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1. 发明授权

US5821647A Spindle motor 失效
标题翻译：主轴电机
公开(公告)号：US5821647A
公开(公告)日：1998-10-13
申请号：US760450
申请日：1996-12-06
申请人： Isamu Takehara , Hirotada Shimaguchi , Masashi Ogawa
发明人： Isamu Takehara , Hirotada Shimaguchi , Masashi Ogawa
IPC分类号： G02B26/12 , H02K5/16 , H02K7/14 , H02K21/14 , H02K29/00 , H02K29/08 , H04N1/113 , H02K7/00 , G02B26/08
CPC分类号： H02K5/161 , G02B26/121 , H02K7/14 , H02K21/14 , H02K2205/12 , H02K29/08
摘要： A spindle motor comprises a rotational member supported by bearings for rotation about a rotational axis, a rotational body and a motor rotor mounted on the rotational member for rotation therewith, and a motor stator mounted around the motor rotor. The rotational body has an outer diameter determined so that a windage loss of the rotational body is proportional to the third power of a peripheral velocity of the rotational body and an air gap diameter of the bearings and the diameter of the motor stator are determined so that the air loss of each of the bearings and the motor rotor is proportional to the square of the peripheral velocity of each of the bearings and the motor rotor at a range of constant speed of rotation of the rotational member.
摘要翻译：主轴电动机包括由围绕旋转轴线旋转的轴承支撑的旋转构件，安装在旋转构件上用于旋转的旋转体和电动机转子以及围绕电动机转子安装的电动机定子。旋转体具有确定的外径，使得旋转体的风阻损失与旋转体的圆周速度的第三功率成正比，并且确定轴承的气隙直径和电动机定子的直径，使得每个轴承和电动机转子的空气损失与旋转构件的恒定转速范围内的每个轴承和电动机转子的圆周速度的平方成正比。

2. 发明授权

US5804896A High speed spindle motor and apparatus equipped with high speed spindle motor 失效
标题翻译：高速主轴电机和配备高速主轴电机的设备
公开(公告)号：US5804896A
公开(公告)日：1998-09-08
申请号：US575144
申请日：1995-12-19
申请人： Isamu Takehara , Masashi Ogawa , Hirotada Shimaguchi
发明人： Isamu Takehara , Masashi Ogawa , Hirotada Shimaguchi
IPC分类号： H02K1/16 , H02K3/04 , H02K3/12 , H02K3/28 , H02K21/14 , H02K29/03 , H02K7/00 , H02K11/00
CPC分类号： H02K21/14 , H02K1/165 , H02K29/03 , H02K3/12 , H02K3/28
摘要： A spindle motor comprises a permanent magnet having an outer diameter, an outer circumference, and a number of poles. A stator core is disposed around and spaced from the outer circumference of the permanent magnet rotor. The stator core has a yoke portion, a number of lengthwise extending and circumferentially spaced slots, and a tooth portion between each adjacent two of the slots. The slots are disposed in close proximity to the outer circumference of the permanent magnet rotor, and a width of each of the slots in a radial direction of the stator core is smaller than a width of the yoke portion and equal to or greater than 1/20 of the outer diameter of the permanent magnet rotor. A coil has two or less turns and is comprised of a conductor disposed in the slots of the stator core.
摘要翻译：主轴电动机包括具有外径，外周和极数的永磁体。定子芯设置在永久磁铁转子的外周周围并与其隔开。定子铁芯具有轭部分，多个纵向延伸且周向间隔开的槽，以及每个相邻两个槽之间的齿部分。狭槽设置在紧邻永磁转子的外圆周的位置，并且每个槽在定子铁芯的径向上的宽度小于轭部的宽度并等于或大于+ E ，为永磁转子外径的1/20 + EE。线圈具有两个或更少的匝，并且由设置在定子芯的槽中的导体构成。

