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    Apparatus for damping rotation of turntable
    1.
    发明授权
    Apparatus for damping rotation of turntable 失效
    用于阻尼转盘旋转的装置

    公开(公告)号：US4127799A

    公开(公告)日：1978-11-28

    申请号：US823654

    申请日：1977-08-11

    Applicant: Tsutomu Nakamura ,  Ryuichi Koike

    Inventor： Tsutomu Nakamura ,  Ryuichi Koike

    IPC: H02P6/24 ,  G11B19/20 ,  G11B19/22 ,  G11B19/28 ,  H02K29/14 ,  H02P3/06 ,  H02P3/10

    CPC classification number: H02P3/06 ,  G11B19/2009 ,  G11B19/22 ,  G11B19/28 ,  H02K29/14

    Abstract: A disc record player in which a turntable is driven by a motor comprising a rotor magnet having plural magnetic poles arranged separately along the periphery of the turntable, stator coils disposed in the magnetic field of the rotor magnet and Hall-effect elements sequentially coupled magnetically to the poles of the rotor magnet for generating output signals having polarities corresponding to the polarities of the poles of the rotor magnet, and causing the rotor magnet to rotate by supplying the output signals of the Hall-effect elements to the stator coils, wherein a first and a second speed detecting coils for generating signals having phases different from each other are disposed in the magnetic field of the rotor magnet, wherein the output signals of the first and second speed detecting coils respectively turn the gate circuit off and on and when the turntable is to be stopped, the gate circuit is turned on by the output signal of the second speed detecting coil, and wherein the rotation of the turntable is damped by controlling the polarities of the output signals of the Hall-effect elements with the output signal of the gate circuit and thereby causing the stator coils to generate the magnetic flux to rotate the rotor magnet in the reverse direction.

    Abstract translation: 一种唱盘播放器，其中转盘由电动机驱动，该电动机包括转子磁体，转子磁体具有沿转台周边分开设置的多个磁极，定子线圈设置在转子磁体的磁场中，霍尔效应元件依次磁耦合耦合到 转子磁体的极，用于产生具有对应于转子磁体的极极性的极性的输出信号，并且通过将霍尔效应元件的输出信号提供给定子线圈使转子磁体旋转，其中第一 并且在转子磁体的磁场中设置用于产生彼此相位不同的信号的第二速度检测线圈，其中第一和第二速度检测线圈的输出信号分别关闭和打开门电路，并且当转台 要停止，门电路被第二速度检测线圈的输出信号接通，并且其中r 通过利用门电路的输出信号控制霍尔效应元件的输出信号的极性，从而使定子线圈产生磁通量使转子磁体沿相反方向旋转，从而阻尼转台的转动。

    Disk reproducing speed control method and a disk reproducing apparatus using the same
    3.
    发明授权
    Disk reproducing speed control method and a disk reproducing apparatus using the same 失效
    磁盘重放速度控制方法及使用其的磁盘重放装置

    公开(公告)号：US5963517A

    公开(公告)日：1999-10-05

    申请号：US785537

    申请日：1997-01-17

    Applicant: Harushige Nakagaki ,  Tokinori Furuichi ,  Kazuhiro Oda ,  Ryuichi Koike ,  Hideo Suenaga

    Inventor： Harushige Nakagaki ,  Tokinori Furuichi ,  Kazuhiro Oda ,  Ryuichi Koike ,  Hideo Suenaga

    IPC: G11B19/20 ,  G11B7/095 ,  G11B19/04 ,  G11B19/28 ,  G11B21/10 ,  G11B5/09 ,  G11B17/22

    CPC classification number: G11B19/28 ,  G11B19/04 ,  G11B21/106 ,  G11B7/0953 ,  G11B7/0956

    Abstract: An method to prevent excessive heat generation of the pickup actuator from occurring when a disk has a large eccentricity or planar vibration in a high-speed disk reproducing apparatus using an optical pickup. The disk reproducing apparatus has a status determining arrangement for monitoring a present actuator drive state, an analyzing arrangement for analyzing an output signal of the status determining arrangement, and disk rotational speed switching control arrangement for selecting disk reproducing speeds according to a control signal of the identification means, thereby lowering the reproducing speed when the eccentricity or planar vibration is large. Such invention prevents heat generation of the pickup actuator from occurring because high-speed reproduction can be performed when the eccentricity or planar vibration is small, and reproduction speed can be automatically reduced when the eccentricity or planar vibration is large.

    Abstract translation: 在使用光学拾取器的高速盘再现装置中，当盘具有大的偏心率或平面振动时，防止拾取器致动器过度产生热量的方法。 盘再现装置具有用于监视当前致动器驱动状态的状态确定装置，用于分析状态确定装置的输出信号的分析装置和用于根据控制信号选择盘重放速度的盘旋转速度切换控制装置 识别装置，从而当偏心或平面振动较大时降低重放速度。 这样的发明防止了拾取器致动器的发热，因为当偏心率或平面振动小时可以执行高速再现，并且当偏心率或平面振动较大时可以自动减小再现速度。

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