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公开(公告)号：US07692394B2
公开(公告)日：2010-04-06
申请号：US09995206
申请日：2001-11-27
CPC分类号： G11B19/20
摘要： A motor current control method is provided to reduce voltage and current spikes within a spindle motor and a power supply. Subsequently, the amount of current applied to the spindle motor is monitored. In addition, an apparatus for limiting motor power is provided.
摘要翻译： 提供电动机电流控制方法以减少主轴电动机和电源内的电压和电流尖峰。 随后，监测施加到主轴电动机的电流量。 此外，提供了一种用于限制电动机功率的装置。
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公开(公告)号：US6011375A
公开(公告)日：2000-01-04
申请号：US979888
申请日：1997-11-26
IPC分类号： G05B11/28
CPC分类号： G05B11/28
摘要： A disc drive includes an apparatus for limiting coil energization current to a programmable value. A current sensor is operatively coupled to a coil and provides a signal which is indicative of current flow through the coil. A configurable voltage source is responsive to a control signal. A current inhibitor is operatively coupled to the output of the current sensor and the voltage source such that the current inhibitor selectively inhibits current flow through the coil based on results of a comparison between the current sensor signal and a voltage supplied by the configurable voltage source. A method of calibrating a current control threshold is also provided as well as a method of controlling the coil energization current.
摘要翻译： 磁盘驱动器包括用于将线圈通电电流限制到可编程值的装置。 电流传感器可操作地耦合到线圈并提供指示电流通过线圈的信号。 可配置的电压源响应于控制信号。 电流抑制器可操作地耦合到电流传感器和电压源的输出，使得电流抑制器基于电流传感器信号与由可配置电压源提供的电压之间的比较结果，选择性地阻止电流通过线圈流动。 还提供了校准电流控制阈值的方法以及控制线圈通电电流的方法。
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公开(公告)号：US6166503A
公开(公告)日：2000-12-26
申请号：US384461
申请日：1999-08-27
摘要： A disc drive includes an apparatus for limiting coil energization current to a programmable value. A current sensor is operatively coupled to a coil and provides a signal which is indicative of current flow through the coil. A configurable voltage source is responsive to a control signal. A current inhibitor is operatively coupled to the output of the current sensor and the voltage source such that the current inhibitor selectively inhibits current flow through the coil based on results of a comparison between the current sensor signal and a voltage supplied by the configurable voltage source. A method of calibrating a current control threshold is also provided as well as a method of controlling the coil energization current.
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4.发明申请STIOCHIOMETRIC SILICON CARBIDE FIBERS FROM THERMO-CHEMICALLY CURED POLYSILAZANES 有权热固化聚苯乙烯的高分子量碳化硅纤维公开(公告)号：US20120237765A1
公开(公告)日：2012-09-20
申请号：US13401627
申请日：2012-02-21
CPC分类号： C01B31/36 , C01B21/0643 , C01B21/068 , C01B32/956 , C01B35/146 , C04B35/62281 , C04B35/6229 , C04B35/62295 , C04B35/6267 , C04B35/6268 , C04B35/6269 , C04B2235/483 , C04B2235/5252 , C04B2235/5264 , C04B2235/72 , C04B2235/722 , C04B2235/723 , C04B2235/96 , C08G77/62 , C08G79/08 , Y10T428/2918
摘要： A novel polycrystalline stoichiometric fine SiC fiber substantially free of impurities is produced using a novel pre-ceramic polymer. The pre-ceramic polymer is prepared by reacting a mixture of chlorodisilane, boron trichloride, and a vinyl chlorodisilane with an excess of hexamethyldisilazane to form the pre-ceramic polymer resin, which may then be melt-spun, cured, pyrolyzed and heat-treated to obtain the finished SiC fiber. The manufacturing process for the production of the fine SiC ceramic fiber allows for flexibility with respect to cross-linking, in that low-cost thermal treatments may replace more complex methods, while obtaining fibers with improved materials properties as compared to currently available SiC fibers.