3. 发明授权

US6040648A Spindle motor and rotator device 有权
标题翻译：主轴电机和转子装置
公开(公告)号：US6040648A
公开(公告)日：2000-03-21
申请号：US235671
申请日：1999-01-22
申请人： Naoki Kawawada , Hiroaki Namiki , Isamu Takehara , Tadao Iwaki , Takashi Ishida , Shinichi Hayashizaki , Hirotada Shimaguchi , Katsushige Konno
发明人： Naoki Kawawada , Hiroaki Namiki , Isamu Takehara , Tadao Iwaki , Takashi Ishida , Shinichi Hayashizaki , Hirotada Shimaguchi , Katsushige Konno
IPC分类号： F16C17/10 , F16C33/10 , H02K7/08 , H02K21/22 , H02K29/00 , H02K5/16 , F16C32/06
CPC分类号： F16C33/107 , F16C17/107 , H02K7/085
摘要： A spindle motor having a simplified construction with reduced axial and radial deflection while avoiding the half whirl phenomenon includes a motor frame, a rotating shaft supporting a rotor, a stator and stator coil, a permanent magnet opposing the stator, and a liquid dynamic pressure bearing. Magnetic centers of the permanent magnet and stator coil, in the axial direction of the rotating shaft, are substantially matched. The liquid dynamic pressure bearing comprises opposing surfaces of the rotating shaft and the housing. The rotating shaft has a disk-shaped thrust bearing portion disposed in a first portion of a cylindrical hole of the housing, and a radial bearing portion disposed in a second portion of the cylindrical hole. Lubricating oil fills a space between the cylindrical hole and the thrust bearing portion and radial bearing portion, and a presser ring is pressed and fixed into a third portion of the cylindrical hole to seal the bearing. A boss portion of the rotor is fixed to a rotor supporting portion of the rotating shaft so that an inner peripheral surface of the boss portion mates with an outer peripheral surface of the rotor supporting portion. The rotating shaft has three axially-spaced portions, with the disk-shaped thrust bearing portion formed between and having a larger diameter than the other portions. A stage is provided between the thrust bearing portion and the rotor supporting portion to serve as a seat for installation of the boss portion.
摘要翻译：具有减小的轴向和径向偏转同时避免半旋转现象的简化结构的主轴电机包括马达框架，支撑转子的旋转轴，定子和定子线圈，与定子相对的永磁体以及液体动压轴承。永久磁铁和定子线圈在旋转轴的轴向方向上的磁心基本匹配。液体动压轴承包括旋转轴和壳体的相对表面。旋转轴具有设置在壳体的圆筒孔的第一部分中的盘形推力轴承部分和设置在圆柱形孔的第二部分中的径向支承部分。润滑油填充圆柱形孔与推力轴承部分和径向支承部分之间的空间，并且压紧环被压紧并固定到圆柱形孔的第三部分中以密封轴承。转子的凸台部固定在转轴的转子支承部上，使凸台部的内周面与转子支承部的外周面配合。旋转轴具有三个轴向间隔开的部分，其中盘形止推轴承部分形成在直径大于其它部分的直径之间。在推力轴承部分和转子支撑部分之间设置有用作安装凸起部分的座的台架。

