Comparative Analysis of Fractional Slot Concentrated Wound Permanent Magnet Synchronous Machines with Different Stator Grain Oriented Electric Steel Lamination Topologies

This paper aims to present a comparative FEM analysis between different stator topologies of permanent magnet synchronous machine (PMSM) with fractional slot concentrated wound (FSCW). The main topology difference consists in using two distinct materials for the stator core. The materials refer to non-oriented electric steel (NOES) and grain-oriented electric steel (GOES) lamination. Four stator topologies have been obtained by combining these materials. The first topology is strictly used as a comparison reference, the next two topologies approach a modular stator core, and the last one–a horseshoe bent strips core. Modular core construction simplifies the manufacturing technology and reduces the overall production costs without a significant impact on machine performance.