Motor Control Device

Abstract: A motor control device (100a) has: a synchronous operation mode in which a motor M is controlled such that the rotational speed of the motor coincides with a speed command value to cause the motor to be synchronized with a rotational phase obtained by integrating the speed command value; and a position sensorless control mode in which the motor M is controlled such that a speed estimation value, obtained by feedback-controlling the axial error between a control system coordinate axis and a rotor coordinate axis, coincides with the speed command value. In the motor control device: a synchronous operation current command value generator (13) generates a current command value in the synchronous operation mode; a current controller (20), a non-interference controller (36), and an adder (21) generate a voltage command value such that a current flowing through the motor M coincides with the current command value; and a lock determination instrument (52) determines whether or not the motor M is locked on the basis of the voltage command value.

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