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1. 发明专利

JP2005150380A Flexible inductor 审中-公开
标题翻译：柔性电感器
公开(公告)号：JP2005150380A
公开(公告)日：2005-06-09
申请号：JP2003385509
申请日：2003-11-14
申请人： Daido Steel Co Ltd , 大同特殊鋼株式会社
发明人： TAKEMOTO SATOSHI , SAITOU TAKANOBU
IPC分类号： B22F3/00 , H01F1/26 , H01F27/255 , H01F37/00
摘要： PROBLEM TO BE SOLVED: To provide a flexible inductor that is low in initial permeability and reduced in the variation of permeability even under a high magnetic field.
SOLUTION: The flexible inductor is constituted in a molded body composed of soft magnetic powder and rubber and has form deformability. The molded body is obtained by kneading 60-80 vol.% of soft magnetic powder and 20-40 vol.% of rubber.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供初始磁导率低的柔性电感器，即使在高磁场下也可以减小磁导率的变化。解决方案：柔性电感器由软磁粉末和橡胶构成的成型体构成，具有形状变形性。通过捏合60-80体积％的软磁性粉末和20-40体积％的橡胶来获得成型体。版权所有（C）2005，JPO＆NCIPI

2. 发明专利

JP2005079530A Soft magnetic powder and dust core using it 审中-公开
标题翻译：软磁粉和软芯使用它
公开(公告)号：JP2005079530A
公开(公告)日：2005-03-24
申请号：JP2003311664
申请日：2003-09-03
申请人： Daido Steel Co Ltd , 大同特殊鋼株式会社
发明人： TAKEMOTO SATOSHI , SAITOU TAKANOBU
IPC分类号： B22F9/04 , B22F1/00 , B22F9/08 , C22C38/00 , H01F1/147 , H01F1/20 , H01F27/255
摘要： PROBLEM TO BE SOLVED: To provide a dust core having high initial permeability and excellent direct-current superposition characteristics and soft magnetic powder used for it. SOLUTION: Soft magnetic powder has an aspect ratio of 1.2 to 2 and a plurality of acute angle portions formed on the surface. A dust core has magnetic characteristics of μ 0 ≥100 and μ/μ 0 ≥0.8, expressing initial permeability as μ 0 and permeability at the time of magnetic field impression of 1600A/m as μ. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供具有高初始磁导率和优异的直流叠加特性的粉芯，以及用于其的软磁性粉末。解决方案：软磁粉末的纵横比为1.2-2，在表面上形成多个锐角部分。防尘芯具有μ 0 ≥100和μ/μ 0 ≥0.8的磁特性，表示初始磁导率为μ 0 ， 1600A / m的磁场印象时间为μ。版权所有（C）2005，JPO＆NCIPI

3. 发明专利

JP2003059710A Dust core 审中-公开
标题翻译： DUST CORE
公开(公告)号：JP2003059710A
公开(公告)日：2003-02-28
申请号：JP2002166075
申请日：2002-06-06
申请人： Daido Steel Co Ltd , 大同特殊鋼株式会社
发明人： TAKEMOTO SATOSHI , SAITOU TAKANOBU
IPC分类号： B22F1/00 , B22F1/02 , C22C38/00 , C22C45/02 , H01F1/153 , H01F1/24 , H01F3/08
CPC分类号： H01F1/15308
摘要： PROBLEM TO BE SOLVED: To provide a dust core which can be restrained from decreasing in permeability even if a strong magnetic field is applied and has a low core loss and new soft magnetic powder used for manufacturing the same.
SOLUTION: A dust core has a composition represented by a following formula, (Fe
1-f (Co+Ni)
f )
100-e-d-c-b-a M
e M'
d Si
c B
b X
a , (wherein, M is at least an element selected from Hf, Ta, Ti, Zr and Nb, M' is at least an element selected out of Sc, V, Cr, Mn, Mo, Pd, W, Pt, Zn, Sn and rare earth elements, X denotes at least an element selected from Cu, N, O, Al, P, S, Ca, Ga, Ge, As, Li, Be, Mg, Se, Sr, Cd, In, Sb, Te and Ba, and f, e, d, c, b and a are each so set as to satisfy following formulas, 0≤f≤30, 0≤e≤30, 0≤d≤20, 0≤c≤30, 1≤b≤30, and 0≤a≤50).
COPYRIGHT: (C)2003,JPO
摘要翻译：要解决的问题：为了提供即使施加强磁场并且具有低磁芯损耗也可以抑制渗透性降低的粉尘芯和用于制造这种磁芯的新的软磁性粉末。解决方案：防尘芯具有由下式表示的组成：（Fe1-f（Co + Ni）f）100-edcba Me M'd Sic Bb Xa（其中，M是至少一种选自Hf，Ta ，Ti，Zr和Nb中的至少一种元素，M'是选自Sc，V，Cr，Mn，Mo，Pd，W，Pt，Zn，Sn和稀土元素中的至少一种元素，X表示选自Cu ，N，O，Al，P，S，Ca，Ga，Ge，As，Li，Be，Mg，Se，Sr，Cd，In，Sb，Te和Ba以及f，e，d，c，b和 a分别设定为满足下列公式：0 <= f <= 30,0 <= e <= 30,0 <= d <= 20,0 <= c <= 30,1 <= b <= 30 ，0 <= a <= 50）。

