JPS5887808A - Wound core - Google Patents

Abstract

PURPOSE:To actually adopt a highly permeable, low iron loss, amorphous magnetic thin belt in a transformer with silicon steel belt arranged on the outside of the amorphous magnetic thin belt for reinforcing the belt. CONSTITUTION:An iron bobbin 5 is arranged in window holes 3a of the primary and secondary windings 3. Subsequently, a hoop 6 in the form of an amorphous magnetic thin belt is wound on the periphery of the bobbin 5. The winding is troidally conducted by hooking the hoop 6 onto a winding transfer roller 7 and by leading the roller in and out of the window hole 3a of the coil in the direction of an arrow. The troidal winding can be carried out by moving the transfer roller 7 within 20% of spacing where an oriented silicon steel belt located on the periphery of the amorphous magnetic thin belt. Furthermore, by inserting an annealed wound core 1 on which the oriented silicon steel belt has been wound into the window hole 3a of the coil, the belt is wound on the periphery of the wound core 2.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a low-loss wound core using an amorphous magnetic ribbon.

Among the amorphous metal magnetic materials developed in recent years, some have excellent magnetic properties as iron core materials, and in particular, their core loss value is much lower than that of conventional grain-oriented silicon steel strips. Research is underway to use the material in the wound cores of constant-force transformers and instrument transformers.

However, (-1) Due to the manufacturing process, the thickness of this amorphous metal magnetic material must be made thicker like a grain-oriented silicon steel strip, and it is thought that the maximum thickness is about ioum. Currently, only thin strips of about 40 to 60 μm are produced.However, such extremely thin amorphous magnetic thin strips have low rigidity, making it difficult to maintain their shape as wound cores during intermediate breaks. Therefore, it is easy to cause distortion due to external force. Therefore, the magnetic properties are likely to be significantly deteriorated by external force.

The present invention has been made with the above points in mind,
In order to be able to actually be used in transformers with high permeability and low core loss, amorphous magnetic ribbons are characterized by the fact that silicon horizontal bands are placed throughout the outside of the amorphous magnetic ribbons for reinforcement. Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1st
The figure is a front view of a main body of a transformer using a wound iron core according to an embodiment.

In Fig. 1, 2 is the outer circumference of the inner part of the amorphous wound core on the core bobbin 5. It is. 4
is a core fastener that clamps and fixes both the upper and lower 1u11 ends of the wound cores 1 and 2 2).

The winding core is assembled as follows. As shown in Figure 2, the sterile composition was prepared in advance and the secondary volume bond 5
The iron core bobbin 5 is placed in the window hole 5a, and then a hoop material 6 of an amorphous magnetic ribbon is wound around the outer circumference Vr of the bobbin 5.

This winding is done by toroidal winding, which is carried out by moving the hoop material 6 in and out of the window hole 3a of the coil in the direction of the arrow 7a. By moving the above-mentioned moving roller 7, WLr is created by moving the moving roller 7 to cover 20% of the space on the outer periphery of the toroidally wound amorphous magnetic ribbon.
Further, a directional stone (raw steel, 111) is inserted into the entire coil window hole 3a of the annealed wound core 1 which has been subjected to S turns, and wound around the outer circumference of the wound iron core 2. Specifically, as shown in FIG. As shown in FIG. 4, the wound core 1 is inserted around the outer periphery of the wound core 2 in the coil window hole 5a, and then the ends 1at 1a''k are brought together and closed.

FIG. 5 is a plan view of another embodiment. In this embodiment, the amorphous magnetic ribbon 20 is entirely wound around the center of the core, and the grain-oriented silicon steel strips 10 are wound around both ends of the wound core. The roller 7 is fully moved and wound in a toroidal manner using the space where the roller 7 is to be placed.

In the above-mentioned winding core, the amorphous magnetic copper strip is sandwiched between the core bobbin, the oriented steel strip, and the mechanically strong parts such as the destand beads. External forces such as their own weight are supported by these mechanically strong parts and are not applied to the amorphous magnetic ribbon wound inside.

As is clear from the above explanation, the present invention allows a wound core to be constructed without sacrificing the advantages of amorphous magnetic ribbons with excellent magnetic properties, and therefore the practical application of this kind of wound core is possible. It is easy to use the iron core, and the practical effect is noticeable.

[Brief explanation of the drawing]

Figure 1 is a front view of the main body of the transformer according to the embodiment of the present invention, Figure 2 is an explanatory diagram showing the assembly process, the third factor is an explanatory diagram showing the outside part being assembled, and Figure 4 is the main part. An enlarged view showing
FIG. 5 is a plan view of another embodiment. 1/10: Grain-oriented silicon steel strip (outer 1111171~min),
2.20: Amorphous magnetic ribbon (inner part)

Claims (1)

[Claims] 1. In a wound core constructed using an amorphous magnetic ribbon with high magnetic permeability and low core loss, the wound core is composed of an inner part and an outer part, and the inner part is made of an amorphous magnetic ribbon. The outer part i consists of a magnetic band
Claim 1, characterized in that the wound core 02 is made of laminated steel strip, the inner part being wound around the inner periphery of the wound iron core, and the outer part being wound around the outer periphery of the inner part. Wound core as described. 3. The wound core according to claim 1, in which the outer portion has winding traces on both sides of the inner 1 μm portion.