公开(公告)号：EP1211699B1

公开(公告)日：2004-02-04

申请号：EP01128189.6

申请日：2001-11-27

申请人： NEC TOKIN Corporation

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

IPC分类号： H01F3/14

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

公开(公告)号：EP1209703B1

公开(公告)日：2009-08-19

申请号：EP01128190.4

申请日：2001-11-27

申请人： Nec Tokin Corporation

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

IPC分类号： H01F3/14

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

公开(公告)号：EP1202295A3

公开(公告)日：2003-10-15

申请号：EP01125566.8

申请日：2001-10-25

申请人： NEC TOKIN Corporation

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

IPC分类号： H01F3/14

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/m 3 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.

公开(公告)号：EP1209703A3

公开(公告)日：2003-10-15

申请号：EP01128190.4

申请日：2001-11-27

申请人： NEC TOKIN Corporation

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

IPC分类号： H01F3/14

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

摘要： Disposed in a magnetic gap of a magnetic core, a magnetically biasing permanent magnet is a bond magnet comprising rare-earth magnetic powder and a binder resin. The rare-earth magnetic powder has an intrinsic coercive force of 5kOe or more, a Curie temperature of 300°C or more, and an average particle size of 2.0-50µm. The rare-earth magnetic power has a surface coated with a metallic layer containing an oxidation-resistant metal. In order to enable a surface-mount to reflow, the rare-earth magnetic powder may have the intrinsic coercive force of 10kOe or more, the Curie temperature of 500°C and the average particle size of 2.5-50µm. In addition, to prevent specific resistance from degrading, the metallic layer desirably may be coated with a glass layer consisting of low-melting glass having a softening point less than a melting point of the oxidation-resistant metal.

公开(公告)号：EP1341191A1

公开(公告)日：2003-09-03

申请号：EP02004532.4

申请日：2002-02-27

申请人： NEC TOKIN Corporation

发明人： Fujiwara, Teruhiko ,  Ishii, Masayoshi ,  Saito, Yoshitaka

IPC分类号： H01F1/26 ,  H01F1/147 ,  H01F41/02

CPC分类号： H01F41/0246 ,  H01F1/14766 ,  H01F1/26

摘要： Preparation is made of alloy powder comprising 3.0-8.0 wt% Si, 0.1-1.0 wt% O, 0-2.0 wt% (0 being exclusive) of at least one element selected from Mn, Al, V, Cr, and Ti, and balance Fe and having a particle size substantially equal to 150 µm or less. A binder is mixed with the alloy powder to form a mixture. The mixture is compaction-formed by the use of a die. Thus, a powder core is obtained which has a 20 kHz a.c. permeability equal to 20 or more under an applied d.c. magnetic field of 12000 A/m, a core loss characteristic of 1000 kW/m 3 under the conditions of 20 kHz and 0.1 T, saturation magnetization of 10000 G or more, and coercive force of 3.0 Oe or less.

摘要翻译： 制备由包含3.0-8.0重量％Si，0.1-1.0重量％O，0-2.0重量％（0独特）至少一种选自Mn，Al，V，Cr和Ti的元素的合金粉末制成，以及 平衡Fe，其粒径基本上等于150μm或更小。 将粘合剂与合金粉末混合以形成混合物。 混合物通过使用模具进行压实成型。 因此，获得了具有20kHz交流电流的粉末芯。 渗透率等于20或更高。 在20kHz和0.1T，饱和磁化强度为10000G以上，矫顽力为3.0Oe以下的条件下，12000A / m的磁场，铁心损耗特性为1000kW / m 3。