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Published March 3, 2026 | Version v4
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A Novel Self-Cooling Electric Motor Topology Integrating Magnetocaloric Yoke Driven by Intrinsic Alternating Magnetic Fields

Authors/Creators

  • 1. Independent Researcher

Description

This paper proposes a solid-state thermal management architecture for high-power-density electric
motors. By replacing the conventional silicon-steel stator yoke with magnetocaloric effect (MCE)
alloys, the yoke itself functions as an active heat pump. The intrinsic high-frequency alternating
magnetic fields generated by rotor rotation drive an Active Magnetic Regenerative (AMR) cycle,
providing self-regulating cooling that scales with motor speed. This eliminates the need for liquid
coolants, pumps, or additional moving parts. Preliminary thermodynamic analysis and comparison
with existing literature indicate potential advantages in mass, reliability, and efficiency for extreme
mobility applications.

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