JPS61170011A - Magnetizing device - Google Patents

Abstract

PURPOSE:To simplify a manufacture and to reduce a loss in a butt portion by covering the butt portion of a core end with a magnetic body casing as well as by composing a closed magnetic circuit after bending a core through using elasticity of an amorphous ribbon. CONSTITUTION:A large number of amorphous ribbons 1 are laminated to form a core 2, which is installed or unified by the bobbins 3. A coil 4 is wound on a surface of the bobbin 3 by using a winder A of an ordinary flyer method, and an end of the coil 4 is fixed on terminals 30 and 31 implanted in a flange portion of the bobbin 3. After that, both end faces of ends 20 and 21 of the core 2 are butted in a ferrite casing 5, a but portion is prevented from separating by using such as an adhesive agent if necessary. As a closed magnetic circuit is formed through butting both the ends of the core 2 after winding the coil 4 like this, no special winder is needed in winding the coil 4 and manufacturing efficiency is extreamly improved. As this device has a structure in which the butt portion is covered with the casing 5 made of magnetic material, a flux leakage is almost prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to electromagnetic devices such as inductors and transformers.

[Background technology]

To wind a winding around a closed magnetic circuit core (including one with a slight air gap) such as a toroidal core, a normal flyer type winding machine cannot be used, and generally a toroidal winding machine etc. A special dedicated machine is used, but this winding machine for the closed magnetic circuit core of Japanese cypress has a slow winding speed and is extremely expensive to manufacture.

[Purpose of the invention]

This investigation was conducted in view of these shortcomings, and the ordinary 7
To provide an electromagnetic device having a closed magnetic circuit closing configuration with small loss and allowing use of a simple winding method called a one-way wire winding method.

[Disclosure of the invention]

The present invention will be explained below based on embodiments shown in the figures.

Figures Jg1 to 3 show an embodiment of the present invention, in which a core 2 is formed by laminating a large number of amorphous ribbons lt, and a pobbin 3 is attached to the core 2 or integrally molded. In the state shown in FIG. 1, as shown in FIG. 2, the pobbin 30 is wound 4t times on the front side using a normal flyer type winding MAt. The ends of the winding 4 are locked to terminals 30 and 31 implanted in the collar of the pobbin 3. After that, the end s20 of the core 2
．． The end faces of 21 are abutted against each other in a ferrite casing 5, and an adhesive or the like is used as necessary to prevent the abutted portions from coming apart.

In this way, the electromagnetic device configured in this embodiment can form a closed magnetic path by abutting both ends of the tip 20 after winding the winding 4, so a special winding machine is not required for winding winding &14. figure,
Manufacturing efficiency is greatly improved.

In addition, since the abutting portion is made of Enoki 1cjsII construction with the casing 5 made of a magnetic material, leakage of magnetic flux is almost eliminated. In addition, in this embodiment, by gradually increasing the length of the *peiiv bond 1 from the inside to the outside, the end surfaces of both ends s20 and 21 of the core 2 become substantially flat when they are butted together, making it easier for them to come into close contact with each other. Although 4a is designed to improve the feel, as mentioned earlier, there may be some air gap at the abutting portion.

FIG. 4 shows another embodiment of the present invention, in which a bobbin 3 is made of a magnetic material such as ferrite, a winding 4 is wound around the bobbin 3, and a core 2 is formed by laminating an amorphous ribbon 1. is attached to the bobbin 3 so that both ends 20 and 21 of the bobbin are butted together inside the bobbin 3. Incidentally, as shown in FIG. 5, two cores 2.2 may be used, and a bobbin 3.3 may be disposed at the abutting portion of each core.

6 to 8 show still another embodiment of the present invention, in which the near 2 is formed into a toroidal shape, and the winding 1iiA4 is wound over substantially the entire circumference of the toroidal core 2 before butting. This is an example in which the winding 1ii4 is wound in advance around the core 2 in the state shown in FIG.

[Effects of the Invention J As described above, the present invention utilizes the elasticity of the amorphous ribbon to bend the core to form a closed magnetic path, and also holds the joint portion of the core end with a magnetic casing. Therefore, the winding can be done without being disturbed by the closed magnetic circuit core, which not only simplifies manufacturing, but also reduces loss at the butt part, and also protects the butt part. Nine.

[Brief explanation of drawings]

1 to 3 show embodiments of the present invention.
The figure is a perspective view of the main part, Figure 2 is a schematic diagram showing an example of a winding device for ore winding, Figure 3 is a perspective view of the whole, and Figures 4 and 5 are different embodiments of the present invention. This is a perspective view showing the 6th
Figures 8 to 8 show still other embodiments of the present invention, in which Figure i46 is a perspective view, Figure 7 is a schematic diagram showing how the winding is wound around the core, and Figure 8 is a schematic front view. It is.

Claims (1)

[Claims] (1) A closed magnetic circuit core formed by abutting both end surfaces of a core formed by laminating a large number of amorphous ribbons,
An electromagnetic device comprising: a magnetic casing that covers the abutting portion; and a winding attached to the closed magnetic circuit core.