19th slot 2219 is connected to the fourth leg portion 414 inserted into the 14th slot 2214 by the first joint portion 451 on the open side coil end portion 31 side. The fourth leg portion 414 inserted into the 14th slot 2214 is connected to the fourth leg portion 414 inserted into the eighth slot 2208 by the curved portion 42 on the closed side coil end portion 32 side. The fourth leg portion 414 inserted into the eighth slot 2208 is connected to the third leg portion 413 inserted into the thirteenth slot 2213 by the first joint portion 451 on the open side coil end portion 31 side. The third leg portion 413 inserted into the thirteenth slot 2213 is connected to the second leg portion 412 inserted into the eighth slot 2208 by the curved portion 42 on the closed side coil end portion 32 side. The second leg portion 412 inserted into the eighth slot 2208 is connected to the first leg portion 411 inserted into the thirteenth slot 2213 by the second joint portion 452 on the open side coil end portion 31 side. The first leg portion 411 inserted into the thirteenth slot 2213 is connected to the first leg portion 411 inserted into the seventh slot 2207 by the curved portion 42 on the closed side coil end portion 32 side. The first leg portion 411 inserted into the seventh slot 2207 is connected to the second leg portion 412 inserted into the second slot 2202 by the second joint portion 452 on the open side coil end portion 31 side. The second leg portion 412 inserted into the second slot 2202 is connected to the third leg portion 413 inserted into the seventh slot 2207 by the curved portion 42 on the closed side coil end portion 32 side. The third leg portion 413 inserted into the seventh slot 2207 is on the open side coil end portion 31 side, and the tip portion 44 serves as the end point of the winding V2 and connects to the neutral point 70.

By winding the winding V2 around the stator core 20 in this way, the winding V2 forms eight poles on the stator 10. The winding V2 is formed so as to be wound in the same manner as the winding V1 at a position displaced by one slot clockwise from the winding V1 when viewed from the second end surface 202 side of the stator core 20. ..

Returning to (a) of FIG. 4, the U-phase coil 30U is configured by connecting two windings U1 and U2 in parallel, similarly to the V-phase coil 30V. One end of the winding U1 is electrically connected to the first U phase leader wire 51U, and one end of the winding U2 is electrically connected to the second U phase leader 52U. The other ends of the windings U1 and U2 are both electrically connected to the neutral point 70.

One end of the winding U1 is formed by the tip 44 of the fourth leg 414 inserted into the 45th slot 2245 on the open side coil end 31 side, and is electrically connected to the 1st U phase leader wire 51U. doing.

The winding U1 is wound on the open side coil end 31 side, starting from the tip 44 of the fourth leg 414 inserted into the 45th slot 2245, and viewed from the second end surface 202 side of the stator core 20. It is formed so as to be wound in the same manner as the winding V1 at a position deviated by 4 slots counterclockwise from V1 in the circumferential direction. Then, the winding U1 forms eight poles on the stator 10, and the tip portion 44 of the third leg portion 413 inserted into the second slot 2202 on the open side coil end portion 31 side is the winding U1. It becomes the end point and connects to the neutral point 70.

One end of the winding U2 is formed on the open side coil end 31 side by the tip 44 of the fourth leg 414 inserted into the 46th slot 2246, and is electrically connected to the second U phase leader 52U. doing.

The winding U2 is wound on the open side coil end 31 side, starting from the tip 44 of the fourth leg 414 inserted into the 46th slot 2246, as viewed from the second end surface 202 side of the stator core 20. It is formed so as to be wound in the same manner as the winding V2 at a position deviated by 4 slots counterclockwise from V2 in the circumferential direction. Then, the winding U2 forms eight poles on the stator 10, and the tip portion 44 of the third leg portion 413 inserted into the third slot 2203 on the open side coil end portion 31 side is formed on the winding U2. It becomes the end point and connects to the neutral point 70.

The W-phase coil 30W is configured by connecting two windings W1 and W2 in parallel, similarly to the U-phase coil 30U and the V-phase coil 30V. One end of the winding W1 is electrically connected to the first W phase leader line 51W, and one end of the winding W2 is electrically connected to the second W phase leader 52W. The other ends of the windings W1 and W2 are both electrically connected to the neutral point 70.

One end of the winding W1 is formed on the open side coil end 31 side by the tip 44 of the fourth leg 414 inserted into the fifth slot 2205, and is electrically connected to the first W phase leader 51W. doing.

The winding W1 is wound on the open side coil end 31 side, starting from the tip 44 of the fourth leg 414 inserted into the fifth slot 2205, and viewed from the second end surface 202 side of the stator core 20. It is formed so as to be wound in the same manner as the winding V1 at a position displaced by 4 slots clockwise from V1 in the circumferential direction. Then, the winding W1 forms eight poles on the stator 10, and the tip portion 44 of the third leg portion 413 inserted into the tenth slot 2210 on the open side coil end portion 31 side is the winding W1. It becomes the end point and connects to the neutral point 70.

One end of the winding W2 is formed on the open side coil end 31 side by the tip 44 of the fourth leg 414 inserted into the sixth slot 2206, and is electrically connected to the second W phase leader 52W. doing.

The winding W2 is wound on the open side coil end 31 side, starting from the tip 44 of the fourth leg 414 inserted into the sixth slot 2206, and viewed from the second end surface 202 side of the stator core 20. It is formed so as to be wound in the same manner as the winding V2 at a position displaced by 4 slots clockwise from V2 in the circumferential direction. Then, the winding W2 forms eight poles on the stator 10, and the tip portion 44 of the third leg portion 413 inserted into the eleventh slot 2211 on the open side coil end portion 31 side is formed on the winding W2. It becomes the end point and connects to the neutral point 70.

Therefore, the slot 22 of the stator core 20 is the first slot in which the V-phase segment conductor 40 is inserted, the second slot in which the V-phase segment conductor 40 and the U-phase segment conductor 40 are inserted, and the U-phase segment conductor. The third slot in which 40 is inserted, the fourth slot in which the U-phase segment conductor 40 and the W-phase segment conductor 40 are inserted, the fifth slot in which the W-phase segment conductor 40 is inserted, and the W-phase segment conductor The sixth slot into which the 40 and the V-phase segment conductor 40 are inserted is periodically arranged in this order in the circumferential direction. In the present embodiment, the 1st slot 2201, the 7th slot 2207, the 13th slot 2213, the 19th slot 2219, the 25th slot 2225, the 31st slot 2231, the 37th slot 2237, and the 43rd slot. Slot 2243 is the 1st slot, the 2nd slot 2202, the 8th slot 2208, the 14th slot 2214, the 20th slot 2220, the 26th slot 2226, the 32nd slot 2232, the 38th slot 2238, and the 38th slot. The 44th slot 2244 is the 2nd slot, the 3rd slot 2203, the 9th slot 2209, the 15th slot 2215, the 21st slot 2221, the 27th slot 2227, the 33rd slot 2233, and the 39th slot 2239. , 45th slot 2245 is the 3rd slot, 4th slot 2204, 10th slot 2210, 16th slot 2216, 22nd slot 2222, 28th slot 2228, 34th slot 2234, 40th Slot 2240, 46th slot 2246 is 4th slot, 5th slot 2205, 11th slot 2211, 17th slot 2217, 23rd slot 2223, 29th slot 2229, 35th slot 2235, 35th slot The 41st slot 2241 and the 47th slot 2247 are the 5th slot, the 6th slot 2206, the 12th slot 2212, the 18th slot 2218, the 24th slot 2224, the 30th slot 2230, and the 36th slot 2236. , The 42nd slot 2242 and the 48th slot 2248 are configured as the 6th slot.

As a result, since the segment conductor 40 of each phase is inserted into the three adjacent slots 22, the loss and torque ripple that occur when the rotary electric machine is driven can be reduced.

Further, by winding the windings U1, U2, V1, V2, W1, and W2 in each slot 22 in this way, the coil 30 electrically connects two tip portions 44 of the segment conductors 40 having the same phase but different from each other. The leg 41 (fourth in the present embodiment) in which the U-phase leader line 50U, the V-phase leader line 50V, and the W-phase leader line 50W are arranged in the outermost layer in the radial direction of the slot 22 without using a connecting bridge. It can be configured to connect to the tip 44 of the fourth leg 414) arranged in the layer. Further, the neutral point 70 is the tip portion 44 of the leg portion 41 (in the present embodiment, the third leg portion 413 arranged in the third layer) arranged in the second layer from the outermost layer in the radial direction of the slot 22. Can be configured to connect.

Therefore, the U-phase leader line 50U, the V-phase leader line 50V, the W-phase leader line 50W, and the neutral point 70 can be arranged on the outer side in the radial direction of the open side coil end portion 31. As a result, the U-phase leader line 50U, the V-phase leader line 50V, the W-phase leader line 50W, and the neutral point 70 can be made into a simple shape, so that the U-phase leader line 50U, the V-phase leader line 50V, W The manufacturing cost of the phase leader line 50W and the neutral point 70 can be reduced. Further, since the total lengths of the U-phase leader line 50U, the V-phase leader line 50V, the W-phase leader line 50W, and the neutral point 70 can be shortened, the vibration resistance is improved. Further, the manufacturing process when arranging the U-phase leader wire 50U, the V-phase leader wire 50V, the W-phase leader wire 50W, and the neutral point 70 on the stator 10 becomes easy.

As shown in FIG. 5A, in the conventional stator of Patent Document 1, segment conductors constituting windings of the same phase are inserted in each slot. The U-phase, V-phase, and W-phase are arranged side by side in two slots, and the curved portion, the oblique portion, and the tip portion connect the two legs at intervals of 6 slots. ..

In the present embodiment, in the U-shaped segment conductor 40, the oblique portion 43 and the tip portion 44 connect the two leg portions 41 at intervals of 5 slots. Therefore, as shown in FIG. 5B, the height of the oblique portion 43 in the axial direction is lower than that in the case where the two legs are connected at the conventional 6-slot interval, and the oblique portion 43 is formed. The length of is shortened. As a result, the resistance of the windings U1, U2, V1, V2, W1 and W2 is reduced, so that the output efficiency of the rotary electric machine is improved.

[Second Embodiment]
Subsequently, the stator 10 of the second embodiment of the present invention will be described with reference to FIG. In the following description, the same components as those of the stator 10 of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted or simplified. The stator 10 of the second embodiment is different from the stator 10 of the first embodiment in the way of winding the windings U1, U2, V1, V2, W1 and W2 that wind each slot 22 of the stator core 20. Hereinafter, how to wind each winding in the stator 10 of the second embodiment will be described in detail.

With reference to FIG. 6, the configuration of the coil 30 by the segment conductors 40 inserted into each slot 22 of the stator core 20 will be described. For the sake of simplicity and clarity, the 48 slots 22 of the stator core 20 are, for convenience, the first slot clockwise as shown in FIG. 2 when viewed from the second end surface 202 side of the stator core 20. It is set to 2201 to the 48th slot 2248. In FIG. 6, the numbers shown at the upper part of the horizontal axis indicate the slot numbers, and 1 to 48 correspond to the 1st slot 2201 to the 48th slot 2248, respectively. The numbers circled at the left end of the vertical axis indicate the layer numbers of the legs 41 inserted into each slot 22, and 1 to 4 are the first leg 411 to the fourth leg, respectively. Corresponds to 414.

As shown in FIG. 6B, when viewed from the second end surface 202 side of the stator core 20, on the closed side coil end portion 32 side of the coil 30, the second end portion 41b of the fourth leg portion 414 and the circumferential direction The second end 41b of the fourth leg 414 inserted clockwise into the sixth slot 22 is connected by the curved portion 42, and the pair of legs 41 of the U-shaped segment conductor 40 is connected. It has become. Further, the second end 41b of the third leg 413 and the second end 41b of the second leg 412 inserted into the seventh slot 22 clockwise in the circumferential direction are connected by the curved portion 42. It is a pair of leg portions 41 of a U-shaped segment conductor 40. Further, the second end portion 41b of the first leg portion 411 and the second end portion 41b of the first leg portion 411 inserted into the sixth slot 22 counterclockwise in the circumferential direction are formed by the curved portion 42. They are connected to form a pair of legs 41 of U-shaped segment conductors 40.

Further, when viewed from the second end surface 202 side of the stator core 20, on the open side coil end portion 31 side of the coil 30, of the four layers of leg portions 41 inserted into each slot 22 of the stator core 20, the first leg portion 411 The slanted portion 43 of the third leg portion 413 is slanted in the counterclockwise direction in the circumferential direction. The oblique portion 43 of the second leg portion 412 and the fourth leg portion 414 is oblique in the clockwise direction in the circumferential direction.

The tip 44 of the first leg 411 is electrically connected to the tip 44 of the second leg 412 inserted into the fifth slot 22 counterclockwise in the circumferential direction, and is second. A joint 452 is formed. Further, the tip portion 44 of the fourth leg portion 414 is electrically connected to the tip portion 44 of the third leg portion 413 inserted into the fifth slot 22 clockwise in the circumferential direction, and is first joined. The portion 451 is formed.

Therefore, when viewed from the second end surface 202 side of the stator core 20, in the U-shaped segment conductor 40, the fourth leg portions 414 separated by 6 slots in the circumferential direction are connected to each other by the curved portion 42, and 6 in the circumferential direction. The first leg portions 411 separated by slots are connected to each other by the curved portion 42, and the second leg portion 412 and the third leg portion 413 separated by 7 slots in the circumferential direction are connected by the curved portion 42. Further, when viewed from the second end surface 202 side of the stator core 20, the U-shaped segment conductor 40 is a U-shaped segment conductor 40 in which the oblique portion 43 and the tip portion 44 are separated by 5 slots in the circumferential direction. It is electrically connected to the tip 44 of the leg 41.

Next, the configuration of the V-phase coil 30V among the three-phase coils of the U-phase coil 30U, the V-phase coil 30V, and the W-phase coil 30W constituting the coil 30 will be described.

The V-phase coil 30V is configured by connecting two windings V1 and V2 in parallel. One end of the winding V1 is composed of the tip 44 of the fourth leg 414 inserted into the second slot 2202, and is electrically connected to the first V phase leader line 51V. One end of the winding V2 is composed of the tip 44 of the fourth leg 414 inserted into the first slot 2201 and is electrically connected to the second V phase leader 52V. The other ends of the windings V1 and V2 are both electrically connected to the neutral point 70.

