ELECTRICAL STEELS FOR HIGH-EFFICIENCY MOTORS

The aim of this paper is to evaluate the influence of electrical steel s on the efficiency of three-phase induction motors. A computer proced ure has been developed to predict motor performance with different ele ctrical steels and to optimise motor design in order to reduce operati ng costs. Significant variations in rated efficiency have been found a nd the choice of electrical steels has turned out to be an important f actor in motor design. The paper presents the proposed analysis and th e principal results obtained in the case of two motor sizes (1.5 and 7 .5 kW) and six different electrical steels.