公开(公告)号：US10944351B2

公开(公告)日：2021-03-09

申请号：US16633251

申请日：2018-06-12

申请人： MINEBEA MITSUMI Inc.

发明人： Hiroyuki Kaidu ,  Yuji Omura ,  Tomoyuki Suzuki

IPC分类号： H02P6/14 ,  H02P27/08 ,  H02P23/04 ,  H02P25/22

摘要： A motor drive control device capable of reducing the occurrence of vibration in a simple circuit configuration is provided. The motor drive control device (1) includes a motor drive unit (2) that selectively energizes coils with a plurality of phases (Lu, Lv and Lw) of a motor (20) and a control circuit (4) that outputs a drive control signal (Sd) which is a PWM signal to the motor drive unit (2) and thereby controls driving of the motor (20) while switching energization phases of the coils with the plurality of phases (Lu, Lv and Lw) energized by the motor drive unit (2) in predetermined order. The control circuit (4) executes reduction control to temporarily reduce a duty ratio of the drive control signal (Sd) every time a period of 1/m (m is an integer of 2 or more) of a switching cycle of the energization phases elapses after switching the energization phases.