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1. 发明授权

US08807956B2 Apparatus and method for controlling speed of a fan via a first control module connected by a cable and/or conductors between a motor and a second control module 有权
标题翻译：用于通过第一控制模块控制风扇的装置和方法，所述第一控制模块通过电缆和/或电动机和第二控制模块之间的导体连接
公开(公告)号：US08807956B2
公开(公告)日：2014-08-19
申请号：US13233593
申请日：2011-09-15
申请人： Ravishanker Krishnamoorthy , Foo Leng Leong , Edy Susanto , Yayue Zhang , Cheng Yong Teoh
发明人： Ravishanker Krishnamoorthy , Foo Leng Leong , Edy Susanto , Yayue Zhang , Cheng Yong Teoh
IPC分类号： F04B45/06 , F04B35/04 , F04B49/00
CPC分类号： F04D27/004 , F04D13/0693 , F04D15/0094 , F04D25/0693 , F04D27/001 , H02K29/12 , H02K29/14 , H02P6/08 , H02P6/182 , H02P29/032
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。

2. 发明授权

US08638519B1 Speed control systems and methods for decreasing power consumption in rotating storage devices 有权
标题翻译：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：US08638519B1
公开(公告)日：2014-01-28
申请号：US13602879
申请日：2012-09-04
申请人： Edy Susanto , Foo Leng Leong , Cheng Yong Teoh
发明人： Edy Susanto , Foo Leng Leong , Cheng Yong Teoh
IPC分类号： G11B19/26
CPC分类号： G11B19/26 , G11B19/00
摘要： A system including a monitoring module configured to monitor whether, during a first predetermined period, at least one of a read operation, a write operation, or a seek operation is performed on a platter of a storage device in response to the platter of the storage device rotating at a first speed. A speed control module is configured to rotate the platter of the storage device at a second speed in response to none of the read operation, the write operation, or the seek operation being performed on the platter of the storage device during the first predetermined period. The second speed is (i) less than the first speed, and (ii) greater than zero. None of the read operation, the write operation, or the seek operation is performed on the platter of the storage device in response to the platter of the storage device rotating at the second speed.
摘要翻译：一种系统，包括监视模块，该监视模块被配置为响应于所述存储器的盘片，在第一预定时段期间是否在存储设备的盘片上执行读取操作，写入操作或寻找操作中的至少一个装置以第一速度旋转。速度控制模块被配置为响应于在第一预定时段期间在存储设备的盘上执行的任何读取操作，写入操作或搜索操作都不以第二速度旋转存储设备的盘片。第二速度是（i）小于第一速度，和（ii）大于零。响应于以第二速度旋转的存储装置的盘片，在存储装置的盘片上不执行读取操作，写入操作或搜索操作。

3. 发明授权

US08390226B1 Voltage mode using pseudo current limit 有权
标题翻译：电压模式使用伪电流限制
公开(公告)号：US08390226B1
公开(公告)日：2013-03-05
申请号：US12177084
申请日：2008-07-21
申请人： Ravishanker Krishnamoorthy , Foo Leng Leong
发明人： Ravishanker Krishnamoorthy , Foo Leng Leong
IPC分类号： H02P7/00
CPC分类号： H02P6/08 , H02P6/28 , H02P23/20
摘要： According to an aspect of the invention, a method includes: applying a voltage across a motor to accelerate the motor over a predetermined number of time intervals; determining whether a current flowing through the motor decreases as the motor accelerates over the predetermined number of time intervals; and increasing the voltage by a predetermined voltage amount during each time interval if it is determined that the current is decreasing.
摘要翻译：根据本发明的一个方面，一种方法包括：在电动机上施加电压以在预定数量的时间间隔上加速电动机; 确定流过电动机的电流是否随着电动机超过预定数量的时间间隔而减小; 并且如果确定电流正在减小，则在每个时间间隔期间将电压增加预定电压量。

