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The Incredible Precision Behind EV Motor Laminations

At the heart of every electric vehicle (EV) motor lies a component whose precision is paramount to efficiency: the stator and rotor core, built from thousands of thin, stacked steel laminations. These are not simple metal discs; they are the first line of defense against energy loss. The fundamental reason for using laminations instead of a solid block of steel is to combat eddy currents. When a solid metal core is subjected to the motor's rapidly changing magnetic fields, it acts like a short-circuited turn, generating swirling currents that produce significant heat, wasting energy and reducing efficiency.

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