JP2010068590A - Stator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stator in which coil conductors constituting each-phase coil can be directly connected to each other for an effective reduction in the coil end portion thereof. <P>SOLUTION: A stator core 2 is obtained by connecting one side stator core portion 2A to the other side stator core portion 2B with a connecting core portion 2C. The coils 3U, 3V, 3W of each phase are formed by bending a square wire conductor, and includes one side coil portion 3A in a nearly U-shape disposed in the slot 21 of the one side stator core portion 2A, and the other side coil portion 3B in a nearly U-shape disposed in the slot 21 of the other side stator core portion 2B. The coils 3U, 3V, 3W of each phase connect the connecting terminal portion 35A of the one side coil portion 3A to the connecting terminal portion 35B of the other side coil portion 3B, in the slot 21 of the connecting core portion 3C, to be formed into a wave-form respectively, encircling the circumference C of the stator core 2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a stator in which U-phase, V-phase, and W-phase coil conductors are disposed in a plurality of slots in a stator core in a distributed winding state.

In a stator used for a rotating electrical machine, in order to improve the assembly property, the occupation ratio in the slot of the conductor, etc., a rectangular conductor having a substantially rectangular cross section is used, and a U-phase formed in a wave shape, The three-phase coil conductors of V-phase and W-phase are each arranged in a distributed winding state in the slots of the stator core.
For example, in the AC rotating electrical machine disclosed in Patent Document 1, a belt-shaped winding band that circulates a stator core (stator) two or more times, a plurality of transition conductor parts that connect in-phase ends, and a winding band The stator coil is formed separately from the conductor wire and joined to the end portion of the winding band or has a same-layer crossing portion constituted by a part of the conductor wire of the winding band. . The winding band is composed of a plurality of conductor wires that are sequentially accommodated in slots that are separated from each other by a predetermined electrical angle and that are arranged in parallel.

  Further, in the above-described conventional stator, when joining the ends of the in-phase coil conductors (winding bands), they are joined using separately prepared crossover conductors. This is because it has been considered that the coil conductor is more easily manufactured by joining it with a crossover conductor than forming it in a wave winding shape having a necessary number of circulations that circulates around the stator core.

JP 2008-113539 A

  However, when the coil conductor is joined using the crossover conductor, the coil end portion that protrudes from the axial end surface of the stator core by the coil conductor and the crossover conductor becomes large, and the coil end portion is reduced in size. Not enough for that.

  The present invention has been made in view of such conventional problems, and provides a stator capable of directly connecting coil conductors constituting coils of each phase and effectively reducing the size of the coil end portion. It is something to try.

The present invention provides a stator in which three-phase coils of U phase, V phase and W phase are arranged in a distributed winding state in a plurality of slots formed along the axial direction of the stator core.
The stator core is formed by connecting a one-side stator core portion arranged on one side in the axial direction and a second stator core portion arranged on the other side in the axial direction by a connecting core portion arranged between the two stator core portions,
The coils of the respective phases are formed by bending a rectangular conductor and are arranged in a slot of the one-side stator core portion and are arranged in a slot of the one-side stator core portion, and a substantially U-shape arranged in the slot of the other-side stator core portion. The other end coil portion, and the joining end portion of the one side coil portion and the joining end portion of the other side coil portion are joined in the slot of the connecting core portion, The stator is characterized by being formed in a wave winding shape that makes a round in the direction (Claim 1).

The stator of the present invention uses three-phase coils each formed in a wave winding shape that makes a round in the circumferential direction of the stator core, and the three-phase coils are arranged on the stator core in a distributed winding state.
Then, when the wave-shaped coil conductors forming the coils of each phase are arranged by circulating around the stator core a plurality of times, by directly connecting the coil conductors, a part of the coils of each phase can be obtained. A device for reducing the size of the coil end portion protruding from the axial end surface of the stator core has been devised.

In the stator of the present invention, the three-phase coil and the stator core are divided into two in the axial direction of the stator core, and are joined at an intermediate position in the axial direction of the stator core.
Specifically, each phase coil is configured by joining a substantially U-shaped one side coil portion and a substantially U-shaped other side coil portion. And the coil of each phase arrange | positions the one side coil part in the one side stator core part, and arrange | positions the other side coil part in the other side stator core part, and the end part for joining in the one side coil part, and the other side coil part It joins in the state which faced the end part for joining. In addition, a space for joining the joining end portions is formed between the stator core portions. In this space, the connecting core portion is arranged, the joining portion of the joining end portion is arranged in the slot of the connecting core portion, and the one side stator core portion and the other side stator core portion are connected by the connecting core portion. ing.

  As a result, the coil of each phase of the present invention can be connected to the stator core multiple times in the circumferential direction of the stator core by directly connecting the coiled coil conductors forming the coils of each phase without using a separate conductor such as a crossover conductor. It can be formed in a circulating state. And in each phase coil, the separate conductor for connecting coil conductors becomes unnecessary, and a coil end part can be reduced in size effectively by eliminating the space for connecting a separate conductor.

Moreover, since each stator core part is connected by the connection core part, when the stator is assembled to a rotating electric machine such as a motor, the magnetic circuit formed through the stator core is not adversely affected. . Therefore, the performance of the rotating electrical machine formed by assembling the stator can be maintained high.
Therefore, according to the stator of the present invention, the coil conductors constituting the coils of the respective phases can be directly connected, and the coil end portion can be effectively downsized.

A preferred embodiment of the above-described stator of the present invention will be described.
In the present invention, the stator can be used for a motor, a generator, and a motor generator as a rotating electric machine.
The rectangular conductors constituting the three-phase coil may be electric wires such as a flat wire having a substantially square cross section or a flat wire having a flat cross section. Moreover, a square wire conductor can be comprised from the electric wire which formed the insulating film which consists of insulating resin etc. in the perimeter of the conductor part which consists of copper.

Further, the connecting core portion is composed of a plurality of divided cores divided in the circumferential direction at the formation positions of both side slots adjacent to both sides in the circumferential direction of the center side slot which is one of the plurality of slots, The stator core is preferably formed by fitting the plurality of divided cores between the one-side stator core portion and the other-side stator core portion from the outer peripheral side of the joining end portions joined to each other ( Claim 2).
In this case, after joining the joining end portion in the one side coil portion and the joining end portion in the other side coil portion, the split core is easily arranged from the outer peripheral side of the joining portion between the joining end portions. can do. Therefore, the connection core part for connecting each stator core part can be arrange | positioned easily, and the assembly | attachment property of a stator can be improved.

The coils of each phase are formed by overlapping a plurality of coil conductors in the radial direction in the slot, and at least the joining end portions of the coil conductors adjacent to each other among the plurality of coil conductors. Are preferably displaced from each other in the axial direction (claim 3).
In this case, the joining position of the joining ends of the coil conductor can be opposed to the outer peripheral surface on which the insulating coating of the other coil conductor is formed. Therefore, the joining position between the joining end portions can be prevented from being opposed to the joining position between the other joining end portions, and insulation at the joining position can be easily ensured.

