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May 4, 2026ActuatorsOpen Access

Design and Analysis of an Axial Flux Permanent Magnet Synchronous Motor with a Stepped Stator Structure for Cogging Torque Reduction

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Randomized trial examines cogging torque reduction in axial flux permanent magnet synchronous motors, suggesting a new design approach.

This study aims to reduce cogging torque in axial flux permanent magnet synchronous motors using a novel stepped stator structure.
Proposed a stepped structure with radial stacking of electrical steel sheets.
Conducted 3D finite element analysis to validate the design.
Focused on optimizing cogging torque and back-electromotive force (EMF).
Cogging torque was reduced to approximately 86% of the conventional model’s value.
Back-EMF reduction rate maintained within 5% of the conventional model.
Demonstrated a novel skewing technique without specialized 3D machining.

Ko et al. (2026) studied this question.

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