JP6929469B2 - stator - Google Patents

Description

The present invention relates to a stator comprising a stator core and a coil wound around the teeth of the stator core via an insulator.

The conventional stator includes an insulator mounted on the axial end of the teeth portion of the stator core, and the insulator includes a coil winding portion protruding outward from the end portion of the teeth portion and a coil winding portion. A guide groove formed in the coil so as to guide the coil winding start portion from the radial outer side to the radial inner side, and a guide groove protruding from the upper end near the radial inner end of the guide groove to come into contact with the coil housed in the guide groove. Therefore, it is provided with a protrusion for preventing the coil from rising (see, for example, Patent Document 1). As a result, the coil was accommodated in the guide groove and guided from the outer side in the radial direction to the inner side in the radial direction, and then wound around the coil winding portion so as to orbit around the tooth portion.

Japanese Unexamined Patent Publication No. 2006-187073

The coil is wound around the coil winding portion while applying tension so that the winding collapse does not occur. However, in the conventional stator, only the radial inner end of the coil housed in the guide groove is in contact with the protrusion to prevent the coil from floating, so that the coil housed in the guide groove is lifted at the radial outer end. It will occur. The radial outer lift of the coil accommodated in the guide groove hindered the stable winding of the coil around the coil winding portion.

The present invention has been made to solve the above problems, and an object of the present invention is to obtain a stator capable of stably winding a coil around a tooth.

The stator according to the present invention is attached to each of the stator core having a yoke extending linearly or annularly and a plurality of teeth protruding from the yoke and arranged in a row in the extending direction of the yoke, and each of the plurality of teeth. A plurality of insulators and a plurality of coils attached to each of the plurality of teeth are provided. Each of the plurality of insulators includes a first insulator mounted on the first end surface side of the teeth to be mounted among the plurality of teeth, and a second insulator mounted on the second end surface side of the teeth to be mounted. And. The first insulator protrudes from the first winding body portion arranged on the first end surface of the tooth to be mounted and the yoke-side end portion of the first winding body portion in a direction orthogonal to the first end surface. It has a first yoke-side flange portion and a first teeth-side flange portion that protrudes from the anti-yoke side end portion of the first winding body portion in a direction orthogonal to the first end surface. The second insulator projects from the second winding body portion arranged on the second end surface of the tooth to be mounted and the yoke side end portion of the second winding body portion in a direction orthogonal to the second end surface. The second yoke-side flange portion is formed on the second winding body portion, the second teeth-side flange portion projecting from the anti-yoke side end portion of the second winding body portion in a direction orthogonal to the second end surface, and the second winding body portion. A conductor wire guide groove for accommodating the conductor wire so as to guide the conductor wire from the side of the second yoke-side flange portion to the side of the second teeth-side flange portion, and the conductor wire formed in the second yoke-side flange portion. The yoke side conductor wire introduction groove for introducing the wire from the yoke side into the conductor wire guide groove and the yoke side for preventing the conductor wire from floating in contact with the conductor wire introduced into the yoke side conductor wire introduction groove. The teeth side formed on the conductor wire guide surface and the second teeth side flange portion, and leads the conductor wire from the conductor wire guide groove to the opposite side of the second teeth side flange portion to the second winding body portion. The conductor wire lead-out groove is formed on at least one side of the conductor wire lead-out groove and the tooth-side conductor wire lead-out groove of the second tooth-side flange portion, and the conductor wire is drawn out from the tooth-side conductor wire lead-out groove. It has a teeth-side conductor wire introduction groove to be introduced into the portion, and a teeth-side conductor wire guide surface which is in contact with the conductor wire derived from the teeth-side conductor wire lead-out groove to prevent the conductor wire from floating. Each of the plurality of coils has the conductor wire introduced into the second winding body from the tooth side conductor wire introduction groove so as to orbit around each of the plurality of teeth. And the second winding body are wound around the body.

