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1. 发明专利

JP2006107715A Retraction of disk drive head speed-controlled after power failure 审中-公开
标题翻译：电源故障后速度控制的磁盘驱动器头的返回
公开(公告)号：JP2006107715A
公开(公告)日：2006-04-20
申请号：JP2005283520
申请日：2005-09-29
申请人： Agere Systems Inc , アギアシステムズインコーポレーテッド
发明人： BRENDEN JASON P , DAHLBERG JAMES A
IPC分类号： G11B21/12
CPC分类号： G11B19/04 , G11B5/54 , G11B21/12
摘要： PROBLEM TO BE SOLVED: To provide a controller for controlling the retraction of a device conveyed on a movable member operated by an electric motor after a sudden power failure.
SOLUTION: The controller is provided with a measurement circuit for measuring a reverse electromotive force from an electric motor in measurement phase. The controller is further provided with a controller for receiving an actual speed, and supplies a command signal for controlling the size of a driving current based on an instructed speed and the actual speed of a movable member. The controller is yet further provided with a current control loop for supplying a command current signal based on a current supplied to the electric motor and the command signal, and supplying a driving current to the electric motor in a driving phase based on the command current signal.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种控制器，用于控制在突然停电之后由电动机操作的可移动部件上传送的装置的缩回。
解决方案：控制器设有测量电路，用于在测量阶段测量电动机的反向电动势。该控制器还设置有用于接收实际速度的控制器，并且基于指令速度和可移动部件的实际速度提供用于控制驱动电流的大小的命令信号。该控制器还具有电流控制回路，用于基于提供给电动机的电流和指令信号提供指令电流信号，并且基于指令电流信号在驱动相位中向电动机提供驱动电流。版权所有（C）2006，JPO＆NCIPI

2. 发明专利

JP2006107717A Retraction of disk drive head speed-controlled to remove offset 审中-公开
标题翻译：磁盘驱动器头的速度被控制以移除偏移
公开(公告)号：JP2006107717A
公开(公告)日：2006-04-20
申请号：JP2005283528
申请日：2005-09-29
申请人： Agere Systems Inc , アギアシステムズインコーポレーテッド
发明人： BRENDEN JASON P , DAHLBERG JAMES A
IPC分类号： G11B21/12
CPC分类号： G11B5/54
摘要： PROBLEM TO BE SOLVED: To provide a controller for controlling the retraction of a disk conveyed on a movable member operated by an electric motor.
SOLUTION: The controller is provided with a measurement circuit having an output including the addition of a measurement circuit offset voltage to a reverse electromotive force (reverse EMF) from an electric motor in measurement phase. The controller further includes an offset removal circuit connected to the output of the measuring circuit. The reverse EMF from the electric motor is output from the output of the offset removal circuit. A driver circuit is connected to the terminal of the electric motor, and supplies a driving current of a size based on the reverse EMF from the electric motor to the electric motor in a driving phase.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种用于控制在由电动机操作的可移动部件上传送的盘的缩回的控制器。解决方案：控制器设置有测量电路，其具有包括在测量阶段从电动机的反向电动势（反电动势）添加测量电路偏移电压的输出。控制器还包括连接到测量电路的输出的偏移消除电路。来自电动机的反电动势从偏移消除电路的输出输出。驱动电路连接到电动机的端子，并且在驱动阶段将来自电动机的基于反电动势的尺寸的驱动电流提供给电动机。版权所有（C）2006，JPO＆NCIPI

3. 发明专利

JP2006040515A Low cost emergency disk drive head retract architecture 有权
标题翻译：低成本紧急盘驱动头回缩架构
公开(公告)号：JP2006040515A
公开(公告)日：2006-02-09
申请号：JP2005212017
申请日：2005-07-22
申请人： Agere Systems Inc , アギアシステムズインコーポレーテッド
发明人： BRENDEN JASON P , DAHLBERG JAMES A
IPC分类号： G11B21/12
CPC分类号： G11B5/54 , G11B21/12
摘要： PROBLEM TO BE SOLVED: To provide architecture for providing power to a VCM to retract a transducing head from a surface of recordable medium during loss of power.
SOLUTION: A retract circuit (52) stores back electromotive force of a spindle motor (54) and shifts it to a capacitor (66) supplying power to the VCM (56). The capacitor is connected to a power switch circuit, the power switch circuit supplies power to the VCM from the capacitor when the power switch circuit is in a conducting state, and prevents power from being supplied to the VCM by the capacitor when the power switch circuit is in a non-conducting state. The retract circuit supplies a signal to the power switch circuit dictating whether the power switch circuit is in the conducting state or the non-conducting state. The retract circuit operates to alternate the power switch circuit between the conducting state and the non-conducting state at a set frequency, resulting in power being provided from the capacitor to the VCM at this frequency.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供用于向VCM提供电力以在功率损失期间从可记录介质的表面缩回换能头的架构。解决方案：收回电路（52）存储主轴电机（54）的反电动势，并将其移动到向VCM（56）供电的电容器（66）。电容器连接到电源开关电路，当电源开关电路处于导通状态时，电源开关电路从电容器向VCM供电，并且当电源开关电路处于非导电状态。缩回电路向功率开关电路提供指示电源开关电路是否处于导通状态或非导通状态的信号。缩回电路操作以在设定频率的导通状态和非导通状态之间交替电源开关电路，从而在该频率下从电容器向VCM提供功率。版权所有（C）2006，JPO＆NCIPI

4. 发明专利

JP2006107716A Retraction of disk drive head speed-controlled to reduce audible noise 审中-公开
标题翻译：磁盘驱动器头的速度控制减少可听噪声的返回
公开(公告)号：JP2006107716A
公开(公告)日：2006-04-20
申请号：JP2005283527
申请日：2005-09-29
申请人： Agere Systems Inc , アギアシステムズインコーポレーテッド
发明人： BRENDEN JASON P , DAHLBERG JAMES A
IPC分类号： G11B21/12
CPC分类号： G11B5/54 , G11B21/12
摘要： PROBLEM TO BE SOLVED: To provide a control circuit for controlling a current through a voice coil motor (VCM) when a conversion head is retracted from the surface of a recordable medium.
SOLUTION: A conversion head is conveyed on a movable member operated by a VCM. The control circuit is provided with a measurement circuit for measuring a reverse electromotive force (reverse EMF) from a VCM. This control is further provided with a driver circuit connected to the terminal of the VCM to supply a driving current of a size based on the reverse EMF from the VCM to the VCM. The control circuit is yet further provided with a chip clock for alternately executing measuring of the reverse EMF from the VCM and supplying of the driving current of a random frequency within a frequency range centering on a median frequency to the VCM.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：当转换头从可记录介质的表面缩回时，提供用于控制通过音圈电机（VCM）的电流的控制电路。
解决方案：转换头在由VCM操作的可移动部件上传送。该控制电路设置有用于从VCM测量反向电动势（反向电动势）的测量电路。该控制还具有连接到VCM的端子的驱动器电路，以将基于反向EMF的尺寸的驱动电流从VCM提供给VCM。控制电路还进一步设置有芯片时钟，用于交替执行来自VCM的反向EMF的测量，并将以中值频率为中心的频率范围内的随机频率的驱动电流提供给VCM。版权所有（C）2006，JPO＆NCIPI

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