公开(公告)号：US11711045B2

公开(公告)日：2023-07-25

申请号：US17406215

申请日：2021-08-19

Applicant: DENSO CORPORATION

Inventor： Ryuji Omata ,  Michitsune Fujii ,  Daigo Nobe ,  Makoto Nakamura

IPC: H02P1/32 ,  H02P3/20 ,  H02P7/06 ,  H02P29/028 ,  H02P25/22 ,  H02P27/08

CPC classification number: H02P29/028 ,  H02P25/22 ,  H02P27/08

Abstract: An electric motor drive device controls driving of a motor having open windings of two or more phases having end points that are open to each other. The switching arbitrator determines switching between a single-sided and dual-sided drive mode and arbitrates output of each of the inverters at a time of switching wherein output of the motor is continuous before and after the drive mode switching. The single-sided drive mode is a mode in which one of the two inverters performs switching drive. The dual-sided drive mode in which both the two inverters perform switching drive. The switching arbitrator gradually changes and increases the power level of the drive-start-side inverter from zero when the single-sided drive mode is switched to the dual-sided drive mode, and gradually changes and decreases the power level of the drive-end-side inverter to zero when the dual-sided drive mode is switched to the single-sided drive mode.