Finite Element Analysis of a Set of Four Electric Machines with the Same Stator Armature and Main Size of the Rotor Magnetic Core

Performances of a set of four electrical machines with the same stator armature and the same diameter and length of the rotor magnetic core are evaluated through finite element step by step in time domain models. The three rotors, the first one of the induction motor, the second of the synchronous motor and generator and the third one of a new hybrid induction-synchronous motor, include or a squirrel cage, or four permanent magnets, or both a squirrel cage and permanent magnets. The comparison of the finite element results related the starting time and starting current, the steady state rated values of the stator current and of the efficiency, situates the new hybrid induction-synchronous motor on the first position.