JPH09219321A - Electric equipment iron core - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To provide a winding core of an electric device with a rectangular four-cornered radius formed by a hard and brittle low magnetostriction thin silicon steel plate strip,
The purpose of the present invention is to reduce the material cost and the manufacturing cost by using materials having different plate thicknesses in the inner peripheral portion and the outer peripheral portion. SOLUTION: A low-magnetostriction silicon steel plate of 0.1 mm is wound around an iron core of an inner circumference to a predetermined thickness, and a low-magnetostriction silicon having the same width of 0.3 mm is wound around an outer circumference of the iron core. Wind using a steel strip. A wound iron core configured as described above.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric machine comprising a so-called hard and brittle low-noise low-magnetostriction thin silicon steel sheet strip for low noise, in which the thickness of the steel sheet strip is changed between the inner and outer peripheral portions of the wound core. Regarding the iron core of equipment (transformer, void reactor).

[0002]

2. Description of the Related Art A conventional winding iron core of a low noise type electric device will be described with reference to FIG. Conventional electric equipment iron core 1
In A, for example, the iron core was formed only by a 6.5% silicon steel strip 1 having a thickness of 0.1 mm. Although not shown, it was composed of only a 0.3 mm, 6.5% silicon steel strip.

[0003]

Since a low magnetostriction thin silicon steel sheet strip is hard and brittle, a thin steel sheet is used.
If the radius of curvature of the four corners of the inner peripheral portion is not set to a predetermined appropriate value, problems such as cracking will occur. Therefore, for example, the iron core was formed only with a thickness of 0.1 mm. Therefore, the price of 0.1 mm is expensive, so the price of the product was high. For example, if it is made of only 0.3 mm, the material cost will be low, but cracks will occur unless the radius of curvature of the four corners of the inner peripheral part is made relatively large, so it is necessary to make the radius of curvature large and There was a drawback that it became large and heavy. The present invention has been made to eliminate these problems.

[0004]

[Means for Solving the Problems] A low magnetostriction thin silicon steel strip (for example, a thickness of 0.1 mm and a 6.5% silicon steel strip) is first wound, and when a predetermined winding thickness is reached, the same width is thicker than that. 1. Wind a low magnetostriction thin silicon steel sheet band (for example, 0.3 mm in thickness, 6.5% silicon steel sheet).

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The inner peripheral portion has a predetermined winding thickness of 0.1.
Since it is wound with a thin silicon steel strip of mm, cracks do not occur even if the radius of curvature of the four corners is small. Further, the outer circumference of the predetermined wound thickness iron core is wound with a 0.3 mm silicon steel strip, but cracks do not occur even if the radius of curvature of the four corners increases, and the mass does not increase. That is, the product price can be reduced without significantly reducing the low noise effect.

[0006]

Embodiments will be described with reference to the drawings.
1 and 2 in FIG. 1 and FIG. 2, for example, 0.1 mm, 6.5%
An iron core obtained by winding a thin low-magnetostriction silicon steel sheet strip 1 of silicon in a rectangular shape with a predetermined thickness Tmm with four corner radii and having the same width thicker than the silicon steel sheet, for example, 0.3 mm, on the outer periphery thereof.
Wind the 6.5% silicon steel strip 2. The outer radius of curvature R2 of the iron core 1B formed of the silicon steel strip of No. 1 is the sum of the inner radius of curvature R1 and the thickness of winding Tmm due to the winding thickness Tmm, and the outer radius of curvature becomes large. The low magnetostrictive silicon steel strip 2 can also be wound without cracks. Naturally, the inner bending radius of the iron core 2A wound by 0.3 mm is equal to R2.

[0007]

Since the present invention is constructed as described above, it is possible to use a low magnetostrictive silicon steel strip of 0.3 mm which is low in material cost, and the number of windings can be reduced from 0.1 mm. . In addition, the outer diameter is smaller than the iron core of only 0.3 mm, and the product price can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view of an iron core of a rectangular electric device according to the present invention.

FIG. 2 is a perspective view of the iron core around the outer periphery of the present invention when it is wound.

FIG. 3 is a perspective view of an iron core of a conventional rectangular electric device.

[Explanation of symbols]

 1 Ultra-thin (eg 0.1 mm) low magnetostrictive silicon steel strip 1A Iron core 1B Inner iron core 2 0.3mm low magnetostrictive silicon steel strip 2A Outer iron core 3 0.3mm low magnetostrictive silicon steel strip Material drum R1 Curvature radius R2 Curvature radius T Inner core winding thickness

Claims (2)

[Claims] 1. An electric device comprising a low-magnetostriction thin silicon steel strip wound in a rectangular shape, in which an extremely thin silicon steel strip is wound a predetermined number of times on the inner peripheral portion and the same width thicker on the outer peripheral portion. An iron core for electrical equipment made by winding a thin silicon steel strip. 2. A low magnetostrictive silicon steel strip at the inner peripheral portion having a thickness of 0.
The iron core of an electric device according to claim 1, wherein a 1 mm, 6.5% silicon steel strip is used, and the low-magnetostriction silicon steel strip at the outer peripheral portion is a 0.3 mm, 6.5% silicon steel strip.