JPS5852810A - Electromagnetic device - Google Patents

Abstract

PURPOSE:To permit an iron core to be formed into a shape providing an excellent magnetic permeability, an easy manufacture and a high degree of freedom, and to enable an electromagnetic device to be more compact, by compression- molding a filamentous amorphous magnetic material. CONSTITUTION:An amorphous magnetic material is formed into a filamentous shape having a width not larger than 10mu and a thickness not larger than 10mu, for example. Then, an enameled copper wire is crumpled into a ball and inserted into a container of a certain shape and is then compressed into the shape of the container, thereby to form an iron core shape having a high degree of freedom. Electromagnet yokes 4, 5 constituted by legs 41-43, 51-53, respectively, are bonded together at the leg parts 41, 51; 42, 52 and 43, 53 to reach completion. The iron loss is on the order of 1/4-1/5 of that in a silicon steel plate, so that the magnetic permeability is excellent. The compression molding permits an easy manufacture. The filamentous amorphous magnetic material can advantagenously be handled in the same manner for powder. Thereby, it is possible to form an iron core shape having a high degree of freedom, and an electromagnetic device can be made more compact.

Description

[Detailed description of the invention] The present invention relates to an electromagnetic device made of an amorphous magnetic alloy.

Conventionally, silicon steel plates have been commonly used as magnetic materials for electromagnetic devices. However, the silicon steel plates are stacked to form the desired shape, and the steel plates are secured together with caulking capes. Furthermore, in the current trend of downsizing of ultra-LSIs and the like, the volume occupied by the space is one of the difficulties.

Recently developed magnetic materials include amorphous magnetic alloys. The iron loss is much better than that of silicon steel sheet. However, the shape of an amorphous magnetic alloy that can be made with current equipment, such as Amaru 7 As magnetic material, is 30-4tOμ in thickness and 30W in width.
5 and is so thin that it is difficult to process it into a plate shape. Because of such a shape and size, it is conceivable to apply it to a wound core, for example, but since it requires one winding, it is extremely troublesome to manufacture it.

An object of the present invention is to provide an electromagnetic device made of an amorphous magnetic alloy that eliminates the drawbacks of the conventional device. FIG. 1 is a perspective view of the conventional device.

York iron core 10 and! Iron core m is made of silicon steel plate l,
1 Although not shown in the figure, the silicon steel plates were caulked, bolts and nuts were tightened, and bonded with adhesive, etc., which made manufacturing difficult. The generation of magnetic flux due to turns is also lower than that of amorphous magnetic materials.

The iron loss was 3~# times higher, and conversely, 3~3 times the volume was required to obtain the same magnetic flux.

FIG. 2 is a perspective view of an embodiment of the present invention.

Since amorphous magnetic materials can only be molded into extremely thin plate-like shapes, attempts are being made to take advantage of this disadvantage and take advantage of the electrical properties of amorphous magnetic materials.

For example, ama/I-7 as is used as the amorphous magnetic material,
This is made into a thread having a width of IOμ or less and a thickness of 10 seconds or less.

Then, we apply the principle that if an enamelled copper wire is rolled up and inserted into a container of a certain shape and compressed, it will take on the shape of that container.

A highly flexible iron core shape is created by inserting and compressing Amaru7Asu in the form of a thread into a container of the required shape. Form an electromagnet yoke consisting of 3J and 1 both legs,! Hey Hiroko.

By joining j, shun, and 3J, K is completed.

Although not shown in the drawings, a coil may be inserted into the leg before the leg is joined, or the coil may be wound after the leg is joined.

FIG. 3 is a perspective view of another embodiment of the present invention.

In this embodiment, a non-magnetic material t is inserted between the joint of one leg, for example, between the legs t2 and S-, to serve as a gap adjustment piece, and the thickness t of the non-magnetic material t is arbitrarily determined as necessary.

The electromagnetic device according to the present invention is suitable, for example, for a yoke of a discharge lamp ballast.

Note that the thread-like Amaru7Ath magnetic material may have a diameter of IOμ or less, but the scope of the present invention is not limited thereto.

Thus, according to the present invention, it has good magnetic permeability of about 1% compared to silicon steel sheet with iron loss, is easy to manufacture because of compression molding, and is advantageous in handling in the same place as powder. , create a core shape with a high degree of freedom.

And it can be made smaller.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional device, FIG. 2 is a perspective view of an embodiment of the present invention, and FIG. 3 is a perspective view of another embodiment of the present invention! It is a perspective view of an example. l, Co...Silicon steel plate io...Yoke iron core m...I iron core 3...Coil Hiro, j...Yoke compression molded with thread-like amorphous magnetic material $/54LJ,! /~S3...those legs 6.
...Non-magnetic material for gap adjustment. Applicant's agent Inomata Kiyoshi Procedural amendment (method) March 1980 Commissioner of the Japan Patent Office Shima 1) Haruki Tono1, Indication of the case Showa era Patent Application No. 1512332, Name of the invention Electromagnetic device 3. Patent applicant related to the person making the amendment

Claims (1)

[Scope of Claims] 1. An electromagnetic device 〇λ characterized by an iron core formed by compression molding an amorphous magnetic material tube in the form of a thread, and a gap adjustment comprising a part of the compression molded magnetic path made of a nonmagnetic material. 2. The electromagnetic device according to claim 1, further comprising a piece inserted into the electromagnetic device. 3. Claim 7 or 2, characterized in that Amaru 7As alloy is applied as the amorphous magnetic material;
Electromagnetic device described 〇