JP2010011569A - Stator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stator which can be improved in output characteristic, dimension accuracy, assembling accuracy and assembling performance when arranging coil conductors to a stator core in a distributed winding state. <P>SOLUTION: The stator 1 is constituted by arranging the coil conductors 3 to a plurality of slots 21 in the stator core 2 in the distributed winding state. The coil conductor 3 is formed into such a wave winding state that the coil conductor goes around the peripheral direction C of the stator core 2 by connecting a slot conductor 31 and a coil-end conductor 32 by using erecting conductors 33. The stator core 2 has an external peripheral protrusion 23 which is annularly protruded to the outside of an axial direction L from axial end faces 221 of a plurality of teeth 22 at its entire periphery, and a plurality of divided tooth blocks 5 which are connected to the internal periphery of the external peripheral protrusion 23 so that the plurality of teeth 22 are extended to the outside of the axial direction L independently from the plurality of teeth 22. A plurality of the erecting conductors 33 are arranged between the adjacent divided tooth blocks 5, respectively. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a stator in which coil conductors are arranged in a distributed winding state in a plurality of slots in a stator core.

  In a stator of a rotating electrical machine such as a motor, a generator, and a motor generator used in an automobile or the like, usually, a coil conductor is linearly arranged in a slot provided in parallel to the axial direction of the stator core, and the coil is formed from the axial end surface of the stator core. The remainder of the conductor is projected to form a stator. And the part which protruded from the axial direction end surface of the stator core becomes a useless part which is not utilized for formation of a magnetic circuit as a coil end part, and does not affect an output characteristic.

For example, in the AC motor of Patent Document 1, an auxiliary iron core formed by laminating electromagnetic steel sheets is added to the tip and outer periphery of the teeth of the stator iron core, and the length of the rotor is added to the auxiliary iron core. Just long. As a result, the auxiliary iron core is added to the coil end portion as a useless area that does not affect the output characteristics, and the torque generated by the motor is increased without increasing the winding dimensions.
However, Patent Document 1 discloses a technique relating to a stator formed by winding an armature winding around a teeth portion of a stator core (stator core) in a so-called concentrated winding state. For this reason, when arranging the armature winding in a distributed winding state with respect to the slots of the stator core, no contrivance has been made for improving the output characteristics.

Further, for example, in the stator of the rotating electrical machine disclosed in Patent Document 2, a stepped portion is formed in the iron core at a circumferential position where the coil current phase changes at the inner diameter side axial end of the stator iron core. Thereby, a large temperature rise based on the eddy current loss is reduced, and the maximum value of the temperature rise generated in the circumferential direction is reduced.
However, Patent Document 2 aims to reduce a large temperature rise based on eddy current loss, and does not aim to improve output characteristics of a motor or the like formed by a stator core. For this reason, even in Patent Document 2, when armature windings are arranged in a distributed winding state with respect to the slots of the stator core, no contrivance for improving output characteristics is made.

Further, for example, in the rotating electrical machine disclosed in Patent Document 3, when a wave winding is disposed in a core and a stator is manufactured, the core is used in order to make it easier to dispose a coil conductor made of a rectangular wire in the slot. It divides | segments in each slot, arrange | positions a coil conductor between these divided | segmented core pieces, and has assembled the stator.
However, in Patent Document 3, it is difficult to ensure the roundness of the core, and when the area of the joint portion of the core piece is increased, the magnetic permeability of the core may be reduced and output characteristics may be deteriorated.

JP 2004-159476 A JP 2003-199267 A JP 2000-139048 A

  The present invention has been made in view of such conventional problems, and improves the output characteristics, dimensional accuracy and assembly accuracy, and assembly properties when the coil conductor is disposed on the stator core in a distributed winding state. It is intended to provide a stator that can be used.

