The two most important electric motors are the ac induction motor and ... types of motors have different rotor configurations and operate very differently. Design tools like CD-Adapco’s SPEED ...

An electric motor designed for railway applications that used coaxial contrarotating rotors was granted a patent in 1890. The original design ... type of rotor is suitable, including induction ...

more efficient motor design free from rare earths in 2021. The German automotive supplier has been using wireless induction with a rotor configuration it calls the Magnet-free Contactless ...