公开(公告)号：US11588428B2

公开(公告)日：2023-02-21

申请号：US17559405

申请日：2021-12-22

申请人： Alps Alpine Co., LTD

发明人： Yuzo Sasaki

IPC分类号： H02P25/034 ,  H02P21/14

摘要： One form of a motor control device includes: a waveform generation unit and an amplifier that generate a drive voltage of a voice coil motor (VCM); a DC offset detection unit that detects a DC offset of the drive voltage; a stop control unit that stops application of the drive voltage to a motor coil when the detected DC offset exceeds an operation stop threshold; a temperature correction value setting unit that sets a temperature correction value corresponding to the DC offset when the detected DC offset is lower than the operation stop threshold; a thermistor that detects an ambient temperature; and a vibration level control unit that varies the drive voltage and controls an amplitude level based on the detected ambient temperature and the set temperature correction value.