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1. 发明授权

US5541460A Passive magnetic bearings for a spindle motor 失效
公开(公告)号：US5541460A
公开(公告)日：1996-07-30
申请号：US201676
申请日：1994-02-25
申请人： John C. Dunfield , Kamran Oveyssi , Gunter K. Heine
发明人： John C. Dunfield , Kamran Oveyssi , Gunter K. Heine
IPC分类号： F16C17/08 , F16C39/06 , G11B19/20 , H02K7/09 , H02K7/00
CPC分类号： F16C17/08 , F16C25/045 , F16C32/0417 , F16C32/0425 , F16C39/063 , G11B19/2009 , H02K7/09 , F16C2370/12
摘要： An apparatus for rotatably journaling a rotor of a spindle motor about a shaft comprising a plurality of annular ring multi-pole magnets, each ring comprised of a plurality of axially aligned magnets whose polarity is alternated along the radius of the ring. The annular ring multi-pole magnets are disposed on both the rotor and stator of a spindle motor in opposition in attraction mode, or a complete offset repulsion mode with like poles facing one another with an full offset, thereby forming a radially stable magnetic bearing for maintaining rotor displacement about a shaft in conjunction with a conventional axial pivot.

2. 发明授权

US6080352A Method of magnetizing a ring-shaped magnet 失效
标题翻译：磁化环形磁铁的方法
公开(公告)号：US6080352A
公开(公告)日：2000-06-27
申请号：US828487
申请日：1997-03-31
申请人： John C. Dunfield , Gunter K. Heine , Marcel Jufer , Kamran Oveyssi
发明人： John C. Dunfield , Gunter K. Heine , Marcel Jufer , Kamran Oveyssi
IPC分类号： H02K29/03 , B29C71/04 , H01F13/00
CPC分类号： H02K29/03 , Y10S264/58 , Y10T29/49075
摘要： A brushless permanent-magnet direct current motor has a permanent magnet which is magnetized to create an offset angle between detent and mutual torques for providing sufficient starting torque for all relative orientations between the stator and the rotor of the motor. This is accomplished by providing a permanent magnet in which the global magnetization of the magnet has been disrupted by the application of a local magnetic field to a portion of the magnet, thereby to provide a magnetic anomaly in the global magnetization. Also, a method of magnetization of the magnet is described.
摘要翻译：无刷永磁直流电动机具有永久磁铁，其被磁化以在制动和相互转矩之间产生偏移角，以提供用于电动机的定子和转子之间的所有相对取向的足够的启动转矩。这是通过提供一种永久磁铁来实现的，其中磁体的全局磁化已经通过对磁体的一部分施加局部磁场而被破坏，由此在全局磁化中提供磁异常。此外，描述了磁体的磁化方法。

3. 发明授权

US5619083A Passive magnetic bearings for a spindle motor 失效
标题翻译：用于主轴电机的无源磁轴承
公开(公告)号：US5619083A
公开(公告)日：1997-04-08
申请号：US458570
申请日：1995-06-02
申请人： John C. Dunfield , Kamran Oveyssi , Gunter K. Heine
发明人： John C. Dunfield , Kamran Oveyssi , Gunter K. Heine
IPC分类号： F16C17/08 , F16C39/06 , G11B19/20 , H02K7/09 , H02K21/14
CPC分类号： F16C17/08 , F16C25/045 , F16C32/0417 , F16C32/0425 , F16C39/063 , G11B19/2009 , H02K7/09 , F16C2370/12
摘要： An apparatus for rotatably journaling a rotor of a spindle motor about a shaft comprising a plurality of annular ring multi-pole magnets, each ring comprised of a plurality of axially aligned magnets whose polarity is alternated along the radius of the ring. The annular ring multi-pole magnets are disposed on both the rotor and stator of a spindle motor in opposition in attraction mode, or a complete offset repulsion mode with like poles facing one another with an full offset, thereby forming a radially stable magnetic bearing for maintaining rotor displacement about a shaft in conjunction with a conventional axial pivot.
摘要翻译：一种用于将主轴电动机的转子围绕包括多个环形多极磁体的轴可旋转地旋转的装置，每个环由多个轴向对准的磁体组成，其极性沿着环的半径交替。环形多极磁铁在主轴电动机的转子和定子上以吸引模式相对设置，或者具有相同磁极彼此面对的全偏移斥力模式，从而形成径向稳定的磁轴承，结合传统的轴向枢轴保持绕轴的转子位移。

