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1. 发明授权

US06876114B2 Apparatus for reducing spindle motor magnetic drag 有权
标题翻译：减少主轴电机磁阻的装置
公开(公告)号：US06876114B2
公开(公告)日：2005-04-05
申请号：US09896367
申请日：2001-06-28
申请人： Ralph James Knotts , Garry Edward Korbel
发明人： Ralph James Knotts , Garry Edward Korbel
IPC分类号： H02K1/27 , H02K11/00 , H02K21/22 , H02K1/00 , G11B17/02
CPC分类号： H02K21/22 , H02K1/2786 , H02K11/01
摘要： A magnetic flux shield extending substantially the entire width of a magnetic disk drive spindle motor magnet is mounted between the magnet and the disk drive's base frame and rotates with the magnet. The flux shield is formed of a magnetic material to capture any stray magnetic flux from the motor magnet that may produce power draining eddy currents in the base frame.
摘要翻译：基本上在磁盘驱动主轴电动机磁体的整个宽度上延伸的磁通屏蔽件安装在磁体和磁盘驱动器的基座之间，并与磁体一起旋转。磁通屏蔽由磁性材料形成以捕获来自电动机磁体的任何杂散磁通，其可能在基架中产生功率消耗涡流。

2. 发明授权

US6028411A Circuit and method for modulating the commutation frequency of a disc drive motor 失效
标题翻译：用于调制盘驱动电动机的换向频率的电路和方法
公开(公告)号：US6028411A
公开(公告)日：2000-02-22
申请号：US864509
申请日：1997-05-28
申请人： Andrew Robert Motzko , Garry Edward Korbel
发明人： Andrew Robert Motzko , Garry Edward Korbel
IPC分类号： G11B19/28 , H02P6/00 , G05B1/02
CPC分类号： G11B19/28 , H02P6/34
摘要： A motor control circuit controls a motor in a disc drive. The motor control circuit includes a voltage controlled oscillator (VCO) providing a commutation timing signal. A commutation circuit is operably coupled to the VCO and provides commutation signals to the motor based on the commutation timing signal. A phase locked feedback circuit is operably coupled to the commutation circuit and provides a feedback signal to the VCO based on a sensed commutation phase to control a frequency of the commutation timing signal. A modulator is operably coupled to the phase locked feedback circuit and modulates the feedback signal. A method is also provided in which the commutation timing signal is modulated so as to spread a frequency spectrum of the commutation signals.
摘要翻译：电动机控制电路控制盘驱动器中的电动机。电动机控制电路包括提供换向定时信号的压控振荡器（VCO）。换向电路可操作地耦合到VCO并且基于换向定时信号向马达提供换向信号。锁相反馈电路可操作地耦合到换向电路，并且基于感测到的换向相位向VCO提供反馈信号以控制换向定时信号的频率。调制器可操作地耦合到锁相反馈电路并且调制反馈信号。还提供了一种方法，其中调整换向定时信号以扩展换向信号的频谱。

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