公开(公告)号：EP2321731A1

公开(公告)日：2011-05-18

申请号：EP09812385.4

申请日：2009-09-08

Applicant: Doug Carson & Associates, Inc.

Inventor： CARSON, Douglas, M.

IPC: G06F13/00

CPC classification number: G11B5/5547 ,  G11B7/08576 ,  G11B7/08582 ,  G11B7/26 ,  G11B7/261

Abstract: Method (260) and apparatus (110, 220) for compensating for differences in translation path geometries of transducers (1 12) used to access a data storage medium (100). A compensation profile is generated in relation to radial error between a first translation path geometry (134, 152) of a first transducer and a different, second translation path geometry (144, 154) of a second transducer. A control circuit (116, 170, 200) directs the first transducer to write data to a rotatable data storage medium in relation to the compensation profile to emulate the second translation path geometry. In some embodiments, the control circuit comprises a data signal clock generator ( 172), a motor rotation clock generator ( 174), and a transducer radial translation clock generator (176). A nearest pulse detector (202) identifies a closest clock signal pulse to a once-per-revolution (OPR) rotational reference (182), and the control circuit adjusts a frequency of the associated clock signal coincident with said closest pulse.

公开(公告)号：EP2237405A1

公开(公告)日：2010-10-06

申请号：EP10158288.0

申请日：2010-03-30

Applicant: STMicroelectronics S.r.l.

Inventor： Galbiati, Ezio ,  Peritore, Roberto ,  Bartolini, Michele ,  Mirabelli, Agostino

IPC: H02P6/08 ,  H02P6/22 ,  G11B5/55 ,  G11B5/596 ,  H02P25/02

CPC classification number: H02P6/08 ,  G11B5/022 ,  G11B5/5547 ,  H02P6/085 ,  H02P6/22 ,  H02P25/034

Abstract: There is described a control device for the change of the driving modality of an electromagnetic load (3); the electromagnetic load is passed through by a current (Ivcm). The device has at the input a control signal (L/P) to change the operation modality of an electromagnetic load (3) from a first operation modality (PWM) to a second operation modality (LIN) or vice versa and a signal (Tri_Peak, Tri_Mid) representative of the passage of current (Icvm) that passes through the load (3) for substantially its average value (IM). The device comprises first means (100, 201) adapted to synchronize the driving signal (L/P) for changing the first operation modality to the second operation modality or vice versa of the electromagnetic load with the signal (Tri_Peak, Tri_Mid) of the passage of current (Ivcm) passing through the load (3) for substantially its average value, and to generate a driving signal (S1p) as a function of said synchronization. ( Fig. 6 )

Abstract translation: 描述了用于改变电磁负载（3）的驱动模态的控制装置; 电流负载通过电流（Ivcm）。 该设备在输入端具有控制信号（L / P），以将电磁负载（3）的操作模式从第一操作模式（PWM）改变为第二操作模态（LIN）或反之亦然，信号（Tri_Peak ，Tri_Mid）代表通过负载（3）基本上其平均值（IM）的电流（Icvm）的通过。 所述装置包括适于使所述第一操作模态的驱动信号（L / P）与所述电磁负载的第二操作模态（或反之亦然）同步的通道的信号（Tri_Peak，Tri_Mid）的第一装置（100,201） 通过负载（3）的电流（Ivcm）基本上为其平均值，并且产生作为所述同步的函数的驱动信号（S1p）。 （图6）

公开(公告)号：EP1291852B1

公开(公告)日：2008-09-10

申请号：EP02015555.2

申请日：2002-07-11

Applicant: Hitachi Global Storage Technologies Japan, Ltd.

Inventor： Soyama, Yoshio, Hitachi, Ltd. Intellect. Property ,  Hata, Yuji, Hitachi, Ltd. Intellect. Property ,  Onoyama, Katsumoto, Hitachi, Ltd.Intellect.Propert

IPC: G11B5/55

CPC classification number: G11B33/1406 ,  G11B5/5534 ,  G11B5/5547 ,  G11B5/5565

公开(公告)号：EP1906390A2

公开(公告)日：2008-04-02

申请号：EP07106527.0

申请日：2007-04-19

Applicant: FUJITSU LIMITED

Inventor： Takaishi, Kazuhiko c/o Fujitsu Limited

IPC: G11B5/596

CPC classification number: G11B5/5547

Abstract: In a position control device based on a current observer control (26) for performing two degree of freedom control, calculation accuracy is improved using a fixed point processor. A target position trajectory (r(n))and position error (y(n)) are inputs of a two degree of freedom control system using an observer. Relative values of the target position (rd(n)) and position error (yd(n)) are used, so that the state variable of the observer can hold a relative distance from the reference position. Compared with the case of holding an absolute distance, a range where the value changes is smaller, and the number of effective digits of a decimal point can be increased, and calculation accuracy can be improved even if a fixed point method is used. As a consequence, control current becomes smooth and the generation of resonance and noise can be prevented in an acceleration period, and the generation of residual vibration can be prevented in a constant velocity period and deceleration period, and seek time can be decreased.