The winding V1 is on the open side coil end 31 side, starting from the tip 44 of the fourth leg 414 inserted into the second slot 2202, and the fourth leg 414 inserted into the second slot 2202. Is connected to the fourth leg portion 414 inserted into the eighth slot 2208 by the curved portion 42 on the closed side coil end portion 32 side. The fourth leg portion 414 inserted into the eighth slot 2208 is connected to the third leg portion 413 inserted into the thirteenth slot 2213 by the first joint portion 451 on the open side coil end portion 31 side. The third leg portion 413 inserted into the thirteenth slot 2213 is connected to the second leg portion 412 inserted into the twentyth slot 2220 by the curved portion 42 on the closed side coil end portion 32 side. The second leg portion 412 inserted into the 20th slot 2220 is connected to the first leg portion 411 inserted into the 25th slot 2225 by the second joint portion 452 on the open side coil end portion 31 side. The first leg portion 411 inserted into the 25th slot 2225 is connected to the first leg portion 411 inserted into the 31st slot 2231 by the curved portion 42 on the closed side coil end portion 32 side. The first leg portion 411 inserted into the 31st slot 2231 is connected to the second leg portion 412 inserted into the 26th slot 2226 by the second joint portion 452 on the open side coil end portion 31 side. The second leg portion 412 inserted into the 26th slot 2226 is connected to the third leg portion 413 inserted into the 19th slot 2219 by the curved portion 42 on the closed side coil end portion 32 side. The third leg portion 413 inserted into the 19th slot 2219 is connected to the fourth leg portion 414 inserted into the 14th slot 2214 by the first joint portion 451 on the open side coil end portion 31 side. The fourth leg portion 414 inserted into the 14th slot 2214 is connected to the fourth leg portion 414 inserted into the 20th slot 2220 by the curved portion 42 on the closed side coil end portion 32 side. The fourth leg portion 414 inserted into the 20th slot 2220 is connected to the third leg portion 413 inserted into the 25th slot 2225 by the first joint portion 451 on the open side coil end portion 31 side. The third leg portion 413 inserted into the 25th slot 2225 is connected to the second leg portion 412 inserted into the 32nd slot 2232 by the curved portion 42 on the closed side coil end portion 32 side. The second leg portion 412 inserted into the 32nd slot 2232 is connected to the first leg portion 411 inserted into the 37th slot 2237 by the second joint portion 452 on the open side coil end portion 31 side. The first leg portion 411 inserted into the 37th slot 2237 is connected to the first leg portion 411 inserted into the 43rd slot 2243 by the curved portion 42 on the closed side coil end portion 32 side. The first leg portion 411 inserted into the 43rd slot 2243 is connected to the second leg portion 412 inserted into the 38th slot 2238 by the second joint portion 452 on the open side coil end portion 31 side. The second leg portion 412 inserted into the 38th slot 2238 is connected to the third leg portion 413 inserted into the 31st slot 2231 by the curved portion 42 on the closed side coil end portion 32 side. The third leg portion 413 inserted into the 31st slot 2231 is connected to the fourth leg portion 414 inserted into the 26th slot 2226 by the first joint portion 451 on the open side coil end portion 31 side. The fourth leg portion 414 inserted into the 26th slot 2226 is connected to the fourth leg portion 414 inserted into the 32nd slot 2232 by the curved portion 42 on the closed side coil end portion 32 side. The fourth leg portion 414 inserted into the 32nd slot 2232 is connected to the third leg portion 413 inserted into the 37th slot 2237 by the first joint portion 451 on the open side coil end portion 31 side. The third leg portion 413 inserted into the 37th slot 2237 is connected to the second leg portion 412 inserted into the 44th slot 2244 by the curved portion 42 on the closed side coil end portion 32 side. The second leg portion 412 inserted into the 44th slot 2244 is connected to the first leg portion 411 inserted into the first slot 2201 by the second joint portion 452 on the open side coil end portion 31 side. The first leg portion 411 inserted into the first slot 2201 is connected to the first leg portion 411 inserted into the seventh slot 2207 by the curved portion 42 on the closed side coil end portion 32 side. The first leg portion 411 inserted into the seventh slot 2207 is connected to the second leg portion 412 inserted into the second slot 2202 by the second joint portion 452 on the open side coil end portion 31 side. The second leg portion 412 inserted into the second slot 2202 is connected to the third leg portion 413 inserted into the 43rd slot 2243 by the curved portion 42 on the closed side coil end portion 32 side. The third leg portion 413 inserted into the 43rd slot 2243 is connected to the fourth leg portion 414 inserted into the 38th slot 2238 by the first joint portion 451 on the open side coil end portion 31 side. The fourth leg portion 414 inserted into the 38th slot 2238 is connected to the fourth leg portion 414 inserted into the 44th slot 2244 by the curved portion 42 on the closed side coil end portion 32 side. The fourth leg portion 414 inserted into the 44th slot 2244 is connected to the third leg portion 413 inserted into the first slot 2201 by the first joint portion 451 on the open side coil end portion 31 side. The third leg portion 413 inserted into the first slot 2201 is connected to the second leg portion 412 inserted into the eighth slot 2208 by the curved portion 42 on the closed side coil end portion 32 side. The second leg portion 412 inserted into the eighth slot 2208 is connected to the first leg portion 411 inserted into the thirteenth slot 2213 by the second joint portion 452 on the open side coil end portion 31 side. The first leg portion 411 inserted into the 13th slot 2213 is connected to the first leg portion 411 inserted into the 19th slot 2219 by the curved portion 42 on the closed side coil end portion 32 side. The first leg portion 411 inserted into the 19th slot 2219 is connected to the second leg portion 412 inserted into the 14th slot 2214 by the second joint portion 452 on the open side coil end portion 31 side. The second leg portion 412 inserted into the 14th slot 2214 is connected to the third leg portion 413 inserted into the 7th slot 2207 by the curved portion 42 on the closed side coil end portion 32 side. The third leg portion 413 inserted into the seventh slot 2207 is on the open side coil end portion 31 side, and the tip portion 44 serves as the end point of the winding V1 and connects to the neutral point 70.

By winding the winding V1 around the stator core 20 in this way, the winding V1 forms eight poles on the stator 10.

The winding V2 is on the open side coil end 31 side, starting from the tip 44 of the fourth leg 414 inserted into the first slot 2201, and the fourth leg 414 inserted into the first slot 2201. Is connected to the fourth leg portion 414 inserted into the seventh slot 2207 by the curved portion 42 on the closed side coil end portion 32 side. The fourth leg portion 414 inserted into the seventh slot 2207 is connected to the third leg portion 413 inserted into the twelfth slot 2212 by the first joint portion 451 on the open side coil end portion 31 side. The third leg portion 413 inserted into the twelfth slot 2212 is connected to the second leg portion 412 inserted into the 19th slot 2219 by the curved portion 42 on the closed side coil end portion 32 side. The second leg portion 412 inserted into the 19th slot 2219 is connected to the first leg portion 411 inserted into the 24th slot 2224 by the second joint portion 452 on the open side coil end portion 31 side. The first leg portion 411 inserted into the 24th slot 2224 is connected to the first leg portion 411 inserted into the 30th slot 2230 by the curved portion 42 on the closed side coil end portion 32 side. The first leg portion 411 inserted into the 30th slot 2230 is connected to the second leg portion 412 inserted into the 25th slot 2225 by the second joint portion 452 on the open side coil end portion 31 side. The second leg portion 412 inserted into the 25th slot 2225 is connected to the third leg portion 413 inserted into the 18th slot 2218 by the curved portion 42 on the closed side coil end portion 32 side. The third leg portion 413 inserted into the 18th slot 2218 is connected to the fourth leg portion 414 inserted into the 13th slot 2213 by the first joint portion 451 on the open side coil end portion 31 side. The fourth leg portion 414 inserted into the thirteenth slot 2213 is connected to the fourth leg portion 414 inserted into the 19th slot 2219 by the curved portion 42 on the closed side coil end portion 32 side. The fourth leg portion 414 inserted into the 19th slot 2219 is connected to the third leg portion 413 inserted into the 24th slot 2224 by the first joint portion 451 on the open side coil end portion 31 side. The third leg portion 413 inserted into the 24th slot 2224 is connected to the second leg portion 412 inserted into the 31st slot 2231 by the curved portion 42 on the closed side coil end portion 32 side. The second leg portion 412 inserted into the 31st slot 2231 is connected to the first leg portion 411 inserted into the 36th slot 2236 by the second joint portion 452 on the open side coil end portion 31 side. The first leg portion 411 inserted into the 36th slot 2236 is connected to the first leg portion 411 inserted into the 42nd slot 2242 by the curved portion 42 on the closed side coil end portion 32 side. The first leg portion 411 inserted into the 42nd slot 2242 is connected to the second leg portion 412 inserted into the 37th slot 2237 by the second joint portion 452 on the open side coil end portion 31 side. The second leg portion 412 inserted into the 37th slot 2237 is connected to the third leg portion 413 inserted into the 30th slot 2230 by the curved portion 42 on the closed side coil end portion 32 side. The third leg portion 413 inserted into the 30th slot 2230 is connected to the fourth leg portion 414 inserted into the 25th slot 2225 by the first joint portion 451 on the open side coil end portion 31 side. The fourth leg portion 414 inserted into the 25th slot 2225 is connected to the fourth leg portion 414 inserted into the 31st slot 2231 by the curved portion 42 on the closed side coil end portion 32 side. The fourth leg portion 414 inserted into the 31st slot 2231 is connected to the third leg portion 413 inserted into the 36th slot 2236 by the first joint portion 451 on the open side coil end portion 31 side. The third leg portion 413 inserted into the 36th slot 2236 is connected to the second leg portion 412 inserted into the 43rd slot 2243 by the curved portion 42 on the closed side coil end portion 32 side. The second leg portion 412 inserted into the 43rd slot 2243 is connected to the first leg portion 411 inserted into the 48th slot 2248 by the second joint portion 452 on the open side coil end portion 31 side. The first leg portion 411 inserted into the 48th slot 2248 is connected to the first leg portion 411 inserted into the sixth slot 2206 by the curved portion 42 on the closed side coil end portion 32 side. The first leg portion 411 inserted into the sixth slot 2206 is connected to the second leg portion 412 inserted into the first slot 2201 by the second joint portion 452 on the open side coil end portion 31 side. The second leg portion 412 inserted into the first slot 2201 is connected to the third leg portion 413 inserted into the 42nd slot 2242 by the curved portion 42 on the closed side coil end portion 32 side. The third leg portion 413 inserted into the 42nd slot 2242 is connected to the fourth leg portion 414 inserted into the 37th slot 2237 by the first joint portion 451 on the open side coil end portion 31 side. The fourth leg portion 414 inserted into the 37th slot 2237 is connected to the fourth leg portion 414 inserted into the 43rd slot 2243 by the curved portion 42 on the closed side coil end portion 32 side. The fourth leg portion 414 inserted into the 43rd slot 2243 is connected to the third leg portion 413 inserted into the 48th slot 2248 by the first joint portion 451 on the open side coil end portion 31 side. The third leg portion 413 inserted into the 48th slot 2248 is connected to the second leg portion 412 inserted into the seventh slot 2207 by the curved portion 42 on the closed side coil end portion 32 side. The second leg portion 412 inserted into the seventh slot 2207 is connected to the first leg portion 411 inserted into the twelfth slot 2212 by the second joint portion 452 on the open side coil end portion 31 side. The first leg portion 411 inserted into the twelfth slot 2212 is connected to the first leg portion 411 inserted into the eighteenth slot 2218 by the curved portion 42 on the closed side coil end portion 32 side. The first leg portion 411 inserted into the 18th slot 2218 is connected to the second leg portion 412 inserted into the 13th slot 2213 by the second joint portion 452 on the open side coil end portion 31 side. The second leg portion 412 inserted into the thirteenth slot 2213 is connected to the third leg portion 413 inserted into the sixth slot 2206 by the curved portion 42 on the closed side coil end portion 32 side. The third leg portion 413 inserted into the sixth slot 2206 is on the open side coil end portion 31 side, and the tip portion 44 serves as the end point of the winding V2 and connects to the neutral point 70.

By winding the winding V2 around the stator core 20 in this way, the winding V2 forms eight poles on the stator 10. The winding V2 is formed so as to be wound in the same manner as the winding V1 at a position shifted by one slot counterclockwise from the winding V1 when viewed from the second end surface 202 side of the stator core 20. NS.

As shown in FIG. 6A, the U-phase coil 30U is configured by connecting two windings U1 and U2 in parallel, similarly to the V-phase coil 30V. Each of the windings U1 and U2 is wound clockwise when viewed radially outward from the central axis CL of the stator core 20. One end of the winding U1 is electrically connected to the first U phase leader wire 51U, and one end of the winding U2 is electrically connected to the second U phase leader 52U. The other ends of the windings U1 and U2 are both electrically connected to the neutral point 70.

One end of the winding U1 is formed by the tip 44 of the fourth leg 414 inserted into the 46th slot 2246 on the open side coil end 31 side, and is electrically connected to the 1st U phase leader line 51U. doing.

The winding U1 is wound on the open side coil end 31 side, starting from the tip 44 of the fourth leg 414 inserted into the 46th slot 2246, as viewed from the second end surface 202 side of the stator core 20. It is formed so as to be wound in the same manner as the winding V1 at a position deviated by 4 slots counterclockwise from V1 in the circumferential direction. Then, the winding U1 forms eight poles on the stator 10, and the tip portion 44 of the third leg portion 413 inserted into the third slot 2203 on the open side coil end portion 31 side is formed on the winding U1. It becomes the end point and connects to the neutral point 70.

One end of the winding U2 is formed on the open side coil end 31 side by the tip 44 of the fourth leg 414 inserted into the 45th slot 2245, and is electrically connected to the second U phase leader 52U. doing.

The winding U2 is wound on the open side coil end 31 side, starting from the tip 44 of the fourth leg 414 inserted into the 45th slot 2245, and viewed from the second end surface 202 side of the stator core 20. It is formed so as to be wound in the same manner as the winding V2 at a position deviated by 4 slots counterclockwise from V2 in the circumferential direction. Then, the winding U2 forms eight poles on the stator 10, and the tip portion 44 of the third leg portion 413 inserted into the second slot 2202 on the open side coil end portion 31 side is formed on the winding U2. It becomes the end point and connects to the neutral point 70.

The W-phase coil 30W is configured by connecting two windings W1 and W2 in parallel, similarly to the U-phase coil 30U and the V-phase coil 30V. One end of the winding W1 is electrically connected to the first W phase leader line 51W, and one end of the winding W2 is electrically connected to the second W phase leader 52W. The other ends of the windings W1 and W2 are both electrically connected to the neutral point 70.

One end of the winding W1 is formed on the open side coil end 31 side by the tip 44 of the fourth leg 414 inserted into the sixth slot 2206, and is electrically connected to the first W phase leader 51W. doing.

The winding W1 is wound on the open side coil end 31 side, starting from the tip 44 of the fourth leg 414 inserted into the sixth slot 2206, and viewed from the second end surface 202 side of the stator core 20. It is formed so as to be wound in the same manner as the winding V1 at a position displaced by 4 slots clockwise from V1 in the circumferential direction. Then, the winding W1 forms eight poles on the stator 10, and the tip portion 44 of the third leg portion 413 inserted into the eleventh slot 2211 on the open side coil end portion 31 side is the winding W1. It becomes the end point and connects to the neutral point 70.

One end of the winding W2 is formed on the open side coil end 31 side by the tip 44 of the fourth leg 414 inserted into the fifth slot 2205, and is electrically connected to the second W phase leader 52W. doing.

The winding W2 is wound on the open side coil end 31 side, starting from the tip 44 of the fourth leg 414 inserted into the fifth slot 2205, and viewed from the second end surface 202 side of the stator core 20. It is formed so as to be wound in the same manner as the winding V2 at a position displaced by 4 slots clockwise from V2 in the circumferential direction. Then, the winding W2 forms eight poles on the stator 10, and the tip portion 44 of the third leg portion 413 inserted into the tenth slot 2210 on the open side coil end portion 31 side is formed on the winding W2. It becomes the end point and connects to the neutral point 70.

Therefore, each slot 22 of the stator core 20 is a first slot in which the V-phase segment conductor 40 is inserted, a second slot in which the V-phase segment conductor 40 and the U-phase segment conductor 40 are inserted, and a U-phase segment. The third slot in which the conductor 40 is inserted, the fourth slot in which the U-phase segment conductor 40 and the W-phase segment conductor 40 are inserted, the fifth slot in which the W-phase segment conductor 40 is inserted, and the W-phase segment. The sixth slot into which the conductor 40 and the V-phase segment conductor 40 are inserted is periodically arranged in this order in the circumferential direction. In the present embodiment, the 1st slot 2201, the 7th slot 2207, the 13th slot 2213, the 19th slot 2219, the 25th slot 2225, the 31st slot 2231, the 37th slot 2237, and the 43rd slot. Slot 2243 is the 1st slot, the 2nd slot 2202, the 8th slot 2208, the 14th slot 2214, the 20th slot 2220, the 26th slot 2226, the 32nd slot 2232, the 38th slot 2238, and the 38th slot. The 44th slot 2244 is the 2nd slot, the 3rd slot 2203, the 9th slot 2209, the 15th slot 2215, the 21st slot 2221, the 27th slot 2227, the 33rd slot 2233, and the 39th slot 2239. , 45th slot 2245 is the 3rd slot, 4th slot 2204, 10th slot 2210, 16th slot 2216, 22nd slot 2222, 28th slot 2228, 34th slot 2234, 40th Slot 2240, 46th slot 2246 is 4th slot, 5th slot 2205, 11th slot 2211, 17th slot 2217, 23rd slot 2223, 29th slot 2229, 35th slot 2235, 35th slot The 41st slot 2241 and the 47th slot 2247 are the 5th slot, the 6th slot 2206, the 12th slot 2212, the 18th slot 2218, the 24th slot 2224, the 30th slot 2230, and the 36th slot 2236. , The 42nd slot 2242 and the 48th slot 2248 are configured as the 6th slot.

As a result, since the segment conductor 40 of each phase is inserted into the three adjacent slots 22, the loss and torque ripple that occur when the rotary electric machine is driven can be reduced.

Further, by winding the windings U1, U2, V1, V2, W1, and W2 in each slot 22 in this way, the coil 30 electrically connects two tip portions 44 of the segment conductors 40 having the same phase but different from each other. The leg 41 (fourth in the present embodiment) in which the U-phase leader line 50U, the V-phase leader line 50V, and the W-phase leader line 50W are arranged in the outermost layer in the radial direction of the slot 22 without using a connecting bridge. It can be configured to connect to the tip 44 of the fourth leg 414) arranged in the layer. Further, the neutral point 70 is the tip portion 44 of the leg portion 41 (in the present embodiment, the third leg portion 413 arranged in the third layer) arranged in the second layer from the outermost layer in the radial direction of the slot 22. Can be configured to connect.

Therefore, the U-phase leader line 50U, the V-phase leader line 50V, the W-phase leader line 50W, and the neutral point 70 can be arranged on the outer side in the radial direction of the open side coil end portion 31. As a result, the U-phase leader line 50U, the V-phase leader line 50V, the W-phase leader line 50W, and the neutral point 70 can be made into a simple shape, so that the U-phase leader line 50U, the V-phase leader line 50V, W The manufacturing cost of the phase leader line 50W and the neutral point 70 can be reduced. Further, since the total lengths of the U-phase leader line 50U, the V-phase leader line 50V, the W-phase leader line 50W, and the neutral point 70 can be shortened, the vibration resistance is improved. Further, the manufacturing process when arranging the U-phase leader wire 50U, the V-phase leader wire 50V, the W-phase leader wire 50W, and the neutral point 70 on the stator 10 becomes easy.