4. 发明授权

US07307364B2 Motor and recording medium drive device 有权
标题翻译：电机和记录介质驱动装置
公开(公告)号：US07307364B2
公开(公告)日：2007-12-11
申请号：US10549297
申请日：2003-03-19
申请人： Isamu Takehara , Shinji Kinoshita
发明人： Isamu Takehara , Shinji Kinoshita
IPC分类号： H02K5/16
CPC分类号： F16C33/107 , F16C17/026 , F16C17/10 , F16C2370/12 , G11B19/2009 , H02K7/085
摘要： The invention provides a motor that is provided with a fluid dynamic bearing for rotatably supporting a shaft body, by the dynamic pressure of fluid filling a clearance between itself and a shaft body support part. The motor is provided with: a stator having cores and coils; a rotor having permanent magnets arranged in a ring shape on the radial inner side of the stator, facing the cores and coils; and a fluid dynamic bearing which rotatably supports the rotor with respect to the stator. The fluid dynamic bearing is provided with: a cylindrical shaft body whose cross section is approximately cruciform; a shaft body support part, in which a shaft body insertion hole is formed for accommodating the shaft body; and a fluid which is filled into a clearance formed between the shaft body and the shaft body insertion hole, and there is provided a dynamic pressure generation unit comprising the fluid, and dynamic pressure generating grooves formed in at least one of the outer face of the shaft body, and the inner face of the shaft body insertion hole facing this outer face.
摘要翻译：本发明提供了一种电动机，其具有用于可旋转地支撑轴体的流体动力轴承，通过填充其本身与轴体支撑部分之间的间隙的流体的动态压力。电动机设有：具有铁芯和线圈的定子; 具有永磁体的转子，该永磁体以定子的径向内侧布置成环形，面对所述芯和线圈; 以及相对于定子可旋转地支撑转子的流体动力轴承。流体动力轴承设有：截面近似十字形的圆柱形轴体; 轴体支撑部，其中形成有用于容纳所述轴体的轴体插入孔; 以及填充在轴体和轴体插入孔之间形成的间隙中的流体，并且设置有包括流体的动压产生单元和形成在所述轴体的至少一个的动压生成槽轴体和轴体插入孔的面向该外表面的内表面。

5. 发明申请

US20100259122A1 Magnetic member, motor device, magnetizing method, and storage device 审中-公开
标题翻译：磁性部件，电机装置，磁化方法和存储装置
公开(公告)号：US20100259122A1
公开(公告)日：2010-10-14
申请号：US12660738
申请日：2010-03-03
申请人： Isamu Takehara , Shinji Kinoshita , Hiromitsu Gotoh
发明人： Isamu Takehara , Shinji Kinoshita , Hiromitsu Gotoh
IPC分类号： H02K21/22 , H02K15/03
CPC分类号： H02K1/2786 , H02K15/03 , H02K21/22 , Y10T29/49012
摘要： A method of magnetizing a magnetic member for a rotor of a motor device. The magnetic member has a thickness t in the radial direction of the magnetic member satisfying the relation πD/(0.75MP−π)
摘要翻译：一种磁化用于电动机装置的转子的磁性部件的方法。磁性部件的磁性部件的径向方向的厚度t满足关系式p / Dgr（D）（0.75MP-＆pgr;）

6. 发明申请

US20060255677A1 Magnetic member, motor device, magnetizing method and storage device 审中-公开
标题翻译：磁性元件，电机装置，磁化方法及存储装置
公开(公告)号：US20060255677A1
公开(公告)日：2006-11-16
申请号：US11406165
申请日：2006-04-18
申请人： Isamu Takehara , Shinji Kinoshita , Hiromitsu Gotoh
发明人： Isamu Takehara , Shinji Kinoshita , Hiromitsu Gotoh
IPC分类号： H02K21/12
CPC分类号： H02K1/2786 , H02K15/03 , H02K21/22 , Y10T29/49012
摘要： Reducing cogging of a small permanent magnet, while maintaining its magnetization characteristics favorable. Denoting the inner diameter of the permanent magnet by D, the pitch per one magnetic pole by P, and the phase number of an alternating current by M, and when D is 20 mm or less and the thickness of the permanent magnet t is set to fulfill the formula (4), then a good permanent magnet with low cogging is obtained. πD/(0.75PM−π)
摘要翻译：减小小永磁体的齿槽，同时保持其磁化特性。将永磁体的内径表示为D，将每个磁极的间距设为P，将交流电的相位数设为M，当D为20mm以下，将永久磁铁t的厚度设定为满足公式（4），得到具有低齿槽的良好永磁体。 piD /（0.75PM-pi）