The plurality of slots are repeatedly formed in the order of two U-phase slots adjacent to each other, two V-phase slots adjacent to each other, and two W-phase slots adjacent to each other. Are arranged in a plurality of stages in the radial direction of the stator core, with two sets of coil conductors arranged in the in-phase slot group that is adjacent to the in-phase slot in two rounds in the circumferential direction of the stator core. The two sets of coil conductors are formed by arranging coil end conductor portions arranged outside the axial end face of the stator core side by side in the axial direction of the stator core. One set of two outer peripheral coil conductors located on the radially outer peripheral side of the stator core, and one set of two inner peripheral coil conductors overlapping the inner peripheral side thereof The crossover coil end conductor portion for connecting the one of the coil conductors definitive, it is preferable to provide overlapping radially (claim 4).
In this case, all the transition coil end portions can be arranged together at a specific location in the circumferential direction of the stator core by providing the transition coil end conductor portions so as to overlap in the radial direction. Therefore, the complication of the coil conductor due to the transition coil end conductor can be eliminated, and the coil end can be formed compactly.

Further, the transition coil end conductor portion of the two sets of coil conductors includes two slots in the first in-phase slot set and a second adjacent in the circumferential direction to the first in-phase slot set. The two outer peripheral coil conductors are set as one coil conductor (T1) and the other coil conductor (T2). When the inner peripheral coil conductor is one coil conductor (T3) and the other coil conductor (T4), the one coil conductor (T1) is the above-mentioned one on the circumferential inner side in the first in-phase slot set. A first rising conductor portion (P2) rising from the slot, and a second rising conductor portion rising from the circumferentially inner slot in the second in-phase slot set, the one coil conductor (T3). P3) is connected by the transition coil end conductor portion, and is the other coil conductor (T4) that rises from the outer circumferential slot in the first in-phase slot group ( P14) and the fourth rising conductor portion (P15), which is the other coil conductor (T2) and rises from the circumferentially outer slot in the second in-phase slot set, the transition coil end conductor portion It is preferable that the coil conductors in the plurality of stages of two sets of coil conductors are directly and continuously connected only by the transition coil end conductor portion and the rising conductor portion. Item 5).
In this case, the coil conductors can be more compactly connected by the transition coil end portion. Therefore, the coil end portion can be more effectively downsized.

Further, the transition coil end conductor portion of the two sets of coil conductors includes two slots in the first in-phase slot set and a second adjacent in the circumferential direction to the first in-phase slot set. The two outer peripheral coil conductors are set as one coil conductor (T1) and the other coil conductor (T2). When the inner peripheral coil conductor is one coil conductor (T3) and the other coil conductor (T4), the one coil conductor (T1) is the above-mentioned one on the circumferential inner side in the first in-phase slot set. A first rising conductor portion (P2) rising from the slot and the second coil conductor (T2), the second rising conductor portion rising from the circumferentially outer slot in the second in-phase slot set P3) is connected by the transition coil end conductor portion, and the third coil conductor portion (T2) is a third rising conductor portion (T2) that rises from the circumferentially outer slot in the first in-phase slot set ( P4) and the fourth rising conductor portion (P5), which is the one coil conductor (T3) and rises from the circumferentially inner slot in the second in-phase slot set, the transition coil end conductor portion The coil conductors in the plurality of stages of the two sets of coil conductors can be directly and continuously connected only by the transition coil end conductor portion and the rising conductor portion. Item 6).
Also in this case, the coil conductors can be more compactly connected by the transition coil end portion. Therefore, the coil end portion can be more effectively downsized.

Further, on the one axial side and the other side of the stator core, the V-phase coil end conductor portion is bent at the central portion in the circumferential direction, and is located on one circumferential side and on the radially outer circumferential side. It is formed in a shape having a V-phase outer peripheral conductor portion and a V-phase inner peripheral conductor portion located on the other circumferential side and on the radially inner periphery side, and the U-phase coil end conductor portion is The one conductor portion in the circumferential direction is overlapped with the outer circumference side of the conductor portion on the V-phase inner circumference side, and the other conductor portion in the circumferential direction is adjacent to the other circumferential side of the conductor portion in the V-phase inner circumference side. The W-phase coil end conductor portion is disposed so as to overlap the outer circumferential side of the circumferential one side conductor portion, and the W-phase coil end conductor portion is disposed on the other circumferential side of the V-phase outer side conductor portion. Overlay on the inner circumference side of the conductor part, The direction one side conductor portion is disposed so as to overlap the inner circumference side of the circumferential direction other side conductor portion of the coil end conductor portion of the U phase adjacent to the circumferential direction one side of the V phase outer circumference side conductor portion. Preferred (claim 7).
In this case, a set of two coil conductors constituting a three-phase coil can be alternately arranged within the range of the radial width of approximately two coil end conductor portions. The coil end portion formed from the coil end conductor portion can be downsized in the radial direction.

Embodiments of the stator according to the present invention will be described below with reference to the drawings.
Example 1
As shown in FIGS. 1 and 2, the stator 1 of this example includes a three-phase coil of U phase, V phase, and W phase in a plurality of slots 21 formed along the axial direction L of the stator core 2 in a distributed winding state. 3U, 3V, 3W are arranged.
The stator core 2 includes a connecting core portion 2C in which a one-side stator core portion 2A disposed on the one axial side L1 and a second stator core portion 2B disposed on the other axial side L2 are disposed between the stator core portions 2A and 2B. It is connected by.

  As shown in FIGS. 3 and 4, the coils 3U, 3V, and 3W of the respective phases are formed by bending the rectangular conductor 301 and arranged in the slot 21 of the one-side stator core portion 2A. The coil portion 3A and the other-side coil portion 3B having a substantially U shape disposed in the slot 21 of the other-side stator core portion 2B. As shown in FIG. 5, the coils 3U, 3V, and 3W of the respective phases are connected to the joining end portion 35A of the one side coil portion 3A and the joining end portion 35B of the other side coil portion 3B in the slot 21 of the connecting core portion 3C. To form a wave winding shape that makes a round in the circumferential direction C of the stator core 2.

Hereinafter, the stator 1 of this example will be described in detail with reference to FIGS.
The stator 1 of this example is used for a three-phase AC motor such as a hybrid car or an electric vehicle.
As shown in FIG. 2, the rectangular conductors 301 constituting the three-phase coils 3U, 3V, and 3W of this example are each formed of a rectangular wire (electric wire) having a substantially square cross section. The rectangular conductor 301 is an electric wire in which an insulating film made of an insulating resin is formed on the entire circumference of a conductor portion made of copper.

  As shown in FIGS. 1 and 2, the coils 3U, 3V, and 3W of the respective phases are formed by bending the rectangular conductor 301 so that the slot conductor portions 31 disposed in the slots 21U, 21V, and 21W of the respective phases; A coil end conductor portion 32 disposed along the circumferential direction C of the stator core 2 outside the axial end surface 201 of the stator core 2 and a standing conductor rising from the axial end surface 201 of the stator core 2 continuously from the slot conductor portion 31. The coil end conductor portion 32 is connected to the axial side one side L1 and the other side L2 of the slot conductor portion 31 alternately through the upright conductor portion 33 a plurality of times, and the stator core 2 is connected in the circumferential direction C. Each of them is formed in a wave winding shape that makes a round.

