JP5255904B2 - Armature and rotating machine - Google Patents

Description

  The present invention relates to an armature and a rotating electric machine.

  In the armature of a rotating electric machine, a conductive wire is wound around an armature core to form a winding. Such windings to the armature core include concentrated winding in which windings are formed on each of the teeth of the armature core, and lap winding in which windings are formed in a bridge shape across two teeth (multiple windings) (Pole winding) or the like, and is appropriately selected from each design (for example, see Patent Documents 1 and 2).

JP 2003-061287 A JP 2007-043831 A

  However, when the winding is formed in a bridge shape across each tooth of the armature core as in Patent Document 1, as shown in FIGS. 5 and 6, the winding 126 on the inner diameter side located in the lower layer is positioned in the upper layer. Since the winding 128 on the outer diameter side is wound in a state where it overlaps with the tooth portion 116, the height of the crossover portion (coil end portion) becomes higher with respect to the axial direction. Further, since the windings overlap in a complicated manner, the wire occupancy ratio in the winding space of the armature core 112 remains at about 50%. In particular, when the winding is wound by random winding, the overlapping of the windings is random, causing unbalance of the armature 112 and an increase in the amount of winding material used.

In view of the above problems, an object of the present invention is to provide an armature and a rotating electric machine that can reduce the height of a coil end portion and reduce unbalance of the armature.
Another object of the present invention is to provide an armature capable of improving the wire occupying ratio in the winding space of the armature core and reducing the amount of the winding material used without impairing the magnetic characteristics. It is to be.

According to the armature according to claim 1, the problem is that the armature core having a plurality of radially extending tooth portions and the winding wound in a bridge shape between the plurality of tooth portions of the armature core. The tooth portion includes groove portions formed on both end sides in the axial direction of the armature, and the winding is provided on an inner diameter side wound around the inner diameter side of the groove portion. A winding and an outer diameter side coil wound around the outer diameter side of the groove, and the inner diameter side winding and the outer diameter side winding are different from each other in the teeth portion. It is wound in a bridge shape in between and wound side by side in the radial direction of the armature, and the groove portion is formed on the outer diameter side of the first groove portion formed on the inner diameter side and the first groove portion. A second groove portion formed, wherein the second groove portion is formed deeper than the first groove portion, and the inner diameter side Of the teeth portion around which the winding is wound, the portion arranged inside the winding on the inner diameter side and the outer diameter side of the teeth portion around which the outer diameter side winding is wound with the inside arranged in part of the winding, solved by almost the same der Rukoto the area of the cross section perpendicular to the axial direction of the windings and the windings of the outer diameter side of the inner diameter side are respectively wound Is done.

As described above, the tooth portion includes groove portions formed on both end sides in the axial direction of the armature, and the winding is wound on the inner diameter side wound around the inner diameter side of the groove portion and the outer diameter side. A winding on the outer diameter side, and the winding on the inner diameter side and the winding on the outer diameter side are wound in a bridge shape between the different tooth portions, and the radial direction of the armature Since the coil end side has no portion where the inner diameter side winding and the outer diameter side winding overlap in the axial direction, the height on the coil end side can be suppressed. Therefore, the armature which reduced the dispersion | variation in the gravity center and suppressed unbalance is obtained.
In addition, with the above configuration, the thickness of the tooth portion can be partially changed and adjusted, and the heights of the coil ends of the inner diameter side winding and the outer diameter side winding can be made uniform. Since the cross-sectional area of the core of the wire and the outer diameter side winding can be made equal, the balance of the magnetic characteristics of the inner diameter side winding and the outer diameter side winding must be kept good, and the magnetic characteristics must be impaired. An armature without any is obtained.

Specifically, as in claim 2, the teeth portion has a bridging portion on the inner diameter side between the teeth portion adjacent to one side, and the inner diameter side winding across the bridging portion. It is preferred that the wire is wound.
As described above, the winding on the inner diameter side is wound so as to straddle the bridging portion formed on the inner diameter side between the adjacent teeth portions, so that the space inside the winding can be filled with the core. Therefore, an armature that does not impair the magnetic characteristics can be obtained.

Further, as in claim 3, the teeth portion has a hole filling portion widened on the outer diameter side in the direction opposite to the direction in which the bridging portion is formed, and the hole filling portion is formed on the outer diameter side. It is preferable to arrange it inside the winding.
In this way, the hole filling portion widened on the outer diameter side opposite to the direction in which the bridging portion is formed is arranged inside the outer diameter side winding so that the space inside the winding is cored. Therefore, an armature that does not impair the magnetic characteristics can be obtained.