The present invention provides a stator in which coil conductors are arranged in a distributed winding state in a plurality of slots provided between a plurality of teeth in a stator core.
The coil conductor includes a slot conductor portion disposed in the slot in a state parallel to the axial direction of the stator core, and a coil end conductor portion disposed along the circumferential direction of the stator core outside the axial end surface of the stator core. Are connected to each other by a rising conductor portion that rises axially outward from the axial end face of the tooth continuously from the slot conductor portion, and alternately on one side and the other side in the axial direction of the slot conductor portion. It is formed in a wave shape that connects the coil end conductor portions a plurality of times and goes around the circumferential direction of the stator core,
The stator core is separated from the plurality of teeth by an outer peripheral projecting portion projecting in an annular shape outwardly in the axial direction from the axial end surfaces of the plurality of teeth on the entire circumference, and the plurality of teeth are shafts. A plurality of divided tooth blocks coupled to the inner periphery of the outer peripheral protrusion to extend outward in the direction,
The plurality of upright conductor portions may be arranged between the adjacent divided tooth blocks, respectively, in the stator (claim 1).

In the stator of the present invention, the shape of the stator core when the coil conductors are arranged in a distributed winding state is devised.
Specifically, in the present invention, by projecting the outer peripheral projecting portion on the axial end surface of the stator core, it is integrated into an annular shape corresponding to the length accommodating the slot conductor portion and the rising conductor portion. The stator core thus formed can be formed.
Accordingly, the stator core can be formed while maintaining the annular shape over the entire length of the stator core that can also accommodate the rising conductor portion, and the roundness of the stator core can be ensured. Further, since only the divided tooth block is divided in the stator core, when the divided tooth block is coupled to the stator core, the coupling area is small, and deterioration of the magnetic permeability of the stator core can be suppressed.

Further, since the stator core can accommodate not only the slot conductor part but also the rising conductor part, the area for forming the magnetic circuit can be enlarged when used as a stator. Thereby, the output characteristic of a stator can be improved.
Further, as described above, since the roundness of the stator core can be ensured, the dimensional accuracy and assembly accuracy of the stator can be improved.

In addition, when the coil conductor is arranged with respect to the stator core by combining the plurality of divided tooth blocks to form the stator core that can accommodate the slot conductor portion and the rising conductor portion, the coil conductor is: It can arrange | position with respect to the stator core in the state where the some division | segmentation tooth block is not couple | bonded. Then, a divided tooth block is inserted from the radially inner peripheral side between adjacent rising conductor portions protruding from the axial end surface of the stator core after the coil conductor is arranged, and this divided tooth block is inserted into the teeth of the teeth. It can be joined to the axial end face.
Thereby, it can prevent that a division | segmentation tooth block becomes an obstacle at the time of arranging a coil conductor. Therefore, the assembly | attachment property of a stator can be improved.

  Therefore, according to the present invention, it is possible to provide a stator capable of improving output characteristics, dimensional accuracy and assembly accuracy, and assembly properties when the coil conductor is disposed on the stator core in a distributed winding state. it can.

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.
In addition, a slot-corresponding protrusion that protrudes outward in the axial direction from a portion corresponding to the bottom of the plurality of slots is integrally provided on the inner periphery of the outer periphery protrusion, and the plurality of divided tooth blocks are: It is preferable that it is fitted between the adjacent slot-corresponding protrusions (Claim 2).

In this case, it is possible to form a yoke portion for forming a magnetic circuit in the stator by the slot corresponding protrusions so as to expand to the outer peripheral side in the radial direction with respect to the rising conductor portion.
Further, by inserting the divided tooth block between adjacent slot-corresponding projecting portions, the divided tooth block can be coupled to an accurate position on the axial end surface of the tooth in the stator core.

Further, the outermost peripheral upright conductor portion located on the outermost peripheral side of the upright conductor portions is formed in an inclined shape that increases in diameter toward the outer peripheral side in the radial direction as it goes outward in the axial direction of the stator core. In addition, it is preferable that the inner peripheral surface of the slot-corresponding protrusion is formed as an inclined surface along the inclined shape of the outermost peripheral upright conductor portion.
In this case, by forming the slot-corresponding protrusion along the inclined shape of the outermost peripheral rising conductor portion, the yoke portion for forming a magnetic circuit in the stator can be used with respect to the outermost peripheral rising conductor portion. It can be formed more enlarged toward the outer peripheral side in the radial direction.
The inclined surface formed on the axial end surface of the slot-corresponding protrusion can be formed by various surfaces such as a substantially linear inclined surface, a curved inclined surface, and a stepped inclined surface.