4. 发明专利

JP2003037018A Method for manufacturing dust core 审中-公开
标题翻译：制造粉芯的方法
公开(公告)号：JP2003037018A
公开(公告)日：2003-02-07
申请号：JP2001221707
申请日：2001-07-23
申请人： Daido Steel Co Ltd , 大同特殊鋼株式会社
发明人： SAITOU TAKANOBU , TAKEMOTO SATOSHI
IPC分类号： H01F1/22 , H01F1/24 , H01F1/33 , H01F41/02
CPC分类号： H01F1/24
摘要： PROBLEM TO BE SOLVED: To manufacture a dust core in which an electrical resistance value is large and a core loss due to an eddy current is small.
SOLUTION: A manufacturing method contains a step of mixing a metal salt aqueous solution with soft magnetic powder for forming the mixture, to heat the mixture. The metal forms an oxide of electrical insulation.
COPYRIGHT: (C)2003,JPO
摘要翻译：要解决的问题：制造电阻值大且由于涡流引起的磁芯损耗小的防尘芯体。解决方案：制造方法包括将金属盐水溶液与用于形成混合物的软磁性粉末混合以加热混合物的步骤。金属形成电绝缘氧化物。

5. 发明专利

JP2002093612A MAGNETIC ELEMENT AND ITS MANUFACTURING METHOD 失效
公开(公告)号：JP2002093612A
公开(公告)日：2002-03-29
申请号：JP2000281046
申请日：2000-09-18
申请人： DAIDO STEEL CO LTD
发明人： SAITOU TAKANOBU , TAKEMOTO SATOSHI
IPC分类号： H01F1/22 , H01F1/08 , H01F1/147 , H01F41/02
摘要： PROBLEM TO BE SOLVED: To provide a magnetic element which is surely possessed of required temperature characteristics of magnetic properties, and to provide its manufacturing method. SOLUTION: Powder A of Fe-Si-Al alloy containing Si of 9 wt.% or above, Al of 5 wt.% or above, unavoidable impurities, and Fe for residual wt.% and powder B of magnetic metals or magnetic alloys, other than the Fe-Si-Al alloy are mixed together at a prescribed mixing ratio to obtain the mixed powder; and the mixed powder is molded into a required shape for the formation of a magnetic element. A magnetic element manufacturing method comprises a blending (S2) process of blending the powder A and B at a prescribed mixing ratio into a mixed powder, and a molding (S5) process of filling the mixed powder into a molding die and molding the mixed powder into required shape through compression.

6. 发明专利

JP2001358005A ATOMIZED SOFT MAGNETIC POWDER AND DUST CORE USING IT 失效
公开(公告)号：JP2001358005A
公开(公告)日：2001-12-26
申请号：JP2000176207
申请日：2000-06-13
申请人： DAIDO STEEL CO LTD
发明人： TAKEMOTO SATOSHI , SAITOU TAKANOBU
IPC分类号： B22F1/00 , C22C38/00 , H01F1/22 , H01F1/24 , H01F1/26 , H01F41/02
摘要： PROBLEM TO BE SOLVED: To provide atomized soft magnetic powder excellent in molding and to provide a dust core with small core loss and high magnetic permeability which is easily manufactured with it. SOLUTION: Soft magnetic atomizing powder 1 manufactured by an atomizing method is provided whose ratio between major axis L1 and minor axis L2, L1/L2, is 1.3-2.5, with the powder of average particle size 30 μm or less being 40 wt.% or above while that of 5 μm or less being 10 wt.% or less. A particle size D50 is 50 μm or less when the powder is integrated sequentially starting with small size up to 50 wt.% of the entire powder.

