JP5208427B2 - Rotating electric machine - Google Patents

Description

  The present invention relates to a rotating electrical machine, and more particularly to a technique for connecting a plurality of conductors used in a stator coil of the rotating electrical machine.

Rotating electric machines or motors are widely used in various fields. In this motor, a stator coil that applies a rotating magnetic field to the rotor generally has a plurality of conductors. The plurality of conductors are supplied with a supplied current, and various devices have been made in connecting the plurality of conductors. For example, Patent Documents 1-3 disclose the disclosure.
Japanese Patent Application No. 2005-376964 JP 2003-209944 A JP-A-5-300688

  By the way, in connecting the above-mentioned plurality of conductors, there is a method of providing a metal tube and connecting the metal tube by applying pressure deformation to the metal tube. In this case, it is necessary to increase the electrical continuity between the plurality of conductors and the metal tube. As a method for this, there is a method called fusing. The connection in this case is shown in FIG. In FIG. 5, a part of all the conductors has a portion in contact with the inner wall of the metal tube. Since the inner wall of the metal tube is tin-plated or the like, tin can be easily diffused and joined to the metal tube during fusing.

  By the way, in recent years, mounting of rotating electrical machines on products that require a large capacity has been seen. For example, there are automobiles (powertrain), large refrigerators and air conditioners. Increasing the capacity may increase the number of conductors. For example, when a conductor is wound in a concentrated winding structure, 12 conductors are used in one slot, and in a stator having 12 slots, 12 × 12 = 144 conductors are connected. 144 may be connected using one metal tube, or a plurality of units may be connected with a metal tube, and a plurality of metal tubes may be connected.

  However, even if a plurality of units of conductors are connected by a single metal tube, if the number of conductors increases, as shown in FIG. 5, it is not possible for some of all conductors to contact the inner wall of the metal tube. In reality, it is often difficult. If all the conductors do not contact the inner wall of the metal tube, it may be difficult to improve the electrical continuity between the plurality of conductors and the metal tube, which is a problem.

  Accordingly, an object of the present invention is to solve these problems, and an object of the present invention is to provide a rotating electrical machine, particularly a motor, which has improved reliability compared to the conventional system.

In order to solve the above problems, the following measures are taken. That is, the present invention relates to a rotor that rotates about a rotation axis, a stator that includes a coil having a plurality of conductors that cause a current to flow and generate a magnetic field, a bearing that supports the rotation axis, and a bearing that supports the bearing. A plurality of conductors including a material of a metal different from the conductor and an insulating layer on a surface of the conductor, the rotating electric machine including a bracket for supporting the bracket and the stator. Put a plurality of conductors together in a metal tube, pressurize and deform while heating without leaving all the conductors in contact with the inner wall of the metal tube, remove the insulating layer by heating, In the rotating electrical machine, the conductors are connected to each other by diffusion of the dissimilar metal material, and the electrical continuity between the plurality of conductors and the metal tube is improved even for the conductor that is not in contact with the inner wall of the metal tube .

Then, the present invention, the conductor is with the conductor the conductor surface comprises a material with insulating layers of different metals, bundling the conductor in plural units,-out winding it in foil of the dissimilar metals, A rotating electrical machine in which a plurality of metal foils wound with different metal foils are put together in a metal tube and subjected to pressure deformation while being heated to connect the conductors together .

  Furthermore, the present invention is a rotating electrical machine in which the plurality of conductors and the dissimilar metal member are placed in a pipe of the metal pipe and are subjected to pressure deformation while being heated to connect the conductors.

  Moreover, this invention is a rotary electric machine whose said different metal is tin.

  According to the present invention, it is possible to obtain a rotating electrical machine, in particular a motor, with improved reliability compared to the conventional system.

The best mode for carrying out the present invention will be described.
Embodiments of the rotating electrical machine of the present invention will be described below with reference to the drawings.

  Examples will be described. FIG. 1 is a diagram for explaining this embodiment. The rotating electrical machine shown in FIG. 1 is a motor, and includes a rotor 30 that rotates about a rotating shaft 40, a stator 20 that applies a rotating magnetic field to the rotor 30, and bearings 70 and 80 that support the rotating shaft 40. The brackets 50 and 60 that support the bearings 70 and 80 and the housing 10 that supports the brackets 50 and 60 and the stator 20 are provided. In this rotating electrical machine, the stator 20 is formed by connecting a plurality of conductors.

