VCM PWM control architecture for power saving in hard disk drives
    11.
    发明授权
    VCM PWM control architecture for power saving in hard disk drives 有权
    VCM PWM控制架构,用于在硬盘驱动器中节能

    公开(公告)号:US07848045B1

    公开(公告)日:2010-12-07

    申请号:US11511841

    申请日:2006-08-28

    IPC分类号: G11B21/02 G11B15/18

    CPC分类号: G11B19/02 G06F1/32

    摘要: The power required by a voice coil motor (VCM) to maintain the head in the data region of a disk drive during an idle mode is further reduced. The current supplied to the VCM is switched on and off. This takes advantage of the inherent inductance in the VCM, which maintains a current after the current supply is switched off. The current will slowly decay, with it being switched on again before it reaches a level where the average value won't offset the flex bias. In one embodiment, the current is maintained in a single direction, to offset the flex bias which pushes in one direction. Digital switches are used to reduce the power consumption of the control circuitry.

    摘要翻译: 音圈电机(VCM)在空闲模式期间将磁头保持在磁盘驱动器的数据区域所需的功率进一步降低。 提供给VCM的电流打开和关闭。 这充分利用了VCM中的固有电感,该电感在电流供应关闭后保持电流。 电流将慢慢衰减,在其达到平均值不会抵消挠曲偏差的水平之前再次接通。 在一个实施例中,电流保持在单个方向上,以抵消在一个方向上推动的柔性偏压。 数字开关用于降低控制电路的功耗。

    OUTPUT STAGE AND RELATED LOGIC CONTROL METHOD APPLIED TO SOURCE DRIVER/CHIP
    12.
    发明申请
    OUTPUT STAGE AND RELATED LOGIC CONTROL METHOD APPLIED TO SOURCE DRIVER/CHIP 有权
    输出级和相关逻辑控制方法应用于源驱动器/芯片

    公开(公告)号:US20080291598A1

    公开(公告)日:2008-11-27

    申请号:US12124397

    申请日:2008-05-21

    申请人: Cheng-Yong YANG

    发明人: Cheng-Yong YANG

    IPC分类号: H02H11/00 H03K19/094

    摘要: Output stage and related method applied to source driver/chip of LCD panel. While performing dot polarization inversion for even/odd channels of LCD panel, n-channel and p-channel MOS transistors of symmetric layout are respectively adopted for alternately transmitting a positive polarization signal of higher swing range and a negative polarization signal of lower swing range from corresponding drivers of asymmetric layout to the even/odd channels, such that a layout area for alternating polarizations can be reduced. Also, the invention directly ties inputs of the output drivers to VDD or VSS so as to turn off the drivers for providing high impedance at the even/odd channels when necessary.

    摘要翻译: 输出级和相关方法应用于LCD面板的源驱动器/芯片。 在对LCD面板的偶数/奇数通道执行点偏振反转时,分别采用对称布局的n沟道和p沟道MOS晶体管,以交替地传输较高摆动范围的正偏振信号和较低摆幅范围的负极化信号 对应于非偶数/奇数通道布局的驱动器,从而可以减少用于交替偏振的布局区域。 此外,本发明将输出驱动器的输入直接连接到VDD或VSS,以便在必要时关闭驱动器以在偶数/奇数通道提供高阻抗。

    Systems and methods for reducing spindle rectification switching
    13.
    发明授权
    Systems and methods for reducing spindle rectification switching 有权
    减少主轴整流开关的系统和方法

    公开(公告)号:US08279727B1

    公开(公告)日:2012-10-02

    申请号:US12350732

    申请日:2009-01-08

    IPC分类号: G11B7/00 G11B5/09 G11B15/18

    CPC分类号: G11B19/28

    摘要: In one embodiment the present invention includes a circuit comprising a switch and a switch driver. The switch is configured to provide synchronous rectification switching of a back-EMF voltage. The synchronous rectification switching produces a source voltage. The switch driver is configured to receive the back-EMF voltage and the source voltage. The switch driver provides a control signal to a control terminal of the switch. The control signal has a frequency. The frequency is used to control an amount of the synchronous rectification switching. Accordingly, the frequency reduces a dissipated power associated with the synchronous rectification switching.

    摘要翻译: 在一个实施例中,本发明包括一个包括开关和开关驱动器的电路。 开关配置为提供反电动势电压的同步整流开关。 同步整流开关产生源电压。 开关驱动器被配置为接收反电动势电压和源电压。 开关驱动器向开关的控制端提供控制信号。 控制信号具有频率。 该频率用于控制同步整流切换的量。 因此,频率降低与同步整流切换相关联的耗散功率。

    DETERMINING STUCK CONDITIONS FOR ELECTRIC MOTORS USING INDUCTIVE SENSING
    14.
    发明申请
    DETERMINING STUCK CONDITIONS FOR ELECTRIC MOTORS USING INDUCTIVE SENSING 有权
    使用电感式确定电机的保险条件

    公开(公告)号:US20120176072A1

    公开(公告)日:2012-07-12

    申请号:US13426056

    申请日:2012-03-21

    IPC分类号: H02P6/12

    CPC分类号: H02P29/0241 G01R31/343

    摘要: A control system includes a position control module, a power control module, and a diagnostic module. The position control module applies a driving current for positioning a rotor of a motor at one of first and second positions. The power control module applies a first voltage to one of first and second phases of the motor to generate a first current after the position control module applies the driving current to position the rotor at the first position. The power control module applies a second voltage to one of the first and second phases to generate a second current after the position control module applies the driving current to position the rotor at the second position. The diagnostic module determines when the rotor is restricted from rotating based on the first and second currents.

