Fabrication and investigation of copper rotor bar on 0.5HP induction Motor-A performance and economical study

Abstract

The paper deals with the fabrication of copper rotor bars for 0.5HP induction motor and then comparing it with the existing aluminium rotor bars. From this experiment the rotors are compared in terms of efficiency increment as well as losses reduction capabilities and an economical aspect is analyzed and explained. From this investigation it shows that copper rotor bars losses are reduced to ± 5 watts and 1% efficiency increment compared to aluminium rotor bars. The copper rotor has an annual energy savings (AES) of 40.32kWh/year per motor and total saving cost (TSC) per copper rotor motor is RM13.54. Finally a rough estimation of 100,000 pieces induction motor that have been replaced with the copper rotor bars is assumed and shows that it will save approximately RM1.3 million.