4. 发明授权

US5579188A Ironless spindle motor for disc drive 失效
标题翻译：无铁主轴电机用于磁盘驱动器
公开(公告)号：US5579188A
公开(公告)日：1996-11-26
申请号：US469643
申请日：1995-06-06
申请人： John C. Dunfield , Gunter K. Heine , Kamran Oveyssi , Marcel Jufer
发明人： John C. Dunfield , Gunter K. Heine , Kamran Oveyssi , Marcel Jufer
IPC分类号： G11B19/20 , H02K3/04 , H02K3/28 , H02K5/16 , H02K5/173 , H02K7/08 , H02K15/04 , H02K21/12 , H02K21/14 , H02K21/22 , H02K29/00 , G11B17/04 , G11B17/08
CPC分类号： H02K21/22 , G11B19/2009 , H02K15/0478 , H02K21/12 , H02K21/14 , H02K5/163 , H02K7/085 , H02K7/086 , H02K3/04 , H02K3/28 , H02K5/173
摘要： An "ironless" bearing spindle motor for rotating at least one disc about a central axis in a data storage device comprises a housing, a stationary member, a hub, and a stator. A rotor magnet is attached to the hub. A bearing interconnects the hub with the stationary member such that the hub and rotor magnet are rotatable about the central axis. The stator is coaxial with the hub and includes an ironless stator winding. The ironless stator winding minimizes low-harmonic acoustic vibration peaks in the spindle motor, resulting in a spindle motor having a very quiet operation.
摘要翻译：用于在数据存储装置中围绕中心轴旋转至少一个盘的“无铁”轴承主轴电机包括壳体，固定构件，轮毂和定子。转子磁体连接到轮毂。轴承将轮毂与固定构件互连，使得轮毂和转子磁体可围绕中心轴线旋转。定子与轮毂同轴并且包括无铁定子绕组。无铁定子绕组使主轴电机中的低谐波声振峰值最小化，导致主轴电机具有非常安静的操作。

5. 发明授权

US5610463A Passive magnetic bearings for a spindle motor 失效
标题翻译：用于主轴电机的无源磁轴承
公开(公告)号：US5610463A
公开(公告)日：1997-03-11
申请号：US459113
申请日：1995-06-02
申请人： John C. Dunfield , Kamran Oveyssi , Gunter K. Heine
发明人： John C. Dunfield , Kamran Oveyssi , Gunter K. Heine
IPC分类号： F16C17/08 , F16C39/06 , G11B19/20 , H02K7/09 , H02K21/14
CPC分类号： F16C17/08 , F16C25/045 , F16C32/0417 , F16C32/0425 , F16C39/063 , G11B19/2009 , H02K7/09 , F16C2370/12
摘要： An apparatus for rotatably journaling a rotor of a spindle motor about a shaft comprising a plurality of annular ring multipole magnets, each ring comprised of a plurality of axially aligned magnets whose polarity is alternated along the radius of the ring. The annular ring multi-pole magnets are disposed on both the rotor and stator of a spindle motor in opposition in attraction mode, or a complete offset repulsion mode with like poles facing one another with an full offset, thereby forming a radially stable magnetic bearing for maintaining rotor displacement about a shaft in conjunction with a conventional axial pivot.
摘要翻译：一种用于将主轴电动机的转子围绕包括多个环形多极磁体的轴可旋转地旋转的装置，每个环由多个轴向对准的磁体组成，其极性沿着环的半径交替。环形多极磁铁在主轴电动机的转子和定子上以吸引模式相对设置，或者具有相同磁极彼此面对的全偏移斥力模式，从而形成径向稳定的磁轴承，结合传统的轴向枢轴保持绕轴的转子位移。

6. 发明授权

US5598071A Method for starting and commutating a permanent-magnet direct current motor having a single phase winding 失效
标题翻译：具有单相绕组的永磁直流电动机的起动和换向的方法
公开(公告)号：US5598071A
公开(公告)日：1997-01-28
申请号：US483074
申请日：1995-06-07
申请人： John C. Dunfield , Gunter K. Heine , Marcel Jufer , Kamran Oveyssi
发明人： John C. Dunfield , Gunter K. Heine , Marcel Jufer , Kamran Oveyssi
IPC分类号： H02K29/03 , H02P6/22 , H02P1/00
CPC分类号： H02K29/03 , H02P6/22
摘要： Starting of single phase permanent magnet direct current motors in the desired direction of rotation is accomplished by providing a look up table stored in memory giving the correct sign or polarity of current for the angular position of the permanent magnet rotor of the motor. This stored look up table is developed by initially injecting current pulses of opposite polarity at different angular positions of the rotor, determining the difference between the rise times, and mapping the sign and the magnitude of the differences versus angular position. Thereafter, to start the motor in the correct direction, it is only necessary to inject current pulses of opposite polarity to know the angular position of the rotor and the polarity of the current required to start the motor in the correct direction. After the motor has been started, it is commutated by blanking the drive current at the zero crossings of the back emf. The current is turned off prior to a back emf crossing, and turned back on after the back emf crossing. The stored look up table tells how long to apply drive current before blanking because the table indicates how far away the zero crossing is, which is convened into the time remaining before blanking the drive current. Several embodiments of single phase motors are disclosed, as well as circuits useful for starting a motor and sensing back emf.
摘要翻译：通过提供存储在存储器中的查询表来实现在期望的旋转方向上的单相永磁直流电动机的起动，为电动机的永磁转子的角位置提供正确的电流值或极性。通过在转子的不同角位置初始地注入相反极性的电流脉冲，确定上升时间之间的差异，以及映射差异与角位置的符号和幅度，来开发该存储的查找表。此后，为了以正确的方向启动电动机，仅需要注入相反极性的电流脉冲，以知道转子的角位置和正确方向启动电动机所需的电流极性。电机起动后，通过在后电动势过零点处消除驱动电流进行换向。电流在后方电流通过之前关闭，并在后方电流通过后转回。存储的查询表指示在消隐之前应用驱动器电流多长时间，因为该表指示过零点过多的距离，这将在消隐驱动电流之前进入剩余时间。公开了单相电动机的几个实施例，以及可用于起动电动机和感测反电动势的电路。

7. 发明授权

US5578882A Passive magnetic bearings for a spindle motor 失效
标题翻译：用于主轴电机的无源磁轴承
公开(公告)号：US5578882A
公开(公告)日：1996-11-26
申请号：US460648
申请日：1995-06-02
申请人： John C. Dunfield , Kamran Oveyssi , Gunter K. Heine
发明人： John C. Dunfield , Kamran Oveyssi , Gunter K. Heine
IPC分类号： F16C17/08 , F16C39/06 , G11B19/20 , H02K7/09 , H02K21/14
CPC分类号： F16C17/08 , F16C25/045 , F16C32/0417 , F16C32/0425 , F16C39/063 , G11B19/2009 , H02K7/09 , F16C2370/12
摘要： An apparatus for rotatably journaling a rotor of a spindle motor about a shaft comprising a plurality of annular ring multi-pole magnets, each ring comprised of a plurality of axially aligned magnets whose polarity is alternated along the radius of the ring. The annular ring multi-pole magnets are disposed on both the rotor and stator of a spindle motor in opposition in attraction mode, or a complete offset repulsion mode with like poles facing one another with an full offset, thereby forming a radially stable magnetic bearing for maintaining rotor displacement about a shaft in conjunction with a conventional axial pivot.
摘要翻译：一种用于将主轴电动机的转子围绕包括多个环形多极磁体的轴可旋转地旋转的装置，每个环由多个轴向对准的磁体组成，其极性沿着环的半径交替。环形多极磁铁在主轴电动机的转子和定子上以吸引模式相对设置，或者具有相同磁极彼此面对的全偏移斥力模式，从而形成径向稳定的磁轴承，结合传统的轴向枢轴保持绕轴的转子位移。

8. 发明授权

US5545937A Integrated passive magnetic bearing system and spindle permanent magnet for use in a spindle motor 失效
公开(公告)号：US5545937A
公开(公告)日：1996-08-13
申请号：US478270
申请日：1995-06-07
申请人： John C. Dunfield , Kamran Oveyssi
发明人： John C. Dunfield , Kamran Oveyssi
IPC分类号： F16C39/06 , H02K5/167 , H02K7/09 , H02K21/22 , H02K7/14
CPC分类号： F16C17/08 , F16C25/045 , F16C32/0425 , H02K5/167 , H02K7/09 , F16C2370/12 , H02K21/22
摘要： An apparatus for rotatably journaling a rotor of a spindle motor about a stator comprising a plurality of magnetic bearings for use in a disc drive including an annular ring single-pole magnet which is integral with the spindle permanent magnet of a spindle motor rotor assembly and disposed in opposition to a complementary annular magnet ring attached to the stator assembly of the spindle motor. These magnetic bearings in conjunction with an axial pivot form a radially stable bearing system for maintaining rotor displacement about the stator in conjunction with a conventional axial pivot. The present invention provides for the unique combination of magnetic bearings with other conventional pivots for use in disc drive systems.

9. 发明授权

US5561335A Integrated passive magnetic bearing system and spindle permanent magnet for use in a spindle motor 失效
标题翻译：集成无源磁轴承系统和主轴永磁体，用于主轴电机
公开(公告)号：US5561335A
公开(公告)日：1996-10-01
申请号：US201798
申请日：1994-02-25
申请人： John C. Dunfield , Kamran Oveyssi
发明人： John C. Dunfield , Kamran Oveyssi
IPC分类号： F16C39/06 , H02K5/167 , H02K7/09 , H02K21/22 , H02K7/14
CPC分类号： F16C17/08 , F16C25/045 , F16C32/0425 , H02K5/167 , H02K7/09 , F16C2370/12 , H02K21/22
摘要： An apparatus for rotatably journaling a rotor of a spindle motor about a stator comprising a plurality of magnetic bearings for use in a disc drive including an annular ring single-pole magnet which is integral with the spindle permanent magnet of a spindle motor rotor assembly and disposed in opposition to a complementary annular magnet ring attached to the stator assembly of the spindle motor. These magnetic bearings in conjunction with an axial pivot form a radially stable bearing system for maintaining rotor displacement about the stator in conjunction with a conventional axial pivot. The present invention provides for the unique combination of magnetic bearings with other conventional pivots for use in disc drive systems.
摘要翻译：一种用于将主轴电动机的转子围绕定子可旋转地旋转的装置，包括用于盘驱动器的多个磁性轴承，所述磁盘轴承包括与主轴电机转子组件的主轴永磁体成一体的环形单极磁体，与安装在主轴电动机的定子组件上的互补环形磁环相对。与轴向枢轴结合的这些磁性轴承形成径向稳定的轴承系统，用于与传统的轴向枢轴一起保持转子围绕定子的位移。本发明提供了用于磁盘驱动系统的磁性轴承与其他常规枢轴的独特组合。

10. 发明授权

US5598048A Integrated passive magnetic bearing system and spindle magnet for use in an axial magnet spindle motor 失效
标题翻译：集成无源磁轴承系统和主轴磁铁，用于轴向磁铁主轴电机
公开(公告)号：US5598048A
公开(公告)日：1997-01-28
申请号：US289949
申请日：1994-08-12
申请人： John C. Dunfield , Kamran Oveyssi
发明人： John C. Dunfield , Kamran Oveyssi
IPC分类号： F16C17/08 , F16C39/06 , G11B19/20 , H02K5/167 , H02K7/09 , G11B17/02
CPC分类号： F16C17/08 , F16C25/045 , F16C32/0412 , F16C32/0425 , F16C39/063 , G11B19/2009 , H02K7/09 , F16C2370/12 , H02K5/167
摘要： An apparatus for rotatably journaling a rotor of a flat spindle motor about a stator comprising a spindle magnet disc disposed on the rotor assembly of the flat spindle motor and journaled about the spindle motor shaft having a disc shaped first magnetized region with an outer radius r comprised of a plurality of axial aligned poles, a disc shaped second region having an outer radius r2 (where r2>r) comprised of a single pole, and a disc shaped non-magnetized spacer region disposed there between. The integrated spindle magnet disc is disposed on the inside surface of a rotor over complementary axially aligned electromagnet poles which are disposed on the base of the stator assembly. A like aligned single pole is fixedly attached to the stator and disposed in opposition to the second magnetized region having like aligned pole of the integrated spindle permanent magnet. The single poles are disposed on both the rotor and stator in attraction mode with opposite poles facing one another, or in opposition mode with a complete or partial offset thereby forming a stable magnetic bearing for maintaining rotor displacement about the stator in conjunction with a conventional pivot. The stator base assembly is extended toward the first magnetized region to provide axial pre-load for the motor. The electromagnet poles further include a steel bobbin for increased flux density and added axial stiffness. Finally, eddy current generation means are disposed between the stator base and the like aligned single pole for improved dampening characteristics.
摘要翻译：一种用于将扁平主轴电动机的转子旋转地定位在定子上的装置，包括设置在扁平主轴电动机的转子组件上的主轴磁盘，并围绕具有外半径r的盘形第一磁化区域的主轴电机轴轴颈包围的多个轴向对准的极，具有由单个极组成的外半径r2（其中r2> r）的盘形第二区域和设置在其间的盘形非磁化间隔区域。集成主轴磁体盘设置在转子的内表面上，该互补的轴向对准的电磁体极设置在定子组件的基座上。类似的排列的单极固定地附接到定子并且与具有一体的主轴永久磁铁的相同排列的极的第二磁化区域相对设置。单极以吸引模式设置在转子和定子上，相反的磁极彼此面对，或以相反的方式设置有完全或部分偏移，从而形成稳定的磁轴承，用于与常规枢轴相结合，保持转子位于定子周围。定子基座组件朝向第一磁化区域延伸以为电动机提供轴向预加载。电磁极还包括用于提高磁通密度并增加轴向刚度的钢骨架。最后，涡流产生装置设置在定子基座和类似的对准的单极之间，以改善阻尼特性。

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