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1. 发明授权

US06549359B1 Disk drive comprising spin down circuitry having a current limit circuit for enhancing power and braking control 有权
标题翻译：磁盘驱动器包括具有用于增强功率和制动控制的限流电路的降压电路
公开(公告)号：US06549359B1
公开(公告)日：2003-04-15
申请号：US09585805
申请日：2000-05-31
申请人： George J. Bennett , Robert P. Ryan
发明人： George J. Bennett , Robert P. Ryan
IPC分类号： G11B1518
CPC分类号： G11B19/22 , G11B5/54
摘要： A disk drive is disclosed comprising a disk, a head actuated radially over the disk, and a spindle motor for rotating the disk, the spindle motor comprising a plurality of windings and a rotor rotatable at a variable spin rate, wherein the rotor generates a back EMF (BEMF) voltage across the windings proportional to the spin rate of the rotor. A plurality of switching elements are coupled to the windings, and switch control logic generates switch control signals applied to the switching elements for commutating the spindle motor during normal operation and for generating an internal supply voltage from the BEMF during a spin down mode, the internal supply voltage for parking the head. A signal generator generates a periodic signal, the periodic signal for periodically grounding the windings during the spin down mode in order to boost the internal supply voltage, wherein grounding the windings applies a braking torque to the spindle motor. A plurality of current detectors is provided, wherein each current detector for measuring a current flowing through a respective one of the switching elements. A current limit circuit generates a control signal which prevents the periodic signal from grounding the windings if the current flowing through any one of the switching elements exceeds a predetermined threshold.
摘要翻译：公开了一种磁盘驱动器，其包括盘，位于盘上径向驱动的磁头和用于旋转磁盘的主轴电机，主轴电动机包括多个绕组和可旋转的可转动速度的转子，其中转子产生一个后部绕组的EMF（BEMF）电压与转子的旋转速率成比例。多个开关元件耦合到绕组，并且开关控制逻辑产生施加到开关元件的开关控制信号，用于在正常操作期间使主轴电机换向，并且在旋转下降模式期间产生来自BEMF的内部电源电压，内部供电电压停放头。信号发生器产生周期信号，周期信号用于在下降模式期间周期性地接地绕组，以便提升内部电源电压，其中绕组接地对主轴电机施加制动转矩。提供多个电流检测器，其中每个电流检测器用于测量流过相应的一个开关元件的电流。如果流过任何一个开关元件的电流超过预定阈值，则限流电路产生控制信号，该控制信号防止周期信号接地绕组。

2. 发明申请

US20130070363A1 SYSTEMS AND METHODS FOR DATA THROTTLING DURING DISK DRIVE POWER DOWN 有权
标题翻译：磁盘驱动器断电时数据转速的系统和方法
公开(公告)号：US20130070363A1
公开(公告)日：2013-03-21
申请号：US13239176
申请日：2011-09-21
申请人： George J. Bennett , Steven R. Vasquez , Robert P. Ryan
发明人： George J. Bennett , Steven R. Vasquez , Robert P. Ryan
IPC分类号： G11B15/48
CPC分类号： G06F11/0727 , G11B19/041 , G11B19/2063 , G11B19/2081 , G11B2220/2516 , G11B2220/45 , G11B2220/63
摘要： Some embodiments of the invention are directed to a data storage system that includes a disk and solid-state non-volatile memory (NVM). During a power failure, the data storage system may use back EMF (BEMF) voltage from the spindle motor of the disk to park the heads of the disk and/or store data in the NVM. In one embodiment, a demand regulation circuit regulates loads that use voltage generated from the BEMF. The demand regulation circuit may be used to selectively cause a controller to adjust the rate of programming to the NVM in order to reduce the load. For example, the demand regulation circuit may assert a throttle signal to the controller upon detecting that the voltage generated from the BEMF is below a certain threshold. Programming rate may be throttled, programming cycles may be staggered, and/or programming time may be lengthened. Throttling may enable the use of smaller circuitry.
摘要翻译：本发明的一些实施例涉及包括盘和固态非易失性存储器（NVM）的数据存储系统。在电源故障期间，数据存储系统可以使用来自磁盘的主轴电机的反电动势（BEMF）电压来停放磁盘头和/或将数据存储在NVM中。在一个实施例中，需求调节电路调节使用从BEMF产生的电压的负载。可以使用需求调节电路来选择性地使控制器调整对NVM的编程速率，以便减少负载。例如，当检测到从BEMF产生的电压低于某个阈值时，需求调节电路可以向控制器断言油门信号。编程速率可能会被限制，编程周期可能会交错，和/或编程时间可能会延长。节流可以使用更小的电路。

