A Study of a Fractional Slot Concentrated Wound Permanent Magnet Synchronous Motor with Grain Oriented Electric Steel Lamination for Modular Stator Geometry

Nowadays the industry of electrical machines is looking for different procedures to reduce the effective cost of materials used in the manufacturing process, but at the same time to reach a good balance of efficiency. There might be many ways to obtain such a performance. It is obvious, that these machines should experience multiple adjustments to fulfill the desired requirements. The current study proposes an approach to reducing the iron core losses of Permanent Magnet Synchronous Motor (PMSM) with Fractional Slot Concentrated Wound (FSCW) by using a modular Grain-Oriented (GO) stator with steel lamination sheets. A modular structure means the yoke and teeth are distributed in multiple geometry assemblies that form together the motor stationary armature. It is known the fact that alternating current motors with an increased number of magnetic poles require a higher frequency to reach a high angular speed. At these high frequencies, the iron core loss is most significant. This study intends to provide several Finite Element Analyses (FEA) to draw different characteristics of the presented motor geometry. Finally, iron core losses are calculated, and the power balance is realized.