Comparison between induction machine and interior permanent magnet machine for electric vehicle application

This paper makes a quantitative comparison between induction machine (IM) and interior permanent magnet machine (IPM) for electric vehicle (EV) application, in terms of electromagnetic performance and material cost. The popular Toyota Prius 2010 IPM is adopted directly, and the IM is designed with the same stator outer diameter and stack length as Prius 2010 IPM for a fair comparison. The design process of IM is introduced, and the torque capability, torque/power-speed characteristics, torque ripple and cost, are compared and discussed.