摘要翻译： 使用新的预陶瓷聚合物制备基本上不含杂质的新颖的多晶化学计量精细SiC纤维。 通过使氯二硅烷，三氯化硼和乙烯基氯代硅烷的混合物与过量的六甲基二硅氮烷反应来制备预陶瓷聚合物，以形成预陶瓷聚合物树脂，然后将其熔融纺丝，固化，热解和热处理 以获得成品的SiC纤维。 用于生产精细SiC陶瓷纤维的制造方法允许相对于交联的柔性，因为与目前可获得的SiC纤维相比，获得具有改进的材料性质的纤维，低成本热处理可以代替更复杂的方法。
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公开(公告)号：US5452150A
公开(公告)日：1995-09-19
申请号：US266003
申请日：1994-06-27
申请人： Stacy A. Henneberger , Christopher L. Hill , Richard W. Molstad , Alan R. Olson , Steven R. Seeman
发明人： Stacy A. Henneberger , Christopher L. Hill , Richard W. Molstad , Alan R. Olson , Steven R. Seeman
IPC分类号： G11B23/34 , G11B5/008 , G11B15/06 , G11B15/087 , G11B20/12 , G11B23/36 , G11B27/28 , G11B5/09 , G11B15/18
CPC分类号： G11B15/06 , G11B15/087 , G11B20/1205 , G11B23/36 , G11B5/00817
摘要： The tape in a data cartridge has a beginning of tape (BOT) zone adjacent a leading end, a load point (LP) zone adjacent the BOT zone, an end of tape (EOT) zone adjacent a trailing end, an early warning (EW) zone adjacent the EOT zone, and a data recording (DR) zone between the LP and EW zones. Servo tracks extending between the BOT and EOT enable the closed-loop servo operation of a tape deck during the recording of data at data flux transition densities within a predetermined range of flux transition densities. A BOT indicator includes a first type magnetic marker extending throughout the BOT zone and has a BOT flux density. An LP indicator includes spaced second type magnetic markers on the servo tracks at the border of the LP and DR zones. An EW indicator which is identical to the LP indicator is located on the servo tracks at the border of the DR and EW zones. An EOT indicator includes a first type marker extending throughout the EOT zone and has an EOT flux density. Digitally encoded cartridge information indicators including the spaced second type markers are located in each of the BOT and EOT zones. The BOT and EOT flux densities are different from one another, and sufficiently different from the data flux transition densities to enable the BOT and EOT indicators to be distinguished from the data. The second type markers of the LP and EW and cartridge information indicators are sufficiently different from the servo carrier flux density to enable the indicators to be distinguished from the servo carrier.
摘要翻译： 数据盒式磁带中的胶带具有与前端相邻的胶带（BOT）区域，邻近BOT区域的装载点（LP）区域，与尾端相邻的磁带（EOT）区域的末端，预警（EW ）区域，以及LP和EW区域之间的数据记录（DR）区域。 在BOT和EOT之间延伸的伺服轨道能够在磁通量转换密度的预定范围内的数据通量转换密度记录数据期间实现磁带机的闭环伺服操作。 BOT指示器包括延伸穿过BOT区域并具有BOT通量密度的第一类型磁性标记。 LP指示器在LP和DR区域的边界处的伺服轨道上包括间隔开的第二类型的磁标记。 与LP指示灯相同的EW指示器位于DR和EW区域边界的伺服轨道上。 EOT指示器包括延伸穿过EOT区域并具有EOT通量密度的第一类型标记。 包括间隔开的第二类型标记的数字编码的盒信息指示器位于BOT和EOT区中的每一个中。 BOT和EOT通量密度彼此不同，与数据通量转换密度充分不同，使BOT和EOT指标能够与数据区别开来。 LP和EW和墨盒信息指示器的第二种类型标记与伺服载体磁通密度充分不同，以使指示符与伺服载体不同。
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公开(公告)号：US5450257A
公开(公告)日：1995-09-12
申请号：US35783
申请日：1993-03-23
申请人： Hung T. Tran , James S. Anderson , Christopher L. Hill , Durkee B. Richards , Robert J. Youngquist
发明人： Hung T. Tran , James S. Anderson , Christopher L. Hill , Durkee B. Richards , Robert J. Youngquist
CPC分类号： G11B5/5504 , G11B5/56 , G11B5/584
摘要： A head-track orienting system for use in magnetic recording tape drives is disclosed which automatically corrects for misalignment between the head assembly and a recorded servo track on the tape. Using a servo control loop, the system calculates head-track alignment error during operation of the tape drive and either pivots the head assembly or adjusts the tape cartridge to compensate for the error. Transverse head-track positioning mechanisms are also included in the system to locate and maintain a centered position of the heads on the servo track.
