公开(公告)号：US20150280625A1

公开(公告)日：2015-10-01

申请号：US14641956

申请日：2015-03-09

Applicant: STMICROELECTRONICS S.R.L.

Inventor： Michele BOSCOLO BERTO

IPC: H02P6/18

CPC classification number: H02P6/18 ,  G01D5/2006 ,  H02P27/08

Abstract: An apparatus for detecting a position of a rotor of a DC motor with N phases having a plurality of windings. The apparatus includes circuitry to couple at least two of the windings between a supply voltage and a reference voltage according to a first current path and allow the current stored in the two windings to be discharged through a second current path. The circuitry is configured to force the at least two windings at a short circuit condition in the second current path. The apparatus also includes a measurement circuit configured to measure the time period of discharging the current stored in the two windings and a rotor position detector for detecting the rotor position based on the measured time period.

Abstract translation: 一种用于检测具有多个绕组的N相的直流电动机的转子的位置的装置。 该装置包括根据第一电流路径在电源电压和参考电压之间耦合至少两个绕组的电路，并且允许存储在两个绕组中的电流通过第二电流路径放电。 电路被配置为在第二电流路径中迫使至少两个绕组处于短路状态。 该装置还包括测量电路，其被配置为测量存储在两个绕组中的电流的放电时间;以及转子位置检测器，用于基于测量的时间周期来检测转子位置。

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。