JPWO2019235071A1 - Rotating machine stator and rotating machine - Google Patents

Abstract

An iron core (10) having a yoke portion (111) having a recess (117) on the outer peripheral surface (12), a plurality of teeth portions (112) having a shoe portion (114), and each tooth portion (112) It is provided with a coil portion (11) wound via a first insulator portion (130) and a second insulator portion (120), and the second insulator portion (120) is a slot (113) between the teeth portions (112). It is made of sheet-like insulating material installed in the iron core (10), has protruding portions (121) protruding from both ends in the axial direction (Y) of the iron core (10), and the first insulator portion (130) is of the iron core (10). It is installed at both ends in the axial direction (Y) and has insulating properties, and is in contact with the protruding portion (121) and is inserted into the recess (117) in the radial direction (X) of the first protruding portion (132) and the shoe portion (114). A second protrusion (133) that sandwiches the second insulator portion (120) is provided between the outside (X1) and the side surface (41).

Description

The present application relates to a stator of a rotary electric machine and a rotary electric machine which can prevent an increase in iron loss and improve performance.

In a conventional rotary electric electric machine, an iron core having a plurality of slots in which windings are housed, an insulator arranged on both axial end surfaces of the iron core to electrically insulate between the winding and the iron core teeth, and the slot. It is composed of a slot insulating paper that is inserted and electrically insulates between the winding and the inner peripheral surface of the iron core, and the insulator is a wall portion extending toward the inside of the slot that electrically insulates the winding and the iron core. And the slot has a dimension in which both ends of the shaft method are larger than the intermediate portion so as to accommodate the insulator wall portion, that is, in the iron core tooth, both ends of the shaft method are smaller than the intermediate portion. Further, by arranging the slot insulating paper so as to overlap the winding side surface of the wall portion of the insulator at both ends in the axial direction, the space of the insulator wall portion that reduces the winding space is eliminated inside the slot. It has been proposed to increase the cross-sectional area of the electric wire (see, for example, Patent Document 1).

Further, in other conventional rotary electric machines, those having a structure substantially similar to that of Patent Document 1 as a split iron core have been proposed. Further, it has been proposed that a partial notch is provided at both ends of the shaft method of the iron core tooth to be smaller than the intermediate portion, and the insulator portion with respect to the notch is thickened to contribute to the improvement of strength and positioning. (See, for example, Patent Document 2).

Japanese Unexamined Patent Publication No. 2001-112205 JP-A-2017-103850

The iron core of the stator in the conventional rotary electric machine is formed so that the width in the circumferential direction of both ends in the axial direction of the teeth is narrower than the width in the circumferential direction of the middle portion in order to accommodate the insulator wall portion. There is a problem that the iron loss increases as compared with the iron core in which the width in the circumferential direction of both ends in the axial direction is the same as the width in the circumferential direction of the middle portion, which leads to a decrease in the performance of the rotary electric machine. This is more likely to affect the shorter the axial length of the iron core. Further, since the shapes of both ends in the axial direction and the intermediate portion of the teeth are different, there is a problem that the number of dies and processes for manufacturing the iron core increases, and the cost of the iron core increases.

The present application discloses a technique for solving the above-mentioned problems, and an object of the present application is to provide a stator of a rotary electric machine and a rotary electric machine which can prevent an increase in iron loss and improve performance.

The stator of the rotary electric machine disclosed in the present application is
A yoke in which at least one yoke portion is arranged in the circumferential direction and is formed in an annular shape, and
The yoke portion has a tooth portion protruding inward in the radial direction on the inner peripheral surface on the inner side in the radial direction.
The teeth portion includes an iron core having shoe portions formed so as to project in the circumferential direction on both sides in the circumferential direction of the inner tip in the radial direction.
Insulating first insulators installed at both ends in the axial direction along the central axis of the iron core,
In the teeth portion, sheets are installed on the side surfaces of both ends in the circumferential direction of the teeth portion, on the inner peripheral surface of the yoke portion extending from the side surface, and on the outer side surface in the radial direction of each shoe portion. A second insulator part with a state of insulation and
The teeth portion is provided with a first insulator portion and a coil portion wound around the second insulator portion.
Both ends of the yoke portion in the axial direction have recesses on the outer outer peripheral surface in the radial direction.
The second insulator portion has protruding portions formed so as to project from both ends at both ends of the iron core in the axial direction.
The first insulator portion is in contact with the protruding portion of the second insulator portion, and is between the first protruding portion inserted into the recess of the iron core and the radial outer side surface of each shoe portion. It has a second protrusion portion that sandwiches the second insulator portion.
Further, the rotary electric machine disclosed in the present application includes the stator of the rotary electric machine described above and the stator of the rotary electric machine.
A frame in which the stator is arranged inside in the radial direction, and
It is provided with a rotor arranged inside the stator in the radial direction and rotatably supported by the frame.

