A New Six-Phase FSCW Layout for Permanent Magnet Synchronous Wind Generators

Abstract

This paper proposes a new non-overlapped six-phase Fractional Slot Concentrated Winding (FSCW) layout for a Permanent Magnet (PM) synchronous wind generator with an outer rotor and surface mounted magnets. The proposed FSCW layout is originally an asymmetrical nine-phase winding where the nine phases are connected with a special connection as to provide an equivalent stator winding with six terminals only. The proposed winding successfully offers a high torque and voltage qualities with a low cogging torque. Besides, the stator and rotor core losses are reduced when compared with a three-phase counterpart. Finally, the high phase order of the proposed generator provides a better fault tolerant generator design. A 100kW PM generator with an outer rotor based on the proposed winding layout is designed and simulated using 2D Finite Element Analysis (FEA).