According to the present invention, the rise of the conductor wire introduced into the yoke-side conductor wire introduction groove is prevented by the yoke-side conductor wire guide surface. The lift of the conductor wire led out from the conductor wire lead-out groove on the teeth side is prevented by the guide surface of the conductor wire on the teeth side. As a result, the end portion of the conductor wire housed in the conductor wire guide groove on the flange portion side on the second yoke side and the end portion on the flange portion side on the second tooth side are prevented from rising, so that the coil is stable to the teeth. The winding is realized.

It is an end view which looked at the stator which concerns on Embodiment 1 of this invention from the outside in the axial direction. It is a perspective view which shows the coil assembly in the stator which concerns on Embodiment 1 of this invention. FIG. 3 is a cross-sectional view taken along the line III-III of FIG. FIG. 1 is a cross-sectional view taken along the line IV-IV of FIG. It is a perspective view which shows the 1st insulator in the stator which concerns on Embodiment 1 of this invention. It is a perspective view which shows the 2nd insulator in the stator which concerns on Embodiment 1 of this invention. It is a figure explaining the winding method of the coil in the stator which concerns on Embodiment 1 of this invention. It is a figure explaining the winding method of the coil in the stator which concerns on Embodiment 1 of this invention.

Embodiment 1.
FIG. 1 is an end view of the stator according to the first embodiment of the present invention viewed from the outside in the axial direction, and FIG. 2 is a perspective view and a view showing a coil assembly in the stator according to the first embodiment of the present invention. 3 is a cross-sectional view taken along the line III-III of FIG. 1, FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG. 1, and FIG. 5 shows a first insulator in the stator according to the first embodiment of the present invention. A perspective view and FIG. 6 are perspective views showing a second insulator in the stator according to the first embodiment of the present invention. Here, in FIG. 1, O is the axis of the stator. In the present specification, the direction parallel to the axis O is the axial direction, the direction orthogonal to the axis O is the radial direction, and the direction of rotation about the axis O is the circumferential direction.

In FIG. 1, the stator 100 includes an annular stator core 1 and a stator coil 2 mounted on the stator core 1. The stator 100 is configured by arranging 24 coil assemblies 3 in an annular shape. Although not shown, the 24 coil assemblies 3 are inserted into the annular frame by shrink fitting, press fitting, or the like in a state of being arranged in an annular shape, and are integrated.

As shown in FIGS. 2 to 4, the coil assembly 3 includes a T-shaped split core 4 having an arcuate yoke portion 5 and teeth 6 protruding inward in the radial direction from the inner peripheral wall surface of the yoke portion 5. , The first insulator 10 and the second insulator 20 which are attached to the split core 4 from both sides in the axial direction and cover the teeth 6, and the conductor wires 9 to the first insulator 10 and the second insulator 20 so as to orbit around the teeth 6. A coil 8 formed by winding the coil 8 and the like. The conductor wire 9 is, for example, a conductor wire having a circular cross section, which is made of a continuous copper wire, an aluminum wire, or the like which is insulated and coated with an enamel resin and has no connecting portion.

The divided core 4 is manufactured by integrating a predetermined number of T-shaped core pieces punched from a magnetic thin plate such as an electromagnetic steel plate in a laminated state. The stator core 1 is formed by arranging the 24 divided cores 4 in an annular shape with the side surfaces of the yoke portion 5 in the circumferential direction abutting each other. Twenty-four yoke portions 5 are connected in the circumferential direction to form an annular yoke of the stator core 1, and a space formed by the yoke and the teeth 6 adjacent to the yoke constitutes a slot. Twenty-four teeth 6 are arranged in a row at an equiangular pitch in the circumferential direction of the annular yoke, that is, in the direction in which the yoke extends. The 24 coils 8 constitute the stator coil 2.

