公开(公告)号：US09431934B2

公开(公告)日：2016-08-30

申请号：US14247955

申请日：2014-04-08

Applicant: STMICROELECTRONICS, INC. ,  STMICROELECTRONICS S.r.l.

Inventor： Frederic Bonvin ,  Ezio Galbiati

IPC: H02P6/10 ,  G11B19/20 ,  H02P6/08 ,  H02P6/18

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：US10256751B2

公开(公告)日：2019-04-09

申请号：US15065617

申请日：2016-03-09

Applicant: STMicroelectronics, Inc.

Inventor： Frederic Bonvin

IPC: H02P6/14 ,  H02P3/12 ,  G11B19/20 ,  H02M7/5388 ,  H02P3/22 ,  H02P6/08

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.

公开(公告)号：US09362855B2

公开(公告)日：2016-06-07

申请号：US14247817

申请日：2014-04-08

Applicant: STMICROELECTRONICS, INC. ,  STMICROELECTRONICS S.r.l.

Inventor： Frederic Bonvin ,  Agostino Mirabelli ,  Maurizio Nessi

IPC: H02P6/16 ,  H02P6/18 ,  H02P6/10 ,  G11B19/20 ,  H02P6/08

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：US20160189742A1

公开(公告)日：2016-06-30

申请号：US15065617

申请日：2016-03-09

Applicant: STMicroelectronics, Inc.

Inventor： Frederic Bonvin

IPC: G11B19/20 ,  H02M7/5388 ,  H02P6/08

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。