JPS6112004A - Multipolar core made of amorphous alloy and manufacture thereof - Google Patents

Abstract

PURPOSE:To obtain the titled multipolar core, the degree of freedom on a design thereof is improved, winding thereof is facilitated and cost thereof is reduced, by arranging both-leg cores with approximately square U-shaped section sections on the inside of a casing with a closed curve-shaped section so that leg sections with U-shaped sections are directed toward the inside. CONSTITUTION:When a tooth section core 4 forming a slot section is manufactured, a tape-shaped amorphous metallic material 2 having predetermined width is wound and fixed onto a spool 1 with a fan-shaped section in prescribed size first. The whole is cut by using a technique, through which a cut core is manufactured, from a position in a radius R from a virtual center O, and finished so that a cut surface has a curvature R through a technique such as grinding, thus manufacturing the tooth section core 4. The tooth section cores 4 are disposed to the shape of a cylinder centering O, and pressed into the inside of a toroidal core 5, thus completing an armature core.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of the Invention) The present invention relates to an amorphous alloy multipolar core and a method for manufacturing the same, and more particularly to an amorphous alloy multipolar core suitable as an armature core of a rotating machine and a method for manufacturing the same.

(Background of the Invention) Amorphous metal ribbons for magnetic materials, both single metals and alloys, are characterized by low iron loss in the high frequency range, and are used in various electrical devices such as transformers, motors,
It has been found to be extremely useful as the core of generators, meters, etc.

However, since amorphous metals are obtained by solidifying metals from a molten state without undergoing crystallization, they are usually obtained in the form of thin strips, films, or fine powders as a result of assimilation through ultra-high-speed cooling processing. It will be done. When obtained in the form of a ribbon, the thickness is usually 20 to 30 μm, and it is difficult to make it as thick as ordinary magnetic materials. Conventionally, cores have been manufactured from amorphous metal ribbons for magnetic materials by punching, but punching and laminating such ultra-thin materials poses many manufacturing problems and is particularly expensive. The disadvantage is that it does not provide any benefits.

The present applicants have proposed a toroidal core, a cut core, and a method for manufacturing the same, which take advantage of the advantages of amorphous metals for magnetic materials and overcome their drawbacks, and have previously filed an application (Japanese Patent Application No. 104,180/1982).

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

(Object of the invention) The present invention has been made to solve the above-mentioned problems.
By making full use of the manufacturing technology of toroidal cores and cut cores, which were previously proposed as magnetic circuits using amorphous metal thin strips, we have developed a multipolar core made of amorphous alloy that has a large degree of design freedom, is easy to wind, and is inexpensive. The purpose is to provide a manufacturing method.

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

(Structure of the Invention) That is, the present invention provides a double-legged core made of a laminate of amorphous alloy ribbons and having at least a portion of a substantially rectangular U-shaped cross section, inside a casing having a closed curved cross section. After forming an annular laminate by winding the amorphous alloy multipolar core in which the legs of the U-shaped cross section are arranged inward and the amorphous alloy ribbon, a part of this ring is cut off. An amorphous product characterized by obtaining a double leg core having at least a portion thereof having a substantially square U-shaped cross section, and arranging the double leg core inside a casing having a closed curved cross section so that the leg portions thereof face inward. This is a method for manufacturing an alloy multipolar core.

(Explanation of Examples) Hereinafter, the present invention will be explained in detail based on the drawings.

FIG. 1 shows the toothed iron core forming the slot part, with (a) showing the shape before cutting and (b) showing the shape after cutting.

1 in (b) of the same figure. When manufacturing the toothed core 4, first, as shown in FIG.
A tape-shaped amorphous metal material 2 for magnetic material having a constant width is wound and fixed to a predetermined size. Next, as shown in the same figure (b), cutting is performed from a position at a radius R from the virtual center O using the above-mentioned technique for producing a cut core, and then the cut surface is made to have a curvature R by a method such as grinding. Finish and manufacture tooth core 4. Furthermore, as shown in FIG. 2, the toothed cores 4 are arranged in a cylindrical shape centered at O, and then press-fitted inside the toroidal core 5 to complete the armature core. FIG. 3 shows an example of a method for maintaining the shape of an armature core according to the present invention.

If desired, it is fixed with a sleeve 7 made of a material that can be easily stretched, such as aluminum, through the side plate 6 as shown in the figure. In this way, it is possible to process the inner diameter and outer shape according to requirements such as dimensional accuracy, and after processing, heat treatment can be performed to remove all distortions.

In the present invention, as shown in FIG. 3, it is also possible to insert a strip into the completed armature core 4 in the same manner as the winding of a conventional rotating machine, but in the present invention, the completed armature core 4 is divided into One of its features is that it can be used in various ways. That is,
Referring to FIGS. 4(a) to 4(d), first arrange the windings 8 on a plane as shown in FIG. 4<8), insert the cut cores 4 into each as shown in FIG. After rolling it into a cylindrical shape as shown in the same figure (C), it is press-fitted into the toroidal shear 5 as shown in the same figure (d). This winding method is particularly effective when the rotor has multiple poles and a small inner diameter.

(Effects of the Invention) As explained above, according to the present invention, since a punching process is not required, a core with a high degree of freedom in design can be obtained at low cost without making an expensive cutting die. In addition, heat treatment and winding after manufacturing are easy, and the material yield is high, so it is particularly effective when using expensive materials.

[Brief explanation of the drawing]

Fig. 1 shows the toothed core forming the slot portion, (a) shows the shape before cutting, (b) shows the shape after cutting, Fig. 2 shows the arrangement of each core element, Fig. 3 4A to 4D are diagrams illustrating an example of a method for maintaining the shape of a multipolar core, and FIGS. DESCRIPTION OF SYMBOLS 1... Winding frame, 2... Magnetic material, 3... Cutting removal part, 4... Teeth core, 5... Toroidal core, 6...
・Side plate, 7...Sleeve, 8...Winding. Patent Applicant Mitsui Petrochemical Industries Co., Ltd. Agent Patent Attorney Tatsuo Ito Agent Patent Attorney Tetsuya Ito II! III Section 4 (Q) (b)

Claims (1)

[Scope of Claims] 1. A two-legged core made of a laminate of amorphous alloy thin strips and having at least a portion thereof with a substantially rectangular U-shaped cross section is placed inside a casing having a closed curved cross section with the U-shaped cross section described above. A closed curved multipolar core formed by arranging the legs of the inward direction. 2. After winding amorphous alloy ribbons to form a ring-shaped laminate, a part of this ring is cut off to obtain a double-legged core having at least a part of it with a substantially rectangular U-shaped cross section. A method for producing a closed curved multipolar core, comprising arranging both leg cores inside a casing having a closed curved cross section, with the leg portions facing inward.