According to a fourth aspect of the present invention, the teeth portion is opposite to the portion where the first notch portion is formed on the inner diameter side opposite to the portion where the bridging portion is formed and the hole filling portion is formed. It is preferable that the second notch is formed on the outer diameter side.
With the above configuration, an armature is obtained in which the space of the slot located inside the winding is filled with the core and the space in which the coil is wound is expanded.

According to a fifth aspect of the present invention, it is preferable that the winding is wound in alignment with the groove.
Thus, by arranging and winding the windings, the wire occupying ratio in the winding space of the armature core can be improved, and in addition to reducing the variation in the center of gravity and weight, the use of the winding material An armature capable of reducing the amount is obtained.
Further, as in claim 6, when the depth of the first groove and the depth of the second groove are formed in two different steps, the second groove is deeper than the first groove. Is preferred.
As described above, since the first groove portion and the second groove portion are formed, the windings are more preferably aligned.

According to the rotating electric machine according to a seventh aspect , the problem is solved by having the armature according to any one of the first to sixth aspects.
Thus, the rotating electrical machine of the present invention can be obtained with the features of claims 1 to 6 .

According to the armature according to the first aspect, there is no overlap between the inner diameter side winding and the outer diameter side winding on the coil end side, so that the height on the coil end side can be suppressed and unbalance can be reduced. Armature is obtained. In addition, the armature can be adjusted by partially changing the thickness of the teeth portion so that the height of the coil ends of the inner diameter side winding and the outer diameter side winding can be made uniform, and the magnetic characteristics are not impaired. can get.
According to the armature according to claims 2 and 3, since the space inside the winding can be filled with the core, an armature that does not impair the magnetic characteristics can be obtained .
According to armature according to 請 Motomeko 4, with filling the space slots located inside the winding core, armature spread the space in which the coil is wound is obtained.
According to armature according to 請 Motomeko 5, achieving an improvement of wire occupancy, the reduction of the center of gravity and the weight of the dispersion, furthermore, an armature which can reduce the amount of winding material is obtained.
According to the armature according to the sixth aspect, an armature capable of aligning the windings more suitably is obtained.
According to the rotating electrical machine of the seventh aspect, the rotating electrical machine having the features of the first to sixth aspects can be obtained.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that the members, arrangements, and the like described below do not limit the present invention, and can be variously modified within the scope of the gist of the present invention.

(First embodiment)
1 to 3 show a first embodiment according to the present invention. FIG. 1 is a schematic explanatory view of a rotating electric machine, FIG. 2 is a perspective explanatory view of an armature, and FIG. 3 is a partial cross-sectional explanatory view of the armature.

First, based on FIG. 1, the structure of the rotary electric machine 1 which concerns on embodiment of this invention is demonstrated.
The rotating electrical machine 1 in the present embodiment has a stator 5 and an armature 7. The stator 5 includes a substantially cylindrical yoke housing 9 and a plurality of permanent magnets 11 disposed at predetermined intervals inside the yoke housing 9.
The armature 7 includes a rotary shaft 10, an armature core 12 fixed integrally with the rotary shaft 10, and a commutator 14 similarly fixed integrally with the rotary shaft 10. It is supported. The armature 7 is disposed so as to be opposed to the permanent magnet 11 and surrounded by the periphery.

The perspective view of the armature according to the present embodiment shown in FIG. 2 shows a state where windings are formed on some of the teeth portions. Moreover, Fig.3 (a) is a partial longitudinal cross-sectional view of the teeth part by which conducting wire was wound, FIG.3 (b) is the partial cross-sectional view of a teeth part similarly.
The armature core 12 has eight teeth portions 16 that extend radially about the rotation axis, and insulators (not shown) are attached to both sides in the axial direction, and the teeth portions 16 of the armature core 12 are attached to the teeth portions 16. Contact between the wound conductive wire and the armature core 12 is prevented.
The teeth portion 16 extends from the armature core 12 toward the outer periphery in the radial direction, has a core holder 18 projecting toward both sides in the circumferential direction at the outer portion, and has a substantially T-shaped cross section. A slit 20 is formed between the core holders 18. Moreover, the groove part 22 around which a conducting wire is wound is formed in each teeth part 16 at the both sides of an axial direction.
The groove portion 22 is provided on each of both axial sides as a recessed portion formed at a position between the guide wall 19 which is the side surface of the armature core 12 and the inner side surface of the core holder 18.