4. 发明授权

US08314581B1 Motor spindle control system and method 有权
标题翻译：电机主轴控制系统及方法
公开(公告)号：US08314581B1
公开(公告)日：2012-11-20
申请号：US12965259
申请日：2010-12-10
申请人： Ravishanker Krishnamoorthy , Foo Leng Leong
发明人： Ravishanker Krishnamoorthy , Foo Leng Leong
IPC分类号： H02P6/18
CPC分类号： H02P6/182 , G11B19/28 , H02P6/10
摘要： A control system and method for a multi-phase motor substantially reduces or eliminates jitter resulting from drive mismatch by replacing a conventional trapezoidal drive profile with a drive profile that causes the voltage applied across active phases of the motor to match the back-EMF across those phases. In an ideal motor, the back-EMF is substantially sinusoidal, and although the drive profile applied to each phase is not truly substantially sinusoidal, the drive voltage across the active phases is substantially sinusoidal. In a non-ideal motor, the back-EMF is not truly sinusoidal and the drive profiles applied to each phase are calculated to cause the drive voltage across the active phases to match the back-EMF across those phases.
摘要翻译：用于多相电动机的控制系统和方法通过用驱动轮廓代替传统的梯形驱动轮廓来显着地减少或消除由于驱动器失配而产生的抖动，该驱动轮廓导致在电动机的有效相上施加的电压匹配电动机的反电动势阶段在理想的电动机中，反电动势基本上是正弦的，并且虽然施加到每个相的驱动轮廓不是真正基本上是正弦的，但是有效相两端的驱动电压基本上是正弦的。在非理想电动机中，反电动势不是真正的正弦曲线，并且计算应用于每个相位的驱动器曲线，以使有源相之间的驱动电压与这些相位之间的反电动势匹配。

5. 发明申请

US20120206072A1 EXTERNAL DISTURBANCE DETECTION SYSTEM AND METHOD FOR TWO-PHASE MOTOR CONTROL SYSTEMS 有权
标题翻译：用于两相电动机控制系统的外部干扰检测系统和方法
公开(公告)号：US20120206072A1
公开(公告)日：2012-08-16
申请号：US13453661
申请日：2012-04-23
申请人： Foo Leng Leong , Edy Susanto , Ravishanker Krishnamoorthy
发明人： Foo Leng Leong , Edy Susanto , Ravishanker Krishnamoorthy
IPC分类号： H02P6/12
CPC分类号： H02P6/06
摘要： A system includes a power control module, a period determination module, and a control module. The power control module controls current through stator coils of a motor to rotate a rotor. The period determination module determines a first length of time between a first set of induced stator coil voltages and determines a second length of time between a second set of induced stator coil voltages. The control module determines whether an external disturbance disturbs rotation of the rotor based on a difference between the first and second lengths of time.
摘要翻译：系统包括功率控制模块，周期确定模块和控制模块。功率控制模块通过电动机的定子线圈控制电流来旋转转子。周期确定模块确定第一组感应定子线圈电压之间的第一时间长度，并确定第二组感应定子线圈电压之间的第二时间长度。控制模块基于第一和第二时间长度之间的差来确定外部干扰是否干扰转子的旋转。

6. 发明授权

US08044616B1 Method and apparatus for initializing operation of a disk drive 有权
标题翻译：用于初始化磁盘驱动器的操作的方法和装置
公开(公告)号：US08044616B1
公开(公告)日：2011-10-25
申请号：US12340944
申请日：2008-12-22
申请人： Ravishanker Krishnamoorthy , Foo Leng Leong
发明人： Ravishanker Krishnamoorthy , Foo Leng Leong
IPC分类号： H02P1/00
CPC分类号： G11B19/2054
摘要： A system for controlling a disk in a disk drive includes a motor control circuit and a first circuit that retrieves firmware speed control instructions from non-volatile memory. During retrieval of the firmware speed control instructions, at least one of the motor control circuit determines a position of the disk, one of the first circuit and the motor control circuit spins up the disk and the motor control circuit ramps up a speed of the disk. The first circuit performs speed control of the disk based on the firmware speed control instructions.
摘要翻译：用于控制磁盘驱动器中的磁盘的系统包括马达控制电路和从非易失性存储器检索固件速度控制指令的第一电路。在检索固件速度控制指令期间，电动机控制电路中的至少一个确定盘的位置，第一电路和电动机控制电路中的一个将盘旋转并且电动机控制电路升高盘的速度。第一个电路基于固件速度控制指令执行磁盘的速度控制。

7. 发明申请

US20100117571A1 EXTERNAL DISTURBANCE DETECTION SYSTEM AND METHOD FOR TWO-PHASE MOTOR CONTROL SYSTEMS 有权
标题翻译：用于两相电动机控制系统的外部干扰检测系统和方法
公开(公告)号：US20100117571A1
公开(公告)日：2010-05-13
申请号：US12480259
申请日：2009-06-08
申请人： Foo Leng Leong , Edy Susanto , Ravishanker Krishnamoorthy
发明人： Foo Leng Leong , Edy Susanto , Ravishanker Krishnamoorthy
IPC分类号： H02P6/06
CPC分类号： H02P6/06
摘要： A system includes a power control module, a period determination module, and a control module. The power control module controls current through stator coils of a motor to rotate a rotor. The period determination module determines a first length of time between a first set of induced stator coil voltages and determines a second length of time between a second set of induced stator coil voltages. The control module determines whether an external disturbance disturbs rotation of the rotor based on a difference between the first and second lengths of time.
摘要翻译：系统包括功率控制模块，周期确定模块和控制模块。功率控制模块通过电动机的定子线圈控制电流来旋转转子。周期确定模块确定第一组感应定子线圈电压之间的第一时间长度，并确定第二组感应定子线圈电压之间的第二时间长度。控制模块基于第一和第二时间长度之间的差来确定外部干扰是否干扰转子的旋转。

