A New Topology of Fractional-Slot ConcentratedWound Permanent Magnet Synchronous Motor with Grain-Oriented Electric Steel for Stator Laminations

The race to achieving maximum efficiency and higher torque/power density in electrical machines has started long time ago and now is slowly pushing its limits. Choosing the right type of electrical machine for each application, using computer added design and optimization methods for dimensioning and building complex electric drive systems contributed to today’s performances in this field. Lately, the specialist’s attention turned to using revolutionary materials with outstanding proprieties, for electrical machines to reach higher goals; but this approach comes with additional production costs that some mass industries are not willing to pay. Instead, this paper comes with a new proposal for using grain-oriented electric steel, which is a commonly used silicon steel for electrical transformers, in fractional-slot concentrated-wound (FSCW) permanent magnet synchronous motors (PMSM), for performance improvement. Finite Element Analysis (FEA) is used for simulations and some preliminary conclusions are drawn.