JP2007143354A - Armature - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the withstand voltage between in-phase coils that had been overlooked conventionally. <P>SOLUTION: An insulation paper 101 has a narrow portion 231 and a wide portion 232 connected to the narrow portion 231. The wide portion 232 is bent at a valley-fold line 233. The narrow portion 231 is inserted into a slot of an armature. Since the wide portion 232 is bent at the valley-fold line 233, as described above, the portion 232 covers the armature coils. That is, the wide portion 232 is interposed between the coil ends of a pair of the armature coils, each being wound in a pair of adjacent slots and in which the currents of the same phase flow. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an armature, and more particularly, to insulation between armature coils provided therein.

  An armature of a rotating electrical machine has a plurality of slots, and an armature coil is wound around the slots. In the design of rotating electrical machines with high operating voltage, the number of armature slots is increased by increasing the number of armature slots, thereby reducing the voltage that is shared and supported by each coil. It was possible.

  Also, resistance loss can be reduced by increasing the amount of armature coil used as a means for increasing the efficiency of a rotating electrical machine. This increases the volume of the armature coil (so-called “coil end”) coming out of the slot. In order to reduce the size of the rotating electrical machine, the coil end of the armature coil is compressed by the mechanical molding process as much as possible.

  Usually, a thin insulator commonly called “insulating paper” (not necessarily limited to one formed from paper) is interposed between the armature coils of different phases. This is because different-phase armature coils are adjacent to each other in the radial direction of the armature, and different potentials are applied between them, and there is a need to increase the withstand voltage against high voltage generated between the armature coils. It is.

  FIG. 15 is a perspective view illustrating the positions of the in-phase armature coils 61 and 62. Normally, the armature coils 61 and 62 are often composed of a plurality of windings. However, for simplicity of illustration, the armature coils 61 and 62 are roughly outlined in all drawings. Of the slots 11 provided in the armature core 1, the adjacent slots 11 are wound with adjacent in-phase armature coils 61 and 62. The armature coils 61 and 62 are wrapped by the insulating paper 2 in the slot from the bottom 111 and side wall 112 side of the slot 11 and the wedge 3 from the opening 113 side of the slot 11, respectively. The in-slot insulating paper 2 has a cuff part 21.

  In addition, about the arrangement | positioning of the insulating paper between the armature coils of different phases, it is illustrated by the following patent document, for example.

Japanese Patent No. 3652677 JP-A-5-122910 JP 7-298530 A JP-A-8-275425 JP 2004-260956 A JP 2004-364382 A JP 2004-364449 A JP 2005-110417 A JP 2004-289930 A

  On the other hand, no insulating paper was arranged between the in-phase armature coils. This is because (i) not so much voltage was applied between the in-phase armature coils, and (ii) the in-phase armature coils are not adjacent in the radial direction of the armature, unlike the out-of-phase armature coils. (Iii) Even if armature coils of the same phase are adjacent in the circumferential direction of the armature, it is considered that the main reason is that it is difficult to fix the insulating paper to the adjacent portion in the winding assembly process.

  However, due to the recent trend, the operating voltage of the rotating electrical machine increases, and the voltage shared by one armature coil tends to increase as compared with the conventional one. When the rotating electric machine is driven by a power source using a switching element such as an inverter, a surge voltage having an extremely short wavefront length enters the armature coil. This further increases the voltage sharing of the winding start coil of each phase armature coil.

  When distributed winding is performed using a round wire as an armature coil, the armature coil is usually wound by random winding using a winding frame and then inserted into a slot of the armature core. In this case, the winding start of the armature coil exists on the inner diameter side of the winding frame, and the winding end is located on the outer peripheral side of the armature coil. That is, usually, in one of the armature coils, there is almost no mechanical contact between the winding start and the winding end. For this reason, although the armature coils are in contact with each other inside one armature coil, the withstand voltage between them does not become a problem.

  However, considering the armature coils arranged in adjacent slots, the end of winding of any armature coil is located on the outer peripheral side of the armature coil. Therefore, even if a current of the same phase flows between the armature coils, a voltage shared by one armature coil is applied between the coil ends. The same applies to the case where the armature coil is wound with aligned winding.

