JP4644596B2 - Stator for rotating electrical machine, insulator for coil, and rotating electrical machine - Google Patents

Description

  The present invention relates to a technique for providing a rotating electric machine such as an electric motor or a generator.

  In general, a stator of a rotating electrical machine is provided with a plurality of coils of a plurality of phases, and a connecting wire or the like for electrically connecting the coils is configured with attention to insulation. There is a description.

JP 2002-247792 A

  An example of the structure of the stator in Patent Document 1 is shown in FIG. This example is a case of a three-phase synchronous motor using 12 coils. There are four coils for each phase, and when it is necessary to electrically connect coils in the same phase, the connecting wire connecting the coils is insulated so that the connecting wire and the connecting wire are insulated from each other. A stator for a rotating electrical machine is configured using the wiring processing member 6, and a rotating electrical machine including these is described.

  In order to improve the insulation between the coil and the jumper wire, between the jumper wires, and the terminal wire, when manufacturing the wiring processing member 6 made of an insulating material, the resin having the insulation property is molded using a mold. It is common.

  However, there is a problem that the wiring processing member has a complicated shape and the mold becomes expensive, and as a result, the cost of the member becomes expensive. Therefore, as described above, it is a problem to avoid as much as possible the improvement of insulation and the increase in cost.

  In order to solve the above problems, the following means are used.

  When a plurality of multi-phase coils of a rotating electrical machine stator of a rotating electrical machine are provided, the crossover wires, coil windings, and terminal wires that electrically connect the coils are insulated from each other by a sheet-like insulator. Try to plan.

  Further, when the coil is provided between the inner wall portion (hereinafter referred to as the inner wall) of the bobbin that constitutes the stator and supports the coil, and the outer wall portion (hereinafter referred to as the outer wall). The sheet-like insulator is also provided between the inner wall and the outer wall of the bobbin.

  Accordingly, the planar shape of the sheet-like insulator is made to correspond to the shape formed by the inner wall and the outer wall of the bobbin. For example, an arc shape formed by arbitrarily cutting a concentric belt-like member is used.

  The sheet-like insulator has a hole through which a conductor wire such as a jumper wire, a coil wire, a terminal wire, an electric wire, and the like pass, and from the hole to the end surface of the insulator.

  As the sheet-like insulator, an insulating paper may be used.

  According to the present invention, it is possible to provide a rotating electrical machine such as an electric motor or a generator that is less expensive than conventional ones.

  Embodiments of the present invention will be described below with reference to the drawings.

  This embodiment is a case of a three-phase synchronous motor using six coils. FIG. 1 is a perspective view of a stator, FIG. 2 is a sheet-like insulator, and FIG. 3 is a sectional view of a coil end portion. is there.

  In FIG. 1, 1 is a stator, 2a, 2b and 2c are lead wires for U-phase, V-phase and W-phase coils, 3a, 3b and 3c are connecting wires for U-phase, V-phase and W-phase coils, and 4 is a sheet. Insulators 5a and 5b are a wall portion on the inner diameter side and a wall portion on the outer diameter side of the bobbin around which the coil is wound. A total of six coils are accommodated in the stator slot, and the crossover wires for each phase are arranged on the upper part of the coils. In order to ensure insulation between the phases, it is necessary to dispose an insulating material between the connecting wires of each phase, and a sheet-like insulator shown in FIG. 2 is disposed as the insulating material.

  A first sheet-like insulator 4 is disposed on the coil end, and a U-phase connecting wire 3a passes through a hole 4a of the first sheet-like insulator 4, and the sheet-like insulator 4 The insulator 4 has a cut portion 4b for passing the crossover wire through the hole 4a.

  Here, the first sheet-like insulator 4 has a sufficient shape so that the U-phase connecting wire 3a does not contact the coil. Further, the sheet-like insulator 4 has a shape that fits between the wall portion 5a on the inner diameter side and the wall portion 5b on the outer shape side so that it can be stably disposed on the upper portion of the coil.