The first insulator 10 is a resin molded body using an insulating resin such as polyphenylene sulfide (PPS) resin. As shown in FIG. 5, the first insulator 10 has a substantially rectangular cross section orthogonal to the length direction in which both corners on the upper side are rounded, and the length direction coincides with the radial direction of the teeth 6. The bottom surface is arranged along the first end face, which is one end face in the axial direction of the teeth 6, and has a first winding body portion 11 that covers the first end face. The first insulator 10 has a width equivalent to the circumferential width of the yoke portion 5, and is formed from one end of the first winding body 11 in the length direction to the opposite side of the bottom surface of the first winding body 11. Further, it further has a first yoke-side flange portion 12 projecting on both sides in the width direction. The first insulator 10 projects from the end on the other side in the length direction of the first winding body 11 to the side opposite to the bottom surface of the first winding body 11 and on both sides in the width direction. Further have. The first insulator 10 includes both side portions in the width direction of the first winding body portion 11, and protrusions of the first yoke side flange portion 12 and the first teeth side flange portion 13 from the first winding body portion 11 to both sides in the width direction. On the side opposite to the upper surface of the first winding body portion 11, a thin first skirt portion 14 that protrudes by half the axial length of the teeth 6 and covers the side surface of the teeth 6 and the inner wall surface of the yoke portion 5 is further formed. Have. Further, a pair of conductor wire lead-out grooves 15a and 15b are formed in the first yoke-side flange portion 12 so as to extend from the upper surface of the first yoke-side flange portion 12 to both side portions of the first winding body portion 11. .. When the first insulator 10 is mounted on the first end surface side of the teeth 6, the end on one side in the length direction of the first winding body 11 is the end on the yoke side of the first winding body 11. Therefore, the end of the first winding body 11 on the other side in the length direction becomes the end of the first winding body 11 on the opposite side of the yoke.

The second insulator 20 is a resin molded body using an insulating resin such as polyphenylene sulfide (PPS) resin. As shown in FIG. 6, the second insulator 20 has a substantially rectangular cross section orthogonal to the length direction in which both corners on the upper side are rounded, and the length direction coincides with the radial direction of the teeth 6. The bottom surface is arranged along the second end face, which is the other end face in the axial direction of the teeth 6, and has a second winding body portion 21 that covers the second end face. The second insulator 20 has a width equivalent to the circumferential width of the yoke portion 5, and is formed from one end of the second winding body 21 in the length direction to the opposite side of the bottom surface of the second winding body 21. Further, it further has a second yoke-side flange portion 22 protruding on both sides in the width direction. The second insulator 20 projects from the end on the other side in the length direction of the second winding body 21 to the side opposite to the bottom surface of the second winding body 21 and on both sides in the width direction. Further have. The second insulator 20 projects from both side portions of the second winding body portion 21 in the width direction, and the second yoke side flange portion 22 and the second tooth side flange portion 23 from the second winding body portion 21 in the width direction to both sides. A thin second skirt portion 24 that protrudes from the portion to the side opposite to the upper surface of the second winding body portion 21 by half the axial length of the teeth 6 and covers the side surface of the teeth 6 and the inner wall surface of the yoke portion 5. Have more. When the second insulator 20 is mounted on the second end surface side of the teeth 6, the end on one side in the length direction of the second winding body 21 is the end on the yoke side of the second winding body 21. The end of the second winding body 21 on the other side in the length direction becomes the end of the second winding body 21 on the opposite side of the yoke.

A pair of yoke-side conductor wire lead-out grooves 25a and 25b are formed in the second yoke-side flange portion 22 so as to extend from the upper surface of the second yoke-side flange portion 22 to both side portions of the second winding body portion 21. The yoke-side conductor wire introduction groove 26 is formed in the second yoke-side flange portion 22 so as to extend from the upper surface of the second yoke-side flange portion 22 to the central portion in the width direction of the second winding body portion 21. A pair of teeth-side conductor wire introduction grooves 27a and 27b are formed in the second teeth-side flange portion 23 so as to extend from the upper surface of the second teeth-side flange portion 23 to both side portions of the second winding body portion 21. The teeth-side conductor wire lead-out groove 28 is formed in the second teeth-side flange portion 23 so as to extend from the upper surface of the second teeth-side flange portion 23 to the central portion in the width direction of the second winding body portion 21. The conductor wire guide groove 29 is formed so as to recess the upper surface of the second winding body portion 21 from the yoke-side conductor wire introduction groove 26 to the teeth-side conductor wire lead-out groove 28. The groove depth and groove width of the conductor wire guide groove 29 are slightly larger than the diameter of the conductor wire 9. The bottom surfaces of the yoke-side conductor wire introduction groove 26 and the tooth-side conductor wire lead-out groove 28 are flush with the bottom surface of the conductor wire guide groove 29.