  Further, even if they are not adjacent along the radial direction of the armature, they are adjacent in the circumferential direction, and therefore, by reducing the size of the armature, the distance at which the in-phase coil ends are adjacent is shortened. As the volume of the coil end increases as described above, the insulation distance between armature coils through which in-phase current flows (hereinafter also referred to as “in-phase armature coils” for simplicity) is shortened. Further, mechanical stress is given by a molding process for compressing the coil end. Under such circumstances, it is important to prevent dielectric breakdown between adjacent in-phase armature coils.

  FIG. 16 is a perspective view showing a state in which the armature coils 61 and 62 are very close to each other and come into contact with each other due to the miniaturization of the armature core 1. When the armature coils 61 and 62 are in contact with each other in this manner, a dielectric breakdown occurs unless a large voltage can be supported only by an insulating film such as enamel (for example, 30 μm thick) applied to the surface of the coil itself.

  FIG. 17 is a circuit diagram showing the star connection (number of parallel circuits 1) of the armature coil for three-phase hexapole. When the power supply voltage is an effective value of 400 V, the voltage shared by one coil is an effective value of about 38.5 V (= 400 / √3). Therefore, the voltage between the winding start coil (power supply side coil) and the winding end coil (neutral point side coil) of the armature is considered to be that the coil ends of each coil are in contact with each other, and the effective value is 192.5 V (= 400 / √3 × 5/6).

  FIG. 18 is a circuit diagram showing delta connection (number of parallel circuits 1) of armature coils for three-phase hexapoles. Considering the same as in the case of star connection, when the power supply voltage has an effective value of 400V, it is assumed that the coil ends of the armature winding start coil and the winding end coil are in contact with each other, and the effective value 333V (= 400 × 5). / 6), the voltage to withstand is higher than in the case of star connection.

  The above-mentioned voltage is obtained by calculation using a commercial power source. However, the above-described surge voltage is applied to a rotating electrical machine driven by an inverter with switching. In that case, the voltage to withstand will rise further.

  In view of this, an object of the present invention is to provide a technique for increasing the withstand voltage between in-phase coils, which has been conventionally overlooked.

  In a first aspect of the armature according to the present invention, a core (1) having a plurality of slots (11) around which an armature coil (61, 62) is wound, and a pair of adjacent slots (11) Insulating paper (101; 201, 202; 301, 302; 401; 52) disposed between the coil ends of the pair of armature coils (61, 62) that are respectively wound and through which an in-phase current flows. Prepare.

  A second aspect of the armature according to the present invention is the first aspect of the armature, wherein the insulating paper (101) includes a narrow portion (231) inserted into the slot (11), and the width. A wide portion (232) that is connected to the narrow portion (231) and covers one (61) of the pair of armature coils.

  A third aspect of the armature according to the present invention is the first aspect of the armature, wherein the slot (11) has an opening (113) that opens in a direction orthogonal to the extending direction. Further, the insulating paper (201) is inside the slot (11) and on the side opposite to the opening, and in-slot insulating portions (22, 24) covering one (62) of the pair of armature coils. ) And a cover portion (23) that is connected to the in-slot insulating portion and covers the one of the armature coils outside the slot.

  A fourth aspect of the armature according to the present invention is the third aspect of the armature, wherein the cover (23) is provided at both ends of the in-slot insulating portions (22, 24).

  A fifth aspect of the armature according to the present invention is the fourth aspect of the armature, wherein both ends of the in-slot insulating portions (22, 24) are bent out of the slot (11). The cuff part (21) to be provided is further provided.

  A sixth aspect of the armature according to the present invention is the first aspect of the armature, wherein the slot (11) has an opening (113) that opens in a direction orthogonal to the extending direction. The insulating paper (301) is connected to the wedge portion (31, 32, 34) covering one of the armature coils (62) on the opening side of the slot (11) and the wedge portion. And a cover (33) covering the one of the armature coils.

