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

Unit block used in manufacturing core with soft magnetic metal powder, and method for manufacturing core with high current DC bias characteristics using the unit block

A technology of metal powder and unit block, applied in the direction of magnetic core/yoke, inductor/transformer/magnet manufacturing, circuit, etc.

Inactive Publication Date: 2006-11-29
CHANG SUNG CO LTD
View PDF1 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, high current DC bias characteristics are slightly worse than FeNiMo cores or high flux cores

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
  • Unit block used in manufacturing core with soft magnetic metal powder, and method for manufacturing core with high current DC bias characteristics using the unit block
  • Unit block used in manufacturing core with soft magnetic metal powder, and method for manufacturing core with high current DC bias characteristics using the unit block
  • Unit block used in manufacturing core with soft magnetic metal powder, and method for manufacturing core with high current DC bias characteristics using the unit block

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] The preparation of the soft magnetic metal powder of the present invention will be described below.

[0031] The sendust powder used in the present invention was prepared according to the same method of Korean Patent Application No. 1998-62927 done by the applicant of the present invention, and the preparation of the powder is briefly described below.

[0032]Use a jaw crusher, a rotary crusher or a hammer mill to crush the sendust aluminum alloy ingot, which has high magnetic permeability and low loss properties, and is composed of 9.6% Si, 5.4 % of aluminum and the rest of Fe; treated with a ball mill for 1 hour, heat treated at 800°C to 900°C for 8 hours in a mixed gas atmosphere of hydrogen and nitrogen. The sendust powder is prepared by treating the heat-treated powder by wet insulating coating using 1.0 wt% to 2.0 wt% insulating ceramic or by dry insulating coating using a low melting point ceramic binder.

[0033] The preparation of high-throughput powder consis...

Embodiment 1

[0046] A sendust ingot having high magnetic permeability and low loss characteristics and composed of 9.6% by weight of Si, Composition of 5.4% by weight of Al and the balance of Fe. Preparation of sendust powder is accomplished by treating sendust powder by wet insulating coating using 1.0% by weight of mixed ceramics or by dry insulating coating using glass frit (Korean Patent Application No. 1998 -62927).

[0047] After adding a lubricant to the coated sendust powder, the obtained powder is pressed into a unit block with a length of 60 mm, a width of 30 mm and a height of 20 mm with a high pressing pressure of 100 tons to 500 tons, and then heated at 700 ° C Heat treatment at ~800° C. for 1 hour in a nitrogen atmosphere, so as to complete the manufacture of the unit block for the magnetic core.

Embodiment 2

[0049] Preparation of FeNiMo powder (Korean Patent Application No. 1997-0009412) was accomplished by treating the powder (FeNiMo) by wet insulating coating with 1.0% by weight of mixed ceramics, the powder (FeNiMo) Molybdenum) has a particle size equal to or less than 300 mesh (50 μm), is produced by a spray method, and consists of 2% Mo, 80% Ni and the balance Fe.

[0050] After adding stearic acid as a lubricant to the coated iron-nickel-molybdenum powder, the resulting powder is pressed into a unit block with a length of 60 mm, a width of 30 mm, and a height of 20 mm at a high pressing pressure of 100 tons to 500 tons, Then heat treatment at 700° C.-800° C. for 1 hour in a nitrogen atmosphere, so as to complete the manufacture of the unit block for the magnetic 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
particle size (mesh)aaaaaaaaaa
noiseaaaaaaaaaa
Login to View More

Abstract

A unit block for a core using soft magnetic metal powder, a core having excellent high-current DC bias characteristics using the unit block, and a method of producing the core are disclosed. The unit block is used to produce cores applied to an active filter for PFC, a three-phase line reactor, or an inductor for automotive electronics. A method of producing the core comprises mixing sendust alloy, High Flux, MPP, or silicon steel powders, which have an average particle size of 175 gm or less, with a solid lubricant; compacting a mixture at a pressure of 10 - 18 tons per unit area; heat-treating the compacted mixture at 600 - 800'C for 1 - 2 hours to form the unit blocks each having a length of 3 - 10 cm, a width of 1 - 5 cm, and a height of 1 - 5 cm; and attaching the unit blocks using a heat- and fire-resistant adhesive.

Description

technical field [0001] The present invention relates to a unit block for a magnetic core using soft magnetic metal powder, a magnetic core having excellent high-current direct current (DC) bias characteristics using the unit block, and a method of manufacturing the magnetic core. More particularly, the present invention relates to a unit block for a magnetic core using soft magnetic metal powder, a magnetic core having excellent large-current DC bias characteristics using the unit block, and a method of manufacturing the magnetic core, wherein, The unit block is used to manufacture a magnetic core, which can be applied to active filters for PFC (power factor correction) (inductors for high-current step-down or high-current step-up), three-phase lines Reactors or inductors for automotive electronics using fuel cell systems. Background technique [0002] Used in active filters for PFC (power factor correction) (inductors for high-current step-down or high-current step-up), th...

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): H01F3/04H01F3/08H01F41/02
CPCH01F41/0246H01F3/08Y10T428/12014H01F3/04
Inventor 朴在烈俞奉基李泰京
Owner CHANG SUNG CO LTD
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