Further, in the U-shaped segment conductor 40, since the oblique portion 43 and the tip portion 44 connect the two leg portions 41 at 5 slot intervals, the two legs are connected at the conventional 6 slot intervals. The height of the skewed portion 43 in the axial direction is lower than that of the case where the skewed portion 43 is used, and the length of the skewed portion 43 is shortened. As a result, the resistance of the windings U1, U2, V1, V2, W1 and W2 is reduced, so that the output efficiency of the rotary electric machine is improved.

[Third Embodiment]
Subsequently, the stator 10 of the third embodiment of the present invention will be described with reference to FIG. 7. In the following description, the same components as those of the stator 10 of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted or simplified. The stator 10 of the third embodiment is different from the stator 10 of the first embodiment in the way of winding the windings U1, U2, V1, V2, W1 and W2 that wind each slot 22 of the stator core 20. Hereinafter, how to wind each winding in the stator 10 of the third embodiment will be described in detail.

The configuration of the coil 30 by the segment conductors 40 inserted into each slot 22 of the stator core 20 will be described with reference to FIG. 7. For the sake of simplicity and clarity, the 48 slots 22 of the stator core 20 are, for convenience, the first slot clockwise as shown in FIG. 2 when viewed from the second end surface 202 side of the stator core 20. It is set to 2201 to the 48th slot 2248. In FIG. 7, the numbers shown at the upper part of the horizontal axis indicate the slot numbers, and 1 to 48 correspond to the 1st slot 2201 to the 48th slot 2248, respectively. The numbers circled at the left end of the vertical axis indicate the layer numbers of the legs 41 inserted into each slot 22, and 1 to 4 are the first leg 411 to the fourth leg, respectively. Corresponds to 414.

As shown in FIG. 7B, when viewed from the second end surface 202 side of the stator core 20, on the closed side coil end portion 32 side of the coil 30, the second end portion 41b of the fourth leg portion 414 and the circumferential direction The second end 41b of the fourth leg 414 inserted clockwise into the sixth slot 22 is connected by the curved portion 42, and the pair of legs 41 of the U-shaped segment conductor 40 is connected. It has become. Further, the second end portion 41b of the third leg portion 413 and the second end portion 41b of the second leg portion 412 inserted into the fifth slot 22 clockwise in the circumferential direction are connected by the curved portion 42. It is a pair of leg portions 41 of a U-shaped segment conductor 40. Further, the second end portion 41b of the first leg portion 411 and the second end portion 41b of the first leg portion 411 inserted into the sixth slot 22 clockwise in the circumferential direction are connected by the curved portion 42. It is a pair of leg portions 41 of a U-shaped segment conductor 40.

Further, when viewed from the second end surface 202 side of the stator core 20, on the open side coil end portion 31 side of the coil 30, of the four layers of leg portions 41 inserted into each slot 22 of the stator core 20, the first leg portion 411 The slanted portion 43 of the third leg portion 413 is slanted clockwise in the circumferential direction. The oblique portion 43 of the second leg portion 412 and the fourth leg portion 414 is oblique in the circumferential direction and in the counterclockwise direction.

The tip 44 of the fourth leg 414 is electrically connected to the tip 44 of the third leg 413 inserted into the sixth slot 22 counterclockwise in the circumferential direction. A joint portion 451 is formed. Further, the tip 44 of the first leg 411 is electrically connected to the tip 44 of the second leg 412 inserted into the sixth slot 22 clockwise in the circumferential direction, and is second-joined. A portion 452 is formed.

Therefore, when viewed from the second end surface 202 side of the stator core 20, in the U-shaped segment conductor 40, the fourth leg portions 414 separated by 6 slots in the circumferential direction are connected to each other by the curved portion 42, and 6 in the circumferential direction. The first leg portions 411 separated by slots are connected to each other by the curved portion 42, and the second leg portion 412 and the third leg portion 413 separated by 5 slots in the circumferential direction are connected by the curved portion 42. Further, when viewed from the second end surface 202 side of the stator core 20, the U-shaped segment conductor 40 is a U-shaped segment conductor 40 in which the oblique portion 43 and the tip portion 44 are separated by 6 slots in the circumferential direction. It is electrically connected to the tip 44 of the leg 41.

Next, the configuration of the V-phase coil 30V among the three-phase coils of the U-phase coil 30U, the V-phase coil 30V, and the W-phase coil 30W constituting the coil 30 will be described. As for the 48 slots 22 of the stator core 20, in order to simplify and clarify the explanation, as shown in FIG. 2, for convenience, as viewed from the second end surface 202 side of the stator core 20, as in the first embodiment. , No. 1 slot 2201 to No. 48 slot 2248 in the clockwise direction.

The V-phase coil 30V is configured by connecting two windings V1 and V2 in parallel. One end of the winding V1 is composed of the tip 44 of the fourth leg 414 inserted into the second slot 2202, and is electrically connected to the first V phase leader line 51V. One end of the winding V2 is composed of the tip 44 of the fourth leg 414 inserted into the first slot 2201 and is electrically connected to the second V phase leader 52V. The other ends of the windings V1 and V2 are both electrically connected to the neutral point 70.

The winding V1 is on the open side coil end 31 side, starting from the tip 44 of the fourth leg 414 inserted into the second slot 2202, and the fourth leg 414 inserted into the second slot 2202. Is connected to the fourth leg portion 414 inserted into the eighth slot 2208 by the curved portion 42 on the closed side coil end portion 32 side. The fourth leg portion 414 inserted into the eighth slot 2208 is connected to the third leg portion 413 inserted into the second slot 2202 by the first joint portion 451 on the open side coil end portion 31 side. The third leg portion 413 inserted into the second slot 2202 is connected to the second leg portion 412 inserted into the seventh slot 2207 by the curved portion 42 on the closed side coil end portion 32 side. The second leg portion 412 inserted into the seventh slot 2207 is connected to the first leg portion 411 inserted into the first slot 2201 by the second joint portion 452 on the open side coil end portion 31 side. The first leg portion 411 inserted into the first slot 2201 is connected to the first leg portion 411 inserted into the seventh slot 2207 by the curved portion 42 on the closed side coil end portion 32 side. The first leg portion 411 inserted into the seventh slot 2207 is connected to the second leg portion 412 inserted into the thirteenth slot 2213 by the second joint portion 452 on the open side coil end portion 31 side. The second leg portion 412 inserted into the thirteenth slot 2213 is connected to the third leg portion 413 inserted into the eighth slot 2208 by the curved portion 42 on the closed side coil end portion 32 side. The third leg portion 413 inserted into the eighth slot 2208 is connected to the fourth leg portion 414 inserted into the 14th slot 2214 by the first joint portion 451 on the open side coil end portion 31 side. The fourth leg portion 414 inserted into the 14th slot 2214 is connected to the fourth leg portion 414 inserted into the 20th slot 2220 by the curved portion 42 on the closed side coil end portion 32 side. The fourth leg portion 414 inserted into the 20th slot 2220 is connected to the third leg portion 413 inserted into the 14th slot 2214 by the first joint portion 451 on the open side coil end portion 31 side. The third leg portion 413 inserted into the 14th slot 2214 is connected to the second leg portion 412 inserted into the 19th slot 2219 by the curved portion 42 on the closed side coil end portion 32 side. The second leg portion 412 inserted into the 19th slot 2219 is connected to the first leg portion 411 inserted into the 13th slot 2213 by the second joint portion 452 on the open side coil end portion 31 side. The first leg portion 411 inserted into the 13th slot 2213 is connected to the first leg portion 411 inserted into the 19th slot 2219 by the curved portion 42 on the closed side coil end portion 32 side. The first leg portion 411 inserted into the 19th slot 2219 is connected to the second leg portion 412 inserted into the 25th slot 2225 by the second joint portion 452 on the open side coil end portion 31 side. The second leg portion 412 inserted into the 25th slot 2225 is connected to the third leg portion 413 inserted into the 20th slot 2220 by the curved portion 42 on the closed side coil end portion 32 side. The third leg portion 413 inserted into the 20th slot 2220 is connected to the fourth leg portion 414 inserted into the 26th slot 2226 by the first joint portion 451 on the open side coil end portion 31 side. The fourth leg portion 414 inserted into the 26th slot 2226 is connected to the fourth leg portion 414 inserted into the 32nd slot 2232 by the curved portion 42 on the closed side coil end portion 32 side. The fourth leg portion 414 inserted into the 32nd slot 2232 is connected to the third leg portion 413 inserted into the 26th slot 2226 by the first joint portion 451 on the open side coil end portion 31 side. The third leg portion 413 inserted into the 26th slot 2226 is connected to the second leg portion 412 inserted into the 31st slot 2231 by the curved portion 42 on the closed side coil end portion 32 side. The second leg portion 412 inserted into the 31st slot 2231 is connected to the first leg portion 411 inserted into the 25th slot 2225 by the second joint portion 452 on the open side coil end portion 31 side. The first leg portion 411 inserted into the 25th slot 2225 is connected to the first leg portion 411 inserted into the 31st slot 2231 by the curved portion 42 on the closed side coil end portion 32 side. The first leg portion 411 inserted into the 31st slot 2231 is connected to the second leg portion 412 inserted into the 37th slot 2237 by the second joint portion 452 on the open side coil end portion 31 side. The second leg portion 412 inserted into the 37th slot 2237 is connected to the third leg portion 413 inserted into the 32nd slot 2232 by the curved portion 42 on the closed side coil end portion 32 side. The third leg portion 413 inserted into the 32nd slot 2232 is connected to the fourth leg portion 414 inserted into the 38th slot 2238 by the first joint portion 451 on the open side coil end portion 31 side. The fourth leg portion 414 inserted into the 38th slot 2238 is connected to the fourth leg portion 414 inserted into the 44th slot 2244 by the curved portion 42 on the closed side coil end portion 32 side. The fourth leg portion 414 inserted into the 44th slot 2244 is connected to the third leg portion 413 inserted into the 38th slot 2238 by the first joint portion 451 on the open side coil end portion 31 side. The third leg portion 413 inserted into the 38th slot 2238 is connected to the second leg portion 412 inserted into the 43rd slot 2243 by the curved portion 42 on the closed side coil end portion 32 side. The second leg portion 412 inserted into the 43rd slot 2243 is connected to the first leg portion 411 inserted into the 37th slot 2237 by the second joint portion 452 on the open side coil end portion 31 side. The first leg portion 411 inserted into the 37th slot 2237 is connected to the first leg portion 411 inserted into the 43rd slot 2243 by the curved portion 42 on the closed side coil end portion 32 side. The first leg portion 411 inserted into the 43rd slot 2243 is connected to the second leg portion 412 inserted into the first slot 2201 by the second joint portion 452 on the open side coil end portion 31 side. The second leg portion 412 inserted into the first slot 2201 is connected to the third leg portion 413 inserted into the 44th slot 2244 by the curved portion 42 on the closed side coil end portion 32 side. The third leg portion 413 inserted into the 44th slot 2244 is on the open side coil end portion 31 side, and the tip portion 44 serves as the end point of the winding V1 and connects to the neutral point 70.

By winding the winding V1 around the stator core 20 in this way, the winding V1 forms eight poles on the stator 10.

The winding V2 is on the open side coil end 31 side, starting from the tip 44 of the fourth leg 414 inserted into the first slot 2201, and the fourth leg 414 inserted into the first slot 2201. Is connected to the fourth leg portion 414 inserted into the seventh slot 2207 by the curved portion 42 on the closed side coil end portion 32 side. The fourth leg portion 414 inserted into the seventh slot 2207 is connected to the third leg portion 413 inserted into the first slot 2201 by the first joint portion 451 on the open side coil end portion 31 side. The third leg portion 413 inserted into the first slot 2201 is connected to the second leg portion 412 inserted into the sixth slot 2206 by the curved portion 42 on the closed side coil end portion 32 side. The second leg portion 412 inserted into the sixth slot 2206 is connected to the first leg portion 411 inserted into the 48th slot 2248 by the second joint portion 452 on the open side coil end portion 31 side. The first leg portion 411 inserted into the 48th slot 2248 is connected to the first leg portion 411 inserted into the sixth slot 2206 by the curved portion 42 on the closed side coil end portion 32 side. The first leg portion 411 inserted into the sixth slot 2206 is connected to the second leg portion 412 inserted into the twelfth slot 2212 by the second joint portion 452 on the open side coil end portion 31 side. The second leg portion 412 inserted into the twelfth slot 2212 is connected to the third leg portion 413 inserted into the seventh slot 2207 by the curved portion 42 on the closed side coil end portion 32 side. The third leg portion 413 inserted into the seventh slot 2207 is connected to the fourth leg portion 414 inserted into the thirteenth slot 2213 by the first joint portion 451 on the open side coil end portion 31 side. The fourth leg portion 414 inserted into the thirteenth slot 2213 is connected to the fourth leg portion 414 inserted into the 19th slot 2219 by the curved portion 42 on the closed side coil end portion 32 side. The fourth leg portion 414 inserted into the 19th slot 2219 is connected to the third leg portion 413 inserted into the 13th slot 2213 by the first joint portion 451 on the open side coil end portion 31 side. The third leg portion 413 inserted into the thirteenth slot 2213 is connected to the second leg portion 412 inserted into the eighteenth slot 2218 by the curved portion 42 on the closed side coil end portion 32 side. The second leg portion 412 inserted into the 18th slot 2218 is connected to the first leg portion 411 inserted into the 12th slot 2212 by the second joint portion 452 on the open side coil end portion 31 side. The first leg portion 411 inserted into the twelfth slot 2212 is connected to the first leg portion 411 inserted into the eighteenth slot 2218 by the curved portion 42 on the closed side coil end portion 32 side. The first leg portion 411 inserted into the 18th slot 2218 is connected to the second leg portion 412 inserted into the 24th slot 2224 by the second joint portion 452 on the open side coil end portion 31 side. The second leg portion 412 inserted into the 24th slot 2224 is connected to the third leg portion 413 inserted into the 19th slot 2219 by the curved portion 42 on the closed side coil end portion 32 side. The third leg portion 413 inserted into the 19th slot 2219 is connected to the fourth leg portion 414 inserted into the 25th slot 2225 by the first joint portion 451 on the open side coil end portion 31 side. The fourth leg portion 414 inserted into the 25th slot 2225 is connected to the fourth leg portion 414 inserted into the 31st slot 2231 by the curved portion 42 on the closed side coil end portion 32 side. The fourth leg portion 414 inserted into the 31st slot 2231 is connected to the third leg portion 413 inserted into the 25th slot 2225 by the first joint portion 451 on the open side coil end portion 31 side. The third leg portion 413 inserted into the 25th slot 2225 is connected to the second leg portion 412 inserted into the 30th slot 2230 by the curved portion 42 on the closed side coil end portion 32 side. The second leg portion 412 inserted into the 30th slot 2230 is connected to the first leg portion 411 inserted into the 24th slot 2224 by the second joint portion 452 on the open side coil end portion 31 side. The first leg portion 411 inserted into the 24th slot 2224 is connected to the first leg portion 411 inserted into the 30th slot 2230 by the curved portion 42 on the closed side coil end portion 32 side. The first leg portion 411 inserted into the 30th slot 2230 is connected to the second leg portion 412 inserted into the 36th slot 2236 by the second joint portion 452 on the open side coil end portion 31 side. The second leg portion 412 inserted into the 36th slot 2236 is connected to the third leg portion 413 inserted into the 31st slot 2231 by the curved portion 42 on the closed side coil end portion 32 side. The third leg portion 413 inserted into the 31st slot 2231 is connected to the fourth leg portion 414 inserted into the 37th slot 2237 by the first joint portion 451 on the open side coil end portion 31 side. The fourth leg portion 414 inserted into the 37th slot 2237 is connected to the fourth leg portion 414 inserted into the 43rd slot 2243 by the curved portion 42 on the closed side coil end portion 32 side. The fourth leg portion 414 inserted into the 43rd slot 2243 is connected to the third leg portion 413 inserted into the 37th slot 2237 by the first joint portion 451 on the open side coil end portion 31 side. The third leg portion 413 inserted into the 37th slot 2237 is connected to the second leg portion 412 inserted into the 42nd slot 2242 by the curved portion 42 on the closed side coil end portion 32 side. The second leg portion 412 inserted into the 42nd slot 2242 is connected to the first leg portion 411 inserted into the 36th slot 2236 by the second joint portion 452 on the open side coil end portion 31 side. The first leg portion 411 inserted into the 36th slot 2236 is connected to the first leg portion 411 inserted into the 42nd slot 2242 by the curved portion 42 on the closed side coil end portion 32 side. The first leg portion 411 inserted into the 42nd slot 2242 is connected to the second leg portion 412 inserted into the 48th slot 2248 by the second joint portion 452 on the open side coil end portion 31 side. The second leg portion 412 inserted into the 48th slot 2248 is connected to the third leg portion 413 inserted into the 43rd slot 2243 by the curved portion 42 on the closed side coil end portion 32 side. The third leg portion 413 inserted into the 43rd slot 2243 is on the open side coil end portion 31 side, and the tip portion 44 serves as the end point of the winding V2 and connects to the neutral point 70.