  A seventh aspect of the armature according to the present invention is the sixth aspect of the armature, wherein the slot (11) further includes a pair of side walls (112) on the side where the slot is arranged. The wedge portions include a pair of side wall wedge portions (32, 34) covering the one side (62) of the armature coil with respect to each of the pair of side wall (112), and the pair of side wall side wedge portions. And an opening side wedge portion (31) that covers the one side (62) of the armature coil at the opening portion (113). The cover (33) is provided on one of the pair of side wall wedges (32, 34).

  An eighth aspect of the armature according to the present invention is the sixth aspect or the seventh aspect of the armature, wherein the covering portion (33) is provided at both ends of the wedge portion (31, 32, 24). It is done.

  A ninth aspect of the armature according to the present invention is the eighth aspect of the armature, wherein both ends of the wedge portion (31, 32, 34) protrude from the slot (11) and bend. The cuff part (21) to be provided is further provided.

  A tenth aspect of the armature according to the present invention is the fifth aspect or the ninth aspect of the armature, wherein an angle of entry of the boundary between the cover (23, 33) and the other portion is set. Has holes (20, 30).

  An eleventh aspect of the armature according to the present invention is the first aspect of the armature, wherein the insulating paper (401) includes the different-phase insulating portion (43) for insulating the armature coil having different phases, It has a common-phase insulating part (42) branched from the middle of the different-phase insulating part and disposed between the coil ends of the pair of armature coils (61, 62).

  A twelfth aspect of the armature according to the present invention is the eleventh aspect of the armature, wherein the in-phase insulating portion (42) and the different-phase insulating portion (43) are made of a continuous insulating paper material. . In addition, valley folds (44), mountain folds, and valley folds (44) are formed at predetermined intervals in the insulating paper material, and a pair of the valley folds are joined together to project the mountain folds. The in-phase insulating portion is formed between the joint location (45) where the joining is performed and the mountain fold, and the hetero-phase insulating portion is formed on the opposite side of the in-phase insulating portion with respect to the joining location.

  A thirteenth aspect of the armature according to the present invention is the first aspect of the armature, wherein the insulating paper (52) insulates the armature coil of a different phase and has an end portion (52a) thereof. The armature coils (61, 62) are disposed between the coil ends of the pair of armature coils (61, 62).

  A fourteenth aspect of the armature according to the present invention is the thirteenth aspect of the armature, wherein the end (52a) of the insulating paper (52) is one of the pair of armature coils (62). Cover the coil end.

  A fifteenth aspect of the armature according to the present invention is the thirteenth aspect of the armature, wherein an end (52a) of the insulating paper (52) is one of the pair of armature coils (62). Extends from the outer peripheral side (or inner peripheral side) of the coil end to the inner peripheral side (or outer peripheral side) of the coil end of the other (61) of the pair of armature coils.

  According to the first aspect of the armature according to the present invention, the withstand voltage between the in-phase armature coils, which has been conventionally overlooked, is increased.

  According to the second aspect of the armature according to the present invention, the wide portion is interposed between the coil ends of the pair of armature coils that are respectively wound in a pair of adjacent slots and through which an in-phase current flows. Deploy.

  According to the third aspect of the armature according to the present invention, the cover is interposed between the coil ends of the pair of armature coils that are respectively wound in the pair of adjacent slots and through which an in-phase current flows. Deploy.

  According to the fourth aspect of the armature of the present invention, the withstand voltage between the coil ends of the armature coil in which the current of the same phase flows is prevented while preventing the insulating paper from moving along the direction in which the slot extends. Is improved at both ends of the armature.

  According to the fifth aspect of the armature of the present invention, the effect of preventing the insulating paper from moving along the direction in which the slot extends is enhanced.

  According to the sixth aspect of the armature according to the present invention, the cover is interposed between the coil ends of the pair of armature coils that are respectively wound in a pair of adjacent slots and through which an in-phase current flows. Deploy.

  According to the seventh aspect of the armature of the present invention, the cover portion is provided so as to protrude from the side wall of the slot.

  According to the eighth aspect of the armature of the present invention, the withstand voltage between the coil ends of the armature coil in which the current of the same phase flows while preventing the insulating paper from moving along the direction in which the slot extends. Is improved at both ends of the armature.

