公开(公告)号：US20150137713A1

公开(公告)日：2015-05-21

申请号：US14502493

申请日：2014-09-30

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： MANDY BARSILAI ,  David Hernandez

IPC: H02P25/02

CPC classification number: H02P25/032 ,  H02P6/182 ,  H02P25/06

Abstract: A system includes a controller to control movement of a linear resonant actuator (LRA). The system includes a monitor in the controller to monitor a back electromotive force (BEMF) signal from the LRA representing the movement of the LRA. The monitor generates an indicator that indicates whether or not movement of the LRA has occurred. A primary loop module in the controller controls acceleration and braking of the LRA based on the monitored BEMF signal if the indicator from the monitor indicates that LRA movement has occurred. An alternate cycle module in the controller pushes the LRA at a predetermined frequency if the indicator from the monitor indicates that LRA movement has not occurred. The push is employed to move the LRA when the BEMF signal is undetectable by the monitor with respect to a predetermined threshold.

Abstract translation: 系统包括控制线性谐振致动器（LRA）的运动的控制器。 该系统包括控制器中的监视器，用于监视来自表示LRA的运动的LRA的反电动势（BEMF）信号。 监视器生成一个指示器，指示是否发生了LRA的移动。 控制器中的主回路模块根据监控的BEMF信号控制LRA的加速和制动，如果来自监视器的指示器指示发生了LRA运动。 如果来自监视器的指示器指示没有发生LRA运动，则控制器中的替代循环模块以预定频率推动LRA。 当监视器相对于预定阈值检测不到BEMF信号时，采用推动来移动LRA。