7. 发明申请

US20050174004A1 Permanent magnet for motor, motor and magnetizing method 审中-公开
标题翻译：电机，电机和磁化方法永磁
公开(公告)号：US20050174004A1
公开(公告)日：2005-08-11
申请号：US10525886
申请日：2003-09-29
申请人： Isamu Takehara , Shinji Kinoshita , Hiromitsu Gotoh
发明人： Isamu Takehara , Shinji Kinoshita , Hiromitsu Gotoh
IPC分类号： H01F1/053 , H01F13/00 , H01F41/02 , H02K1/27 , H02K15/03 , H02K21/22
CPC分类号： H02K21/222 , H01F13/003 , H01F41/028 , H02K1/2786 , H02K15/03 , Y10T29/49009 , Y10T29/49075
摘要： The present invention relates to a cylindrical permanent magnet which is used in a micro DC brushless motor used in a compact hard disc etc. An Sm—Co based magnetic material is used as a magnetic material and the permanent magnet has domains magnetized in a radial direction and arranged at regular intervals in a circumferential direction. Provided that P represents a pitch corresponding to an average of an inner circumferential length and outer circumferential length in one of the domains, D denotes an inner diameter of the permanent magnet, t represents a thickness in the radial direction, N represents the number of domains, and M represents the number of AC phases for driving the motor, D is set to 20 (mm) or smaller and t is set to satisfy the relation of t≦πD/(NM−π).
摘要翻译：本发明涉及一种用于小型硬盘等的微型DC无刷电动机的圆筒型永久磁铁。作为磁性材料使用Sm-Co系磁性材料，永久磁铁具有沿径向磁化的磁畴并且沿圆周方向以规则的间隔布置。假设P表示与其中一个畴中的内圆周长度和外周长度的平均值相对应的间距，D表示永磁体的内径，t表示径向厚度，N表示畴的数量，M表示用于驱动电动机的交流相位数，D设定为20（mm）以下，t设定为满足t <= piD /（NM-pi）的关系。

8. 发明授权

US6163952A Method of manufacturing armature of motor using hoop member 失效
标题翻译：使用箍构件制造电机衔铁的方法
公开(公告)号：US6163952A
公开(公告)日：2000-12-26
申请号：US964589
申请日：1997-11-05
申请人： Isamu Takehara
发明人： Isamu Takehara
IPC分类号： H02K1/12 , G01N3/52 , H02K1/14 , H02K1/18 , H02K3/04 , H02K15/02 , H02K15/08 , H02K15/095
CPC分类号： G01N3/52 , H02K1/148 , H02K15/022 , H02K15/095 , Y10T29/49009 , Y10T29/49012 , Y10T29/49071 , Y10T29/49073 , Y10T29/49075
摘要： A motor armature having a simplified assembly comprises an inner cylinder and an outer cylinder arranged coaxially, and a plurality of pole pieces provided radially at equal intervals between the inner and outer cylinders. The inner cylinder is formed into a cylindrical shape by curling up in the longitudinal direction a first hoop member (band steel) formed of a magnetic material and having a predetermined thickness and length. The outer cylinder is formed of a second hoop member similar to the first hoop member. The pole pieces each comprise a wire piece cut from a wire formed of a magnetic material and having a coil would thereon. One end of each pole piece is welded to one of the hoop members and the other end of the pole pieces is welded to the other hoop member.
摘要翻译：具有简化的组件的电动机电枢包括同轴布置的内筒和外筒，以及在内筒和外筒之间以等间隔径向设置的多个极片。通过在纵向上卷曲由磁性材料形成并且具有预定厚度和长度的第一箍构件（带钢）而将内筒形成为圆柱形。外筒由类似于第一箍构件的第二箍构件形成。极片各自包括从由磁性材料形成并具有线圈的线切割的线片。每个极片的一端焊接到环形构件中的一个，并且极片的另一端焊接到另一个箍构件。

