MOTOR CONTROL DEVICE AND ELECTRIC POWER STEERING DEVICE IN WHICH SAME IS MOUNTED

摘要

The problem addressed by the present invention is to provide a motor control device in which high-output drive is achieved, the motor control device maintaining steering feel with good responsiveness in relation to the operation amount of the steering wheel as in a power steering device while keeping input current at or below a prescribed value in response to vehicular power source management. This motor control device is characterized by being provided with an inverter (2) for converting DC input current (IO) from a DC voltage power source (3) into AC current and outputting the same on the basis of the rotor phase of the motor, the maximum field-weakening current (Id) being calculated by a field-weakening current command calculation unit (20) within a range such that the input current (IO) to the inverter (2) does not exceed a prescribed maximum value while torque current (Iq) is maintained, and the maximum field-weakening current (Id) being conducted.