Each tooth portion 16 of the armature core 12 to which the insulator is attached is provided with a winding 25 by winding a conductive wire in a bridge shape between the tooth portions 16.
The winding 25 formed in the groove portion 22 provided on both sides of the tooth portion 16 in the axial direction includes an inner diameter side winding 26 wound around the inner diameter side of the groove portion 22 and an outer diameter side wound around the outer diameter side. And a winding 28 on the radial side.
The respective ends of the inner diameter side winding 26 and the outer diameter side winding 28 are coupled to a predetermined connecting portion of the commutator 14.

When the outer diameter side winding 28 is wound around the armature core 12 in the state where the inner diameter side winding 26 is formed, the outer end of the armature core 12 on the coil end side, which is both ends in the axial direction, The winding 28 on the radial side is wound so as not to overlap the winding 26 on the inner diameter side. That is, the inner diameter side winding 26 and the outer diameter side winding 28 are wound in a layered manner in the radial direction so as not to overlap the inner diameter side and outer diameter side portions of the groove 22. The crossover portion between the teeth 16 is also wound in layers in alignment with the inner diameter side and the outer diameter side. As described above, since there is no portion where the inner diameter side winding 26 and the outer diameter side winding 28 overlap each other on the coil end side, the height of the outer diameter side winding 28 on the coil end side can be suppressed. .
By suppressing the height on the coil end side, variation in the center of gravity is reduced, and unbalance of the armature 7 can be prevented.
Further, the inner diameter side winding 26 and the outer diameter side winding 28 are both aligned and the wire occupation ratio in the winding space of the armature core 12 is improved. As a result, in addition to reducing the variation in the center of gravity and weight, the amount of winding material used can be reduced.

  As shown in FIG. 3B, both the inner diameter side winding 26 and the outer diameter side winding 28 are wound in accordance with the axial height of the core holder 18. For this reason, the winding 25 does not protrude from the core holder 18 to the coil end side, and since it is an aligned winding, the height of the coil end side of the winding can be uniformly aligned with the axial height of the core holder 18. it can. Thus, by matching the height of the coil 25 on the coil end side with the height of the core holder 18 in the axial direction, it is possible to make the armature 7 with a further lower balance and further improved balance.

  Further, when the outer diameter side winding 28 is wound on the inner diameter side winding 26 as in the prior art, the portion around which the outer diameter side winding 28 is wound is not flat. Thus, it is difficult to stably wind the conducting wire at the target position, and it is difficult to perform aligned winding. However, as in this embodiment, by winding so that the inner diameter side winding 26 and the outer diameter side winding 28 do not overlap each other, the portion to be wound is a stable flat surface of the groove portion 22 covered with the insulator. Therefore, aligned winding is easy.

In the present embodiment, the guide wall 19 is configured as a side surface of the armature core 12, but a member as the guide wall 19 may be separately provided on the side surface of the armature core 12.
Similarly, the side opposite to the guide wall 19 of the groove portion 22 is configured as an inner surface of the core holder 18, but another member may be provided inside the core holder 18.

  In the present embodiment, the windings 25 are wound with aligned windings, but random windings may be used as long as the windings 25 do not overlap at the coil end portion. Even in this case, since the height on the coil end side can be suppressed, variation in the center of gravity can be reduced.

(Second Embodiment)
4 (a) and 4 (b) are partial cross-sectional explanatory views of an armature according to the second embodiment of the present invention, and FIG. 4 (a) is a partial vertical cross-sectional view of a tooth portion around which a conducting wire is wound, FIG. 4B similarly shows a partial cross-sectional view of the tooth portion.
In each of the following embodiments, the same reference numerals are assigned to the same members and arrangements as those in the first embodiment, and detailed description thereof is omitted.
In the present embodiment, the shape of the armature core 32 is different from that in the first embodiment.

The armature core 32 according to the present embodiment is provided with eight tooth portions 36 extending radially about the rotation axis. Each tooth portion 36 is formed with a bridging portion 51 and a hole filling portion 53 in the circumferential direction.
The bridging part 51 is formed between the tooth part 36 adjacent to one side, and a part of the tooth part 36 is widened so as to connect the inner diameter sides of the tooth part 36 in the circumferential direction.
The hole filling portion 53 is a portion widened in the circumferential direction opposite to the direction in which the bridging portion 51 is formed, and is formed on the outer diameter side of the tooth portion 36.