The portions between the pair of yoke-side conductor wire lead-out grooves 25a and 25b of the second yoke-side flange portion 22 and the yoke-side conductor wire introduction grooves 26 are the first folded portions 30, respectively. The second winding body in the direction in which the wall surface of the first folding portion 30 opposite to the second winding body 21 projects from the root of the first folding portion 30 to the side opposite to the bottom surface of the second winding body 21. It is formed on an inclined surface gradually separated from the portion 21, and becomes a yoke-side conductor wire guide surface 31.

The portions between the pair of teeth-side conductor wire introduction grooves 27a and 27b of the second teeth-side flange portion 23 and the teeth-side conductor wire lead-out grooves 28 are the second folded-back portions 32, respectively. The second winding body in the direction in which the wall surface of the second folding portion 32 opposite to the second winding body 21 projects from the root of the second folding portion 32 to the side opposite to the bottom surface of the second winding body 21. It is formed on an inclined surface gradually separated from the portion 21, and becomes a conductor wire guide surface 33 on the teeth side.

The first insulator 10 and the second insulator 20 configured in this way are mounted on the split core 4 from both sides in the axial direction. As a result, the coil assembly in which the coil is not mounted is assembled. In the coil assembly in which the coil is not mounted, the first winding body portion 11 is arranged on the first end surface of the teeth 6. The first yoke-side flange portion 12 is arranged on the first end surface of the yoke portion 5. The first teeth side flange portion 13 is arranged at the inner diameter side end portion on the first end surface of the teeth 6. Further, the second winding body portion 21 is arranged on the second end surface of the teeth 6. The second yoke-side flange portion 22 is arranged on the second end surface of the yoke portion 5. The second teeth side flange portion 23 is arranged at the inner diameter side end portion on the second end surface of the teeth 6. Then, both end faces in the axial direction and both side portions in the circumferential direction of the teeth 6 are covered with the first winding body portion 11, the second winding body portion 21, the first skirt portion 14, and the second skirt portion 24.

Next, the winding method of the coil 8 will be described with reference to FIGS. 7 and 8. 7 and 8 are views for explaining a coil winding method in the stator for an electromechanical machine according to the first embodiment of the present invention, respectively, and FIG. 7 shows a first coil assembly in a coil-unmounted state. A plan view seen from the insulator side, FIG. 8 is a plan view of the coil assembly in the coil-unmounted state as seen from the second insulator side. In addition, in FIG. 7 and FIG. 8, the alternate long and short dash line indicates the winding procedure of the conductor wire 9.

First, the winding start side of the conductor wire 9 is drawn from the yoke portion 5 side to the first winding body portion 11 side through the conductor wire lead-out insertion groove 15a of the first yoke side flange portion 12 of the first insulator 10. Next, the conductor wire 9 passes through the side portions of the first winding body portion 11, the first skirt portion 14, the second skirt portion 24, and the second winding body portion 21, and the flange on the second yoke side of the second insulator 20. It is guided to the side of the portion 22. Next, the conductor wire 9 is pulled out to the yoke portion 5 side through the yoke-side conductor wire lead-out groove 25a of the second yoke-side flange portion 22. The conductor wire lead-out groove 25a on the yoke side is located on the side facing the conductor wire lead-out groove 15a. Then, the conductor wire 9 is folded back along the yoke-side conductor wire guide surface 31 of the first folded-back portion 30, and is drawn into the second winding body portion 21 side through the yoke-side conductor wire introduction groove 26. Then, the conductor wire 9 is guided to the second tooth side flange portion 23 side through the inside of the conductor wire guide groove 29.

