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1. 发明授权

US08791664B2 Systems and methods for adaptive torque adjustment and motor control 有权
标题翻译：用于自适应扭矩调节和电机控制的系统和方法
公开(公告)号：US08791664B2
公开(公告)日：2014-07-29
申请号：US13010928
申请日：2011-01-21
申请人： Ravishanker Krishnamoorthy , Edy Susanto , Cheng Yong Teoh , Foo Leng Leong
发明人： Ravishanker Krishnamoorthy , Edy Susanto , Cheng Yong Teoh , Foo Leng Leong
IPC分类号： H02P27/00
CPC分类号： H02P6/08 , H02P6/06 , H02P6/15 , H02P6/28
摘要： A system includes a target speed module and a pulse-width modulation (PWM) control module. The target speed module is configured to provide a first waveform based on a first speed setting for a motor. A start of a first cycle of the first waveform corresponds to at least one of a first current or a first voltage. The PWM control module is configured to shift a phase of the first waveform by a torque angle adjustment value to generate a second waveform. A start of a first cycle of the second waveform corresponds to at least one of a second voltage or a second current. The second voltage is greater than the first voltage, and the second current is greater than the first current. The PWM control module is configured to control the motor based on the second waveform.
摘要翻译：系统包括目标速度模块和脉冲宽度调制（PWM）控制模块。目标速度模块被配置为基于用于电动机的第一速度设置来提供第一波形。第一波形的第一周期的开始对应于第一电流或第一电压中的至少一个。 PWM控制模块被配置为将第一波形的相位移位一个转矩角度调整值以产生第二波形。第二波形的第一周期的开始对应于第二电压或第二电流中的至少一个。第二电压大于第一电压，第二电流大于第一电流。 PWM控制模块被配置为基于第二波形来控制电动机。

2. 发明授权

US08472233B1 Circuits and methods for multiple programmable memory using one-time programmable memory 有权
标题翻译：使用一次性可编程存储器的多个可编程存储器的电路和方法
公开(公告)号：US08472233B1
公开(公告)日：2013-06-25
申请号：US13461624
申请日：2012-05-01
申请人： Ravishanker Krishnamoorthy , Foo Leng Leong
发明人： Ravishanker Krishnamoorthy , Foo Leng Leong
IPC分类号： G11C17/00
CPC分类号： G11C17/18
摘要： Circuits and methods for utilizing multiple programmable memory using one-time programmable (OTP) memory in a device controller. The device controller generally includes a plurality of OTP memories, each capable of being programmed once and only once; a state machine configured to enable writing updated parameter information to an available OTP memory and to provide a control signal indicating a next OTP memory to which next received data are to be written, and read logic coupled to the plurality of OTP memories, the read logic configured to read an output from a most recently programmed OTP memory. The method generally includes receiving updated parameter information to be stored in the memory, programming one of a plurality of one-time programmable (OTP) memories with the updated parameter information, indicating an availability of a next OTP memory, and reading an output from a most recently programmed OTP memory.
摘要翻译：在设备控制器中使用一次性可编程（OTP）存储器来利用多个可编程存储器的电路和方法。设备控制器通常包括多个OTP存储器，每个OTP存储器能够被编程一次且仅一次; 状态机，被配置为使得能够向可用的OTP存储器写入更新的参数信息，并且提供指示下一个接收数据要被写入的下一个OTP存储器的控制信号，以及耦合到所述多个OTP存储器的读逻辑，所述读逻辑配置为读取最近编程的OTP存储器的输出。该方法通常包括接收要存储在存储器中的更新的参数信息，用更新的参数信息编程多个一次可编程（OTP）存储器中的一个，指示下一个OTP存储器的可用性，以及从最近编程的OTP内存。

3. 发明授权

US08164285B2 External disturbance detection system and method for two-phase motor control systems 有权
公开(公告)号：US08164285B2
公开(公告)日：2012-04-24
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： H02P6/00
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.