3. 发明授权

US06970319B1 Disk drive comprising a pulse width modulated demand limit circuit for enhancing power management during spin-down 有权
标题翻译：磁盘驱动器包括用于在减速期间增强功率管理的脉宽调制需求限制电路
公开(公告)号：US06970319B1
公开(公告)日：2005-11-29
申请号：US10446885
申请日：2003-05-27
申请人： George J. Bennett , Robert P. Ryan
发明人： George J. Bennett , Robert P. Ryan
IPC分类号： G11B5/54 , G11B21/02
CPC分类号： G11B5/54
摘要： A disk drive is disclosed comprising a head, a disk and a spindle motor for rotating the disk. An internal supply voltage is generated from a back EMF (BEMF) voltage across the windings of the spindle motor. The internal supply voltage is applied to a voice coil motor for use in parking the head during a spin-down mode. The internal supply voltage is compared to a threshold in order to activate a demand limit control signal. A periodic signal periodically disconnects the internal supply voltage from the VCM while the demand limit control signal is active.
摘要翻译：公开了一种磁盘驱动器，其包括用于旋转磁盘的磁头，磁盘和主轴电动机。内部电源电压是由主轴电机绕组的反电动势（BEMF）电压产生的。内部电源电压被施加到音圈电机，用于在旋转模式下停放头部。将内部电源电压与阈值进行比较，以激活需求限制控制信号。当需求限制控制信号有效时，周期性信号会周期性地断开内部电源电压与VCM的连接。

4. 发明授权

US06549361B1 Disk drive comprising spin down circuitry having a power clamp circuit for enhancing power and braking control 有权
标题翻译：磁盘驱动器包括具有用于增强功率和制动控制的功率钳位电路的降压电路
公开(公告)号：US06549361B1
公开(公告)日：2003-04-15
申请号：US09552400
申请日：2000-04-19
申请人： George J. Bennett , Robert P. Ryan
发明人： George J. Bennett , Robert P. Ryan
IPC分类号： G11B2102
CPC分类号： G11B19/22 , G11B5/54
摘要： A disk drive is disclosed comprising a disk, a head actuated radially over the disk, and a spindle motor for rotating the disk, the spindle motor comprising a plurality of windings and a rotor rotatable at a variable spin rate, wherein the rotor generates a back EMF (BEMF) voltage across the windings proportional to the spin rate of the rotor. A plurality of switching elements are coupled to the windings, and switch control logic generates switch control signals applied to the switching elements for commutating the spindle motor during normal operation and for generating an internal supply voltage from the BEMF during a spin down mode, the internal supply voltage for parking the head. A signal generator generates a periodic signal, the periodic signal for periodically grounding the windings during the spin down mode in order to boost the internal supply voltage, wherein grounding the windings applies a braking torque to the spindle motor. A power clamp circuit clamps the internal supply voltage to a predetermined level to protect against an over-voltage condition without disabling the braking torque applied to the spindle motor.
摘要翻译：公开了一种磁盘驱动器，其包括盘，位于盘上径向驱动的磁头和用于旋转磁盘的主轴电机，主轴电动机包括多个绕组和可旋转的可转动速度的转子，其中转子产生一个后部绕组的EMF（BEMF）电压与转子的旋转速率成比例。多个开关元件耦合到绕组，并且开关控制逻辑产生施加到开关元件的开关控制信号，用于在正常操作期间使主轴电机换向，并且在旋转下降模式期间产生来自BEMF的内部电源电压，内部供电电压停放头。信号发生器产生周期信号，周期信号用于在下降模式期间周期性地接地绕组，以便提升内部电源电压，其中绕组接地对主轴电机施加制动转矩。功率钳位电路将内部电源电压钳位到预定的电平以防止过压状态，而不会使施加到主轴电动机的制动转矩失效。

