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41. 发明公开

US20230386513A1 DATA STORAGE DEVICE HAVING DUAL ACTUATORS AND METHOD FOR EMERGENCY POWER OFF RETRACT (EPOR) OF DUAL ACTUATORS 审中-公开
公开(公告)号：US20230386513A1
公开(公告)日：2023-11-30
申请号：US18446637
申请日：2023-08-09
申请人： Western Digital Technologies, Inc.
发明人： Brian Johnson , Jaesoo Byoun , Gaku Ikedo , Hideaki Ito , Naoyuki Kagami , Hiroki Watanabe
IPC分类号： G11B5/55 , G11B5/48
CPC分类号： G11B5/5578 , G11B5/4813 , G11B5/5573
摘要： A data storage device comprises a lead actuator that actuates a first read-write head over a first disk and a support actuator that actuates a second read-write head over a second disk. A spindle motor rotates the first and second disks. In response to an emergency power off (EPO) event, a processing device retracts and parks the actuators using an internal supply voltage generated from a back electromotive force (BEMF) voltage of the spindle motor, and brakes the spindle motor. The spindle motor is not braked until both the lead and support actuators have been retracted and parked.

42. 发明公开

US20230335158A1 SECTOR METRICS TO ESTIMATE HEALTH OF WRITTEN DATA 审中-公开
公开(公告)号：US20230335158A1
公开(公告)日：2023-10-19
申请号：US17723263
申请日：2022-04-18
申请人： Western Digital Technologies, Inc.
发明人： Niranjay Ravindran , Weldon M. Hanson , Hiroyasu Masuda , David T. Flynn , Zarko Popov
IPC分类号： G11B5/55
CPC分类号： G11B5/556 , G11B5/5573 , G11B5/5586
摘要： Various illustrative aspects are directed to a data storage device comprising data tracks N and N−1, and one or more processing devices, configured to identify, during a track write on the data track N, a write abort event based upon an expected risk for the data track N−1 exceeding a risk threshold, read one or more sectors of the data track N−1 and collect one or more corresponding sector metrics, verify the one or more sectors based upon the collected sector metrics, wherein the verifying comprises assigning each of the one or more sectors as one of a readable or a non-readable sector, and continue the track write on the data track N upon determining each of the one or more sectors is a readable sector, or recovering and relocating the data track N−1 based on determining at least one of the sectors is a non-readable sector.

43. 发明授权

US10872629B2 Data storage device coupling/decoupling actuator arm to/from an actuator 有权
公开(公告)号：US10872629B2
公开(公告)日：2020-12-22
申请号：US16750329
申请日：2020-01-23
申请人： Western Digital Technologies, Inc.
发明人： David R. Hall
IPC分类号： G11B5/55 , G11B5/596 , G11B5/48
CPC分类号： G11B5/556 , G11B5/5573 , G11B5/59688 , G11B5/484 , G11B5/4813 , G11B5/4826 , G11B5/5578
摘要： A data storage device is disclosed comprising a first disk surface, a first actuator arm, a first head connected to a distal end of the first actuator arm, an actuator, and a first coupler configured to couple the first actuator arm to the actuator. The first coupler is actuated in order to couple the first actuator arm to the actuator during at least part of a seek interval, and while the first actuator arm is coupled to the actuator, the actuator is moved in order to seek the first head over the first disk surface.

44. 发明授权

US10014027B2 Bimodal modulation 有权
公开(公告)号：US10014027B2
公开(公告)日：2018-07-03
申请号：US15694387
申请日：2017-09-01
申请人： Seagate Technology, LLC
发明人： Vijay Kumar , Narayanan Ramakrishnan
IPC分类号： G11B21/02 , G11B20/10 , G11B5/48 , G11B5/55
CPC分类号： G11B20/10268 , G11B5/4826 , G11B5/483 , G11B5/5552 , G11B5/5573
摘要： Apparatus and method contemplating an in-situ test method for a head gimbal assembly (HGA). The method includes individually exciting a pair of opposing-effect microactuators supporting the read/write head adjacent a data storage media; summing the outputs from the microactuators to derive a spectral frequency response of the HGA; determining a resonant frequency from the spectral frequency response; driving the microactuators at the resonant frequency; and varying the read/write fly height apart from the data storage media to correlate contact with a maximum response of the microactuators.