In addition, on the inner peripheral side surface of the outer peripheral protruding portion, there are recessed recesses in which a portion located between the adjacent slot corresponding protruding portions is recessed on the outer peripheral side in the radial direction to the axial end of the outer peripheral protruding portion, respectively. Preferably, the plurality of divided tooth blocks are fitted between the adjacent slot-corresponding protrusions and in the recessed recesses (claim 4).
In this case, the division | segmentation teeth block can be more reliably positioned with respect to a stator core by inserting the outer peripheral side edge part of a division | segmentation teeth block in a depression recessed part.

The stator core includes the U-phase, V-phase, and W-phase coil conductors, and the plurality of slots in the stator core includes the slot conductor portions in the U-phase coil conductor. There are two U-phase slots, two V-phase slots in which the slot conductor portions of the V-phase coil conductor are disposed, and two W-phase slots in which the slot conductor portions are disposed in the W-phase coil conductor. Preferably, the stator cores are provided adjacent to each other in the circumferential direction, and a plurality of slot conductor portions of each phase are arranged in the radial direction in the slots of each phase. ).
In this case, it is possible to improve the output characteristics, dimensional accuracy, assembly accuracy, and assembly property of the stator for a three-phase rotating electrical machine having a three-phase coil conductor.

Embodiments of the stator according to the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the stator 1 of this example is configured by arranging coil conductors 3 in a distributed winding state in slots 21 provided between a plurality of teeth 22 in the stator core 2. As shown in FIGS. 2 and 4, the coil conductor 3 includes the stator core 2 on the outer side of the slot conductor portion 31 disposed in the slot 21 in a state parallel to the axial direction L of the stator core 2 and the axial end surface 201 of the stator core 2. The coil end conductor portion 32 disposed along the circumferential direction C of the coil 22 is connected by the rising conductor portion 33 rising from the axial end surface 221 of the tooth 22 continuously from the slot conductor portion 31, and the axis of the slot conductor portion 31. The coil end conductor portions 32 are alternately connected to the one side L1 and the other side L2 a plurality of times so as to form a wave winding that makes a round in the circumferential direction C of the stator core 2.

As shown in FIGS. 5 and 6, the stator core 2 has an outer peripheral protrusion 23 that protrudes in an annular shape outward from the axial end face 221 of the plurality of teeth 22 in the axial direction L, as shown in FIGS. As shown in FIG. 9, a plurality of divided tooth blocks 5 are provided separately from the plurality of teeth 22 and coupled to the inner periphery of the outer peripheral projection 23 so as to extend the plurality of teeth 22 outward in the axial direction L. is doing. The plurality of divided tooth blocks 5 are bonded to the axial end surface 221 of each tooth 22 with an adhesive.
As shown in FIG. 2, the plurality of rising conductor portions 33 are arranged between the adjacent divided tooth blocks 5.

Hereinafter, the stator 1 of this example will be described in detail with reference to FIGS.
As shown in FIGS. 1 and 3, the stator 1 of this example is used for a three-phase AC motor such as a hybrid car or an electric vehicle, and includes U-phase, V-phase, and W-phase three-phase coils 3U, 3V, 3W is assembled to the stator core 2. The coil conductor 3 of this example is composed of a flat wire formed by forming an insulating coating on the surface of a conductor base material having a substantially square cross section made of a copper material. Moreover, as shown in FIG. 4, the coil conductor 3 is formed in a wave winding shape by performing bending. FIG. 3 is a diagram schematically showing an arrangement state of the coil end conductor portion 32 outside the axial end surface 201 in the stator 1.

As shown in FIG. 3, in the plurality of slots 21 in the stator core 2, a U-phase slot 21U in which the slot conductor portion 31U in the U-phase coil conductor 3U is arranged and a slot conductor portion 31V in the V-phase coil conductor 3V are arranged. Two V-phase slots 21 </ b> V and two W-phase slots 21 </ b> W in which the slot conductor portions 31 </ b> W of the W-phase coil conductor 3 </ b> W are arranged are provided adjacent to each other in the circumferential direction C of the stator core 2.
As shown in FIG. 2, the coil conductors 3 of the respective phases are adjacent to each other, and the two in-phase slot conductor portions 31 disposed in the in-phase slots 21 are arranged outside the axial end surface 201 of the stator core 2. After rising from the axial end surface 201 of the stator core 2 as the rising conductor portions 33, two in-phase coil end conductor portions 32 are formed in the circumferential direction C so as to be aligned in the axial direction of the stator core 2. .
The coil conductor 3 has the same cross-sectional area in each of the slot conductor portion 31, the coil end conductor portion 32, and the rising conductor portion 33.