Abstract translation: 在基于用于执行两个自由度控制的当前观察者控制（26）的位置控制装置中，使用定点处理器来提高计算精度。 目标位置轨迹（r（n））和位置误差（y（n））是使用观察者的两个自由度控制系统的输入。 使用目标位置（rd（n））和位置误差（yd（n））的相对值，使得观察者的状态变量可以保持与参考位置的相对距离。 与保持绝对距离的情况相比，值的变化范围更小，并且可以增加小数点的有效位数，并且即使使用固定点方法也能够提高计算精度。 结果，控制电流变得平滑，并且可以在加速期间防止产生谐振和噪声，并且可以在恒定速度周期和减速时间段内防止产生残余振动，并且可以减少寻道时间。

公开(公告)号：EP1727133A2

公开(公告)日：2006-11-29

申请号：EP06009143.6

申请日：2006-05-03

Applicant: Samsung Electronics Co., Ltd.

Inventor： Lee, Jung-ho 832-301,Byuckjeokgol Jugong Apt

IPC: G11B5/55

CPC classification number: G11B5/5547

Abstract: Provided is a hard disc drive controlling method, and more particularly, a method of controlling track seek in a hard disc drive (HDD) provided against a shift between discs, and a computer readable recording medium having embodied thereon a computer program for the method. The method of controlling track seek in a HDD, including disc switching, includes: head switching to a head corresponding to a disc having a target track; calculating track seek length by comparing the previous target track address and the current target track address; determining whether or not the track seek length is shorter than the limit seek length set by considering a maximum possible shift amount of a disc; if the track seek length is shorter than the limit seek length, reading the track address of a track on which the head is put on the switched disc, and by referring to the read track address and the target track address, determining track seek length and a seek profile thereof; and performing track seek according to the determined seek profile. According to the track seek control method of the invention, even when there is a shift between discs, the shift is automatically reflected and compensated for when track seek is performed, such that stable track seek can be performed.

Abstract translation: 本发明提供一种硬盘驱动器的控制方法，更具体地，控制轨道的方法在对圆盘之间的偏移提供了一种硬盘驱动器（HDD）寻求，和计算机可读记录介质，其为所述方法的计算机程序。 控制轨道的方法寻求在HDD，包括盘开关，包括：磁头切换到磁头对应于具有目标轨道的盘; 轨道计算通过比较先前的目标磁道地址和当前目标轨道地址寻道长度; 确定性挖掘轨迹是否寻求长度比界限短寻道长度通过考虑光盘的最大可能位移量设置; 如果寻道长度大于限制短求长，阅读，头部被放在交换光盘上的磁道的磁道地址，并参照读磁迹地址和目标轨道地址，确定采矿寻道长度和 寻道其简档; 并进行寻道gemäß的确定性开采寻求轮廓。 。根据寻道发明控制方法中，即使当有盘之间的移位，移位自动反映和用于当寻道进行补偿，谋求确实稳定寻道可以执行。

公开(公告)号：EP1508894A3

公开(公告)日：2006-11-29

申请号：EP04254875.0

申请日：2004-08-13

Applicant: FUJITSU LIMITED

Inventor： Kagami, Yoshiyuki, c/o Fujitsu Limited ,  Tomita, Isamu, c/o Fujitsu Limited ,  Hashimoto, Shuichi, c/o Fujitsu Limited

IPC: G11B5/596 ,  G11B21/08 ,  G11B5/55

CPC classification number: G11B5/5547 ,  G11B5/59633 ,  G11B21/083

Abstract: A head control method controlling movement of a head on a recording disk. The disk has servo information recorded thereon at radially equal spacing, and is partitioned into one or more zones each associated with a coefficient for converting from actual track numbers based on the servo information, to apparent track numbers, allowing the apparent tracks to be given a variable spacing on the disk. At least in the case of a single zone, the coefficient is variable.

公开(公告)号：EP1641115A1

公开(公告)日：2006-03-29

申请号：EP04425713.7

申请日：2004-09-27

Applicant: STMicroelectronics S.r.l.

Inventor： Galbiati, Ezio

IPC: H02P7/00

CPC classification number: G11B5/5547 ,  G11B5/022 ,  H02P25/034

Abstract: The present invention refers to an apparatus for driving an electromagnetic load (LD). The apparatus comprises a power stage (1, 2) comprising at least one first (1) and one second (2) transistor half-bridge and the electromagnetic load (LD) is arranged between the first (1) and the second (2) half-bridge. The apparatus comprises a first (5) and a second (6) device suitable for driving in linear modality respectively the first (1) and the second (2) half-bridge and another device (7) suitable for driving in pulse width modulation modality the first half-bridge (1), first switch means (SW1) suitable for connecting the first half-bridge (1) to the first device (5) or to the other device (7) in response to a control signal (Lin/PWM), second switch means (SW2) suitable for connecting the second half-bridge (2) to the second device (6) in response to the control signal (Lin/PWM). The apparatus has an input signal (Vin) and comprises a further device (10) suitable for connecting the second half-bridge (2) to a first reference voltage (Vgate) and to a second reference voltage (GND), with said first reference voltage (Vgate) greater than said second reference voltage (GND), when said first half-bridge (1) is connected to the other device (7) suitable for driving it in pulse width modulation modality.