    摘要翻译: 控制系统包括位置控制模块,功率控制模块和诊断模块。 位置控制模块施加用于将马达的转子定位在第一和第二位置中的一个位置的驱动电流。 功率控制模块在位置控制模块施加驱动电流以将转子定位在第一位置之后,向电动机的第一和第二相之一施加第一电压以产生第一电流。 功率控制模块将第二电压施加到第一和第二相中的一个,以在位置控制模块施加驱动电流以将转子定位在第二位置之后产生第二电流。 诊断模块基于第一和第二电流确定转子何时被限制旋转。

    Determining stuck conditions for electric motors using inductive sensing
    15.
    发明授权
    Determining stuck conditions for electric motors using inductive sensing 有权
    使用感应感测定电机的卡住状态

    公开(公告)号:US08143825B2

    公开(公告)日:2012-03-27

    申请号:US12417680

    申请日:2009-04-03

    IPC分类号: H02P6/00

    CPC分类号: H02P29/0241 G01R31/343

    摘要: A control system includes a position control module, a power control module, and a diagnostic module. The position control module applies a driving current for positioning a rotor of a motor at one of first and second positions. The power control module applies a first voltage to one of first and second phases of the motor to generate a first current after the position control module applies the driving current to position the rotor at the first position. The power control module applies a second voltage to one of the first and second phases to generate a second current after the position control module applies the driving current to position the rotor at the second position. The diagnostic module determines when the rotor is restricted from rotating based on the first and second currents.

    摘要翻译: 控制系统包括位置控制模块,功率控制模块和诊断模块。 位置控制模块施加用于将马达的转子定位在第一和第二位置中的一个位置的驱动电流。 功率控制模块在位置控制模块施加驱动电流以将转子定位在第一位置之后,向电动机的第一和第二相之一施加第一电压以产生第一电流。 功率控制模块将第二电压施加到第一和第二相中的一个,以在位置控制模块施加驱动电流以将转子定位在第二位置之后产生第二电流。 诊断模块基于第一和第二电流确定转子何时被限制旋转。

    FAN MOTOR CONTROL SYSTEMS
    16.
    发明申请
    FAN MOTOR CONTROL SYSTEMS 有权
    风扇电机控制系统

    公开(公告)号:US20120007531A1

    公开(公告)日:2012-01-12

    申请号:US13233593

    申请日:2011-09-15

    IPC分类号: G05D23/20 H05K7/02

    摘要: A fan system includes a motor control module external to a motor housing of a fan assembly. The motor control module includes a speed control module. The fan assembly includes a fan and the motor housing. One or more first conductors are configured to connect the motor control module to a motor in the motor housing. One or more second conductors are configured to connect the motor control module to a host device control module. The host device control module is separate from the motor control module and is configured to generate a control signal. The speed control module is configured to control speed of the fan based on the control signal.

    摘要翻译: 风扇系统包括在风扇组件的电动机壳体外部的电动机控制模块。 电动机控制模块包括速度控制模块。 风扇组件包括风扇和电动机壳体。 一个或多个第一导体被配置为将电动机控制模块连接到电动机壳体中的电动机。 一个或多个第二导体被配置为将电动机控制模块连接到主机设备控制模块。 主机设备控制模块与电机控制模块分离,并被配置为产生控制信号。 速度控制模块被配置为基于控制信号来控制风扇的速度。

    Speed control systems and methods for decreasing power consumption in rotating storage devices
    17.
    发明授权
    Speed control systems and methods for decreasing power consumption in rotating storage devices 有权
    用于降低旋转存储设备功耗的速度控制系统和方法

    公开(公告)号:US07986483B1

    公开(公告)日:2011-07-26

    申请号:US12257885

    申请日:2008-10-24

    IPC分类号: G11B19/26

    CPC分类号: G11B19/26 G11B19/00

    摘要: A speed control system for a rotating storage device including a mode selection module configured to select an operating mode or a standby mode to operate the rotating storage device based on use of the rotating storage device and to select the standby mode after a first predetermined period during which reading and writing to the rotating storage device is not performed. The first predetermined period is selected based on a type of device in which the rotating storage device is implemented. The speed control system includes a speed control module configured to select a predetermined operating speed to rotate a storage medium of the rotating storage device when the operating mode is selected and to select a predetermined standby speed to rotate the storage medium when the standby mode is selected. The predetermined standby speed is (i) less than the predetermined operating speed and (ii) greater than zero.

