Experience in China on the die-casting of copper rotors for induction motors

This paper introduces the recent technological progress in China on the manufacture of die cast Copper Motor Rotors (CMR) for induction motors. This manufacturing process provides a simple and practical means for large-scale economical production of high-efficiency induction motors. Rotor die casting obstacles/solutions are presented along with analyses and technical characteristics of cast copper rotor motors. The paper covers examples of the use of cast copper rotors in both high efficiency single-phase motors and IE3/IE4 motors.