Information management system for drive apparatus and method of manufacturing drive apparatus

A method of manufacturing a drive apparatus comprising a rotary electrical machine and a rotation sensor detecting a rotation position of a rotor of the rotary electrical machine, the method comprising:

• first assembling the rotary electrical machine with the rotation sensor;
• measuring a back electromotive force by mechanically driving the rotary electrical machine;
• obtaining position error information of the rotation sensor based on information of the back electromotive force and output information from the rotation sensor;
• storing the position error information in a storage medium;
• reading the position error information from the storage medium via communication;
• writing the position error information read in the reading into a control device which controls the rotary electrical machine;
• and
• second assembling the control device with the rotary electrical machine.