Here, the shape of the tooth part 36 will be described in detail.
When the portion of the tooth portion 36 positioned between the inner wall of the armature core 32 and the core holder 38 is divided into an inner diameter side and an outer diameter side, a bridging portion 51 is formed on the inner diameter side of the tooth portion 36 in the circumferential direction. Is formed. Further, a hole filling portion 53 is formed on the outer diameter side of the tooth portion 36 in a circumferential direction opposite to the forming direction of the bridging portion 51.
In addition, the inner diameter side of the teeth portion 36 has a bridging portion 51, and a notch portion 55 (first notch portion) is formed in a portion opposite to the portion where the bridging portion 51 is formed. Yes. Similarly, a cutout portion 56 (second cutout portion) is formed on the outer diameter side of the tooth portion 36 at a portion opposite to the portion where the hole filling portion 53 is formed. Thus, the tooth portion 36 according to the present embodiment has a shape having the core holder 38 on the outer peripheral side of the substantially key-shaped portion.

Moreover, the groove part 42 is formed in the both sides of the axial direction of each teeth part 36 in order to wind a conducting wire.
The groove portion 42 according to the present embodiment is formed in two stages in which the depth of the groove is different between the inner diameter side and the outer diameter side of the tooth portion 36, and the groove portion 44 (second groove portion) on the outer diameter side of the tooth portion 36. However, it is formed deeper than the groove portion 43 (first groove portion) on the inner diameter side of the tooth portion. By partially changing the thickness of the groove portion 42, the coil end side height can be made uniform even when the winding shape of the inner diameter side winding 46 and the outer diameter side winding 48 are different.
As described above, the bridging portion 51, the hole filling portion 53, and the cutout portions 55 and 56 are provided in the circumferential direction of each tooth portion 36, and the groove portions on the inner diameter side having different groove depths on both sides in the axial direction. 43 and the outer diameter side groove portion 44, the inner diameter side winding 46 is connected to the inner diameter side groove portion 43 and the pair of teeth portions 36, 36 connected by the bridging portion 51. It is wound around
On the other hand, the winding 48 on the outer diameter side is wound around the notches 56 and 56 of the pair of teeth portions 36 and 36 provided with the groove portion 44 on the outer diameter side and the hole filling portion 53 facing each other. Yes.

Since the winding 46 on the inner diameter side is wound across the bridging portion 51, the space (dead space 58: see FIG. 3) between the two wound tooth portions 36, 36 is bridged 51. Can be filled by. And the teeth parts 36 and 36 and the bridging part 51 which are located inside the winding 46 on the inner diameter side can function as a core of the winding.
Since the winding 48 on the outer diameter side is wound in a bridge shape between the two tooth portions 36 and 36 so that the hole filling portions 53 and 53 are arranged inside the winding, the first embodiment As compared with the above, the space inside the winding (dead space 58) can be reduced. Of course, the teeth portions 36 and 36 and the hole filling portions 53 and 53 located inside the winding 48 on the outer diameter side function as a core of the winding.

Notches 55 and 55 on the inner diameter side are provided in each of the pair of teeth portions 36 and 36 located across the bridging portion 51, while notches on the outer diameter side are also provided on the outer diameter side of the teeth portions 36 and 36. Since the portions 56 and 56 are provided, by adjusting the sizes of the notch portion 55 on the inner diameter side and the notch portion 56 on the outer diameter side, the inner diameter side and the outer diameter side of the teeth portions 36 and 36 are adjusted. The inner diameter side winding 46 and the outer diameter side winding 48 wound around each may have a core having an equivalent cross-sectional area. By making the cross-sectional areas of the cores equal, it is possible to maintain a good balance of the magnetic properties of the winding 46 on the inner diameter side and the winding 48 on the outer diameter side. Further, the magnetic characteristics are not impaired as compared with an armature having a winding constituted by concentrated winding around one tooth portion 36.
Similarly, the cross-sectional area of the core can be adjusted by partially changing the thickness of the groove 42.
Further, the inner diameter side winding 46 and the outer diameter side winding 48 are connected to the inner diameter side winding 26 and the outer diameter side winding 26 in the first embodiment by the inner diameter side cutout portion 55 and the outer diameter side cutout portion 56. Since it is arranged more compactly than the winding 28 on the outer diameter side, the space for winding the conducting wire can be expanded, and the winding process becomes easier.

