公开(公告)号：US20110127939A1

公开(公告)日：2011-06-02

申请号：US13016705

申请日：2011-01-28

Applicant: Frederic Bonvin

Inventor： Frederic Bonvin

IPC: H02P6/18

CPC classification number: G11B19/24

Abstract: Disk drive spindle jitter is comprised of electrical noise, error due to pair pole asymmetry, and random disk speed variances. Error caused by pair pole asymmetry can be identified and compensated for by detecting over a single rotation of a rotor a plurality of zero cross signals. These signals can be statistically analyzed over a period of a plurality of revolutions of the rotor so as to identify the systematic error caused by pair poles. Once identified, this pair pole error can be used to modify zero cross signals and/or modify commutation signal driving the disk so as to arrive at a more accurate determination of disk speed and to precisely control the speed of the disk.

Abstract translation: 磁盘驱动器主轴抖动由电噪声，由于对极不对称引起的误差和随机磁盘速度方差组成。 可以通过检测转子的单个旋转多个零交叉信号来识别和补偿由配对极不对称引起的误差。 这些信号可以在转子的多圈周期内进行统计分析，以便识别由双极引起的系统误差。 一旦识别出来，该对极点误差可用于修改零交叉信号和/或修改驱动磁盘的换向信号，以便更准确地确定磁盘速度并精确控制磁盘的速度。

公开(公告)号：US09391544B2

公开(公告)日：2016-07-12

申请号：US12620929

申请日：2009-11-18

Applicant: Frederic Bonvin

Inventor： Frederic Bonvin

IPC: H02P6/14 ,  H02P3/14 ,  H02P3/22 ,  H02M7/5388 ,  H02P6/08 ,  H02P7/29 ,  H02P7/18 ,  G05F1/00

CPC classification number: H02P3/22 ,  G11B19/20 ,  H02M7/5388 ,  H02P6/085

Abstract: A drive circuit having asymmetrical drivers. In an embodiment, a brushless DC motor may be driven by a drive circuit having three high-side MOSFETs and three low-side MOSFETs. A driver controller turns the MOSFETs on and off according to a drive algorithm such that phase currents are injected into motor coils to be driven. The high-side MOSFETs may be sized differently than the low-side MOSFETs. As such, when a MacDonald waveform (or similar drive algorithm) is used to drive the phases of the motor, less power may be required during disk spin-up because the MOSFETs that are on more (e.g., the low-side MOSFETs with a MacDonald waveform) may be sized larger than the MOSFETs that are on less (e.g., the high-side MOSFETs). In this manner, less power is dissipated in the larger size MOSFETs that are on more than the others.

Abstract translation: 具有不对称驱动器的驱动电路。 在一个实施例中，无刷直流电动机可以由具有三个高边MOSFET和三个低边MOSFET的驱动电路驱动。 驱动器控制器根据驱动算法开启和关闭MOSFET，使得相电流被注入要驱动的电机线圈中。 高端MOSFET的尺寸可能与低端MOSFET的尺寸不同。 因此，当MacDonald波形（或类似的驱动算法）用于驱动电动机的相位时，由于更多的MOSFET（例如，具有一个或多个）的低端MOSFET，因此在磁盘启动期间可能需要更少的功率 麦克唐纳波形）的尺寸可能大于较少的MOSFET（例如高边MOSFET）。 以这种方式，在比其他MOSFET更大的MOSFET中消耗更少的功率。

公开(公告)号：US20080180047A1

公开(公告)日：2008-07-31

申请号：US12020319

申请日：2008-01-25

Applicant: Frederic Bonvin

Inventor： Frederic Bonvin

IPC: H02P6/08 ,  H02P6/18

CPC classification number: G11B19/24

Abstract: Disk drive spindle jitter is comprised of electrical noise, error due to pair pole asymmetry, and random disk speed variances. Error caused by pair pole asymmetry can be identified and compensated for by detecting over a single rotation of a rotor a plurality of zero cross signals. These signals can be statistically analyzed over a period of a plurality of revolutions of the rotor so as to identify the systematic error caused by pair poles. Once identified, this pair pole error can be used to modify zero cross signals and/or modify commutation signal driving the disk so as to arrive at a more accurate determination of disk speed and to precisely control the speed of the disk.

Abstract translation: 磁盘驱动器主轴抖动由电噪声，由于对极不对称引起的误差和随机磁盘速度方差组成。 可以通过检测转子的单个旋转多个零交叉信号来识别和补偿由配对极不对称引起的误差。 这些信号可以在转子的多圈周期内进行统计分析，以便识别由双极引起的系统误差。 一旦识别出来，该对极点误差可用于修改零交叉信号和/或修改驱动磁盘的换向信号，以便更准确地确定磁盘速度并精确控制磁盘的速度。

公开(公告)号：US20120112681A1

公开(公告)日：2012-05-10

申请号：US12940438

申请日：2010-11-05

Applicant: Frederic Bonvin ,  Diego Armaroli

Inventor： Frederic Bonvin ,  Diego Armaroli

IPC: H02P1/04

CPC classification number: G11B19/28

Abstract: Techniques and apparatus for limiting the current through a motor, such as a motor for rotating a rotatable element of a hard drive. The current can be limited based on a threshold. A first threshold value can be set for a first time period. A second threshold value can be set for a second time period in which the current through the motor rises. The second threshold value is lower than the first threshold value. A spike in the supply current upon accelerating the rotatable element of the motor can thereby be reduced or eliminated.