As shown in FIGS. 3 and 5, three slot conductor portions 31 are arranged side by side in the radial direction R in the slot 21 of each phase in the stator core 2. When the slots 21 are combined, three-phase coil conductors 3U, 3V, and 3W of U phase, V phase, and W phase are arranged for 6 turns (6 rounds).
Further, outside the axial end surface 201 of the stator core 2, the stator core 2 is positioned between the two in-phase coil end conductor portions 32 arranged in the axial direction L of the stator core 2 in the radial direction R of the stator core 2. Two coil end conductor portions 32 of other phases arranged in the axial direction L are arranged to form a coil end portion 30. In FIG. 5, in the coil end portion 30, the axial direction of the stator core 2 between the two U-phase coil end conductor portions 32 </ b> U aligned in the axial direction L of the stator core 2 toward the radial direction R of the stator core 2. A state is shown in which two V-phase coil end conductor portions 32V arranged in L are arranged.

As shown in FIGS. 2 and 5, in the stator 1, the coil conductors 3 that arrange the slot conductor portions 31 in the slots 21 that are adjacent to each other are arranged in a pair so as to go around the stator core 2. Yes. The two sets of coil conductors 3 are arranged side by side in the radial direction R.
As shown in FIGS. 3 and 5, two sets of coil conductors 3 in each phase are arranged in the axial direction L in the U-phase coil conductor 3 </ b> U outside the axial end surface 201 of the stator core 2. The end conductor portion 32U, two coil end conductor portions 32V arranged in the axial direction L in the V-phase coil conductor 3V, and two coil end conductor portions 32W arranged in the axial direction L in the W-phase coil conductor 3W The coil end conductor portions 32 of any one of the three phases and the coil end conductor portions 32 of the other phases are arranged in two rows in the radial direction R at each portion in the circumferential direction C of 2. .

  That is, as shown in FIG. 3, outside of the axial end surface 201 of the stator core 2, the coil end conductor portions 32 of different phases arranged in two rows in the radial direction R at each portion in the circumferential direction C are U-phase. Two U-phase coil end conductor portions 32U arranged in the axial direction L in the coil conductor 3U are arranged on the outer peripheral side in the radial direction R, and two W-phase coil end conductors arranged in the axial direction L in the W-phase coil conductor 3W. The portion 32W is disposed on the inner peripheral side in the radial direction R, and two V-phase coil end conductor portions 32V arranged in the axial direction L in the V-phase coil conductor 3V are bent on the outer peripheral side and the inner peripheral side in the radial direction R. Are arranged.

  Further, outside the axial end surface 201 of the stator core 2, each part in the circumferential direction C of the stator 1 is a part where the U-phase coil end conductor part 32 </ b> U and the V-phase coil end conductor part 32 </ b> V are arranged in the radial direction R. The V-phase coil end conductor portion 32V and the W-phase coil end conductor portion 32W are arranged in the radial direction R, and the U-phase coil end conductor portion 32U and the W-phase coil end conductor portion 32W are in the radial direction R. A lined part is formed.

  In addition, as shown in FIG. 5, interphase insulating paper 42 is disposed between the coil end conductor portions 32 of different phases. Further, the slot insulating paper 41 is also arranged in the slot 21. After the slot conductor 41 is wrapped from the outer peripheral side by the slot insulating paper 41, the insulating wedge can be arranged on the inner peripheral side.

  As shown in FIG. 6, the stator core 2 is formed by laminating a plurality of electromagnetic steel plates 26 formed in a predetermined thickness in the axial direction L. The plurality of electromagnetic steel plates 26 can be laminated via an adhesive. Similarly to the stator core 2, the divided teeth block 5 can be formed by laminating a plurality of electromagnetic steel plates formed in a predetermined thickness in the axial direction L. The divided tooth block 5 can also be formed from a green compact obtained by compression-molding a soft magnetic metal powder.

