公开(公告)号：US20240396483A1

公开(公告)日：2024-11-28

申请号：US18672013

申请日：2024-05-23

Applicant: KABUSHIKI KAISHA YASKAWA DENKI

Inventor： Yoshiyasu TAKASE ,  Akira YAMAZAKI ,  Yasumasa HAMABE ,  Takahiro SAEKI

IPC: H02P23/30 ,  H02P21/00 ,  H02P21/14 ,  H02P21/18 ,  H02P23/20

Abstract: A power conversion device includes: power conversion circuitry configured to supply drive power to an induction motor; and control circuitry configured to: generate a torque command; correct the torque command, in response to determining that a magnitude of a primary frequency of the induction motor is less than a lower limit level, so that the magnitude of the primary frequency approaches the lower limit level; and control the power conversion circuitry to supply the drive power so that the induction motor generates a torque corresponding to the torque command.