Then, the conductor wire 9 is pulled out to the side opposite to the second winding body portion 21 through the teeth side conductor wire lead-out groove 28 of the second teeth side flange portion 23 of the second insulator 20. Then, the conductor wire 9 is folded back along the tooth-side conductor wire guide surface 33 of the second folded-back portion 32, and is drawn into the second winding body portion 21 side through the tooth-side conductor wire introduction groove 27b. Then, the conductor wire 9 is guided to the first insulator 10 side through each side portion of the second winding body portion 21, the second skirt portion 24, the first skirt portion 14, and the first winding body portion 11. After that, the conductor wire 9 is wound a predetermined number of times so as to orbit around the first winding body portion 11, the first skirt portion 14, the second skirt portion 24, and the second winding body portion 21, and the first yoke is wound. It reaches the side flange portion 12 and the second yoke side flange portion 22. As a result, the first layer conductor wire 9 is wound. Next, the conductor wire 9 is wound on the first layer conductor wire 9 to the first tooth side flange portion 13 and the second tooth side flange portion 23, and the second layer conductor wire 9 is wound. Further, the conductor wire 9 is wound on the second layer conductor wire 9 up to the first yoke side flange portion 12 and the second yoke side flange portion 22, and the third layer conductor wire 9 is wound. Next, the conductor wire 9 is wound on the third layer conductor wire 9 toward the first tooth side flange portion 13 and the second tooth side flange portion 23 side, and the fourth layer conductor wire 9 is wound. Further, the conductor wire 9 is wound on the fourth layer conductor wire 9 up to the first yoke side flange portion 12 and the second yoke side flange portion 22, and the fifth layer conductor wire 9 is wound. After that, the winding end side of the conductor wire 9 is pulled out from the conductor wire lead-out inlet groove 15b of the first yoke side flange portion 12 to the yoke portion 5 side. As a result, a coil assembly 3 equipped with a coil 8 formed by winding the conductor wire 9 in five layers can be obtained.

Here, the slot has a trapezoidal shape in which the width in the circumferential direction gradually increases toward the yoke portion 5. Therefore, as shown in FIG. 3, the number of layers of the coil 8 is increased stepwise toward the yoke portion 5 to increase the space factor.

Next, the conductor wire 9 drawn out from the coil assembly 3 to which the coil 8 is mounted has a conductor wire lead-out groove 15a of the flange portion 12 on the first yoke side of the first insulator 10 of the adjacent coil assembly 3 to which the coil is not mounted. It is pulled through to the body 11 side of the first volume. Then, the conductor wire 9 is wound around the teeth 6 of the coil assembly 3 in the same procedure. By repeating this operation, the coil 8 is mounted on four coil assemblies 3 which are continuous in the circumferential direction. As a result, as shown in FIG. 1, six coil groups formed by connecting four coils 8 in series are arranged in the circumferential direction. Each coil group constitutes a phase coil. Then, the six phase coils are AC-connected to form the stator coil 2.

The stator 100 configured in this way is applied to an inner rotor type rotary electric machine.

In the first embodiment, the conductor wire 9 is guided to the conductor wire guide groove 29 through the yoke side conductor wire introduction groove 26, and is guided to the second tooth side flange portion 23 side through the conductor wire guide groove 29. Next, the conductor wire 9 in the conductor wire guide groove 29 is pulled out to the side opposite to the second winding body 21 through the conductor wire lead-out groove 28 on the teeth side. Further, the conductor wire 9 is folded back along the second folded portion 32, and is guided to the second winding body portion 21 side through the tooth side conductor wire introduction groove 27b. The conductor wire 9 guided to the second winding body 21 side is wound so as to orbit around the teeth 6 of the coil assembly 3. As a result, the odd-numbered layer coil 8 is formed.