Further, as shown in FIGS. 6 and 8, the inner periphery of the outer peripheral protrusion 23 in the stator core 2 extends outward in the axial direction L from the portion positioned on the outer peripheral side in the radial direction R with respect to the bottom of the plurality of slots 21. A slot-corresponding projecting portion 24 projecting from the front is integrally provided. Further, on the inner peripheral side surface of the outer peripheral protrusion 23, there are recessed recesses 25 in which a portion located between adjacent slot corresponding protrusions 24 is recessed on the outer peripheral side in the radial direction R, respectively. Part.
In the stator core 2 of this example, the slot corresponding protrusion 24, the outer peripheral protrusion 23, and the recessed recess 25 are formed integrally with the stator core 2 formed with a plurality of slots 21 and teeth 22, and have a predetermined thickness. The shape of the electromagnetic steel sheet 26 formed in the above is changed as appropriate in the axial direction L, and a plurality of electromagnetic steel sheets 26 having the changed shape are stacked.

As shown in FIGS. 6, 7, and 9, the plurality of divided tooth blocks 5 of the present example are fitted between the adjacent slot-corresponding protrusions 24, and the outer peripheral side end in the radial direction R is depressed. In a state of being fitted in the recess 25, the teeth 22 are coupled to the axial end surfaces 221 via an adhesive. Further, the divided tooth block 5 has an outer peripheral end portion coupled to the depressed recess 25.
The divided tooth block 5 can also be adhered to at least one of the slot corresponding protrusion 24 and the insertion recess 25.
FIG. 7 is a view showing the axial end surface 201 of the stator core 2 in a state where the divided tooth blocks 5 are arranged. FIG. 9 is a diagram showing a portion where the teeth 22 are formed in the stator core 2 in a state where the divided tooth blocks 5 are arranged, cut in the radial direction R.

  Further, as shown in FIG. 5, the outermost peripheral upright conductor portion 33 </ b> A located on the outermost peripheral side among the plurality of upright conductor portions 33 arranged in the radial direction R of the stator core 2 is the outer side in the axial direction L of the stator core 2. It is formed in the inclination shape which expands to the outer peripheral side of radial direction R as it goes to. Further, in this example, the intermediate upright conductor portion 33B positioned in the middle of the radial direction R of the stator core 2 is directed outward in the axial direction L at a gentler inclination angle than the outermost peripheral side upright conductor portion 33A. Accordingly, it is formed in an inclined shape that expands toward the outer peripheral side in the radial direction R. Further, the innermost peripheral side rising conductor portion 33C, which is the rising conductor portion 33 located on the innermost peripheral side in the radial direction R of the stator core 2, includes an outermost peripheral side rising conductor portion 33A and an intermediate rising conductor portion 33B. It can be formed inclined to the same outer peripheral side, and can also be formed inclined to the inner peripheral side opposite to these (see FIG. 2).

  As shown in FIGS. 5 and 6, the outermost peripheral upright conductor portion 33 </ b> A of this example is formed by being bent from the vicinity of the axial end surface 221 of the tooth 22 joining the divided tooth block 5 to the outer peripheral side in an inclined manner. It is. Further, the axial end face of the slot corresponding protrusion 24 is formed on an inclined surface 241 along the inclined shape of the outermost peripheral upright conductor portion 33A. Thereby, the yoke part for forming the magnetic circuit in the stator 1 can be formed to be further enlarged toward the outer peripheral side in the radial direction R with respect to the outermost peripheral side upright conductor part 33A. Further, the inclined surface 241 formed on the end surface in the axial direction of the slot corresponding protrusion 24 can have various inclined shapes. For example, as shown in FIG. It can also be formed in a step shape.