According to the stator of the rotary electric machine and the rotary electric machine disclosed in the present application, an increase in iron loss can be prevented and the performance is improved.

It is a top view which shows the structure of the stator of the rotary electric machine according to Embodiment 1. FIG. It is a perspective view which shows the structure of the split iron core of the stator shown in FIG. 1, the first insulator part and the second insulator part. It is a perspective view which shows the structure of the split iron core and the 2nd insulator part shown in FIG. It is a perspective view which shows the structure of the 1st insulator part installed in the divided iron core shown in FIG. It is a top view which shows the structure of the 1st insulator part shown in FIG. It is a partially enlarged perspective view which shows the structure of the divided iron core, the 1st insulator part and the 2nd insulator part shown in FIG. It is a partially enlarged perspective view which shows the structure of the divided iron core shown in FIG. 2 and the first insulator part. It is a top view which shows the structure of the rotary electric machine using the stator shown in FIG. It is a perspective view which showed the manufacturing method of the stator shown in FIG. It is a perspective view which showed the manufacturing method of the stator shown in FIG. It is a perspective view which shows the other structure of the 1st insulator part of the stator of the rotary electric machine according to Embodiment 1. FIG. It is a perspective view which shows the other structure of the 1st insulator part of the stator of the rotary electric machine according to Embodiment 1. FIG. It is a partially enlarged perspective view which shows the structure of the split iron core, the 1st insulator part and the 2nd insulator part of the stator of the rotary electric machine according to Embodiment 2. FIG. It is a top view which shows the structure of the 1st insulator part installed in the divided iron core shown in FIG.

In the following description, each direction in the rotary electric machine is shown as a circumferential direction Z, and a direction along the rotation axis of the rotary electric machine is shown as an axial direction Y, a radial direction X, an outer side X1 in the radial direction X, and an inner X2 in the radial direction X, respectively. .. Therefore, in other parts such as the stator of the rotary electric machine, each direction will be described with reference to these directions.

Embodiment 1.
FIG. 1 is a top view showing the configuration of the stator 100 of the rotary electric machine 1 according to the first embodiment. FIG. 2 is a perspective view showing a configuration in which the first insulator portion 130 and the second insulator portion 120 are installed on the split iron core 110 of the stator 100 shown in FIG. FIG. 3 is a perspective view for explaining a state in which the second insulator portion 120 is installed on the divided iron core 110 shown in FIG. FIG. 4 is a perspective view showing the configuration of the first insulator unit 130 shown in FIG. FIG. 5 is a plan view showing a configuration of the first insulator unit 130 shown in FIG. 4 as viewed from the direction of arrow A.

FIG. 6 is a partially enlarged perspective view showing the upper configuration on the paper surface in the axial direction Y of the configuration in which the first insulator portion 130 and the second insulator portion 120 are installed on the divided iron core 110 shown in FIG. FIG. 7 is a partially enlarged perspective view showing a lower configuration on a paper surface in the axial direction Y of a configuration in which the first insulator portion 130 and the second insulator portion 120 are installed on the divided iron core 110 shown in FIG. In FIG. 7, the divided iron core 110 is shown in a state in which a part of the number of the divided iron cores 110 is stacked in the axial direction Y. FIG. 8 is a top view showing the configuration of the rotary electric machine 1 using the stator 100 shown in FIG. In addition, each figure other than FIG. 8 shows the state before forming the coil part 9 for convenience.

