公开(公告)号：US20100052585A1

公开(公告)日：2010-03-04

申请号：US12552989

申请日：2009-09-02

Applicant: Frederic BONVIN ,  Ezio GALBIATI

Inventor： Frederic BONVIN ,  Ezio GALBIATI

IPC: H02P6/10 ,  H02P6/08

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 operable 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 operable 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。 马达驱动器可操作以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马达驱动器并且可操作以改变第一分量。 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：US20100097717A1

公开(公告)日：2010-04-22

申请号：US12580748

申请日：2009-10-16

Applicant: Frederic BONVIN

Inventor： Frederic BONVIN

IPC: G11B21/02 ,  H02P6/00 ,  H02P6/18

CPC classification number: G11B19/28 ,  H02P6/182

Abstract: In BLDC motors driven via sensorless techniques, the BEMF signals in the motor coils may be used to detect the position of the motor such that speed of the motor may be accurately controlled. When detecting the BEMF signals, however, small perturbations occur which negatively impact the rotational torque of the motor. As a result, torque ripple may occur at regular intervals which may result in inefficiencies as well as audible noise. In various embodiments as described herein, the sampling of the BEMF signals may be done so at pseudo-random intervals such that the overall spectral energy that presents from the BEMF detections may be reduced at specific frequencies (such as fundamental sampling frequencies and harmonics thereof) and spread out over many more frequencies. Thus, despite the overall spectral energy being the same, the amplitude of any given frequency is lower as the sampling of the BEMF is less periodic.

Abstract translation: 在通过无传感器技术驱动的BLDC电机中，电机线圈中的BEMF信号可用于检测电机的位置，从而可以精确控制电机的速度。 然而，当检测到BEMF信号时，会发生小的扰动，这会对电动机的转矩产生负面影响。 结果，扭矩波动可以以规则的间隔发生，这可能导致低效率以及可听见的噪声。 在本文所述的各种实施例中，BEMF信号的采样可以以伪随机间隔进行，使得可以在特定频率（例如其基本采样频率和谐波）处降低从BEMF检测呈现的总频谱能量， 并分布在更多频率上。 因此，尽管总体光谱能量相同，但是任何给定频率的振幅都较低，因为BEMF的采样周期性较差。

公开(公告)号：US20100165811A1

公开(公告)日：2010-07-01

申请号：US12505822

申请日：2009-07-20

Applicant: Frederic BONVIN

Inventor： Frederic BONVIN

IPC: G11B19/04

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：US20100052587A1

公开(公告)日：2010-03-04

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: H02P6/18

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：US20110109255A1

公开(公告)日：2011-05-12

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: H02P6/18

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。

公开(公告)号：US20100123419A1

公开(公告)日：2010-05-20

申请号：US12620929

申请日：2009-11-18

Applicant: Frederic BONVIN

Inventor： Frederic BONVIN

IPC: H02P6/14 ,  H02P3/12

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。