The outer diameter side surface of the first folded-back portion 30 is formed as an inclined surface gradually away from the two-winding body portion 21 from the root toward the outward in the axial direction to form the yoke-side conductor wire guide surface 31. Therefore, by introducing the conductor wire 9 into the conductor wire guide groove 29 through the yoke-side conductor wire introduction groove 26 along the yoke-side conductor wire guide surface 31, a force for pressing the conductor wire 9 against the yoke portion 5 side is generated. .. As a result, the conductor wire 9 is prevented from floating. The inner diameter side surface of the second folded-back portion 32 is formed as an inclined surface gradually away from the two-winding body portion 21 from the root toward the outer side in the axial direction to form the teeth-side conductor wire guide surface 33. Therefore, the conductor wire 9 drawn from the conductor wire lead-out groove 28 on the teeth side is introduced into the conductor wire introduction groove 27b on the teeth side along the guide surface 33 of the conductor wire on the teeth side, so that the conductor wire 9 is pressed against the teeth 6 side. Force is generated. As a result, the conductor wire 9 is prevented from floating. As a result, the conductor wire 9 accommodated in the conductor wire guide groove 29 does not float, and the conductor wire 9 can be stably wound around the coil winding portion including the first winding body portion 11 and the second winding body portion 21. It will be possible. Therefore, the coil 8 wound in a state where the conductor wires 9 are aligned is obtained, and the occurrence of unwinding is suppressed.

A pair of teeth-side conductor wire introduction grooves 27a and 27b are formed on the second teeth-side flange portion 23 of the second insulator 20 with the teeth-side conductor wire lead-out groove 28 interposed therebetween. Therefore, the conductor wire 9 drawn out through the teeth-side conductor wire lead-out groove 28 can be drawn into the second winding body 21 side from the introduction groove selected from the pair of teeth-side conductor wire introduction grooves 27a and 27b. As a result, for example, by pulling the conductor wire 9 from the teeth side conductor wire introduction groove 27a toward the second winding body 21 side, the conductor wire 9 is drawn into the teeth 6 in the direction opposite to the winding direction shown by the alternate long and short dash line in FIG. Can be wrapped around. Therefore, the winding directions of the four coils 8 constituting the phase coil can be arbitrarily set. Further, it is not necessary to prepare a dedicated second insulator 20 for each winding direction of the conductor wire 9 wound around the teeth 6.

A pair of conductor wire lead-out grooves 15a and 15b are formed in the first yoke-side flange portion 12 of the first insulator 10, and a pair of yoke-side conductor wire lead-out grooves 25a, in the second yoke-side flange portion 22 of the second insulator 20. It forms 25b. Therefore, in FIG. 7, the conductor wire 9 extending from the left side is drawn into the first winding body 11 side through the conductor wire lead-out groove 15a. Further, in FIG. 7, the conductor wire 9 extending from the right side is drawn into the first winding body 11 side through the conductor wire lead-out groove 15b. As described above, it is not necessary to manufacture the dedicated first insulator 10 and second insulator 20 for each pull-in direction of the conductor wire 9 in the circumferential direction.

Since the four coils 8 are configured by winding one conductor wire 9 in succession, the connection step of the coils 8 for forming the phase coil becomes unnecessary.

In the first embodiment, the pair of yoke-side conductor wire lead-out grooves 25a and 25b are formed in the second yoke-side flange portion 22 of the second insulator 20, but they are formed in the second yoke-side flange portion 22. There may be only one lead-out groove for the conductor wire on the yoke side. That is, the conductor wire lead-out groove on the yoke side is located on the side of the pair of conductor wire lead-out groove 15a and 15b of the first yoke-side flange portion 12 opposite to the conductor wire lead-out groove into which the conductor wire 9 is introduced. It suffices if it is formed in the flange portion 22 on the second yoke side so as to do so.

