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1. 发明授权

US06222286B1 Stepping motor with rust inhibiting and eddy current minimizing characteristics 失效
标题翻译：步进电机具有防锈和涡流最小化的特点
公开(公告)号：US06222286B1
公开(公告)日：2001-04-24
申请号：US08738205
申请日：1996-10-25
申请人： Kazuyuki Watanabe , Hirofumi Nakano , Toshihiko Takemoto , Ryoji Hirota
发明人： Kazuyuki Watanabe , Hirofumi Nakano , Toshihiko Takemoto , Ryoji Hirota
IPC分类号： H02K502
CPC分类号： H02K1/02 , H02K37/14
摘要： In a stepping motor, stator yokes have a plurality of comb-tooth-shaped magnetic poles 5b, 6b, 7b and 8b in such a manner that the comb-tooth-shaped magnetic poles are opposed to each other coaxially to a rotor portion made from a permanent magnet magnetized to have multiple magnetic poles, and an excitation coil is fitted on the external circumference of the stator yokes and the excitation coil and the stator yokes are surrounded by a frame yoke. Each of the yokes is formed of an Fe—Cr alloy having a predetermined ferrite single-phase structure so that occurrence of eddy currents in an alternating-current magnetic field is suppressed.
摘要翻译：在步进电机中，定子轭具有多个梳齿形磁极5b，6b，7b和8b，使得梳齿形磁极彼此同轴地与由磁化为具有多个磁极的永久磁铁，并且励磁线圈安装在定子磁轭的外周上，励磁线圈和定子磁轭被框架磁轭围绕。每个轭由具有预定的铁氧体单相结构的Fe-Cr合金形成，从而抑制交流磁场中的涡流的发生。

2. 发明授权

US5211771A Soft magnetic alloy material 失效
标题翻译：软磁合金材料
公开(公告)号：US5211771A
公开(公告)日：1993-05-18
申请号：US848202
申请日：1992-03-10
申请人： Takuji Okiyama , Ryoji Hirota , Takuji Hara , Yutaka Kawai , Toshihiko Takemoto
发明人： Takuji Okiyama , Ryoji Hirota , Takuji Hara , Yutaka Kawai , Toshihiko Takemoto
IPC分类号： C21D6/00 , H01F1/16
CPC分类号： H01F1/16 , C21D6/001
摘要： Fe-Ni, Fe-Ni-Cr or Fe-Ni-Cr-Mo magnetic alloy material, the surface roughness of which is adjusted to Rz.gtoreq.0.5 or Ra.gtoreq.0.06, is disclosed. Parts made of this material has resistance to mutual adhesion or sticking when they are subjected to anealing treatment.

3. 发明授权

US06599376B2 FE-CR soft magnetic material and a method of manufacturing thereof 有权
标题翻译： FE-CR软磁材料及其制造方法
公开(公告)号：US06599376B2
公开(公告)日：2003-07-29
申请号：US09997386
申请日：2001-11-29
申请人： Hiroshi Morikawa , Tomoharu Shigetomi , Ryoji Hirota , Takashi Yamauchi
发明人： Hiroshi Morikawa , Tomoharu Shigetomi , Ryoji Hirota , Takashi Yamauchi
IPC分类号： H01F1147
CPC分类号： C22C38/18 , C21D6/002 , C21D8/1272 , C21D2211/005 , H01F1/147
摘要： A Fe-Cr soft magnetic material has electric resistivity not less than 50 &mgr;&OHgr;·cm and a metallurgical structure occupied by a ferrite phase at a surface ratio of 95% or more. A number of fine precipitates of 1 &mgr;m or less in particle size is controlled at a ratio not more than 6×105/mm2. The Fe-Cr alloy has the composition (expressed in mass or weight %) of C up to 0.05%, N up to 0.05%, Si up to 3.0%, Mn up to 1.0%, P up to 0.04%, S up to 1.0%, 5.0-20.0% Cr, Al up to 4.0%, 0-3% Mo, 0-0.5% Ti and the balance being essentially Fe under the conditions of (1) and (2). The Fe-Cr soft magnetic material is useful as a core, a yoke or the like installed in various types of magnetic sensors such as electric power steering, fuel injection systems for vehicles and A.C. magnetic circuits of solenoid valves, due to production of high magnetic induction in a high-frequency low-magnetic field: 4.3×%Cr+19.1×%Si+15.1×%Al+2.5×%Mo≧40.2 (1) 64×%Si+35×%Cr+480×%Ti+25×%Mo+490×%Al≧221×%C+247×%N+40×%Mn+80×%Ni+460 (2).
摘要翻译： Fe-Cr软磁材料的电阻率不小于50μΩEG·cm，并且以95％以上的表面比例由铁素体相占据的冶金结构。将1μm以下的粒径的微细析出物的数量控制在6×10 5 / mm 2以下。 Fe-Cr合金的组成（质量或重量％）C为0.05％以下，N：0.05％以下，Si：3.0％以下，Mn：1.0％以下，P：0.04％以下，S： 1.0％，5.0-20.0％Cr，Al至4.0％，0-3％Mo，0-0.5％Ti，余量基本上为Fe，条件为（1）和（2）。 Fe-Cr软磁性材料可用作安装在诸如电动助力转向器，用于车辆的燃料喷射系统和电磁阀的AC磁路的各种类型的磁传感器中的磁芯，磁轭等，由于产生高磁性感应高频低磁场：

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