Patent ID: 11916506
Assignee: DENSO CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 1:
2. A motor control device, comprising:
a motor having a multi-phase motor winding;
a drive circuit having drive elements corresponding to each phase of the motor winding and provided on either a low potential side or a high potential side of the motor winding;
a current detection unit having current detection resistors corresponding to each phase of the motor winding, and provided on a low potential side of the drive circuit provided on the low potential side of the motor winding, or on a high potential side of the drive circuit provided on the high potential side of the motor winding; and
a control unit having an actuator control unit configured to control a drive of the motor by controlling an on/off operation of the drive element, and an abnormality diagnosis unit configured to diagnose an abnormality in the current detection unit,
wherein
the abnormality diagnosis unit determines that the current detection unit is abnormal when a difference between a maximum value and a minimum value duty command value of each phase when a same current command value is commanded to each phase and a current feedback control is performed is equal to or larger than an abnormality determination threshold value,
the motor control device further comprises: reflux circuit having reflux elements provided corresponding to each phase of the drive elements, and
one end of the motor winding is connected to the drive element, and the other end is connected by a connection portion.