A New Algorithm for Optimum Design of Slotless Axial Flux Permanent Magnet Motor

In this paper, sizing equations of an Axial Flux Permanent Magnet (AFPM) machine based on analytical method are presented. Dimensions of the stator and rotor cores are calculated. It is shown that the magnetic flux densities throughout these cores remain closed to the flux density of B-H curve knee point of the ferromagnetic material characteristics. A new algorithm is proposed to determine dimensions of different parts of machine and it is used to calculate height of permanent magnet precisely. To show the suggested algorithm capability, a sample AFPM machine is designed based on sizing equations and Finite Element Analysis (FEA) is employed to validate these design formulas. A complete simulation study is done and some of the results are presented to confirm the accuracy of the sizing equations.