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1. 发明专利

JP2002134329A MAGNETIC PARTS FOR SUPPRESSING COMMON MODE LIGHTNING SURGE CURRENT OF SIGNAL LINK 失效
公开(公告)号：JP2002134329A
公开(公告)日：2002-05-10
申请号：JP2000323934
申请日：2000-10-24
申请人： HITACHI METALS LTD , HITACHI FERRITE ELECT LTD , SANKOSHA CO LTD
发明人： NAKAJIMA SUSUMU , OGURA KATSUHIRO , KUBOTA SADAMI , OKABAYASHI CHIKASHI , ASADA KEIJI
IPC分类号： H01F17/06 , H02H9/02 , H03H7/09
摘要： PROBLEM TO BE SOLVED: To provide magnetic parts for suppressing lightning surge current of signal link which have a small size and little fluctuations in high performance and are highly reliable and practical. SOLUTION: The magnetic parts are constituted by winding a signal line around a magnetic core, so as to suppress common mode lightning surge currents flowing in a signal link. The magnetic core is constituted of a metallic soft magnetic thin alloy belt having an effective saturation magnetic flux density Bs of >=1 T in the DC magnetic characteristics measured by adjusting the maximum amplitude of a DC magnetic field to ±800 A/m, an aspect ratio Br/Bs, expressed by the ratio of the saturation magnetic flux density Bs to the effective residual magnetic flux density Br of =500, when the operating magnetic flux density ΔB is 0.5 T.

2. 发明专利

JP2002078192A COMMON MODE LIGHTNING SURGE CURRENT SUPPRESSING MAGNET FOR SIGNAL COMMUNICATION LINE 失效
公开(公告)号：JP2002078192A
公开(公告)日：2002-03-15
申请号：JP2000255026
申请日：2000-08-25
申请人： HITACHI METALS LTD , HITACHI FERRITE ELECT LTD , SANKOSHA CO LTD
发明人： NAKAJIMA SUSUMU , OGURA KATSUHIRO , OKABAYASHI CHIKASHI , ASADA KEIJI
IPC分类号： H01F1/153 , H01F1/147 , H01F17/06 , H02H7/20 , H02H9/02 , H03H7/01 , H04B3/50
摘要： PROBLEM TO BE SOLVED: To easily carry out a common mode lightning surge current suppression without interrupting the service for the mobile communication base stations. SOLUTION: This common mode lightning surge current suppression magnet is to suppress the common mode lightning surge current, and formed to surround the signal communication line by dividing the magnetic core by a plane parallel to the axis and contacting the cut surfaces closely.

3. 发明专利

JP2002353045A POWER TRANSFORMER AND POWER CONVERTER COMPRISING IT 失效
公开(公告)号：JP2002353045A
公开(公告)日：2002-12-06
申请号：JP2001159783
申请日：2001-05-29
申请人： HITACHI METALS LTD , HITACHI FERRITE ELECT LTD
发明人： FUJII ATSUSHI , NAKAJIMA SUSUMU , OGURA KATSUHIRO
IPC分类号： H01F27/28 , H01F27/25 , H01F30/00 , H01F41/04 , H02M3/28
摘要： PROBLEM TO BE SOLVED: To provide a small, high efficiency power transformer and a highly reliable, small, high efficiency, low noise power converter comprising it. SOLUTION: In the power transformer comprising a core formed by winding a thin band of soft magnetic alloy, and a planar conductor winding, the core formed of thin band of soft magnetic alloy has a frame shape of no-cut closed magnetic path, and primary and secondary windings are formed by connecting substantally U-shaped planar conductors while laminating alternately. A required volume resulting from the winding is suppressed by setting the width of the substantally U-shaped planar conductor on the outside of the core smaller as compared with the width of the planar conductor passing through the inside of the core and similarly setting the width of the linear planar conductor connecting the substantally U-shaped planar conductors smaller as compared with the width of the substantally U-shaped planar conductor on the inside of the core.

4. 发明专利

JP2002237417A POWER TRANSFORMER AND POWER CONVERTER USING IT 失效
公开(公告)号：JP2002237417A
公开(公告)日：2002-08-23
申请号：JP2001031474
申请日：2001-02-07
申请人： HITACHI METALS LTD , HITACHI FERRITE ELECT LTD
发明人： FUJII ATSUSHI , NAKAJIMA SUSUMU , OGURA KATSUHIRO
IPC分类号： H01F27/28
摘要： PROBLEM TO BE SOLVED: To provide a power transformer which is small in size, high in efficiency, and low in radiation noise and can be manufactured easily, and to provide a power converter which uses the transformer and is small in size, high in efficiency and reliability, and low in noise. SOLUTION: The power transformer constituted by using plate type windings is composed of a non-cut magnetic core constituted by using a thin soft magnetic alloy band and a laminated plate type winding constituted by using the required number of plate-type windings which are insulated at necessary spots as primary and secondary windings to be wound around the magnetic core so that the number of turns of the windings becomes a prescribed value.

