JPH09163642A - Flat type motor and manufacture of its stator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manufacture a yoke part member and provide a stator part mem ber which can be easily manufactured at a low cost, without using a complicated process with laminated steel plates for a flat type motor. SOLUTION: A stator 2 generating a revolving magnetic field, and a rotor consisting of an iron based disc to which the revolving magnetic field is applied by the stator 2 are installed. The rotor 1 is rotatably supported by a retaining means different from the stator 2, and built in separably from the stator 2. It is constituted by winding coils 3 around a laminated core which is formed by molding after an electromagnetic steel belt subjected to insulation treatment is wound. After the electromagnetic steel belt subjected to insulation treatment is wound, the belt is dipped in melted aluminum alloy solution of low melting point. Parts between the layers of the belt are impregnated with the alluminum alloy, and the belt is molded. The laminated core consisting of composite of the molded core material-aluminum alloy is machined in a desired form.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat type motor and a stator manufacturing method therefor, in which a yoke composed of a laminated iron core having a complicated shape is easily manufactured, and a required winding is formed on the yoke to form a stator. The purpose of the present invention is to provide a low-cost yoke.

[0002]

2. Description of the Related Art It is a well-known phenomenon that eddy currents are generated inside an electric conductor placed in a changing magnetic field or an electric conductor moving in a uniform magnetic field. This causes a decrease in efficiency and heat generation in the case of an AC transformer or an electric motor that moves in a magnetic field. A general eddy current loss is expressed by the following equation: P _e = KB _m f ² S / ρL where P _e is the eddy current loss, K is the proportional constant, and B _m is the maximum generated in the conductor by the alternating current. Magnetic flux density, f is the frequency of the alternating current, S is the cross-sectional area of the circuit through which the eddy current flows, ρ is the electrical resistivity of the circuit through which the eddy current flows, and L is the length of the circuit through which the eddy current flows. Magnetic flux density is a quantity related to the magnetic permeability of a material. Therefore, in order to reduce the eddy current loss as much as possible under a constant magnetic flux density, it is necessary to use a material having a small thickness and a small cross-sectional area and a large electric resistivity.

Therefore, a material having a large electric resistance is used for an iron core of a transformer or an electric motor for which a large magnetic flux density is desired, and thin plate-like materials are laminated with an insulating layer interposed so as to prevent an eddy current from flowing. It has been devised, such as using the one formed. Generally, iron, nickel, and cobalt alloy materials, which are good core materials, have low electric resistance, so thin plates of such materials and appropriate insulators are alternated so that the plate surface is parallel to the direction of magnetic flux during use. Often used as a stacked body. For this purpose, a thin plate core material (magnetic material) on the surface of which an organic or inorganic insulating layer is formed beforehand
Are commercially available.

However, when a laminated body having a certain shape is formed by laminating thin plates, the shape of the laminated body is restricted from the viewpoint of manufacturing cost such as the number of steps. For example, like a typical laminated core (iron core) of a rectangular transformer, a laminated body formed by alternately laminating a plurality of thin plates of the same or of several shapes is a press metal for forming a thin plate for lamination. The number of molds is small, and the stacking work is easy. However, when manufacturing a laminated body having a shape that requires many types of thin plates, a lot of man-hours are required for forming the thin plates, and particularly when pressing is used, a large number of molds are required. And it will be a very high manufacturing cost product.

To give a concrete example, a laminated body in the thrust direction as shown in FIG. 4 can be prepared by preparing a large number of thin plates of one type and laminating in the thrust direction.
A laminated body that is laminated in the radial direction as shown in FIG. 3 requires a large number of thin plates of slightly different sizes, which is very uneconomical. In the figure, 2 is a laminated stator, and 3 is a coil.

An object of the present invention is to solve the above-mentioned drawbacks and to solve the problems of the prior art by a method that does not rely on a complicated process such as a laminated steel sheet for a flat type motor and the like. The present invention provides a stator member that is manufactured at low cost and is easy to manufacture.

