MOTOR CONTROL DEVICE, ELECTRIC POWER STEERING DEVICE USING SAME, AND VEHICLE

摘要

Provided are: a motor control device capable of continuing drive control of an electric motor even if an open fault or short circuit fault has arisen in a motor drive circuit; an electric power steering device using the motor control device; and a vehicle. The motor control device is provided with: a command value computation unit that outputs a command value to a multi-phase electric motor wound with a first and second multi-phase motor winding resulting in a least two systems at a stator; a first and second motor drive circuit that supply first and second multi-phase motor drive current individually to each multi-phase motor winding on the basis of the command value; a multi-phase first and second motor current breaker individually interposed between each multi-phase motor winding and each motor drive circuit; a first and second abnormality detection unit that individually detect an abnormality in each multi-phase motor drive current or voltage; and an abnormal situation current control unit that controls to a current blocking state the motor current breaker at the side at which an abnormality has been detected when an abnormality has been detected in at least one phase of motor drive current by one of the abnormality detection units.