Further, in the first embodiment, the first insulator 10 is arranged on the connection side, but the second insulator may be arranged on the connection side. In this case, the winding start side of the conductor wire 9 passes through the yoke-side conductor wire introduction groove 26 along the yoke-side conductor wire guide surface 31 of the first folded-back portion 30 on the left side in FIG. Be guided. Then, the conductor wire 9 is guided from the conductor wire guide groove 29 through the tooth side conductor wire lead-out groove 28 to the side opposite to the second winding body portion 21. Next, the conductor wire 9 is folded back along the second folded-back portion 32, and is guided to the second winding body portion 21 side through the tooth-side conductor wire introduction groove 27b. Then, the conductor wire 9 is wound around the first winding body portion 11 and the second winding body portion 21 so as to orbit around the teeth 6. After that, the winding end side of the conductor wire 9 is pulled out from the conductor wire lead-out groove 25a on the yoke side to the yoke portion 5 side. As a result, the coil 8 is formed. Here, the pair of conductor wire lead-out groove 15a and 15b of the first insulator 10 arranged on the anti-connection side can be omitted. Further, the yoke-side conductor wire lead-out groove 25b of the second insulator 20 can be omitted, but it may not be omitted. That is, the yoke-side conductor wire lead-out groove 25b serves as a lead-out groove that pulls out the winding end of the coil 8 to the yoke portion 5 side when the conductor wire 9 is introduced into the yoke-side conductor wire introduction groove 26 from the right side in FIG. Used.

Further, in the first embodiment, the stator applied to the inner rotor type rotary electric machine is described, but the stator according to the present invention may be a stator applied to the outer rotor type rotary electric machine.

Further, in the first embodiment, the stator applied to a rotating electric machine such as an electric motor and a generator is described, but the stator according to the present invention may be a stator applied to a linear motor such as a linear motor. good. In this case, the stator core comprises a yoke extending linearly and a plurality of teeth protruding from the yoke in a direction orthogonal to the extending direction of the yoke and arranged in a row at a constant pitch in the extending direction of the yoke. Be prepared.

Further, in the first embodiment, the stator coil has six coil groups composed of four coils formed by winding one conductor wire in succession, but constitutes a coil group. The number of coils to be used is not limited to four. Further, although the wiring work between the coils is increased, each of the coils may be formed by winding one conductor wire.

1 stator core, 2 stator coil, 5 yoke part, 6 teeth, 8 coils, 9 conductor wire, 10 1st insulator, 11 1st winding body, 12 1st yoke side flange, 13 1st teeth side flange , 15a, 15b Conductor wire lead-out groove, 20 2nd insulator, 21 2nd winding body, 22 2nd yoke-side flange, 23 2nd teeth-side flange, 25a, 25b York-side conductor wire lead-out groove, 26 Yoke side conductor wire introduction groove, 27a, 27b Teeth side conductor wire introduction groove, 28 Teeth side conductor wire lead out groove, 29 Conductor wire guide groove, 31 York side conductor wire guide surface, 33 Teeth side conductor wire guide surface, 100 stator ..

Claims (7)

