JPH0594918A - Amorphous alloy wound magnetic core - Google Patents

Abstract

PURPOSE:To reduce iron loss, and to stabilize and improve the characteristics of a magnetic core in an amorphous alloy wound magnetic core which is used as the core material of a transformer and the like. CONSTITUTION:This wound core is an amorphous alloy-wound core of one-turn cut system, the length of one-block material 1a to 1d is made longer than the length of their circumference, they are overlapped with each other, the overlapped width L is formed 10 times or more of the stack thickness of the block material. As a result, a magnetic flux is transmitted smoothly, and the turbulence of the magnetic flux can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an amorphous alloy wound iron core used as a magnetic core material for transformers and the like.

[0002]

2. Description of the Related Art In recent years, a ribbon of amorphous magnetic alloy has been used as a magnetic core material for transformers and the like. This magnetic core material essentially has excellent magnetic properties, but internal strain is usually removed by annealing in nitrogen at 360 to 400 ° C.
Improves magnetic properties.

A conventional amorphous alloy wound iron core will be described below. As shown in FIGS. 2 and 3, the winding body 2 in which a thin strip of amorphous alloy having a thickness of 0.025 mm is wound around the winding core 6 is removed by removing the winding core 6 and then tightened by a tightening jig 4. The revolving body 2 is cut to obtain an assembly 3. After applying the adhesive 5 to one or both of the cut surfaces as necessary and curing, as shown in FIG. 4, a plurality of block units 1a, 1b, 1c, 1d made up of a plurality of thin strips are used as a winding unit. After being rolled up, it is molded to obtain an overlap-type rectangular wound iron core 7.

In the figure, 8 is a block body 1a, 1b, 1c, 1
d is a void portion between each other. As shown in FIG. 5, the overlap width L of the block bodies 1a, 1b, 1c, 1d changes depending on the manufacturing conditions. Also, the block bodies 1a, 1b, 1
The stacking thickness t of c and 1d is usually 0.5 to 1.0 mm for the stacking thickness of 20 to 40 thin ribbons.

[0005]

However, the above-mentioned conventional structure has a problem that the magnetic characteristics of the iron core vary due to the instability of the overlap portion even when the seam portion is of the overlap type. It was

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide an amorphous alloy-wound iron core with reduced iron loss and stability and improved magnetic core characteristics.

[0007]

In order to achieve this object, the amorphous alloy wound iron core of the present invention is a 1-turn cut type amorphous alloy wound iron core, wherein the length of one block is more than the perimeter. The length is made longer and overlapped with each other with a width of 10 times or more of the stacked thickness of one block body.

[0008]

With this structure, the magnetic flux is smoothly transmitted and the disturbance of the magnetic flux is reduced.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

The structure of one embodiment of the present invention and the manufacturing method thereof are the same as those of the conventional example described with reference to FIGS.

For a sample having a weight of about 20 KG with a rectangular magnetic core made by winding a block body group made of amorphous alloy thin strip 2605S2 (manufactured by Allied Signal Co., Ltd.) with a width of 105, the stacking thickness t of the block body is 0.5 to 1.0 mm
Fig. 1 shows the iron loss ratio when the overlap width L is changed for the two types.

The reference iron loss ratio 100 in FIG. 1 is a value when the shape is the same and uncut. As is clear from FIG. 1, when the stack thickness t of the block body is 0.5 mm, the iron loss is stabilized when the overlap width L is 5 mm or more. Further, when the stacking thickness t of the block body is 1.0 mm, the lap width L is 10 mm and the iron loss is stabilized. That is, it is understood that the iron loss is stabilized when the lap width L is 10 times the stacking thickness t of the block body (L / t = 10).

[0013]

As is apparent from the above description of the embodiments, the present invention makes the length of one block body longer than the circumferential length, and the width is 10 times or more the stacking thickness of one block body. The iron loss is small due to the overlapping structure
Further, it is possible to realize an excellent amorphous alloy wound iron core that is stabilized and has improved magnetic core characteristics.

[Brief description of drawings]

FIG. 1 is a graph showing a lap width and an iron loss ratio of an amorphous alloy winding iron core according to an embodiment of the present invention.

FIG. 2 is a schematic front view showing a state in which a ribbon is wound around a core of an amorphous alloy wound iron core according to an embodiment of the present invention and a conventional example.

FIG. 3 is a schematic front view showing a state in which the wound ribbon of the same amorphous alloy wound iron core is fastened with a jig, cut with a cutting machine, and an adhesive is applied to the cut surface.

FIG. 4 is a schematic front view of a magnetic core composed of a group of blocks of the same amorphous alloy winding iron core.

5 is an enlarged view of part A of FIG.

[Explanation of symbols]

 1a, 1b, 1c, 1d Block body L Overlap width t Stacked thickness

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiromitsu Hara 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (1)

[Claims] 1. A one-turn cut type amorphous alloy wound iron core, wherein the length of one block body is made longer than each circumferential length so as to overlap each other, and the overlap width of the one block body. An amorphous alloy winding iron core with a stacking thickness of 10 times or more.