-
公开(公告)号：US20240321322A1
公开(公告)日：2024-09-26
申请号：US18244671
申请日：2023-09-11
发明人： Yuki KAWAMITSU
CPC分类号： G11B33/128 , G11B19/2009 , G11B33/126 , G11B2220/2516
摘要： A disk device according to one embodiment includes magnetic disks, a spindle motor, a housing, a first board, and a first connector. The magnetic disks are arranged in an axial direction. The spindle motor rotates the magnetic disks about a first rotation axis. The magnetic disks and the spindle motor are accommodated in an inner space in the housing. The housing includes a first wall having the spindle motor attached thereto, and a second wall protruding from the first wall to surround the inner space. The first board is attached to an outer surface of the second wall. The first connector is attached to the first board and is connected to an external device. Each of the magnetic disks has a diameter of 80 mm or more and 100 mm or less. The housing has a maximum dimension of 26.2 mm or more in the axial direction.
-
公开(公告)号：US20240265944A1
公开(公告)日：2024-08-08
申请号：US18407706
申请日：2024-01-09
IPC分类号： G11B19/20
CPC分类号： G11B19/2009
摘要： A hard disk drive includes at least one magnetic disk and a motor assembly. The motor assembly is configured to rotatably support the magnetic disk(s) and circumferentially rotate the magnetic disk(s) about an axis of rotation during operations of the hard disk drive. The motor assembly includes at least one rotational balancing spring pin. Each rotational balancing spring pin is configured to reduce a rotating unbalance of the motor assembly.
-
公开(公告)号：US11978482B2
公开(公告)日：2024-05-07
申请号：US17577300
申请日：2022-01-17
发明人： Brian Johnson , Jaesoo Byoun , Gaku Ikedo , Hideaki Ito , Naoyuki Kagami
CPC分类号： G11B19/2063 , G11B19/22 , G11B19/26
摘要： A data storage device has a closed loop extended park mode during spin down operation. A data storage device comprises a spindle motor configured to rotate one or more disks, and one or more processing devices. The one or more processing devices are configured to determine a value of current that is discharged from the spindle motor over time during a spin down of the spindle motor, and control a braking duty cycle for braking the spindle motor during the spin down such that the value of current discharged from the spindle motor over time does not exceed a selected current limit.
-
公开(公告)号：US11978481B2
公开(公告)日：2024-05-07
申请号：US18136958
申请日：2023-04-20
申请人： Nidec Corporation
发明人： Naoyuki Kimura , Kazuhiro Sato , Tomoki Uchibori
CPC分类号： G11B19/2036 , F16C33/107 , F16C17/026 , F16C17/107 , F16C2370/12
摘要： A motor includes a shaft, a base portion, a stator, and a rotor. The shaft extends along a central axis extending in an axial direction. The base portion extends in a radial direction on one axial direction side of the shaft. The stator is located in another axial direction with respect to the base portion and surrounds the shaft. The rotor is rotatable around the central axis. The rotor includes a rotor tube portion, a magnet, and a rotor flange portion. The rotor tube portion surrounds the stator. The magnet is opposed to the stator in the radial direction. The rotor flange portion extends in a radially outer direction from one axial end portion of the rotor tube portion. The rotor tube portion includes a yoke tube portion and a hub tube portion. The yoke tube portion is located on a radially inside surface of the hub tube portion.
-
公开(公告)号：US20240112699A1
公开(公告)日：2024-04-04
申请号：US18184567
申请日：2023-03-15
发明人： Takuji Matsuzawa
CPC分类号： G11B19/20 , G11B5/59622
摘要： 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.
-
6.发明公开公开(公告)号：US20240055027A1
公开(公告)日：2024-02-15
申请号：US18483454
申请日：2023-10-09
发明人： Manabu UEHARA , Yuu Kawai
CPC分类号： G11B33/122 , G11B33/1446 , G11B19/2009 , G11B25/043 , G11B33/128 , G11B5/4813
摘要： According to one embodiment, a disk device includes a housing with a bottom wall, magnetic disks supported on a hub of a motor, a printed circuit board provided on an outer surface of the bottom wall, and a wiring board attached on the outer surface of the bottom wall. The bottom wall includes a recess formed in the outer surface, a step located on border between the outer surface and the recess, and through holes opened to the recess. The wiring board includes one end portion disposed in the recess and connection pads on the one end portion, connected to lead wires of a coil. An adhesive is filled into the recess and the through holes, and covers the one end and a solder joint and seals the through holes.