  FIG. 2 shows a first embodiment in which a plurality of conductors are connected using a metal tube. FIG. 2 shows the conductor 120 tinned. The conductor 120 generally has an electrically insulative enamel layer on the surface in many cases. However, it is preferable to remove the enamel layer in connection. It is possible to remove this enamel layer with a machine, a solvent, etc. However, as described above, if the number of conductors 120 increases, the time required for the removal increases, resulting in a decrease in manufacturing efficiency. There is.

  Therefore, in this embodiment, the enamel layer can be removed by heating when the pressure deformation is performed by the above-described fusing, and the production efficiency can be improved.

  In the embodiment shown in FIG. 2, the number of conductors is large and not all the conductors 120 are in contact with the inner wall of the metal tube 100. However, since the conductors 120 are tin-plated, When heated during pressure deformation, tin promotes diffusion bonding with the metal tube 100, so even if a portion of the conductor 120 is not in contact with the inner wall of the metal tube 100, The connection of the plurality of conductors 120 and the metal tube 100 can be improved.

  FIG. 3 shows a second embodiment. In the embodiment shown in FIG. 3, a plurality of conductors 110 bundled in units are wound with a tin foil 130. In this case as well, there is a function similar to that of the first embodiment (see FIG. 2).

  FIG. 4 shows a third embodiment. In the embodiment of FIG. 4, a plurality of conductors 110 and a tin member 140 are placed in the tube of the metal tube 100 and are pressed and deformed while being heated, and the plurality of conductors 110 are connected. In this case as well, there is a function similar to that of the first embodiment (see FIG. 2).

  In the description of each of the embodiments described above, the winding method of the conductor is not particularly specified, but this may be concentrated winding, distributed winding, or other winding method. . The above embodiment can be implemented as long as many conductors are connected. Therefore, although it demonstrated as a rotary electric machine above, it is not limited to a rotary electric machine, The said Example can be implemented in the apparatus which has a transformer and several conductors.

  In the description of the above embodiment, the material of the metal tube is not particularly specified. However, this is copper, brass, phosphor bronze, platinum, silver, gold, In addition, the conductor may be a conductive substance of a different metal.

Explanatory drawing explaining an Example. Sectional drawing of the conductor connection part of a 1st Example. Sectional drawing of the conductor connection part of a 2nd Example. Sectional drawing of the conductor connection part of a 3rd Example. Explanatory drawing explaining the prior art.

Explanation of symbols

10: Housing 20: Stator 30: Rotor 40: Rotating shaft 50: Bracket 60: Bracket 70: Bearing 80: Bearing 100: Metal tube (copper tube)
110: Conductor (enameled wire)
120: Tin-plated conductor (enameled wire)
130: Tin foil 140: Tin member

Claims (4)

A rotor that rotates about a rotation axis; a stator that includes a coil having a plurality of conductors that pass a current and generate a magnetic field; a bearing that supports the rotation axis; a bracket that supports the bearing; and the bracket And a rotating electrical machine comprising a housing that supports the stator,
The plurality of conductors are provided with a material of a metal different from the conductor and an insulating layer on the conductor surface, and a plurality of the plurality of conductors are put together in a metal tube so that all the conductors are the metal. While being not in contact with the inner wall of the tube, pressurizing and deforming while heating, the insulating layer is removed by heating, the conductors are connected by diffusion of the dissimilar metal material, and are not in contact with the inner wall of the metal tube A rotating electrical machine characterized in that the electrical continuity between a plurality of conductors and a metal tube is enhanced with respect to a conductor . The rotating electrical machine according to claim 1, wherein
The conductor has a material of a different metal from the conductor and an insulating layer on the surface of the conductor, the conductor is bundled in units, wound with the foil of the different metal, and wound with the different metal foil. A rotating electrical machine characterized in that a plurality of conductors are put together in a metal tube and subjected to pressure deformation while being heated to connect the conductors. The rotating electrical machine according to claim 1, wherein
A rotating electrical machine characterized in that the plurality of conductors and the dissimilar metal member are placed in a pipe of the metal pipe, and are subjected to pressure deformation while being heated to connect the conductors. In the rotary electric machine according to any one of claims 1 to 3,
The rotating electrical machine wherein the dissimilar metal is tin.

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