Title:
DUST CORE AND ITS MANUFACTURING METHOD
Document Type and Number:
WIPO Patent Application WO/2006/006545
Kind Code:
A1
Abstract:
A dust core formed by press-forming a magnetic core powder produced by coating magnetic powder containing Fe as a main component with an insulating film. The dust core is characterized in that the magnetic powder contains 1.5 mass% or less of Si, the volume average particle size is 80 to 300 μm, the density ratio is 96% or more, and the dust core is used in an alternating magnetic field of a frequency of 100 to 2,000 Hz. The dust core exhibits a low iron loss and high magnetic flux density equivalent or superior to those of conventionally used magnetic steel sheets when the dust core is used at such a frequency.
Inventors:
SUGIYAMA MASAKI (JP)
YAMAGUCHI TOSHIYA (JP)
KISHIMOTO HIDEFUMI (JP)
TAJIMA SHIN (JP)
HATTORI TAKESHI (JP)
ZHANG GUOFENG (JP)
YAMAGUCHI TOSHIYA (JP)
KISHIMOTO HIDEFUMI (JP)
TAJIMA SHIN (JP)
HATTORI TAKESHI (JP)
ZHANG GUOFENG (JP)
Application Number:
PCT/JP2005/012717
Publication Date:
January 19, 2006
Filing Date:
July 04, 2005
Export Citation:
Assignee:
TOYOTA MOTOR CO LTD (JP)
FINESINTER CO LTD (JP)
SUGIYAMA MASAKI (JP)
YAMAGUCHI TOSHIYA (JP)
KISHIMOTO HIDEFUMI (JP)
TAJIMA SHIN (JP)
HATTORI TAKESHI (JP)
ZHANG GUOFENG (JP)
FINESINTER CO LTD (JP)
SUGIYAMA MASAKI (JP)
YAMAGUCHI TOSHIYA (JP)
KISHIMOTO HIDEFUMI (JP)
TAJIMA SHIN (JP)
HATTORI TAKESHI (JP)
ZHANG GUOFENG (JP)
International Classes:
H01F27/255; H01F1/20; H01F41/02; H02K1/02; (IPC1-7): H01F27/255; H01F1/20; H01F41/02; H02K1/02
Foreign References:
| JPS61154111A | 1986-07-12 | |||
| JPH06275452A | 1994-09-30 | |||
| JP2003297624A | 2003-10-17 | |||
| JP2003282316A | 2003-10-03 | |||
| JP2003142310A | 2003-05-16 | |||
| JP2003303711A | 2003-10-24 |
Attorney, Agent or Firm:
Ohkawa, Hiroshi (Nakamura-ku, Nagoya-sh, Aichi, JP)
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