JP4097968B2 - Power collection and distribution ring for rotating electrical machine and method for manufacturing the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a power collection / distribution ring of a rotating electrical machine that performs power collection / distribution with an external device with respect to a stator coil of the rotating electrical machine such as an electric motor or a generator, and a method for manufacturing the same.
[0002]
[Prior art]
As a conventional power collection and distribution ring of a rotating electrical machine, for example, there is one disclosed in Japanese Patent Laid-Open No. 2001-25198. As shown therein, the power collection and distribution ring is for collecting and distributing power between a coil attached to the magnetic pole teeth of the stator and an external device. FIG. 6 shows an exploded explanatory view of this type of power collection and distribution ring and a stator to which this ring is attached.
[0003]
As shown in FIG. 6, the annularly formed stator 1 is provided with a plurality of magnetic pole teeth that protrude in the radial direction at intervals in the circumferential direction, and coils are provided to these magnetic pole teeth. 3 is wound around each phase (for example, U phase, V phase, W phase). And the power distribution ring 4 (4U, 4V, 4W) corresponding to these coils 3 (3U, 3V, 3W) is provided. Each power collection / distribution ring 4U, 4V, 4W is connected to an annular ring body 5, a coil connection terminal 6 for connection to the corresponding coils 3U, 3V, 3W, and an external device (not shown). An external connection terminal 7 is provided, and power collection and distribution is performed between the coil 3 and the external device via the terminals 6 and 7. Reference numerals 8 and 9 denote a lid portion and a bus ring of the stator 1, respectively. The bus ring 9 is made of an annular conductive member and has a coil connection terminal on the outer peripheral side and is connected to a neutral point of the stator coil. The
[0004]
[Problems to be solved by the invention]
However, as shown in FIG. 7, the ring main body 5 of the power collection and distribution ring 4 is manufactured by punching a substantially rectangular plate 10 into an annular shape, so that the remaining portion of the plate 8 (hatched portion in FIG. 7) There was a problem that it was wasted, the manufacturing yield was poor, and the cost burden was high.
[0005]
The present invention has been made in view of such circumstances, and it is an object of the present invention to provide a power collection and distribution ring for a rotating electrical machine that can improve the manufacturing yield and reduce the cost burden.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, the invention described in claim 1 is a power collection / distribution ring (for example, a power collection / distribution ring 20 in an embodiment to be described later) that performs power collection / distribution with respect to a coil of a stator with an external device. The power collection and distribution ring includes a plurality of ring main bodies (for example, ring main bodies 21 in the embodiments described later) corresponding to the respective phases of the coils, and each ring main body has a substantially strip-shaped conductive shape. A curved base material that is formed in an arc shape by bending an elastic member (for example, a strip-shaped member 25 in an embodiment described later), and an external connection that is abutted against and integrated with both ends of the curved base material A terminal (for example, an external connection terminal 22 in an embodiment described later) and a coil connection terminal formed by punching a peripheral portion of the curved base material (for example, a coil connection terminal in an embodiment described later) 3) and wherein the plurality of ring body is insulating resin portion (e.g., integrated in a state spaced from each other by the resin portion 24) in the embodiment described below, the said external connection terminal coil The rotating electrical machine is characterized in that the connection terminal is exposed to the outside of the resin portion, and the tip of the external connection terminal configured in each of the plurality of ring bodies is adjusted to be in the same plane. Distribution ring.
[0007]
According to this invention, since the ring body is formed by curving a strip-shaped conductive member in the width direction, the conductive member is curved in the longitudinal direction and the conductive member is arranged in parallel with the axial direction of the stator. Compared to the case, the thickness of the ring body, and thus the entire power collection and distribution ring, can be reduced. Since these power collection and distribution rings are stacked in a state where insulation is ensured and attached to the stator of the rotating electrical machine, the rotating electrical machines equipped with these power collection and distribution rings can be made compact, and mounting is improved. To do. Further, since the ring body is formed using the strip-shaped conductive member, the manufacturing yield can be improved, and the cost burden can be reduced accordingly.
[0009]
In addition , since each of the plurality of ring bodies is integrated with a space therebetween, each ring body can be attached to the stator at a time. This eliminates the need to individually insulate each ring body, thereby simplifying the work of attaching the power collection and distribution ring to the stator. In addition, since the insulation treatment is performed by the resin portion, it is not necessary to perform multi-layer coating or the like that requires an expensive and great man-hour, and the cost burden can be further reduced.
[0010]
The invention described in claim 2 is a method of manufacturing a power collection / distribution ring that performs power collection / distribution with respect to a coil of a stator with an external device, and a plurality of substantially strip-like shapes corresponding to each phase of the coil. Each of the conductive members is curved in the width direction to form a plurality of curved base materials, and the external connection terminals are brought into contact with both ends of the curved base material so as to be integrated, and the inner peripheral edge portion of the curved base material is A rotation characterized in that a coil connection terminal is formed by punching, and the external connection terminal is bent in the axial direction so that tip ends of the external connection terminals formed in each of the plurality of ring bodies are in the same plane. This is a method of manufacturing an electric power collection and distribution ring.
