Improved design of coreless axial flux permanent magnet synchronous generator with low active material cost

This paper presents an improved design of coreless axial flux permanent magnet synchronous generator with consideration of design restrictions, in order to active material cost reduction. A computer aided program based on sizing equation is developed. Sensitivity analysis of design main parameters is evaluated and their variation effect on the generator cost and performance is considered. A 2 kW generator with two parallel rotors and one inner coreless stator is designed with respect to sensitivity analysis results. The 3-D finite element model (FEM) is used to confirm the validity of design algorithm.