JPH0693404B2 - Method for manufacturing multi-pole core made of amorphous alloy - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a method for manufacturing an amorphous alloy multipole core, and more particularly to a method for manufacturing an amorphous alloy multipole core suitable as an armature core of a rotating machine.

(Background of the Invention) Amorphous metal ribbons for magnetic materials have a feature that iron loss in a high frequency region is small in both cases of a single metal and an alloy, and various electric devices such as transformers, motors,
It has been found to be extremely useful as a core for generators, meters and the like.

However, since amorphous metal is obtained by solidifying the metal from the molten state without undergoing crystallization, it is usually obtained in the form of ribbon, thin film or fine powder as a result of solidification by ultra-high speed cooling treatment. To be When it is obtained in the form of a ribbon, its thickness is usually 20 to 30 μm, and it is difficult to make it thick like ordinary magnetic materials. Conventionally, in order to manufacture a core from such an amorphous metal ribbon for a magnetic material, molding was performed by punching, but punching and laminating such an ultra-thin material has many manufacturing problems and must be particularly expensive. It has the drawback of not getting.

The present applicants proposed a toroidal core, a cut core, and a method for producing these, which make the most of the advantages of amorphous metal for magnetic materials and overcome the drawbacks, and filed a prior application (Japanese Patent Application No.
58-104180).

However, an appropriate armature core for a rotating machine or a manufacturing method thereof using such an amorphous metal has not yet been realized.

(Object of the Invention) The present invention has been made to solve the above problems.
By making full use of the manufacturing technology of toroidal cores and cut cores previously proposed for magnetic circuits using amorphous metal ribbons, there is a large degree of design freedom, easy winding, and inexpensive multi-pole cores made of amorphous alloy and its It is intended to provide a manufacturing method.

The object of the present invention is achieved by the following configurations.

(Structure of the Invention) That is, according to the present invention, after forming an annular laminate by winding ribbons made of an amorphous alloy, a part of this ring is cut off and at least a part thereof has a substantially square U-shaped cross section. Is obtained, and the two leg cores are arranged inside a casing having a closed curved cross section so that the leg portions face inward, and a method for manufacturing a closed curved multipolar core is provided.

(Description of Examples) Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 shows the tooth core (a) forming the slot portion before cutting, and (b) the shape after cutting.

In the case of manufacturing the tooth core 4 of FIG. 1B, first, as shown in FIG. 1A, a tape-shaped amorphous metal for a magnetic material having a constant width is formed on a winding frame 1 having a fan-shaped cross section. The material 2 is wound into a predetermined size and fixed. Next, as shown in FIG. 2B, the cutting is performed from a position having a radius R from the imaginary center O by using the above-described technique for producing the cut core, and further the cutting surface has a curvature R by a technique such as grinding. Finishing and manufacturing the tooth core 4. Further, as shown in FIG. 2, the tooth cores 4 are arranged in a cylindrical shape centered on O and then press-fitted inside the toroidal core 5 to complete the armature core.

In the present invention, as shown in FIG. 2, the completed armature core 4 can be slotted similarly to the winding of the conventional rotating machine, but the present invention can utilize the division method as follows. Is also one of the features. That is, referring to FIGS. 3A to 3D, first, the windings 8 are arranged on a plane as shown in FIG. 3A, and the cut cores 4 are respectively inserted as shown in FIG. 3B. After being rounded into a cylindrical shape as shown in FIG. 7C, it is press-fitted into the toroidal core 5 as shown in FIG. This winding method is particularly effective when the number of poles is small and the inner diameter of the rotor is small.

(Effects of the Invention) As described above, according to the present invention, since the punching process is not required, the core having a high degree of freedom in design can be obtained at low cost without making an expensive die. Further, the present invention is particularly effective when an expensive material is used because of high material yield.
Further, according to the method described with reference to FIG. 3, the wound armature core can be manufactured very easily without the troublesome process of inserting the armature core slot.

[Brief description of drawings]

FIG. 1 is a tooth core forming a slot portion, (a) shows a shape before cutting, (b) shows a shape after cutting, FIG. 2 shows an arrangement of respective core elements, and FIG. The drawings (a) to (d) are views for explaining a series of steps of winding processing. DESCRIPTION OF SYMBOLS 1 ... Reel, 2 ... Magnetic material, 3 ... Cutting removal part, 4 ... Tooth core, 5 ... Toroidal core, 6 ... Side plate, 7 ... Sleeve,
8 ... Winding.

Claims (1)

[Claims] 1. A plurality of legs, each of which is formed by winding a ribbon made of an amorphous alloy to form a ring-shaped laminated body, and then cutting a part of the ring so that at least a part of the ring has a portion having a substantially square U-shaped cross section. A method for producing a closed-curve multipolar core, which comprises obtaining a core and arranging the two leg cores inside a casing having a closed-curve cross section so that the legs are directed inward.