CN-122003724-A - Soft magnetic alloy core structure and electronic device comprising same

Abstract

A soft magnetic alloy core structure is provided. According to one embodiment of the invention, the soft magnetic alloy core structure comprises soft magnetic alloy powder, a binder and an insulating material, wherein the particle size distribution D50 of the soft magnetic alloy powder is 14-40 mu m. Thus, the magnetic core has high magnetic permeability and low magnetic core loss, and the effect of complex shape can be achieved.

Inventors

• YIN SHIZHONG

Assignees

• 阿莫绿色技术有限公司

Dates

Publication Date

20260508

Application Date

20240904

Priority Date

20230927

Claims (13)

1. 1. A pressed soft magnetic alloy core structure body comprises soft magnetic alloy powder, a binder and an insulating material, Wherein the particle size distribution D50 of the soft magnetic alloy powder is 14-40 mu m.
2. 2. The magnetically soft alloy core structure according to claim 1, wherein, The ratio of the particle size distribution D50 to the particle size distribution D10 of the soft magnetic alloy powder is 1:0.13-0.9.
3. 3. The magnetically soft alloy core structure according to claim 1, wherein, The ratio of the particle size distribution D50 to the particle size distribution D90 of the soft magnetic alloy powder is 1:1.1-6.1.
4. 4. The magnetically soft alloy core structure according to claim 1, wherein, The particle size distribution D10 of the soft magnetic alloy powder is 5.5-12.5 mu m, and the particle size distribution D90 of the soft magnetic alloy powder is 46-84 mu m.
5. 5. The magnetically soft alloy core structure according to claim 1, wherein, The soft magnetic alloy powder is Fe soft magnetic alloy powder, The Fe-based soft magnetic alloy powder comprises more than one of Fe-Ni-based soft magnetic alloy powder, fe-Si-based soft magnetic alloy powder and Fe-Si-Al-based soft magnetic alloy powder.
6. 6. The magnetically soft alloy core structure according to claim 1, wherein, The insulating material comprises more than one of a metal oxide insulating material and a phosphate insulating material.
7. 7. The magnetically soft alloy core structure according to claim 1, wherein, The insulating material comprises a metal oxide insulating material and a phosphate insulating material, and the weight ratio of the metal oxide insulating material to the phosphate insulating material is 1:0.04-1.45.
8. 8. The magnetically soft alloy core structure according to claim 6, wherein, The metal oxide insulating material comprises more than one of Al 2 O 3 and SiO 2 .
9. 9. The magnetically soft alloy core structure according to claim 8, wherein, The metal oxide insulating material comprises the Al 2 O 3 and the SiO 2 in a weight ratio of 1:0.12-0.85.
10. 10. The magnetically soft alloy core structure according to claim 1, wherein, The binder includes a silicon-based binder.
11. 11. The magnetically soft alloy core structure according to claim 1, wherein, The soft magnetic alloy powder comprises, by weight, 0.3-1.5 parts of the binder and 0.5-3.5 parts of the insulating material relative to 100 parts of the soft magnetic alloy powder.
12. 12. The magnetically soft alloy core structure according to claim 1, wherein, The magnetic permeability is 50 or more, and the core loss (core loss) is 200mW/cm3 or less at a frequency of 50kHz and 0.1Tesla, and 150mW/cm3 or less at a frequency of 100kHz and 0.05 Tesla.
13. 13. An electronic device comprising the soft magnetic alloy core structure according to any one of claims 1 to 12.

Description

Soft magnetic alloy core structure and electronic device comprising same Technical Field The present invention relates to a magnetically soft alloy core structure, and more particularly, to a magnetically soft alloy core structure and an electronic device including the same. Background Soft magnetic materials are widely used as magnetic core materials for various transformers, choke coils, various sensors, saturable reactors, magnetic switches, etc., for power supply and power conversion of power distribution transformers, laser power sources, accelerators, etc., or as shielding members for electromagnetic waves or magnetic fields, in various electric and electronic devices. In such electric and electronic fields, there is a market demand for soft magnetic materials in which miniaturization and weight saving, high performance and efficiency, and low product cost are demanded, and research on soft magnetic materials having high magnetic permeability and low core loss is actively being conducted in order to meet the above market demand. On the other hand, oxide ferrite having a low cost and a high magnetic permeability has been conventionally widely used, but a core made of the oxide ferrite has a tendency to significantly increase core loss (core loss) at high frequencies. Further, in order to solve the above-mentioned problems, a dust core obtained by subjecting soft magnetic powder to an insulation treatment and compression molding has been conventionally developed, which exhibits relatively high magnetic permeability and low core loss, but has a large limitation in realizing a complex-shaped soft magnetic alloy core structure. Therefore, there is a need to develop a magnetically soft alloy core structure that has both high magnetic permeability and low core loss and is capable of achieving complex shapes. Disclosure of Invention Technical problem to be solved by the invention The present invention has been made to solve the above-mentioned problems occurring in the prior art, and an object thereof is to provide a soft magnetic alloy core structure and an electronic device including the same, in which the magnetic core loss is minimized while having a high magnetic permeability by designing the particle size and composition of soft magnetic alloy powder. Further, another object of the present invention is to provide a soft magnetic alloy core structure which has both high magnetic permeability and low magnetic core loss and is capable of realizing a complicated shape, and an electronic device including the same. Means for solving the problems In order to solve the above problems, the present invention provides a press-formed soft magnetic alloy core structure comprising a soft magnetic alloy powder, a binder and an insulating material, wherein the soft magnetic alloy powder has a particle size distribution D50 of 14 to 40 μm. According to an embodiment of the present invention, a ratio of the particle size distribution D50 to the particle size distribution D10 of the soft magnetic alloy powder may be 1:0.13 to 0.9. In addition, the ratio of the particle size distribution D50 to the particle size distribution D90 of the soft magnetic alloy powder may be 1:1.1 to 6.1. In addition, the soft magnetic alloy powder may have a particle size distribution D10 of 5.5 to 12.5 μm and a particle size distribution D90 of 46 to 84 μm. The soft magnetic alloy powder may be an Fe-based soft magnetic alloy powder, and the Fe-based soft magnetic alloy powder may include one or more of an fe—ni-based soft magnetic alloy powder, an Fe-Si-based soft magnetic alloy powder, and an Fe-Si-Al-based soft magnetic alloy powder. The insulating material may include one or more of a metal oxide insulating material and a phosphate insulating material. In addition, the insulating material may include a metal oxide insulating material and a phosphate insulating material in a weight ratio of 1:0.04 to 1.45. The metal oxide insulating material may include one or more of Al 2O3 and SiO 2. In addition, the metal oxide insulating material may include the Al 2O3 and the SiO 2 in a weight ratio of 1:0.12-0.85. In addition, the binder may include a silicon-based binder. Further, the binder may be included in an amount of 0.3 to 1.5 parts by weight and the insulating material may be included in an amount of 0.5 to 3.5 parts by weight with respect to 100 parts by weight of the soft magnetic alloy powder. The magnetic permeability may be 50 or more, and the core loss (core loss) may be 200mW/cm3 or less at a frequency of 50kHz and 0.1Tesla, and 150mW/cm3 or less at a frequency of 100kHz and 0.05 Tesla. Furthermore, the present invention provides an electronic device including the soft magnetic alloy core structure. On the other hand, the terms "particle size distribution D10", "particle size distribution D50" and "particle size distribution D90" used in the present specification mean particle sizes at which the cumulative degrees of accumulation in th