公开(公告)号：US20140217938A1

公开(公告)日：2014-08-07

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

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：US20160218647A1

公开(公告)日：2016-07-28

申请号：US14920042

申请日：2015-10-22

Applicant: STMICROELECTRONICS S.R.L.

Inventor： Michele BOSCOLO BERTO ,  Ezio GALBIATI

IPC: H02P6/28 ,  H02M3/158

CPC classification number: H02P6/28 ,  G11B19/2054 ,  G11B19/28 ,  H02M3/158 ,  H02M2001/0009 ,  H02P29/032

Abstract: An ohmic-inductive electrical load, such as an electric motor, for example, for a hard-disk drive, is driven by supplying thereto a load current via a switching power stage supplied with a source current delivered by a supply source. The driving action may include sensing the load current; estimating the source current starting from the load current sensed; generating a feedback signal that assumes different values as a function of the result of the comparison between the source current estimated and a source-current threshold value; and driving the switching power stage via the feedback signal, increasing or decreasing, respectively, as a function of the different values assumed by the feedback signal, the load current, thereby controlling the source current.

Abstract translation: 例如用于硬盘驱动器的诸如电动机的欧姆感应电负载通过经由提供有由电源输送的源电流的开关功率级提供给负载电流而被驱动。 驱动动作可以包括检测负载电流; 从感测的负载电流开始估算电源电流; 产生反馈信号，该反馈信号假定与源电流估计值与源电流阈值之间的比较结果的函数不同的值; 并且通过反馈信号驱动开关功率级，分别作为由反馈信号，负载电流所假设的不同值的函数而增加或减小，从而控制源电流。

公开(公告)号：US20150022128A1

公开(公告)日：2015-01-22

申请号：US14327048

申请日：2014-07-09

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Michele Berto BOSCOLO ,  Federico MAGNI ,  Paolo PASCALE ,  Ezio GALBIATI

IPC: H02P6/00

CPC classification number: H02P6/002 ,  H02P6/085 ,  H02P6/182 ,  H02P6/28 ,  H02P6/34

Abstract: A method of driving a permanent magnet synchronous electric motor includes sensing or estimating a back electromotive force induced in at least a winding of the motor by the rotation of a rotor of the motor; and reading, from a memory, values of a first voltage waveform having a phase angle with respect to the back electromotive force. The method also includes generating a driving voltage corresponding to the sum of values of a control voltage, obtained as product of the values of the first voltage waveform by a first coefficient determined as a function of a desired value of motor torque, and values of a cancelation voltage of the back electromotive force. The method also includes applying the driving voltage at the motor winding.

Abstract translation: 驱动永久磁铁同步电动机的方法包括通过电动机的转子的旋转感测或估计在电动机的至少一个绕组中感应的反电动势; 以及从存储器读取具有相对于所述反电动势的相位角的第一电压波形的值。 该方法还包括产生与作为第一电压波形的值的乘积的控制电压的值的和相对应的驱动电压，该第一系数作为电动机转矩的期望值确定的第一系数，以及 背电动势的取消电压。 该方法还包括在电动机绕组处施加驱动电压。