MOTOR CONTROL DEVICE, ELECTRICALLY-DRIVEN POWER STEERING APPARATUS EMPLOYING THE SAME AND VEHICLE

摘要

PROBLEM TO BE SOLVED: To provide a motor control device capable of continuing drive control of an electrically-driven motor even in the case where an open failure or a short-circuit failure occurs in a motor drive circuit, an electrically-driven power steering apparatus employing the same and a vehicle.SOLUTION: The motor control device comprises: a command value computation section for outputting a command value to a multiphase electrically-driven motor in which first and second multiphase motor coils to be at least two systems are wound around a stator; first and second motor drive circuits for individually supplying first and second multiphase motor drive currents to the multiphase motor coils on the basis of the command value; multiphase first and second motor current cutoff section individually interposed between the motor drive circuits and the multiphase motor coils; first and second abnormality detection sections for individually detecting abnormality in the multiphase motor drive currents or voltages; and an abnormal time current control section for controlling the motor current cutoff section at a side where abnormality is detected, into a current cutoff state when abnormality of at least one-phase motor drive current is detected by any one of the abnormality detection sections.