By winding the winding V2 around the stator core 20 in this way, the winding V2 forms eight poles on the stator 10. The winding V2 is formed so as to be wound in the same manner as the winding V1 at a position shifted by one slot counterclockwise from the winding V1 when viewed from the second end surface 202 side of the stator core 20. NS.

Like the V-phase coil 30V, the U-phase coil 30U is configured by connecting two windings U1 and U2 in parallel. One end of the winding U1 is electrically connected to the first U phase leader wire 51U, and one end of the winding U2 is electrically connected to the second U phase leader 52U. The other ends of the windings U1 and U2 are both electrically connected to the neutral point 70.

One end of the winding U1 is formed by the tip 44 of the fourth leg 414 inserted into the 46th slot 2246 on the open side coil end 31 side, and is electrically connected to the 1st U phase leader line 51U. doing.

The winding U1 is wound on the open side coil end 31 side, starting from the tip 44 of the fourth leg 414 inserted into the 46th slot 2246, as viewed from the second end surface 202 side of the stator core 20. It is formed so as to be wound in the same manner as the winding V1 at a position deviated by 4 slots counterclockwise from V1 in the circumferential direction. Then, the winding U1 forms eight poles on the stator 10, and the tip portion 44 of the third leg portion 413 inserted into the 40th slot 2240 on the open side coil end portion 31 side is the winding U1. It becomes the end point and connects to the neutral point 70.

One end of the winding U2 is formed on the open side coil end 31 side by the tip 44 of the fourth leg 414 inserted into the 45th slot 2245, and is electrically connected to the second U phase leader 52U. doing.

The winding U2 is wound on the open side coil end 31 side, starting from the tip 44 of the fourth leg 414 inserted into the 45th slot 2245, and viewed from the second end surface 202 side of the stator core 20. It is formed so as to be wound in the same manner as the winding V2 at a position deviated by 4 slots counterclockwise from V2 in the circumferential direction. Then, the winding U2 forms eight poles on the stator 10, and the tip portion 44 of the third leg portion 413 inserted into the 39th slot 2239 on the open side coil end portion 31 side is formed on the winding U2. It becomes the end point and connects to the neutral point 70.

The W-phase coil 30W is configured by connecting two windings W1 and W2 in parallel, similarly to the U-phase coil 30U and the V-phase coil 30V. One end of the winding W1 is electrically connected to the first W phase leader line 51W, and one end of the winding W2 is electrically connected to the second W phase leader 52W. The other ends of the windings W1 and W2 are both electrically connected to the neutral point 70.

One end of the winding W1 is formed on the open side coil end 31 side by the tip 44 of the fourth leg 414 inserted into the sixth slot 2206, and is electrically connected to the first W phase leader 51W. doing.

The winding W1 is wound on the open side coil end 31 side, starting from the tip 44 of the fourth leg 414 inserted into the sixth slot 2206, and viewed from the second end surface 202 side of the stator core 20. It is formed so as to be wound in the same manner as the winding V1 at a position displaced by 4 slots clockwise from V1 in the circumferential direction. Then, the winding W1 forms eight poles on the stator 10, and the tip portion 44 of the third leg portion 413 inserted into the 48th slot 2248 on the open side coil end portion 31 side is the winding W1. It becomes the end point and connects to the neutral point 70.

One end of the winding W2 is formed on the open side coil end 31 side by the tip 44 of the fourth leg 414 inserted into the fifth slot 2205, and is electrically connected to the second W phase leader 52W. doing.

The winding W2 is wound on the open side coil end 31 side, starting from the tip 44 of the fourth leg 414 inserted into the fifth slot 2205, and viewed from the second end surface 202 side of the stator core 20. It is formed so as to be wound in the same manner as the winding V2 at a position displaced by 4 slots clockwise from V2 in the circumferential direction. Then, the winding W2 forms eight poles on the stator 10, and the tip portion 44 of the third leg portion 413 inserted into the 47th slot 2247 on the open side coil end portion 31 side is formed on the winding W2. It becomes the end point and connects to the neutral point 70.

Therefore, each slot 22 of the stator core 20 is a first slot in which the V-phase segment conductor 40 is inserted, a second slot in which the V-phase segment conductor 40 and the U-phase segment conductor 40 are inserted, and a U-phase segment. The third slot in which the conductor 40 is inserted, the fourth slot in which the U-phase segment conductor 40 and the W-phase segment conductor 40 are inserted, the fifth slot in which the W-phase segment conductor 40 is inserted, and the W-phase segment. The sixth slot into which the conductor 40 and the V-phase segment conductor 40 are inserted is periodically arranged in this order in the circumferential direction. In the present embodiment, the 1st slot 2201, the 7th slot 2207, the 13th slot 2213, the 19th slot 2219, the 25th slot 2225, the 31st slot 2231, the 37th slot 2237, and the 43rd slot. Slot 2243 is the 1st slot, the 2nd slot 2202, the 8th slot 2208, the 14th slot 2214, the 20th slot 2220, the 26th slot 2226, the 32nd slot 2232, the 38th slot 2238, and the 38th slot. The 44th slot 2244 is the 2nd slot, the 3rd slot 2203, the 9th slot 2209, the 15th slot 2215, the 21st slot 2221, the 27th slot 2227, the 33rd slot 2233, and the 39th slot 2239. , 45th slot 2245 is the 3rd slot, 4th slot 2204, 10th slot 2210, 16th slot 2216, 22nd slot 2222, 28th slot 2228, 34th slot 2234, 40th Slot 2240, 46th slot 2246 is 4th slot, 5th slot 2205, 11th slot 2211, 17th slot 2217, 23rd slot 2223, 29th slot 2229, 35th slot 2235, 35th slot The 41st slot 2241 and the 47th slot 2247 are the 5th slot, the 6th slot 2206, the 12th slot 2212, the 18th slot 2218, the 24th slot 2224, the 30th slot 2230, and the 36th slot 2236. , The 42nd slot 2242 and the 48th slot 2248 are configured as the 6th slot.

As a result, since the segment conductor 40 of each phase is inserted into the three adjacent slots 22, the loss and torque ripple that occur when the rotary electric machine is driven can be reduced.

Further, by winding the windings U1, U2, V1, V2, W1, and W2 in each slot 22 in this way, the coil 30 electrically connects two tip portions 44 of the segment conductors 40 having the same phase but different from each other. The leg 41 (fourth in the present embodiment) in which the U-phase leader line 50U, the V-phase leader line 50V, and the W-phase leader line 50W are arranged in the outermost layer in the radial direction of the slot 22 without using a connecting bridge. It can be configured to connect to the tip 44 of the fourth leg 414) arranged in the layer. Further, the neutral point 70 is the tip portion 44 of the leg portion 41 (in the present embodiment, the third leg portion 413 arranged in the third layer) arranged in the second layer from the outermost layer in the radial direction of the slot 22. Can be configured to connect.

Therefore, the U-phase leader line 50U, the V-phase leader line 50V, the W-phase leader line 50W, and the neutral point 70 can be arranged on the outer side in the radial direction of the open side coil end portion 31. As a result, the U-phase leader line 50U, the V-phase leader line 50V, the W-phase leader line 50W, and the neutral point 70 can be made into a simple shape, so that the U-phase leader line 50U, the V-phase leader line 50V, W The manufacturing cost of the phase leader line 50W and the neutral point 70 can be reduced. Further, since the total lengths of the U-phase leader line 50U, the V-phase leader line 50V, the W-phase leader line 50W, and the neutral point 70 can be shortened, the vibration resistance is improved. Further, the manufacturing process when arranging the U-phase leader wire 50U, the V-phase leader wire 50V, the W-phase leader wire 50W, and the neutral point 70 on the stator 10 becomes easy.

Further, in the U-shaped segment conductor 40, since the second leg portion 412 and the third leg portion 413 separated by 5 slots in the circumferential direction are connected by the curved portion 42, the two legs are spaced by the conventional 6 slots. The height of the oblique portion 43 in the axial direction is lower than that in the case where the portions are connected, and the length of the oblique portion 43 is shorter. As a result, the resistance of the windings U1, U2, V1, V2, W1 and W2 is reduced, so that the output efficiency of the rotary electric machine is improved.

[Fourth Embodiment]
Subsequently, the stator 10 of the fourth embodiment of the present invention will be described with reference to FIG. In the following description, the same components as those of the stator 10 of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted or simplified. The stator 10 of the fourth embodiment is different from the stator 10 of the first embodiment in the way of winding the windings U1, U2, V1, V2, W1 and W2 that wind each slot 22 of the stator core 20. Hereinafter, how to wind each winding in the stator 10 of the fourth embodiment will be described in detail.

The configuration of the coil 30 by the segment conductors 40 inserted into each slot 22 of the stator core 20 will be described with reference to FIG. For the sake of simplicity and clarity, the 48 slots 22 of the stator core 20 are, for convenience, the first slot clockwise as shown in FIG. 2 when viewed from the second end surface 202 side of the stator core 20. It is set to 2201 to the 48th slot 2248. In FIG. 8, the numbers shown at the upper part of the horizontal axis indicate the slot numbers, and 1 to 48 correspond to the 1st slot 2201 to the 48th slot 2248, respectively. The numbers circled at the left end of the vertical axis indicate the layer numbers of the legs 41 inserted into each slot 22, and 1 to 4 are the first leg 411 to the fourth leg, respectively. Corresponds to 414.

As shown in FIG. 8B, when viewed from the second end surface 202 side of the stator core 20, on the closed side coil end portion 32 side of the coil 30, the second end portion 41b of the fourth leg portion 414 and the circumferential direction The second end 41b of the fourth leg 414 inserted clockwise into the sixth slot 22 is connected by the curved portion 42, and the pair of legs 41 of the U-shaped segment conductor 40 is connected. It has become. Further, the second end portion 41b of the third leg portion 413 and the second end portion 41b of the second leg portion 412 inserted into the fifth slot 22 clockwise in the circumferential direction are connected by the curved portion 42. It is a pair of leg portions 41 of a U-shaped segment conductor 40. Further, the second end portion 41b of the first leg portion 411 and the second end portion 41b of the first leg portion 411 inserted into the sixth slot 22 counterclockwise in the circumferential direction are formed by the curved portion 42. They are connected to form a pair of legs 41 of U-shaped segment conductors 40.

Further, when viewed from the second end surface 202 side of the stator core 20, on the open side coil end portion 31 side of the coil 30, of the four layers of leg portions 41 inserted into each slot 22 of the stator core 20, the first leg portion 411 The slanted portion 43 of the third leg portion 413 is slanted clockwise in the circumferential direction. The oblique portion 43 of the second leg portion 412 and the fourth leg portion 414 is oblique in the circumferential direction and in the counterclockwise direction.

The tip 44 of the first leg 411 is electrically connected to the tip 44 of the second leg 412 inserted into the sixth slot 22 counterclockwise in the circumferential direction, and is second. A joint 452 is formed. Further, the tip portion 44 of the fourth leg portion 414 is electrically connected to the tip portion 44 of the third leg portion 413 inserted into the sixth slot 22 clockwise in the circumferential direction, and is first joined. The portion 451 is formed.

Therefore, when viewed from the second end surface 202 side of the stator core 20, in the U-shaped segment conductor 40, the fourth leg portions 414 separated by 6 slots in the circumferential direction are connected to each other by the curved portion 42, and 6 in the circumferential direction. The first leg portions 411 separated by slots are connected to each other by the curved portion 42, and the second leg portion 412 and the third leg portion 413 separated by 5 slots in the circumferential direction are connected by the curved portion 42. Further, when viewed from the second end surface 202 side of the stator core 20, the U-shaped segment conductor 40 is a U-shaped segment conductor 40 in which the oblique portion 43 and the tip portion 44 are separated by 6 slots in the circumferential direction. It is electrically connected to the tip 44 of the leg 41.

Next, the configuration of the V-phase coil 30V among the three-phase coils of the U-phase coil 30U, the V-phase coil 30V, and the W-phase coil 30W constituting the coil 30 will be described. As for the 48 slots 22 of the stator core 20, in order to simplify and clarify the explanation, as shown in FIG. 2, for convenience, as viewed from the second end surface 202 side of the stator core 20, as in the first embodiment. , No. 1 slot 2201 to No. 48 slot 2248 in the clockwise direction.

The V-phase coil 30V is configured by connecting two windings V1 and V2 in parallel. One end of the winding V1 is composed of the tip 44 of the fourth leg 414 inserted into the second slot 2202, and is electrically connected to the first V phase leader line 51V. One end of the winding V2 is composed of the tip 44 of the fourth leg 414 inserted into the first slot 2201 and is electrically connected to the second V phase leader 52V. The other ends of the windings V1 and V2 are both electrically connected to the neutral point 70.

The winding V1 is on the open side coil end 31 side, starting from the tip 44 of the fourth leg 414 inserted into the second slot 2202, and the fourth leg 414 inserted into the second slot 2202. Is connected to the fourth leg portion 414 inserted into the eighth slot 2208 by the curved portion 42 on the closed side coil end portion 32 side. The fourth leg portion 414 inserted into the eighth slot 2208 is connected to the third leg portion 413 inserted into the 14th slot 2214 by the first joint portion 451 on the open side coil end portion 31 side. The third leg portion 413 inserted into the 14th slot 2214 is connected to the second leg portion 412 inserted into the 19th slot 2219 by the curved portion 42 on the closed side coil end portion 32 side. The second leg portion 412 inserted into the 19th slot 2219 is connected to the first leg portion 411 inserted into the 25th slot 2225 by the second joint portion 452 on the open side coil end portion 31 side. The first leg portion 411 inserted into the 25th slot 2225 is connected to the first leg portion 411 inserted into the 31st slot 2231 by the curved portion 42 on the closed side coil end portion 32 side. The first leg portion 411 inserted into the 31st slot 2231 is connected to the second leg portion 412 inserted into the 25th slot 2225 by the second joint portion 452 on the open side coil end portion 31 side. The second leg portion 412 inserted into the 25th slot 2225 is connected to the third leg portion 413 inserted into the 20th slot 2220 by the curved portion 42 on the closed side coil end portion 32 side. The third leg portion 413 inserted into the 20th slot 2220 is connected to the fourth leg portion 414 inserted into the 14th slot 2214 by the first joint portion 451 on the open side coil end portion 31 side. The fourth leg portion 414 inserted into the 14th slot 2214 is connected to the fourth leg portion 414 inserted into the 20th slot 2220 by the curved portion 42 on the closed side coil end portion 32 side. The fourth leg portion 414 inserted into the 20th slot 2220 is connected to the third leg portion 413 inserted into the 26th slot 2226 by the first joint portion 451 on the open side coil end portion 31 side. The third leg portion 413 inserted into the 26th slot 2226 is connected to the second leg portion 412 inserted into the 31st slot 2231 by the curved portion 42 on the closed side coil end portion 32 side. The second leg portion 412 inserted into the 31st slot 2231 is connected to the first leg portion 411 inserted into the 37th slot 2237 by the second joint portion 452 on the open side coil end portion 31 side. The first leg portion 411 inserted into the 37th slot 2237 is connected to the first leg portion 411 inserted into the 43rd slot 2243 by the curved portion 42 on the closed side coil end portion 32 side. The first leg portion 411 inserted into the 43rd slot 2243 is connected to the second leg portion 412 inserted into the 37th slot 2237 by the second joint portion 452 on the open side coil end portion 31 side. The second leg portion 412 inserted into the 37th slot 2237 is connected to the third leg portion 413 inserted into the 32nd slot 2232 by the curved portion 42 on the closed side coil end portion 32 side. The third leg portion 413 inserted into the 32nd slot 2232 is connected to the fourth leg portion 414 inserted into the 26th slot 2226 by the first joint portion 451 on the open side coil end portion 31 side. The fourth leg portion 414 inserted into the 26th slot 2226 is connected to the fourth leg portion 414 inserted into the 32nd slot 2232 by the curved portion 42 on the closed side coil end portion 32 side. The fourth leg portion 414 inserted into the 32nd slot 2232 is connected to the third leg portion 413 inserted into the 38th slot 2238 by the first joint portion 451 on the open side coil end portion 31 side. The third leg portion 413 inserted into the 38th slot 2238 is connected to the second leg portion 412 inserted into the 43rd slot 2243 by the curved portion 42 on the closed side coil end portion 32 side. The second leg portion 412 inserted into the 43rd slot 2243 is connected to the first leg portion 411 inserted into the first slot 2201 by the second joint portion 452 on the open side coil end portion 31 side. The first leg portion 411 inserted into the first slot 2201 is connected to the first leg portion 411 inserted into the seventh slot 2207 by the curved portion 42 on the closed side coil end portion 32 side. The first leg portion 411 inserted into the seventh slot 2207 is connected to the second leg portion 412 inserted into the first slot 2201 by the second joint portion 452 on the open side coil end portion 31 side. The second leg portion 412 inserted into the first slot 2201 is connected to the third leg portion 413 inserted into the 44th slot 2244 by the curved portion 42 on the closed side coil end portion 32 side. The third leg portion 413 inserted into the 44th slot 2244 is connected to the fourth leg portion 414 inserted into the 38th slot 2238 by the first joint portion 451 on the open side coil end portion 31 side. The fourth leg portion 414 inserted into the 38th slot 2238 is connected to the fourth leg portion 414 inserted into the 44th slot 2244 by the curved portion 42 on the closed side coil end portion 32 side. The fourth leg portion 414 inserted into the 44th slot 2244 is connected to the third leg portion 413 inserted into the second slot 2202 by the first joint portion 451 on the open side coil end portion 31 side. The third leg portion 413 inserted into the second slot 2202 is connected to the second leg portion 412 inserted into the seventh slot 2207 by the curved portion 42 on the closed side coil end portion 32 side. The second leg portion 412 inserted into the seventh slot 2207 is connected to the first leg portion 411 inserted into the thirteenth slot 2213 by the second joint portion 452 on the open side coil end portion 31 side. The first leg portion 411 inserted into the 13th slot 2213 is connected to the first leg portion 411 inserted into the 19th slot 2219 by the curved portion 42 on the closed side coil end portion 32 side. The first leg portion 411 inserted into the 19th slot 2219 is connected to the second leg portion 412 inserted into the 13th slot 2213 by the second joint portion 452 on the open side coil end portion 31 side. The second leg portion 412 inserted into the thirteenth slot 2213 is connected to the third leg portion 413 inserted into the eighth slot 2208 by the curved portion 42 on the closed side coil end portion 32 side. The third leg portion 413 inserted into the eighth slot 2208 is on the open side coil end portion 31 side, and the tip portion 44 serves as the end point of the winding V1 and connects to the neutral point 70.

