COMPARATIVE ASSESSMENT OF COST AND PERFORMANCE IN REPLACING COPPER BY ALUMINIUM IN POLYPHASE INDUCTION MOTORS

Abstract

The replacement of copper by aluminium in polyphase induction motors has boon studied In the toUUoving s tope Repltceasnt of c+ pper cond'uc r$ in both stator and rotor of a machine with those of a1mLntum conductors of the same size. (ii). For 9 4ven r-attng and stater ohmic bless fresh designs are made with copper and alum conduct rs and the performance and cost in both cases are compared. For 4Own ratings peztormanc. and temperature rise optimised deem are obtained for the cuss (a) wber copper .conductors are used in both stator s d rotor and (b) when aluminium* conductors are used in both stator and rotor. Direct search t.chni Niue is used for opt ,nation. fesuits in both the eases are compared.