Process Control and Thixoforming of Cu Rotor for High Efficiency Motors

고효율 전동기용 Cu Rotor의 반응고 성형과 공정변수 제어

  • 정우성 (창원대학교 재료공학과) ;
  • 이상용 (안동대학교 신소재공학부) ;
  • 신평우 (창원대학교 재료공학과)

Abstract

Rotor in small-medium induction motor has been usually manufactured by aluminum diecasting. In order to improve the efficiency of induction motors, newly developed Cu-Ca alloys have been investigated. The electrical conductivity in the Cu alloys containing Ca less than 1.0wt%1.0wt% was higher than 80%80% IACS. Cu-Ca alloy is desirable for the thixoforming process because it has wide semi-solid range over 150∘C150∘C. In this study, Cu-rotor with thixoforming process was developed to replace the conventional aluminum diecasting rotor. Analysis was performed for the microstructure of thixoforming rotor. Effect of incomplete filling on the efficiency of induction motor was discussed.

Fig2 Rotor core assembly(A) and squirrel cage(B)
Fig2 Rotor core assembly(A) and squirrel cage(B)

Keywords

Cu Rotor;Thixoforming;Semi-solid Metal Forming;High Conductivity Copper Alloy;SIMA Process;Cu-Ca Alloy

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