9 and 10 are perspective views showing a manufacturing method in which the first insulator portion 130 and the second insulator portion 120 are installed on the divided iron core 110 of the stator 100 shown in FIG. 11 and 12 are perspective views showing another configuration of the first insulator portion 130 of the stator 100 of the rotary electric machine 1 according to the first embodiment.

In FIG. 8, the rotary electric machine 1 is arranged on the stator 100 on which the coil portion 9 is formed, the frame 2 in which the stator 100 is arranged on the outer side X1 in the radial direction X, and the inner side X2 in the radial direction X of the stator 100. At the same time, the rotor 4 is provided with the rotary shaft 3 rotatably supported by the frame 2.

In FIG. 1, the stator 100 of the rotary electric machine 1 includes an iron core 10 and a coil portion 9 (see FIG. 8). The iron core 10 is formed on the annularly formed yoke 5 and the inner peripheral surface 11 of the inner X2 of the yoke 5 in the radial direction X so as to project toward the inner X2 in the radial direction X at a predetermined interval in the circumferential direction Z. It has a plurality of teeth portions 112. The iron core 10 is formed by arranging a plurality of divided iron cores 110 divided in the circumferential direction Z in a ring shape. The iron core 10 is formed by punching out an electromagnetic steel plate and laminating a plurality of the punched electrical steel plates in the axial direction Y.

As shown in FIG. 3, one split iron core 110 has one teeth portion 112 and one yoke portion 111. Therefore, the yoke 5 of the iron core 10 is formed in an annular shape by arranging a plurality of yoke portions 111 of the divided iron core 110 in the circumferential direction Z. Recesses 117 are formed on the outer peripheral surface 12 of the outer side X1 in the radial direction X at both ends of the yoke portion 111 in the axial direction Y. The recess 117 is formed for each of the divided iron cores 110. Further, the recess 117 may be formed continuously from one end to the other end in the axial direction Y of the outer peripheral surface 12 of the yoke portion 111 of the divided iron core 110. Further, the concave portion 117 is not limited to the shape thereof, and a hole shape having the same function as the concave portion 117 may be formed.

The tooth portion 112 has shoe portions 114 formed so as to project in the circumferential direction Z on both sides of the tip end of the inner side X2 in the radial direction X in the circumferential direction Z. A slot 113 (see FIG. 1) for forming the coil portion 9 is formed between the divided iron cores 110 adjacent to each other in the circumferential direction Z. The coil portion 9 is wound around each teeth portion 112 via a first insulator portion 130 and a second insulator portion 120, which will be described later, and is housed in a slot 113.

As shown in FIG. 3, the second insulator portion 120 has an insulating property and is formed in a sheet shape. In the teeth portion 112, the second insulator portion 120 is provided on the side surfaces 21 at both ends of the teeth portion 112 in the circumferential direction Z, on the inner peripheral surface 11 of the yoke portion 111 extending from the side surface 21, and the diameter of each shoe portion 114. It is installed on the side surface 41 of the outer side X1 of the direction X. The second insulator portion 120 may be in the form of a sheet, and is formed of, for example, an insulating paper or an insulating film. Therefore, the second insulator portion 120 is installed in the slot 113, and insulates the divided iron core 110 and the coil portion 9 in the slot 113. The second insulator portion 120 is formed so that the length in the axial direction Y is longer than the length in the axial direction of the split iron core 110, and has protrusions 121 protruding from both ends of the split iron core 110 at both ends in the axial direction Y. S.

As shown in FIG. 2, the first insulator portion 130 is installed at both ends of the divided iron core 110 in the axial direction Y, and has insulating properties. As shown in FIG. 4, the first insulator portion 130 is between the first protrusion 132 inserted into the recess 117 of the split iron core 110 and the side surface 41 of the outer side X1 of each shoe portion 114 in the radial direction X. It has a second protrusion 133 that sandwiches the second insulator 120.

As shown in FIG. 2, the first insulator portion 130 is formed so as to be in contact with the protruding portion 121 of the second insulator portion 120. In this way, the protruding portion 121 of the second insulator portion 120 comes into contact with and overlaps with the first insulator portion 130, so that the portion is formed as a portion for ensuring the electrical insulation performance. Further, the portion where the first insulator portion 130 and the second insulator portion 120 are in contact with each other in the axial direction Y is the portion of the protruding portion 121 of the second insulator portion 120, and the shape of the divided iron core 110 is not affected. Therefore, as shown in the upper figure on the paper surface of FIG. 3, the divided iron core 110 can be formed in the same shape from the upper side to the lower side in the axial direction Y.