7. 发明专利

JP2001068365A DUST CORE WITH GOOD DC SUPERIMPOSING CHARACTERISTICS AND MANUFACTURING METHOD 失效
公开(公告)号：JP2001068365A
公开(公告)日：2001-03-16
申请号：JP24063599
申请日：1999-08-26
申请人： DAIDO STEEL CO LTD
发明人： TAKEMOTO SATOSHI , SAITOU TAKANOBU , YAHAGI SHINICHIRO
IPC分类号： H01F1/22 , H01F1/147 , H01F41/02
摘要： PROBLEM TO BE SOLVED: To provide a dust core made of soft magnetic powder of Fe-9.5 Si-5.5 Al-based alloy (Sendust alloy) with good DC superimposing characteristics, in which magnetic flux is not saturated under condition of large current in a coil and the permeability is not reduced. SOLUTION: Powder of soft magnetic alloy is made flat and an anisotropy characteristic in shape is shown, and an axis hard magnetization is generated vertically to a face of flat grains. The magnetic powder obtained in this way is subjected to pressed powder molding in a state of being oriented in a magnetic field vertically to a provisional magnetic path. Then, a dust core with a high counter magnetic field coefficient in a magnetic path of the magnetic core is obtained. In a choke coil manufactured with the dust core, an increase in magnetic flux against excitation by a DC is reduced and the saturation is prevented, so a rate of decrease in permeability can be improved greatly. As a result, a choke coil with a good DC superimposing characteristic can be obtained.

8. 发明专利

JPH11152504A SOFT MAGNETIC ATOMIZED POWDER AND DUST CORE 失效
公开(公告)号：JPH11152504A
公开(公告)日：1999-06-08
申请号：JP33649597
申请日：1997-11-19
申请人： DAIDO STEEL CO LTD
发明人： SAITOU TAKANOBU , YAHAGI SHINICHIRO
IPC分类号： B22F9/08 , B22F1/00 , H01F1/20
摘要： PROBLEM TO BE SOLVED: To provide a dust core having magnetic properties of high magnetic permeability and low iron loss and also to provide a soft magnetic atomized powder capable of manufacturing of the above dust core and excellent in comactibility. SOLUTION: At the time of two-dimensionally projecting respective grains G of the soft magnetic atomized powder prepared by the atomizing process, the value of the ratio between the length L1 of the grain G in the minor-axis direction and the length L2 in the major-axis direction, L2 /L1 , lines between 1.1 and 2.5 on average. Accordingly, the dust core prepared by using the above soft magnetic atomized powder has magnetic properties of high magnetic permeability and low iron loss. Moreover, respective grains of the soft magnetic atomized powder show irregular shapes to some extent, by which high compactibility is attained.

9. 发明专利

JPH07123573A SNOW MELTING MEMBER FOR TRANSMISSION LINE 失效
公开(公告)号：JPH07123573A
公开(公告)日：1995-05-12
申请号：JP27093793
申请日：1993-10-28
申请人： DAIDO STEEL CO LTD , SUMITOMO ELECTRIC INDUSTRIES
发明人： SAITOU TAKANOBU , YAHAGI SHINICHIRO , MIYAZAKI TAKESHI , NISHIKAWA TAICHIRO , KUZE TAKAYUKI
IPC分类号： H02G7/16
摘要： PURPOSE:To achieve sufficient snow melting effect by surrounding a transmission line with a ring, pipe or spiral member made of s metal or an oxide thereof having specific dimensions and electromagnetic properties. CONSTITUTION:The snow melting member 2 surrounding a transmission line is formed spirally, for example, and made of a metal or an oxide thereof with the dimensions and electromagnetic properties thereof being set to satisfy the following relationships; HXBH>=40000, 0.7

10. 发明专利

JPH06231414A CORE FOR MAGNETIC HEAD AND ITS PRODUCTION 失效
公开(公告)号：JPH06231414A
公开(公告)日：1994-08-19
申请号：JP1719693
申请日：1993-02-04
申请人： DAIDO STEEL CO LTD
发明人： YAHAGI SHINICHIRO , SAITOU TAKANOBU
IPC分类号： C22C38/00 , G11B5/127 , H01F1/147 , H01F10/14 , H01F41/02
摘要： PURPOSE:To enhance corrosion resistance and to prolong the service life of a magnetic head by improving the corrosion resistance of 'Sendust(R)' by the formation of a nitrided layer. CONSTITUTION:A high permeability alloy having a compsn. consisting of 6.0-12.0wt.% Si, 4.0-8.0wt.% Al and the balance essentially Fe as the basic alloy compsn. is formed into a core shape and the surface is nitrided. This nitriding is carried out by forming a hardened layer on the surface of the formed product by heating at 750-1,100 deg.C for 1-10hr in an N, atmosphere or by holding at 750-1,100 deg.C in a gaseous H2 or inert gaseous atmosphere or in vacuum and subsequent heating at 400-600 deg.C for 1-100hr in an NH3 atmosphere. The objective core for a magnetic head is produced.

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