公开(公告)号：US20240128908A1

公开(公告)日：2024-04-18

申请号：US18277117

申请日：2021-08-31

Applicant: Hitachi Astemo, Ltd.

Inventor： Noriya NAKAO ,  Shun TANIGUCHI ,  Toshiyuki AJIMA ,  Keiji KADOTA

IPC: H02P21/22 ,  B60K1/00 ,  B60L15/20

CPC classification number: H02P21/22 ,  B60K1/00 ,  B60L15/20 ,  B60L2240/423 ,  B60L2240/427

Abstract: A motor drive device is a device that controls torque generated by a motor, based on a d-axis current and a q-axis current, to drive the motor. The motor drive device includes a d-axis current instruction generating unit that calculates a first d-axis current instruction, a current instruction correcting unit that generates a positive correction quantity that is added to the first d-axis current instruction when a voltage across terminals of the motor is equal to or larger than a given value, and a voltage feedback control unit that generates a negative correction quantity that is added to the first d-axis current instruction to prevent the voltage across the terminals of the motor from exceeding a given maximum output voltage. The motor drive device controls the torque, based on a second d-axis current instruction created by adding the positive correction quantity and the negative correction quantity to the first d-axis current instruction and on a q-axis current instruction.