Comparison Between Permanent Magnet Assisted Synchronous Reluctance Motors Considering Electric Vehicle Driving Cycle

Permanent magnet assisted synchronous reluctance motors are becoming a promising solution for electric vehicles, thanks to their high power density, efficiency and increased constant power speed range. The design of the rotor geometry, in terms of amount of PM to be inserted within the machine rotor slots, constitutes a challenging task which has to considered the requirements in terms of speed and torque during a typical electric vehicle driving cycle. This paper presents a comparison among different permanent magnet assisted synchronous reluctance motors for electric vehicles, by also investigating the influence of the number of pole pairs on the main performance indicators. The selected machines are therefore compared in terms of overall efficiency and operating limits, thus leading to some design insights for a given outer envelope.