On the performances investigation and iron losses computation of an inset surface mounted permanent magnet motor

The present paper is dedicated to the performance evaluation of a synchronous permanent magnet motor (PMSM) with surface interior magnets specifically suited for electric vehicle hybrid applications. The main purpose is to develop an optimized design with low iron losses. At first, the major motor features: output torque and airgap flux density are investigated. In order to show the effectiveness of the studied motor, the obtained machine characteristics are compared with those of two other configurations. Secondly, the iron losses of the studied topology are evaluated by using analytical models coupled with a 2 dimensional time-stepped finite element analysis (FEA). These iron losses are separated into hysteresis losses, eddy current losses and excess losses. In the modeling of these losses, the non sinusoidal induction waveform through the magnetic circuit has been considered.