[0007]

The present invention has been made to solve the above-mentioned conventional problems, and in a flat type motor according to claim 1 of the present invention, a stator for generating a rotating magnetic field, A rotor made of an iron-based disk on which a rotating magnetic field acts from the stator, the rotor being rotatably supported by another supporting means different from the stator and detachably assembled from the stator, The stator is formed by winding a coil on a laminated iron core formed by winding an insulating-treated electromagnetic steel strip and then molding it.

In the method for manufacturing a stator according to the second aspect of the present invention, after the insulating-treated electromagnetic steel strip is wound, it is immersed in a molten low melting point aluminum alloy liquid,
A step of impregnating each layer of the rolled electromagnetic steel strip with an aluminum alloy and molding, and a step of machining a laminated iron core made of a composite of the molded iron core material-aluminum alloy into a desired shape, Manufactured from.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below.
Referring to the attached drawings, FIG. 1 shows a structure of a flat type motor using a stator according to an embodiment of the present invention, and FIGS. 2 and 3 are views for explaining a stator manufacturing method of the present invention. .

The present invention relates to a stator of a flat AC motor of a type in which a rotor and a stator face each other, which can be manufactured economically. An example of a typical flat type AC induction motor is shown in FIG. In the figure, 1 is a rotor, 2 is a stator, 3 is a coil, 4 is a shaft, 5 is a bearing, and 6 is a stator base. As shown in the figure, the stator 2 is a type of laminated body that is laminated in the radial direction. Therefore, in order to manufacture this laminated body, a large number of thin plate molded products that have a shape of the circumferential side surface and are reduced in a similar and quasi-continuous manner are required. Takes too much. Therefore, in the present invention, a cylindrical laminated body having a predetermined thickness as shown in FIG. 3 is manufactured, and this is subjected to machining such as cutting and grinding to be molded into a predetermined shape.

[0011] Here, since it is difficult to machine the unprocessed product (laminate) which is moved or deformed during machining such as cutting by simply laminating, it is difficult to perform machining between the layers of the laminate before machining. , Aluminum alloy or die-cast alloy is infiltrated and cooled in a temperature range (800 ° C or less) that does not damage the insulating layer formed on the surface of the thin plate core material, and a strong composite is manufactured.

Specifically, the present invention relates to a low melting point aluminum alloy financial liquid or a melted die-cast compound financial liquid obtained by winding a band-shaped core material made of silicon steel plate or the like whose surface is insulated. After immersing the alloy in the inside and infiltrating the alloy between the laminated layers to prepare a cooled and solidified core material-alloy composite 20 as shown in FIG. 2 and machining it into a predetermined shape,
The stator of the flat AC motor as shown in FIG. 3 is manufactured.

Since the stator is manufactured in this manner, the stator having the laminated yoke can be easily manufactured at low cost.

[0014]

According to the present invention, as described in detail in the embodiments, the manufacturing method of the stator member does not require the machining of lamination, so that the mass productivity is improved and the production can be performed at a low cost. Also, it is possible to manufacture a three-dimensionally complicated shape.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a structure of a flat type motor using a stator according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating a stator manufacturing method of the present invention.

FIG. 3 is a perspective view showing a radial laminated body stator of the present invention.

FIG. 4 is a perspective view showing a conventional thrust direction laminated body stator.

[Explanation of symbols]

 1 rotor 2 stator 3 coil 4 shaft 5 bearing 6 stator base 20 composite S slit

Claims (2)

[Claims] 1. A stator provided with a rotating magnetic field, and a rotor composed of an iron-based disk (IRON-DISK) on which the rotating magnetic field acts, the rotor being provided with a supporting means different from the stator. It is rotatably supported by and is detachably assembled from the stator, and the stator is formed by winding a coil on a laminated iron core formed by winding an electromagnetic steel strip that has been subjected to an insulation treatment and then molding the electromagnetic steel strip. Flat type motor. 2. A step of winding an insulating-treated electromagnetic steel strip and then immersing it in a molten low-melting aluminum alloy liquid and impregnating each layer of the rolled electromagnetic steel strip to mold it.
And a step of machining a laminated core made of the composite of the molded core material and an aluminum alloy into a desired shape.