Further, as shown in FIG. 4, in the first insulator portion 130, a groove portion 131 corresponding to the sheet-like thickness of the second insulator portion 120 is formed at a position in contact with the protruding portion 121 of the second insulator portion 120. In order to form the groove 131, the width W1 in the circumferential direction Z on the teeth portion 112 of the first insulator portion 130 (see FIG. 5) is larger than the width W2 in the circumferential direction Z of the teeth portion 112 (see FIG. 3). Twice the sheet-like thickness of the second insulator portion 120, that is, the width of the groove portion 131 is formed large.

Then, as shown in FIGS. 6 and 7, the groove portion 131 serves as a space in which the protruding portion 121 of the second insulator portion 120 is housed. In this way, the protruding portion 121 of the second insulator portion 120 fits in the groove portion 131 of the first insulator portion 130. Since both ends of the groove 131 of the first insulator 130 in the axial direction Y cover both ends of the protruding portion 121 in the axial direction Y, the second insulator 120 is prevented from being displaced in the axial direction Y. To.

Further, as shown in FIG. 7, since the first protrusion 132 of the first insulator 130 is inserted into the recess 117 of the split iron core 110, the arrangement of the first insulator 130 with respect to the split core 110 is radial X. And constrained in the circumferential direction Z.

Further, since the second protrusion 133 of the first insulator 130 sandwiches the second insulator 120 with the side surface 41 of the outer side X1 of each shoe portion 114 in the radial direction X, the second insulator with respect to the divided iron core 110 The arrangement of the portions 120 is constrained in the circumferential direction Z.

Further, in the first insulator portion 130, the first protrusion 132 is inserted into the recess 117 provided in the yoke 111 of the split iron core 110, and the second protrusion 133 is fitted so as to cover both ends of the shoe portion 114. As a result, the first insulator unit 130 is positioned with respect to the divided iron core 110.

A manufacturing method in which the first insulator section 130 and the second insulator section 120 are installed on the split iron core 110 of the stator 100 of the rotary electric machine 1 of the first embodiment configured as described above will be described with reference to FIGS. 9 and 10. To do. First, as shown in FIG. 9, jigs 125 that have attracted or gripped the second insulator portion 120 are installed on both sides of the divided iron core 110 in the circumferential direction Z (the state on the left side of the paper in FIG. 9). Then, the jig 125 is pushed so as to approach the divided iron core 110 in the circumferential direction Z so that the second insulator portion 120 is installed at a predetermined position on the divided iron core 110 (state on the right side of the paper in FIG. 9). ..

At this time, the bent portion of the second insulator portion 120 is formed from the side surface 41 of the outer side X1 of the shoe portion 114 in the radial direction X to the side surfaces of both ends of the tooth portion 112 in the circumferential direction Z, as shown in the lower figure on the paper surface of FIG. It is formed by the first curved portion 127 extending to 21, and the second curved portion 128 extending from the side surfaces 21 at both ends of the teeth portion 112 in the circumferential direction Z to the inner peripheral surface 11 of the yoke portion 111 extending to the side surface 21. To. The bending angle between the first curved portion 127 and the second curved portion 128 is set so that when the second insulator portion 120 is attached to the divided iron core 110, the bending angle is the same along each surface of the divided iron core 110 shown above. Will be done.

In order to prevent interference with the first insulator portion 130 installed in the subsequent process due to the lifting of the second insulator portion 120, the teeth portion 112, the yoke portion 111, and the shoe portion 114 of the split iron core 110 of the jig 125 are formed. The portion along the portion is formed at an angle (large) opened by 1 to 2 degrees with respect to the angle formed by the teeth portion 112 and the yoke portion 111 of the divided iron core 110, and the teeth portion 112 and the shoe portion 114.