As shown in FIG. 2, the plurality of slots 21 in the stator core 2 include two U-phase slots 21U adjacent to each other in which the slot conductor portions 31U in the U-phase coil 3U are arranged, and the slot conductor portions 31V in the V-phase coil 3V. The two adjacent V-phase slots 21V and the two adjacent W-phase slots 21W in which the slot conductor portions 31W of the W-phase coil 3W are arranged are repeatedly formed in the circumferential direction C in this order. .
Before the slot conductor portions 31 of the coils 3U, 3V, 3W of the respective phases are arranged in the slots 21U, 21V, 21W of the respective phases, the slot insulating paper 51 is provided in the slots 21U, 21V, 21W of the respective phases. Can be placed.

As shown in FIG. 6, the connecting core portion 2C of the present example is arranged in the circumferential direction C at the formation position of both side slots 21Y adjacent to both sides in the circumferential direction C of the center side slot 21X which is one of the plurality of slots 21. The plurality of divided cores 25 are divided and divided into half the total number of slots 21 in the stator core 2. Each divided core 25 has a pair of teeth 22 forming a center slot 21X, and forms one center slot 21X and a pair of both side slots 21Y formed in a groove shape divided in half. Become.
As shown in FIGS. 1 and 5, the stator core 2 is for joining a plurality of divided cores 25 by joining the one side coil portion 3 </ b> A and the other side coil portion 3 </ b> B in each phase coil 3 </ b> U, 3 </ b> V, 3 </ b> W. From the outer peripheral side with respect to the end portions 35A and 35B, the first stator core portion 2A and the other stator core portion 2B are fitted and formed.

  3, 4, and 6, the facing portion 202 in the axial direction L where each divided core 25 and the one side stator core portion 2 </ b> A face each other, and each divided core 25 and the other side stator core portion 2 </ b> B face each other. The facing portion 203 in the axial direction L can be formed with a protrusion for positioning these and a recess engaging with the protrusion.

As shown in FIG. 2, a plurality of the slot conductor portions 31 of the coils 3U, 3V, and 3W of each phase are arranged in the radial direction R of the slots 21U, 21V, and 21W of each phase. As shown in FIG. 7, the joining positions of the joining end portions 35 </ b> A and 35 </ b> B in the plurality of slot conductor portions 31 can be formed to be shifted from each other in the axial direction L. Thereby, the joining positions of the joining end portions 35 </ b> A and 35 </ b> B of the slot conductor portion 31 can be opposed to the outer peripheral surface of the other slot conductor portion 31 on which the insulating film is formed. Therefore, the joining position between the joining end portions 35A and 35B can be prevented from facing the joining position between the other joining end portions 35A and 35B, and insulation at the joining position can be easily ensured. .
In addition, in order to insulate with the tooth | gear 22, the joining part of 35 A and 35B for joining of the slot conductor part 31 located in the innermost peripheral side of the radial direction R in the slot 21 is powder coating, resin coating Partial insulation can be performed by a coating method such as.

  Moreover, the shape of the front end surface of joining end part 35A, 35B can be formed as an inclined surface which inclines in the axial direction L of the stator core 2, as shown in FIG. At this time, the inclined surfaces of the joining end portions 35 </ b> A and 35 </ b> B can be formed to be inclined toward the circumferential direction R of the stator core 2. In addition to this, for example, it may be formed as a right-angled surface orthogonal to the axial direction L of the stator core 2, a stepped surface, or the like.

  As shown in FIGS. 8 and 9, the coils 3U, 3V, and 3W of each phase are formed by connecting a plurality of (eight in this example) wave-shaped coil conductors 4A and 4B that make a circuit in the circumferential direction C of the stator core 2. It is formed. Sixteen slots 21 are formed in the stator core 2 of this example, and a total of 48 slots 21 are formed. The U-shaped one side coil portion 3 </ b> A and the other side coil portion 3 </ b> B are formed at four locations in the circumferential direction C of the stator core 2, respectively. 8 schematically illustrates the U-phase coil 3U (the same applies to the V-phase and W-phase coils 3V and 3W), and FIG. 9 constitutes the W-phase coil 3W. For this reason, only one side coil portion 3A for this purpose is disposed on one side stator core portion 2A (the same applies to U-phase and V-phase coils 3U and 3V).

As shown in FIGS. 1 and 9, the coils 3U, 3V, and 3W of each phase include a plurality of coil conductors 4A and 4B that circulate in the circumferential direction C of the stator core 2 in the radial direction R of the stator core 2. It is arranged in layers. The two sets of coil conductors 4 </ b> A and 4 </ b> B are configured such that the slot conductor portions 31 are arranged in the adjacent in-phase slots 21 and the coil end conductor portions 32 are arranged in the axial direction L of the stator core 2.
As shown in FIG. 8, one coil conductor 4A of the set of two coil conductors 4A and 4B forms an inner U-shape in the one-side stator core portion 2A, and the outer U-shape in the other-side stator core portion 2B. A letter shape is formed. On the other hand, the other coil conductor 4B of the set of two coil conductors 4A and 4B forms an outer U-shape in the one-side stator core portion 2A, and an inner U-shape in the other-side stator core portion 2B. A letter shape is formed.

As shown in FIG. 2, the slots 21U, 21V, and 21W of each phase of this example are formed in a shape in which four slot conductor portions 31 are arranged in the radial direction R. The slots 21U, 21V, and 21W of each phase are parallel slots formed by forming a pair of radial wall surfaces that are parallel to each other.
In each of the coil conductors 4A and 4B, the rising conductor portion 33 and the coil end conductor portion 32 are flattened in the radial direction R (thickness in the radial direction R is smaller) than the slot conductor portion 31 disposed in the slot 21. Is formed.
As shown in FIG. 8, in the stator 1, the coils 3U, 3V, and 3W of each phase are formed by arranging four sets of two coil conductors 4A and 4B in the circumferential direction C of the stator core 2. It is formed with 8 rounds (8 turns).

  As shown in FIGS. 8 and 9, in each phase coil 3 </ b> U, 3 </ b> V, 3 </ b> W, a set of two coil conductors 4 </ b> A, 4 </ b> B stacked in a plurality of stages (four stages in this example) Any one of the two outer coil conductors 4A, 4B located on the side R1 and one of the two inner coil conductors 4A, 4B overlapping the inner circumference thereof, Is one of the plurality of coil end conductor portions 32 arranged in a plurality of locations in the circumferential direction C of the stator core 2 and is located on the one side L1 in the axial direction of the stator core 2. It is connected at the portion 32Z.

As shown in FIGS. 10 and 11, when two in-phase slots 21 adjacent to each other are set to in-phase slot sets S1 and S2, the transition coil end conductor portion 32Z in the two sets of coil conductors 4A and 4B is Crossing two slots 21A and 21B in one in-phase slot set S1 and two slots 21A and 21B in a second in-phase slot set S2 adjacent to the first in-phase slot set S1 in the circumferential direction C .
Further, the transition coil end conductor portions 32 </ b> Z are collectively arranged in a state where they overlap in the radial direction R at specific locations in the circumferential direction C of the stator core 2.

