Computation of the EMF in an Axial Flux PM less Machine using Analytical Method

In this paper an analytical method for electromotive force (EMF) calculation in an axial flux PM less machine is presented. The analytical method uses the scalar magnetic potential to calculate the magnetic flux density at air gap and winding regions. Laplace equation is solved in several regions of machine and the scalar magnetic potential is calculated, then the magnetic flux density is computed using scalar magnetic potential. Finally the EMF in the stator windings is calculated. This analytical method requires less computational time than conventional finite element methods and is therefore suitable for designing and optimization purposes. The proposed analytical model validated by comparing its results to corresponding 3D finite element analysis as well as experimental results.