公开(公告)号：US20050162234A1

公开(公告)日：2005-07-28

申请号：US10511308

申请日：2003-09-22

申请人： Osamu Kobayashi ,  Osamu Yamada ,  Yukio Suzuki ,  Kiyoshi Ito ,  Mayuka Shirai

发明人： Osamu Kobayashi ,  Osamu Yamada ,  Yukio Suzuki ,  Kiyoshi Ito ,  Mayuka Shirai

IPC分类号： C04B35/26 ,  H01F1/34 ,  H01F17/06 ,  H03H1/00 ,  H03B1/00

CPC分类号： C04B35/2625 ,  C04B35/265 ,  C04B35/2658 ,  C04B35/6262 ,  C04B2235/3232 ,  C04B2235/3262 ,  C04B2235/3267 ,  C04B2235/3279 ,  C04B2235/3281 ,  C04B2235/3284 ,  C04B2235/3293 ,  C04B2235/5436 ,  C04B2235/96 ,  H01F1/344 ,  H01F17/06 ,  H01F2017/065

摘要： A signal discriminator is provided which leverages variation of permittivity of Mn—Zn-based ferrite. The signal discriminator comprises a soft magnetic material which has a capacitive reactance C, and which has its complex relative permittivity varying with frequency such that the real part ε′ of the complex relative permittivity is large in a low frequency domain and small in a high frequency domain. In the reactance component X2, the capacitive reactance C is not negligible with respect to the inductive reactance L in a low frequency domain, in consequence of which the value of the reactance component X2 as a parallel circuit of the capacitive reactance C and the inductive reactance L is caused to decrease, and the influence of the capacitive reactance C is decreased in a high frequency domain. Consequently, the reactance component X2 decreases more than the reactance component X1 of a conventional soft magnetic material, and the X-R cross-point frequency moves to a frequency lower than a conventional X-R cross-point frequency XR1, whereby noises in a frequency band where noise components exist are converted into thermal energy thus reducing the waveform distortion originating from high frequency noises.

摘要翻译： 提供了一种利用Mn-Zn基铁素体的介电常数变化的信号鉴别器。 信号鉴别器包括具有电容电抗C的软磁材料，其复相对电容率随频率而变化，使得复相对介电常数的实部ε在低频域中较大，而在高频下小 域。 在电抗分量X 2中，电容电抗C相对于低频域中的感抗L是不可忽略的，结果是电容电抗C和电容电抗C的并联电路的电抗分量X 2的值 导致电感L降低，并且电容电抗C的影响在高频域中降低。 因此，电抗分量X 2比常规软磁材料的电抗分量X 1降低，并且XR交叉点频率移动到低于常规XR交叉点频率XR 1的频率，从而频率上的噪声 噪声分量存在的频带被转换成热能，从而减少由高频噪声引起的波形失真。

公开(公告)号：US07148767B2

公开(公告)日：2006-12-12

申请号：US10515494

申请日：2003-09-22

申请人： Osamu Kobayashi ,  Osamu Yamada ,  Yukio Suzuki ,  Kiyoshi Ito ,  Mayuka Shirai

发明人： Osamu Kobayashi ,  Osamu Yamada ,  Yukio Suzuki ,  Kiyoshi Ito ,  Mayuka Shirai

IPC分类号： H03H7/00 ,  H01F27/24 ,  C04B35/26

CPC分类号： H01F17/06 ,  H01F1/344 ,  H01F3/08 ,  H01F2017/065 ,  H01F2017/067 ,  H03H2001/0092

摘要： A bead type noise filter according to the present invention is constituted by a magnetic core 1 formed of Mn—Zn ferrite having its resistivity increased so as to improve a high frequency characteristic, and having its permittivity lowered, and thereby can successfully suppress radiation noises without distorting the waveform of transmission signals. The magnetic core 1 constituting the bead type noise filter is formed of a high resistivity soft magnetic material, is shaped cylindrical, and has at least one through-hole 1a so as to form a closed magnetic path, and the bead type noise filter is attached on a signal line 2 such that the signal line 2 is inserted through the through-hole 1a. The soft magnetic material has a real part of complex relative permittivity ranging from 1,000 up to 20,000 at 1 kHz and 50 or lower at 1 MHz, and has a resistivity of 150 Ωm or higher.

