Analytic and FEM evaluation of power density for various types of double-sided axial flux slotted PM motors

Double-sided axial flux PM motors (AFPM) are the most promising and widely used types. There are two topologies for slotted double-sided AFPM motors. Selecting an AFPM motors with high power density is an important parameter in applications. So, comparison of power density between different topologies of double-sided AFPM motors seems to be necessary.

In this paper, the sizing equations of axial flux slotted one-stator-two-rotor (TORUS) and two-stator-one-rotor (AFIR) type PM motors is presented and comparison of the TORUS and AFIR topologies in terms of power density is illustrated. Field analyses of both Topologies of slotted motors are investigated using Finite Element method (FEM) software. Finally a high power double-sided AFPM motor is introduced in the paper.