Next, a method for manufacturing the stator 1 of this example will be described.
When manufacturing the stator core 2 of the present example, first, a wave winding coil conductor 3 is formed by performing bending processing, pressure molding, or the like on a rectangular wire having a substantially square cross section. At this time, the coil conductor 3 of each phase has a shape that follows the arc shape in the circumferential direction C of the stator core 2 with a set of two coil conductors 3 in which the slot conductor portions 31 are arranged in the adjacent slots 21. Can be formed.
Next, as shown in FIGS. 5 and 10, the slot insulating paper 41 is disposed in each slot 21 of the stator core 2, and the slots of the coil conductors 3 for each phase of a set of two from the inner peripheral side of the slot insulating paper 41. The conductor part 31 is disposed. Further, at this time, in the coil end conductor portion 32 of the set of two coil conductors 3, the interphase insulating paper 42 is disposed between the coil end conductor portions 32 of the other phases, and the inner peripheral side in the circumferential direction C. Place it on top of the other.
When the coil conductor 3 is disposed on the stator core 2, the divided tooth block 5 is not attached to the stator core 2.

  Subsequently, after three sets of three-phase coil conductors 3 are repeatedly arranged on the stator core 2, as shown in FIGS. 2 and 5, the stator core 2 projects from the axial end surface 201 of the stator core 2. The divided teeth block 5 is inserted from the inner peripheral side in the radial direction R between the rising conductor portions 33 to be performed. And the outer peripheral side edge part of the division | segmentation tooth block 5 is inserted between the adjacent slot corresponding | compatible protrusion parts 24 and the recessed part 25, and it joins to the axial direction end surface 221 of the teeth 22 via an adhesive agent. In this way, the stator 1 for a three-phase rotating electrical machine in which the three-phase coil conductors 3U, 3V, and 3W are disposed can be manufactured.

In the stator 1 for a three-phase rotating electrical machine of this example, the shape of the stator core 2 when the coil conductor 3 is arranged in a distributed winding state is devised.
Specifically, in this example, by projecting the outer peripheral protruding portion 23 on the axial end surface 201 of the stator core 2, the length corresponding to the length in which the slot conductor portion 31 and the rising conductor portion 33 are accommodated is determined. The stator core 2 integrated in a ring shape can be formed.
Thereby, the stator core 2 can be formed while maintaining the annular shape over the entire length of the stator core 2 that can also accommodate the rising conductor portion 33, and the roundness of the stator core 2 can be ensured. Further, since only the divided tooth block 5 is divided in the stator core 2, when the divided tooth block 5 is coupled to the stator core 2, the coupling area is small, and deterioration of the magnetic permeability of the stator core 2 is suppressed. Can do.

Further, in the stator 1 of this example, the stator core 2 can accommodate not only the slot conductor portion 31 but also the rising conductor portion 33, so that when the stator 1 is used, the magnetic circuit forming area can be enlarged. Can do. Thereby, the output characteristic of the stator 1 can be improved.
Further, as described above, since the roundness of the stator core 2 can be ensured, the dimensional accuracy and assembly accuracy of the stator 1 can be improved.

In addition, when the coil conductor 3 is disposed with respect to the stator core 2 by forming the stator core 2 by connecting the plurality of divided tooth blocks 5 to accommodate the slot conductor portion 31 and the rising conductor portion 33. The coil conductor 3 can be arranged with respect to the stator core 2 in a state where the plurality of divided tooth blocks 5 are not coupled. And the division | segmentation teeth block 5 is inserted from the inner peripheral side of radial direction R between the standing conductor parts 33 which protrude from the axial direction end surface 201 of the stator core 2 after arrange | positioning the coil conductor 3, This division teeth The block 5 can be joined to the axial end surface 221 of the tooth 22.
Thereby, it can prevent that the division | segmentation teeth block 5 becomes an obstruction at the time of arrangement | positioning of the coil conductor 3. FIG. Therefore, the assembling property of the stator 1 can be improved.

  Therefore, according to this example, when the coil conductor 3 is disposed on the stator core 2 in a distributed winding state, the three-phase rotating electrical machine that can improve output characteristics, dimensional accuracy, assembly accuracy, and assembly properties. The stator 1 can be easily manufactured.