  As shown in the figure, the transition coil end conductor portion 32Z in one of the two coil conductors 4A, 4B rises from the circumferentially inner slot 21A in the first in-phase slot group S1. The conductor 33 is connected to the rising conductor 33 that rises from the inner circumferential slot 21A in the second in-phase slot set S2. The transition coil end conductor portion 32Z in the other coil conductor 4B of the two sets of coil conductors 4A and 4B has a rising conductor portion 33 rising from the circumferentially outer slot 21B in the first in-phase slot set S1, and The rising conductor portion 33 rising from the outer circumferential slot 21B in the two in-phase slot sets S2 is coupled. One coil conductor 4A and the other coil conductor 4B in a set of coil conductors 4A and 4B in a plurality of stages (four stages) are continuous only by the transition coil end conductor part 32Z and the rising conductor part 33. Are directly connected.

  More specifically, as shown in FIGS. 10 and 11, the transition coil end conductor portion 32Z of the present example is formed from the radially outer peripheral side R1 before the one side coil portion 3A forming the inner U-shape. The wave-shaped coil conductors 4A and 4B are sequentially connected toward the inner peripheral side R2, and then the one side coil portion 3A forming the outer U-shape is directed from the radial inner peripheral side R2 toward the outer peripheral side R1. The wave-shaped coil conductors 4A and 4B are sequentially connected.

  In each slot 21, four slot conductor portions 31 are arranged in the radial direction R, and each slot 21 in this example is a first outer peripheral position where the outermost slot conductor portion 31 is disposed. A1, the second outer peripheral position A2 adjacent to the inner peripheral side of the first outer peripheral position A1, the third outer peripheral position A3 adjacent to the inner peripheral side of the second outer peripheral position A2, and the third outer peripheral position A3. The region is divided into four regions at the fourth outer peripheral side position A4 adjacent to the inner peripheral side. Further, as shown in FIG. 8, the two sets of coil conductors 4A and 4B are arranged in order from the radially outer peripheral side R1 of the stator core 2 to the first outer peripheral coil conductor set B1, the second outer peripheral coil conductor set B2, They are formed as a third outer peripheral side coil conductor set B3 and a fourth outer peripheral side coil conductor set B4.

FIG. 11 is a schematic explanatory view showing the transition coil end conductor portion 32 </ b> Z as viewed from one axial side L <b> 1 of the stator core 2. For convenience, the transition coil end conductor portion 32Z is linearly developed, and the position of the transition coil end conductor portion 32Z in the radial direction R is different from the actual position.
Hereinafter, the winding state of each of the coil conductors 4A and 4B will be described with reference to FIGS. 8 and 11, focusing on the state of formation of the transition coil end conductor portion 32Z. In both figures, the numbers surrounded by circles mean that the coil conductors 4 are continuously connected by the same numbers.

In the following description, the first outer peripheral side coil conductor set B1 includes a coil conductor of a first turn T1 and a coil conductor of a second turn T2, and the second outer peripheral side coil conductor set B2 is a coil conductor of a third turn T3. And the third outer coil conductor set B3 includes a coil conductor of the fifth turn T5 and a coil conductor of the sixth turn T6, and the fourth outer coil conductor set B4 includes the coil conductor of the fourth turn T4. It consists of a 7-turn T7 coil conductor and an 8th turn T8 coil conductor.
In addition, positions P1 to P16 indicate positions in the slots 21 where the rising conductor portions 33 rise from the slots 21.

As shown in FIGS. 8 and 11, the coil conductor (T1) of the first turn, the rising conductor part (P2) rising from the circumferential inner slot 21A in the first in-phase slot set S1, and the third turn The rising conductor portion (P3) that is the coil conductor (T3) and rises from the circumferentially inner slot 21A in the second in-phase slot set S2 is defined by the transition coil end conductor portion 32Z (symbol a in FIG. 11). It is connected.
A third-turn coil conductor (T3) that rises from a circumferentially inner slot 21A in the first in-phase slot set S1, and a fifth-turn coil conductor (T5) The rising conductor portion (P5) rising from the circumferentially inner slot 21A in the two in-phase slot sets S2 is connected by a transition coil end conductor portion 32Z (symbol b in FIG. 11).

A fifth-turn coil conductor (T5), a rising conductor portion (P6) rising from a circumferentially inner slot 21A in the first in-phase slot set S1, and a seventh-turn coil conductor (T7) The rising conductor portion (P7) rising from the circumferentially inner slot 21A in the two in-phase slot sets S2 is connected by a transition coil end conductor portion 32Z (symbol c in FIG. 11).
A seventh-turn coil conductor (T7) that rises from a circumferentially inner slot 21A in the first in-phase slot set S1, and an eighth-turn coil conductor (T8) The rising conductor portion (P9) rising from the circumferentially inner slot 21A in the two in-phase slot sets S2 is connected by a transition coil end conductor portion 32Z (symbol d in FIG. 11).

As shown in FIGS. 8 and 11, the coil conductor (T8) of the eighth turn, the rising conductor portion (P10) rising from the circumferentially outer slot 21B in the first in-phase slot set S1, and the sixth turn The rising conductor portion (P11) that is the coil conductor (T6) and rises from the circumferentially outer slot 21B in the second in-phase slot set S2 is defined by the transition coil end conductor portion 32Z (symbol e in FIG. 11). It is connected.
A sixth-turn coil conductor (T6) that rises from a circumferentially outer slot 21B in the first in-phase slot set S1, and a fourth-turn coil conductor (T4) The rising conductor portion (P13) rising from the outer circumferential slot 21B in the two in-phase slot sets S2 is connected by a transition coil end conductor portion 32Z (symbol f in FIG. 11).

  A coil conductor (T4) of the fourth turn and a rising conductor portion (P14) rising from the circumferentially outer slot 21B in the first in-phase slot set S1, and a coil conductor (T2) of the second turn The rising conductor portion (P15) rising from the outer circumferential slot 21B in the two in-phase slot sets S2 is connected by a transition coil end conductor portion 32Z (symbol g in FIG. 11).

  The coil conductor of the first turn T1 (one coil conductor 4A in the first outer peripheral side coil conductor set B1) is a slot on the inner side in the circumferential direction in the second in-phase slot set S2 from one lead conductor end portion 36. After entering the first outer peripheral side position A1 (first position) P1 of 21A from the one axial side L1, and then turning around the one circumferential side C1, the circumferential inner slot 21A of the first in-phase slot set S1 The first outer peripheral side position A1 (second position) P2 enters from the other axial side L2, and then, as the transition coil end conductor portion 32Z (symbol a in FIG. 11), on the axial one side L1 of the stator core 2, The second position P2 extends to the second outer peripheral side position A2 (third position) P3 of the slot 21A on the inner side in the circumferential direction in the second in-phase slot set S2.

  The coil conductor of the second turn T2 (one coil conductor 4A in the second outer peripheral side coil conductor set B2) enters the third position P3 from the one side L1 in the axial direction and then turns around one side C1 in the circumferential direction. Thereafter, the second outer peripheral side position A2 (fourth position) P4 of the slot 21A on the circumferential inner side in the first in-phase slot set S1 enters from the other side L2 in the axial direction, and then the transition coil end conductor portion 32Z (FIG. 11). As a symbol b), the third outer peripheral side position A3 (fifth position) P5 of the slot 21A in the circumferential direction in the second in-phase slot set S2 from the fourth position P4 on the one axial side L1 of the stator core 2 is shown. It has crossed over to.

