Magnetic core and application article using it

A technology of magnetic cores and products, applied in the direction of magnetic cores/yokes, transformer/inductor magnetic cores, magnetic materials, etc., can solve the problems of low magnetostriction, unrealized, larger magnetic cores, etc.

Active Publication Date: 2008-04-02
HITACHI METALS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the FeSiB-based amorphous alloy strip has a problem in that since the FeSiB-based amorphous alloy strip has a B lower than that of the silicon stee...

Method used

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  • Magnetic core and application article using it
  • Magnetic core and application article using it
  • Magnetic core and application article using it

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Amorphous alloy strips with a thickness of 23 to 25 μm and a width of 5 mm were prepared by the following steps: Prepare 200 g of composition Fe 82 Si 2 B 13.9 C 2 mn 0.1 the master alloy; the master alloy was heated to 1300° C. with high-frequency power to melt it and prepare a molten alloy; and, the molten alloy was sprayed onto a Cu—Be alloy roll rotating at 25 to 30 m / s. will be used to blow CO 2 The nozzle of the gas is installed at a position 10 cm away from the exhaust nozzle of the Cu roller in the rear direction, so that the gas used for blowing CO 2 The gas jets formed an angle of 45 degrees with respect to the surface of the roll. In regulating CO 2 The blowing pressure of the gas, and while controlling the gas pressure near the roll at the exhaust nozzle to 0 (unblown gas), 0.1 and 0.3 MPa, the amorphous alloy was cast. Then, it was found that the oxygen concentrations in the vicinity of the exhaust nozzle (within 3 cm from the position where the molt...

Embodiment 2

[0040] 200 g of master alloys with the composition shown in Table 3 were prepared, and then by steps similar to those in Example 1, an amorphous alloy strip with a width of 5 mm was prepared and the inner diameter / outer diameter was measured to be 25 / 35 mm properties of the toroidal core. Properties are shown in Table 3. By using GD-OES (Glow Discharge Optical Emission Spectrometer) manufactured by Horiba, Ltd., elements were quantitatively analyzed to measure the position of the carbon segregation layer from the rolling surface in the depth direction. As a result, a portion having a higher carbon concentration than the uniform concentration in the inside is regarded as a carbon segregation layer, and the position where the concentration is highest and the concentration value are read as the position of the carbon segregation layer and the value of the carbon peak. It is understood that the noise level is related to B 80 Highly correlated, can be increased by increasing B s...

Embodiment 2-2

[0044] Amorphous alloy ribbons having the compositions shown in Table 4 were prepared in a similar manner to the case of Example 1, and properties of toroidal cores with inner / outer diameters of 25 / 35 mm were measured. Properties are shown in Table 4. The addition of 4% carbon increases the iron loss of the amorphous alloy strip due to the increase in coercive force, and may cause problems in the manufacturing step due to the brittleness of the amorphous alloy strip. The addition of 0.7 atomic % of Mn makes B s decrease, decrease in squareness, increase in coercive force, and increase in iron loss. Large additions of both carbon and Mn also increase the noise level.

[0045] [Table 4]

[0046] sample

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Abstract

A magnetic core making use of an Fe-based amorphous alloy ribbon that simultaneously attains miniaturization and noise reduction through realization of high BS; and an applied product making use of the same. There is provided a magnetic core making use of an Fe-based amorphous alloy ribbon, wherein the saturated magnetic flux density (BS) of the Fe-based amorphous alloy ribbon is = 1.60 T and wherein the ratio between magnetic flux density at a core external magnetic field of 80 A/m (B80) and BS of the Fe-based amorphous alloy ribbon, B80/BS, is = 0.90.

Description

technical field [0001] The present invention relates to a magnetic core using Fe-based amorphous alloy ribbon mainly for noise reduction, and can be used for applied products such as motors, transformers, choke coils, generators or sensors. Background technique [0002] As magnetic core materials for transformers, motors, choke coils, sensors, etc., Fe-based amorphous alloy ribbons have attracted attention due to their excellent soft magnetic properties, especially low iron loss in them. It has been used in virtually all kinds of cores, components and devices. Among Fe-based amorphous alloy ribbons, especially FeSiB-based amorphous alloy ribbon has been widely used because it shows a relatively high saturation magnetic flux density B s and excellent thermal stability. However, the FeSiB-based amorphous alloy strip has a problem in that since the FeSiB-based amorphous alloy strip has a B lower than that of the silicon steel sheet s , so the core becomes larger; and the cor...

Claims

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Application Information

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IPC IPC(8): H01F1/153C22C45/02H01F1/14H01F3/04H01F27/24H01F41/02
Inventor 小川雄一直江昌武吉泽克仁
Owner HITACHI METALS LTD
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