JPH02161704A - Wound core - Google Patents

Abstract

PURPOSE:To fix an iron core without damaging it by winding an amorphous alloy sheet to form a wound core, and winding a retaining plate having excellent comfortability to the amorphous alloy, around the external periphery of the wound core. CONSTITUTION:When amorphous material is wound and an iron core 1 is formed, a soft metal plate (Al plate) comformable with the iron core shape or a very thin non-magnetic metal plate (0.1-0.3mm thick stainless plate) is wound on the outermost periphery, as a retaining member 4. The outer periphery thereof is fixed by a fastening band 3. Since the amorphous material is very thin, rigidity of the whole iron core is little, and the whole iron core material is uniformly fastened without damaging the surface. By inserting a retaining member also into the innermost periphery, the iron cor material is not damaged at the time of coil assembling.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a wound core for a transformer using an amorphous material, and particularly to a wound core of thin sheet metal.

[Prior art]

The grain-oriented silicon steel strip conventionally used as material for wound cores has a thickness of about 0.2 to 0.38 mm and a loss value of about 0.5 to 0.65 W/Kg (1°3T150H2). . On the other hand, the loss value of amorphous materials is 1/3 to 1/4 compared to these.

However, due to the manufacturing technology of the material, the thickness of the plate is 0.025 to 0.03
When it is thin and annealed at 350-400°C to adjust magnetic properties, its properties become brittle and there are difficulties in workability. In addition, after winding and laminating the wound core, the outer periphery is generally tightened and fixed with a metal band, etc., but those made of amorphous material are brittle and may be damaged by tightening the band. There is a concern that the characteristics may deteriorate, and it is difficult to tighten the entire part uniformly.

[Purpose of the invention]

An object of the present invention is to fix and integrate a thin-walled metal plate laminated core constituting a wound core using an amorphous material without damaging the core.

[Summary of the invention]

The present invention involves winding a soft metal plate compatible with an amorphous material or a thin non-magnetic metal plate around at least the inner and outer peripheries of the iron core, and tightening the top with a band.
Fix the iron core.

(Embodiment of the invention) Fig. 1 is a conceptual diagram of a transformer body using a wound core.
is the iron core, 2 is the coil, and 11 is the tightening band.

4 shows the joint part of the iron core. The present invention uses a soft metal plate (for example, temporary aluminum) that conforms well to the shape of the core, or an ultra-thin non-magnetic metal plate (for example, 0.5 mm) for the outermost periphery or both the inner and outer peripheries during winding during manufacturing of the amorphous core. 1
A stainless steel plate (approximately 0.3 mm thick) is wound around as a supporting material, and a band is tightened around the outermost periphery to fix the iron core.

An example of this is shown in Figure 3. With this structure, the fragile foil-like metal plate is wrapped in a metal plate with good conformability, and even if the band is firmly tightened on the surface, the iron core metal body can be tightened uniformly. There is no risk of damaging the surface of the core material, and if it is made of non-magnetic metal, it will not cause an increase in core loss. On the other hand, if a supporting material is inserted around the inner periphery of the crystal, damage to the core material can be prevented when the coil is assembled. It is possible to do so.

Wound cores made of grain-oriented silicon steel sheets can easily maintain their original shape after forming and annealing, but cores made of amorphous materials lack rigidity as a whole because the material is extremely thin, making it difficult to assemble coils. Even when the iron core is inserted into the iron core, it bends as shown by W in FIG. 2 (indicated by a broken line), making it difficult to maintain the original shape of the iron core.

〔Effect of the invention〕

According to the present invention, the band can be easily and effectively tightened when fixing the wound core from the outer periphery, and the core material can be firmly tightened without damaging the core material.

[Brief explanation of the drawing]

Fig. 1 is a conceptual diagram of the main body of a wound core transformer, Fig. 2 is a plan view showing the state of deformation of the core made of amorphous material during morning stand-up, and Fig. 3 is a front view of the main body of the wound core transformer in which the present invention is implemented. It is a diagram. 1; Winding core 2: Coil 3; Band 4; Core joint portion 5; Support plate

Claims (1)

[Claims] 1. A supporting plate having good compatibility with the amorphous alloy is wound around at least the outer periphery of the wound amorphous thin ribbon in a wound core using an amorphous alloy ribbon, and the supporting plate arranged on the outer periphery is attached to the outer periphery. A wound iron core that is tightened by a band wound around the core.