  The coil conductor of the third turn T3 (one coil conductor 4A in the third outer periphery side coil conductor set B3) enters the fifth position P5 from the one axial side L1, and then turns around the one circumferential side C1. Thereafter, the third outer peripheral side position A3 (sixth position) P6 of the slot 21A on the circumferential inner side in the first in-phase slot set S1 enters from the other side L2 in the axial direction, and then the transition coil end conductor portion 32Z (FIG. 11). As a symbol c), the fourth outer peripheral position A4 (seventh position) P7 of the slot 21A on the inner circumferential side in the second in-phase slot set S2 from the sixth position P6 on the one axial side L1 of the stator core 2 is shown. It has crossed over to.

  The coil conductor of the fourth turn T4 (one coil conductor 4A of the fourth outer periphery side coil conductor set B4) enters the seventh position P7 from the one side L1 in the axial direction, and then turns around the one side C1 in the circumferential direction. After that, it enters the fourth outer peripheral side position A4 (eighth position) P8 of the circumferentially inner slot 21A in the first in-phase slot set S1 from the other side L2 in the axial direction, and then the transition coil end conductor portion 32Z (FIG. 11). As the symbol d), the fourth outer peripheral position A4 (the ninth position) P9 of the slot 21B on the outer circumferential side in the second in-phase slot set S2 from the eighth position P8 on the one axial side L1 of the stator core 2 is shown. It has crossed over to.

  The coil conductor of the fifth turn T5 (the other coil conductor 4B of the fourth outer periphery side coil conductor set B4) enters the ninth position P9 from the one side L1 in the axial direction, and then turns around the one side C1 in the circumferential direction. After that, it enters the fourth outer peripheral side position A4 (tenth position) P10 of the outer circumferential slot 21B in the first in-phase slot set S1 from the other side L2 in the axial direction, and then the transition coil end conductor portion 32Z (FIG. 11). As an inner symbol e), on the one axial side L1 of the stator core 2, from the tenth position P10 to the third outer peripheral side position A3 (11th position) P11 of the slot 21B on the outer circumferential side in the second in-phase slot set S2. It has crossed over to.

  The coil conductor of the sixth turn T6 (the other coil conductor 4B in the third outer periphery side coil conductor set B3) enters the eleventh position P11 from the one side L1 in the axial direction, and then turns around one side C1 in the circumferential direction. Then, the third outer peripheral side position A3 (the twelfth position) P12 of the outer circumferential slot 21B in the first in-phase slot set S1 enters from the other side L2 in the axial direction, and then the transition coil end conductor portion 32Z (FIG. 11). As an inner symbol f), on the one axial side L1 of the stator core 2, from the twelfth position P12 to the second outer peripheral side position A2 (13th position) P13 of the slot 21B on the outer circumferential side in the second in-phase slot set S2. It has crossed over to.

  The coil conductor of the seventh turn T7 (the other coil conductor 4B in the second outer peripheral side coil conductor set B2) enters the thirteenth position P13 from the one side L1 in the axial direction, and then turns around one side C1 in the circumferential direction. Thereafter, the second outer peripheral side position A2 (14th position) P14 of the outer circumferential slot 21B in the first in-phase slot set S1 enters from the other side L2 in the axial direction, and then the transition coil end conductor portion 32Z (FIG. 11). As an inner symbol g), on the one axial side L1 of the stator core 2, from the 14th position P14, the first outer circumferential side position A1 (15th position) P15 of the circumferentially outer slot 21B in the second in-phase slot set S2. It has crossed over to.

  The coil conductor of the eighth turn T8 (the other coil conductor 4B in the first outer peripheral side coil conductor set B1) enters the fifteenth position P15 from the one side L1 in the axial direction, and then turns around one side C1 in the circumferential direction. Thereafter, the first outer-phase slot 21B in the first in-phase slot group S1 enters the first outer peripheral position A1 (16th position) P16 of the slot 21B from the other side L2 in the axial direction, and then, as the other lead conductor end 37, In the axial direction one side L1 of the stator core 2, it is pulled out from the 16th position P16.

  Thus, in the stator 1 of this example, by adopting a configuration in which the stator core 2 and the three-phase coils 3U, 3V, and 3W are divided and assembled into one side L1 and the other side L2, each turn The coil conductors 4A and 4B can be continuously connected without using a separate conductor such as a crossover conductor. In addition, in FIG. 12, the formation state of the coil end conductor part 32Z for a transition mentioned above is shown.

Further, as shown in FIG. 5, in the coil end portions 30 on the one side L1 and the other side L2 in the axial direction of the stator core 2, the V-phase coil end conductor portion 32V is bent at the center portion in the circumferential direction R, A V-phase outer circumferential conductor portion 321V located on one circumferential side C1 and located on the radially outer circumferential side R1, and a V-phase inner circumferential conductor located on the other circumferential side C2 and located on the radially inner circumferential side R2. A shape having a portion 322V is formed.
In addition, the U-phase coil end conductor portion 32U overlaps the outer circumferential side of the V-phase inner circumferential side conductor portion 322V with the circumferential one side conductor portion 321U and the circumferential other side conductor portion 322U within the V-phase. The W-phase coil end conductor portion 32 adjacent to the other circumferential side C2 of the circumferential conductor portion 322V is disposed so as to overlap the outer circumferential side of the circumferential one side conductor portion 321W.

The W-phase coil end conductor portion 32W overlaps the other circumferential conductor portion 322W on the inner circumferential side of the V-phase outer circumferential conductor portion 321V, and the circumferential one-side conductor portion 321W extends to the V-phase outer circumferential portion. The U-phase coil end conductor portion 32U adjacent to the circumferential side one side C1 of the side conductor portion 321V is disposed so as to overlap the inner circumferential side of the circumferential side other side conductor portion 322W.
Thus, two sets of coil conductors 4A and 4B constituting the three-phase coils 3U, 3V and 3W are alternately arranged within the range of the width in the radial direction R corresponding to the two coil end conductor portions 32. The coil end portion 30 formed from the three-phase coil end conductor portions 32 can be downsized in the radial direction R.

The stator 1 of this example uses three-phase coils 3U, 3V, and 3W formed in a wave shape that makes a round in the circumferential direction C of the stator core 2, and uses three-phase coils 3U, 3V, and 3W in a distributed winding state. 2 is arranged.
When the wave-shaped coil conductors 4A and 4B forming the coils 3U, 3V and 3W of the respective phases are arranged in a plurality of times in the circumferential direction C of the stator core 2, the coil conductors 4A and 4B are directly connected to each other. By connecting, the device for reducing the size of the coil end portion 30 formed by the rising conductor portion 33 and the coil end conductor portion 32 protruding from the axial end surface 201 of the stator core 2 is performed.

Specifically, in the stator 1 of this example, the three-phase coils 3U, 3V, 3W and the stator core 2 are divided into two in the axial direction L of the stator core 2, and joined at an intermediate position in the axial direction L of the stator core 2. is doing.
That is, as shown in FIGS. 3 and 4, the coils 3U, 3V, and 3W of each phase include a U-shaped one-side coil portion 3A that is located on the one axial side L1 and a U that is located on the other axial side L2. It is configured by joining a letter-shaped other side coil portion 3B. Each of the coil portions 3A and 3B couples the portion on the one side L1 or the other side L2 in the axial direction of the pair of slot conductor portions 31, the pair of rising conductor portions 33 connected thereto, and the pair of rising conductor portions 33. The coil end conductor portion 32 forms a U shape.