  In addition, the bridge part 51 in this embodiment is comprised integrally between a pair of adjacent teeth parts 36 and 36, and the dead space 58 is reduced and the workability of the armature core 32 is improved. It is configured as a good shape. However, the bridging part 51 may be configured separately, and the weight of the armature core 32 can be reduced, that is, the natasha can be reduced.

In addition, the size and shape of the inner diameter side cutout portion 55 and the outer diameter side cutout portion 56 can be appropriately changed. By adjusting the shape of the cutout portions 55 and 56, the winding 45 can be wound. A space for winding according to the number of turns can be secured.
Furthermore, by adjusting the shapes of the notch portion 55 on the inner diameter side, the notch portion 56 on the outer diameter side, the bridging portion 51, the hole filling portion 53, and the groove portion 42, the teeth portions 36 and 36 are wound around. The shape of the winding 45 can be changed.

  According to the armature 7 according to the present invention, the dead space can be obtained by changing the arrangement of the windings 26 and 46 on the inner diameter side and the windings 28 and 48 on the outer diameter side and the shapes of the teeth portions 16 and 36 of the lap product. The coil end can be reduced. In addition, the winding of the armature 7 can be reduced due to the stability of the center of gravity of each of the windings 25 and 45 by the aligned winding and the stabilization of the weight position by reducing the variation in the amount of conductive wire used, and the balance measurement, The balance correction process can be abolished. Further, compared to random winding, aligned winding is less wasteful in the arrangement of windings, so that the amount of wire used can be reduced and material costs can be reduced.

It is a schematic explanatory drawing of the rotary electric machine which concerns on the 1st Embodiment of this invention. It is a perspective explanatory view of the armature according to the first embodiment of the present invention. It is a partial cross section explanatory view of the armature concerning a 1st embodiment of the present invention. It is a fragmentary sectional view of the armature according to the second embodiment of the present invention. It is a perspective view of a conventional armature. It is a schematic explanatory drawing of the conventional armature.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rotating electric machine, 5 Stator, 7 Armature, 9 Yoke housing, 10 Rotating shaft, 11 Permanent magnet, 12, 32, 112 Armature core, 14 Commutator, 16, 36, 116 Teeth part, 18, 38 Core holder, 19 Guide wall, 20 slit, 22, 42 groove, 25, 45 winding, 26, 46, 126 inner diameter side winding, 28, 48, 128 outer diameter side winding, 43 inner diameter side groove, 44 outer diameter side Groove part, 51 bridging part, 53 hole filling part, 55 notch part on the inner diameter side, 56 notch part on the outer diameter side, 58 dead space

Claims (7)

An armature core having a plurality of teeth extending radially;
In the armature provided with a winding wound in a bridge shape between the plurality of teeth portions of the armature core,
The teeth portion includes grooves formed on both end sides in the axial direction of the armature,
The winding has an inner diameter side winding wound on the inner diameter side of the groove portion, and an outer diameter side winding wound on the outer diameter side of the groove portion,
The winding on the inner diameter side and the winding on the outer diameter side are wound in a bridge shape between the different tooth portions, and wound side by side in the radial direction of the armature ,
The groove portion includes a first groove portion formed on the inner diameter side and a second groove portion formed on the outer diameter side with respect to the first groove portion, and the second groove portion includes the first groove portion. Formed deeper than the groove,
Of the teeth portion around which the inner diameter side winding is wound, the portion disposed inside the inner diameter side winding, and among the teeth portion around which the outer diameter side winding is wound, The portion arranged on the inner side of the outer diameter side winding has substantially the same cross-sectional area perpendicular to the axial direction around which the inner diameter side winding and the outer diameter side winding are wound. An armature characterized by that. The teeth portion has a bridging portion on the inner diameter side between the teeth portions adjacent to one side,
The armature of claim 1, wherein the inner diameter side of the winding across the bridging portion is wound. The teeth portion has a hole filling portion widened on the outer diameter side opposite to the direction in which the bridging portion is formed,
The armature according to claim 2 , wherein the hole filling portion is disposed inside the winding on the outer diameter side. The teeth portion has a first notch formed on the inner diameter side opposite to the portion where the bridging portion is formed, and a second outer diameter side opposite to the portion where the hole filling portion is formed. The armature according to claim 3 , wherein a notch is formed. The armature according to any one of claims 1 to 4 , wherein the winding is wound in alignment with the groove. 6. The depth of the first groove and the depth of the second groove are formed in two different stages, the second groove being deeper than the first groove. The armature according to any one of the above. A rotating electrical machine comprising the armature according to any one of claims 1 to 6 .

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