5. 发明授权

US06574062B1 Disk drive comprising a demand limit circuit for enhancing power management during spin down 有权
标题翻译：磁盘驱动器包括用于在旋转下降期间增强功率管理的需求限制电路
公开(公告)号：US06574062B1
公开(公告)日：2003-06-03
申请号：US09552403
申请日：2000-04-19
申请人： George J. Bennett , Robert P. Ryan
发明人： George J. Bennett , Robert P. Ryan
IPC分类号： G11B1902
CPC分类号： G11B19/20
摘要： A disk drive is disclosed comprising a disk, a head, a voice coil motor (VCM) for actuating the head radially over the disk (the VCM having a voltage control input), and a spindle motor for rotating the disk, the spindle motor comprising a plurality of windings and a rotor rotatable at a variable spin rate wherein the rotor generates a back EMF (BEMF) voltage across the windings proportional to the spin rate of the rotor. A plurality of switching elements are coupled to the windings, and switch control logic generates switch control signals applied to the switching elements for commutating the spindle motor during normal operation and for generating an internal supply voltage Vi from the BEMF during a spin down mode, the internal supply voltage Vi applied to the voltage control input of the VCM for parking the head. A demand limit circuit disconnects the internal supply voltage Vi from the voltage control input of the VCM when the internal supply voltage Vi falls below a predetermined level, and reconnects the internal supply voltage Vi to the voltage control input of the VCM once the internal supply voltage Vi recharges to a predetermined level, thereby enhancing power management during the spin down mode.
摘要翻译：公开了一种磁盘驱动器，其包括用于在磁盘上径向驱动磁头（具有电压控制输入的VCM）的磁盘，磁头，音圈电机（VCM）和用于旋转磁盘的主轴电机，主轴电动机包括多个绕组和以可变旋转速度旋转的转子，其中转子产生与转子的旋转速率成比例的绕组的反电动势（BEMF）电压。多个开关元件耦合到绕组，并且开关控制逻辑产生施加到开关元件的开关控制信号，用于在正常操作期间使主轴电机换向，并且在旋转下降模式期间从BEMF产生内部电源电压Vi，内部电源电压Vi施加到VCM的电压控制输入端，用于停放头部。当内部电源电压Vi低于预定电平时，需求限制电路将内部电源电压Vi与VCM的电压控制输入断开，一旦内部电源电压就将内部电源电压Vi重新连接到VCM的电压控制输入 Vi充电到预定水平，从而在旋转模式下增强功率管理。

6. 发明授权

US08630054B2 Systems and methods for data throttling during disk drive power down 有权
标题翻译：在磁盘驱动器断电期间数据限制的系统和方法
公开(公告)号：US08630054B2
公开(公告)日：2014-01-14
申请号：US13239176
申请日：2011-09-21
申请人： George J. Bennett , Steven R. Vasquez , Robert P. Ryan
发明人： George J. Bennett , Steven R. Vasquez , Robert P. Ryan
IPC分类号： G11B15/46
CPC分类号： G06F11/0727 , G11B19/041 , G11B19/2063 , G11B19/2081 , G11B2220/2516 , G11B2220/45 , G11B2220/63
摘要： Some embodiments of the invention are directed to a data storage system that includes a disk and solid-state non-volatile memory (NVM). During a power failure, the data storage system may use back EMF (BEMF) voltage from the spindle motor of the disk to park the heads of the disk and/or store data in the NVM. In one embodiment, a demand regulation circuit regulates loads that use voltage generated from the BEMF. The demand regulation circuit may be used to selectively cause a controller to adjust the rate of programming to the NVM in order to reduce the load. For example, the demand regulation circuit may assert a throttle signal to the controller upon detecting that the voltage generated from the BEMF is below a certain threshold. Programming rate may be throttled, programming cycles may be staggered, and/or programming time may be lengthened. Throttling may enable the use of smaller circuitry.
摘要翻译：本发明的一些实施例涉及包括盘和固态非易失性存储器（NVM）的数据存储系统。在电源故障期间，数据存储系统可以使用来自磁盘的主轴电机的反电动势（BEMF）电压来停放磁盘头和/或将数据存储在NVM中。在一个实施例中，需求调节电路调节使用从BEMF产生的电压的负载。可以使用需求调节电路来选择性地使控制器调整对NVM的编程速率，以便减少负载。例如，当检测到从BEMF产生的电压低于某个阈值时，需求调节电路可以向控制器断言油门信号。编程速率可能会被限制，编程周期可能会交错，和/或编程时间可能会延长。节流可以使用更小的电路。

