Drive device, fluid utilization device, and air conditioner

A drive device comprising:

• a power converter to supply power to a first synchronous motor and a second synchronous motor connected in parallel;
• a first current detector to detect a first current flowing through the first synchronous motor;
• a second current detector to detect a second current flowing through the second synchronous motor;
• a first magnetic pole position identifier to identify a first magnetic pole position of a rotor of the first synchronous motor;
• a second magnetic pole position identifier to identify a second magnetic pole position of a rotor of the second synchronous motor;
• a subtractor to obtain an angular difference using the first magnetic pole position and the second magnetic pole position, the angular difference being a difference between the magnetic pole positions of the rotors of the first synchronous motor and the second synchronous motor;
• a magnetic flux current command determiner to determine a magnetic flux current command based on the second current detected by the second current detector;
• a magnetic flux current command compensator to adjust an absolute value of the magnetic flux current command based on the angular difference;
• and
• a controller to control the power converter using a torque current command, the magnetic flux current command with the absolute value adjusted by the magnetic flux current command compensator, the first current, and the first magnetic pole position.