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1.发明授权Data storage device controlling amplitude and phase of driving voltage to generate power from a spindle motor 有权数据存储装置控制驱动电压的振幅和相位，以从主轴电机产生电力公开(公告)号：US09355676B1
公开(公告)日：2016-05-31
申请号：US14668949
申请日：2015-03-25
CPC分类号： G11B19/2081 , G11B19/047 , G11B21/12 , H02P3/14 , H02P7/025 , H02P29/0241
摘要： A data storage device is disclosed comprising a disk, a spindle motor configured to rotate the disk, wherein the spindle motor comprises a plurality of windings, and a head actuated over the disk. The windings of the spindle motor are commutated based on a commutation sequence while applying a periodic driving voltage to each winding, wherein the periodic driving voltage comprises an operating amplitude during normal operation. When a supply voltage falls below a threshold, the spindle motor is configured into a power generator by at least adjusting the amplitude and a phase of the periodic driving voltage so that a periodic current flowing through each winding is substantially opposite in phase from a sinusoidal back electromotive force (BEMF) voltage generated by each winding.
摘要翻译： 公开了一种数据存储装置，包括盘，被配置为旋转盘的主轴马达，其中主轴马达包括多个绕组，以及在盘上致动的头。 主轴电动机的绕组基于换向顺序进行换向，同时向每个绕组施加周期性驱动电压，其中周期性驱动电压包括正常操作期间的工作幅度。 当电源电压低于阈值时，主轴电动机通过至少调整周期性驱动电压的幅度和相位而被配置成发电机，使得流过每个绕组的周期性电流与正弦曲线背相比基本上相反 每个绕组产生的电动势（BEMF）电压。
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2.发明授权公开(公告)号：US10116129B1
公开(公告)日：2018-10-30
申请号：US15158541
申请日：2016-05-18
摘要： An EOS event detection circuit coupled to a power supply via a supply voltage rail and comprising a plurality of sub-circuits coupled to the supply voltage rail, each sub-circuit comprising a first transistor, a Zener diode coupled between the supply voltage rail and a first terminal of the first transistor, and a fusible element coupled between a second terminal of the first transistor and the supply voltage rail, wherein the first transistor is configured to cause the fusible element to open when an EOS event occurring on the supply voltage rail exceeds a reverse breakdown voltage of the Zener diode, and wherein the Zener diode in each sub-circuit has a different reverse breakdown voltage.
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3.发明授权公开(公告)号：US09910075B2
公开(公告)日：2018-03-06
申请号：US15095605
申请日：2016-04-11
IPC分类号： G01R13/04 , G01R19/165 , G11C5/14 , G11C16/30 , G11B33/10 , G01R15/14 , G01R15/12 , G01R13/16 , G01R19/00 , G01R31/28
CPC分类号： G01R19/16528 , G01R13/16 , G01R15/12 , G01R15/144 , G01R19/00 , G01R31/2829 , G01R31/40 , G06F1/26 , G06F1/28 , G06F1/30 , G11B33/10 , G11C5/143 , G11C16/30
摘要： An overvoltage detection circuit coupled to an external power supply via a voltage supply line and comprising a transistor comprising first terminal coupled to the voltage supply line, second terminal coupled to the first terminal via a resistor, the second terminal coupled to a parasitic capacitor, the transistor configured to receive an overvoltage spike from the external power supply on the first terminal, and provide an output voltage on third terminal of the transistor to indicate detection of the overvoltage spike when it has a duration less than a time constant based on the resistor and the parasitic capacitor and amplitude that exceeds a threshold voltage of the transistor. The overvoltage detection circuit further comprises a monitor circuit configured to receive the output voltage from the transistor and provide a digital signal providing a notification of the detected overvoltage spike from the external power supply on the voltage supply line.
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4.发明授权Data storage device employing a phase offset to generate power from a spindle motor during a power failure 有权在电源故障期间采用相位偏移从主轴电机产生功率的数据存储装置公开(公告)号：US09343102B1
公开(公告)日：2016-05-17
申请号：US14668940
申请日：2015-03-25
CPC分类号： G11B19/2081 , G11B19/2009 , H02P3/14 , H02P6/182
摘要： A data storage device is disclosed comprising a disk, a spindle motor configured to rotate the disk, wherein the spindle motor comprises a plurality of windings, and a head actuated over the disk. The windings are commutated based on a commutation sequence while applying a periodic driving voltage to each winding, wherein the periodic driving voltage comprises an operating amplitude during normal operation. When a supply voltage falls below a threshold, the spindle motor is configured into a power generator by at least adjusting a phase of the periodic driving voltage by a phase offset and adjusting the amplitude of the periodic driving voltage based on the phase offset.
摘要翻译： 公开了一种数据存储装置，包括盘，被配置为旋转盘的主轴马达，其中主轴马达包括多个绕组，以及在盘上致动的头。 在对每个绕组施加周期性驱动电压的同时，基于换向序列对绕组进行整流，其中周期性驱动电压在正常操作期间包括工作幅度。 当电源电压低于阈值时，主轴电动机通过相位偏移至少调整周期性驱动电压的相位并基于相位偏移来调节周期性驱动电压的幅度来配置成发电机。
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5.发明授权Data storage device adjusting a power loss threshold based on samples of supply voltage 有权数据存储装置根据电源电压的样本调整功率损耗阈值公开(公告)号：US09047932B1
公开(公告)日：2015-06-02
申请号：US14260426
申请日：2014-04-24
CPC分类号： G11B19/047 , G11C5/147 , G11C29/021 , G11C29/44
摘要： A data storage device is disclosed comprising a non-volatile memory. A supply voltage for powering the non-volatile memory is sampled to generate supply voltage samples. A power loss threshold is adjusted based on the supply voltage samples, and a power loss event is detected based on the power loss threshold and the supply voltage, wherein an emergency operation is executed when the power loss event is detected.
摘要翻译： 公开了一种包括非易失性存储器的数据存储设备。 对非易失性存储器供电的电源电压进行采样以产生电源电压采样。 基于电源电压采样来调整功率损失阈值，并且基于功率损耗阈值和电源电压来检测功率损失事件，其中在检测到电力损失事件时执行紧急操作。
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6.发明授权Disk drive employing digital accumulators to limit velocity and/or acceleration of microactuator 有权磁盘驱动器采用数字累加器来限制微型致动器的速度和/或加速度公开(公告)号：US09025273B1
公开(公告)日：2015-05-05
申请号：US14052666
申请日：2013-10-11
IPC分类号： G11B5/54 , G11B21/02 , G11B5/588 , G11B15/473
CPC分类号： G11B15/473 , G11B5/5547 , G11B5/556 , G11B5/588
摘要： A disk drive is disclosed comprising a microactuator configured to actuate a head over a disk, and control circuitry comprising a first digital accumulator responsive to a first register. The first digital accumulator generates at least one of a velocity command and a position command for the microactuator, and the control circuitry configures the first register in order to limit at least one of a velocity and an acceleration of the microactuator.
摘要翻译： 公开了一种磁盘驱动器，其包括被配置为致动磁头上的磁头的微致动器，以及响应于第一寄存器的包括第一数字累加器的控制电路。 第一数字累加器产生用于微致动器的速度命令和位置命令中的至少一个，并且控制电路配置第一寄存器以便限制微致动器的速度和加速度中的至少一个。
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