Influence of material doping degree on performance of IMCCR used for EV

At present, the total or main power energy in plug-in hybrid electrical vehicles and electrical vehicles is a limited energy source, and reducing the unnecessary loss effectively becomes one of the methods to enhance vehicle efficiency. In this paper, a kind of induction motor with compound cage rotor(IMCCR) is proposed, in which rotor bars are composed of upper parts made of alloy (conductor for electric and magnetic) and lower parts made of cast aluminum. By using FEM, starting performances of IMCCR is studied. From the comparison of obtained results with the test data, it can be inferred that IMCCR would be a better choice for driving system in vehicles. Considering the variation of alloy material characteristics caused by different materials components doping degrees, the influences of alloy bar materials on IMCCR flux distribution and machine performance are studied. Meanwhile, the effects special alloy bar positions and numbers on machine starting performance are researched. Some conclusions are summarized, which may provide useful reference for improving on driving induction motors used for vehicles.