A stator core having a yoke extending linearly or annularly and a plurality of teeth protruding from the yoke and arranged in a row in the extending direction of the yoke.
Multiple insulators attached to each of the above multiple teeth,
With a plurality of coils attached to each of the above-mentioned plurality of teeth,
Each of the plurality of insulators includes a first insulator mounted on the first end surface side of the teeth to be mounted among the plurality of teeth, and a second insulator mounted on the second end surface side of the teeth to be mounted. And with
The first insulator protrudes from the first winding body portion arranged on the first end surface of the tooth to be mounted and the yoke-side end portion of the first winding body portion in a direction orthogonal to the first end surface. It has a first yoke-side flange portion and a first teeth-side flange portion that protrudes from the anti-yoke side end portion of the first winding body portion in a direction orthogonal to the first end surface.
The second insulator projects from the second winding body portion arranged on the second end surface of the tooth to be mounted and the yoke side end portion of the second winding body portion in a direction orthogonal to the second end surface. The second yoke-side flange portion is formed on the second winding body portion, the second teeth-side flange portion projecting from the anti-yoke side end portion of the second winding body portion in a direction orthogonal to the second end surface, and the second winding body portion. A conductor wire guide groove for accommodating the conductor wire so as to guide the conductor wire from the side of the second yoke-side flange portion to the side of the second teeth-side flange portion, and the conductor wire formed in the second yoke-side flange portion. The yoke side conductor wire introduction groove for introducing the wire from the yoke side into the conductor wire guide groove and the yoke side for preventing the conductor wire from floating in contact with the conductor wire introduced into the yoke side conductor wire introduction groove. The teeth side formed on the conductor wire guide surface and the second teeth side flange portion, and leads the conductor wire from the conductor wire guide groove to the opposite side of the second teeth side flange portion to the second winding body portion. The conductor wire lead-out groove is formed on at least one side of the conductor wire lead-out groove and the tooth-side conductor wire lead-out groove of the second tooth-side flange portion, and the conductor wire is drawn out from the tooth-side conductor wire lead-out groove. It has a tooth-side conductor wire introduction groove to be introduced into the portion, and a tooth-side conductor wire guide surface which is in contact with the conductor wire derived from the tooth-side conductor wire lead-out groove to prevent the conductor wire from floating.
Each of the plurality of coils has the conductor wire introduced into the second winding body from the tooth side conductor wire introduction groove so as to orbit around each of the plurality of teeth. And the stator formed by winding around the second volume body. The yoke-side conductor wire guide surface is formed on the side of the second yoke-side flange portion opposite to the second winding body portion and at least one surface of the yoke-side conductor wire introduction groove on the second yoke-side from the root. It is formed on an inclined surface gradually away from the second winding body in the protruding direction of the flange portion.
The tooth-side conductor wire guide surface is formed on the side of the second-teeth-side flange portion opposite to the second winding body portion, and between the tooth-side conductor wire lead-out groove and the tooth-side conductor wire introduction groove. The stator according to claim 1, which is formed on an inclined surface gradually separated from the second winding body portion in the projecting direction of the second tooth side flange portion from the root. The stator according to claim 1 or 2, wherein the teeth-side conductor wire introduction grooves are formed on both sides of the teeth-side conductor wire lead-out grooves of the second teeth-side flange portion. Claims 1 to claim that the yoke-side conductor wire guide surface is formed on the side of the second yoke-side flange portion opposite to the second winding body portion and on both side surfaces of the yoke-side conductor wire introduction groove. The stator according to any one of 3. A pair of conductor wire lead-out groove is formed in the flange portion on the first yoke side so as to be separated from each other in the extending direction of the yoke.
The yoke-side conductor wire lead-out groove is formed on the side of the second yoke-side flange portion on the opposite side of the yoke-side conductor wire guide surface so as to be opposite to the yoke-side conductor wire introduction groove.
In the conductor wire, the winding start side is located on the side of the pair of conductor wire lead-out grooves facing the yoke-side conductor wire lead-out groove, and the winding start side is moved from one conductor wire lead-out groove to the first winding body side. It is introduced and guided to the second yoke side flange portion side, is led out from the yoke side conductor wire lead-out groove, is folded back along the yoke side conductor wire guide surface, and is the conductor wire from the yoke side conductor wire introduction groove. The stator according to any one of claims 1 to 4, which is guided by a guide groove and whose winding end side is derived from the other conductor wire lead-out inlet groove of the pair of conductor wire lead-out inlet grooves. The yoke-side conductor wire lead-out groove is formed on the side of the second yoke-side flange portion opposite to the yoke-side conductor wire guide surface with the yoke-side conductor wire introduction groove interposed therebetween.
The winding start side of the conductor wire is guided from the yoke-side conductor wire introduction groove to the conductor wire guide groove along the yoke-side conductor wire guide surface, and the winding end side is led out from the yoke-side conductor wire lead-out groove. The stator according to any one of claims 1 to 4. The plurality of coils according to any one of claims 1 to 6, wherein the plurality of coils include a plurality of coil groups composed of two or more coils formed by continuously winding one of the conductor wires. Stator.

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