By winding the winding V1 around the stator core 20 in this way, the winding V1 forms eight poles on the stator 10.

The winding V2 is on the open side coil end 31 side, starting from the tip 44 of the fourth leg 414 inserted into the first slot 2201, and the fourth leg 414 inserted into the first slot 2201. Is connected to the fourth leg portion 414 inserted into the seventh slot 2207 by the curved portion 42 on the closed side coil end portion 32 side. The fourth leg portion 414 inserted into the seventh slot 2207 is connected to the third leg portion 413 inserted into the thirteenth slot 2213 by the first joint portion 451 on the open side coil end portion 31 side. The third leg portion 413 inserted into the thirteenth slot 2213 is connected to the second leg portion 412 inserted into the eighteenth slot 2218 by the curved portion 42 on the closed side coil end portion 32 side. The second leg portion 412 inserted into the 18th slot 2218 is connected to the first leg portion 411 inserted into the 24th slot 2224 by the second joint portion 452 on the open side coil end portion 31 side. The first leg portion 411 inserted into the 24th slot 2224 is connected to the first leg portion 411 inserted into the 30th slot 2230 by the curved portion 42 on the closed side coil end portion 32 side. The first leg portion 411 inserted into the 30th slot 2230 is connected to the second leg portion 412 inserted into the 24th slot 2224 by the second joint portion 452 on the open side coil end portion 31 side. The second leg portion 412 inserted into the 24th slot 2224 is connected to the third leg portion 413 inserted into the 19th slot 2219 by the curved portion 42 on the closed side coil end portion 32 side. The third leg portion 413 inserted into the 19th slot 2219 is connected to the fourth leg portion 414 inserted into the 13th slot 2213 by the first joint portion 451 on the open side coil end portion 31 side. The fourth leg portion 414 inserted into the thirteenth slot 2213 is connected to the fourth leg portion 414 inserted into the 19th slot 2219 by the curved portion 42 on the closed side coil end portion 32 side. The fourth leg portion 414 inserted into the 19th slot 2219 is connected to the third leg portion 413 inserted into the 25th slot 2225 by the first joint portion 451 on the open side coil end portion 31 side. The third leg portion 413 inserted into the 25th slot 2225 is connected to the second leg portion 412 inserted into the 30th slot 2230 by the curved portion 42 on the closed side coil end portion 32 side. The second leg portion 412 inserted into the 30th slot 2230 is connected to the first leg portion 411 inserted into the 36th slot 2236 by the second joint portion 452 on the open side coil end portion 31 side. The first leg portion 411 inserted into the 36th slot 2236 is connected to the first leg portion 411 inserted into the 42nd slot 2242 by the curved portion 42 on the closed side coil end portion 32 side. The first leg portion 411 inserted into the 42nd slot 2242 is connected to the second leg portion 412 inserted into the 36th slot 2236 by the second joint portion 452 on the open side coil end portion 31 side. The second leg portion 412 inserted into the 36th slot 2236 is connected to the third leg portion 413 inserted into the 31st slot 2231 by the curved portion 42 on the closed side coil end portion 32 side. The third leg portion 413 inserted into the 31st slot 2231 is connected to the fourth leg portion 414 inserted into the 25th slot 2225 by the first joint portion 451 on the open side coil end portion 31 side. The fourth leg portion 414 inserted into the 25th slot 2225 is connected to the fourth leg portion 414 inserted into the 31st slot 2231 by the curved portion 42 on the closed side coil end portion 32 side. The fourth leg portion 414 inserted into the 31st slot 2231 is connected to the third leg portion 413 inserted into the 37th slot 2237 by the first joint portion 451 on the open side coil end portion 31 side. The third leg portion 413 inserted into the 37th slot 2237 is connected to the second leg portion 412 inserted into the 42nd slot 2242 by the curved portion 42 on the closed side coil end portion 32 side. The second leg portion 412 inserted into the 42nd slot 2242 is connected to the first leg portion 411 inserted into the 48th slot 2248 by the second joint portion 452 on the open side coil end portion 31 side. The first leg portion 411 inserted into the 48th slot 2248 is connected to the first leg portion 411 inserted into the sixth slot 2206 by the curved portion 42 on the closed side coil end portion 32 side. The first leg portion 411 inserted into the sixth slot 2206 is connected to the second leg portion 412 inserted into the 48th slot 2248 by the second joint portion 452 on the open side coil end portion 31 side. The second leg portion 412 inserted into the 48th slot 2248 is connected to the third leg portion 413 inserted into the 43rd slot 2243 by the curved portion 42 on the closed side coil end portion 32 side. The third leg portion 413 inserted into the 43rd slot 2243 is connected to the fourth leg portion 414 inserted into the 37th slot 2237 by the first joint portion 451 on the open side coil end portion 31 side. The fourth leg portion 414 inserted into the 37th slot 2237 is connected to the fourth leg portion 414 inserted into the 43rd slot 2243 by the curved portion 42 on the closed side coil end portion 32 side. The fourth leg portion 414 inserted into the 43rd slot 2243 is connected to the third leg portion 413 inserted into the first slot 2201 by the first joint portion 451 on the open side coil end portion 31 side. The third leg portion 413 inserted into the first slot 2201 is connected to the second leg portion 412 inserted into the sixth slot 2206 by the curved portion 42 on the closed side coil end portion 32 side. The second leg portion 412 inserted into the sixth slot 2206 is connected to the first leg portion 411 inserted into the twelfth slot 2212 by the second joint portion 452 on the open side coil end portion 31 side. The first leg portion 411 inserted into the twelfth slot 2212 is connected to the first leg portion 411 inserted into the eighteenth slot 2218 by the curved portion 42 on the closed side coil end portion 32 side. The first leg portion 411 inserted into the 18th slot 2218 is connected to the second leg portion 412 inserted into the 12th slot 2212 by the second joint portion 452 on the open side coil end portion 31 side. The second leg portion 412 inserted into the twelfth slot 2212 is connected to the third leg portion 413 inserted into the seventh slot 2207 by the curved portion 42 on the closed side coil end portion 32 side. The third leg portion 413 inserted into the seventh slot 2207 is on the open side coil end portion 31 side, and the tip portion 44 serves as the end point of the winding V2 and connects to the neutral point 70.

By winding the winding V2 around the stator core 20 in this way, the winding V2 forms eight poles on the stator 10. The winding V2 is formed so as to be wound in the same manner as the winding V1 at a position shifted by one slot counterclockwise from the winding V1 when viewed from the second end surface 202 side of the stator core 20. NS.

Like the V-phase coil 30V, the U-phase coil 30U is configured by connecting two windings U1 and U2 in parallel. One end of the winding U1 is electrically connected to the first U phase leader wire 51U, and one end of the winding U2 is electrically connected to the second U phase leader 52U. The other ends of the windings U1 and U2 are both electrically connected to the neutral point 70.

One end of the winding U1 is formed by the tip 44 of the fourth leg 414 inserted into the 46th slot 2246 on the open side coil end 31 side, and is electrically connected to the 1st U phase leader line 51U. doing.

The winding U1 is wound on the open side coil end 31 side, starting from the tip 44 of the fourth leg 414 inserted into the 46th slot 2246, as viewed from the second end surface 202 side of the stator core 20. It is formed so as to be wound in the same manner as the winding V1 at a position deviated by 4 slots counterclockwise from V1 in the circumferential direction. Then, the winding U1 forms eight poles on the stator 10, and the tip portion 44 of the third leg portion 413 inserted into the fourth slot 2204 on the open side coil end portion 31 side is the winding U1. It becomes the end point and connects to the neutral point 70.

One end of the winding U2 is formed on the open side coil end 31 side by the tip 44 of the fourth leg 414 inserted into the 45th slot 2245, and is electrically connected to the second U phase leader 52U. doing.

The winding U2 is wound on the open side coil end 31 side, starting from the tip 44 of the fourth leg 414 inserted into the 45th slot 2245, and viewed from the second end surface 202 side of the stator core 20. It is formed so as to be wound in the same manner as the winding V2 at a position deviated by 4 slots counterclockwise from V2 in the circumferential direction. Then, the winding U2 forms eight poles on the stator 10, and the tip portion 44 of the third leg portion 413 inserted into the third slot 2203 on the open side coil end portion 31 side is formed on the winding U2. It becomes the end point and connects to the neutral point 70.

The W-phase coil 30W is configured by connecting two windings W1 and W2 in parallel, similarly to the U-phase coil 30U and the V-phase coil 30V. One end of the winding W1 is electrically connected to the first W phase leader line 51W, and one end of the winding W2 is electrically connected to the second W phase leader 52W. The other ends of the windings W1 and W2 are both electrically connected to the neutral point 70.

One end of the winding W1 is formed on the open side coil end 31 side by the tip 44 of the fourth leg 414 inserted into the sixth slot 2206, and is electrically connected to the first W phase leader 51W. doing.

The winding W1 is wound on the open side coil end 31 side, starting from the tip 44 of the fourth leg 414 inserted into the sixth slot 2206, and viewed from the second end surface 202 side of the stator core 20. It is formed so as to be wound in the same manner as the winding V1 at a position displaced by 4 slots clockwise from V1 in the circumferential direction. Then, the winding W1 forms eight poles on the stator 10, and the tip portion 44 of the third leg portion 413 inserted into the twelfth slot 2212 on the open side coil end portion 31 side is the winding W1. It becomes the end point and connects to the neutral point 70.

One end of the winding W2 is formed on the open side coil end 31 side by the tip 44 of the fourth leg 414 inserted into the fifth slot 2205, and is electrically connected to the second W phase leader 52W. doing.

The winding W2 is wound on the open side coil end 31 side, starting from the tip 44 of the fourth leg 414 inserted into the fifth slot 2205, and viewed from the second end surface 202 side of the stator core 20. It is formed so as to be wound in the same manner as the winding V2 at a position displaced by 4 slots clockwise from V2 in the circumferential direction. Then, the winding W2 forms eight poles on the stator 10, and the tip portion 44 of the third leg portion 413 inserted into the eleventh slot 2211 on the open side coil end portion 31 side is formed on the winding W2. It becomes the end point and connects to the neutral point 70.

Therefore, each slot 22 of the stator core 20 is a first slot in which the V-phase segment conductor 40 is inserted, a second slot in which the V-phase segment conductor 40 and the U-phase segment conductor 40 are inserted, and a U-phase segment. The third slot in which the conductor 40 is inserted, the fourth slot in which the U-phase segment conductor 40 and the W-phase segment conductor 40 are inserted, the fifth slot in which the W-phase segment conductor 40 is inserted, and the W-phase segment. The sixth slot into which the conductor 40 and the V-phase segment conductor 40 are inserted is periodically arranged in this order in the circumferential direction. In the present embodiment, the 1st slot 2201, the 7th slot 2207, the 13th slot 2213, the 19th slot 2219, the 25th slot 2225, the 31st slot 2231, the 37th slot 2237, and the 43rd slot. Slot 2243 is the 1st slot, the 2nd slot 2202, the 8th slot 2208, the 14th slot 2214, the 20th slot 2220, the 26th slot 2226, the 32nd slot 2232, the 38th slot 2238, and the 38th slot. The 44th slot 2244 is the 2nd slot, the 3rd slot 2203, the 9th slot 2209, the 15th slot 2215, the 21st slot 2221, the 27th slot 2227, the 33rd slot 2233, and the 39th slot 2239. , 45th slot 2245 is the 3rd slot, 4th slot 2204, 10th slot 2210, 16th slot 2216, 22nd slot 2222, 28th slot 2228, 34th slot 2234, 40th Slot 2240, 46th slot 2246 is 4th slot, 5th slot 2205, 11th slot 2211, 17th slot 2217, 23rd slot 2223, 29th slot 2229, 35th slot 2235, 35th slot The 41st slot 2241 and the 47th slot 2247 are the 5th slot, the 6th slot 2206, the 12th slot 2212, the 18th slot 2218, the 24th slot 2224, the 30th slot 2230, and the 36th slot 2236. , The 42nd slot 2242 and the 48th slot 2248 are configured as the 6th slot.

As a result, since the segment conductor 40 of each phase is inserted into the three adjacent slots 22, the loss and torque ripple that occur when the rotary electric machine is driven can be reduced.

Further, by winding the windings U1, U2, V1, V2, W1, and W2 in each slot 22 in this way, the coil 30 electrically connects two tip portions 44 of the segment conductors 40 having the same phase but different from each other. The leg 41 (fourth in the present embodiment) in which the U-phase leader line 50U, the V-phase leader line 50V, and the W-phase leader line 50W are arranged in the outermost layer in the radial direction of the slot 22 without using a connecting bridge. It can be configured to connect to the tip 44 of the fourth leg 414) arranged in the layer. Further, the neutral point 70 is the tip portion 44 of the leg portion 41 (in the present embodiment, the third leg portion 413 arranged in the third layer) arranged in the second layer from the outermost layer in the radial direction of the slot 22. Can be configured to connect.

Therefore, the U-phase leader line 50U, the V-phase leader line 50V, the W-phase leader line 50W, and the neutral point 70 can be arranged on the outer side in the radial direction of the open side coil end portion 31. As a result, the U-phase leader line 50U, the V-phase leader line 50V, the W-phase leader line 50W, and the neutral point 70 can be made into a simple shape, so that the U-phase leader line 50U, the V-phase leader line 50V, W The manufacturing cost of the phase leader line 50W and the neutral point 70 can be reduced. Further, since the total lengths of the U-phase leader line 50U, the V-phase leader line 50V, the W-phase leader line 50W, and the neutral point 70 can be shortened, the vibration resistance is improved. Further, the manufacturing process when arranging the U-phase leader wire 50U, the V-phase leader wire 50V, the W-phase leader wire 50W, and the neutral point 70 on the stator 10 becomes easy.

Further, in the U-shaped segment conductor 40, since the second leg portion 412 and the third leg portion 413 separated by 5 slots in the circumferential direction are connected by the curved portion 42, the two legs are spaced by the conventional 6 slots. The height of the oblique portion 43 in the axial direction is lower than that in the case where the portions are connected, and the length of the oblique portion 43 is shorter. As a result, the resistance of the windings U1, U2, V1, V2, W1 and W2 is reduced, so that the output efficiency of the rotary electric machine is improved.

