公开(公告)号：US20170331356A1

公开(公告)日：2017-11-16

申请号：US15590533

申请日：2017-05-09

申请人： DENSO CORPORATION

发明人： Kotaro NAKASHIMA

IPC分类号： H02K23/66 ,  H02M7/5387 ,  H02K17/30 ,  H02K9/06 ,  H02K21/04 ,  G01D5/14 ,  H02M1/32

CPC分类号： H02K23/66 ,  G01D5/145 ,  H02K3/28 ,  H02K5/225 ,  H02K9/06 ,  H02K11/33 ,  H02K17/30 ,  H02K21/046 ,  H02M7/5387 ,  H02M2001/325

摘要： An electronic control unit includes two inverters, a magnetic sensor, a failure detection unit, an inverter driving unit, a signal examination unit, and a failed element identification unit. The magnetic sensor detects a magnetic flux generated around a winding. The failure detection unit detects an ON-state failure of the inverter. When the ON-state failure is detected, the inverter driving unit stops driving the inverter to which the ON-state failure has been detected, and continues driving the other inverter. The signal examination unit examines a presence or absence of a special signal. When there is a signal appearing according to a special magnetic flux, the failed element identification unit identifies a failed switching element based on a motor electric angle generated by the signal.