  According to the ninth aspect of the armature of the present invention, the effect of preventing the insulating paper from moving along the direction in which the slot extends is enhanced.

  According to the tenth aspect of the armature according to the present invention, the stress generated between the cover portion and the other portion is relaxed to prevent breakage such as generation of a crack.

  According to the eleventh aspect of the armature according to the present invention, the armature coils of the same phase are also insulated from each other while the armature coils of different phases are insulated from each other.

  According to the twelfth aspect of the armature according to the present invention, it is possible to easily obtain the insulating paper that insulates the armature coils of different phases and the armature coils of the same phase.

  According to the thirteenth aspect, the fourteenth aspect, and the fifteenth aspect of the armature according to the present invention, the armature coils in the same phase are also insulated from each other while the armature coils in the different phases are insulated from each other.

First embodiment.
FIG. 1 is a plan view showing an insulating paper 101 according to the first embodiment. The insulating paper 101 has a narrow part 231 and a wide part 232 connected to the narrow part 231. The wide portion 232 is bent at the valley fold line 233.

  FIG. 2 is a perspective view showing the structure of the armature provided with the insulating paper 101. The armature core 1 is provided with a plurality of slots 11, and in-phase armature coils 61 and 62 are respectively wound around two adjacent slots 11.

  The armature coils 61 and 62 are wrapped by the insulating paper 2 in the slot from the bottom 111 and side wall 112 side of the slot 11. Further, the narrow portion 231 (FIG. 1) is inserted into the slot 11, for example, at the bottom 111 thereof. Further, since the wide portion 232 is bent at the valley fold line 233 as described above, the wide portion 232 covers the armature coil 61.

  That is, the wide portion 232 is disposed between the coil ends of the pair of armature coils 61 and 62 that are respectively wound in the pair of adjacent slots 11 and through which an in-phase current flows. Further, with the intervention of the wide portion 232, the withstand voltage between the in-phase armature coils 61 and 62, which has been conventionally overlooked, is increased.

  The slot 11 has an opening 113 on one radial surface 12 (inner peripheral surface in the figure) of the core 1. In other words, the slot 11 extends in one direction in the core 1, and an opening 113 is opened in a direction orthogonal to the extending direction. The armature coils 61 and 62 are covered with the wedge 3 from the opening 113 side.

  The in-slot insulating paper 2 has a cuff part 21. The cuff part 21 has the insulating paper 2 in the slot on the coil end side (not shown) opposite to the illustrated coil end. In order to prevent the in-slot insulating paper 2 from moving along the slot 11, the cuff portion 21 is bent out of the slot 11 and is in contact with the core 1. On the other hand, the narrow width portion 231 of the insulating paper 1 is inserted into the slot 11 and comes into contact with the core 1, but has a wide portion 232 that covers the armature coil 61 without coming into contact with the core 1.

  Thus, if the armature coil 61 is covered with the wide portion 232, the armature coil 62 need not be covered with the wide portion 232. That is, the insulating paper 101 is not necessary for all of the slots 11, and it is sufficient if the insulating paper 101 is disposed for half of the slots.

Second embodiment.
3 and 4 are a plan view and a perspective view, respectively, showing an insulating paper 201 according to the second embodiment. The insulating paper 201 has an in-slot insulating portion 22 and a cover portion 23 connected to the in-slot insulating portions 22 and 24. The in-slot insulating portions 22 and 24 are bent at the valley fold line 25.

  FIG. 5 is a perspective view showing the structure of the armature provided with the insulating paper 201. The in-slot insulating portions 22 and 24 (FIG. 3) are inserted into the slot 11. The armature coil 62 is covered with the inside of the slot 11 on the side opposite to the opening 113 (that is, on the bottom 111 side, preferably also on the side wall 112 side). The cover 23 covers the armature coil 62 outside the slot 11. Similar to the first embodiment, when the armature coil 62 is covered with the cover 23, the armature coil 61 need not be covered with the cover 23. Therefore, the insulating paper 201 is not necessary for all of the slots 11, and it is sufficient if the insulating paper 201 is disposed for half of the slots. In the slot 11 where the insulating paper 201 is not provided, the in-slot insulating paper 2 is inserted. In both the slot 11 where the insulating paper 201 is provided and the slot 11 where the in-slot insulating paper 2 is provided, the armature coil can be covered with the wedge 3 from the opening 113 side.