5. 发明专利

JP2001250726A SATURABLE REACTOR AND POWER CONVERTER USING IT 失效
公开(公告)号：JP2001250726A
公开(公告)日：2001-09-14
申请号：JP2000062094
申请日：2000-03-07
申请人： HITACHI METALS LTD , HITACHI FERRITE ELECT LTD
发明人： NAKAJIMA SUSUMU , OGURA KATSUHIRO
IPC分类号： H01F27/24 , H01F27/25 , H01F37/00 , H02M3/155
摘要： PROBLEM TO BE SOLVED: To provide a highly efficient, low-noise, and high-reliability power converter. SOLUTION: A saturable reactor is constituted to reduce the temperature rise caused by a core loss by means of heat sinks provided on both end faces of a wound magnetic core composed of a thin soft magnetic alloy band. The heat sinks are closely adhered to both end faces of the wound core through an insulating material having a high coefficient of thermal conductivity, and thermal conductors are arranged on the internal surface of the wound core to conduct the heat generated on the internal surface by the core loss to the heat sinks.

6. 发明专利

JP2001118733A HIGH FREQUENCY POWER TRANSFORMER AND POWER CONVERTER USING THE SAME 失效
公开(公告)号：JP2001118733A
公开(公告)日：2001-04-27
申请号：JP29800799
申请日：1999-10-20
申请人： HITACHI METALS LTD
发明人： NAKAJIMA SUSUMU , FUJII ATSUSHI , HASUMURA SHIGERU , OGURA KATSUHIRO
IPC分类号： H01F27/28 , H01F27/25 , H01F30/00 , H02M3/28
摘要： PROBLEM TO BE SOLVED: To provide a high frequency power transformer wherein a primary winding having no center tap and at least a pair of secondary windings having center taps for outputting full-wave rectified current are arranged on a nanocrystal soft magnetic alloy thin belt magnetic core, and a power converter of high efficiency and reliability which uses the high frequency power transformer. SOLUTION: In a no-cut nanocrystal soft magnetic alloy thin belt magnetic core, Fe wherein peak value of magnetizing force is 0.05 A/m and permeability at a frequency of 20 kHz is larger than 30,000 and at most 80,000 is selected as the main component, and fine crystal grains whose crystal grain diameter is at most 50 nm occupies at least 50% of a total volume of the texture. In a high frequency power transformer, a primary winding having no center tap and at least a pair of secondary windings for outputting full-wave rectified current are arranged on the nanocrystal soft magnetic alloy thin belt magnetic core. Two coupling coefficients at 20 kHz of the primary winding and the respective secondary windings which are main outputs of the primary winding are at least 0.9999. A value that a larger leakage inductance which is measured from the primary winding by short-circutting the respective secondary windings as the main outputs is divided by a smaller leakage inductance is at most 1.1.

7. 发明专利

JP2000164436A HIGH FREQUENCY POWER TRANSFORMER AND POWER CONVERTER USING THE SAME 失效
公开(公告)号：JP2000164436A
公开(公告)日：2000-06-16
申请号：JP34009098
申请日：1998-11-30
申请人： HITACHI METALS LTD , HITACHI KINZOKU KIKO KK
发明人： NAKAJIMA SUSUMU , ARAKI HIROKAZU , HASUMURA SHIGERU , OGURA KATSUHIRO
IPC分类号： H01F27/34 , H02M3/28
摘要： PROBLEM TO BE SOLVED: To provide a high frequency power transformer equipped with a primary coil without any center tap and a secondary coil with at least one set of center taps at a compact no-cut nano crystal soft magnetic alloy thin band coil magnetic core with a low magnetic core loss, and a power converter with high efficiency and high reliability using this high frequency power transformer. SOLUTION: This is a high frequency power transformer which is provided with a primary coil without any center tap and a secondary coil with at least one set of center taps, at a no-cut nano crystal soft magnetic alloy thin band coil magnetic core in which Fe is used as main component, and fine crystal particles whose crystal particle diameter is 50 nm or less occupy 50% or more of the whole volume of the organization. In this high frequency power transformer, the value of a leakage inductance in 50 kHz measured at the edge of the primary coil by short-circuiting the whole edge of the secondary coil is set so as to be 0.3 μH or less, relative permeability at that time is set so as to be 20,000 or more, or a square rate Br/Bs as the rate of residual magnetic flux density Br to saturated magnetic flux density Bs in the DC magnetic characteristics of the nano crystal soft magnetic alloy thin band coil magnetic core is set so as to be 0.2 or less. Then, it is possible to provide a power converter using this high frequency power transfer.

