JPS5935411A - Manufacture of wound core - Google Patents

Abstract

PURPOSE:To equalize a thickness of the laminated layer and to make uniform a space occupying factor of the core by a method wherein very thin amorphous magnetic steel belts each having a widthwise deviation in its thickness are superposed with the thicker side of one belt being placed over the thinner side of the other belt. CONSTITUTION:Amorphous magnetic steel belts 4a, 4b each having a widthwise deviation in its thickness are sent out from respective coils 8a, 8b while being superposed with the thicker side t1 of the steel belt 4a being placed over the thinner side t2 of the steel belt 4b, so as to uniformalize a widthwise total thickness. The doubled steel belts are taken up through a tension roll with the starting end thereof being fixed to a bobbin 3. The wound core thus obtained has an even laminated thickness, and a space occupying factor can be uniformized because of no gap between the steel belts and hence improved, resulting in the desired magnetic characteristics.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to method C2 of manufacturing a wound core used in electromagnetic equipment, etc., and particularly relates to a method of manufacturing a wound core using an extremely thin amorphous magnetic material.

[Technical background of the invention]

Generally, grain-oriented silicon steel strips are often used as the magnetic material C2 of wound cores used in transformers, etc., but in recent years, the use of amorphous magnetic materials in place of the grain-oriented silicon steel strips has been considered. It's starting to look like this.

This amorphous magnetic material is characterized by the manufacturing process of copper strips (unlike grain-oriented silicon steel strips), in which the metal is rapidly cooled from a liquid state, and an amorphous state in which the C atomic arrangement is disordered is obtained during this rapid cooling. As a result, the oriented silicon copper strip exhibits excellent magnetic properties with significantly lower iron loss and excitation current.
However, the thickness of the copper strip made of this amorphous magnetic material is 20 to 50 microns due to manufacturing reasons, so it cannot be made very thin, and there is a thickness deviation of several microns in the width direction.

A conventional method for manufacturing a wound core using a copper strip made of this amorphous magnetic material will be explained with reference to the figures.0 Figure 1 is a perspective view showing the state of winding the copper strip, and shows the drive shaft of the winding machine (not shown). Attach 7 lunge 1 to. At the center of this flat 1 is a rectangular winding shaft 2, which is the center of the winding frame 3! =A certain rectangular hole is fitted into the winding shaft 2c, and the winding frame 3 is fixed at the 7 langes II- by thumbscrews or the like. Next, as shown in FIG. 2, a copper strip 4 of an amorphous magnetic material having a thickness deviation of 17% (not shown) in the width direction such that one plate thickness is il and the other plate thickness is t2 (χ1> odor) and C plate thickness deviation in the width direction. Rewind from uncoiler. The beginning of winding of the steel strip 4 is fixed to the winding frame 3 with adhesive tape or the like via the tension roll 5, and then the drive shaft of the winding machine is rotated to wind the cloth to a predetermined thickness, and the end of the winding is fixed with adhesive tape. If fixed at 6, the third
A wound core 7 similar to the one shown in Figure C is created.

[Problems with background technology]

However, in such a method of manufacturing a wound core, when a steel strip 4 having a thickness deviation of a few microns in the width direction is wound in a constant direction, the thickness deviation increases as the number of turns increases. The cross section of the laminated wound core 7 is as shown in Fig. 4C.
: The shape of the spirit is slanted. This is controlled by the laminated thickness of the wound core, so the thicker side (χl side) has a specified thickness of 5.
Since it has reached 2, it is tightly wound and the core space factor is high. On the other hand, on the thinner side (tl side), the specified thickness C is not continuous, so there is a gap between the wound copper strips, and the core space standard is low.

For this reason, a predetermined core weight cannot be obtained. Also, the tightening pressure of the iron core is stronger on the thicker side, but weaker on the thinner side.

This causes an imbalance in the rigidity of the core itself.

Furthermore, since the core space factor is low, the cross-sectional area through which the magnetic flux flows is small, the magnetic flux density is high, and the loss is large. Alternatively, there is also the problem that the magnetic properties of the iron core deteriorate, such as increased loss due to strong clamping pressure.