45. 发明授权

US09754620B2 Bimodal modulation 有权
公开(公告)号：US09754620B2
公开(公告)日：2017-09-05
申请号：US15012571
申请日：2016-02-01
申请人： SEAGATE TECHNOLOGY LLC
发明人： Vijay Kumar , Narayanan Ramakrishnan
IPC分类号： G11B21/02 , G11B20/10 , G11B5/55 , G11B5/48
CPC分类号： G11B20/10268 , G11B5/4826 , G11B5/483 , G11B5/5552 , G11B5/5573
摘要： An apparatus and associated method contemplating a head gimbal assembly (HGA) and a bridge circuit including first and second microactuators attached to the HGA. Computation logic is connected to the bridge circuit and configured to independently measure an electrical output of each microactuator and to sum the electrical outputs to derive a value related to a vertically dominant modulation mode of the HGA.

46. 发明授权

US09502060B2 Semiconductor integrated circuit and operating method for the same 有权
标题翻译：半导体集成电路及其操作方法相同
公开(公告)号：US09502060B2
公开(公告)日：2016-11-22
申请号：US14645314
申请日：2015-03-11
申请人： Renesas Electronics Corporation
发明人： Hideho Koyama , Minoru Kurosawa , Kichiya Itagaki
IPC分类号： G11B5/54 , H02P6/18 , G11B21/12 , G11B5/55
CPC分类号： G11B5/54 , G11B5/5534 , G11B5/5573 , G11B21/12 , H02P6/17 , H02P6/182 , H02P25/034
摘要： The present invention realizes a calibration operation for detecting a motor speed, without employing digital correcting by an external CPU. The calibration operation calculates a comparison reference value corresponding to aback EMF detection signal of a back EMF detector circuit when a zero current flows through a motor and when an arm is fixed. Accordingly, the back EMF detection signal of the back EMF detector circuit is set as the first value and the second value responding to the non-zero current flowing through the motor, and the semiconductor integrated circuit calculates the comparison reference value from the first value and the second value. The difference between the comparison reference value and the comparison input value as the back EMF detection signal of the back EMF detector circuit is reduced by adjusting the gain of an internal amplifier of the back EMF detector circuit by an adjustment unit.
摘要翻译：本发明实现了用于检测电动机速度的校准操作，而不用外部CPU进行数字校正。当零电流流过电动机并且当臂固定时，校准操作计算对应于反电动势检测器电路的紧急EMF检测信号的比较参考值。因此，反电动势检测电路的反电动势检测信号被设定为第一值，第二值响应流过电动机的非零电流，半导体集成电路根据第一值和第二个值。作为反电动势检测电路的反电动势检测信号的比较基准值和比较输入值之间的差通过调整单元调整反电动势检测器电路的内部放大器的增益来减小。

47. 发明申请

US20160180878A1 Arrangement for Rotatably Driving a Round Disk 有权
标题翻译：可旋转驱动圆盘的布置
公开(公告)号：US20160180878A1
公开(公告)日：2016-06-23
申请号：US14907057
申请日：2014-07-21
申请人： ECO-LOGICAL ENTERPRISES B.V.
发明人： Augustinus Wilhelmus Maria Bertels
IPC分类号： G11B19/20
CPC分类号： G11B19/2009 , G11B5/5573 , G11B5/5578
摘要： A device for rotary driving of a round disk, for instance a memory disk of a computer, comprises a stator disposed fixedly relative to a frame and a rotor rotatably drivable relative to the stator.According to the invention the rotor comprises a concentric ring to which the peripheral edge of the disk is connected.The stator has an encircling recess, the form of which corresponds to that of the ring such that the ring fits with clearance into the recess. The rotor is provided with two collars of magnetically active elements in angularly equidistant arrangement, and the stator comprises electromagnets disposed at the same angular distances.The arrangement is such that the rotor and the stator together form an annular induction motor.The rotor is preferably suspended magnetically during operation.
摘要翻译：用于旋转驱动圆盘（例如计算机的存储盘）的装置包括相对于框架固定的定子和相对于定子可转动地驱动的转子。根据本发明，转子包括一个同心环，圆盘的周边边缘连接着同心环。定子具有环形凹部，其形状对应于环的凹槽，使得环与间隙配合到凹部中。转子设置有两个角度等距离布置的磁性有源元件的两个环，定子包括以相同的角距离设置的电磁体。该结构使得转子和定子一起形成环形感应电动机。转子优选在操作过程中磁悬浮。

