公开(公告)号：US06590485B2

公开(公告)日：2003-07-08

申请号：US09996048

申请日：2001-11-28

申请人： Teruhiko Fujiwara ,  Masayoshi Ishii ,  Haruki Hoshi ,  Keita Isogai ,  Toru Ito ,  Tamiko Ambo

发明人： Teruhiko Fujiwara ,  Masayoshi Ishii ,  Haruki Hoshi ,  Keita Isogai ,  Toru Ito ,  Tamiko Ambo

IPC分类号： H01F118

CPC分类号： H01F3/14 ,  H01F1/0558 ,  H01F3/10 ,  H01F17/04 ,  H01F29/146 ,  H01F2003/103

摘要： A magnetic core having excellent DC superposition characteristics and core-loss characteristics is provided. The magnetic core comprises a magnetically biasing magnet disposed in a magnetic gap thereof to provide a magnetic bias from opposite ends of the magnetic gap to the core. The said magnetically biasing magnet comprises a bond magnet which comprises rare-earth magnetic powder and a binder resin. The rare-earth magnetic powder has an intrinsic coercive force of 5 kOe or more, a Curie temperature Tc of 300° C. or more, specific resistance of 0.1 &OHgr;·cm or more, residual magnetization Br of 1000 to 4000 G and coercive force bHc of a B-H curve of 0.9 kOe or more.

公开(公告)号：US20050116804A1

公开(公告)日：2005-06-02

申请号：US11031230

申请日：2005-01-06

申请人： Teruhiko Fujiwara ,  Masayoshi Ishii ,  Haruki Hoshi ,  Keita Isogai ,  Hatsuo Matsumoto ,  Toru Ito ,  Tamiko Ambo

发明人： Teruhiko Fujiwara ,  Masayoshi Ishii ,  Haruki Hoshi ,  Keita Isogai ,  Hatsuo Matsumoto ,  Toru Ito ,  Tamiko Ambo

IPC分类号： H01F1/055 ,  H01F3/10 ,  H01F3/14 ,  H01F17/04 ,  H01F29/14 ,  H01F1/09

CPC分类号： H01F1/0558 ,  H01F1/0552 ,  H01F3/10 ,  H01F3/14 ,  H01F17/04 ,  H01F29/146 ,  H01F2003/103

摘要： In order to provide an inductance part having excellent DC superposition characteristic and core-loss, a magnetically biasing magnet, which is disposed in a magnetic gap of a magnetic core, is a bond magnet comprising magnetic powder and plastic resin with the content of the resin being 20% or more on the base of volumetric ratio and which has a specific resistance of 0.1 Ω·cm or more. The magnetic powder used is rare-earth magnetic powder having an intrinsic coercive force of 5 kOe or more, Curie point of 300° C. or more, and an average particle size of 2.0-50 μm. A magnetically biasing magnet used in an inductance part that is treated by the reflow soldering method has a resin content of 30% or more and the magnetic powder used therein is Sm—Co magnetic powder having an intrinsic coercive force of 10 kOe or more, Curie point of 500° C. or more, and an average particle size of 2.5-50 μm. A thin magnet having a thickness of 500 μm or less can be realized for a small-sized inductance part.

摘要翻译： 为了提供具有优异的直流叠加特性和磁芯损耗的电感部分，设置在磁芯的磁隙中的磁偏置磁体是包含磁性粉末和树脂含量的塑料树脂的粘结磁体 基于体积比为20％以上，电阻率为0.1Ω·cm以上。 使用的磁性粉末是具有5kOe以上的固有矫顽力的稀土磁性粉末，居里点为300℃以上，平均粒径为2.0〜50μm。 用于通过回流焊接方法处理的电感部分中的磁偏置磁体具有30％以上的树脂含量，其中使用的磁性粉末是具有10kOe以上的固有矫顽力的Sm-Co磁性粉末，居里 500℃以上，平均粒径为2.5〜50μm。 对于小型电感部件，可以实现厚度为500μm以下的薄磁体。

公开(公告)号：US06753751B2

公开(公告)日：2004-06-22

申请号：US09997066

申请日：2001-11-29

申请人： Teruhiko Fujiwara ,  Masayoshi Ishii ,  Haruki Hoshi ,  Keita Isogai ,  Toru Ito ,  Tamiko Ambo

发明人： Teruhiko Fujiwara ,  Masayoshi Ishii ,  Haruki Hoshi ,  Keita Isogai ,  Toru Ito ,  Tamiko Ambo