Abstract translation: 用于限制通过马达的电流的技术和装置，例如用于旋转硬盘驱动器的可旋转元件的马达。 可以根据阈值限制电流。 可以在第一时间段内设置第一阈值。 可以在其中通过电动机的电流上升的第二时间段设置第二阈值。 第二阈值低于第一阈值。 因此，可以减少或消除在加速电动机的可旋转元件时的供电电流的尖峰。

公开(公告)号：US07893643B2

公开(公告)日：2011-02-22

申请号：US12020319

申请日：2008-01-25

Applicant: Frederic Bonvin

Inventor： Frederic Bonvin

IPC: H02P6/06 ,  G11B7/00

CPC classification number: G11B19/24

Abstract: Disk drive spindle jitter is comprised of electrical noise, error due to pair pole asymmetry, and random disk speed variances. Error caused by pair pole asymmetry can be identified and compensated for by detecting over a single rotation of a rotor a plurality of zero cross signals. These signals can be statistically analyzed over a period of a plurality of revolutions of the rotor so as to identify the systematic error caused by pair poles. Once identified, this pair pole error can be used to modify zero cross signals and/or modify commutation signal driving the disk so as to arrive at a more accurate determination of disk speed and to precisely control the speed of the disk.

Abstract translation: 磁盘驱动器主轴抖动由电噪声，由于对极不对称引起的误差和随机磁盘速度方差组成。 可以通过检测转子的单个旋转多个零交叉信号来识别和补偿由配对极不对称引起的误差。 这些信号可以在转子的多圈周期内进行统计分析，以便识别由双极引起的系统误差。 一旦识别出来，该对极点误差可用于修改零交叉信号和/或修改驱动磁盘的换向信号，以便更准确地确定磁盘速度并精确控制磁盘的速度。

公开(公告)号：US08749183B2

公开(公告)日：2014-06-10

申请号：US12552963

申请日：2009-09-02

Applicant: Frederic Bonvin ,  Agostino Mirabelli ,  Maurizio Nessi

Inventor： Frederic Bonvin ,  Agostino Mirabelli ,  Maurizio Nessi

IPC: H02P6/16 ,  H02P6/18

CPC classification number: H02P6/10 ,  G11B19/20 ,  H02P6/085 ,  H02P6/18

Abstract: An embodiment of a motor controller includes first and second supply nodes, a motor-coil node, an isolator, a motor driver, and a motor position signal generator. The isolator is coupled between the first and second supply nodes, and the motor driver is coupled to the second supply node and to the motor-coil node. The motor position signal generator is coupled to the isolator and is operable to generate, in response to the isolator, a motor-position signal that is related to a position of a motor having at least one coil coupled to the motor-coil node. By generating the motor-position signal in response to the isolator, the motor controller or another circuit may determine the at-rest or low-speed position of a motor without using an external coil-current-sense circuit.

Abstract translation: 电动机控制器的实施例包括第一和第二供电节点，电动机线圈节点，隔离器，电动机驱动器和电动机位置信号发生器。 隔离器耦合在第一和第二电源节点之间，电动机驱动器耦合到第二电源节点和电动机线圈节点。 电动机位置信号发生器耦合到隔离器并且可操作以响应于隔离器产生与具有耦合到电动机线圈节点的至少一个线圈的电动机的位置有关的电动机位置信号。 通过响应于隔离器产生电动机位置信号，电动机控制器或另一电路可以在不使用外部线圈电流检测电路的情况下确定电动机的静止或低速位置。

公开(公告)号：US08471509B2

公开(公告)日：2013-06-25

申请号：US12505822

申请日：2009-07-20

Applicant: Frederic Bonvin

Inventor： Frederic Bonvin

IPC: H02P6/08

CPC classification number: G11B19/047 ,  G11B5/54 ,  G11B21/12

Abstract: An embodiment of a circuit for maintaining voltage at a voltage bus after a power loss in a hard disk drive system. HDD systems may suddenly lose power and specific tasks, such as parking the read/write head and storing state data may be accomplished using a power generated from back EMF of a motor that is still turning. During the power loss sequence, a drive controller may drive a power chipset to regulate the voltage at a voltage bus so as to conserve power as much as possible. In this manner, the drive circuit may regulate the voltage via a drive algorithm to be just above a threshold voltage (typically 4.4 V) while the HDD system is storing state data, but apply other algorithm for other situations, such as parking the read/write head. Various drive algorithms may be tailored to provide a specific sequence of voltage bus regulation techniques suited to specific applications.