    摘要翻译: 一种用于旋转存储装置的速度控制系统,包括模式选择模块,其被配置为基于使用旋转存储装置来选择操作模式或待机模式来操作旋转存储装置,并且在第一预定时段之后选择待机模式 不执行对旋转存储装置的读写。 基于实现旋转存储装置的装置的类型来选择第一预定时段。 速度控制系统包括速度控制模块,其被配置为当选择操作模式时选择预定的操作速度来旋转旋转存储装置的存储介质,并且当选择待机模式时选择预定的待机速度来旋转存储介质 。 预定待机速度为(i)小于预定操作速度,(ii)大于零。

    DETERMINING STUCK CONDITIONS FOR ELECTRIC MOTORS USING INDUCTIVE SENSING
    18.
    发明申请
    DETERMINING STUCK CONDITIONS FOR ELECTRIC MOTORS USING INDUCTIVE SENSING 有权
    使用电感式确定电机的保险条件

    公开(公告)号:US20100102768A1

    公开(公告)日:2010-04-29

    申请号:US12417680

    申请日:2009-04-03

    IPC分类号: G01R31/34 H02P6/18

    CPC分类号: H02P29/0241 G01R31/343

    摘要: A control system includes a position control module, a power control module, and a diagnostic module. The position control module applies a driving current for positioning a rotor of a motor at one of first and second positions. The power control module applies a first voltage to one of first and second phases of the motor to generate a first current after the position control module applies the driving current to position the rotor at the first position. The power control module applies a second voltage to one of the first and second phases to generate a second current after the position control module applies the driving current to position the rotor at the second position. The diagnostic module determines when the rotor is restricted from rotating based on the first and second currents.

    摘要翻译: 控制系统包括位置控制模块,功率控制模块和诊断模块。 位置控制模块施加用于将马达的转子定位在第一和第二位置中的一个位置的驱动电流。 功率控制模块在位置控制模块施加驱动电流以将转子定位在第一位置之后,向电动机的第一和第二相之一施加第一电压以产生第一电流。 功率控制模块将第二电压施加到第一和第二相中的一个,以在位置控制模块施加驱动电流以将转子定位在第二位置之后产生第二电流。 诊断模块基于第一和第二电流确定转子何时被限制旋转。

    System and method for detecting back electromotive force with automatic pole calibration
    19.
    发明授权
    System and method for detecting back electromotive force with automatic pole calibration 有权
    用自动极点校准检测反电动势的系统和方法

    公开(公告)号:US07385364B1

    公开(公告)日:2008-06-10

    申请号:US11806394

    申请日:2007-05-31

    发明人: Sakti Pada Rana

    IPC分类号: H02P3/08 G11B11/01

    CPC分类号: H02P6/182

    摘要: A system and method for determining the rotational speed of a motor, such as a three-phase disk drive motor, detects back electromotive force voltage generated during operation of the motor with an automatic pole calibration to minimize or eliminating variations in the wave of a freeze signal. A phase voltage at a winding is compared against a center tap (CT) voltage. Once the phase voltage falls to a specified voltage level, a detect signal is generated. A predetermined time after the detect signal is generated, a freeze signal is generated for freezing at least the circuit associated with the winding.

    摘要翻译: 用于确定诸如三相盘驱动电动机之类的电动机的转速的系统和方法用自动极校准来检测在电动机操作期间产生的反电动势电压,以最小化或消除冻结波中的变化 信号。 将绕组的相电压与中心抽头(CT)电压进行比较。 一旦相电压下降到指定的电压电平,就产生检测信号。 产生检测信号之后的预定时间,产生冻结信号,至少冻结与绕组相关的电路。

    Motor spindle control system and method
    20.
    发明授权
    Motor spindle control system and method 有权
    电机主轴控制系统及方法

    公开(公告)号:US07205744B1

    公开(公告)日:2007-04-17

    申请号:US11482560

    申请日:2006-07-07

    IPC分类号: G05B23/02

    CPC分类号: H02P6/182

    摘要: In a method for measuring motor speed and position by detecting the back EMF generated during pole-pair interactions, a separate respective duration of a power phase suppression signal, that is set during back EMF detection, is stored in memory for each respective pole. The separate respective duration values are determined during a calibration phase by iteratively lengthening each respective duration one unit at a time (up to a maximum value) until no part of the respective back EMF signal occurs outside the suppression signal duration, and those values are stored. During operation, the approach of a pole-pair interaction may be determined from the electrical cycle of the power supply, and then the stored duration value is used to control the state of the suppression signal.

    摘要翻译: 在用于通过检测在极对相互作用期间产生的反电动势来测量电动机速度和位置的方法中,在反电动势检测期间设置的功率相位抑制信号的单独的相应持续时间被存储在每个相应极的存储器中。 在校准阶段期间通过每次相应地延长一个单位一个单位(最多达到最大值),直到相应的反EMF信号的部分不在抑制信号持续时间之外发生,并且这些值被存储 。 在运行期间,可以从电源的电周期确定极对相互作用的方法,然后使用存储的持续时间值来控制抑制信号的状态。