摘要翻译： 公开了用于磁记录带驱动器的头轨定向系统，其自动校正磁头组件和磁带上记录的伺服磁道之间的未对准。 使用伺服控制回路，系统在磁带驱动器运行期间计算磁头对准误差，并且可以使磁头组件旋转或调整磁带盒以补偿错误。 系统中还包括横向头轨定位机构，用于定位和保持伺服磁道头部中心位置。
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7.发明授权Stiochiometric silicon carbide fibers from thermo-chemically cured polysilazanes 有权来自热化学固化的聚硅氮烷的化学计量碳化硅纤维公开(公告)号：US09045347B2
公开(公告)日：2015-06-02
申请号：US13037151
申请日：2011-02-28
申请人： Edward J. A. Pope , Christopher L. Hill , Carl N. Brabham , Jerry M. King , Bernard T. Morkunas
发明人： Edward J. A. Pope , Christopher L. Hill , Carl N. Brabham , Jerry M. King , Bernard T. Morkunas
IPC分类号： C01B31/36 , C04B35/626 , C08G77/54 , D01F9/10 , C08G79/08 , C04B35/622 , C01B35/14 , C01B21/068 , C01B21/064 , C08G77/62
CPC分类号： C01B31/36 , C01B21/0643 , C01B21/068 , C01B32/956 , C01B35/146 , C04B35/62281 , C04B35/6229 , C04B35/62295 , C04B35/6267 , C04B35/6268 , C04B35/6269 , C04B2235/483 , C04B2235/5252 , C04B2235/5264 , C04B2235/72 , C04B2235/722 , C04B2235/723 , C04B2235/96 , C08G77/54 , C08G77/62 , C08G79/08 , D01F9/10 , Y10T428/2918
摘要： A novel polycrystalline stoichiometric fine SiC fiber substantially free of impurities is produced using a novel pre-ceramic polymer. The pre-ceramic polymer is prepared by reacting a mixture of chlorodisilane, boron trichloride, and a vinyl chlorodisilane with an excess of hexamethyldisilazane to form the pre-ceramic polymer resin, which may then be melt-spun, cured, pyrolyzed and heat-treated to obtain the finished SiC fiber. The manufacturing process for the production of the fine SiC ceramic fiber allows for flexibility with respect to cross-linking, in that low-cost thermal treatments may replace more complex methods, while obtaining fibers with improved materials properties as compared to currently available SiC fibers.
摘要翻译： 使用新的预陶瓷聚合物制备基本上不含杂质的新颖的多晶化学计量精细SiC纤维。 通过使氯二硅烷，三氯化硼和乙烯基氯代硅烷的混合物与过量的六甲基二硅氮烷反应来制备预陶瓷聚合物，以形成预陶瓷聚合物树脂，然后将其熔融纺丝，固化，热解和热处理 以获得成品的SiC纤维。 用于生产精细SiC陶瓷纤维的制造方法允许相对于交联的柔性，因为与目前可获得的SiC纤维相比，获得具有改进的材料性质的纤维，低成本热处理可以代替更复杂的方法。
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8.发明授权Stoichiometric silicon carbide fibers from thermo-chemically cured polysilazanes 有权来自热化学固化聚硅氮烷的化学计量碳化硅纤维公开(公告)号：US08987402B2
公开(公告)日：2015-03-24
申请号：US13401627
申请日：2012-02-21
IPC分类号： C01B31/36 , C04B35/626 , C08G77/62 , C08G79/08 , C04B35/622 , C01B21/068 , C01B21/064 , C01B35/14
CPC分类号： C01B31/36 , C01B21/0643 , C01B21/068 , C01B32/956 , C01B35/146 , C04B35/62281 , C04B35/6229 , C04B35/62295 , C04B35/6267 , C04B35/6268 , C04B35/6269 , C04B2235/483 , C04B2235/5252 , C04B2235/5264 , C04B2235/72 , C04B2235/722 , C04B2235/723 , C04B2235/96 , C08G77/62 , C08G79/08 , Y10T428/2918
摘要： A novel polycrystalline stoichiometric fine SiC fiber substantially free of impurities is produced using a novel pre-ceramic polymer. The pre-ceramic polymer is prepared by reacting a mixture of chlorodisilane, boron trichloride, and a vinyl chlorodisilane with an excess of hexamethyldisilazane to form the pre-ceramic polymer resin, which may then be melt-spun, cured, pyrolyzed and heat-treated to obtain the finished SiC fiber. The manufacturing process for the production of the fine SiC ceramic fiber allows for flexibility with respect to cross-linking, in that low-cost thermal treatments may replace more complex methods, while obtaining fibers with improved materials properties as compared to currently available SiC fibers.
