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    Magnetic disk drive and method of setting a notch filter of the drive
    1.
    发明授权
    Magnetic disk drive and method of setting a notch filter of the drive 有权

    公开(公告)号：US11990153B2

    公开(公告)日：2024-05-21

    申请号：US18184567

    申请日：2023-03-15

    Applicant: KABUSHIKI KAISHA TOSHIBA ,  TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION

    Inventor： Takuji Matsuzawa

    IPC: G11B20/10 ,  G11B5/596 ,  G11B19/20

    CPC classification number: G11B19/20 ,  G11B5/59622

    Abstract: According to one embodiment, a magnetic disk drive includes a notch filter, a parameter storage unit and a computation unit, when the sampling period changes from a first sampling period to a second sampling period, the computation unit computes a damping ratio parameter related to the damping ratio in a second set of parameters at the second sampling period, based on a first absolute value at a first angular frequency of a first transfer function computed from a first set of parameters at the first sampling period and a second absolute value at the first angular frequency of a second transfer function computed from the first set of parameters at the second sampling period, and the notch filter is set with the second set of parameters at the second sampling period is computed.

    Magnetic disk device and filter coefficient setting method of the magnetic disk device
    2.
    发明授权
    Magnetic disk device and filter coefficient setting method of the magnetic disk device 有权

    公开(公告)号：US11804244B2

    公开(公告)日：2023-10-31

    申请号：US17395828

    申请日：2021-08-06

    Applicant: KABUSHIKI KAISHA TOSHIBA ,  TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION

    Inventor： Takuji Matsuzawa

    IPC: G11B19/20

    CPC classification number: G11B19/20

    Abstract: According to one embodiment, a magnetic disk device includes a controlled object, a controller which controls a motion of the controlled object, and loop shaping filters each connected in parallel to the controller. During a determination of coefficients of the loop shaping filters using a transfer function from outputs of the loop shaping filters to before an input of a disturbance affecting the controlled object, the first set of coefficients of each the loop shaping filter is determined by reflecting a frequency response of the other loop shaping filters, and the determined first sets of coefficients of the loop shaping filters are set to the loop shaping filters, respectively.

    Method of manufacturing fluid bearing apparatus and spindle motor including press working a cylindrical inner surface provided with a plating layer
    6.
    发明授权
    Method of manufacturing fluid bearing apparatus and spindle motor including press working a cylindrical inner surface provided with a plating layer 有权
    制造流体轴承装置和主轴电动机的方法包括压制加工具有镀层的圆柱形内表面

    公开(公告)号：US09595290B2

    公开(公告)日：2017-03-14

    申请号：US14690583

    申请日：2015-04-20

    Applicant: Nidec Corporation

    Inventor： Yoichi Sekii ,  Asami Ito

    IPC: G11B19/20 ,  F16C17/10 ,  H02K7/08

    CPC classification number: G11B19/2036 ,  F16C17/102 ,  G11B19/20 ,  H02K7/088

    Abstract: A method of manufacturing a fluid bearing apparatus includes plating a metallic base material including a cylindrical base material inner circumferential surface, and pressing by bringing a contact portion of a pressing member into contact with a plating layer on the base material inner circumferential surface in the plating step. At least a portion of the pressing member including the contact portion has a Young's modulus equal to or greater than a Young's modulus of the base material. In the pressing step a surface of the plating layer is smoothened without causing a plastic deformation of the base material by bringing the pressing member into contact with the plating layer.

    Abstract translation: 制造流体轴承装置的方法包括：对包括圆筒形基材内周面的金属基材进行电镀，并且通过使按压部件的接触部分与电镀基材内周面上的镀层接触来进行加压 步。 包括接触部分的按压构件的至少一部分具有等于或大于基材的杨氏模量的杨氏模量。 在压制步骤中，通过使按压部件与镀层接触，镀层的表面平滑化而不引起基材的塑性变形。

    ASYMMETRICAL DRIVER
    7.
    发明申请
    ASYMMETRICAL DRIVER 审中-公开
    不对称驱动器

    公开(公告)号：US20160189742A1

    公开(公告)日：2016-06-30

    申请号：US15065617

    申请日：2016-03-09

    Applicant: STMicroelectronics, Inc.