摘要翻译： 根据本发明的珠型噪声滤波器由其电阻率增加的Mn-Zn铁氧体形成的磁芯1构成，以提高高频特性，并且其介电常数降低，从而可以成功地抑制放射线噪声而没有 扭曲传输信号的波形。 构成胎圈型噪声滤波器的磁芯1由高电阻率软磁性材料形成，成形为圆柱形，并且具有至少一个通孔1a以形成闭合磁路，并且胎圈型噪声滤波器为 附着在信号线2上，使得信号线2穿过通孔1a插入。 该软磁性材料具有在1kHz下为1,000至20,000的复相对介电常数的实部，1MHz为50或更低，并且具有150Ωm或更高的电阻率。

公开(公告)号：US20060055487A1

公开(公告)日：2006-03-16

申请号：US10515494

申请日：2003-09-22

申请人： Osamu Kobayashi ,  Osamu Yamada ,  Yukio Suzuki ,  Kiyoshi Ito ,  Mayuka Shirai

发明人： Osamu Kobayashi ,  Osamu Yamada ,  Yukio Suzuki ,  Kiyoshi Ito ,  Mayuka Shirai

IPC分类号： H03H7/01

CPC分类号： H01F17/06 ,  H01F1/344 ,  H01F3/08 ,  H01F2017/065 ,  H01F2017/067 ,  H03H2001/0092

摘要： A bead type noise filter according to the present invention is constituted by a magnetic core 1 formed of Mn—Zn ferrite having its resistivity increased so as to improve a high frequency characteristic, and having its permittivity lowered, and thereby can successfully suppress radiation noises without distorting the waveform of transmission signals. The magnetic core 1 constituting the bead type noise filter is formed of a high resistivity soft magnetic material, is shaped cylindrical, and has at least one through-hole 1a so as to form a closed magnetic path, and the bead type noise filter is attached on a signal line 2 such that the signal line 2 is inserted through the through-hole 1a. The soft magnetic material has a real part of complex relative permittivity ranging from 1,000 up to 20,000 at 1 kHz and 50 or lower at 1 MHz, and has a resistivity of 150 Ωm or higher.

摘要翻译： 根据本发明的珠型噪声滤波器由其电阻率增加的Mn-Zn铁氧体形成的磁芯1构成，以提高高频特性，并且其介电常数降低，从而可以成功地抑制放射线噪声而没有 扭曲传输信号的波形。 构成胎圈型噪声滤波器的磁芯1由高电阻率软磁性材料形成，成形为圆柱形，并且具有至少一个通孔1a以形成闭合磁路，并且胎圈型噪声滤波器为 附着在信号线2上，使得信号线2穿过通孔1a插入。 该软磁性材料具有在1kHz下为1,000至20,000的复相对介电常数的实部，1MHz为50或更低，并且具有150Ωm或更高的电阻率。

公开(公告)号：US06798329B2

公开(公告)日：2004-09-28

申请号：US10420881

申请日：2003-04-23

申请人： Osamu Kobayashi ,  Osamu Yamada ,  Yukio Suzuki ,  Kiyoshi Ito ,  Mayuka Shirai

发明人： Osamu Kobayashi ,  Osamu Yamada ,  Yukio Suzuki ,  Kiyoshi Ito ,  Mayuka Shirai

IPC分类号： H01F2724

CPC分类号： H01F17/04 ,  H01F1/344

摘要： In an inductor comprising an open magnetic path formed by a soft magnetic material and a winding provided around the open magnetic path, the soft magnetic material has its relative complex dielectric constant varying according to a frequency. In the soft magnetic material, the imaginary part of the relative complex dielectric constant is greater than the real part thereof in a high-frequency band equal higher than the frequency of the electric signal flowing in the winding. Specifically, the soft magnetic material has a resistivity of 150 &OHgr;m, has a real part of the relative complex dielectric constant, ranging from 1,000 to 20,000 at 1 kHz and 50 or less at 1 MHz, and the imaginary part is greater than the real part at 1 MHz.

