公开(公告)号：US20210242816A1

公开(公告)日：2021-08-05

申请号：US17165402

申请日：2021-02-02

Applicant: DENSO CORPORATION

Inventor： Yuuichi SEO ,  Hironori IWAMIYA ,  Hirokazu TOYODA

IPC: H02P25/22 ,  H02K11/33 ,  H02P6/16

Abstract: A motor controller for controlling a drive of a motor having plural phase windings includes upper and lower arm circuits and a control unit. The control unit switchingly controls ON/OFF of switches of the upper and lower arm circuits, for sequentially switching an energized phase of the motor. Then, from among the plural switches, a switch forming an energization path to the energized phase is designated as an energized phase switch with the others of the plural switches being designated as non-energized phase switches. Further, from among the non-energized phase switches, a switch forming a path of a reflux current that accompanies the switching of the energized phase is designated as a reflux switch. Then, the control unit performs an ON control of the energized phase switch in addition to performing an ON control of the reflux switch.