Abstract translation: 用于在硬盘驱动器系统中的功率损耗之后维持电压总线处的电压的电路的实施例。 HDD系统可能突然失去功率，并且可以使用从仍然转动的电动机的反电动势产生的功率来实现诸如停止读/写头和存储状态数据的特定任务。 在断电顺序期间，驱动控制器可以驱动电源芯片组来调节电压总线上的电压，以尽可能地节省功率。 以这种方式，驱动电路可以通过驱动算法将电压调节为刚刚高于阈值电压（通常为4.4V），而HDD系统正在存储状态数据，但是对其他情况应用其他算法，例如停止读/ 写头 可以调整各种驱动算法以提供适合特定应用的电压总线调节技术的特定顺序。

公开(公告)号：US08878475B2

公开(公告)日：2014-11-04

申请号：US12940438

申请日：2010-11-05

Applicant: Frederic Bonvin ,  Diego Armaroli

Inventor： Frederic Bonvin ,  Diego Armaroli

IPC: H02H7/09 ,  G11B19/28

CPC classification number: G11B19/28

Abstract: Techniques and apparatus for limiting the current through a motor, such as a motor for rotating a rotatable element of a hard drive. The current can be limited based on a threshold. A first threshold value can be set for a first time period. A second threshold value can be set for a second time period in which the current through the motor rises. The second threshold value is lower than the first threshold value. A spike in the supply current upon accelerating the rotatable element of the motor can thereby be reduced or eliminated.

Abstract translation: 用于限制通过马达的电流的技术和装置，例如用于旋转硬盘驱动器的可旋转元件的马达。 可以根据阈值限制电流。 可以在第一时间段内设置第一阈值。 可以在其中通过电动机的电流上升的第二时间段设置第二阈值。 第二阈值低于第一阈值。 因此，可以减少或消除在加速电动机的可旋转元件时的供电电流的尖峰。

公开(公告)号：US08754602B2

公开(公告)日：2014-06-17

申请号：US12552989

申请日：2009-09-02

Applicant: Frederic Bonvin ,  Ezio Galbiati

Inventor： Frederic Bonvin ,  Ezio Galbiati

IPC: H02P6/10

CPC classification number: H02P6/10 ,  G11B19/20 ,  H02P6/085 ,  H02P6/18

Abstract: An embodiment of a motor controller includes a motor driver and a signal conditioner. The motor driver is configured to generate a motor-coil drive signal having a first component at a first frequency, and the signal conditioner is coupled to the motor driver and is configured to alter the first component. For example, if the first component of the motor-coil drive signal causes the motor to audibly vibrate (e.g., “whine”), then the signal conditioner may alter the amplitude or phase of the first component to reduce the vibration noise to below a threshold level.

Abstract translation: 马达控制器的实施例包括马达驱动器和信号调节器。 电动机驱动器被配置为产生具有第一频率的第一分量的电动机线圈驱动信号，并且信号调节器耦合到电动机驱动器并且被配置为改变第一分量。 例如，如果电动机线圈驱动信号的第一分量使得电动机听起来振动（例如，“呜呜”），则信号调节器可以改变第一组件的幅度或相位，以将振动噪声降低到低于 门限等级。

公开(公告)号：US08704479B2

公开(公告)日：2014-04-22

申请号：US12941366

申请日：2010-11-08

Applicant: Frederic Bonvin ,  Davide Betta ,  Agostino Mirabelli ,  Andrea Di Ruzza

Inventor： Frederic Bonvin ,  Davide Betta ,  Agostino Mirabelli ,  Andrea Di Ruzza

IPC: H02P6/00

CPC classification number: H02P6/185

Abstract: A system and method for determining the start position of a motor. According to an embodiment, a voltage pulse signal may be generated across a pair of windings in a motor. A current response signal will be generated and based upon the position of the motor, the response signal will be greater in one pulse signal polarity as opposed to an opposite pulse signal polarity. The response signal may be compared for s specific duration of time or until a specific integration threshold has been reached. Further, the response signal may be converted into a digital signal such that a sigma-delta circuit may smooth out glitches more easily. In this manner, the position of the motor may be determined to within 60 electrical degrees during a startup.

Abstract translation: 一种用于确定电动机的起始位置的系统和方法。 根据实施例，电动机中的一对绕组可以产生电压脉冲信号。 将产生电流响应信号并且基于电动机的位置，与一个相反的脉冲信号极性相反，一个脉冲信号极性中的响应信号将更大。 响应信号可以在特定持续时间或直到达到特定积分阈值之前进行比较。 此外，响应信号可以被转换为数字信号，使得Σ-Δ电路可以更容易地消除毛刺。 以这种方式，可以在启动期间将电动机的位置确定为60度以内。