REACTOR AND METHOD FOR PRODUCING SAME

Title:

REACTOR AND METHOD FOR PRODUCING SAME

Document Type and Number:

WIPO Patent Application WO/2011/077694

Kind Code:

A1

Abstract:

Provided are a reactor having excellent direct current superposition characteristics wherein the L value (inductance) is not drastically reduced in a high magnetic field, and a method for producing the reactor. In a first mixing process, a soft magnetic powder mainly composed of iron, and 0.4-1.5 wt% of an inorganic insulation powder relative to the soft magnetic powder are mixed by a mixer. The mixture obtained through the first mixing process is heat-treated under a non-oxidizing atmosphere at not less than 1,000°C and not more than a temperature at which sintering of the soft magnetic powder starts. In a granulation process, 0.1-0.5 wt% of a silane coupling agent is added to form an adhesion reinforcing layer as a first layer; 0.5-2.0 wt% of a silicon resin is added to a soft magnetic alloy powder in which an adhesion reinforcing layer is formed as a second layer by the silane coupling agent, to form a bonding layer; and, after that, a lubricant resin is mixed, and a pressure-molding operation is performed to form a compact. In an annealing process, a reactor is formed using a powder magnetic core produced by annealing the compact under the non-oxidizing atmosphere.

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Inventors:

OSHIMA YASUO (JP)
HANDA SUSUMU (JP)
AKAIWA KOTA (JP)
TAMURA YASUHARU (JP)

Application Number:

PCT/JP2010/007369

Publication Date:

June 30, 2011

Filing Date:

December 20, 2010

Export Citation:

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Assignee:

TAMURA SEISAKUSHO KK (JP)
OSHIMA YASUO (JP)
HANDA SUSUMU (JP)
AKAIWA KOTA (JP)
TAMURA YASUHARU (JP)

International Classes:

H01F37/00; H01F1/26; H01F1/33; H01F27/24; H01F27/255; H01F41/02

Foreign References:

JP2003217919A	2003-07-31
JP2007214366A	2007-08-23
JP2008112935A	2008-05-15
JP2003332116A	2003-11-21
JP2009302165A	2009-12-24
JP2005217289A	2005-08-11
JP2005336513A	2005-12-08
JP2002033211A	2002-01-31
JP2010245459A	2010-10-28
JP2010251474A	2010-11-04
JP2004095935A	2004-03-25
JP2007012866A	2007-01-18
JP2009224584A	2009-10-01
JP2006344867A	2006-12-21
JP2006344868A	2006-12-21

Other References: