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1. 发明授权

US5729404A Disc drive spindle motor with rotor isolation and controlled resistance electrical pathway from disc to ground 失效
标题翻译：光盘驱动主轴电机具有转子隔离和受控电阻从盘到地的电路径
公开(公告)号：US5729404A
公开(公告)日：1998-03-17
申请号：US611285
申请日：1996-03-06
申请人： John C. Dunfield , Klaus Kloeppel , Robert M. Pelstring , Michael Raffetto , Donald J. MacLeod , Frederick F. Kazmierczak , Clifford T. Jue
发明人： John C. Dunfield , Klaus Kloeppel , Robert M. Pelstring , Michael Raffetto , Donald J. MacLeod , Frederick F. Kazmierczak , Clifford T. Jue
IPC分类号： G11B17/02 , G11B19/20 , G11B25/04 , H02K11/00 , G11B33/14
CPC分类号： G11B19/2009 , G11B17/02 , G11B25/043 , H02K11/40
摘要： A disc drive for storing and retrieving data from at least one memory storage disc includes a drive base and a spindle motor. The spindle motor includes a rotor hub, a shaft, a bearing unit. The bearing unit rotatably supports the rotor hub about an axis. A controlled resistance electrical pathway is established from the rotor hub to ground to control disc potential and to prevent excess static charge buildup. In one embodiment, the spindle motor includes structural elements made of a conducting plastic having a controlled resistance to establish a controlled resistance electrical pathway from the rotor hub to ground. In a second embodiment, the shaft of the spindle motor includes a conductive contact button electrically connected to the shaft and operatively coupled with a contact shield electrically grounded by an electrical conductor having a controlled resistance. In another embodiment, the spindle motor includes a rod made of conductive material extending from an electrically grounded contact shield and received within the shaft. An electrical pathway between the shaft and the rod is established by a conducting fluid between the rod and the shaft. Alternatively, the electrical pathway from the shaft to the rod is established by a conducting unit. The conducting unit includes a seal, a magnetic conductive material, and a ferro-fluid. The seal is positioned within the shaft. The magnetic conductive material is coupled to the rod. The ferro-fluid is supported between the seal and the magnetic conductive material.
摘要翻译：用于从至少一个存储盘存储和检索数据的盘驱动器包括驱动基座和主轴马达。主轴电机包括转子毂，轴，轴承单元。轴承单元围绕轴线可旋转地支撑转子毂。从转子毂到地面建立一个受控制的电阻电路，以控制盘电位，并防止过多的静电积累。在一个实施例中，主轴电动机包括由具有受控电阻的导电塑料制成的结构元件，以建立从转子毂到地面的受控电阻电路径。在第二实施例中，主轴电机的轴包括电连接到轴的导电接触按钮，并且与通过具有受控电阻的电导体电接地的接触屏蔽可操作地耦合。在另一个实施例中，主轴电动机包括由导电材料制成的杆，导电材料从电接地触点屏蔽延伸并被接收在轴内。轴和杆之间的电路通过杆和轴之间的导电流体建立。或者，通过导电单元建立从轴到杆的电路径。导电单元包括密封件，导电材料和铁液。密封件位于轴内。磁性导电材料连接到杆上。铁素体被支撑在密封件和导电材料之间。

2. 发明授权

US5485331A High resistivity bearing balls for spindle motor isolation 失效
标题翻译：用于主轴电机隔离的高电阻率轴承滚珠
公开(公告)号：US5485331A
公开(公告)日：1996-01-16
申请号：US129655
申请日：1993-09-30
申请人： John C. Dunfield , Klaus Kloeppel , Robert M. Pelstring , Donald J. Macleod , Michael Raffetto , Frederick F. Kazmierczak
发明人： John C. Dunfield , Klaus Kloeppel , Robert M. Pelstring , Donald J. Macleod , Michael Raffetto , Frederick F. Kazmierczak
IPC分类号： G11B17/02 , G11B19/20 , G11B25/04 , H02K11/00 , G11B33/14
CPC分类号： G11B19/2009 , G11B17/02 , G11B25/043 , H02K11/40
摘要： A disc drive for storing and retrieving data from at least one memory storage disc includes a drive base and a spindle motor. The spindle motor includes a rotor hub, a shaft, a bearing sleeve, and a bearing unit. The bearing unit is operably coupled to the rotor hub and includes an inner race secured to the shaft, an outer race secured to the bearing sleeve, and bearing balls fitted between the inner race and the outer race. The bearing balls rotatably support the rotor hub about an axis. At least one structural element of the spindle motor has a high resistivity so as to electrically isolate the hub from the base. In another embodiment, the drive base has an interface surface for coupling with the spindle motor. The interface surface includes a layer of high resistivity material. In another embodiment, the bearing ball is made of ceramic or ruby material to improve performance characteristics. In yet another embodiment, an insert is inserted between the bearing sleeve and the shaft to improve performance characteristics.
摘要翻译：用于从至少一个存储盘存储和检索数据的盘驱动器包括驱动基座和主轴马达。主轴电动机包括转子毂，轴，轴承套和轴承单元。所述轴承单元可操作地联接到所述转子轮毂并且包括固定到所述轴的内座圈，固定到所述轴承套筒的外座圈和装配在所述内座圈和所述外座圈之间的轴承座。轴承滚珠围绕轴线可旋转地支撑转子毂。主轴电动机的至少一个结构元件具有高电阻率，从而将轮毂与基座电隔离。在另一个实施例中，驱动基座具有用于与主轴电动机连接的接口表面。界面表面包括一层高电阻率的材料。在另一个实施例中，轴承球由陶瓷或红宝石材料制成以改善性能特征。在另一个实施例中，插入件插入到轴承套筒和轴之间以改善性能特征。

3. 发明授权

US5473484A Apparatus for electrically grounding a rotor hub in a disc drive motor 失效
标题翻译：用于将盘驱动电动机中的转子轮毂电接地的装置
公开(公告)号：US5473484A
公开(公告)日：1995-12-05
申请号：US253401
申请日：1994-06-03
申请人： John C. Dunfield , Robert M. Pelstring
发明人： John C. Dunfield , Robert M. Pelstring
IPC分类号： G11B19/20 , G11B23/50 , G11B25/04 , G11B33/14 , G11B17/02
CPC分类号： G11B25/043 , G11B19/2009 , G11B23/505 , G11B33/1493
摘要： A disc drive includes a disc drive motor for rotating a storage disc. The motor includes a motor base having a fixed member. A rotor is rotatably coupled to the fixed member and carries the storage disc. First and second bearings are positioned between the rotor and the fixed member allowing rotation of the rotor about the fixed member. A permanent magnet is positioned between the first and second bearings. A conductive fluid between the rotor and the fixed member is maintained in operable contact with the rotor and the fixed member by the permanent magnet. The ferrofluid provides a low resistance electrical path between the rotor and the fixed member thereby electrically grounding the rotor to the motor base.
摘要翻译：盘驱动器包括用于旋转存储盘的盘驱动马达。马达包括具有固定构件的马达基座。转子可旋转地联接到固定构件并承载存储盘。第一和第二轴承位于转子和固定构件之间，允许转子围绕固定构件旋转。永磁体位于第一和第二轴承之间。转子和固定构件之间的导电流体通过永久磁铁保持与转子和固定构件可操作地接触。铁磁流体在转子和固定部件之间提供低电阻的电气路径，从而将转子电动接地到电动机基座。

4. 发明授权

US5548458A Support flange having electrical contacts to provide electrical continuity upon spindle motor mounting to base 失效
标题翻译：支撑法兰具有电触点，以在主轴电机安装到基座上提供电连续性
公开(公告)号：US5548458A
公开(公告)日：1996-08-20
申请号：US238638
申请日：1994-05-04
申请人： Robert M. Pelstring , Klaus D. Kloeppel , John C. Dunfield , Michael K. Andrews , Clifford T. Jue
发明人： Robert M. Pelstring , Klaus D. Kloeppel , John C. Dunfield , Michael K. Andrews , Clifford T. Jue
IPC分类号： G11B19/20 , G11B25/04 , G11B33/12 , H02K3/52 , H02K5/173 , H02K5/22 , G11B17/02
CPC分类号： G11B33/121 , G11B19/2009 , G11B25/043 , G11B33/122 , H02K11/40 , H02K3/522 , H02K5/1735 , H02K5/225 , H02K2203/03 , H02K2211/03
摘要： Spindle motor electrical- and motor-to-base interfaces. A compliant connector along with a circuit on a support flange is provided below a stator assembly for providing: An insertable spindle motor to drive base with less specific orientation. The support flange may comprise a small printed circuit cable or a printed circuit board. Additionally, non-specific orientation of a spindle motor to drive base assembly is described using circular traces oriented about a support flange. A circular connector is also described, as well as a biased support flange.
摘要翻译：主轴电机电动和电机到基座接口。在定子组件的下方提供了兼容的连接器以及在支撑凸缘上的电路，用于提供：可插入的主轴电机以较不特定的取向来驱动基座。支撑凸缘可以包括小的印刷电路电缆或印刷电路板。此外，使用围绕支撑凸缘定向的圆形轨迹来描述主轴电动机用于驱动基座组件的非特定取向。还描述了圆形连接器，以及偏置的支撑凸缘。

5. 发明授权

US5454724A Floating electrical contact for spindle motor 失效
标题翻译：主轴电机浮动电气接点
公开(公告)号：US5454724A
公开(公告)日：1995-10-03
申请号：US279497
申请日：1994-07-22
申请人： Klaus Kloeppel , Robert M. Pelstring , John C. Dunfield
发明人： Klaus Kloeppel , Robert M. Pelstring , John C. Dunfield
IPC分类号： G11B19/20 , G11B33/12 , H01R39/64 , H02K5/16 , H02K11/00 , H01R39/00
CPC分类号： F16C41/002 , F16C19/52 , F16C33/6633 , F16C33/723 , G11B19/2009 , G11B33/122 , H01R39/64 , H02K11/40 , F16C2370/12 , F16C2380/26 , H02K5/16
摘要： Method and apparatus for providing a controlled resistance electrical path from one moving element of an electrical device to second or subsequent element. An electrically conductive media is introduced between the rotating and static element of an electrical device. The media, e.g. conductive grease, may be introduced into the bearings of the device. Alternatively, a housing may be disposed upon one of the elements. Into this housing is introduced a quantity of electrically conductive media and a contact element. The contact element is integral with, or is preloaded against, one end of the shaft of the second element, thereby forming an electrical path from the shaft, through the media to the housing and thence to the first element of the device. The contact element may be seen therefore to be floating in contact with the conductive media, thereby forming a controlled-resistance rotary electrical connector. Physical contact between the contact element and the housing may be implemented or not, as the particular application requires. This rotary connection methodology is especially applicable to the controlled grounding of the rotor of a disc drive electric motor with respect to the stator thereof.
摘要翻译：用于提供从电气设备的一个移动元件到第二个或后续元件的受控电阻电通路的方法和设备。在电气设备的旋转和静止元件之间引入导电介质。媒体，例如导电油脂，可引入装置的轴承。或者，壳体可以设置在其中一个元件上。引入一定数量的导电介质和接触元件。接触元件与第二元件的轴的一端成一体或预先装载，从而形成从轴，通过介质到壳体，从而形成到设备的第一元件的电路径。因此可以看到接触元件浮动与导电介质接触，从而形成受控电阻的旋转电连接器。接触元件和外壳之间的物理接触可以根据具体的应用需要来实现或不实现。该旋转连接方法特别适用于盘式驱动电动机的转子相对于其定子的受控接地。

6. 发明授权

US5844748A Disc drive spindle motor with controlled resistance pathway from disc to ground 失效
标题翻译：光盘驱动主轴电机具有从盘到地的受阻电阻通路
公开(公告)号：US5844748A
公开(公告)日：1998-12-01
申请号：US719589
申请日：1996-09-25
申请人： John C. Dunfield , Klaus Kloeppel , Robert M. Pelstring , Michael Raffetto , Donald J. MacLeod , Frederick F. Kazmierczak , Clifford T. Jue
发明人： John C. Dunfield , Klaus Kloeppel , Robert M. Pelstring , Michael Raffetto , Donald J. MacLeod , Frederick F. Kazmierczak , Clifford T. Jue
IPC分类号： G11B17/02 , G11B19/20 , G11B25/04 , H02K11/00 , G11B33/14
CPC分类号： G11B19/2009 , G11B17/02 , G11B25/043 , H02K11/40
摘要： A disc drive for storing and retrieving data from at least one memory storage disc includes a drive base and a spindle motor. The spindle motor includes a rotor hub, a shaft, a bearing unit. The bearing unit rotatably supports the rotor hub about an axis. A controlled resistance electrical pathway is established from the rotor hub to ground to control disc potential and to prevent excess static charge buildup. In one embodiment, the spindle motor includes structural elements made of a conducting plastic having a controlled resistance to establish a controlled resistance electrical pathway from the rotor hub to ground. In a second embodiment, the shaft of the spindle motor includes a conductive contact button electrically connected to the shaft and operatively coupled with a contact shield electrically grounded by an electrical conductor having a controlled resistance. In another embodiment, the spindle motor includes a rod made of conductive material extending from an electrically grounded contact shield and received within the shaft. An electrical pathway between the shaft and the rod is established by a conducting fluid between the rod and the shaft. Alternatively, the electrical pathway from the shaft to the rod is established by a conducting unit. The conducting unit includes a seal, a magnetic conductive material, and a ferro-fluid. The seal is positioned within the shaft. The magnetic conductive material is coupled to the rod. The ferro-fluid is supported between the seal and the magnetic conductive material.
摘要翻译：用于从至少一个存储盘存储和检索数据的盘驱动器包括驱动基座和主轴马达。主轴电机包括转子毂，轴，轴承单元。轴承单元围绕轴线可旋转地支撑转子毂。从转子毂到地面建立一个受控制的电阻电路，以控制盘电位，并防止过多的静电积累。在一个实施例中，主轴电动机包括由具有受控电阻的导电塑料制成的结构元件，以建立从转子毂到地面的受控电阻电路径。在第二实施例中，主轴电机的轴包括电连接到轴的导电接触按钮，并且与通过具有受控电阻的电导体电接地的接触屏蔽可操作地耦合。在另一个实施例中，主轴电动机包括由导电材料制成的杆，导电材料从电接地触点屏蔽延伸并被接收在轴内。轴和杆之间的电路通过杆和轴之间的导电流体建立。或者，通过导电单元建立从轴到杆的电路径。导电单元包括密封件，导电材料和铁液。密封件位于轴内。磁性导电材料连接到杆上。铁素体被支撑在密封件和导电材料之间。

7. 发明授权

US5659215A Small form factor actuator for improved functionality and linearity 失效
标题翻译：小尺寸促动器，用于改进功能和线性度
公开(公告)号：US5659215A
公开(公告)日：1997-08-19
申请号：US486391
申请日：1995-06-07
申请人： John C. Dunfield , Gunter K. Heine
发明人： John C. Dunfield , Gunter K. Heine
IPC分类号： G11B5/55 , H02K41/035 , H02K33/18
CPC分类号： G11B5/5521 , H02K41/0358
摘要： A voice coil motor (VCM) for a small form factor hard disk drive having a contoured flux field in the air gap wherein adjoining regions of oppositely directed magnetic flux form a transition zone. In the preferred embodiment, the magnetic structure assembly is contoured or shaped. The magnetic structure assembly comprises pole pieces and magnets. The shaping may be of either of the pole pieces or of either of the magnets. The shaping may be along the top edge only, along the bottom edge only, or along both edges. Alternatively, the shaping may be accomplished in the transverse plane, that is by shaping the profile in thickness. The shaping can be done so that when the flux is falling in one gap it is rising in the other gap. In this manner, the sum of the flux in the two gaps remains the same.
摘要翻译：一种用于小尺寸硬盘驱动器的音圈电机（VCM），其在气隙中具有轮廓通量场，其中相对定向磁通量的相邻区域形成过渡区。在优选实施例中，磁性结构组件成形或成形。磁性结构组件包括极片和磁体。成形可以是极片或任一个磁体中的任一个。成型可以仅沿着顶部边缘，仅沿着底部边缘，或沿着两个边缘。或者，可以在横向平面中完成成形，即通过使型材厚度成形。可以进行成形，使得当通量落在一个间隙中时，其在另一间隙中上升。以这种方式，两个间隙中的通量的总和保持相同。

8. 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。

9. 发明授权

US5600511A Particle containment and fluid retention with barrier seal in magnetic disc drive 失效
标题翻译：在磁盘驱动器中具有阻挡密封的颗粒容纳和流体保留
公开(公告)号：US5600511A
公开(公告)日：1997-02-04
申请号：US386882
申请日：1995-02-10
申请人： John C. Dunfield , Gunter K. Heine
发明人： John C. Dunfield , Gunter K. Heine
IPC分类号： G11B25/04 , G11B33/14 , G11B17/02
CPC分类号： G11B33/1473 , G11B25/043
摘要： A disc drive includes a disc drive motor for rotating a magnetic storage disc. The disc drive includes a sealed disc drive chassis which provides a substantially contaminant-free cavity. A fixed member is coupled to the disc drive chassis and a rotor is rotatably about the fixed member for carrying a magnetic storage disc in the contaminant-free cavity. A bearing assembly between the rotor and fixed member allows rotation of the rotor relative to the fixed member. A gap defined between the rotor and the fixed member separates the bearing assembly from the contaminant-free environment and the magnetic storage disc. A barrier material in the gap has a characteristic which reduces contaminant flow thereby. The barrier material tends to prevent liquid and particulate contaminants from escaping from the drive motor and entering the sealed cavity.
摘要翻译：盘驱动器包括用于旋转磁存储盘的盘驱动马达。盘驱动器包括密封的盘驱动器底架，其提供基本上无污染的空腔。固定构件联接到盘驱动器底座，并且转子围绕固定构件可旋转，用于将磁存储盘携带在无污染物空腔中。转子和固定构件之间的轴承组件允许转子相对于固定构件旋转。限定在转子和固定构件之间的间隙将轴承组件与无污染环境和磁存储盘分离。间隙中的阻隔材料具有由此降低污染物流动的特性。阻挡材料倾向于防止液体和微粒污染物从驱动马达中逸出并进入密封腔。

10. 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。

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