Electrical

Copper Motor Rotor Project

The use of copper for the conductor bars and end rings of induction motors in place of aluminum results in attractive improvements in motor energy efficiency. Until recently, die cast motor rotors were universally produced using aluminum because rotor fabrication by aluminum pressure die-casting was an established practice, and copper pressure die-casting was unproven. This project has identified and demonstrated design methods, manufacturing process parameters, and durable mold materials that have enabled economical production of die-cast copper motor rotors.

The Copper Motor Rotor (CMR) Project is funded by the International Copper Association Ltd., 260 Madison Avenue, New York, NY 10016 USA, and by the Copper-Based Casting Technology Program managed by ATI, 5300 International Boulevard, North Charleston, SC 29418.

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