Analytical Design and Power Density Assessment of Slotted Double-Sided AFPM Disc Motors

Since wise selection of Axial Flux Permanent Magnet (AFPM) motors with high power and torque densities is an important factor, this paper presents a comparative study on power densities of two slotted double-sided AFPM motors. In this regard, two different topologies including one-stator-two-rotors (TORUS) and one-rotor-two-stators (AFIR) are introduced as case studies. To evaluate the power densities of the mentioned structures, the general purpose sizing equations along with the analytical design equations of corresponding motors are presented. Field analysis of both Topologies of slotted motors is investigated using Finite Element method (FEM) software. Considering the optimum designs of related topologies, performances of the AFPM motors are evaluated via different working situations and the operating results are shown subsequently.