    Inventor： Frederic Bonvin

    IPC: G11B19/20 ,  H02M7/5388 ,  H02P6/08

    CPC classification number: H02P3/22 ,  G11B19/20 ,  H02M7/5388 ,  H02P6/085

    Abstract: A drive circuit having asymmetrical drivers. In an embodiment, a brushless DC motor may be driven by a drive circuit having three high-side MOSFETs and three low-side MOSFETs. A driver controller turns the MOSFETs on and off according to a drive algorithm such that phase currents are injected into motor coils to be driven. The high-side MOSFETs may be sized differently than the low-side MOSFETs. As such, when a MacDonald waveform (or similar drive algorithm) is used to drive the phases of the motor, less power may be required during disk spin-up because the MOSFETs that are on more (e.g., the low-side MOSFETs with a MacDonald waveform) may be sized larger than the MOSFETs that are on less (e.g., the high-side MOSFETs). In this manner, less power is dissipated in the larger size MOSFETs that are on more than the others.

    Abstract translation: 具有不对称驱动器的驱动电路。 在一个实施例中，无刷直流电动机可以由具有三个高边MOSFET和三个低边MOSFET的驱动电路驱动。 驱动器控制器根据驱动算法开启和关闭MOSFET，使得相电流被注入要驱动的电机线圈中。 高端MOSFET的尺寸可能与低端MOSFET的尺寸不同。 因此，当MacDonald波形（或类似的驱动算法）用于驱动电动机的相位时，由于更多的MOSFET（例如，具有一个或多个）的低端MOSFET，因此在磁盘启动期间可能需要更少的功率 麦克唐纳波形）的尺寸可能大于较少的MOSFET（例如高边MOSFET）。 以这种方式，在比其他MOSFET更大的MOSFET中消耗更少的功率。

    MEDICAL IMAGE RECORDING/PLAYBACK DEVICE
    8.
    发明申请
    MEDICAL IMAGE RECORDING/PLAYBACK DEVICE 有权
    医学图像记录/回放装置

    公开(公告)号：US20160094789A1

    公开(公告)日：2016-03-31

    申请号：US14891993

    申请日：2014-04-16

    Applicant: Shoichi NAKAMURA ,  ACP JAPAN CO., LTD.

    Inventor： Shoichi NAKAMURA

    IPC: H04N5/232 ,  A61B19/00 ,  G11B19/20 ,  H04N5/91 ,  H04N5/77

    CPC classification number: H04N5/23267 ,  G11B19/20 ,  H04N5/232 ,  H04N5/23241 ,  H04N5/23254 ,  H04N5/23258 ,  H04N5/23264 ,  H04N5/772 ,  H04N5/91 ,  H04N9/8205

    Abstract: A medical image recording/playback device includes an image pickup device. In an image pickup device that generates an image pickup signal by photoelectrically converting light reflected from a subject through an image pickup element, an image pickup control unit displays, on a display unit, image data that is generated for each of frames that constitute a video by processing the image pickup signal, and records the image data on a memory card. When the video is played, an image shift detection unit sequentially compares image data between consecutive or adjacent frames read from the memory card, and detects an amount of positional shift of a main subject between the frames. If the amount of positional shift is greater than or equal to a preset threshold value, displaying of the image data read from the memory card is stopped.