Next, as shown in FIG. 10, the second protrusion 133 of the first insulator 130 is inserted into the notch 126 of the jig 125 from the axial direction Y, and the second insulator 120 is sandwiched and pressed. After inserting the first insulator section 130, the jig 125 of the second insulator section 120 is opened to complete the installation of the second insulator section 120 and the first insulator section 130 on the split iron core 110.

After that, the lead wire is wound around the teeth portion 112 to form the coil portion 9. Then, the plurality of divided iron cores 110 on which the coil portion 9 is formed are assembled in an annular shape to form the stator 100. Then, the rotor 4 and the stator 100 are installed in the frame 2 to form the rotary electric machine 1 (FIG. 8).

Other configurations than the example of the first insulator unit 130 shown in FIG. 4 are possible, and an example thereof will be described. As shown in FIG. 11, the first protruding portion 132 of the first insulator portion 130 may be formed with a first tapered portion 136 that becomes thinner in a direction away from the first insulator portion 130 side. When formed in this way, the insertability of the first protrusion 132 into the recess 117 of the yoke portion 111 is improved.

Further, as shown in FIG. 12, a second tapered portion 138 may be formed on the second protrusion 133 of the first insulator portion 130 so as to be tapered in a direction away from the first insulator portion 130 side. When formed in this way, interference between the second insulator portion 120 and the second projection portion 133 due to warpage or turning of the second insulator portion 120 is suppressed, and insertability is improved.

As shown above, since the first embodiment is formed, the shape of the divided iron core is changed from the circumferential width at both ends in the axial direction to the circumferential width in the middle in the axial direction, as in the conventional case. It does not need to be formed thinner than that. Therefore, according to the first embodiment, the volume of the divided iron core does not decrease, and an increase in iron loss can be prevented.

Further, according to the first embodiment, since the shape of the divided iron core can be formed in the same shape in the axial direction, the divided iron core does not have a plurality of shapes as in the conventional case, so that the mold cost and the manufacturing cost are not formed. Can be prevented from increasing. Further, unlike the conventional case, the portion corresponding to the first insulator portion is not formed extending in the slot in the axial direction. Therefore, according to the first embodiment, the space in the slot can be surely secured. , It is possible to prevent a decrease in the space factor of the coil portion.

According to the stator of the rotary electric machine of the first embodiment configured as described above,
A yoke in which at least one yoke portion is arranged in the circumferential direction and is formed in an annular shape, and
The yoke portion has a tooth portion protruding inward in the radial direction on the inner peripheral surface on the inner side in the radial direction.
The teeth portion includes an iron core having shoe portions formed so as to project in the circumferential direction on both sides in the circumferential direction of the inner tip in the radial direction.
Insulating first insulators installed at both ends in the axial direction along the central axis of the iron core,
In the teeth portion, sheets are installed on the side surfaces of both ends in the circumferential direction of the teeth portion, on the inner peripheral surface of the yoke portion extending from the side surface, and on the outer side surface in the radial direction of each shoe portion. A second insulator part with a state of insulation and
The teeth portion is provided with a first insulator portion and a coil portion wound around the second insulator portion.
Both ends of the yoke portion in the axial direction have recesses on the outer outer peripheral surface in the radial direction.
The second insulator portion has protruding portions formed so as to project from both ends at both ends of the iron core in the axial direction.
The first insulator portion is in contact with the protruding portion of the second insulator portion, and is between the first protruding portion inserted into the recess of the iron core and the radial outer side surface of each shoe portion. Since it has a second protrusion portion that sandwiches the second insulator portion, it is possible to prevent an increase in iron loss and obtain a stator with improved performance.

As described above, the slot of the iron core can be configured without intrusion of the wall surface of the first insulator portion, which reduces the space for accommodating the coil portion. Therefore, the iron core can be formed with the same size from the upper side to the lower side in the axial direction. As a result, the volume of the iron core does not decrease, the increase in iron loss can be prevented, and the performance of the rotary electric machine can be improved. This is particularly effective for models in which the axial length of the iron core is short. Further, since the resin material used for the wall surface that penetrates into the slot of the first insulator portion becomes unnecessary, it is effective in reducing the material cost.

