Advanced Theory of Fractional-Slot Concentrated-Wound Permanent Magnet Synchronous Machines (Springer Theses) (English Edition)

This book focuses on the analytical modeling of fractional-slot concentrated-wound (FSCW) interior permanent magnet (IPM) machines and establishes a basis for their magnetic and electrical analysis. Aiming at the precise modeling of FSCW IPM machines' magnetic and electrical characteristics it presents a comprehensive mathematical treatment of the stator magneto-motive force (MMF) the IPM rotor non-homogeneous magnetic saturation and its airgap flux density. The FSCW stator spatial MMF harmonics are analytically formulated providing a basis on which a novel heuristic algorithm is then prop osed for the design of optimal winding layouts for multiphase FSCW stators with different slot pole combinations. In turn the proposed mathematical models for the FSCW stator and the IPM rotor are combined to derive detailed mathematical expressions of its operational inductances electromagnetic torque torque ripple and their respective subcomponents as a function of the machine geometryand design parameters. Lastly the proposed theories and analytical models are validated using finite element analysis and experimental tests on a prototype FSCW IPM machine.