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1. 发明授权

US09620160B1 Data storage device measuring resonant frequency of a shock sensor by inserting the shock sensor into an oscillator circuit 有权
公开(公告)号：US09620160B1
公开(公告)日：2017-04-11
申请号：US14981844
申请日：2015-12-28
申请人： Western Digital Technologies, Inc.
发明人： Jaesoo Byoun , Timothy A. Ferris
IPC分类号： G11B5/596 , G11B5/09
CPC分类号： G11B5/59694 , G11B19/042
摘要： A data storage device is disclosed comprising a disk, a head, a shock sensor, and an oscillator circuit responsive to the shock sensor and configured to generate an oscillating signal using positive feedback. A resonant frequency of the shock sensor is detected based on the oscillating signal. A physical shock affecting the head actuated over the disk is detected based on a response of the shock sensor to the physical shock and based on the detected resonant frequency of the shock sensor.

2. 发明授权

US09390749B2 Power failure management in disk drives 有权
标题翻译：磁盘驱动器中的电源故障管理
公开(公告)号：US09390749B2
公开(公告)日：2016-07-12
申请号：US14792798
申请日：2015-07-07
申请人： Western Digital Technologies, Inc.
发明人： Timothy A. Ferris , Robert P. Ryan
IPC分类号： G11B19/04 , G11B19/20 , H02P3/14 , H02P25/02
CPC分类号： G11B19/047 , G11B5/54 , G11B19/20 , H02P3/14 , H02P25/028
摘要： A disk drive is disclosed comprising a disk, a spindle motor operable to rotate the disk, a head actuated over the disk, an interface operable to receive a host supply voltage, and a capacitor. The host supply voltage is used to charge the capacitor to a capacitor voltage higher than the host supply voltage. During a power failure, the host supply voltage stops charging the capacitor, and a motor supply voltage is generated from the spindle motor. The capacitor voltage is used to operate control circuitry, and when the capacitor voltage decays below the motor supply voltage, the motor supply voltage charges the capacitor.
摘要翻译：公开了一种磁盘驱动器，其包括盘，可操作以旋转盘的主轴马达，在盘上致动的头，可操作以接收主机电源电压的接口和电容器。主电源电压用于将电容器充电到高于主机电源电压的电容器电压。在电源故障期间，主机电源电压停止对电容器充电，并且主轴电机产生电机电源电压。电容电压用于操作控制电路，当电容电压降到低于电机电源电压时，电机电源电压对电容充电。

3. 发明授权

US08922940B1 Data storage device reducing spindle motor voltage boost during power failure 有权
标题翻译：数据存储设备在停电时减少主轴电机电压提升
公开(公告)号：US08922940B1
公开(公告)日：2014-12-30
申请号：US14287550
申请日：2014-05-27
申请人： Western Digital Technologies, Inc.
发明人： Timothy A. Ferris
IPC分类号： G11B21/02 , G11B5/596 , G11B19/04 , G11B19/28
CPC分类号： G11B19/2081 , G11B21/12
摘要： A data storage device is disclosed comprising a head actuated over a disk, a spindle motor configured to rotate the disk, and control circuitry configured to perform a power fail operation by boosting a power voltage generated based on the spindle motor to generate a boosted voltage, controlling an operation of the data storage device using the boosted voltage, and when the power voltage falls below a threshold, reducing the boosting so as to reduce the boosted voltage.
摘要翻译：公开了一种数据存储装置，包括：盘驱动的磁头，被配置为旋转磁盘的主轴电动机;以及控制电路，其被配置为通过升高基于主轴电动机产生的电力电压来执行电力故障操作，以产生升压电压，使用升压电压控制数据存储装置的动作，当电源电压低于阈值时，减小升压，降低升压电压。

