Electric motor control device

An electric motor control device that drives and controls a plurality of electric motors connected in parallel, the electric motor control device comprising:

• a power conversion device configured to convert power from a power supply, and to supply the power to the plurality of electric motors;
• a current detection device configured to detect an electric current flowing through each of the plurality of electric motors;
• and
• a controller configured to control the power conversion device according to a speed command value from an external device and a current value relating to detection from the current detection device, wherein
• the controller includes
• a first control unit configured to perform first control on each of the plurality of electric motors based on the electric current,
• a second control unit configured to perform second control of controlling the plurality of electric motors such that an estimated speed of each of the plurality of electric motors obtained based on the current value follows the speed command value, and
• a switching determination unit configured to perform switching determination processing of switching between the first control performed by the first control unit and the second control performed by the second control unit according to drive information on at least one or more of the plurality of electric motors.