公开(公告)号：US10439539B2

公开(公告)日：2019-10-08

申请号：US15135330

申请日：2016-04-21

Applicant: ANALOG DEVICES GLOBAL UNLIMITED COMPANY

Inventor： Jesus Javier Lopez ,  Alberto Marinas ,  Eduardo M. Martinez ,  Santiago Iriarte

IPC: H02P25/034

Abstract: The present disclosure provides a feedback control system and method for a bidirectional VCM. The system employs an analog core that is common to both the PWM and linear modes of operation. The analog core includes a feedback mechanism that determines the error in the current flowing through the motor. The feedback mechanism produces an error voltage that corresponds to the current error, and applies the voltage to a control driver. The control driver then controls the motor, based on the error voltage, in either a PWM or linear mode. By sharing a common core, the switching time between modes is improved. Furthermore, the output current error between modes is reduced.