  In this way, the cover is disposed between the coil ends of the pair of armature coils 61 and 62 that are respectively wound in the pair of adjacent slots 11 and through which the in-phase current flows. Therefore, similarly to the first embodiment, the withstand voltage between the in-phase armature coils, which has been conventionally overlooked, is increased.

  The cover 23 is desirably provided at both ends of the in-slot insulating portions 22 and 24. In this case, the insulating paper 201 can be prevented from moving along the direction in which the slot extends, and the withstand voltage between the coil ends of the armature coils 61 and 62 is improved at both ends of the armature.

  Also, as shown in FIGS. 3 and 4, it is desirable to provide the cuff part 21 at both ends of the in-slot insulating part 24. The cuff part 21 and the in-slot insulating part 24 are bent at the boundary 26. This boundary 26 appears as a mountain fold line in FIG. 3, and as a valley fold line in FIG.

Third embodiment.
6 and 7 are a plan view and a perspective view, respectively, showing an insulating paper 301 according to the third embodiment. The insulating paper 301 has wedge portions 31, 32, and 34 and a cover portion 33.

  The wedge parts 31, 32, 34 cover the armature coil on the opening 113 side. The cover portion 33 is connected to the wedge portions 31, 32, and 34 to cover the armature coil.

  More specifically, the wedge portions 31, 32, and 34 are divided into an opening-side wedge portion 31 and side wall-side wedge portions 32 and 34. The opening-side wedge portion 31 and the sidewall-side wedge portion 32 are bent at a valley fold line 35, and the opening-side wedge portion 31 and the sidewall-side wedge portion 34 are bent at a valley fold line 36.

  FIG. 8 is a perspective view showing the structure of the armature provided with the insulating paper 301. The armature coil 62 is covered inside the opening-side wedge portion 31 slot 11 and on the opening 113 side. Although not shown in FIG. 8, the side wall side wedge portions 32 and 34 cover the armature coil 62 inside the slot 11 and on the side wall 112 side.

  By providing the insulating paper 301, the cover portion 33 is disposed between the coil ends of the armature coils 61 and 62. Therefore, as in the first and second embodiments, the withstand voltage between the in-phase armature coils, which has been conventionally overlooked, is increased.

  Since the cover 33 is provided so as to protrude from the side wall of the slot, the withstand voltage of the armature coils 61 and 62 is improved at both ends of the armature while preventing the insulating paper 301 from moving along the direction in which the slot 11 extends. To do.

  Similarly to the insulating papers 101 and 201, the insulating paper 301 is not necessary for all of the slots 11, and it is sufficient if the insulating paper 301 is arranged for half of the paper. A wedge 3 is provided in the slot 11 where the insulating paper 301 is not disposed. The slot insulating paper 2 can be arranged in both the slot 11 in which the insulating paper 301 is arranged and the slot 11 in which the wedge 3 is arranged.

Fourth embodiment.
FIG. 9 is a plan view showing an insulating paper 202 according to the fourth embodiment. The insulating paper 202 has a structure in which a hole 20 is formed at an entrance angle between the cover portion 23 of the insulating paper 201 and other portions (the cuff portion 21 and the in-slot insulating portions 22 and 24).

  FIG. 10 is a plan view showing an insulating paper 302 according to the fourth embodiment. The insulating paper 302 has a structure in which a hole 30 is formed at an entrance angle of the boundary between the covering portion 33 of the insulating paper 301 and other portions (opening wedge portion 31 and side wall wedge portion 32).

  By providing the holes 20 and 30 in this way, stress generated between the cover portion and the other portions is relieved, and damage such as generation of cracks is prevented.

Fifth embodiment.
FIG. 11 is a plan view showing an insulating paper 401 according to the fifth embodiment. The insulating paper 401 includes a different-phase insulating portion 43 and a common-phase insulating portion 42 that branches from the middle of the different-phase insulating portion 43.