8. 发明专利

JP2008192897A Dust core and reactor 审中-公开
标题翻译：粉尘和反应器
公开(公告)号：JP2008192897A
公开(公告)日：2008-08-21
申请号：JP2007026753
申请日：2007-02-06
申请人： Hitachi Metals Ltd , 日立金属株式会社
发明人： HAMAKAKE HIROTAKA , NISHIMURA KAZUNORI , NISHIO YOSHIMASA , OGURA KATSUHIRO , USHIJIMA MAKOTO
IPC分类号： H01F1/22 , B22F1/00 , C22C38/00 , H01F27/255
摘要： PROBLEM TO BE SOLVED: To provide a dust core and a reactor which can be suitable for a large current reactor dust core, good in inductance current characteristic, suppress increase in the reactor loss caused by gap fringing field and minimize deterioration of characteristics with low noise even when driven for a long time.
SOLUTION: The dust core is used, which comprises Fe-Si-based alloy powder containing 5-8% of Si by mass, pure Fe powder having Fe exceeding 99.5% by mass, and inorganic insulating binder uniformly present between these mixed powder particles. The pure Fe powder is in a weight ratio of 10 to 55% to the entirety.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：为了提供可以适用于大电流反应堆堆芯的集尘芯和电抗器，具有良好的电感电流特性，抑制了由间隙边缘引起的电抗器损耗的增加并使特性的劣化最小化噪音低，即使长时间驱动。
解决方案：使用防尘芯，其包含含有5-8质量％的Fe-Si基合金粉末，Fe超过99.5质量％的纯Fe粉末和在这些混合物之间均匀存在的无机绝缘粘合剂粉末颗粒。纯Fe粉末的重量比为10〜55％。版权所有（C）2008，JPO＆INPIT

9. 发明专利

JP2000165173A LINE NOISE FILTER AND POWER CONVERTER USING THE SAME 失效
公开(公告)号：JP2000165173A
公开(公告)日：2000-06-16
申请号：JP33556598
申请日：1998-11-26
申请人： HITACHI METALS LTD
发明人： NAKAJIMA SUSUMU , OGURA KATSUHIRO
IPC分类号： H01F1/14 , H01F37/00 , H02M1/12 , H03H7/09
摘要： PROBLEM TO BE SOLVED: To minimize a filter and to suppress noise by constituting structuring material of a magnetic core to constitute the filter of Fe based soft magnetic alloy and specifying dimension of a crystal grain to constitute the Fe base soft magnetic alloy and existence ratio of system with specified grain diameter. SOLUTION: A noise filter is provided with the crystal grains whose average of the grain diameter measured by maximum dimension is equal to or less than 50 nm and is a line noise filter constituted by using the magnetic core constituted of the Fe based soft magnetic alloy in which the crystal grains occupies at least 50% of the system. Capacitors 21, 22, 23 are connected between power lines on the input side of the filter. The capacitors are preferably connected between respective lines on the output side of the line noise filter and in addition, at least one crystal grain micronization element which is selected from a group consisting of Si and/or B, Cu, Nb, Ta, W, Mo, Zr, Hf, V and Ti is preferably included in the Fe based magnetic alloy.

10. 发明专利

JPH11176649A MAGNETIC CORE 失效
公开(公告)号：JPH11176649A
公开(公告)日：1999-07-02
申请号：JP34152997
申请日：1997-12-11
申请人： HITACHI METALS LTD
发明人： IKEMOTO OSAMU , YAMAGUCHI AKIRA , MOTOMURA KOJI , OGURA KATSUHIRO
IPC分类号： H01F27/06 , H01F17/06 , H01F27/26 , H01F37/00
摘要： PROBLEM TO BE SOLVED: To simplify detaching of an annular magnetic core and a pedestal, reduce manhour and improve quality, by fixing the annular magnetic core to the holding pedestal via an expansion member by using a clamping band. SOLUTION: A pedestal 2 forms a circular recess conforming with the outer peripheral shape of an annular magnetic core 1, and the annular magnetic core 1 is arranged in the recess. A clamping band 3 is arranged on the outer periphery of the annular magnetic core 1 and fixed to anchor parts 6 of the pedestal 2 by using screws, and the annular magnetic core 1 and the pedestal 2 are fixed. In this case, one side fixing part is fixed via a spring as an expansion member. Regarding the annular magnetic core 1, movement in the radial direction can be restrained by the clamping band 3 and movement in the axial direction can be restrained by a protruding part 5 of the pedestal 2, so that the annular magnetic core 1 can be surely fixed to the pedestal 2.

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