The perspective view which shows the stator in an Example. The perspective view which expands and shows the periphery of the coil end part in a stator in an Example. The top view which shows typically the arrangement | positioning state of the coil end conductor part in the outward of the axial direction end surface in a stator in an Example. Sectional drawing which shows the arrangement state of the coil conductor in a stator in the Example in the state cut | disconnected by radial direction. Sectional drawing which shows the arrangement | positioning state of the coil end conductor part in a stator in an Example, and a standing conductor part in the state cut | disconnected in radial direction. The perspective view which shows the periphery of the axial direction end surface in a stator core in an Example. The top view which shows the axial direction end surface in a stator core in an Example in the state which has arrange | positioned the division | segmentation tooth block. Sectional drawing which shows the formation part of the slot in a stator core in a Example, and slot corresponding protrusion part in the state cut | disconnected in radial direction. Sectional drawing which shows the formation site | part of the state of the state which has arrange | positioned the division | segmentation teeth block in a stator core in the Example cut | disconnected in radial direction. The perspective view which expands and shows the periphery of the coil end part in a stator in an Example in the state before arrange | positioning a division | segmentation tooth block in a stator core. The perspective view which shows the periphery of the axial direction end surface in a stator core in an Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stator 2 Stator core 201 Axial direction end face 21 Slot 22 Teeth 23 Outer peripheral protrusion 24 Slot corresponding protrusion 25 Recessed depression 3 Coil conductor 30 Coil end part 31 Slot conductor part 32 Coil end conductor part 33 Standing conductor part 5 Divided tooth block C Circumferential direction L axis direction R radial direction

Claims (5)

In a stator in which coil conductors are arranged in a distributed winding state in a plurality of slots provided between a plurality of teeth in a stator core,
The coil conductor includes a slot conductor portion disposed in the slot in a state parallel to the axial direction of the stator core, and a coil end conductor portion disposed along the circumferential direction of the stator core outside the axial end surface of the stator core. Are connected to each other by a rising conductor portion that rises axially outward from the axial end face of the tooth continuously from the slot conductor portion, and alternately on one side and the other side in the axial direction of the slot conductor portion. It is formed in a wave shape that connects the coil end conductor portions a plurality of times and goes around the circumferential direction of the stator core,
The stator core is separated from the plurality of teeth by an outer peripheral projecting portion projecting in an annular shape outwardly in the axial direction from the axial end surfaces of the plurality of teeth on the entire circumference, and the plurality of teeth are shafts. A plurality of divided tooth blocks coupled to the inner periphery of the outer peripheral protrusion to extend outward in the direction,
The stator, wherein the plurality of upright conductor portions are respectively disposed between the adjacent divided tooth blocks. In Claim 1, the slot corresponding protrusion part which protrudes to an axial direction outward from the part corresponding to the bottom of a plurality of slots is provided integrally in the inner periphery of the perimeter protrusion part,
The stator according to claim 1, wherein the plurality of divided tooth blocks are fitted between the adjacent slot corresponding protrusions. In Claim 1 or 2, the outermost peripheral side upright conductor portion located on the outermost peripheral side among the upright conductor portions increases in diameter toward the outer peripheral side in the radial direction as it goes outward in the axial direction of the stator core. It is formed in an inclined shape that
The stator according to claim 1, wherein an inner peripheral surface of the slot corresponding projecting portion is formed on an inclined surface along the inclined shape of the outermost peripheral upright conductor portion. 4. The recessed portion in which a portion located between the adjacent slot-corresponding protruding portions is recessed on the outer peripheral side in the radial direction is provided on each inner peripheral side surface of the outer peripheral protruding portion. Formed to the axial end,
The stator according to claim 1, wherein the plurality of divided tooth blocks are fitted between the adjacent slot-corresponding protrusions and in the recessed recesses. In any 1 paragraph of Claims 1-4, the above-mentioned coil conductor of three phases, the U phase, the V phase, and the W phase, is arranged in the above-mentioned stator core,
The plurality of slots in the stator core include a U-phase slot in which the slot conductor portion in the U-phase coil conductor is disposed, a V-phase slot in which the slot conductor portion in the V-phase coil conductor is disposed, Two W-phase slots in which the slot conductor portions of the W-phase coil conductor are arranged are provided adjacent to each other in the circumferential direction of the stator core;
A stator in which a plurality of slot conductor portions of each phase are arranged in the radial direction in the slots of each phase.

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