  FIG. 12 is a perspective view showing the structure of the armature provided with the insulating paper 401. An in-phase insulating portion 42 is interposed between the in-phase armature coils 61 and 62. The in-phase insulating portion 42 is disposed between the armature coils 61 and 62 wound adjacently, away from the core 1 and blocking the circumferential direction. On the other hand, the different-phase insulating part 43 extends along the circumferential direction so as to insulate the different-phase armature coil (not shown).

  By using the insulating paper 401 in this way, it is possible to insulate the armature coils of the same phase while insulating the armature coils of different phases.

  For example, the in-phase insulating part 42 and the different-phase insulating part 43 can be made of a continuous insulating paper material. A valley fold, a mountain fold, and a valley fold are formed in this insulating paper material at predetermined intervals, and a pair of valley folds is joined to project the mountain fold. In FIG. 11, the valley fold is shown as a valley fold line 44, and the joined position is shown as a joint location 45.

  An in-phase insulating portion 42 is formed between the protruding mountain fold and the joint portion 45, and a different-phase insulating portion 43 is formed on the opposite side of the joint portion 45 from the in-phase insulating portion 42.

  By such formation, the insulating paper 401 that insulates both the armature coils of different phases and the armature coils of the same phase can be easily obtained.

  Desirably, as shown in FIG. 11, it is desirable to provide the heterogeneous insulating portions 43 as a pair and connect them with a connecting portion 41. By disposing the connecting portion 41 through the slot 11, it is possible to prevent the displacement of the in-phase insulating portion 42 and the different-phase insulating portion 43.

Sixth embodiment.
13 and 14 are perspective views showing the structure of the armature provided with the insulating paper 52 according to the sixth embodiment. The insulating paper 52 extends in the circumferential direction and insulates the armature coils having different phases in the radial direction, and the end 52 a is disposed between the coil ends of the armature coils 61 and 62.

  FIG. 13 illustrates a mode in which the end 52 a covers the coil end of the armature coil 62. In FIG. 14, the end 52 a is illustrated as extending from the outer peripheral side of the coil end of the armature coil 62 to the inner peripheral side of the coil end of the armature coil 61. The end 52 a may extend from the inner peripheral side of the coil end of the armature coil 62 to the outer peripheral side of the coil end of the armature coil 61.

  Also in the present embodiment, as in the fifth embodiment, the armature coils of the same phase are insulated from each other while the armature coils of different phases are insulated from each other.

  The armature described above constitutes a rotating electric machine together with the field element.

It is a top view which shows the insulating paper concerning the 1st Embodiment of this invention. It is a perspective view which shows the structure of the armature provided with the insulating paper concerning the 1st Embodiment of this invention. It is a top view which shows the insulating paper concerning the 2nd Embodiment of this invention. It is a perspective view which shows the insulating paper concerning the 2nd Embodiment of this invention. It is a perspective view which shows the structure of the armature provided with the insulating paper concerning the 2nd Embodiment of this invention. It is a top view which shows the insulating paper concerning the 3rd Embodiment of this invention. It is a perspective view which shows the insulating paper concerning the 3rd Embodiment of this invention. It is a perspective view which shows the structure of the armature provided with the insulating paper concerning the 3rd Embodiment of this invention. It is a top view which shows the insulating paper concerning the 4th Embodiment of this invention. It is a top view which shows the insulating paper concerning the 4th Embodiment of this invention. It is a top view which shows the insulating paper concerning the 5th Embodiment of this invention. It is a perspective view which shows the structure of the armature provided with the insulating paper concerning the 5th Embodiment of this invention. It is a perspective view which shows the structure of the armature provided with the insulating paper concerning the 6th Embodiment of this invention. It is a perspective view which shows the structure of the armature provided with the insulating paper concerning the 6th Embodiment of this invention. It is a perspective view which illustrates the prior art. It is a perspective view which shows the problem overlooked by the prior art. It is a circuit diagram which shows the star connection of an armature coil. It is a circuit diagram which shows the delta connection of an armature coil.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Core 2 Insulation paper in a slot 3 Wedge 11 Slot 20, 30 hole 21 Cuff part 22, 24 Insulation part 23, 33 in a slot 31 Cover side wedge part 32, 34 Side wall side wedge part 44 Valley folding line 45 Joint location 52 , 101, 201, 301, 401 Insulating paper 61, 62 Armature coil 52a End 113 Opening 231 Narrow part 232 Wide part

