公开(公告)号：US11133770B2

公开(公告)日：2021-09-28

申请号：US16900326

申请日：2020-06-12

Applicant: Delta Electronics, Inc.

Inventor： Yi-Jan Chang ,  Yi-Kai Chou ,  Po-Sung Chiang ,  Chien-Hao Chen

IPC: H02P29/024

Abstract: A motor drive system and a control method are provided. The motor drive system is electrically connected to a motor. The motor drive system includes two safe torque off (STO) modules to achieve a two-channel STO redundancy infrastructure, so as to improve the safety of the motor drive system. In addition, the motor drive system includes a diagnosis module to diagnose malfunction of the STO modules. It ensures the STO modules to meet the related safety requirements.