4. 发明授权

US09484733B1 Power control module for data storage device 有权
标题翻译：电源控制模块，用于数据存储设备
公开(公告)号：US09484733B1
公开(公告)日：2016-11-01
申请号：US14146555
申请日：2014-01-02
申请人： Western Digital Technologies, Inc.
发明人： Timothy A. Ferris , John R. Agness
IPC分类号： H02H3/087 , H02H3/20 , H02H5/04
CPC分类号： H02H3/087 , H02H3/202 , H02H5/04
摘要： A power control module including first port for receiving supply voltage from host power supply, second port for providing output voltage to power one or more data storage device components, isolation circuit coupled to first and second ports, driver including output coupled to control terminal of isolation circuit, voltage booster including input for receiving supply voltage and output for providing boost voltage to supply terminal of driver, voltage limiter operable to limit boost voltage to a limited boost voltage, and control circuitry coupled to drive input and operable to cause the isolation circuit to be in closed state during normal operating mode by causing the driver to apply limited boost voltage to the control terminal of the isolation circuit, thereby enabling the isolation circuit to provide over-voltage protection to one or more data storage device components by limiting output voltage at second port to less than the limited boost voltage.
摘要翻译：一种功率控制模块，包括用于从主电源接收电源电压的第一端口，用于向一个或多个数据存储设备组件提供输出电压的第二端口，耦合到第一和第二端口的隔离电路的驱动器，包括耦合到控制端的隔离的输出电路，电压升压器，其包括用于接收电源电压的输入和用于向驱动器的电源端提供升压电压的输出，用于将升压电压限制到限制的升压电压的限压器，以及耦合到驱动输入并可操作以使隔离电路在正常操作模式期间处于关闭状态，通过使驱动器对隔离电路的控制端施加有限的升压电压，从而使得隔离电路能够通过限制一个或多个数据存储设备组件的输出电压来向一个或多个数据存储设备组件提供过电压保护第二端口小于有限的升压电压。

5. 发明授权

US09076473B1 Data storage device detecting fly height instability of head during load operation based on microactuator response 有权
标题翻译：数据存储装置根据微型制动器响应，检测负载运行时头部的飞高不稳定性
公开(公告)号：US09076473B1
公开(公告)日：2015-07-07
申请号：US14457425
申请日：2014-08-12
申请人： Western Digital Technologies, Inc.
发明人： Yanning Liu , Xin Wang , Jianghong Ding , Dean V. Dang , Jong Hyun Lee , Duc T. Phan , Timothy A. Ferris
IPC分类号： G11B21/02 , G11B27/36 , G11B5/60 , G11B5/54
CPC分类号： G11B5/6011 , G11B5/6058 , G11B5/6076
摘要： A data storage device is disclosed comprising a first disk surface, a first head, and a first microactuator configured to actuate the first head over the first disk surface. The first microactuator is configured into a first sensor, and a first load operation is executed to load the first head over the first disk surface. A fly height instability of the first head is detected during the first load operation based on a first sensor signal generated by the first microactuator.
摘要翻译：公开了一种数据存储装置，包括第一盘表面，第一头和第一微致动器，其构造成在第一盘表面上致动第一头。第一微型致动器被配置成第一传感器，并且执行第一加载操作以将第一头部装载在第一盘表面上。基于由第一微致动器产生的第一传感器信号，在第一加载操作期间检测第一头的飞高不稳定性。

6. 发明授权

US09025273B1 Disk drive employing digital accumulators to limit velocity and/or acceleration of microactuator 有权
标题翻译：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
申请人： Western Digital Technologies, Inc.
发明人： Timothy A. Ferris , Joseph J. Crowfoot
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。

7. 发明授权

US08947819B1 Disk drive implementing hysteresis for primary shock detector based on a more sensitive secondary shock detector 有权
标题翻译：基于更敏感的次级冲击检测器的主要震动检测器的磁盘驱动器实现滞后
公开(公告)号：US08947819B1
公开(公告)日：2015-02-03
申请号：US14054738
申请日：2013-10-15
申请人： Western Digital Technologies, Inc.
发明人： Timothy A. Ferris , Alain Chahwan
IPC分类号： G11B27/36 , G11B15/04 , G11B19/04
CPC分类号： G11B19/042 , G11B5/5582 , G11B5/59694
摘要： A disk drive is disclosed comprising a head actuated over a disk, and control circuitry comprising a first shock detector and a second shock detector. A first number of shock events is detected based on the first shock detector, and when the first number of shock events exceeds an upper event threshold, a sensitivity of the first shock detector is decreased. After decreasing the sensitivity of the first shock detector, a second number of shock events is detected based on the second shock detector operating at a higher sensitivity than the first shock detector. When the second number of shock events falls below a lower event threshold, the sensitivity of the first shock detector is increased.
摘要翻译：公开了一种磁盘驱动器，包括在磁盘上致动的磁头，以及包括第一冲击检测器和第二冲击检测器的控制电路。基于第一震动检测器检测到第一数量的冲击事件，并且当第一数量的冲击事件超过上事件阈值时，第一冲击检测器的灵敏度降低。在降低第一震动检测器的灵敏度之后，基于以比第一震动检测器更高的灵敏度操作的第二震动检测器来检测第二数量的冲击事件。当第二数量的冲击事件下降到较低事件阈值以下时，第一震动检测器的灵敏度增加。