[Fifth Embodiment]
Subsequently, the stator 10 of the fifth embodiment of the present invention will be described with reference to FIG. In the following description, the same components as those of the stator 10 of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted or simplified. The stator 10 of the fifth embodiment is different from the stator 10 of the first embodiment in the way of winding the windings U1, U2, V1, V2, W1 and W2 that wind each slot 22 of the stator core 20. Further, in the stator 10 of the first embodiment, the winding U1 and the winding U2, the winding V1 and the winding V2, and the winding W1 and the winding W2 are connected in parallel, whereas the fifth embodiment is performed. In the stator 10 of the form, the winding U1 and the winding U2, the winding V1 and the winding V2, and the winding W1 and the winding W2 are connected in series, respectively. Hereinafter, how to wind each winding in the stator 10 of the fifth embodiment will be described in detail.

With reference to FIG. 9, the configuration of the coil 30 by the segment conductors 40 inserted into each slot 22 of the stator core 20 will be described. For the sake of simplicity and clarity, the 48 slots 22 of the stator core 20 are, for convenience, the first slot clockwise as shown in FIG. 2 when viewed from the second end surface 202 side of the stator core 20. It is set to 2201 to the 48th slot 2248. In FIG. 9, the numbers shown at the upper part of the horizontal axis indicate the slot numbers, and 1 to 48 correspond to the 1st slot 2201 to the 48th slot 2248, respectively. The numbers circled at the left end of the vertical axis indicate the layer numbers of the legs 41 inserted into each slot 22, and 1 to 4 are the first leg 411 to the fourth leg, respectively. Corresponds to 414.

As shown in FIG. 8B, when viewed from the second end surface 202 side of the stator core 20, on the closed side coil end portion 32 side of the coil 30, the second end portion 41b of the fourth leg portion 414 and the circumferential direction The second end 41b of the fourth leg 414 inserted clockwise into the sixth slot 22 is connected by the curved portion 42, and the pair of legs 41 of the U-shaped segment conductor 40 is connected. It has become. Further, the second end portion 41b of the third leg portion 413 and the second end portion 41b of the second leg portion 412 inserted into the fifth slot 22 clockwise in the circumferential direction are connected by the curved portion 42. It is a pair of leg portions 41 of a U-shaped segment conductor 40. Further, the second end portion 41b of the first leg portion 411 and the second end portion 41b of the first leg portion 411 inserted into the sixth slot 22 clockwise in the circumferential direction are connected by the curved portion 42. It is a pair of leg portions 41 of a U-shaped segment conductor 40.

Further, when viewed from the second end surface 202 side of the stator core 20, on the open side coil end portion 31 side of the coil 30, of the four layers of leg portions 41 inserted into each slot 22 of the stator core 20, the first leg portion 411 The slanted portion 43 of the third leg portion 413 is slanted in the counterclockwise direction in the circumferential direction. The oblique portion 43 of the second leg portion 412 and the fourth leg portion 414 is oblique in the clockwise direction in the circumferential direction.

Then, the tip portion 44 of the fourth leg portion 414 excluding the tip portion 44 of the fourth leg portion 414 inserted into the second slot 2202, which will be described later, is inserted into the sixth slot 22 clockwise in the circumferential direction. It is electrically connected to the tip end portion 44 of the third leg portion 413, and the first joint portion 451 is formed. The tip 44 of the fourth leg 414 inserted into the second slot 2202, which will be described later, is the third leg inserted into the fifth slot 22, that is, the seventh slot 2207, which will be described later, clockwise in the circumferential direction. It is electrically connected to the tip end portion 44 of the portion 413, and a third joint portion 453 is formed. Further, the tip 44 of the first leg 411 is electrically connected to the tip 44 of the second leg 412 inserted into the sixth slot 22 counterclockwise in the circumferential direction, and is second. A joint 452 is formed.

Therefore, when viewed from the second end surface 202 side of the stator core 20, in the U-shaped segment conductor 40, the fourth leg portions 414 separated by 6 slots in the circumferential direction are connected to each other by the curved portion 42, and 6 in the circumferential direction. The first leg portions 411 separated by slots are connected to each other by the curved portion 42, and the second leg portion 412 and the third leg portion 413 separated by 5 slots in the circumferential direction are connected by the curved portion 42. Further, when viewed from the second end surface 202 side of the stator core 20, the U-shaped segment conductor 40 is a U-shaped segment conductor 40 in which the oblique portion 43 and the tip portion 44 are separated by 6 slots in the circumferential direction. It is electrically connected to the tip 44 of the leg 41. Then, the oblique portion 43 of the fourth leg portion 414 inserted into the second slot 2202 and the oblique portion 43 of the third leg portion 413 inserted into the seventh slot 2207 are subjected to special bending processing. The tip 44 of the leg 41, which is separated from each other by 5 slots in the circumferential direction, is connected by the third joint 453.

Next, the configuration of the V-phase coil 30V among the three-phase coils of the U-phase coil 30U, the V-phase coil 30V, and the W-phase coil 30W constituting the coil 30 will be described. As for the 48 slots 22 of the stator core 20, in order to simplify and clarify the explanation, as shown in FIG. 2, for convenience, as viewed from the second end surface 202 side of the stator core 20, as in the first embodiment. , No. 1 slot 2201 to No. 48 slot 2248 in the clockwise direction.

The V-phase coil 30V is configured by connecting two windings V1 and V2 in series. One end of the winding V1 is composed of the tip 44 of the fourth leg 414 inserted into the first slot 2201 and is electrically connected to the V-phase leader line 50V. The other end of the winding V1 is formed at the tip 44 of the third leg 413 inserted into the seventh slot 2207, and is connected to one end of the winding V2. One end of the winding V2 is composed of a fourth leg 414 inserted into the second slot 2202. The diagonal portion 43 of the third leg portion 413 inserted into the seventh slot 2207 forming the other end of the winding V1, and the second slot 2202 inserted into the second slot 2202 forming one end of the winding V2. The oblique portion 43 of the four leg portions 414 is specially bent at an angle different from that of the other oblique portions 43, and the tip portion 44 of the third leg portion 413 inserted into the seventh slot 2207 and the second portion 44. The tip 44 of the fourth leg 414 inserted into the slot 2202 is electrically connected to form the third joint 453. The other end of the winding V2 is formed at the tip 44 of the third leg 413 inserted into the eighth slot 2208, and is electrically connected to the neutral point 70.

The winding V1 is on the open side coil end 31 side, starting from the tip 44 of the fourth leg 414 inserted into the first slot 2201, and the fourth leg 414 inserted into the second slot 2202. Is connected to the fourth leg portion 414 inserted into the seventh slot 2207 by the curved portion 42 on the closed side coil end portion 32 side. The fourth leg portion 414 inserted into the seventh slot 2207 is connected to the third leg portion 413 inserted into the thirteenth slot 2213 by the first joint portion 451 on the open side coil end portion 31 side. The third leg portion 413 inserted into the thirteenth slot 2213 is connected to the second leg portion 412 inserted into the eighteenth slot 2218 by the curved portion 42 on the closed side coil end portion 32 side. The second leg portion 412 inserted into the 18th slot 2218 is connected to the first leg portion 411 inserted into the 24th slot 2224 by the second joint portion 452 on the open side coil end portion 31 side. The first leg portion 411 inserted into the 24th slot 2224 is connected to the first leg portion 411 inserted into the 30th slot 2230 by the curved portion 42 on the closed side coil end portion 32 side. The first leg portion 411 inserted into the 30th slot 2230 is connected to the second leg portion 412 inserted into the 24th slot 2224 by the second joint portion 452 on the open side coil end portion 31 side. The second leg portion 412 inserted into the 24th slot 2224 is connected to the third leg portion 413 inserted into the 19th slot 2219 by the curved portion 42 on the closed side coil end portion 32 side. The third leg portion 413 inserted into the 19th slot 2219 is connected to the fourth leg portion 414 inserted into the 13th slot 2213 by the first joint portion 451 on the open side coil end portion 31 side. The fourth leg portion 414 inserted into the thirteenth slot 2213 is connected to the fourth leg portion 414 inserted into the 19th slot 2219 by the curved portion 42 on the closed side coil end portion 32 side. The fourth leg portion 414 inserted into the 19th slot 2219 is connected to the third leg portion 413 inserted into the 25th slot 2225 by the first joint portion 451 on the open side coil end portion 31 side. The third leg portion 413 inserted into the 25th slot 2225 is connected to the second leg portion 412 inserted into the 30th slot 2230 by the curved portion 42 on the closed side coil end portion 32 side. The second leg portion 412 inserted into the 30th slot 2230 is connected to the first leg portion 411 inserted into the 36th slot 2236 by the second joint portion 452 on the open side coil end portion 31 side. The first leg portion 411 inserted into the 36th slot 2236 is connected to the first leg portion 411 inserted into the 42nd slot 2242 by the curved portion 42 on the closed side coil end portion 32 side. The first leg portion 411 inserted into the 42nd slot 2242 is connected to the second leg portion 412 inserted into the 36th slot 2236 by the second joint portion 452 on the open side coil end portion 31 side. The second leg portion 412 inserted into the 36th slot 2236 is connected to the third leg portion 413 inserted into the 31st slot 2231 by the curved portion 42 on the closed side coil end portion 32 side. The third leg portion 413 inserted into the 31st slot 2231 is connected to the fourth leg portion 414 inserted into the 25th slot 2225 by the first joint portion 451 on the open side coil end portion 31 side. The fourth leg portion 414 inserted into the 25th slot 2225 is connected to the fourth leg portion 414 inserted into the 31st slot 2231 by the curved portion 42 on the closed side coil end portion 32 side. The fourth leg portion 414 inserted into the 31st slot 2231 is connected to the third leg portion 413 inserted into the 37th slot 2237 by the first joint portion 451 on the open side coil end portion 31 side. The third leg portion 413 inserted into the 37th slot 2237 is connected to the second leg portion 412 inserted into the 42nd slot 2242 by the curved portion 42 on the closed side coil end portion 32 side. The second leg portion 412 inserted into the 42nd slot 2242 is connected to the first leg portion 411 inserted into the 48th slot 2248 by the second joint portion 452 on the open side coil end portion 31 side. The first leg portion 411 inserted into the 48th slot 2248 is connected to the first leg portion 411 inserted into the sixth slot 2206 by the curved portion 42 on the closed side coil end portion 32 side. The first leg portion 411 inserted into the sixth slot 2206 is connected to the second leg portion 412 inserted into the 48th slot 2248 by the second joint portion 452 on the open side coil end portion 31 side. The second leg portion 412 inserted into the 48th slot 2248 is connected to the third leg portion 413 inserted into the 43rd slot 2243 by the curved portion 42 on the closed side coil end portion 32 side. The third leg portion 413 inserted into the 43rd slot 2243 is connected to the fourth leg portion 414 inserted into the 37th slot 2237 by the first joint portion 451 on the open side coil end portion 31 side. The fourth leg portion 414 inserted into the 37th slot 2237 is connected to the fourth leg portion 414 inserted into the 43rd slot 2243 by the curved portion 42 on the closed side coil end portion 32 side. The fourth leg portion 414 inserted into the 43rd slot 2243 is connected to the third leg portion 413 inserted into the first slot 2201 by the first joint portion 451 on the open side coil end portion 31 side. The third leg portion 413 inserted into the first slot 2201 is connected to the second leg portion 412 inserted into the sixth slot 2206 by the curved portion 42 on the closed side coil end portion 32 side. The second leg portion 412 inserted into the sixth slot 2206 is connected to the first leg portion 411 inserted into the twelfth slot 2212 by the second joint portion 452 on the open side coil end portion 31 side. The first leg portion 411 inserted into the twelfth slot 2212 is connected to the first leg portion 411 inserted into the eighteenth slot 2218 by the curved portion 42 on the closed side coil end portion 32 side. The first leg portion 411 inserted into the 18th slot 2218 is connected to the second leg portion 412 inserted into the 12th slot 2212 by the second joint portion 452 on the open side coil end portion 31 side. The second leg portion 412 inserted into the twelfth slot 2212 is connected to the third leg portion 413 inserted into the seventh slot 2207 by the curved portion 42 on the closed side coil end portion 32 side. The third leg portion 413 inserted into the seventh slot 2207 is on the open side coil end portion 31 side, the tip portion 44 becomes the end point of the winding V1, and one end portion of the winding V2 is provided by the third joint portion 453. It is connected to the tip end portion 44 of the fourth leg portion 414 inserted into the second slot 2202 constituting the above.

By winding the winding V1 around the stator core 20 in this way, the winding V1 forms eight poles on the stator 10.

The winding V2 is on the open side coil end 31 side, starting from the tip 44 of the fourth leg 414 inserted into the second slot 2202, and the fourth leg 414 inserted into the second slot 2202. Is connected to the fourth leg portion 414 inserted into the eighth slot 2208 by the curved portion 42 on the closed side coil end portion 32 side. The fourth leg portion 414 inserted into the eighth slot 2208 is connected to the third leg portion 413 inserted into the 14th slot 2214 by the first joint portion 451 on the open side coil end portion 31 side. The third leg portion 413 inserted into the 14th slot 2214 is connected to the second leg portion 412 inserted into the 19th slot 2219 by the curved portion 42 on the closed side coil end portion 32 side. The second leg portion 412 inserted into the 19th slot 2219 is connected to the first leg portion 411 inserted into the 25th slot 2225 by the second joint portion 452 on the open side coil end portion 31 side. The first leg portion 411 inserted into the 25th slot 2225 is connected to the first leg portion 411 inserted into the 31st slot 2231 by the curved portion 42 on the closed side coil end portion 32 side. The first leg portion 411 inserted into the 31st slot 2231 is connected to the second leg portion 412 inserted into the 25th slot 2225 by the second joint portion 452 on the open side coil end portion 31 side. The second leg portion 412 inserted into the 25th slot 2225 is connected to the third leg portion 413 inserted into the 20th slot 2220 by the curved portion 42 on the closed side coil end portion 32 side. The third leg portion 413 inserted into the 20th slot 2220 is connected to the fourth leg portion 414 inserted into the 14th slot 2214 by the first joint portion 451 on the open side coil end portion 31 side. The fourth leg portion 414 inserted into the 14th slot 2214 is connected to the fourth leg portion 414 inserted into the 20th slot 2220 by the curved portion 42 on the closed side coil end portion 32 side. The fourth leg portion 414 inserted into the 20th slot 2220 is connected to the third leg portion 413 inserted into the 26th slot 2226 by the first joint portion 451 on the open side coil end portion 31 side. The third leg portion 413 inserted into the 26th slot 2226 is connected to the second leg portion 412 inserted into the 31st slot 2231 by the curved portion 42 on the closed side coil end portion 32 side. The second leg portion 412 inserted into the 31st slot 2231 is connected to the first leg portion 411 inserted into the 37th slot 2237 by the second joint portion 452 on the open side coil end portion 31 side. The first leg portion 411 inserted into the 37th slot 2237 is connected to the first leg portion 411 inserted into the 43rd slot 2243 by the curved portion 42 on the closed side coil end portion 32 side. The first leg portion 411 inserted into the 43rd slot 2243 is connected to the second leg portion 412 inserted into the 37th slot 2237 by the second joint portion 452 on the open side coil end portion 31 side. The second leg portion 412 inserted into the 37th slot 2237 is connected to the third leg portion 413 inserted into the 32nd slot 2232 by the curved portion 42 on the closed side coil end portion 32 side. The third leg portion 413 inserted into the 32nd slot 2232 is connected to the fourth leg portion 414 inserted into the 26th slot 2226 by the first joint portion 451 on the open side coil end portion 31 side. The fourth leg portion 414 inserted into the 26th slot 2226 is connected to the fourth leg portion 414 inserted into the 32nd slot 2232 by the curved portion 42 on the closed side coil end portion 32 side. The fourth leg portion 414 inserted into the 32nd slot 2232 is connected to the third leg portion 413 inserted into the 38th slot 2238 by the first joint portion 451 on the open side coil end portion 31 side. The third leg portion 413 inserted into the 38th slot 2238 is connected to the second leg portion 412 inserted into the 43rd slot 2243 by the curved portion 42 on the closed side coil end portion 32 side. The second leg portion 412 inserted into the 43rd slot 2243 is connected to the first leg portion 411 inserted into the first slot 2201 by the second joint portion 452 on the open side coil end portion 31 side. The first leg portion 411 inserted into the first slot 2201 is connected to the first leg portion 411 inserted into the seventh slot 2207 by the curved portion 42 on the closed side coil end portion 32 side. The first leg portion 411 inserted into the seventh slot 2207 is connected to the second leg portion 412 inserted into the first slot 2201 by the second joint portion 452 on the open side coil end portion 31 side. The second leg portion 412 inserted into the first slot 2201 is connected to the third leg portion 413 inserted into the 44th slot 2244 by the curved portion 42 on the closed side coil end portion 32 side. The third leg portion 413 inserted into the 44th slot 2244 is connected to the fourth leg portion 414 inserted into the 38th slot 2238 by the first joint portion 451 on the open side coil end portion 31 side. The fourth leg portion 414 inserted into the 38th slot 2238 is connected to the fourth leg portion 414 inserted into the 44th slot 2244 by the curved portion 42 on the closed side coil end portion 32 side. The fourth leg portion 414 inserted into the 44th slot 2244 is connected to the third leg portion 413 inserted into the second slot 2202 by the first joint portion 451 on the open side coil end portion 31 side. The third leg portion 413 inserted into the second slot 2202 is connected to the second leg portion 412 inserted into the seventh slot 2207 by the curved portion 42 on the closed side coil end portion 32 side. The second leg portion 412 inserted into the seventh slot 2207 is connected to the first leg portion 411 inserted into the thirteenth slot 2213 by the second joint portion 452 on the open side coil end portion 31 side. The first leg portion 411 inserted into the 13th slot 2213 is connected to the first leg portion 411 inserted into the 19th slot 2219 by the curved portion 42 on the closed side coil end portion 32 side. The first leg portion 411 inserted into the 19th slot 2219 is connected to the second leg portion 412 inserted into the 13th slot 2213 by the second joint portion 452 on the open side coil end portion 31 side. The second leg portion 412 inserted into the thirteenth slot 2213 is connected to the third leg portion 413 inserted into the eighth slot 2208 by the curved portion 42 on the closed side coil end portion 32 side. The third leg portion 413 inserted into the eighth slot 2208 is on the open side coil end portion 31 side, and the tip portion 44 serves as the end point of the winding V2 and connects to the neutral point 70.