7. 发明授权

US06967458B1 Decreasing spin up time in a disk drive by adjusting a duty cycle of a spindle motor PWM signal to maintain constant average input current 有权
标题翻译：通过调整主轴电机PWM信号的占空比来减小磁盘驱动器中的启动时间，以保持恒定的平均输入电流
公开(公告)号：US06967458B1
公开(公告)日：2005-11-22
申请号：US10210399
申请日：2002-07-31
申请人： George J. Bennett , Robert P. Ryan
发明人： George J. Bennett , Robert P. Ryan
IPC分类号： G05B11/28 , G11B19/20
CPC分类号： G11B19/20 , G05B11/28
摘要： A disk drive is disclosed comprising a spindle motor for rotating a disk, wherein the current applied to the spindle motor is controlled by adjusting a duty cycle of a pulse width modulated (PWM) signal. A current sensor generates a current sense signal representing a current flowing from a supply voltage. The current sense signal is integrated to generate an integration signal. The integration signal is compared to a threshold, and the result of the comparison is used to adjust the duty cycle of the PWM signal. In this manner the disk drive draws essentially constant average input current from the supply voltage which decreases the spin up time of the disk.
摘要翻译：公开了一种磁盘驱动器，其包括用于旋转盘的主轴电机，其中通过调整脉宽调制（PWM）信号的占空比来控制施加到主轴电动机的电流。电流传感器产生表示从电源电压流出的电流的电流感测信号。电流感测信号被积分以产生积分信号。积分信号与阈值进行比较，比较结果用于调整PWM信号的占空比。以这种方式，磁盘驱动器从电源电压中获取基本上恒定的平均输入电流，这降低了磁盘的旋转上升时间。

8. 发明授权

US06577465B1 Disk drive comprising spin down circuitry having a programmable signal generator for enhancing power and braking control 有权
标题翻译：包括具有用于增强功率和制动控制的可编程信号发生器的旋转下降电路的磁盘驱动器
公开(公告)号：US06577465B1
公开(公告)日：2003-06-10
申请号：US09585244
申请日：2000-05-31
申请人： George J. Bennett , Robert P. Ryan
发明人： George J. Bennett , Robert P. Ryan
IPC分类号： G11B1518
CPC分类号： G11B19/22 , G11B5/54
摘要： A disk drive is disclosed comprising a disk, a head actuated radially over the disk, and a spindle motor for rotating the disk, the spindle motor comprising a plurality of windings and a rotor rotatable at a variable spin rate, wherein the rotor generates a back EMF (BEMF) voltage across the windings proportional to the spin rate of the rotor. A plurality of switching elements are coupled to the windings, and switch control logic generates switch control signals applied to the switching elements for commutating the spindle motor during normal operation and for generating an internal supply voltage from the BEMF during a spin down mode, the internal supply voltage for parking the head. A programmable signal generator generates a periodic signal, the periodic signal for periodically grounding the windings during the spin down mode in order to boost the internal supply voltage, wherein grounding the windings applies a braking torque to the spindle motor. A programmable register is provided for storing a digital value for adjusting a frequency characteristic of the periodic signal, thereby enhancing power management.
摘要翻译：公开了一种磁盘驱动器，其包括盘，位于盘上径向驱动的磁头和用于旋转磁盘的主轴电机，主轴电动机包括多个绕组和可旋转的可转动速度的转子，其中转子产生一个后部绕组的EMF（BEMF）电压与转子的旋转速率成比例。多个开关元件耦合到绕组，并且开关控制逻辑产生施加到开关元件的开关控制信号，用于在正常操作期间使主轴电机换向，并且在旋转下降模式期间产生来自BEMF的内部电源电压，内部供电电压停放头。可编程信号发生器产生周期性信号，周期信号用于在下降模式期间周期性地接地绕组，以便提升内部电源电压，其中绕组接地对主轴电机施加制动转矩。提供了可编程寄存器，用于存储用于调整周期信号的频率特性的数字值，从而增强电源管理。

