公开(公告)号：US11442415B2

公开(公告)日：2022-09-13

申请号：US17046758

申请日：2018-12-14

申请人： Hitachi Industrial Equipment Systems Co., Ltd.

发明人： Takaaki Hayashi ,  Yusuke Arao

IPC分类号： H02P29/024 ,  G05B9/02 ,  H02M7/5395

摘要： A power conversion device includes a function of improving safety of a system by making a dynamical setting for a safety function operation at a time of detecting an abnormality in a system operation or a diagnosis error in accordance with a condition of the system at a time of the abnormality. A power conversion system includes a power conversion device main body configured to drive a motor and a safety function unit configured to execute a safety function. The safety function unit outputs a safety function operation instruction signal when receiving a safety request signal, and the power conversion device main body controls the motor by the safety function operation instruction signal. The safety function unit monitors a state of the motor, and, in a case where the state of the motor exceeds a predetermined range, executes a threshold-value-excess post-process by a safety function operation selected in advance.