公开(公告)号：WO2014122517A2

公开(公告)日：2014-08-14

申请号：PCT/IB2014/000104

申请日：2014-02-04

Applicant: ANALOG DEVICES TECHNOLOGY

Inventor： CAHILL, Alan, Patrick ,  CASEY, Gary ,  CLEARY, John, A. ,  ENGLISH, Eoin, E. ,  JIMENEZ, Christian ,  CALPE MARAVILLA, Javier ,  LYDEN, Colin, G. ,  ROCHE, Thomas, F.

CPC classification number: G01H13/00 ,  H02P25/028 ,  H02P25/034

Abstract: A method and apparatus for automatic resonance detection is disclosed for a motor- driven mechanical system such as a voice coil motor (VCM) in which a resonance detector and driver are provided. The automatic resonance detector may be implemented on the same integrated circuit as the driver, and dynamically determines the natural resonant frequency of the VCM driven by the driver. The resonant frequency is determined by measuring the back electromotive force (BEMF) of the VCM, detecting the slope of the BEMF signal, and determining the resonant frequency from the slope of the BEMF signal.

Abstract translation: 公开了一种用于自动共振检测的方法和装置，用于诸如其中设置有共振检测器和驱动器的音圈电动机（VCM）的电动机械系统。 自动共振检测器可以在与驱动器相同的集成电路上实现，并且动态地确定由驱动器驱动的VCM的固有谐振频率。 谐振频率通过测量VCM的反电动势（BEMF），检测BEMF信号的斜率以及从BEMF信号的斜率确定谐振频率来确定。