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41 条记录 (耗时 0.01 秒)

    METHOD OF RECOVERING ENERGY FROM THE TURNTABLE MOTOR IN AN OPTICAL DISC DRIVE AND OPTICAL DEVICE
    1.
    发明公开
    METHOD OF RECOVERING ENERGY FROM THE TURNTABLE MOTOR IN AN OPTICAL DISC DRIVE AND OPTICAL DEVICE 有权
    中回收能量的轮毂电机的光盘驱动器和光盘装置

    公开(公告)号：EP1908068A2

    公开(公告)日：2008-04-09

    申请号：EP06766011.8

    申请日：2006-07-06

    申请人： Koninklijke Philips Electronics N.V.

    发明人： LOOIJMANS, Hendrikus, A., J. ,  HEZEMANS, Cornelius, A. ,  VAN BIJNEN, Joop

    IPC分类号： G11B19/20 ,  G11B19/00 ,  G11B19/26 ,  G11B19/22

    CPC分类号： G11B19/20 ,  G11B19/00 ,  G11B19/22 ,  G11B19/26

    摘要： The present invention relates to a method of recovering energy from the turntable motor (12) in an optical disc drive comprising a power supply and a circuitry (10) that is capable of selectively feeding a current from the power supply into the motor in a first state and from the motor into the power supply in a second state, the method comprising the steps of: decelerating the motor, during decelerating the motor, repeatedly calculating a ratio between a duration of the first state and a duration of the second state in dependence on an angular velocity of the motor, such that a current integrated over the whole decelerating process is fed from the motor into the power supply, and after calculating the ratio, selecting the duration of the first state and the duration of the second state in accordance with the calculated ratio. The present invention further relates to an optical device.

    Motor brake circuit for use in a magnetic disk drive system
    6.
    发明公开
    Motor brake circuit for use in a magnetic disk drive system 失效
    用于磁盘驱动系统的电动制动电路

    公开(公告)号：EP0441030A3

    公开(公告)日：1992-09-09

    申请号：EP90311778.6

    申请日：1990-10-26

    申请人： SEAGATE TECHNOLOGY INTERNATIONAL

    发明人： Palm, William A.

    IPC分类号： G11B19/22 ,  G11B19/20

    CPC分类号： G11B19/20 ,  G11B19/22

    摘要： The invention provides apparatus and a method for use in a storage system for braking a storage disk (12) driven by a spindle drive motor (16) with a coil (20A, 20B, 20C). The invention includes trigger means (34, 38) for detecting the back EMF generated in the coil when there is a loss of power and for actuating means (48 to 52, 94 to 98, 132) for electrically shorting the coil when the back EMF falls below a pre-determined level. This level is selected to be large enough so that the rate of rotation of the magnetic disk is sufficient for a magnetic head of the system to "fly" over the surface of the disk, but small enough so that surge currents in the drive spindle motor will not damage the coil.

    A METHOD AND APPARATUS FOR CONTROLLING A DISK DRIVE UNDER A POWER LOSS CONDITION
    9.
    发明公开
    A METHOD AND APPARATUS FOR CONTROLLING A DISK DRIVE UNDER A POWER LOSS CONDITION 审中-公开
    方法和设备的用于控制传动板，以防电源

    公开(公告)号：EP1169706A1

    公开(公告)日：2002-01-09

    申请号：EP99973721.6

    申请日：1999-02-25

    申请人： STMicroelectronics Asia Pacific Pte Ltd.

    发明人： KRISHNAMOORTHY, Ravishanker ,  FONG, Hin Sing

    IPC分类号： G11B19/20 ,  G11B21/12 ,  G11B19/22

    CPC分类号： G11B19/20 ,  G11B19/22 ,  G11B21/12

    摘要： In a disk drive, a synchronized chopping scheme is described for deriving high peak currents from a coasting spindle motor under pwer down conditions to supply power to other circuits. These circuits need to perform certain functions to avoid physical damage to the data storage area as well as the read/write head. The maximum current that can be delivered by the back-emf (BEMF) in the spindle motor is limited by the motor parameters and the circuit elements. By synchronised out-of-phase chopping of the connections between a driving circuit and the spindle and head positioning motors, a storage capacitor in the driving circuit can be made much smaller, and the unused power dissipated as heat in a clamp circuit is minimized. This is achieved by directly transferring the energy from the spindle to the necessary circuits with synchronized control of the spindle and the circuits that need to operate under no power condition.

    Method and apparatus for braking a disk drive
    10.
    发明公开
    Method and apparatus for braking a disk drive 有权
    用于制动磁盘驱动器的方法和设备

    公开(公告)号：EP0927998A2

    公开(公告)日：1999-07-07

    申请号：EP98310679.0

    申请日：1998-12-23

    申请人： TEXAS INSTRUMENTS INC.

    发明人： Barua, Shaibal ,  Krenik, William R.

    IPC分类号： G11B19/20 ,  G11B19/22

    CPC分类号： G11B19/20 ,  G11B5/54 ,  G11B19/22

    摘要： For braking a disk drive when a power fault occurs, a circuit (10) produces an output signal (28) indicating that the motor of the disk drive has slowed at least to a predetermined rotational speed after the occurrence of the power fault. Components of the circuit (10) may be integrated onto the same integrated circuit as the motor driving circuitry or head retract circuitry. During the time between the occurrence of the power fault and the time the disk drive has slowed to the predetermined rotational speed, the read/write head mechanism (17) is retracted. A braking circuit then brakes the disk drive when the output signal (28) indicates that the motor has slowed at least to the predetermined rotational speed. The circuit for producing an output signal indicating that the motor has slowed at least to the predetermined rotational speed is actuated by the back-emf (14) generated by the motor falling below a predetermined level.

    摘要翻译： 为了在发生电力故障时制动盘驱动器，电路（10）产生输出信号（28），该输出信号指示在发生电力故障之后盘驱动器的电机已经至少减速到预定转速。 电路（10）的组件可以集成到与电机驱动电路或磁头缩回电路相同的集成电路上。 在发生电源故障和磁盘驱动器减速到预定转速之间的时间内，读/写头机构（17）缩回。 当输出信号（28）指示电机已经至少减速到预定转速时，制动电路然后制动盘驱动器。 用于产生指示电动机已经至少减速到预定转速的输出信号的电路由电动机产生的反电动势（14）降低到预定电平以下来致动。