摘要翻译： 在包括由软磁材料形成的开放磁路和围绕开放磁路设置的绕组的电感器中，软磁材料具有根据频率而变化的其相对复合介电常数。 在软磁性材料中，相对复合介电常数的虚部比在绕组中流动的电信号的频率高的高频带大于其实部。 具体地说，软磁材料的电阻率为150欧姆，具有相对复介电常数的实部，1kHz为1,000〜20,000，1MHz为50以下，虚部大于实部 在1MHz。

公开(公告)号：US06576169B2

公开(公告)日：2003-06-10

申请号：US09989496

申请日：2001-11-21

申请人： Osamu Kobayashi ,  Osamu Yamada ,  Kiyoshi Ito

发明人： Osamu Kobayashi ,  Osamu Yamada ,  Kiyoshi Ito

IPC分类号： B29B1700

CPC分类号： C01G49/009 ,  C01G49/0072 ,  C01P2004/61 ,  C04B35/2658

摘要： A production process of a Mn—Zn ferrite enables wastes of sintered cores to be recycled without serious difficulties in sintering. The production process includes recycling a powder obtained by milling a sintered Mn—Zn ferrite, thereby obtaining a sintered core having a component composition including 44.0 to 49.8 mol % Fe2O3, 4.0 to 26.5 mol % ZnO, 0.02 to 1.00 mol % Mn2O3 and a remainder MnO.

摘要翻译： Mn-Zn铁氧体的制造方法能够使烧结芯的废料再循环，而不会造成烧结的严重困难。 制造方法包括将通过研磨Mn-Zn系铁氧体烧结得到的粉末进行再循环，得到具有44.0〜49.8摩尔％Fe 2 O 3，4.0〜26.5摩尔％ZnO，0.02〜1.00摩尔％Mn 2 O 3的组分组成的烧结芯，其余部分 MnO。

公开(公告)号：US06984338B2

公开(公告)日：2006-01-10

申请号：US10765057

申请日：2004-01-28

申请人： Osamu Kobayashi ,  Osamu Yamada ,  Kiyoshi Ito

发明人： Osamu Kobayashi ,  Osamu Yamada ,  Kiyoshi Ito

IPC分类号： H01F1/34 ,  C04B35/38

CPC分类号： H01F1/344 ,  C04B35/2658 ,  C04B2235/3208 ,  C04B2235/3239 ,  C04B2235/3244 ,  C04B2235/3251 ,  C04B2235/3256 ,  C04B2235/3262 ,  C04B2235/3281 ,  C04B2235/3284 ,  C04B2235/3418 ,  C04B2235/6584 ,  C04B2235/79 ,  C04B2235/83 ,  C04B2235/94 ,  C04B2235/96

摘要： An Mn—Zn ferrite includes base components of 44.0 to 49.8 mol % Fe2O3, 4.0 to 26.5 mol % ZnO, 0.8 mol % or less Mn2O3, and the remainder consisting of MnO, and contains 0.20 (0.20 excluded) to 1.00 mass % CaO as additive. Since the Mn—Zn ferrite contains less than 50.0 mol % Fe2O3 and a limited amount (0.8 mol % or less) of Mn2O3, an abnormal grain growth does not occur even if CaO content is more than 0.20 mass %, and a high electrical resistance can be gained thereby realizing an excellent soft magnetism in a high frequency band such as 1 MHz.