  As shown in FIGS. 5 and 13, the coils 3U, 3V, and 3W of the respective phases have the one side coil portion 3A disposed in the one side stator core portion 2A and the other side coil portion 3B disposed in the other side stator core portion 2B. Then, a joining end portion 35A of one side portion in the slot conductor portion 31 constituting the one side coil portion 3A and a joining end portion 35B of the other side portion in the slot conductor portion 31 constituting the other side coil portion 3B are provided. It can join in the state of butting. The joining end portions 35A and 35B can be joined by various joining methods such as brazing. In addition, a space 20 for joining the joining end portions 35A and 35B is formed between the stator core portions 2A and 2B. Therefore, using this space 20, the joining end portions 35A and 35B can be easily joined together.

  After joining the joining end portions 35A and 35B, a plurality of divided cores 25 are arranged in the space 20 (see FIG. 6). At this time, each divided core 25 can be fitted between the one-side stator core portion 2A and the other-side stator core portion 2B from the outer peripheral side with respect to the joint portion between the joining end portions 35A and 35B. Each divided core 25 is formed with a slot 21 (21X, 21Y) connected to the slot 21 in each stator core portion 2A, 2B, and the joined portions of the joining end portions 35A, 35B joined together are divided core 25. It can be placed in the slot 21 of this. Further, the slot insulating paper 51 can be arranged in advance in the slot 21 of each divided core 25.

  As shown in FIG. 1, when the connecting core portion 2C is formed by all the divided cores 25, the one-side stator core portion 2A and the other-side stator core portion 2B are all connected in the circumferential direction C of the stator core 2 by the connecting core portion 2C. It can be connected in the circumference. This connection is performed by applying a load to the connecting core part 2C from both sides in the axial direction L between the one side stator core part 2A and the other side stator core part 2B, thereby eliminating gaps between the core parts 2A, 2B, 2C. Can do.

  Thereby, the coil 3U, 3V, 3W of each phase of this example does not use separate conductors, such as a crossover conductor, but the wave-like coil conductors 4A, 4B that form the coils 3U, 3V, 3W of each phase. Can be formed in a state where they are circulated a plurality of times (eight times in this example) in the circumferential direction C of the stator core 2. In each phase of the coils 3U, 3V, and 3W, a separate conductor for connecting the coil end conductor portion 32 or the upright conductor portion 33 is not necessary, and a space for connecting the separate conductors is eliminated. The coil end portion 30 positioned on the one side L1 in the axial direction by the upper conductor portion 33 and the coil end conductor portion 32 can be effectively downsized.

In addition, the stator core portions 2A and 2B are connected to each other by a connecting core portion 2C, so that when the stator 1 is assembled and used in a rotating electrical machine such as a motor, a magnetic circuit formed through the stator core 2 is used. There is no adverse effect. Therefore, the performance of the rotating electrical machine formed by assembling the stator 1 can be maintained high.
Therefore, according to the stator 1 of this example, the coil conductors constituting the coils 3U, 3V, and 3W of the respective phases can be directly connected, and the coil end portion 30 can be effectively downsized.

(Example 2)
This example is an example in which the formation state of the transition coil end conductor portion 32Z described in the first embodiment is changed.
As shown in FIGS. 14 to 16, the transition coil end conductor portion 32Z in one coil conductor 4A of the pair of coil conductors 4A and 4B of the present example is arranged on the inner side in the circumferential direction in the first in-phase slot set S1. The rising conductor portion 33 rising from the slot 21A is connected to the rising conductor portion 33 rising from the outer circumferential slot 21B in the second in-phase slot set S2. Further, the transition coil end conductor portion 32Z in the other coil conductor 4B of the pair of coil conductors 4A and 4B has a rising conductor portion 33 that rises from the circumferentially outer slot 21B in the first in-phase slot set S1. The rising conductor portion 33 rising from the circumferentially inner slot 21A in the second in-phase slot set S2 is coupled. The coil conductors in the two sets of coil conductors 4A and 4B in a plurality of stages (four stages) are continuously and directly connected only by the transition coil end conductor part 32Z and the rising conductor part 33.

FIG. 16 is a schematic explanatory view showing the transition coil end conductor portion 32 </ b> Z as viewed from one axial side L <b> 1 of the stator core 2. For convenience, the transition coil end conductor portion 32Z is linearly developed, and the position of the transition coil end conductor portion 32Z in the radial direction R is different from the actual position.
Hereinafter, the winding state of each of the coil conductors 4A and 4B will be described with reference to FIGS. 14 and 16, focusing on the state of formation of the transition coil end conductor portion 32Z. In both figures, the numbers surrounded by circles mean that the coil conductors 4 are continuously connected by the same numbers.

In the following description, the first outer peripheral side coil conductor set B1 includes a coil conductor of a first turn T1 and a coil conductor of a second turn T2, and the second outer peripheral side coil conductor set B2 is a coil conductor of a third turn T3. And the third outer coil conductor set B3 includes a coil conductor of the fifth turn T5 and a coil conductor of the sixth turn T6, and the fourth outer coil conductor set B4 includes the coil conductor of the fourth turn T4. It consists of a 7-turn T7 coil conductor and an 8th turn T8 coil conductor.
In addition, positions P1 to P16 indicate positions in the slots 21 where the rising conductor portions 33 rise from the slots 21.

As shown in FIGS. 14 and 16, the coil conductor (T1) of the first turn, the rising conductor portion (P2) rising from the circumferential inner slot 21A in the first in-phase slot set S1, and the second turn The rising conductor portion (P3) that is the coil conductor (T2) and rises from the outer circumferential slot 21B in the second in-phase slot set S2 is defined by the transition coil end conductor portion 32Z (symbol a in FIG. 16). It is connected.
A second turn coil conductor (T2), a rising conductor portion (P4) rising from a circumferentially outer slot 21B in the first in-phase slot set S1, and a third turn coil conductor (T3) The rising conductor portion (P5) rising from the circumferentially inner slot 21A in the two in-phase slot sets S2 is connected by a transition coil end conductor portion 32Z (symbol b in FIG. 16).

A third-turn coil conductor (T3) that rises from a circumferentially inner slot 21A in the first in-phase slot set S1, and a fourth-turn coil conductor (T4) The rising conductor portion (P7) rising from the outer circumferential slot 21B in the two in-phase slot sets S2 is connected by a transition coil end conductor portion 32Z (symbol c in FIG. 16).
A fourth-turn coil conductor (T4) that rises from a circumferentially outer slot 21B in the first in-phase slot set S1, and a fifth-turn coil conductor (T5) The rising conductor portion (P9) rising from the circumferentially inner slot 21A in the two in-phase slot sets S2 is connected by a transition coil end conductor portion 32Z (symbol d in FIG. 16).

As shown in FIGS. 14 and 16, the coil conductor (T5) of the fifth turn, the rising conductor portion (P10) rising from the circumferential inner slot 21A in the first in-phase slot set S1, and the sixth turn The rising conductor portion (P11) that is the coil conductor (T6) and rises from the circumferentially outer slot 21B in the second in-phase slot set S2 is defined by the transition coil end conductor portion 32Z (symbol e in FIG. 16). It is connected.
A sixth-turn coil conductor (T6), a rising conductor portion (P12) rising from a circumferentially outer slot 21B in the first in-phase slot set S1, and a seventh-turn coil conductor (T7) The rising conductor portion (P13) rising from the circumferentially inner slot 21A in the two in-phase slot sets S2 is connected by a transition coil end conductor portion 32Z (symbol f in FIG. 16).