Claims (16)

A core (1) having a plurality of slots (11) around which armature coils (61, 62) are wound;
Insulating paper (101; 201, 202; disposed between the coil ends of the pair of armature coils (61, 62) that are respectively wound in a pair of adjacent slots (11) and through which an in-phase current flows. 301, 302; 401; 52). The insulating paper (101) is
A narrow portion (231) inserted into the slot (11);
The armature according to claim 1, further comprising: a wide portion (232) connected to the narrow portion (231) and covering one of the pair of armature coils (61). The slot (11) has an opening (113) that opens in a direction perpendicular to its extending direction;
The insulating paper (201)
In-slot insulating portions (22, 24) covering one side (62) of the pair of armature coils inside the slot (11) on the side opposite to the opening,
2. The armature according to claim 1, further comprising: a covering portion connected to the in-slot insulating portion and covering the one of the armature coils outside the slot.   The armature according to claim 3, wherein the cover (23) is provided at both ends of the in-slot insulating portion (22, 24).   5. The armature according to claim 4, further comprising cuff portions (21) that protrude outward from the slot (11) and are bent at both ends of the in-slot insulating portions (22, 24). The slot (11) has an opening (113) that opens in a direction perpendicular to its extending direction;
The insulating paper (301)
A wedge portion (31, 32, 34) covering one of the pair of armature coils (62) on the opening side of the slot (11);
The armature according to claim 1, further comprising a cover (33) connected to the wedge portion and covering the one of the armature coils. The slot (11) further includes a pair of side walls (112) on a side where the slot is arranged,
The wedge portion is
A pair of side wall-side wedge portions (32, 34) covering the one side (62) of the armature coil with respect to each of the pair of side walls (112);
An opening side wedge part (31) provided between the pair of side wall side wedge parts and covering the one side (62) of the armature coil in the opening part (113);
The armature according to claim 6, wherein the covering portion (33) is provided on one of the pair of side wall wedge portions (32, 34).   The armature according to claim 6 or 7, wherein the covering portion (33) is provided at both ends of the wedge portion (31, 32, 24).   The armature according to claim 8, further comprising cuff portions (21) protruding from the outside of the slot (11) and bent at both ends of the wedge portion (31, 32, 34).   The armature according to claim 5 or 9, wherein a hole (20, 30) is provided at an entrance angle of a boundary between the cover (23, 33) and the other part. The insulating paper (401) includes a different-phase insulating portion (43) for insulating the armature coils of different phases;
The in-phase insulation part (42) branched from the middle of the different-phase insulation part and having an in-phase insulation part (42) disposed between the coil ends of the pair of armature coils (61, 62). Armature. The in-phase insulating portion (42) and the different-phase insulating portion (43) are composed of a continuous insulating paper material,
A valley fold (44), a mountain fold, a valley fold (44) are formed at a predetermined interval in the insulating paper material, a pair of the valley folds are joined together, and the mountain fold projects.
12. The in-phase insulating portion is formed between a joining location (45) where the joining is performed and the mountain fold, and the different-phase insulating portion is formed on the opposite side of the in-phase insulating portion with respect to the joining location. Armature described.   The insulating paper (52) insulates the armature coils of different phases, and the end (52a) is disposed between the coil ends of the pair of armature coils (61, 62). The armature according to claim 1.   The armature according to claim 13, wherein an end (52a) of the insulating paper (52) covers a coil end of one (62) of the pair of armature coils.   An end portion (52a) of the insulating paper (52) extends from the outer peripheral side of one end (62) of the pair of armature coils to the other end (61) of the pair of armature coils. The armature according to claim 13, which extends to the inner peripheral side. The end portion (52a) of the insulating paper (52) is arranged from the inner peripheral side of one end (62) of the pair of armature coils to the other end (61) of the pair of armature coils. The armature according to claim 13, which extends to the outer peripheral side of the armature.

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