公开(公告)号：US20230421084A1

公开(公告)日：2023-12-28

申请号：US18035295

申请日：2022-03-31

Applicant: MITSUBA Corporation

Inventor： Ryo OHORI ,  Tsuyoshi OSAWA ,  Atsushi MOCHIDA

IPC: H02P23/14 ,  H02P27/08

CPC classification number: H02P23/14 ,  H02P27/08

Abstract: The invention reduces the stoppage of operation due to a sudden decrease in rotation speed. A motor device includes a motor that is rotationally driven; a drive signal generator that controls a duty ratio indicating a drive output of the motor so as not to exceed a duty ratio upper limit value, and generates a drive signal corresponding to the duty ratio; an inverter that outputs an output signal for rotationally driving the motor based on the drive signal; a rotation speed detector that detects a rotation speed of the motor; an acceleration detector that detects whether the motor is accelerating; and an upper limit value setting part that changes the duty ratio upper limit value to a second upper limit value higher than a preset first upper limit value in response to rotation of the motor being accelerating.