Influence of materials on design of interior PM synchronous motor

This paper studies the influence of core material on the design of the interior PM synchronous motor (IPMSM). Two kinds of ferromagnetic steels are selected in this paper. And with these two core materials, two IPMSMs used to drive the electric scooter are designed. First, the parameters of these two motors, including the inductance, iron-loss resistance, and back electromotive force are calculated in the numerical methods. Then, using the equivalent circuit, the characteristics such as current, efficiency, copper loss and iron losses are estimated. Finally, for the same output power, the dimension, weight and cost of these two motors will be compared. The study results of this paper will provide the reference of core material selection to the various designs of motor.