Design and optimization of concentric saddle shaped coils for permanent magnet transverse flux machine in segmented construction

Design of multi-turns concentric saddle windings are required for flux concentrated permanent magnet transverse flux machine, FCPM-TFM in a sector wise configuration. In the segmented construction of FCPM-TFM, saddle coils or concentric type of windings are used to replace the ring coils, which are normally utilised in the conventional layered-phase structures for generating fields´ perpendicular to the axis of cylindrical shell to which the coils are confined. This paper investigates the optimum design of saddle phase windings for this special construction of TFM that is constructed as an outer-rotor for in-wheel motor applications. Meshed and non-meshed coils are designed and their parameters effects are studied via finite element method (FEM). Throughout the study, optimisation of two stator structures, i.e., laminated and soft magnetic composite, SMC-pressed, are shown.