Further, since the first protruding portion of the first insulator portion is formed with a first tapered portion that becomes thinner in the direction away from the first insulator portion side, the first protruding portion may be recessed in the yoke portion. It is possible to obtain a stator with improved insertability, excellent position accuracy and assembly accuracy, and excellent workability.

Further, since the second protruding portion of the first insulator portion is formed with a second tapered portion that becomes thinner in the direction away from the first insulator portion side, the second insulator portion and the second protruding portion are combined. Interference is suppressed, warping or turning of the second insulator portion is prevented, insertability is improved, and a stator having excellent workability can be obtained.

Further, in the first insulator portion, a groove portion having a sheet-like thickness of the second insulator portion is formed at a position in contact with the protruding portion of the second insulator portion, so that the axial direction of the second insulator portion is formed. It is possible to obtain a stator that can prevent slippage.

Further, the iron core is formed of divided iron cores that are divided into a plurality of pieces in the circumferential direction.
The recesses are formed in each of the divided iron cores.
Since the first protrusions to be inserted into the recesses are formed in the first insulators, a stator capable of holding the first insulators for each divided iron core can be obtained.

In addition, the stator of the rotary electric machine described above and
A frame in which the stator is arranged inside in the radial direction, and
Since the stator is arranged inside the stator in the radial direction and the rotor is rotatably supported by the frame, a stator having excellent performance can be obtained, and a rotary electric machine having excellent performance can be obtained. Obtainable.

Embodiment 2.
FIG. 13 is a partially enlarged perspective view showing a configuration on the upper side in the axial direction Y of a configuration in which the first insulator portion 130 and the second insulator portion 120 are installed on the split iron core 110 of the stator 100 of the rotary electric machine 1 according to the second embodiment. Is. FIG. 14 is a plan view showing the configuration of the first insulator unit 130 installed in the divided iron core 110 shown in FIG. In the figure, the same parts as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

In the first embodiment, an example in which the groove portion 131 is formed in the first insulator portion 130 that houses the protruding portion 121 of the second insulator portion 120 is shown, but in the second embodiment, the example in which the groove portion 131 is not formed is shown. Will be described. The width W3 in the circumferential direction Z on the teeth portion 112 of the first insulator portion 130 (see FIG. 14) is formed to have the same width as the width W2 (see FIG. 3) in the circumferential direction Z of the teeth portion 112. However, a groove 131 for sandwiching the second insulator portion 120 is formed on the inner side X2 of the second protrusion 133 in the radial direction X.

According to the second embodiment, the second insulator portion 120, the first insulator portion 130, and the split iron core 110 are fixed by an adhesive, double-sided tape, or the like. Since other shapes and the manufacturing method are the same as those in the first embodiment, the description thereof will be omitted.

According to the stator of the rotary electric machine of the second embodiment configured as described above, it goes without saying that the same effect as that of the first embodiment is obtained, and the first insulator portion is on the teeth portion. Since the width in the circumferential direction is formed to be the same as the width in the circumferential direction of the teeth portion, the groove portion is not formed in the first insulator portion, so that the shape of the first insulator portion can be simplified and the mold cost. Can be reduced.

Although the present disclosure describes various exemplary embodiments and examples, the various features, embodiments, and functions described in one or more embodiments are those of a particular embodiment. It is not limited to application, but can be applied to embodiments alone or in various combinations.
Therefore, innumerable variations not illustrated are envisioned within the scope of the techniques disclosed herein. For example, it is assumed that at least one component is modified, added or omitted, and further, at least one component is extracted and combined with the components of other embodiments.

1 Rotating machine, 2 frames, 3 rotating shafts, 4 rotors, 5 yokes, 9 coils, 10 iron cores, 11 inner peripheral surfaces, 12 outer peripheral surfaces, 21 side surfaces, 41 side surfaces, 100 stators, 110 split iron cores, 111 yokes Part, 112 Teeth part, 113 slot, 114 shoe part, 117 recess, 120 second insulator part, 121 protrusion, 125 jig, 126 notch, 130 first insulator part, 131 groove part, 132 first protrusion part, 133 Second protrusion, 136 First taper, 138 Second taper, W1 width, W2 width, W3 width, X radial direction, X1 outside, X2 inside, Y-axis direction, Z-circumferential direction.