  A seventh-turn coil conductor (T7) that rises from the circumferentially inner slot 21A in the first in-phase slot set S1, and an eighth-turn coil conductor (T8) The rising conductor portion (P15) rising from the outer circumferential slot 21B in the two in-phase slot sets S2 is connected by a transition coil end conductor portion 32Z (symbol g in FIG. 16).

  Further, in this example, the coil conductor of the first turn T1 (one coil conductor 4A of the first outer peripheral side coil conductor set B1) is connected to the second in-phase slot group from one lead conductor end portion 36. After entering the first outer circumferential side position A1 (first position) P1 of the slot 21A on the circumferential inner side in S2 from the one axial side L1, and then turning around the circumferential one side C1, in the first in-phase slot set S1 The first outer peripheral side position A1 (second position) P2 of the slot 21A on the inner side in the circumferential direction enters from the other side L2 in the axial direction, and then the transition coil end conductor portion 32Z (symbol a in FIG. 16) of the stator core 2 On the one axial side L1, from the second position P2 to the first outer peripheral side position A1 (third position) P3 of the circumferentially outer slot 21B in the second in-phase slot set S2. It is over.

  The coil conductor of the second turn T2 (the other coil conductor 4B in the first outer periphery side coil conductor set B1) enters the third position P3 from the one side L1 in the axial direction, and then turns around the one side C1 in the circumferential direction. Thereafter, the first outer-side slot 21B in the first in-phase slot set S1 enters the first outer peripheral side position A1 (fourth position) P4 of the slot 21B from the other axial side L2, and then the transition coil end conductor portion 32Z (FIG. 16). As a symbol b), the second outer peripheral side position A2 (fifth position) P5 of the slot 21A on the inner circumferential side in the second in-phase slot set S2 from the fourth position P4 on the one axial side L1 of the stator core 2. It has crossed over to.

  The coil conductor of the third turn T3 (one coil conductor 4A in the second outer peripheral side coil conductor set B2) enters the fifth position P5 from the one axial side L1 and then turns around the one circumferential side C1. Thereafter, the second outer peripheral side position A2 (sixth position) P6 of the circumferentially inner slot 21A in the first in-phase slot set S1 enters from the other side L2 in the axial direction, and then the transition coil end conductor portion 32Z (FIG. 16). As a symbol c), the second outer peripheral position A2 (seventh position) P7 of the slot 21B on the outer circumferential side in the second in-phase slot set S2 from the sixth position P6 on the one axial side L1 of the stator core 2 is shown. It has crossed over to.

  The coil conductor of the fourth turn T4 (the other coil conductor 4B in the second outer peripheral side coil conductor set B2) enters the seventh position P7 from the one side L1 in the axial direction, and then turns around the one side C1 in the circumferential direction. Thereafter, the second outer peripheral side position A2 (eighth position) P8 of the circumferentially outer slot 21B in the first in-phase slot group S1 enters from the other side L2 in the axial direction, and then the transition coil end conductor portion 32Z (FIG. 16). As an inner symbol d), on the one axial side L1 of the stator core 2, from the eighth position P8 to the third outer peripheral side position A3 (9th position) P9 of the slot 21A on the inner circumferential side in the second in-phase slot set S2. It has crossed over to.

  The coil conductor of the fifth turn T5 (one coil conductor 4A of the third outer periphery side coil conductor set B3) enters the ninth position P9 from the one side L1 in the axial direction and then turns around one side C1 in the circumferential direction. Thereafter, the third outer peripheral side position A3 (tenth position) P10 of the slot 21A on the circumferential inner side in the first in-phase slot set S1 enters from the other side L2 in the axial direction, and then the transition coil end conductor portion 32Z (FIG. 16). As an inner symbol e), on the one axial side L1 of the stator core 2, from the tenth position P10 to the third outer peripheral side position A3 (11th position) P11 of the slot 21B on the outer circumferential side in the second in-phase slot set S2. It has crossed over to.

  The coil conductor of the sixth turn T6 (the other coil conductor 4B in the third outer periphery side coil conductor set B3) enters the eleventh position P11 from the one side L1 in the axial direction, and then turns around one side C1 in the circumferential direction. Then, the third outer peripheral side position A3 (the twelfth position) P12 of the outer circumferential slot 21B in the first in-phase slot set S1 enters from the other side L2 in the axial direction, and then the transition coil end conductor portion 32Z (FIG. 16). As a symbol f), the fourth outer peripheral position A4 (13th position) P13 of the slot 21A on the inner circumferential side in the second in-phase slot set S2 from the twelfth position P12 on the one axial side L1 of the stator core 2. It has crossed over to.

  The coil conductor of the seventh turn T7 (one coil conductor 4A in the fourth outer peripheral side coil conductor set B4) enters the thirteenth position P13 from the one side L1 in the axial direction, and then turns around one side C1 in the circumferential direction. After that, it enters the fourth outer peripheral side position A4 (14th position) P14 of the slot 21A on the inner circumferential side in the first in-phase slot set S1 from the other side L2 in the axial direction, and then the transition coil end conductor portion 32Z (FIG. 16). As the symbol g), the fourth outer peripheral position A4 (fifteenth position) P15 of the slot 21B on the outer circumferential side in the second in-phase slot set S2 from the fourteenth position P14 on the one axial side L1 of the stator core 2. It has crossed over to.

  The coil conductor of the eighth turn T8 (the other coil conductor 4B of the fourth outer periphery side coil conductor set B4) enters the fifteenth position P15 from the one side L1 in the axial direction, and then turns around one side C1 in the circumferential direction. Thereafter, the first outer-phase slot 21B in the first in-phase slot set S1 enters the fourth outer peripheral position A4 (16th position) P16 of the slot 21B from the other axial side L2, and then, on the one axial side L1 of the stator core 2, The other lead conductor end portion 37 is drawn from the sixteenth position P16.

Also in the stator 1 of this example, by adopting a configuration in which the stator core 2 and the three-phase coils 3U, 3V, and 3W are divided and assembled into one axial side L1 and the other side L2, the coil conductor 4A of each turn is adopted. 4B can be connected continuously without using a separate conductor such as a crossover conductor.
Also in this example, other configurations are the same as those of the first embodiment, and the same effects as those of the first embodiment can be obtained.

