Effect of air gap on torque density for double-sided TORUS and AFIR slotted PM motors

Document Type : Original Article

Authors

Electrical Engineering Department of K.N. Toosi University of Technology Tehran, Iran.

Abstract

Abstract:
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 torque density is an important parameter in applications. So,
comparison of torque 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 torque density is illustrated. Finally a high
torque double-sided slotted AFPM motor is introduced in the paper.

Keywords