摘要翻译： Mn-Zn铁氧体包括44.0至49.8mol％的Fe 2 O 3 3，4.0至26.5mol％的ZnO，0.8mol％或更少的Mn 2的基础组分 其余为MnO，余量由0.20（0.20）除外）添加至1.00质量％的CaO作为添加剂。 由于Mn-Zn铁氧体含有少于50.0摩尔％的Fe 2 O 3 O 3和Mn 2 O 3的有限量（0.8摩尔％以下） > O 3时，即使CaO含量大于0.20质量％，也不会发生异常的晶粒生长，并且可以获得高的电阻，从而在高频带中实现优异的软磁性，例如 1 MHz。

公开(公告)号：US06984337B2

公开(公告)日：2006-01-10

申请号：US10765050

申请日：2004-01-28

申请人： Osamu Kobayashi ,  Osamu Yamada ,  Kiyoshi Ito

发明人： Osamu Kobayashi ,  Osamu Yamada ,  Kiyoshi Ito

IPC分类号： C04B35/38 ,  H01F1/34

CPC分类号： C04B35/2658 ,  C04B35/63 ,  C04B2235/3208 ,  C04B2235/3232 ,  C04B2235/3239 ,  C04B2235/3244 ,  C04B2235/3251 ,  C04B2235/3256 ,  C04B2235/3262 ,  C04B2235/3281 ,  C04B2235/3284 ,  C04B2235/3293 ,  C04B2235/3418 ,  C04B2235/604 ,  C04B2235/6584 ,  C04B2235/83 ,  C04B2235/94 ,  C04B2235/96 ,  H01F1/344

摘要： An Mn—Zn ferrite includes base components of 44.0 to 49.8 mol % Fe2O3, 4.0 to 26.5 mol % ZnO, at least one of 0.1 to 4.0 mol % TiO2 and SnO2, 0.5 mol % or less Mn2O3, and the remainder consisting of MnO, and contains 0.20 (0.20 excluded) to 1.00 mass % CaO as additive. Since the Mn—Zn ferrite contains less than 50 mol % Fe2O3 and a limited amount (0.5 mol % or less) of Mn2O3, an abnormal grain growth does not occur even if CaO content is more than 0.20 mass %, and a high electrical resistance can be gained. And, since an appropriate amount of TiO2 and/or SnO2 is contained, an initial permeability is kept adequately high, whereby an excellent soft magnetism can be achieved in a high frequency band such as 1 MHz.

摘要翻译： Mn-Zn铁氧体包括44.0至49.8mol％的Fe 2 O 3 3，4.0至26.5mol％的ZnO，0.1至4.0mol％的TiO 2中的至少一种的基础组分 2％，和SnO 2，0.5mol％或更少的Mn 2 O 3 3，其余由MnO， 含有0.20质量％CaO作为添加剂。 由于Mn-Zn铁氧体含有少于50摩尔％的Fe 2 O 3 O 3和少量（0.5摩尔％以下）的Mn 2 O 3 即使CaO含量大于0.20质量％，也不会发生异常的晶粒生长，可以获得高的电阻。 并且，由于含有适当量的TiO 2和/或SnO 2 N，所以初始磁导率保持足够高，从而可以获得高的软磁性 频段如1 MHz。

公开(公告)号：US06436308B2

公开(公告)日：2002-08-20

申请号：US09769296

申请日：2001-01-26

申请人： Osamu Kobayashi ,  Osamu Yamada ,  Kiyoshi Ito

发明人： Osamu Kobayashi ,  Osamu Yamada ,  Kiyoshi Ito

IPC分类号： B22F100

CPC分类号： H01F1/344 ,  C04B35/265 ,  C04B35/2658

摘要： The present invention provides a Mn—Zn ferrite having an electrical resistivity exceeding 1 &OHgr;m order and having a high initial permeability of 4000 or more at 100 kHz and 100 or more at 10 MHz. The main components of the Mn—Zn ferrite include 44.0 to 49.8 mol % Fe2O3, 15.0 to 26.5 mol % ZnO, 0.1 to 3.0 mol % CoO, 0.02 to 1.00 mol % Mn2O3, and the remainder MnO. The Mn—Zn ferrite can be used in a wide frequency region of 100 kHz to 10 MHz by limiting Fe2O3 content to a range of less than 50 mol %, that is the stoichiometric composition, inhibiting formation of Mn2O3 and adding a proper amount of CoO.