4. 发明授权

US08330586B2 Systems and methods for programming of a cooling fan via a serial port communication mode 有权
标题翻译：通过串行端口通信模式对冷却风扇进行编程的系统和方法
公开(公告)号：US08330586B2
公开(公告)日：2012-12-11
申请号：US12707910
申请日：2010-02-18
申请人： Ravishanker Krishnamoorthy , Foo Leng Leong , Edy Susanto
发明人： Ravishanker Krishnamoorthy , Foo Leng Leong , Edy Susanto
IPC分类号： G08C15/08 , G06F9/24 , F04B49/00
CPC分类号： F04D27/001 , F04D27/006
摘要： Embodiments of the present disclosure provide a method that comprises, based upon receipt of a mode command, changing an operating mode of a fan motor controller of a fan to a serial port communication protocol, programming a memory of the fan motor controller with an operating parameter of the fan, and based upon receipt of a serial port command, changing the operating mode of the fan motor controller from the serial port communication protocol to another protocol.
摘要翻译：本公开的实施例提供一种方法，其包括：基于接收到模式命令，将风扇的风扇电动机控制器的操作模式改变为串行端口通信协议，使用操作参数来编程风扇电动机控制器的存储器的风扇，并且基于接收到串行端口命令，将风扇电动机控制器的操作模式从串行端口通信协议改变为另一协议。

5. 发明授权

US08278861B2 External disturbance detection system and method for two-phase motor control systems 有权
标题翻译：二相电机控制系统外部扰动检测系统及方法
公开(公告)号：US08278861B2
公开(公告)日：2012-10-02
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： H02P6/18
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

US08269440B2 Motor speed control system and method without pulse-width modulation 有权
标题翻译：电机速度控制系统和方法，无脉宽调制
公开(公告)号：US08269440B2
公开(公告)日：2012-09-18
申请号：US12480161
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： H02P23/12
CPC分类号： H02P6/182 , H02P6/08
摘要： A motor control system includes a power control module and a detection module. The power control module controls power applied to first and second stator coils of a motor to rotate a rotor. The rotor induces voltages in the first and second stator coils when the rotor is rotating. The detection module determines a first time when a first voltage is induced in the first stator coil and determines a second time when a second voltage is induced in the second stator coil after the first voltage is induced. The detection module determines a speed of the rotor based on a difference between the first and second time. The power control module applies current through the second stator coil a predetermined period after the second time. The power control module determines the predetermined period based on the speed of the rotor.
摘要翻译：电机控制系统包括电源控制模块和检测模块。功率控制模块控制施加到电动机的第一和第二定子线圈的电力以使转子旋转。当转子旋转时，转子在第一和第二定子线圈中感应电压。检测模块确定在第一定子线圈中感应出第一电压的第一次，并且在第一电压被感应之后确定在第二定子线圈中感应到第二电压的第二时间。检测模块基于第一次和第二次之间的差异来确定转子的速度。功率控制模块在第二时间之后的预定时间段内通过第二定子线圈施加电流。功率控制模块基于转子的速度来确定预定周期。

7. 发明申请

US20100134055A1 MOTOR SPEED CONTROL SYSTEM AND METHOD WITHOUT PULSE-WIDTH MODULATION 有权
标题翻译：电机速度控制系统和无脉冲调制的方法
公开(公告)号：US20100134055A1
公开(公告)日：2010-06-03
申请号：US12480161
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： H02P23/14 , H02P6/18
CPC分类号： H02P6/182 , H02P6/08
摘要： A motor control system includes a power control module and a detection module. The power control module controls power applied to first and second stator coils of a motor to rotate a rotor. The rotor induces voltages in the first and second stator coils when the rotor is rotating. The detection module determines a first time when a first voltage is induced in the first stator coil and determines a second time when a second voltage is induced in the second stator coil after the first voltage is induced. The detection module determines a speed of the rotor based on a difference between the first and second time. The power control module applies current through the second stator coil a predetermined period after the second time. The power control module determines the predetermined period based on the speed of the rotor.
摘要翻译：电机控制系统包括电源控制模块和检测模块。功率控制模块控制施加到电动机的第一和第二定子线圈的电力以使转子旋转。当转子旋转时，转子在第一和第二定子线圈中感应电压。检测模块确定在第一定子线圈中感应出第一电压的第一次，并且在第一电压被感应之后确定在第二定子线圈中感应到第二电压的第二时间。检测模块基于第一次和第二次之间的差异来确定转子的速度。功率控制模块在第二时间之后的预定时间段内通过第二定子线圈施加电流。功率控制模块基于转子的速度来确定预定周期。