FIG. 3 is a perspective view showing a stator in the first embodiment. FIG. 3 is an explanatory diagram illustrating an arrangement state of three-phase coils in the stator in the first embodiment. The perspective view which shows the one side stator core part which has arrange | positioned the one side coil part in Example 1. FIG. The perspective view which shows the other side stator core part which has arrange | positioned the other side coil part in Example 1. FIG. The perspective view which shows the state which joins the edge part for joining in the one side coil part arrange | positioned in the one side stator core part in Example 1, and the edge part for joining in the other side coil part arrange | positioned in the other side stator core part. The perspective view which shows the state which forms a connection core part by the some division | segmentation core in Example 1. FIG. Explanatory drawing which expands and shows the joining position of the edge part for joining in the one side coil part in Example 1, and the edge part for joining in the other side coil part. FIG. 3 is an explanatory diagram schematically showing a U-phase coil in Example 1. The perspective view which shows the state which has arrange | positioned only the one side coil part for comprising the coil of W phase in Example 1 in the one side stator core part. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram schematically showing a formation state of a U-phase transition coil end conductor portion in a stator in Embodiment 1; FIG. 3 is a schematic explanatory view showing the transition coil end conductor portion in the first embodiment when viewed from one axial side of the stator core. The perspective view which shows the formation state of the coil end conductor part for transition in Example 1. FIG. The side view which shows the state which joined the edge part for joining in the one side coil part, and the edge part for joining in the other side coil part in Example 1. FIG. Explanatory drawing which expand | deploys typically and shows the coil of U phase in Example 2. FIG. FIG. 6 is an explanatory diagram simply showing a state of formation of a U-phase transition coil end conductor portion in a stator in Example 2; FIG. 10 is a schematic explanatory view showing a transition coil end conductor portion in the second embodiment when viewed from one axial side of a stator core.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stator 2 Stator core 2A One side stator core part 2B The other side stator core part 2C Connection core part 21 Slot 22 Teeth 25 Divided core 3U U-phase three-phase coil 3V V-phase three-phase coil 3W W-phase three-phase coil 3A One side coil part 3B The other side coil part 30 Coil end part 301 Square conductor 31 Slot conductor part 32 Coil end conductor part 32Z Crossover coil end conductor part 33 Upright conductor part 35A, 35B Joining end part 4A One coil conductor 4B The other coil conductor L Axial direction C Circumferential direction R Radial direction

Claims (7)

In a stator comprising a plurality of slots formed along the axial direction of the stator core and three-phase coils of U phase, V phase and W phase arranged in a distributed winding state,
The stator core is formed by connecting a one-side stator core portion arranged on one side in the axial direction and a second stator core portion arranged on the other side in the axial direction by a connecting core portion arranged between the two stator core portions,
The coils of the respective phases are formed by bending a rectangular conductor and are arranged in a slot of the one-side stator core portion and are arranged in a slot of the one-side stator core portion, and a substantially U-shape arranged in the slot of the other-side stator core portion. The other end coil portion, and the joining end portion of the one side coil portion and the joining end portion of the other side coil portion are joined in the slot of the connecting core portion, A stator characterized by being formed in a wave winding shape that makes a round in a direction. In Claim 1, the said connection core part is comprised from the some division | segmentation core divided | segmented in the circumferential direction in the formation position of the both-sides slot adjacent to the circumferential direction both sides of the center side slot which is either of these slots. And
The stator core is formed by fitting the plurality of divided cores between the one side stator core portion and the other side stator core portion from the outer peripheral side of the joining end portions joined to each other. Stator. In Claim 1 or 2, the coil of each phase is formed by arranging a plurality of coil conductors in the radial direction in the slot,
The stator is characterized in that the joining positions of the joining end portions of at least adjacent coil conductors among the plurality of coil conductors are shifted from each other in the axial direction. 4. The plurality of slots according to claim 1, wherein the plurality of slots are repeated in the order of two adjacent U-phase slots, two adjacent V-phase slots, and two adjacent W-phase slots. Formed,
The coils of each phase include two sets of coil conductors arranged in an in-phase slot group that is adjacent to each other in two rounds in the circumferential direction of the stator core in the radial direction of the stator core. Are arranged on top of each other,
The set of two coil conductors is formed by arranging coil end conductor portions arranged outside the axial end face of the stator core side by side in the axial direction of the stator core,
In the coils of the respective phases, any one of the two outer coil conductors in the set of two outer peripheral coil conductors positioned on the outer peripheral side in the radial direction of the stator core, and the two inner peripheral coil conductors overlapping the inner peripheral side. A stator, characterized in that a transition coil end conductor portion for connecting with any one of the coil conductors is provided so as to overlap in the radial direction. 5. The crossover coil end conductor portion in the two sets of coil conductors according to claim 4, wherein the transition coil end conductor portion is adjacent to two slots in the first in-phase slot set in the circumferential direction. Crossing two slots in the second in-phase slot set
The two sets of outer peripheral coil conductors are one coil conductor (T1) and the other coil conductor (T2), and the two sets of inner coil conductors are one coil conductor (T3). When the other coil conductor (T4) is used,
The first coil conductor (T1), the first rising conductor portion (P2) rising from the circumferentially inner slot in the first in-phase slot set, and the one coil conductor (T3), A second rising conductor portion (P3) rising from the circumferentially inner slot in the second in-phase slot set is connected by the transition coil end conductor portion;
A third rising conductor portion (P14) that rises from the outer circumferential slot in the first in-phase slot set, and the other coil conductor (T2), The fourth rising conductor portion (P15) rising from the circumferentially outer slot in the second in-phase slot set is connected by the transition coil end conductor portion;
Each of the coil conductors in the plurality of sets of two coil conductors in a plurality of stages is directly and continuously connected only by the transition coil end conductor part and the rising conductor part. 5. The crossover coil end conductor portion in the two sets of coil conductors according to claim 4, wherein the transition coil end conductor portion is adjacent to two slots in the first in-phase slot set and in the circumferential direction with respect to the first in-phase slot set. Crossing two slots in the second in-phase slot set
The two sets of outer peripheral coil conductors are one coil conductor (T1) and the other coil conductor (T2), and the two sets of inner coil conductors are one coil conductor (T3). When the other coil conductor (T4) is used,
The first coil conductor (T1), the first rising conductor portion (P2) rising from the circumferentially inner slot in the first in-phase slot set, and the other coil conductor (T2), A second rising conductor portion (P3) rising from the circumferentially outer slot in the second in-phase slot set is connected by the transition coil end conductor portion;
A third rising conductor portion (P4) rising from the outer circumferential slot in the first in-phase slot set, and the one coil conductor (T3), A fourth rising conductor portion (P5) rising from the circumferentially inner slot in the second in-phase slot set is connected by the transition coil end conductor portion;
Each of the coil conductors in the plurality of sets of two coil conductors in a plurality of stages is directly and continuously connected only by the transition coil end conductor part and the rising conductor part. 7. The V-phase coil end conductor portion is bent at the center portion in the circumferential direction on one side and the other side in the axial direction of the stator core according to claim 1. And a V-phase outer circumferential conductor portion located on the radially outer peripheral side and a V-phase inner circumferential conductor portion located on the other circumferential side and located on the radially inner circumferential side. ,
The coil end conductor portion of the U phase overlaps one circumferential side conductor portion thereof on the outer circumference side of the V phase inner circumference side conductor portion, and the other circumferential side conductor portion is placed on the V phase inner circumference side conductor. It is arranged overlapping the outer peripheral side of the circumferential one side conductor portion of the coil end conductor portion of the W phase adjacent to the other circumferential side of the portion,
The coil end conductor portion of the W phase overlaps the other side conductor portion in the circumferential direction on the inner circumference side of the V phase outer circumference side conductor portion, and the circumferential direction one side conductor portion becomes the V phase outer circumference side conductor portion. A stator, wherein the stator is disposed so as to overlap with the inner peripheral side of the other side conductor portion in the circumferential direction of the U-phase coil end conductor portion adjacent to one side in the circumferential direction.

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