Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Composite magnetic body and method for producing the same

A technology of composite magnetic body and metal magnetic powder, which can be used in magnetic objects, inductance/transformer/magnet manufacturing, magnetic materials, etc., and can solve the problems of insufficient use of transformers and choke coils.

Inactive Publication Date: 2012-05-23
PANASONIC CORP
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, in the above-mentioned prior art, although the temperature characteristic of the core loss is improved, it is not sufficient especially when used as a transformer, a choke coil, etc. for a power supply with a large output power, so further reduction is required. core loss

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Composite magnetic body and method for producing the same
  • Composite magnetic body and method for producing the same
  • Composite magnetic body and method for producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] prepared with an average particle size of 15 μm Figure 1A ~ Figure 1C The metal magnetic powder of the composition described in. After adding 1.0 parts by weight of silicone resin as an insulating binder to 100 parts by weight of the prepared metal magnetic powder, and adding 1.0 parts by weight of butyral resin as a bonding aid, add a small amount of toluene to mix and disperse , thus making a mixture. For the resulting mixture at 12ton / cm 2 The pressure was press-molded, and heat-treated at 820°C for 60 minutes in a nitrogen atmosphere with a purity of 5N to prepare a sample. In addition, the produced sample is a toroidal core having an outer diameter of 14 mm, an inner diameter of 10 mm, and a height of about 2 mm. figure 2 It is a perspective view of the molded body of the composite magnetic body in embodiment. The shape of the molded body is not limited to a ring shape, and there are shapes with magnetic cores of various shapes. Figure 1A ~ Figure 1C The co...

Embodiment 2

[0053] A metal magnetic powder having an average particle diameter of 30 μm and having a composition of 6.7% by weight of Al, 8.4% by weight of Si, and the remainder of Fe was prepared. After adding 0.9 parts by weight of silicone resin as an insulating binder to 100 parts by weight of the prepared metal magnetic powder, and adding 1.0 parts by weight of butyral resin as a bonding aid, add a small amount of toluene to mix and disperse , thus making a mixture. For the resulting mixture, use 5 to 15 ton / cm 2 The pressure is press-molded, and heat-treated in the range of 500-820°C for 30-60 minutes in a nitrogen atmosphere with a purity of 6N, and impregnated in epoxy resin. Figure 4 The retention force of the prepared samples is shown. In addition, the shape of the produced sample is a toroidal core having an outer diameter of 14 mm, an inner diameter of 10 mm, and a height of about 2 mm.

[0054] Magnetic permeability and core loss were evaluated for the obtained samples. ...

Embodiment 3

[0057] Prepared with a composition of 8.0% by weight Al, 8.2% by weight Si, and the rest Fe Figure 5 The metal magnetic powder with the average particle size. After adding 1.0 parts by weight of silicone resin as an insulating binder to 100 parts by weight of the prepared metal magnetic powder, and adding 1.0 parts by weight of butyral resin as a bonding aid, add a small amount of toluene to mix and disperse , thus making a mixture. For the resulting mixture at 10 ton / cm 2 After degreasing by heating at 350°C in the air for 3 hours, heat treatment was performed at 780°C for 30 minutes in a nitrogen atmosphere with a purity of 5N. In addition, the produced sample is a toroidal core having an outer diameter of 14 mm, an inner diameter of 10 mm, and a height of about 2 mm.

[0058] Magnetic permeability and core loss were evaluated for the obtained samples. The magnetic permeability is measured with an LCR measuring instrument at a frequency of 120KHz. In addition, the core ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
thicknessaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

A composite magnetic body is obtained by mixing Fe-Al-Si metal magnetic powders composed of 5.7 wt%=Al=8.5 wt%, 6.0 wt%=Si=9.5 wt%, and reminder Fe and an insulating binder, pressure-molding the mixed powders, and heat-treating the molding at a temperature of 600 DEG C or more and 900 DEG C or less. The sign of a crystal magnetic anisotropic constant of a metal magnetic powder in the composite magnetic body is negative at room temperature, and the sign of a magnetostriction constant is positive at room temperature. The temperature coefficient of a core loss at room temperature is negative. The composite magnetic body improves the temperature property of core loss, and has an excellent soft magnetic property with low loss and high magnetic permeability.

Description

technical field [0001] The present invention relates to a composite magnetic body used in inductors, choke coils, transformers, etc. of electronic equipment and a method of manufacturing the same. Background technique [0002] With the miniaturization of electric / electronic equipment in recent years, magnetic bodies are also required to be small in size and high in efficiency. As conventional magnetic materials, there are, for example, ferrite cores using ferrite powder for choke coils used in high-frequency circuits, and dust cores that are compacts of metal magnetic powder. [0003] Among them, the saturation magnetic flux density of the ferrite core is small, and the DC superposition characteristic is poor. Therefore, in the conventional ferrite core, in order to ensure DC superposition characteristics, a gap of several hundred μm is provided in a direction perpendicular to the magnetic circuit, thereby preventing a drop in inductance value during DC superposition. Howe...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/24B22F1/00B22F3/00B22F3/24C22C38/00H01F1/147B22F1/102
CPCB22F3/10C22C38/06H01F1/14791C22C38/02B22F1/0062B22F2998/00C22C2202/02H01F41/0246C22C33/0278B22F1/102B22F3/26B22F3/1021
Inventor 高桥岳史松谷伸哉
Owner PANASONIC CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com