8. 发明授权

US07196484B1 Motor spindle control system and method 有权
标题翻译：电机主轴控制系统及方法
公开(公告)号：US07196484B1
公开(公告)日：2007-03-27
申请号：US11345850
申请日：2006-02-01
申请人： Siew Youn Chui , Foo Leng Leong
发明人： Siew Youn Chui , Foo Leng Leong
IPC分类号： H02K23/00
CPC分类号： H02P6/182 , G11B19/28 , H02P2209/07
摘要： In a method for measuring motor speed and position by detecting the back-EMF generated during pole-pair interactions, fluctuations of a three-phase motor power supply that may affect back-EMF detection are reduced. One phase of the power supply is tristated for a certain interval preceding and during back-EMF detection. For a shorter interval during back-EMF detection, the voltage drop across the motor is reduced from the full power supply voltage. This preferably is accomplished either by pulling a first of the other two power supply phases low, while pulling a second of the other two power supply phases up to a regulated voltage below the power supply voltage, or by pulling the second of the other two phases up to the power supply voltage and pulling the first of the other two phases down to a regulated voltage above ground.
摘要翻译：在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，减小了可能影响反电动势检测的三相电动机电源的波动。电源的一个阶段在反电动势检测之前和期间都保持一定的间隔。对于反电动势检测期间较短的间隔，电机两端的电压降从全电源电压降低。这优选地通过将另外两个电源相位中的第一相位拉低，同时将另外两个电源相位中的第二个拉至低于电源电压的调节电压，或者通过拉动另外两个相位中的第二相直到电源电压并将另外两个相位的第一个相位降低到地面以上的稳压电压。

9. 发明授权

US08853985B2 Back-EMF detection for motor control 有权
标题翻译：用于电机控制的反电动势检测
公开(公告)号：US08853985B2
公开(公告)日：2014-10-07
申请号：US13223705
申请日：2011-09-01
申请人： Ravishanker Krishnamoorthy , Foo Leng Leong , Edy Susanto
发明人： Ravishanker Krishnamoorthy , Foo Leng Leong , Edy Susanto
IPC分类号： H02P1/00 , H02P6/18
CPC分类号： H02P6/182 , H02P6/187
摘要： Systems, methods, and other embodiments associated with back-EMF detection for motor control are described. In an embodiment, an apparatus includes a drive circuit configured to apply excitation signals to respective inputs of a motor, a signal inhibit circuit configured to convey a signal to inhibit application of the excitation signals during an interval, and a measuring circuit configured to measure a back-electromotive force (EMF) signal crossing a reference signal during the interval.
摘要翻译：描述了与用于电动机控制的反电动势检测相关联的系统，方法和其它实施例。在一个实施例中，一种装置包括：驱动电路，被配置为将激励信号施加到电动机的相应输入;信号禁止电路，被配置为传送信号以阻止在间隔期间施加激励信号;以及测量电路，反电动势（EMF）信号在间隔期间与参考信号交叉。

10. 发明授权

US08614556B1 Down sampling method for hard disk speed control loop 有权
标题翻译：硬盘速度控制循环的下采样方法
公开(公告)号：US08614556B1
公开(公告)日：2013-12-24
申请号：US13598541
申请日：2012-08-29
申请人： Kiyotada Ito , Takahiro Inoue , Foo Leng Leong
发明人： Kiyotada Ito , Takahiro Inoue , Foo Leng Leong
IPC分类号： H02P6/16 , G05B11/01
CPC分类号： G11B19/28 , H02P6/10 , H02P6/17
摘要： In some implementations, a method includes receiving rotational speed information corresponding to a rotational speed of a spindle motor having a plurality of poles, down sampling the rotational speed information to obtain speed-related information associated with the spindle motor, and adjusting the rotational speed of the spindle motor based on the speed-related information.
摘要翻译：在一些实施方式中，一种方法包括接收与具有多个极的主轴电动机的转速相对应的转速信息，对转速信息进行下采样以获得与主轴电动机相关联的速度相关信息，以及调整转速信息主轴电机基于速度相关信息。

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