Motors with Copper Rotors Can Cost Less to Produce

Lower Materials Cost + Smaller Frame Sizes = Double-Digit Savings

Substituting copper for aluminum in electric motor rotors can either: (a) increase electrical efficiency when motors are held at the same size, or (b) reduce size and weight when horsepower and/or efficiency are held constant. For example, several motor manufacturers who directly substituted copper for aluminum saw significant increases in efficiency in an agricultural irrigation application. Designers can also trade off efficiency, size and power against each other to optimize motors for given applications.