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Copper Motor Rotor
Copper Rotors Cast Vertically - The R&D effort led by CDA has demonstrated that the die-casting of copper motor rotors can be a viable industrial practice from both technical and economic standpoints. Numerous technical obstacles have been overcome along the way, not the least of which was die checking, solved through a method (now patented by CDA) that ensures long die life. Problems with porosity have also been addressed, first through computer-aided modeling and then by tweaking those mathematical results in actual casting practice. Finally, problems with variable electrical conductivity were successfully resolved by carefully protecting the molten charge from oxidation.
Update: Copper Motor Rotor is published monthly by the Copper Development Association Inc. to provide current information of interest to those in the electric motor and related industries. CDA assumes no responsibility or liability in connection with this publication and makes no warranties of any kind with respect to the information contained herein.