IPC分类号： H01F2100

CPC分类号： H01F3/10 ,  H01F3/14 ,  H01F17/04 ,  H01F29/146 ,  H01F2003/103

摘要： An inductor component according to the present invention includes a magnetic core including at least one magnetic gap having a gap length of about 50 to 10,000 &mgr;m in a magnetic path, a magnet for magnetic bias arranged in the neighborhood of the magnetic gap in order to supply magnetic bias from both sides of the magnetic gap, and a coil having at least one turn applied to the magnetic core. The aforementioned magnet for magnetic bias is a bonded magnet containing a resin and a magnet powder dispersed in the resin and having a resistivity of 1 &OHgr;·cm or more. The magnet powder includes a rare-earth magnet powder having an intrinsic coercive force of 5 KOe or more, a Curie point of 300° C. or more, the maximum particle diameter of 150 &mgr;m or less, and an average particle diameter of 2.0 to 50 &mgr;m and coated with inorganic glass, and the rare-earth magnet powder is selected from the group consisting of a Sm—Co magnet powder, Nd—Fe—B magnet powder, and Sm—Fe—N magnet powder.

摘要翻译： 根据本发明的电感器部件包括磁芯，该磁芯包括在磁路中具有大约50至10,000μm的间隙长度的至少一个磁隙，用于磁偏置的磁体布置在磁隙附近以供应 从磁隙的两侧的磁偏压，以及施加至磁芯的至少一圈的线圈。 上述用于磁偏置的磁体是包含分散在树脂中并且具有1Ω·cm或更高电阻率的树脂和磁铁粉末的粘结磁体。 磁铁粉末包括固有矫顽力为5KOe以上，居里点为300℃以上，最大粒径为150μm以下，平均粒径为2.0μm以上的稀土类磁体粉末 50毫米，涂有无机玻璃，稀土磁体粉末选自Sm-Co磁铁粉末，Nd-Fe-B磁铁粉末和Sm-Fe-N磁铁粉末。

公开(公告)号：US06717504B2

公开(公告)日：2004-04-06

申请号：US10039893

申请日：2001-10-24

申请人： Teruhiko Fujiwara ,  Masayoshi Ishii ,  Haruki Hoshi ,  Keita Isogai ,  Toru Ito ,  Tamiko Ambo

发明人： Teruhiko Fujiwara ,  Masayoshi Ishii ,  Haruki Hoshi ,  Keita Isogai ,  Toru Ito ,  Tamiko Ambo

IPC分类号： H01F2724

CPC分类号： H01F3/14 ,  H01F3/10 ,  H01F17/04 ,  H01F29/146 ,  H01F2003/103

摘要： A low-profile magnetic core capable of reducing the thickness of an inductor component is provided. The magnetic core includes at least one gap in a magnetic path, and a permanent magnet is inserted in the gap. The magnetic core has an alternating current magnetic permeability at 20 kHz of 45 or more in a magnetic field of 120 Oe under application of direct current, and has a core loss characteristic of 100 kW/m3 or less under the conditions of 20 kHz and the maximum magnetic flux density of 0.1 T. An inductor component is produced by applying at least one turn of coil to the aforementioned magnetic core.

摘要翻译： 提供了能够减小电感器部件厚度的薄型磁芯。 磁芯包括磁路中的至少一个间隙，并且永磁体插入间隙中。 在使用直流电的情况下，磁芯在120Oe的磁场中的20kHz的交流磁导率为45以上，在20kV的条件下的磁芯损耗特性为100kW / m 3以下 kHz，最大磁通密度为0.1T。通过向上述磁芯施加至少一圈线圈来产生电感器部件。

公开(公告)号：US06710693B2

公开(公告)日：2004-03-23

申请号：US10104799

申请日：2002-03-22

申请人： Hatsuo Matsumoto ,  Toru Ito ,  Masahiro Kondo ,  Ryutaro Isoda ,  Toshiya Sato ,  Tadakuni Sato ,  Teruhiko Fujiwara ,  Masayoshi Ishii ,  Haruki Hoshi

发明人： Hatsuo Matsumoto ,  Toru Ito ,  Masahiro Kondo ,  Ryutaro Isoda ,  Toshiya Sato ,  Tadakuni Sato ,  Teruhiko Fujiwara ,  Masayoshi Ishii ,  Haruki Hoshi

IPC分类号： H01F2100

CPC分类号： H01F3/10 ,  H01F3/14 ,  H01F17/045 ,  H01F21/08 ,  H01F41/0266 ,  Y10T29/4902 ,  Y10T29/49075

摘要： An inductor component contains a drum magnetic core made of a magnetic material having a structure including integrated flanges at both ends of a columnar material, a coil wound around the columnar material in the drum magnetic core and placed between the flanges, and a permanent magnet placed in the neighborhood of the drum magnetic core with the coil wound around. This inductor component contains a sleeve core fitted to the outside of the drum magnetic core. The permanent magnet is placed in at least one gap in a closed magnetic circuit formed with the drum magnetic core and the sleeve core in order to apply a direct-current magnetic field in the direction opposite to the direction of a magnetic field generated by a magnetomotive force due to the coil.