8. 发明授权

US10242706B1 Data storage device detecting spindle motor position at increased resolution using mutual inductive sense 有权
公开(公告)号：US10242706B1
公开(公告)日：2019-03-26
申请号：US15965947
申请日：2018-04-29
申请人： Western Digital Technologies, Inc.
发明人： Brian A. Johnson , Timothy A. Ferris , Jaesoo Byoun
IPC分类号： G11B5/09 , G11B19/20 , G11B19/02 , H02P6/185 , H02P6/182
摘要： A data storage device is disclosed comprising a head actuated over a disk, and a spindle motor configured to rotate the disk. A first driving voltage is applied across a first and second windings of the spindle motor connected in series while measuring a first mutual inductance voltage across a third winding, wherein the first driving voltage comprises a first amplitude and a first polarity. A second driving voltage is applied across the first and second winding connected in series while measuring a second mutual inductance voltage across the third winding, wherein the second driving voltage comprises the first amplitude and a second polarity opposite the first polarity. The first measured mutual inductance voltage and the second measured mutual inductance voltage are combined to generate a first mutual inductance signal, and an angular position of the spindle motor is estimated based on the first mutual inductance signal.

9. 发明授权

US09564162B1 Data storage device measuring resonant frequency of a shock sensor by applying differential excitation and measuring oscillation 有权
标题翻译：数据存储设备通过应用差分励磁和测量振荡来测量冲击传感器的谐振频率
公开(公告)号：US09564162B1
公开(公告)日：2017-02-07
申请号：US14981785
申请日：2015-12-28
申请人： Western Digital Technologies, Inc.
发明人： Jaesoo Byoun , Timothy A. Ferris
IPC分类号： G11B7/00 , G11B5/596 , G01H11/08 , G01H13/00
CPC分类号： G11B5/59694 , G01H11/08 , G01H13/00
摘要： A data storage device is disclosed comprising a disk, a head, and a shock sensor comprising a first terminal and a second terminal. A first bias signal is applied signal to the first terminal of the shock sensor and a second bias signal is applied to the second terminal of the shock sensor. An oscillating signal is generated by increasing the first bias signal and decreasing the second bias signal, and a resonant frequency of the shock sensor is detected based on the oscillating signal. A physical shock affecting the head actuated over the disk is detected based on a response of the shock sensor to the physical shock and based on the detected resonant frequency of the shock sensor.
摘要翻译：公开了一种数据存储装置，其包括盘，头和包括第一终端和第二终端的冲击传感器。将第一偏置信号施加到冲击传感器的第一端子，并且将第二偏置信号施加到冲击传感器的第二端子。通过增加第一偏置信号和减小第二偏置信号来产生振荡信号，并且基于振荡信号检测冲击传感器的谐振频率。基于震动传感器对物理冲击的响应并且基于检测到的冲击传感器的共振频率来检测影响在盘上致动的磁头的物理冲击。

10. 发明授权

US09437231B1 Data storage device concurrently controlling and sensing a secondary actuator for actuating a head over a disk 有权
标题翻译：数据存储装置同时控制和感测用于在磁盘上驱动磁头的次致动器
公开(公告)号：US09437231B1
公开(公告)日：2016-09-06
申请号：US14865858
申请日：2015-09-25
申请人： Western Digital Technologies, Inc.
发明人： Timothy A. Ferris , Jaesoo Byoun
IPC分类号： G11B5/55
CPC分类号： G11B5/5565 , G11B5/5526 , G11B5/5552 , G11B5/5582
摘要： A data storage device is disclosed comprising a voice coil motor (VCM) and a secondary actuator configured to actuate a head over a disk. A control signal is applied to the secondary actuator while processing a sensor signal generated by the secondary actuator. A vibration signal is generated based on the sensor signal, wherein the vibration signal is a high-pass signal.
摘要翻译：公开了一种数据存储装置，其包括音圈电机（VCM）和辅助致动器，其被配置为在盘上致动磁头。在处理由次级致动器产生的传感器信号时，控制信号被施加到辅助致动器。基于传感器信号产生振动信号，其中振动信号是高通信号。

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