摘要翻译： 使用新的预陶瓷聚合物制备基本上不含杂质的新颖的多晶化学计量精细SiC纤维。 通过使氯二硅烷，三氯化硼和乙烯基氯代硅烷的混合物与过量的六甲基二硅氮烷反应来制备预陶瓷聚合物，以形成预陶瓷聚合物树脂，然后将其熔融纺丝，固化，热解和热处理 以获得成品的SiC纤维。 用于生产精细SiC陶瓷纤维的制造方法允许相对于交联的柔性，因为与目前可获得的SiC纤维相比，获得具有改进的材料性质的纤维，低成本热处理可以代替更复杂的方法。
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9.发明申请STIOCHIOMETRIC SILICON CARBIDE FIBERS FROM THERMO-CHEMICALLY CURED POLYSILAZANES 有权热固化聚苯乙烯的高分子量碳化硅纤维公开(公告)号：US20110212329A1
公开(公告)日：2011-09-01
申请号：US13037151
申请日：2011-02-28
IPC分类号： C01B31/36
CPC分类号： C01B31/36 , C01B21/0643 , C01B21/068 , C01B32/956 , C01B35/146 , C04B35/62281 , C04B35/6229 , C04B35/62295 , C04B35/6267 , C04B35/6268 , C04B35/6269 , C04B2235/483 , C04B2235/5252 , C04B2235/5264 , C04B2235/72 , C04B2235/722 , C04B2235/723 , C04B2235/96 , C08G77/54 , C08G77/62 , C08G79/08 , D01F9/10 , Y10T428/2918
摘要： A novel polycrystalline stoichiometric fine SiC fiber substantially free of impurities is produced using a novel pre-ceramic polymer. The pre-ceramic polymer is prepared by reacting a mixture of chlorodisilane, boron trichloride, and a vinyl chlorodisilane with an excess of hexamethyldisilazane to form the pre-ceramic polymer resin, which may then be melt-spun, cured, pyrolyzed and heat-treated to obtain the finished SiC fiber. The manufacturing process for the production of the fine SiC ceramic fiber allows for flexibility with respect to cross-linking, in that low-cost thermal treatments may replace more complex methods, while obtaining fibers with improved materials properties as compared to currently available SiC fibers.
摘要翻译： 使用新的预陶瓷聚合物制备基本上不含杂质的新颖的多晶化学计量精细SiC纤维。 通过使氯二硅烷，三氯化硼和乙烯基氯代硅烷的混合物与过量的六甲基二硅氮烷反应来制备预陶瓷聚合物，以形成预陶瓷聚合物树脂，然后将其熔融纺丝，固化，热解和热处理 以获得成品的SiC纤维。 用于生产精细SiC陶瓷纤维的制造方法允许相对于交联的柔性，因为与目前可获得的SiC纤维相比，获得具有改进的材料性质的纤维，低成本热处理可以代替更复杂的方法。
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10.发明授权公开(公告)号：US06710567B2
公开(公告)日：2004-03-23
申请号：US10028222
申请日：2001-12-21
IPC分类号： G05B1101
CPC分类号： G11B19/20
摘要： Method and apparatus for accelerating a disc drive spindle motor to an operational velocity at which data are transferred between a host device and a disc rotated by the spindle motor. The spindle motor is initially accelerated from rest to an intermediate velocity at which sufficient back electromotive force (bemf) is generated by the rotation of the spindle motor to enable commutation circuitry of the disc drive to time the application of drive pulses to the spindle motor. The spindle motor is subsequently accelerated from the intermediate velocity to the operational velocity by applying a velocity dependent reference profile which establishes a sequence of reference levels to control the flow of current through the spindle motor during acceleration. The sequence of reference levels have different magnitudes at different velocities of the spindle motor between the intermediate velocity and the operational velocity.
摘要翻译： 用于将盘驱动主轴马达加速到数据在主机装置与由主轴马达旋转的盘之间传送的操作速度的方法和装置。 主轴电动机最初从静止状态加速到中间速度，通过主轴电动机的旋转产生足够的反电动势（bemf），以使磁盘驱动器的换向电路能够对主轴电动机施加驱动脉冲。 主轴电动机随后通过施加速度依赖参考曲线从中间速度加速到运行速度，该参考曲线建立了一系列参考水平，以控制加速期间通过主轴电机的电流流动。 在中间速度和操作速度之间，主轴电机的不同速度下，参考电平的顺序具有不同的幅度。
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