摘要翻译： 本发明提供一种Mn-Zn铁氧体，其电阻率超过1欧姆等级，并且在100kHz时具有4000或更高的初始磁导率，在10MHz时具有100或更高的初始磁导率。 Mn-Zn铁氧体的主要成分包括44.0〜49.8mol％的Fe2O3，15.0〜26.5mol％的ZnO，0.1〜3.0mol％的CoO，0.02〜1.00mol％的Mn2O3，余下的是MnO。 通过将Fe 2 O 3含量限制在小于50mol％，即化学计量组成的范围内，Mn-Zn铁氧体可以在100kHz至10MHz的宽频率区域中使用，抑制Mn 2 O 3的形成并添加适量的CoO 。

公开(公告)号：US06468441B1

公开(公告)日：2002-10-22

申请号：US09795133

申请日：2001-03-01

申请人： Osamu Kobayashi ,  Osamu Yamada ,  Kiyoshi Ito

发明人： Osamu Kobayashi ,  Osamu Yamada ,  Kiyoshi Ito

IPC分类号： C04B3526

CPC分类号： C04B35/2658 ,  C04B35/265

摘要： The present invention provides a Mn—Zn ferrite having an electrical resistivity exceeding 1 &OHgr;m order and a low core loss in a high frequency region exceeding 1 MHz. A basic component composition of the Mn—Zn ferrite includes 44.0 to 49.8 mol % of Fe2O3, 6.0 to 15.0 mol % of ZnO (15.0 mol % is excluded), 0.1 to 3.0 mol % of CoO, 0.02 to 1.20 mol % of Mn2O3, and the remainder of MnO. The Mn—Zn ferrite achieves desired purposes by controlling Fe2O3 content to a range less than 50 mol % that is the stoichiometric composition, adding a proper amount of CoO, restraining amount of Mn2O3 formation to 1.20 mol % or less, and further setting their average grain sizes to less than 10 &mgr;m.

摘要翻译： 本发明提供一种电阻率超过1欧姆等级的Mn-Zn铁氧体，超高于1MHz的高频区域的低铁损。 Mn-Zn铁氧体的基本成分组成包括Fe2O3为44.0〜49.8mol％，ZnO为6.0〜15.0mol％（不包括15.0mol％），CoO为0.1〜3.0mol％，Mn2O3为0.02〜1.20mol％ 和剩余的MnO。 Mn-Zn铁氧体通过将Fe 2 O 3含量控制在化学计量组成小于50摩尔％的范围内，添加适量的CoO，抑制Mn2O3的形成量为1.20摩尔％以下，进一步设定其平均值 粒径小于10um。

公开(公告)号：US06461531B2

公开(公告)日：2002-10-08

申请号：US09795116

申请日：2001-03-01

申请人： Osamu Kobayashi ,  Osamu Yamada ,  Kiyoshi Ito

发明人： Osamu Kobayashi ,  Osamu Yamada ,  Kiyoshi Ito

IPC分类号： C04B3526

CPC分类号： C04B35/2658

摘要： The present invention provides a Mn—Zn ferrite having an electrical resistivity exceeding 1 &OHgr;m order and having a low core loss in a high frequency region exceeding 1 MHz. The basic component composition of the Mn—Zn ferrite includes 44.0 to 49.8 mol % Fe2O3, 6.0 to 15.0 mol % ZnO (15.0 mol % is excluded), 0.1 to 4.0 mol % at least one of TiO2 and SnO2, and remainder MnO, wherein desired results are obtained by limiting Fe2O3 content to less than 50 mol % that is the stoichiometric composition and adding a proper amount of TiO2 or SnO2 and further controlling its average grain size to less than 10 &mgr;m.

摘要翻译： 本发明提供一种具有超过1欧姆等级的电阻率并且在超过1MHz的高频区域具有低铁损的Mn-Zn铁氧体。 Mn-Zn系铁氧体的基本成分组成包括Fe2O3为44.0〜49.8mol％，ZnO为6.0〜15.0mol％（不包括15.0mol％），TiO 2和SnO 2中的至少一种为0.1〜4.0mol％，余量为MnO，其中， 通过将Fe 2 O 3含量限制为小于化学计量组成的50mol％并加入适量的TiO 2或SnO 2并进一步控制其平均晶粒尺寸小于10um而得到期望的结果。