By winding the winding V2 around the stator core 20 in this way, the winding V2 forms eight poles on the stator 10. The winding V2 is formed so as to be wound in the same manner as the winding V1 at a position displaced by one slot clockwise from the winding V1 when viewed from the second end surface 202 side of the stator core 20. ..

Like the V-phase coil 30V, the U-phase coil 30U is configured by connecting two windings U1 and U2 in series. One end of the winding U1 is formed by the tip 44 of the fourth leg 414 inserted into the 45th slot 2245 on the open side coil end 31 side, and is electrically connected to the U-phase leader wire 50U. ing. The other end of the winding U1 is formed at the tip 44 of the third leg 413 inserted into the third slot 2203 and is connected to one end of the winding U2. One end of the winding U2 is composed of a fourth leg 414 inserted into the 46th slot 2246. The diagonal portion 43 of the third leg portion 413 inserted into the third slot 2203 forming the other end of the winding U1, and the 46th slot 2246 inserted into the 46th slot 2246 forming one end of the winding U2. The slanted portion 43 of the four leg portion 414 is specially bent at an angle different from that of the other slanted portion 43, and the tip portion 44 of the third leg portion 413 inserted into the third slot 2203 and the 46th The tip portion 44 of the fourth leg portion 414 inserted into the slot 2246 is electrically connected to form the third joint portion 453. The other end of the winding U2 is formed at the tip 44 of the third leg 413 inserted into the fourth slot 2204 and is electrically connected to the neutral point 70.

The winding U1 is wound on the open side coil end 31 side, starting from the tip 44 of the fourth leg 414 inserted into the 45th slot 2245, and viewed from the second end surface 202 side of the stator core 20. It is formed so as to be wound in the same manner as the winding V1 at a position deviated by 4 slots counterclockwise from V1 in the circumferential direction. Then, the winding U1 forms eight poles on the stator 10, and the tip portion 44 of the third leg portion 413 inserted into the third slot 2203 on the open side coil end portion 31 side is formed on the winding U1. It is the end point and is electrically connected to the tip end 44 of the fourth leg 414 inserted into the 46th slot 2246 which constitutes one end of the winding U2.

The winding U2 is wound on the open side coil end 31 side, starting from the tip 44 of the fourth leg 414 inserted into the 46th slot 2246, as viewed from the second end surface 202 side of the stator core 20. It is formed so as to be wound in the same manner as the winding V2 at a position deviated by 4 slots counterclockwise from V2 in the circumferential direction. Then, the winding U2 forms eight poles on the stator 10, and the tip portion 44 of the third leg portion 413 inserted into the fourth slot 2204 on the open side coil end portion 31 side is formed on the winding U2. It becomes the end point and is connected to the neutral point 70.

The W-phase coil 30W is configured by connecting two windings W1 and W2 in series, similarly to the U-phase coil 30U and the V-phase coil 30V. One end of the winding W1 is formed on the open side coil end 31 side by the tip 44 of the fourth leg 414 inserted into the fifth slot 2205, and is electrically connected to the W phase leader line 50W. ing. The other end of the winding W1 is formed at the tip 44 of the third leg 413 inserted into the eleventh slot 2211 and is connected to one end of the winding W2. One end of the winding W2 is composed of a fourth leg 414 inserted into the sixth slot 2206. The diagonal portion 43 of the third leg portion 413 inserted into the eleventh slot 2211 forming the other end of the winding W1, and the sixth slot 2206 inserted into the sixth slot 2206 forming one end of the winding W2. The oblique portion 43 of the four leg portions 414 is specially bent at an angle different from that of the other oblique portions 43, and the tip portion 44 of the third leg portion 413 inserted into the eleventh slot 2211 and the sixth leg portion 413. The tip 44 of the fourth leg 414 inserted into the slot 2206 is electrically connected to form the third joint 453. The other end of the winding U2 is configured at the tip 44 of the third leg 413 inserted into the twelfth slot 2212 and is electrically connected to the neutral point 70.

The winding W1 is wound on the open side coil end 31 side, starting from the tip 44 of the fourth leg 414 inserted into the fifth slot 2205, and viewed from the second end surface 202 side of the stator core 20. It is formed so as to be wound in the same manner as the winding V1 at a position displaced by 4 slots clockwise from V1 in the circumferential direction. Then, the winding W1 forms eight poles on the stator 10, and the tip portion 44 of the third leg portion 413 inserted into the eleventh slot 2211 on the open side coil end portion 31 side is the winding U1. It serves as the end point and is electrically connected to the tip end 44 of the fourth leg 414 inserted into the sixth slot 2206 forming one end of the winding U2.

The winding W2 is wound on the open side coil end 31 side, starting from the tip 44 of the fourth leg 414 inserted into the sixth slot 2206, and viewed from the second end surface 202 side of the stator core 20. It is formed so as to be wound in the same manner as the winding V2 at a position displaced by 4 slots clockwise from V2 in the circumferential direction. Then, the winding W2 forms eight poles on the stator 10, and the tip portion 44 of the third leg portion 413 inserted into the twelfth slot 2212 on the open side coil end portion 31 side is formed on the winding U2. It becomes the end point and is connected to the neutral point 70.

Therefore, each slot 22 of the stator core 20 is a first slot in which the V-phase segment conductor 40 is inserted, a second slot in which the V-phase segment conductor 40 and the U-phase segment conductor 40 are inserted, and a U-phase segment. The third slot in which the conductor 40 is inserted, the fourth slot in which the U-phase segment conductor 40 and the W-phase segment conductor 40 are inserted, the fifth slot in which the W-phase segment conductor 40 is inserted, and the W-phase segment. The sixth slot into which the conductor 40 and the V-phase segment conductor 40 are inserted is periodically arranged in this order in the circumferential direction. In the present embodiment, the 1st slot 2201, the 7th slot 2207, the 13th slot 2213, the 19th slot 2219, the 25th slot 2225, the 31st slot 2231, the 37th slot 2237, and the 43rd slot. Slot 2243 is the 1st slot, the 2nd slot 2202, the 8th slot 2208, the 14th slot 2214, the 20th slot 2220, the 26th slot 2226, the 32nd slot 2232, the 38th slot 2238, and the 38th slot. The 44th slot 2244 is the 2nd slot, the 3rd slot 2203, the 9th slot 2209, the 15th slot 2215, the 21st slot 2221, the 27th slot 2227, the 33rd slot 2233, and the 39th slot 2239. , 45th slot 2245 is the 3rd slot, 4th slot 2204, 10th slot 2210, 16th slot 2216, 22nd slot 2222, 28th slot 2228, 34th slot 2234, 40th Slot 2240, 46th slot 2246 is 4th slot, 5th slot 2205, 11th slot 2211, 17th slot 2217, 23rd slot 2223, 29th slot 2229, 35th slot 2235, 35th slot The 41st slot 2241 and the 47th slot 2247 are the 5th slot, the 6th slot 2206, the 12th slot 2212, the 18th slot 2218, the 24th slot 2224, the 30th slot 2230, and the 36th slot 2236. , The 42nd slot 2242 and the 48th slot 2248 are configured as the 6th slot.

As a result, since the segment conductor 40 of each phase is inserted into the three adjacent slots 22, the loss and torque ripple that occur when the rotary electric machine is driven can be reduced.

Further, by winding the windings U1, U2, V1, V2, W1, and W2 in each slot 22 in this way, the coil 30 electrically connects two tip portions 44 of the segment conductors 40 having the same phase but different from each other. The leg 41 (fourth in the present embodiment) in which the U-phase leader line 50U, the V-phase leader line 50V, and the W-phase leader line 50W are arranged in the outermost layer in the radial direction of the slot 22 without using a connecting bridge. It can be configured to connect to the tip 44 of the fourth leg 414) arranged in the layer. Further, the neutral point 70 is the tip portion 44 of the leg portion 41 (in the present embodiment, the third leg portion 413 arranged in the third layer) arranged in the second layer from the outermost layer in the radial direction of the slot 22. Can be configured to connect.

Therefore, the U-phase leader line 50U, the V-phase leader line 50V, the W-phase leader line 50W, and the neutral point 70 can be arranged on the outer side in the radial direction of the open side coil end portion 31. As a result, the U-phase leader line 50U, the V-phase leader line 50V, the W-phase leader line 50W, and the neutral point 70 can be made into a simple shape, so that the U-phase leader line 50U, the V-phase leader line 50V, W The manufacturing cost of the phase leader line 50W and the neutral point 70 can be reduced. Further, since the total lengths of the U-phase leader line 50U, the V-phase leader line 50V, the W-phase leader line 50W, and the neutral point 70 can be shortened, the vibration resistance is improved. Further, the manufacturing process when arranging the U-phase leader wire 50U, the V-phase leader wire 50V, the W-phase leader wire 50W, and the neutral point 70 on the stator 10 becomes easy.

Further, the windings U1, U2, V1, V2, W1, and W2 are wound around each slot 22 in this way, and the tip 44 of the fourth leg 414 inserted into the second slot 2202 and the seventh slot The third leg portion 413 inserted into the 2207 is subjected to a special bending process, so that the winding U1 and the winding U2, the winding V1 and the winding V2, and the winding W1 and the winding W2 are not used. Can be connected in series. Further, the oblique portion 43 of the fourth leg portion 414 inserted into the second slot 2202 and the oblique portion 43 of the third leg portion 413 inserted into the seventh slot 2207 are outermost in the radial direction. Since it is located at, the third joint portion 453 can be easily formed.

Further, in the U-shaped segment conductor 40, since the second leg portion 412 and the third leg portion 413 separated by 5 slots in the circumferential direction are connected by the curved portion 42, the two legs are spaced by the conventional 6 slots. The height of the oblique portion 43 in the axial direction is lower than that in the case where the portions are connected, and the length of the oblique portion 43 is shorter. As a result, the resistance of the windings U1, U2, V1, V2, W1 and W2 is reduced, so that the output efficiency of the rotary electric machine is improved.

Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and can be appropriately modified, improved, and the like.

In addition, at least the following matters are described in this specification. The components and the like corresponding to the above-described embodiments are shown in parentheses, but the present invention is not limited thereto.

(1) It has a plurality of teeth (teeth 21) protruding inward in the radial direction at predetermined intervals along the circumferential direction, and a plurality of slots (slots 22) which are spaces between the teeth adjacent to each other in the circumferential direction. A substantially ring-shaped stator core (stator core 20) and
It is composed of U-phase, V-phase, and W-phase windings (windings U1, U2, V1, V2, W1, W2) formed by a plurality of segment conductors (segment conductors 40) inserted into the plurality of slots. With a coil (coil 30)
Each said segment conductor
A pair of pairs extending parallel to each other, having a first end (first end 41a) and a second end (second end 41b), arranged inside the slot and extending substantially linearly in the axial direction. Legs (legs 41) and
It is provided with a curved portion (curved portion 42) that connects the second ends of the pair of legs to each other, and has a substantially U-shape.
The first end of the pair of legs protrudes outward from the axial first end surface (first end surface 201) of the stator core, and is in the first direction (clockwise direction) or the second direction in the circumferential direction. An oblique portion (oblique portion 43) extending obliquely in the (counterclockwise direction) and a tip portion (tip portion 44) extending axially outward from the tip of the skew portion are formed.
The curved portion projects outward from the axial second end surface (second end surface 202) of the stator core.
The coil
An open side coil end portion (open side coil end portion 31) formed by the oblique portion and the tip portion of the segment conductor and projecting outward in the axial direction from the first end surface of the stator core.
It has a closed-side coil end portion (closed-side coil end portion 32) formed by the curved portion of the segment conductor and projecting outward in the axial direction from the second end surface of the stator core.
A stator (stator 10) of a rotary electric machine in which the legs of the plurality of segment conductors are inserted in a plurality of layers in a row in the radial direction in the plurality of slots.
The plurality of slots of the stator core are the first slot (first slot 2201, seventh slot 2207) into which the segment conductor of the first phase (V phase) of the U phase, V phase, and W phase is inserted. , 13th slot 2213, 19th slot 2219, 25th slot 2225, 31st slot 2231, 37th slot 2237, 43rd slot 2243), said segment conductor and U phase of the first phase, The second slot (2nd slot 2202, 8th slot 2208, 14th slot 2214, 20th slot) into which the segment conductor of the second phase (W phase) of the V phase and the W phase is inserted. 2220, 26th slot 2226, 32nd slot 2232, 38th slot 2238, 44th slot 2244), 3rd slot (3rd slot 2203, 3rd slot) into which the segment conductor of the second phase is inserted. 9th slot 2209, 15th slot 2215, 21st slot 2221, 27th slot 2227, 33rd slot 2233, 39th slot 2239, 45th slot 2245), the segment conductor of the second phase. And the fourth slot (4th slot 2204, 10th slot 2210, 16th slot 2216, in which the segment conductor of the third phase (W phase) of the U phase, V phase, and W phase is inserted. 22nd slot 2222, 28th slot 2228, 34th slot 2234, 40th slot 2240, 46th slot 2246), and 5th slot (5th slot) into which the segment conductor of the third phase is inserted. Slot 2205, 11th slot 2211, 17th slot 2217, 23rd slot 2223, 29th slot 2229, 35th slot 2235, 41st slot 2241, 47th slot 2247), and the above-mentioned first The sixth slot (sixth slot 2206, twelfth slot 2212, 18th slot 2218, 24th slot 2224, 30th) into which the three-phase segment conductor and the first phase segment conductor are inserted. Slot 2230, slot 2236, slot 4242, slot 48) are arranged periodically in this order in the circumferential direction.
A stator of a rotary electric machine in which at least a part of the legs of the segment conductor is connected to the legs of the segment conductor 5 slots apart in the circumferential direction by at least one of the curved portion and the tip portion.

According to (1), since the segment conductors of each phase are inserted into three adjacent slots, it is possible to reduce the loss and torque ripple that occur when the rotary electric machine is driven. Further, since the legs of at least a part of the segment conductor are connected to the legs of the segment conductor 5 slots apart in the circumferential direction by at least one of the curved portion and the tip portion, at least one of the curved portion and the tip portion. The height in the axial direction of is lowered, and the length of at least one of the curved portion and the tip portion is shortened. As a result, the resistance of the winding is reduced, so that the output efficiency of the rotary electric machine is improved.

(2) The stator of the rotary electric machine according to (1).
The winding of each phase has one end and the other end.
One end of the winding of each phase is electrically connected to a leader wire (U-phase leader wire 50U, V-phase leader wire 50V, W-phase leader wire 50W).
The one end portion is a stator of a rotary electric machine, which is composed of the tip end portion of the leg portion arranged in the outermost layer in the radial direction of the predetermined slot.

According to (2), since the leader wire is connected to the tip end portion of the leg portion arranged in the outermost layer in the radial direction of the predetermined slot, the leader wire can be arranged radially outside the open side coil end portion. .. As a result, the leader wire can be made into a simple shape, so that the manufacturing cost of the leader wire can be reduced. Further, since the total length of the leader wire can be shortened, the vibration resistance is improved. In addition, the manufacturing process when arranging the leader wire on the stator becomes easy.