Abstract translation: 本发明涉及用于驱动电磁负载（LD）的装置。 该装置包括一个包括至少一个第一（1）和一个第二（2）晶体管半桥的功率级（1,2），并且电磁负载（LD）被布置在第一（1）和第二（2） 半桥。 该装置包括适于以线性模态分别驱动第一（1）和第二（2）半桥的第一（5）和第二（6）装置，以及适于以脉宽调制模式驱动的另一装置（7） 第一半桥（1），适于将第一半桥（1）连接到第一设备（5）或另一设备（7）的第一开关装置（SW1）响应于控制信号（Lin / PWM），适于根据控制信号（Lin / PWM）将第二半桥（2）连接到第二装置（6）的第二开关装置（SW2）。 该装置具有输入信号（Vin）并且包括适于将第二半桥（2）连接到第一参考电压（Vgate）和第二参考电压（GND）的另一设备（10），其中所述第一参考 当所述第一半桥（1）连接到适合以脉冲宽度调制模式驱动的另一装置（7）时，所述第二参考电压（GND）的电压（Vgate）大于所述第二参考电压（GND）。

公开(公告)号：EP1267331A3

公开(公告)日：2004-01-02

申请号：EP02018030.3

申请日：1995-01-04

Applicant: FUJITSU LIMITED

Inventor： Kohno, Keiichi ,  Nagasaka, Yoshiyuki ,  Kozuka, Tamotsu ,  Yoshida, Susumu ,  Takahashi, Tsuyoshi ,  Ishii, Masayoshi

IPC: G11B19/02 ,  G11B5/39 ,  G11B21/08

CPC classification number: G11B19/20 ,  G11B5/012 ,  G11B5/03 ,  G11B5/035 ,  G11B5/39 ,  G11B5/40 ,  G11B5/4886 ,  G11B5/5521 ,  G11B5/5547 ,  G11B5/56 ,  G11B5/59683 ,  G11B19/02 ,  G11B19/04 ,  G11B19/28 ,  G11B21/085 ,  G11B21/18 ,  G11B2005/0018

Abstract: A method of controlling a magnetic disk drive including: at least one magnetic head including a write element for writing data to a magnetic disk (100) and a magneto-resistive element for reading the data from the magnetic disk; a spindle motor for rotating the magnetic disk; and a rotary type actuator (101) for locating the magnetic head in a desired track position on the magnetic disk, the method comprising: a step of detecting whether or not the spindle motor reaches steady rotation from rotating start; a step of starting a supply of a bias current to the magneto-resistive element according to a detection of the steady rotation; a step of detecting that the write head performs on a data writing and detecting that there is no access to the drive between a predetermined interval during supply of the bias current to the magneto-resistive element; and a step of stopping the supply of a bias current to the magneto-resistive element when detecting that the write head performs on a data writing or that there is no access to the drive between a predetermined interval.

公开(公告)号：EP0802526B1

公开(公告)日：2003-06-11

申请号：EP97302206.4

申请日：1997-04-01

Applicant: International Business Machines Corporation

Inventor： Smith, Gordon J.

IPC: G11B5/55 ,  G11B5/41 ,  G11B23/50

CPC classification number: G11B5/41 ,  G11B5/5547 ,  G11B19/04 ,  G11B23/505

公开(公告)号：EP1187130A2

公开(公告)日：2002-03-13

申请号：EP01305919.1

申请日：2001-07-09

Applicant: ALPS ELECTRIC CO., LTD.

Inventor： Haitani, Munehisa

IPC: G11B21/08 ,  G11B5/55

CPC classification number: G11B5/5547 ,  G11B21/083

Abstract: A seek pattern formation circuit (5) includes a seek pattern generation circuit (2) for generating a seek pattern formed of a predetermined pulse train every time a step pulse is applied and a seek pattern shaping circuit (3) for shaping the seek pattern and supplying the shaped seek pattern to a stepping motor driver (6). When the period for which the step pulse is supplied is shorter than the period for which the seek pattern is generated, and when at least one of pulses included in the seek pattern is very narrow, the seek pattern shaping circuit selectively eliminates the narrow pulse. As a result, narrow pulses which may induce noise are not supplied to the stepping motor driver, and hence a malfunction in the stepping motor driver does not occur.

Abstract translation: 搜索图形形成电路（5）包括：寻道图案生成电路（2），用于在每次施加阶跃脉冲时产生由规定的脉冲串形成的搜索图形;以及搜索图案整形电路（3），用于对搜索图案进行整形;以及 向步进电机驱动器（6）提供成形的搜索图案。 当提供步进脉冲的周期短于产生搜索模式的周期时，并且当包括在搜索模式中的至少一个脉冲非常窄时，搜索模式整形电路选择性地消除窄脉冲。 结果，不会向步进电机驱动器提供可能引起噪声的窄脉冲，因此不会发生步进电动机驱动器的故障。