  Similarly, the second sheet-like insulator 4 is disposed on the U-phase connecting wire, and the V-phase connecting wire 3b passes through the hole 4a of the second sheet-like insulator 4. The V-phase connecting wire 3b and the U-phase connecting wire 3a are not in contact with each other. Further thereon, a third sheet-like insulator is disposed, and a W-phase connecting wire 3b passes through a hole 4a of the third sheet-like insulator 4, and a W-phase connecting wire is provided. It has a sufficient shape so that 3C and the V-phase connecting wire 3b do not come into contact with each other.

  FIG. 3 is a cross-sectional view of the coil end portion of the stator shown in FIG. With such a configuration, the insulation between the coil, the crossover wire, and the crossover wire is increased as compared with the conventional case.

  In this embodiment, the hole 4a of the sheet-like insulator 4 is provided at one place for one sheet of insulating paper, but the hole 4a of the sheet-like insulator 4 may be provided at a plurality of places for one piece of insulating paper. The holes 4a may be disposed at both ends of the insulating paper.

  Moreover, it does not matter if it has a U-shaped groove shape instead of a hole. In addition, the shape of the sheet-like insulator 4 has been described with a substantially semicircular insulating paper, but a sheet-like insulator having a donut shape may be used to further stabilize the arrangement.

  In addition, since the bobbin shape may be provided in a polygonal shape corresponding to the shape of the slot having the winding, etc., the sheet-like insulator is also a polygon having a different size corresponding to this shape. Thus, a shape in which a large polygon is an outer wall portion of the bobbin and a small polygon is an inner wall portion of the bobbin, and the connected belt-like members are arbitrarily cut off.

  Further, a sheet-like insulator may be used to insulate terminal wires (not shown).

Perspective view of stator Sheet insulation Cross section of coil end The figure which shows the structural example of the stator of the conventional rotary electric machine

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Stator, 2a, 2b, 2c ... Lead-out line, 3a, 3b, 3c ... Crossover wire, 4 ... Sheet-like insulator, 4a ... Hole, 4b ... Notch part, 5a, 5b ... Bobbin wall part, 6 ... Coil end, 7 ... Wiring processing member

Claims (6)

Oite the rotary electric machine having a stator and a bobbin for supporting the multiple coil the multiple coils,
The stator is
A plurality of connecting lines for electrically connecting the coil of the multiple mutually,
A sheet that is disposed between the first and second coils arranged on top of the plurality of coils and that insulates the plurality of coils and the first bridge lines. A first insulator in a shape ;
A sheet-like shape that is disposed between the second crossover line and the second crossover line disposed above the first crossover line and insulates the first crossover line and the second crossover line. A second insulator of
Rotary electric machine characterized by comprising a. In the rotating electrical machine according to claim 1,
The first insulator has a hole through which the first connecting wire passes, and is disposed by passing the first connecting wire through the hole;
The rotary electric machine according to claim 1, wherein the second insulator has a hole through which the second jumper wire passes, and is arranged by passing the second jumper wire through the hole. In the rotating electrical machine according to claim 1 or 2,
The rotating electrical machine is a three-phase rotating electrical machine,
The stator is further disposed between a third crossover line and an upper part of the second crossover line, the second crossover line, and the second crossover line and the third crossover line. A sheet-like second insulator that insulates the wire;
The rotary electric machine characterized in that the first crossover line, the second crossover line, and the third crossover line are crossover lines of different phases among the three phases. In the rotating electrical machine according to any one of claims 1 to 3,
The rotary electric machine according to claim 1, wherein the first insulator and the second insulator are disposed between an inner wall portion of the bobbin and an outer wall portion of the bobbin. In the rotating electrical machine according to any one of claims 1 to 3,
The rotating electrical machine according to claim 1, wherein planar shapes of the first insulator and the second insulator are arc shapes concentric with the bobbin. In the rotating electrical machine according to any one of claims 1 to 3,
The bobbin has a polygonal shape,
The rotating electrical machine according to claim 1, wherein the planar shape of the first insulator and the second insulator is a polygonal shape that matches the shape of the bobbin.

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