公开(公告)号：US20240079981A1

公开(公告)日：2024-03-07

申请号：US18074276

申请日：2022-12-02

Applicant: Delta Electronics, Inc.

Inventor： Chih-Hung Hsiao ,  Chung-Hsing Ku ,  Shang-Wei Chiu ,  Zhi-Sheng Yang

IPC: H02P21/22 ,  H02P21/20

CPC classification number: H02P21/22 ,  H02P21/20

Abstract: A motor drive system includes an electric motor, a drive circuit and a control unit. The drive circuit provides a driving current to the electric motor. A current command generator of the control unit generates a current command according to a torque command and a motor operating information. The driving current is converted into a d-axis current and/or a q-axis current by the control unit. Consequently, the driving current is close to the d-axis current command and/or the q-axis current command corresponding to the current command. If a value of the torque command is positive, the current command generator generates the corresponding current command according to a MTPA lookup table. If the value of the torque command is negative, the current command generator generates the corresponding current command according to a zero recycle lookup table.

公开(公告)号：US12132425B2

公开(公告)日：2024-10-29

申请号：US18074276

申请日：2022-12-02

Applicant: Delta Electronics, Inc.

Inventor： Chih-Hung Hsiao ,  Chung-Hsing Ku ,  Shang-Wei Chiu ,  Zhi-Sheng Yang

IPC: H02P21/22 ,  H02P21/20

CPC classification number: H02P21/22 ,  H02P21/20

Abstract: A motor drive system includes an electric motor, a drive circuit and a control unit. The drive circuit provides a driving current to the electric motor. A current command generator of the control unit generates a current command according to a torque command and a motor operating information. The driving current is converted into a d-axis current and/or a q-axis current by the control unit. Consequently, the driving current is close to the d-axis current command and/or the q-axis current command corresponding to the current command. If a value of the torque command is positive, the current command generator generates the corresponding current command according to a MTPA lookup table. If the value of the torque command is negative, the current command generator generates the corresponding current command according to a zero recycle lookup table.