The stator of the rotary electric machine disclosed in the present application is
A yoke in which at least one yoke portion is arranged in the circumferential direction and is formed in an annular shape, and
The yoke portion has a tooth portion protruding inward in the radial direction on the inner peripheral surface on the inner side in the radial direction.
The teeth portion includes an iron core having shoe portions formed so as to project in the circumferential direction on both sides in the circumferential direction of the inner tip in the radial direction.
Insulating first insulators installed at both ends in the axial direction along the central axis of the iron core,
In the teeth portion, sheets are installed on the side surfaces of both ends in the circumferential direction of the teeth portion, on the inner peripheral surface of the yoke portion extending from the side surface, and on the outer side surface in the radial direction of each shoe portion. A second insulator part with a state of insulation and
The teeth portion is provided with a first insulator portion and a coil portion wound around the second insulator portion.
Both ends of the yoke portion in the axial direction have recesses on the outer outer peripheral surface in the radial direction.
The second insulator portion has protruding portions formed so as to project from both ends at both ends of the iron core in the axial direction.
The first insulator portion is in contact with the protruding portion of the second insulator portion, and is between the first protruding portion inserted into the recess of the iron core and the radial outer side surface of each shoe portion. and a second projecting portion sandwiching the second insulator portion in,
The first insulator portion is provided at a position where the second insulator portion installed on the side surfaces of both ends in the circumferential direction of the teeth portion is in contact with the protruding portion formed so as to project from both ends in the axial direction of the iron core. Grooves are formed at both ends of the protruding portion of the second insulator portion in the axial direction so as to cover both ends in the axial direction .
Further, the rotary electric machine disclosed in the present application includes the stator of the rotary electric machine described above and the stator of the rotary electric machine.
A frame in which the stator is arranged inside in the radial direction, and
It is provided with a rotor arranged inside the stator in the radial direction and rotatably supported by the frame.

Claims (6)

A yoke in which at least one yoke portion is arranged in the circumferential direction and is formed in an annular shape, and
The yoke portion has a tooth portion protruding inward in the radial direction on the inner peripheral surface on the inner side in the radial direction.
The teeth portion includes an iron core having shoe portions formed so as to project in the circumferential direction on both sides in the circumferential direction of the inner tip in the radial direction.
Insulating first insulators installed at both ends in the axial direction along the central axis of the iron core,
In the teeth portion, sheets are installed on the side surfaces of both ends in the circumferential direction of the teeth portion, on the inner peripheral surface of the yoke portion extending from the side surface, and on the outer side surface in the radial direction of each shoe portion. A second insulator part with a state of insulation and
The teeth portion is provided with a first insulator portion and a coil portion wound around the second insulator portion.
Both ends of the yoke portion in the axial direction have recesses on the outer outer peripheral surface in the radial direction.
The second insulator portion has protruding portions formed so as to project from both ends at both ends of the iron core in the axial direction.
The first insulator portion is in contact with the protruding portion of the second insulator portion, and is between the first protruding portion inserted into the recess of the iron core and the radial outer side surface of each shoe portion. A stator of a rotary electric machine having a second protrusion portion sandwiching the second insulator portion. The stator of the rotary electric machine according to claim 1, wherein the first protrusion of the first insulator portion is formed with a first tapered portion that becomes thinner in a direction away from the first insulator portion. The stator of the rotary electric machine according to claim 1 or 2, wherein the second protrusion of the first insulator portion is formed with a second tapered portion that becomes thinner in a direction away from the first insulator portion. Any one of claims 1 to 3 in which the first insulator portion is formed with a groove portion having a sheet-like thickness of the second insulator portion at a position in contact with the protruding portion of the second insulator portion. The stator of the rotary electric machine described in the section. The first insulator portion according to any one of claims 1 to 3, wherein the width of the first insulator portion in the circumferential direction on the teeth portion is the same as the width of the teeth portion in the circumferential direction. Stator of rotary electric machine. The stator of the rotary electric machine according to any one of claims 1 to 5,
A frame in which the stator is arranged inside in the radial direction, and
A rotary electric machine having a rotor arranged inside the stator in the radial direction and rotatably supported by the frame.

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