Motor control device

A motor control device for controlling energization of a multiphase brushless motor in a vector control manner, the motor control device comprising:

• a current command value generation unit that generates a q-axis current command value and a d-axis current command value;
• a controller that calculates a q-axis voltage command value and a d-axis voltage command value under a feedback control of the q-axis current command value and the d-axis current command value;
• a saturation guard unit that corrects at least one of the q-axis voltage command value and the d-axis voltage command value to set a magnitude of a voltage vector of the q-axis voltage command value and the d-axis voltage command value to be equal to or smaller than a predetermined voltage guard value;
• and
• a current command value limiting unit that limits at least one of the q-axis current command value and the d-axis current command value using one of a current limit gain and a current guard value, which are calculated based on a voltage saturation amount as the magnitude of the voltage vector of the q-axis voltage command value and the d-axis voltage command value corrected by the saturation guard unit.