公开(公告)号：US07034478B2

公开(公告)日：2006-04-25

申请号：US10955981

申请日：2004-09-30

申请人： Jaydip Bhaumik ,  Jason P. Brenden ,  Dames A. Dahlberg ,  Michael Peterson ,  Ross Wilson

发明人： Jaydip Bhaumik ,  Jason P. Brenden ,  Dames A. Dahlberg ,  Michael Peterson ,  Ross Wilson

IPC分类号： H02P6/18 ,  H02P6/14

CPC分类号： H02P6/185

摘要： A three-phase spindle motor has three terminals each driven with pulse width modulated signals. Rotation of the motor is controlled by iteratively measuring an electrical period of the motor, determining a rotational position of the motor, and synchronizing the sinusoidal pulse width modulation of the spindle motor with the measured electrical period. The electrical period of the motor is measured by detecting zero crossings in the a back electromotive force induced at a first terminal of the motor and determining the time between successive zero crossings. The rotation position of the motor is determined based upon the last measured electrical period and a location of last detected zero crossing. The zero crossings are detected by selecting a time window during which the back electromotive force signal is sensed for zero crossings. The time window is selected as a function of the last measured electrical period and the rotational position of the motor.

摘要翻译： 三相主轴电机具有三个端子，每个端子由脉宽调制信号驱动。 通过迭代地测量电动机的电周期，确定电动机的旋转位置，以及使主轴电动机的正弦脉宽调制与所测量的电周期同步来控制电动机的旋转。 通过检测在电动机的第一端子处感应的反电动势中的过零点并确定连续过零之间的时间来测量电动机的电周期。 电动机的旋转位置根据最后测量的电气周期和最后检测到的过零点的位置来确定。 通过选择时间窗来检测零交叉点，在该时间窗口期间感测到反电动势信号用于过零点。 根据最后测量的电气周期和电机的旋转位置来选择时间窗口。