Motor control device and motor control method

A motor control device for controlling a motor by supplying a drive signal generated based on a rotation command value by a drive circuit to the motor, the motor control device comprising:

• a voltage detection part configured to detect a supply voltage supplied to the drive circuit as a load voltage;
• a current detection part configured to detect a current of the drive signal as a load current;
• and
• a power limitation part configured to:
• calculate a load power of the drive circuit based on the load voltage and the load current,
• determine whether a host command rotation speed is larger than a current command rotation speed,
• in response to the host command rotation speed is larger than the current command rotation speed, determine whether the load power is higher than a predetermined upper limit value, and
• decrease the rotation command value in response to the load power exceeding the predetermined upper limit value to perform power limitation.