JPS5874025A - Iron core for induction apparatus - Google Patents

Abstract

PURPOSE:To suppress eddy current and improve area occupation rate of a core by arranging insulator coated amorphous magnetic foil body for each specified number of layers. CONSTITUTION:Plurality of layers of the first amorphous magnetic coil 1 in the specified thickness are laminated in an iron core for induction device. The second amorphous magnetic foil body 2 forming insulator film 2a on its single side or both sides in the thickness of 1mum or more is arranged for each of specified number of layers of said first coil 1. Thereby, such foil bodies are insulated for the specified number of layers and therefore an eddy current loss can be reduced by suppressing circulation current flowing through said second foil body 2 and an area occupation rate of iron core can also be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an iron core for induction equipment used in transformers and the like.

Currently, silicon steel plates (strips) used in electromagnetic induction AI devices such as transformers are generally treated with an insulation coating to reduce vortex flow. However, when using amorphous magnetic foil as the core material for induction equipment such as transformers, it is difficult to manufacture a sheet with a thickness of 30 to 40 μm or more compared to conventional silicon steel sheets. ing. Therefore, an iron core whose amorphous magnetic foil is treated with an insulation coating has a very poor space factor, and an iron core which is not treated with an insulation coating increases the vortex -4151 loss.

This invention was made in view of the above 1d, and by arranging amorphous magnetic foil treated with an insulating coating every predetermined number of layers, the invention is an induction device that can reduce catastrophic current loss without reducing the space factor. Provide iron cores.

I will now explain the figures. In 1llI1 figure, i
11 is a first foil having a predetermined thickness and having amorphous magnetism, and is laminated in multiple layers. (2) is shown in Figure 2 (a) (
1) As shown in (1), all surfaces must be insulated on both sides or on one side with a thickness of lμ or more! (2a) is [i! A second foil body having an amorphous magnetic property is arranged every predetermined number of layers of 711 layers of the first steel plate [11].

By forming four layers in this manner, each predetermined number of layers is insulated, so that circulating current flowing through the second foil body (2) can be suppressed and eddy current loss can be reduced.

1 This greatly increases the space factor of the iron core.

Although the laminated core has been described in the above embodiment, similar effects are expected for a wound core as well.

As described above, according to the present invention, a non-litter without insulation coating treatment is provided.
A first foil body having magnetic properties and an insulating film treatment:
By combining it with a second foil body exhibiting amorphous magnetism, it is possible to effectively suppress eddy current loss and improve the space factor of the iron core.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram showing an embodiment of this invention, Fig. 2 is a g
1 is a configuration diagram showing the main parts of FIG. 1. FIG. In the figure, +11 is the first foil body having amorphous magnetism, (2) is the second foil body having amorphous magnetism, and (2a1 is the insulating coating. The same reference numerals indicate the same or equivalent parts. Agent Nobu Sino - Figure 1 - Figure 2

Claims (1)

[Claims] 1. An iron core for induction equipment, characterized in that amorphous magnetic foils are laminated in multiple layers, and the amorphous magnetic foils treated with an insulating coating are arranged for each predetermined number of layers.