[0011]
According to this invention, since the power collection and distribution ring is manufactured by the substantially strip-shaped conductive member, the manufacturing yield can be increased and the cost burden can be reduced. In addition, by curving the conductive member in the width direction, it is possible to manufacture a current collection and distribution ring that is thin in the thickness direction.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a power collection and distribution ring for a rotating electrical machine and a method for manufacturing the same according to embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram of a power collection and distribution ring 20 according to the first embodiment of the present invention. As shown in FIG. 1A, each of the power collection and distribution rings 20 (20U, 20V, 20W) includes a ring body 21 formed in an annular shape, and each ring body 21 protrudes in the outer circumferential direction. The external connection terminal 22 is provided as described above, and the coil connection terminal 23 is provided so as to protrude in the inner circumferential direction.
[0013]
Each of the ring main bodies 21 (21U, 21V, 21W) is made of a conductive member such as copper and is formed to have the same size. Further, as will be described in detail later, it is formed by curving a substantially strip-shaped member 25 (see FIG. 3) in the width direction. Since it did in this way, the thickness (length of the arrow A direction) of the formed ring main body 21 can be made thin. Details will be described later.
[0014]
As shown in FIG. 1A, the external connection terminal 22 (22U, 22V, 22W) is formed by a substantially rectangular and flat conductive member, and the axial direction of the ring main body 21 (arrow) A bent portion 29 (29U, 29V, 29W) that is bent in the (A direction) is provided. Further, a mounting hole 30 for connecting to an input / output connection terminal (not shown) of an external device such as an inverter device is formed at the tip of each external connection terminal 22. In the present embodiment, the length of the bent portion 29 is adjusted so as to be in the order of 29U, 29V, and 29W. As a result, as will be described in detail later, when the respective power collection and distribution rings 20 are integrated, the tip of each external connection terminal 22 is adjusted so as to be within the same plane (FIG. 1B). reference).
[0015]
On the other hand, the coil connection terminal 23 is formed so as to protrude from the inner periphery of each ring main body 21 at a predetermined interval in the center direction. The coil connection terminals 23 (23U, 23V, 23W) formed on each ring body 21 are formed at positions shifted from each other by a predetermined angle with respect to the external connection terminals 22 of each ring body 21. As a result, as will be described in detail later, when the respective power collection and distribution rings 20 are integrated, the coil connection terminals 23 are shifted from each other by a predetermined pitch when viewed from the axial direction of the ring body 21 (arrow A direction). It adjusts so that it may become (refer FIG.1 (b)).
[0016]
The power collection and distribution ring 20 configured as described above is an integrated conductive unit 31 as shown in FIG. Moreover, FIG. 2 is a BB arrow line view of FIG.1 (b). As shown in these drawings, each power collection and distribution ring 20 is integrated with an interval in the axial direction of the stator and held by an insulating resin portion 24. By integrating each power collection and distribution ring 20 in this way, it is not necessary to separately insulate each power collection and distribution ring 20 and assemble it to a stator (not shown), and it is sufficient to assemble the conductive unit 31 to the stator. For this reason, it is possible to reduce the number of assembling steps and the trouble of mounting.
[0017]
As shown in FIG. 1 (b), the coil connection terminals 23 of each power collection and distribution ring 20 are assembled so as to protrude from positions shifted at predetermined intervals. , V-phase, W-phase) coils (see FIG. 6). The external connection terminal 22 and the coil connection terminal 23 are formed so as to be exposed from the resin portion 24 so that the terminals 22 and 23 can be electrically connected to an external device and a coil.
[0018]
A method for manufacturing the power collection and distribution ring 20 configured as described above will be described with reference to FIGS. First, as shown in FIG. 3A, a substantially strip-shaped member 25 (in other words, a rectangular and flat plate shape) made of a conductive material such as copper is formed. Next, as shown in FIG. 3B, the strip-shaped member 25 is bent in the width direction (arrow C direction). In bending the strip-shaped member 25, while pressing one side surface of the strip-shaped member in the longitudinal direction against the columnar fixing member, the strip-shaped member 25 is curved to a position where the tip and the end of the strip-shaped member are opposed to each other, thereby arc-shaped bending base. The material 26 is used. And as shown in FIG.3 (c), the curved base material 26 is pinched | interposed with the press member which is not shown in figure, and the unevenness | corrugation 32 which generate | occur | produced in the curved base material 26 is eliminated, and it planarizes.
[0019]
Then, as shown in FIG. 4A, punching processing is performed on both ends of the curved base material 26 so that the distance D between the both end portions 27 of the curved base material 26 is equal to the width of the external terminal base material 28. To. Next, as illustrated in FIG. 4B, the external terminal base material 28 is inserted and disposed so as to contact both end portions 27 of the curved base material 26. In this state, as shown in FIG. 4C, the portions where the external terminal base material 28 and the curved base material 26 are in contact are joined and integrated by welding, fusing, or the like.