    Abstract translation: 医用图像记录/重放装置包括图像拾取装置。 在通过对从被摄体反射的光进行光电转换通过图像拾取元件产生摄像信号的图像拾取装置中，图像拾取控制单元在显示单元上显示针对构成视频的每个帧生成的图像数据 通过处理图像拾取信号，并将图像数据记录在存储卡上。 当播放视频时，图像偏移检测单元顺序地比较从存储卡读取的连续帧或相邻帧之间的图像数据，并且检测帧之间的主要被摄体的位置偏移量。 如果位置偏移量大于或等于预设阈值，则停止从存储卡读取的图像数据的显示。

    Data storage device optimizing spindle motor power when transitioning into a power failure mode
    9.
    发明授权
    Data storage device optimizing spindle motor power when transitioning into a power failure mode 有权
    数据存储设备在转换到停电模式时优化主轴电机功率

    公开(公告)号：US09230593B1

    公开(公告)日：2016-01-05

    申请号：US14582068

    申请日：2014-12-23

    Applicant: Western Digital Technologies, Inc.

    Inventor： Michael T. Nicholls

    IPC: G11B15/22 ,  G11B19/28

    CPC classification number: G11B19/20 ,  G11B19/2081 ,  G11B21/12

    Abstract: A data storage device is disclosed comprising a spindle motor configured to rotate a disk, wherein the spindle motor comprises a plurality of windings. The windings are commutated based on a commutation sequence while applying a driving voltage to each winding, wherein the 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 reducing the amplitude of the driving voltage to substantially zero and then incrementally increasing the amplitude of the driving voltage by at least two steps toward the operating amplitude.

    Abstract translation: 公开了一种数据存储装置，其包括被配置为旋转盘的主轴马达，其中所述主轴马达包括多个绕组。 绕组根据换向顺序进行换向，同时向每个绕组施加驱动电压，其中驱动电压包括在正常工作期间的工作幅度。 当电源电压低于阈值时，主轴电动机通过至少将驱动电压的幅度降至基本为零，然后将驱动电压的振幅逐渐增加至操作振幅的两个步长，将其配置成发电机 。

    CAMERA ARRAY INCLUDING CAMERA MODULES
    10.
    发明申请
    CAMERA ARRAY INCLUDING CAMERA MODULES 有权
    相机阵列包括相机模块

    公开(公告)号：US20150348580A1

    公开(公告)日：2015-12-03

    申请号：US14726118

    申请日：2015-05-29

    Applicant: Jaunt Inc.

    Inventor： Arthur van Hoff ,  Thomas M. Annau ,  Jens Christensen ,  Koji Gardiner

    IPC: G11B19/20 ,  H04N13/00 ,  H04N5/232 ,  H04N13/02 ,  H04N5/77 ,  H04N5/247

    CPC classification number: G11B19/20 ,  G06Q30/0263 ,  G06T1/0007 ,  G06T3/4038 ,  H04N5/2258 ,  H04N5/23238 ,  H04N5/247 ,  H04N5/772 ,  H04N7/181 ,  H04N13/106 ,  H04N13/111 ,  H04N13/189 ,  H04N13/243 ,  H04N13/271

    Abstract: The disclosure includes a camera array comprising camera modules, the camera modules comprising a master camera that includes a processor, a memory, a sensor, a lens, a status indicator, and a switch, the switch configured to instruct each of the camera modules to initiate a start operation to start recording video data using the lens and the sensor in the other camera modules and the switch configured to instruct each of the camera modules to initiate a stop operation to stop recording, the status indicator configured to indicate a status of at least one of the camera modules. The camera modules of the camera array are configured to provide a 3× field of view overlap.

    Abstract translation: 本发明包括一种包括相机模块的相机阵列，所述相机模块包括包括处理器，存储器，传感器，透镜，状态指示器和开关的主摄像机，所述开关被配置为指示每个相机模块 启动开始操作以使用其他相机模块中的透镜和传感器开始记录视频数据，并且配置为指示每个相机模块开始停止操作以停止记录的开关，该状态指示器被配置为指示在 至少有一个相机模块。 相机阵列的相机模块被配置为提供3×视场重叠。

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