(3) The stator of the rotary electric machine according to (1).
The stator core has 48 said slots.
In the slot, the legs of the segment conductor are inserted in four layers in a row in the radial direction.
The legs include a first leg (first leg 411) arranged in the first layer from the inner side in the radial direction, a second leg (second leg 412) arranged in the second layer, and three. It has a third leg portion (third leg portion 413) arranged in the layer layer and a fourth leg portion (fourth leg portion 414) arranged in the fourth layer.
The segment conductor is
The pair of legs are arranged by the curved portion at intervals of 6 slots in the circumferential direction.
The tip is connected to the tip of the leg of the segment conductor 5 slots apart in the circumferential direction.
The winding of each phase has one end and the other end.
One end of the winding of each phase is electrically connected to a leader wire (U-phase leader wire 50U, V-phase leader wire 50V, W-phase leader wire 50W).
The other end of the winding of each phase is electrically connected to the neutral point (neutral point 70).
The one end is composed of the tip of the fourth leg inserted into the predetermined slot.
The other end is a stator of a rotary electric machine, which is composed of the tip of the third leg inserted into a different predetermined slot.

According to (3), the coil is a fourth leg in which the leader wire is arranged in the outermost layer in the radial direction of the slot without using a bridge that electrically connects two tips of different segment conductors in the same phase. It is configured to connect to the tip of the portion, and the neutral point is configured to connect to the tip of the third leg located in the second layer from the outermost layer in the radial direction of the slot. Therefore, the leader wire and the neutral point can be arranged on the radial outer side of the open side coil end portion. As a result, the leader wire and the neutral point can be made into a simple shape, so that the manufacturing cost of the leader wire and the neutral point can be reduced. Further, since the total length of the leader line and the neutral point can be shortened, the vibration resistance is improved. In addition, the manufacturing process when arranging the leader wire and the neutral point on the stator becomes easy.

(4) The stator of the rotary electric machine according to (1).
The stator core has 48 said slots.
In the slot, the legs of the segment conductor are inserted in four layers in a row in the radial direction.
The legs include a first leg (first leg 411) arranged in the first layer from the inside in the radial direction, a second leg (second leg 412) arranged in the second layer, and three. It has a third leg portion (third leg portion 413) arranged in the layer layer and a fourth leg portion (fourth leg portion 414) arranged in the fourth layer.
The segment conductor is
The fourth legs separated by 6 slots in the circumferential direction are connected by the curved portion, and the first legs separated by 6 slots in the circumferential direction are connected by the curved portion, and 7 in the circumferential direction. The second leg portion and the third leg portion separated from each other by the slot are connected by the curved portion.
The tip is connected to the tip of the leg of the segment conductor 5 slots apart in the circumferential direction.
The winding of each phase has one end and the other end.
One end of the winding of each phase is electrically connected to a leader wire (U-phase leader wire 50U, V-phase leader wire 50V, W-phase leader wire 50W).
The other end of the winding of each phase is electrically connected to the neutral point (neutral point 70).
The one end is composed of the tip of the fourth leg inserted into the predetermined slot.
The other end is a stator of a rotary electric machine, which is composed of the tip of the fourth leg inserted into a different predetermined slot.

According to (4), the coil is a fourth leg in which the leader wire is arranged in the outermost layer in the radial direction of the slot without using a bridge that electrically connects two tips of different segment conductors in the same phase. It is configured to connect to the tip of the portion, and the neutral point is configured to connect to the tip of the third leg located in the second layer from the outermost layer in the radial direction of the slot. Therefore, the leader wire and the neutral point can be arranged on the radial outer side of the open side coil end portion. As a result, the leader wire and the neutral point can be made into a simple shape, so that the manufacturing cost of the leader wire and the neutral point can be reduced. Further, since the total length of the leader line and the neutral point can be shortened, the vibration resistance is improved. In addition, the manufacturing process when arranging the leader wire and the neutral point on the stator becomes easy.

(5) The stator of the rotary electric machine according to (1).
The stator core has 48 said slots.
In the slot, the legs of the segment conductor are inserted in four layers in a row in the radial direction.
The legs include a first leg (first leg 411) arranged in the first layer from the inside in the radial direction, a second leg (second leg 412) arranged in the second layer, and three. It has a third leg portion (third leg portion 413) arranged in the layer layer and a fourth leg portion (fourth leg portion 414) arranged in the fourth layer.
The segment conductor is
The fourth legs separated by 6 slots in the circumferential direction are connected by the curved portion, and the first legs separated by 6 slots in the circumferential direction are connected by the curved portion, and 5 in the circumferential direction. The second leg portion and the third leg portion separated from each other by the slot are connected by the curved portion.
The tip is electrically connected to the tip of the leg of the segment conductor 6 slots apart in the circumferential direction.
The winding of each phase has one end and the other end.
One end of the winding of each phase is electrically connected to a leader wire (U-phase leader wire 50U, V-phase leader wire 50V, W-phase leader wire 50W).
The other end of the winding of each phase is electrically connected to the neutral point (neutral point 70).
The one end is composed of the tip of the fourth leg inserted into the predetermined slot.
The other end is a stator of a rotary electric machine, which is composed of the tip of the fourth leg inserted into a different predetermined slot.

According to (5), the coil is a fourth leg in which the leader wire is arranged in the outermost layer in the radial direction of the slot without using a bridge that electrically connects two tips of different segment conductors in the same phase. It is configured to connect to the tip of the portion, and the neutral point is configured to connect to the tip of the third leg located in the second layer from the outermost layer in the radial direction of the slot. Therefore, the leader wire and the neutral point can be arranged on the radial outer side of the open side coil end portion. As a result, the leader wire and the neutral point can be made into a simple shape, so that the manufacturing cost of the leader wire and the neutral point can be reduced. Further, since the total length of the leader line and the neutral point can be shortened, the vibration resistance is improved. In addition, the manufacturing process when arranging the leader wire and the neutral point on the stator becomes easy.

(6) The stator of the rotary electric machine according to (1).
The stator core has 48 said slots.
In the slot, the legs of the segment conductor are inserted in four layers in a row in the radial direction.
The legs include a first leg (first leg 411) arranged in the first layer from the inside in the radial direction, a second leg (second leg 412) arranged in the second layer, and three. It has a third leg portion (third leg portion 413) arranged in the layer layer and a fourth leg portion (fourth leg portion 414) arranged in the fourth layer.
The segment conductor is
The fourth legs separated by 6 slots in the circumferential direction are connected by the curved portion, and the first legs separated by 6 slots in the circumferential direction are connected by the curved portion, and 5 in the circumferential direction. The second leg portion and the third leg portion 413 separated from each other by the slot are connected by the curved portion 42.
The tip of the fourth leg inserted into the specific slot is connected to the tip of the third leg separated by 5 slots in the circumferential direction.
The other tip is connected to the tip of the leg of the segment conductor 6 slots apart in the circumferential direction.
The winding of each phase has one end and the other end.
One end of the winding of each phase is electrically connected to a leader wire (U-phase leader wire 50U, V-phase leader wire 50V, W-phase leader wire 50W).
The other end of the winding of each phase is electrically connected to the neutral point (neutral point 70).
The one end is composed of the tip of the fourth leg inserted into the predetermined slot.
The other end is a stator of a rotary electric machine, which is composed of the tip of the fourth leg inserted into a different predetermined slot.

According to (6), the coil is a fourth leg in which the leader wire is arranged in the outermost layer in the radial direction of the slot without using a bridge that electrically connects two tips of different segment conductors in the same phase. It is configured to connect to the tip of the portion, and the neutral point is configured to connect to the tip of the third leg located in the second layer from the outermost layer in the radial direction of the slot. Therefore, the leader wire and the neutral point can be arranged on the radial outer side of the open side coil end portion. As a result, the leader wire and the neutral point can be made into a simple shape, so that the manufacturing cost of the leader wire and the neutral point can be reduced. Further, since the total length of the leader line and the neutral point can be shortened, the vibration resistance is improved. In addition, the manufacturing process when arranging the leader wire and the neutral point on the stator becomes easy.
Furthermore, by connecting the tip of the 4th leg inserted into a specific slot and the tip of the 3rd leg 5 slots apart in the circumferential direction, two windings of each phase can be performed without using a bridge. The wires can be connected in series. Further, since the oblique portion of the fourth leg inserted in the specific slot and the oblique portion of the third leg separated by 5 slots in the circumferential direction can be configured to be located on the outermost side in the radial direction. , The tip of the fourth leg inserted into a specific slot and the tip of the third leg separated by 5 slots in the circumferential direction can be easily connected.

10 Stator 20 Stator core 201 1st end face 202 2nd end face 21 Teeth 22 Slot 2201 1st slot (1st slot)
2202 2nd slot (2nd slot)
2203 3rd slot (3rd slot)
2204 4th slot (4th slot)
2205 5th slot (5th slot)
2206 6th slot (6th slot)
2207 7th slot (1st slot)
2208 8th slot (2nd slot)
2209 9th slot (3rd slot)
2210 10th slot (4th slot)
2211 11th slot (5th slot)
2212 12th slot (6th slot)
2213 13th slot (1st slot)
2214 14th slot (2nd slot)
2215 15th slot (3rd slot)
2216 16th slot (4th slot)
2217 17th slot (5th slot)
2218 18th slot (6th slot)
2219 19th slot (1st slot)
2220 20th slot (2nd slot)
2221 21st slot (3rd slot)
2222 22nd slot (4th slot)
2223 23rd slot (5th slot)
2224 24th slot (6th slot)
2225 25th slot (1st slot)
2226 Slot 26 (2nd slot)
2227 27th slot (3rd slot)
2228 28th slot (4th slot)
2229 Slot 29 (slot 5)
2230 30th slot (6th slot)
2231 31st slot (1st slot)
2232 32nd slot (2nd slot)
2233 Slot 33 (slot 3)
2234 Slot 34 (Slot 4)
2235 35th slot (5th slot)
2236 Slot 36 (Slot 6)
2237 Slot 37 (1st slot)
2238 Slot 38 (2nd slot)
2239 Slot 39 (Slot 3)
2240 40th slot (4th slot)
2241 41st slot (5th slot)
2242 42nd slot (6th slot)
2243 Slot 43 (slot 1)
2244 44th slot (2nd slot)
2245 Slot 45 (Slot 3)
2246 Slot 46 (Slot 4)
2247 Slot 47 (slot 5)
2248 Slot 48 (slot 6)
30 Coil 31 Open side coil end 32 Closed side coil end 40 Segment conductor 41 Leg 41a 1st end 41b 2nd end 411 1st leg 412 2nd leg 413 3rd leg 414 4th leg 42 Curved part 43 Oblique part 44 Tip part 70 Neutral point U1, U2, V1, V2, W1, W2 Winding

Claims (6)

A substantially annular stator core having a plurality of teeth protruding inward in the radial direction at predetermined intervals along the circumferential direction and a plurality of slots that are spaces between the teeth adjacent to each other in the circumferential direction.
A coil composed of U-phase, V-phase, and W-phase windings formed by a plurality of segment conductors inserted into the plurality of slots.
Each said segment conductor
A pair of legs that extend parallel to each other, have a first end and a second end, are located inside the slot, and extend substantially linearly in the axial direction.
It is provided with a curved portion that connects the second ends of the pair of legs to each other, and has a substantially U-shape.
The first end portion of the pair of the leg portions protrudes outward from the first end surface in the axial direction of the stator core, and includes an oblique portion extending obliquely in the first direction or the second direction in the circumferential direction. A tip portion extending outward in the axial direction from the tip end of the skewed portion is formed.
The curved portion projects outward from the axial second end surface of the stator core.
The coil
An open-side coil end portion formed by the oblique portion and the tip portion of the segment conductor and projecting outward in the axial direction from the first end surface of the stator core.
It has a closed-side coil end portion formed by the curved portion of the segment conductor and projecting outward in the axial direction from the second end surface of the stator core.
In the plurality of slots, the legs of the plurality of segment conductors are inserted in a plurality of layers in a radial direction, and is a stator of a rotary electric machine.
The plurality of slots of the stator core are the first slot into which the segment conductor of the first phase of the U phase, V phase, and W phase is inserted, the segment conductor of the first phase and the U phase, V phase, and the like. The second slot into which the segment conductor of the second phase of the W phase is inserted, the third slot into which the segment conductor of the second phase is inserted, the segment conductor of the second phase and the U phase, V The fourth slot into which the segment conductor of the third phase of the phase and the W phase is inserted, the fifth slot into which the segment conductor of the third phase is inserted, and the segment conductor of the third phase. The sixth slot into which the segment conductor of the first phase is inserted is periodically arranged in this order in the circumferential direction.
A stator of a rotary electric machine in which at least a part of the legs of the segment conductor is connected to the legs of the segment conductor 5 slots apart in the circumferential direction by at least one of the curved portion and the tip portion. The stator of the rotary electric machine according to claim 1.
The winding of each phase has one end and the other end.
The one end of the winding of each phase is electrically connected to the leader.
The one end portion is a stator of a rotary electric machine, which is composed of the tip end portion of the leg portion arranged in the outermost layer in the radial direction of the predetermined slot. The stator of the rotary electric machine according to claim 1.
The stator core has 48 said slots.
In the slot, the legs of the segment conductor are inserted in four layers in a row in the radial direction.
The legs are the first leg portion arranged in the first layer from the inside in the radial direction, the second leg portion arranged in the second layer, the third leg portion arranged in the third layer, and the fourth layer. Has a fourth leg, which is placed in the eye,
The segment conductor is
The pair of legs are arranged by the curved portion at intervals of 6 slots in the circumferential direction.
The tip is connected to the tip of the leg of the segment conductor 5 slots apart in the circumferential direction.
The winding of each phase has one end and the other end.
The one end of the winding of each phase is electrically connected to the leader.
The other end of the winding of each phase is electrically connected to the neutral point.
The one end is composed of the tip of the fourth leg inserted into the predetermined slot.
The other end is a stator of a rotary electric machine, which is composed of the tip of the fourth leg inserted into a different predetermined slot. The stator of the rotary electric machine according to claim 1.
The stator core has 48 said slots.
In the slot, the legs of the segment conductor are inserted in four layers in a row in the radial direction.
The legs are the first leg portion arranged in the first layer from the inside in the radial direction, the second leg portion arranged in the second layer, the third leg portion arranged in the third layer, and the fourth layer. Has a fourth leg, which is placed in the eye,
The segment conductor is
The fourth legs separated by 6 slots in the circumferential direction are connected by the curved portion, and the first legs separated by 6 slots in the circumferential direction are connected by the curved portion, and 7 in the circumferential direction. The second leg portion and the third leg portion separated from each other by the slot are connected by the curved portion.
The tip is connected to the tip of the leg of the segment conductor 5 slots apart in the circumferential direction.
The winding of each phase has one end and the other end.
The one end of the winding of each phase is electrically connected to the leader.
The other end of the winding of each phase is electrically connected to the neutral point.
The one end is composed of the tip of the fourth leg inserted into the predetermined slot.
The other end is a stator of a rotary electric machine, which is composed of the tip of the fourth leg inserted into a different predetermined slot. The stator of the rotary electric machine according to claim 1.
The stator core has 48 said slots.
In the slot, the legs of the segment conductor are inserted in four layers in a row in the radial direction.
The legs are the first leg portion arranged in the first layer from the inside in the radial direction, the second leg portion arranged in the second layer, the third leg portion arranged in the third layer, and the fourth layer. Has a fourth leg, which is placed in the eye,
The segment conductor is
The fourth legs separated by 6 slots in the circumferential direction are connected by the curved portion, and the first legs separated by 6 slots in the circumferential direction are connected by the curved portion, and 5 in the circumferential direction. The second leg portion and the third leg portion separated from each other by the slot are connected by the curved portion.
The tip is electrically connected to the tip of the leg of the segment conductor 6 slots apart in the circumferential direction.
The winding of each phase has one end and the other end.
The one end of the winding of each phase is electrically connected to the leader.
The other end of the winding of each phase is electrically connected to the neutral point.
The one end is composed of the tip of the fourth leg inserted into the predetermined slot.
The other end is a stator of a rotary electric machine, which is composed of the tip of the fourth leg inserted into a different predetermined slot. The stator of the rotary electric machine according to claim 1.
The stator core has 48 said slots.
In the slot, the legs of the segment conductor are inserted in four layers in a row in the radial direction.
The legs are the first leg portion arranged in the first layer from the inside in the radial direction, the second leg portion arranged in the second layer, the third leg portion arranged in the third layer, and the fourth layer. Has a fourth leg, which is placed in the eye,
The segment conductor is
The fourth legs separated by 6 slots in the circumferential direction are connected by the curved portion, and the first legs separated by 6 slots in the circumferential direction are connected by the curved portion, and 5 in the circumferential direction. The second leg portion and the third leg portion 413 separated from each other by the slot are connected by the curved portion 42.
The tip of the fourth leg inserted into the specific slot is connected to the tip of the third leg separated by 5 slots in the circumferential direction.
The other tip is connected to the tip of the leg of the segment conductor 6 slots apart in the circumferential direction.
The winding of each phase has one end and the other end.
The one end of the winding of each phase is electrically connected to the leader.
The other end of the winding of each phase is electrically connected to the neutral point.
The one end is composed of the tip of the fourth leg inserted into the predetermined slot.
The other end is a stator of a rotary electric machine, which is composed of the tip of the fourth leg inserted into a different predetermined slot.

Images