A motor control device includes: a frequency instruction setting section for outputting a plurality of frequency instructions; an AC voltage instruction generation section for generating and outputting an AC voltage instruction based on each of the frequency instructions; a voltage application section for applying voltage to a motor based on the AC voltage instruction; a current detection section for detecting motor current flowing in the motor; and a type determination section for determining the type of the motor based on a transfer characteristic of the motor calculated from the motor current, the AC voltage instruction, and the frequency instruction.