Axial Flux Motors Heat Up and Expand — Will the Ultra-Thin Air Gap Be Squeezed Out?

Aug 25, 2026 594

When the air gap is compressed to the millimeter level, the motor interior soars from room temperature to over 100°C during operation; aluminum housing, steel shaft, copper wire, and magnets have different expansion coefficients, and axial deformation may widen the air gap.

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