9. 发明授权

US08610391B1 Disk drive optimizing spindle motor torque by adjusting leading phase angle during spin-up 有权
标题翻译：磁盘驱动优化主轴电机转矩，通过调整起动期间的相位角
公开(公告)号：US08610391B1
公开(公告)日：2013-12-17
申请号：US13172719
申请日：2011-06-29
申请人： Wenli Yang , Philip Tin Yue Ng , Ashok K. Desai , Robert P. Ryan
发明人： Wenli Yang , Philip Tin Yue Ng , Ashok K. Desai , Robert P. Ryan
IPC分类号： H02K21/00 , H02K23/00
CPC分类号： H02P6/22 , H02P6/08 , H02P6/182
摘要： A disk drive is disclosed comprising a head actuated over a disk, and a spindle motor for rotating the disk, the spindle motor comprising a plurality of windings. During a spin-up operation a sinusoidal driving voltage is applied to each winding of the spindle motor. A back electromotive force (BEMF) voltage generated by at least one of the windings is measured, and a rotation speed of the spindle motor is measured. The sinusoidal driving voltage is adjusted in order to optimize a lead angle relative to the rotation speed, wherein the lead angle represents a degree the sinusoidal driving voltage leads the BEMF voltage.
摘要翻译：公开了一种磁盘驱动器，包括在盘上驱动的磁头和用于旋转磁盘的主轴电机，主轴电动机包括多个绕组。在起动操作期间，正弦驱动电压被施加到主轴电动机的每个绕组。测量由至少一个绕组产生的反电动势（BEMF）电压，并且测量主轴电动机的转速。调整正弦驱动电压以便相对于转速优化引导角，其中引导角表示正弦驱动电压引导BEMF电压的程度。

10. 发明授权

US07907364B2 Disk drive including a delay circuit to provide a delayed reset signal 有权
标题翻译：磁盘驱动器包括延迟电路以提供延迟复位信号
公开(公告)号：US07907364B2
公开(公告)日：2011-03-15
申请号：US12201571
申请日：2008-08-29
申请人： William B. Boyle , Robert P. Ryan
发明人： William B. Boyle , Robert P. Ryan
IPC分类号： G11B19/04 , G11B15/08 , G11B21/02
CPC分类号： G11B5/09
摘要： A disk drive including a delay circuit to provide a delayed reset signal is disclosed. The disk drive includes a head to perform write and read operations to and from a disk and a disk controller that is coupled to the head to control the write and read operations performed by the head. The disk drive further includes: a power loss detection circuit to detect a power loss and to generate a reset signal in response to the power loss; a reset power line coupled to the disk controller and the power loss detection circuit to provide a non-delayed reset signal to the disk controller; and a delay circuit coupled to the reset power line wherein the delay circuit delays the reset signal to provide a delayed reset signal.
摘要翻译：公开了一种包括提供延迟复位信号的延迟电路的磁盘驱动器。磁盘驱动器包括用于对磁盘执行写入和读取操作的磁头以及耦合到磁头的磁盘控制器，以控制由磁头执行的写入和读取操作。磁盘驱动器还包括：功率损耗检测电路，用于检测功率损耗并响应于功率损耗产生复位信号; 耦合到盘控制器和功率损耗检测电路的复位电源线，以向盘控制器提供未延迟的复位信号; 以及耦合到所述复位电源线的延迟电路，其中所述延迟电路延迟所述复位信号以提供延迟的复位信号。

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