48. 发明申请

US20150262599A1 SEMICONDUCTOR INTEGRATED CIRCUIT AND OPERATING METHOD FOR THE SAME 有权
标题翻译：半导体集成电路及其工作方法
公开(公告)号：US20150262599A1
公开(公告)日：2015-09-17
申请号：US14645314
申请日：2015-03-11
申请人： Renesas Electronics Corporation
发明人： Hideho KOYAMA , Minoru KUROSAWA , Kichiya ITAGAKI
IPC分类号： G11B5/55 , H02P6/18 , H02P25/02
CPC分类号： G11B5/54 , G11B5/5534 , G11B5/5573 , G11B21/12 , H02P6/17 , H02P6/182 , H02P25/034
摘要： The present invention realizes a calibration operation for detecting a motor speed, without employing digital correcting by an external CPU. The calibration operation calculates a comparison reference value corresponding to aback EMF detection signal of a back EMF detector circuit when a zero current flows through a motor and when an arm is fixed. Accordingly, the back EMF detection signal of the back EMF detector circuit is set as the first value and the second value responding to the non-zero current flowing through the motor, and the semiconductor integrated circuit calculates the comparison reference value from the first value and the second value. The difference between the comparison reference value and the comparison input value as the back EMF detection signal of the back EMF detector circuit is reduced by adjusting the gain of an internal amplifier of the back EMF detector circuit by an adjustment unit.
摘要翻译：本发明实现了用于检测电动机速度的校准操作，而不用外部CPU进行数字校正。当零电流流过电动机并且当臂固定时，校准操作计算对应于反电动势检测器电路的紧急EMF检测信号的比较参考值。因此，反电动势检测电路的反电动势检测信号被设定为第一值，第二值响应流过电动机的非零电流，半导体集成电路根据第一值和第二个值。作为反电动势检测电路的反电动势检测信号的比较基准值和比较输入值之间的差通过调整单元调整反电动势检测器电路的内部放大器的增益来减小。

49. 发明申请

US20140300988A1 Hard Disk Drive Bypass Channel Having A Close-Sided Voice Coil Motor 有权
标题翻译：硬盘驱动器旁路通道具有一个紧密的音圈电机
公开(公告)号：US20140300988A1
公开(公告)日：2014-10-09
申请号：US13858791
申请日：2013-04-08
申请人： HGST NETHERLANDS B.V.
发明人： Hajime Eguchi , Takashi Kouno
IPC分类号： G11B5/596 , G11B5/60
CPC分类号： G11B5/596 , G11B5/5573 , G11B5/6011
摘要： Approaches to improving head positioning accuracy in a hard disk drive, by suppressing airflow disturbances that would otherwise cause unwanted component vibration, include a voice coil motor having a sidewall spanning a gap between the VCM upper yoke and lower yoke. This VCM sidewall also serves as the inner wall of a bypass channel, for diverting airflow away from the actuator arm and associated components.
摘要翻译：通过抑制否则将导致不希望的部件振动的气流干扰，提高硬盘驱动器中的头部定位精度的方法包括具有跨越VCM上部磁轭和下部磁轭之间的间隙的侧壁的音圈电动机。该VCM侧壁还用作旁路通道的内壁，用于将气流从致动器臂和相关部件转向。

50. 发明授权

US08760816B1 Disk drive with a biased actuator latch, and having a first permanent magnet that is larger than a second permanent magnet 有权
标题翻译：具有偏置致动器闩锁的磁盘驱动器，并且具有大于第二永磁体的第一永磁体
公开(公告)号：US08760816B1
公开(公告)日：2014-06-24
申请号：US13860505
申请日：2013-04-10
申请人： Western Digital Technologies, Inc.
发明人： David K. Myers , Daniel T. Nguyen
IPC分类号： G11B5/39
CPC分类号： G11B5/5573 , G11B21/22
摘要： A disk drive includes a disk drive base and a disk rotatably mounted to the disk drive base. First and second permanent magnets are fixed to the disk drive base. An actuator is pivotably mounted to the disk drive base. The actuator defining an actuator pivot axis about which the actuator pivots. The actuator includes an actuator coil disposed between the first and second permanent magnets. An actuator latch is disposed adjacent to the actuator. The actuator latch includes a biasing element that comprises a ferromagnetic material. An overlapping portion of the first permanent magnet overlaps the second permanent magnet as viewed from a viewing direction that is parallel to the actuator pivot axis. A protruding portion of the first permanent magnet does not overlap the second permanent magnet as viewed from the viewing direction.
摘要翻译：磁盘驱动器包括盘驱动器基座和可旋转地安装到盘驱动器基座的盘。第一和第二永磁体被固定到磁盘驱动器基座。致动器可枢转地安装到盘驱动器底座。致动器限定致动器枢轴，致动器枢轴围绕致动器枢轴枢转。致动器包括设置在第一和第二永磁体之间的致动器线圈。致动器闩锁邻近致动器设置。致动器闩锁包括包含铁磁材料的偏置元件。从与致动器枢转轴线平行的观察方向观察，第一永磁体的重叠部分与第二永磁体重叠。当从观察方向观察时，第一永磁体的突出部分不与第二永磁体重叠。

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