[Purpose of the invention]

The present invention improves the above-mentioned drawbacks, and aims to provide a method for manufacturing a wound core using a copper strip made of an amorphous magnetic material that makes the core space factor uniform and does not deteriorate magnetic properties.

[Summary of the invention]

The present invention provides a method for manufacturing a wound core for electromagnetic equipment which is formed by winding a copper strip made of an amorphous magnetic material. The thick side of the copper band in the width direction and the thin side of the second copper band in the width direction are overlapped and wound.

It is characterized by:

As a result, when winding copper strips made of amorphous magnetic material with thickness deviations, the thick side of one copper strip in the width direction and the thin side of the other copper strip in the width direction are overlapped to form a sheet in the width direction. By eliminating the thickness deviation, the laminated thickness becomes uniform and the space factor of the core improves (2) The magnetic properties improve.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 5 is a perspective view showing a state in which a copper strip made of an amorphous magnetic material is wound according to an embodiment of the present invention, and the flange 1 is attached to the drive shaft of a winder (not shown). 72 There is a rectangular winding shaft 2 in the center of the winding 1, and the winding frame 3 is fixed by thumbscrews etc. by fitting the square holes in the center of the winding frame 3, which are ≦2, into the winding shaft 2.
Secure to lunge 1. Next, the copper strips 4a and 4b made of amorphous magnetic material having thickness deviation in the width direction are unwound from an uncoiler (not shown) to form material coils 8α and 8b.

1 Then, overlap the thicker side tl of the steel strip 4a and the thinner side χ2 of the steel strip 4b so that the cross section has the same thickness in the width direction as shown in FIG. Two material coils 8α and 8b are arranged. Start of winding of these two stacked steel strips 4c
The copper strip 4c is fixed to the winding frame 3 using an adhesive tape or the like via a tension roll, and then the drive shaft of the winding machine is rotated 6 times in the direction of the arrow to start winding the copper strip 4c and reach a predetermined winding thickness. Wind until the end.

As shown in FIG. 7, the cross section of the wound core 9 configured in this way is composed of two copper strips, one copper strip 4a on the thicker side, tl
Then, the thinner side χ2 of another steel strip 4b is stacked on top of the other steel strip 4b to eliminate the thickness deviation in the width direction, thereby making the laminated thickness uniform. As a result, the gap between the copper strips on the thinner side of the plate is eliminated, so the space factor of the wound core is improved and a predetermined core weight can be obtained. In addition, since the lI'+ surface area with the lower core polarization ratio also has a predetermined size, the magnetic flux density becomes low and the predetermined magnetic characteristics are ≦2. Since there are no gaps between the laminated layers, the tightening pressure is evenly distributed, which increases the rigidity of the iron core.

[Brief explanation of drawings]

Figure 1 is a perspective view showing the state of a conventional magnetic copper strip when it is wound;
Figure 2 is a cross-sectional view of a magnetic copper strip made of amorphous magnetic material, Figure 3 is a perspective view of a conventional wound core, Figure 4 is a cross-sectional view taken along the line ■-■ in Figure 3, and Figure 5 is a cross-sectional view of a magnetic copper strip made of an amorphous magnetic material. FIG. 6 is a partial sectional view of the V+-Vt section of FIG. 5, and FIG. 7 is a sectional view of the wound core manufactured by the method of the present invention. 3... Winding frame 4.4α, 4b, 4c... Copper strip of amorphous magnetic material 9... Winding core (7317) Agent Patent attorney Kensuke Chika (and 1 other person) m1 drawing w42 drawing

Claims (1)

[Claims] In a method for manufacturing a wound core for electromagnetic equipment, which is formed by winding a copper strip made of an amorphous magnetic material, first and second copper strips having a thickness deviation of two in the width direction are arranged in the width direction of the first copper strip. A method for manufacturing a wound iron core, characterized in that a thicker side of a second copper strip and a thinner side of a second copper strip in the width direction are overlapped and wound.