8. 发明授权

US07453221B1 System for controlling rotation of a disk drive 有权
标题翻译：用于控制磁盘驱动器旋转的系统
公开(公告)号：US07453221B1
公开(公告)日：2008-11-18
申请号：US11546600
申请日：2006-10-11
申请人： Kuno Shinichiro , Ravishanker Krishnamoorthy , Foo Leng Leong , Cheng Yong Teoh
发明人： Kuno Shinichiro , Ravishanker Krishnamoorthy , Foo Leng Leong , Cheng Yong Teoh
IPC分类号： H02P6/20 , H02P6/24
CPC分类号： H02P6/08
摘要： A disk drive system is set forth that comprises a rotatable storage medium adapted to store data, a spindle motor disposed to rotate the rotatable storage medium, and a spindle motor control system. The spindle motor control system brakes rotation of the spindle motor in response to inductive sensing of the rotation of the spindle motor.
摘要翻译：提出了包括适于存储数据的可旋转存储介质的磁盘驱动器系统，设置成旋转可旋转存储介质的主轴电机以及主轴电机控制系统。主轴电机控制系统响应于主轴电动机的旋转的感应感应来制动主轴电机的旋转。

9. 发明授权

US07274162B1 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：US07274162B1
公开(公告)日：2007-09-25
申请号：US11347543
申请日：2006-02-03
申请人： Ravishanker Krishnamoorthy , Foo Leng Leong
发明人： Ravishanker Krishnamoorthy , Foo Leng Leong
IPC分类号： H02P7/06
CPC分类号： H02P6/182 , H02P6/157
摘要： In a motor having a number of poles that have nominally equiangularly-spaced positions that in fact deviate from those positions, the actual pole positions are determined by measuring the periods between zero-crossings of the back-EMF generated during pole-pair interactions. The ratios of the various pole periods can then be computed, and the motor drive current can be adjusted for each pole by applying the respective ratio to a base current value determined from the desired motor speed.
摘要翻译：在具有实际上偏离这些位置的名义上等角间隔位置的多个极的电动机中，通过测量在极对相互作用期间产生的反电动势的过零点之间的周期来确定实际磁极位置。然后可以计算各极点的比率，并且可以通过将相应的比率应用到从期望的电动机速度确定的基准电流值来调节每个极的电动机驱动电流。

10. 发明授权

US08405332B1 Method to eliminate current surge during spindle spin up 有权
标题翻译：在主轴旋转时消除电流浪涌的方法
公开(公告)号：US08405332B1
公开(公告)日：2013-03-26
申请号：US12705444
申请日：2010-02-12
申请人： Ravishanker Krishnamoorthy , Foo Leng Leong
发明人： Ravishanker Krishnamoorthy , Foo Leng Leong
IPC分类号： H02H7/09
CPC分类号： H02P6/002 , H02P6/08 , H02P6/28 , H02P23/20
摘要： Systems, methods and computer program products for reducing or removing current spikes generated during a current recirculation period associated with phase switching in a spindle motor are described. In some implementations, the duty cycle of the drive signals applied to the windings of the spindle motor can be adjusted to reduce or eliminate the current surge resulting from current recirculation. In some implementations, the duty cycle of the drive signals during spin-up can be reduced based on a current limit, and the reduced duty cycle can then be used to drive the spindle motor taking into account of current surges in the supply current.
摘要翻译：描述了用于减少或消除与主轴电机中的相位切换相关的当前再循环期间产生的电流尖峰的系统，方法和计算机程序产品。在一些实施方案中，可以调整施加到主轴电动机的绕组的驱动信号的占空比以减少或消除由电流再循环产生的电流浪涌。在一些实施方案中，可以基于电流限制来减小启动期间的驱动信号的占空比，并且然后可以使用减小的占空比来考虑电源电流中的电流浪涌来驱动主轴电动机。

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