In this thesis it has been analysed a permanent magnet synchronous motor (PMSM) of a battery electric vehicle (BEV) with a V-shaped magnets in the rotor, six-phase at 52 V, 12 conductors per slot. Two modes have been distinguished: dual mode, which uses six-phase active inverters, and the frugal mode, which has only one inverter with three-phase active. The machine is cooled with an housing water jacket in spiral configuration, assuming a constant volume flow rate and given inlet coolant temperature. Different drive cycles have been analysed for the two configurations: acceleration cycle 0-100 km/h; climbing cycle with 20 % slope; WLTP Class 3 cycle.