Motor control device

A motor control device comprising:

• an inverter that produces three-phase alternating current to drive a motor;
• a current command generation unit that generates a d-axis current command value and a q-axis current command value from a target torque of the motor;
• a correction value generation unit that generates a d-axis correction value and a q-axis correction value that suppress noise having a frequency six times as high as a frequency of change in an electrical angle of the motor, based on the target torque and the electrical angle;
• a voltage command generation unit that generates a d-axis voltage command value based on a d-axis current correction command value obtained by adding the d-axis correction value to the d-axis current command value, and generates a q-axis voltage command value based on a q-axis current correction command value obtained by adding the q-axis correction value to the q-axis current command value;
• a dq inverse transform unit that generates voltage command values for respective three phases from the d-axis voltage command value and the q-axis voltage command value;
• and
• a drive signal generation unit that generates a drive signal of the inverter from the voltage command values for the respective three phases, wherein:
• the voltage command generation unit generates the d-axis voltage command value based on a difference between the d-axis current correction command value and a d-axis current of the motor;
• the voltage command generation unit generates the q-axis voltage command value based on a difference between the q-axis current correction command value and a q-axis current of the motor;
• the voltage command generation unit generates the d-axis voltage command value using time differentiation of the d-axis current correction command value;
• and
• the voltage command generation unit generates the q-axis voltage command value using time differentiation of the q-axis current correction command value.