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Table 2 Advantages and disadvantages of various AFPMSM structures

From: Review of Design and Control Optimization of Axial Flux PMSM in Renewable-energy Applications

Structure

Advantages

Disadvantages

SSSR

Simple structure, good heat dissipation

Large axial magnetic pull, low efficiency, Easy to damage

Torus

Torus-NS

Low torque ripple

High production cost

Torus-S

Small iron loss

Large current ripple, difficult to control

AFIR

Small moment of inertia, High torque density

Large hysteresis loss, Large eddy current loss

Multi-disc

High output power, high power density

Large space occupancy