Analytical Design Optimization of Permanent Magnet Assisted Synchronous Reluctance Machines - Part II: Results

The reduction of computational time in design optimization of anisotropic electrical machines play a fundamental role, since the identification of the supply conditions requires the accurate knowledge of the machine magnetic model. This paper proposes a fast design optimization procedure for permanent magnet assisted synchronous reluctance machines (PMaSyRM) based on non-linear magnetic equivalent circuit (MEC) proposed and detailed in the part I, capable of accounting for both saturation and cross-saturation effects. The optimization routine is used to identify the inevitable trade-offs between the competitive needs of maximizing the torque at base speed and maximizing the efficiency in different operating points, for a given outer envelope. The obtained results are commented in depth, thus leading to some design insights also in terms of demagnetization resistance under short circuit condition.