9. 发明授权

US5391954A Direct current motor 失效
标题翻译：直流电机
公开(公告)号：US5391954A
公开(公告)日：1995-02-21
申请号：US137482
申请日：1993-10-15
申请人： Isamu Takehara , Masaya Kawamura
发明人： Isamu Takehara , Masaya Kawamura
IPC分类号： H02K1/02 , H02K1/12 , H02K3/04 , H02K5/02 , H02K21/14 , H02K29/00
CPC分类号： H02K1/02 , H02K1/12 , H02K21/14 , H02K3/04
摘要： In a stationary coil type direct current motor, the motor comprises a case supported by a shaft, and the case is made of magnetic material being high saturation magnetic flux density and high magnetic permeability, whereby magnetic saturation and iron loss can be reduced. The motor is further provided with a plurality of coils mounted on the inner circumference of the case, and the shaft on which a magnet is secured. The magnet is arranged so as to be spaced a predetermined gap from the coils. Furthermore, the case may be a less iron loss material constructed of two layers. A plurality of coils ace mounted on the inner circumference of the case, and the magnet secured to the shaft is spaced a predetermined gap from the coils.
摘要翻译：在固定线圈型直流电动机中，电动机包括由轴支撑的壳体，壳体由高饱和磁通密度和高磁导率的磁性材料制成，从而可以降低磁饱和度和铁损。电动机还设置有安装在壳体的内周上的多个线圈和固定有磁体的轴。磁体布置成与线圈隔开预定的间隙。此外，这种情况可能是由两层构成的较少的铁损材料。安装在壳体的内周上的多个线圈ace和固定到轴的磁体与线圈隔开预定的间隙。

10. 发明授权

US07796357B2 Information recording and playback apparatus and method of manufacturing the same 有权
标题翻译：信息记录和播放装置及其制造方法
公开(公告)号：US07796357B2
公开(公告)日：2010-09-14
申请号：US11628892
申请日：2005-05-31
申请人： Isamu Takehara , Shinji Kinoshita , Hiromitsu Gotoh
发明人： Isamu Takehara , Shinji Kinoshita , Hiromitsu Gotoh
IPC分类号： G11B33/12
CPC分类号： G11B19/2009 , G11B33/1493 , H02K21/16
摘要： An object is to provide an information recording and playback apparatus that is capable of reducing, as much as possible, reading and writing errors caused by magnetic leakage flux on the inner peripheral side of a magnetic disk. An information recording and playback apparatus 1 includes a rotor R rotatably holding a magnetic disk 60 and being provided with a permanent magnet 51 on the outer peripheral surface; a stator core 3 fixed to a base member 2, the stator core 3 protruding to the inner side in the radial direction in such a manner as to oppose the permanent magnet 51, the stator core 3 including a plurality of stator poles 3a around which coils 3b are wound; a shield plate 70 disposed between the magnetic disk 60 and the stator core 3 in such a manner as to cover the stator core 3 and to have a small gap 62 between the rotating body R, the shielding plate 70 blocking magnetic flux from the permanent magnet 51 and the stator core 3; and a magnetic head 61 for carrying out recording and playback of the magnetic disk 60 by moving forward and backward between the shield plate 70 and the magnetic disk 60. The magnetic head 61 moves forward and backward on the stator poles 3a.
摘要翻译：本发明的目的是提供一种能够尽可能地减少磁盘内周侧的磁漏磁通引起的读写错误的信息记录再生装置。信息记录和重放装置1包括可旋转地保持磁盘60的转子R并且在外周表面上设置有永磁体51; 固定在基体2上的定子铁芯3，定子芯3以与永久磁铁51相对的方式向径向内侧突出的定子铁心3，定子铁芯3具有多个定子极3a，线圈 3b缠绕; 以覆盖定子芯3的方式设置在磁盘60和定子芯3之间的屏蔽板70，并且在旋转体R之间具有小间隙62，屏蔽板70阻挡来自永磁体的磁通量 51和定子铁心3; 以及用于通过在屏蔽板70和磁盘60之间前后移动来执行磁盘60的记录和重放的磁头61.磁头61在定子极3a上前后移动。

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