Estimation of the iron losses in the rotor of high-speed synchronous reluctance motors

Various parametric analyses are carried out to investigate the dependence of the rotor iron losses behaviour on the stator and rotor geometry of several high-speed synchronous reluctance machines. Twelve 4-pole rotors have been designed with flux barriers per pole through a multi-objective dierential evolution algorithm and finite element analysis. Two dierent stators, with 24 and 36 slots are considered. During the optimization a rapid finite element evaluation has been used for the performance estimation of the examine motors. After that, an accurate time stepping finite element analysis is used for the rotor iron losses computation. Finally, the interaction between the rotor iron losses and several rotor and stator geometrical parameters is highlighted.