Evaluation of the Design Options and Cost Impact of Improving Induction Motor Efficiency

Aim of the paper is the evaluation of the manufacturing cost to move a motor from one efficiency class to the next one, with reference to the European Commission and CEMEP (European Committee of Manufacturers of Electrical Machines and Power Electronics) classification scheme: the analysis deals with low voltage three-phase, 4 pole, induction motors in the 0.76÷90 kW power range. For each movement, the low cost design has been chosen, by considering several design strategies.