Recent market and technical trends in Copper Rotors for High-Efficiency Induction Motors

This paper will introduce the recent progress in Copper Rotor Motor in China. The development of IE4 and IE4+ copper rotor motors are introduced, and the detailed performance analysis is given. A compacted motor design which use copper rotor for pumps and escalators is introduced. The technical and economic analysis is also given. A pilot project which used rotor replacement technology to improve the installed motor efficiency will be presented from both technical and economical point of view. The total energy saving potential and the possibility to develop a new efficiency standard for the motor rebuilt will be discussed.