-
公开(公告)号：US11881232B2
公开(公告)日：2024-01-23
申请号：US17840446
申请日：2022-06-14
发明人： Nan-Hsun Han , Brian K. Lee , Danny J. Kastler
IPC分类号： G06F1/00 , G11B19/20 , G06F1/3221 , G11B19/28 , G11B21/02 , G06F1/3203
CPC分类号： G11B19/2054 , G06F1/3221 , G11B19/28 , G11B21/02 , G06F1/3203
摘要： A dual disk spindle motor hard disk drive includes a first portion having a first spindle motor and a first disk media stack mounted thereon and housed in a first enclosure, and a second portion having a coaxial second spindle motor and a second disk media stack mounted thereon and housed in a second enclosure, where the second portion further includes both the first actuator and head sliders corresponding to the first disk stack as well as the second actuator and head sliders corresponding to the second disk stack. The first and second portions are coupled together such that the open sides of the enclosures mate, referred to herein as a clamshell configuration, and each separate spindle motor is configured to operate independently of the other. With independent control of multiple spindle motors, various control functions may be utilized to address power consumption and temperature control.
-
8.发明授权公开(公告)号：US11817132B2
公开(公告)日：2023-11-14
申请号：US17530830
申请日：2021-11-19
发明人： Manabu Uehara , Yuu Kawai
CPC分类号： G11B33/122 , G11B19/2009 , G11B25/043 , G11B33/1446 , G11B5/4813 , G11B33/0472 , G11B33/126 , G11B33/128
摘要： According to one embodiment, a disk device includes a housing with a bottom wall, magnetic disks supported on a hub of a motor, a printed circuit board provided on an outer surface of the bottom wall, and a wiring board attached on the outer surface of the bottom wall. The bottom wall includes a recess formed in the outer surface, a step located on border between the outer surface and the recess, and through holes opened to the recess. The wiring board includes one end portion disposed in the recess and connection pads on the one end portion, connected to lead wires of a coil. An adhesive is filled into the recess and the through holes, and covers the one end and a solder joint and seals the through holes.
-
公开(公告)号：US20230352050A1
公开(公告)日：2023-11-02
申请号：US18300806
申请日：2023-04-14
发明人： Ezio Galbiati , Maurizio Ricci
IPC分类号： G11B19/20
CPC分类号： G11B19/2072
摘要： A method includes coupling an electric motor in a hard disk drive to a set of driver circuits. Each driver circuit includes a high-side switch and a low-side switch. The high-side switch has a high-side current flow path between a supply node coupled to a supply voltage and a switching node coupled to a winding of the electric motor. The low-side switch has a low-side current flow path between the switching node and ground. Respective conduction currents are generated through the low-side current flow paths, in response to a command to reduce the motor speed by coupling a drive voltage to the control terminals of the low-side switches. An intensity of at least one of the respective conduction currents is sensed. In response to the sensed current intensity exceeding a current intensity threshold, the control terminals of the low-side switches are coupled to respective ones of the switching nodes.
-
公开(公告)号：US11670336B2
公开(公告)日：2023-06-06
申请号：US17065991
申请日：2020-10-08
发明人： Aravind Pitty , Xiong Liu
CPC分类号： G11B19/2009 , F16C32/0431 , H02K7/09 , F16C2370/12 , F16C2380/00
摘要： A hard disk drive includes a base deck that is coupled to a cover, a motor assembly that is coupled to the base deck, and magnetic recording media that is coupled to the motor assembly. The motor assembly includes a magnetic bearing with a horizontal magnetic bearing component and a vertical magnetic bearing component.
-
-
-
-
-
-
-
-
-
搜索结果
2850 条记录 (耗时 0.023 秒)