[0020]
Then, as shown in FIG. 5A, the peripheral portion of the curved base material 26 to which the external terminal base material 28 is bonded is punched out, and the external connection terminal 22 having a substantially rectangular shape is formed from the external terminal base material 28. The ring body 21 and the coil connection terminal 23 are formed from the curved base material 26. In addition, the formation position of the coil connection terminal 23 (23U, 23V, 23W) is formed so as to deviate from each external connection terminal 22 at predetermined intervals. A mounting hole 30 is formed at the tip of the external connection terminal 22. Then, as shown in FIG. 5B, the external connection terminal 22 is bent in the axial direction of the ring body 21 to form a bent portion 29 in the external connection terminal 22. At this time, the length of the bent portion 29 of the external connection terminal 22 is formed so as to increase in the order of 22U, 22V, and 22W, and the external connection terminal is formed when the current collection and distribution rings 20 are integrated to form the conductive unit 31. It adjusts so that the front-end | tip part of 22 may be in the same plane. As described above, the power collection and distribution ring 20 is manufactured.
[0021]
As described above, each power collection / distribution ring 20 is manufactured by the substantially strip-shaped conductive member 25, so that most of the base material can be used, and the manufacturing yield is greatly increased as compared with the conventional case. And cost burden can be reduced accordingly. In addition, by curving the conductive member in the width direction, it is possible to manufacture a current collection and distribution ring that is thin in the thickness direction.
[0022]
In the above-described embodiment, the case where each ring body is insulated with resin has been described. However, the present invention is not limited to this, and the insulation treatment may be performed by fluorine processing, for example. Moreover, the size of each ring main body does not need to be the same.
[0023]
【The invention's effect】
As described above, according to the first aspect of the present invention, the rotating electrical machine including the power collection and distribution ring can be made compact, and the mountability is improved. Further, the manufacturing yield is improved, and the cost burden can be reduced accordingly.
[0024]
In addition , since each ring body can be attached to the stator at once, and it is not necessary to individually insulate each ring body, the work of attaching the power collection and distribution ring to the stator can be simplified. In addition, it is not necessary to perform expensive multilayer coating that requires a large number of work steps, and the cost burden can be further reduced.
[0025]
According to the invention described in claim 2 , since it is manufactured by a substantially strip-shaped conductive member, the manufacturing yield can be increased and the cost burden can be reduced. In addition, by curving the conductive member in the width direction, it is possible to manufacture a current collection and distribution ring that is thin in the thickness direction.
[Brief description of the drawings]
FIG. 1A is a perspective view of each power collection and distribution ring in the embodiment of the present invention, and FIG. 1B is a perspective view of a conductive unit in which these power collection and distribution rings are integrated.
FIG. 2 is a view taken along arrow BB in FIG.
3 is a process diagram showing a manufacturing method of the power collection and distribution ring of FIG. 1; FIG.
4 is a process diagram showing a manufacturing method of the power collection and distribution ring of FIG. 1; FIG.
FIG. 5 is a process diagram showing a method for manufacturing the power collection and distribution ring of FIG. 1;
FIG. 6 is an exploded perspective view showing a conventional stator of a rotating electrical machine and a power collection and distribution ring attached to the stator.
FIG. 7 is an explanatory diagram showing a problem of a conventional power collection and distribution ring.
[Explanation of symbols]
20 Power Distribution Ring 21 Ring Body 22 External Connection Terminal 23 Coil Connection Terminal 24 Resin Portion 25 Strip-shaped Member

Claims (2)

A power collection and distribution ring that collects and distributes power to and from an external device with respect to the stator coil
The power collection and distribution ring includes a plurality of ring bodies corresponding to each phase of the coil,
Each ring body is curved base material formed in an arc shape by curving a substantially strip-shaped conductive member in the width direction, external connection terminals that are abutted and integrated with both ends of the curved base material, A coil connection terminal formed by punching a peripheral portion of the curved base material ,
The plurality of ring bodies are integrated with an insulating resin part spaced apart from each other, and the external connection terminals and the coil connection terminals are exposed to the outside of the resin part, and the plurality of ring bodies A power collection and distribution ring for a rotating electrical machine, wherein the front end portions of the external connection terminals respectively configured are adjusted so as to be in the same plane . A method of manufacturing a power collection and distribution ring that collects and distributes power with an external device with respect to a stator coil,
A plurality of substantially strip-shaped conductive members corresponding to the respective phases of the coil are respectively curved in the width direction to form a plurality of curved base materials, and external connection terminals are abutted against both ends of the curved base materials to be integrated. And forming the coil connection terminal by punching out the inner peripheral edge portion of the curved base material, and the external connection terminal portion configured in each of the plurality of ring bodies is in the same plane. A method of manufacturing a power collection and distribution ring for a rotating electrical machine, wherein the terminal is bent in the axial direction .

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