Power density comparison for various types of non-slotted double-sided axial flux PM motors

Document Type : Original Article

Authors

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

Abstract

Abstract:
There are two topologies for non-slotted double-sided axial flux PM (AFPM) motors.
The stator of the non-slotted AFPM machine is realized by non-slotted tape wound core
with AC polyphase air gap windings and the rotor structure is formed by axially
magnetized fan-shaped surface mounted Neodymium Iron Boron (NdFeB) permanent
magnets. 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 non-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.
Finally a high power non-slotted double-sided AFPM motor is introduced in the paper.

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