Control device

A control device that controls a motor, the control device comprising:

• an inverter configured to convert a DC voltage to an AC voltage and to output the AC voltage to the motor;
• a modulator configured to generate a pulse width modulation signal for controlling switches included in the inverter based on a phase voltage command value and a carrier wave;
• a current sensor configured to detect a current flowing in the motor;
• a vector controller configured to control the phase voltage command value such that a d-axis current and a q-axis current match a command value based on an output signal of the current sensor;
• a carrier controller configured to control a carrier frequency which is a frequency of the carrier waves such that a total loss of a loss of the inverter and a loss of the motor is minimized based on the d-axis current, the q-axis current, and an electrical angular velocity of the motor;
• and
• a gain controller configured to control a control gain which is used in PI control performed by the vector controller and a control period which is a period in which the PI control is performed based on the carrier frequency.