Resumo

CORTES, Camilo Andrés; DEPREZ, Wim; DRIESEN, Johan  e  PEREZ, Jhon J.. Determining electrical loss in electromagnetically-modelled induction motors using the finite element method. Ing. Investig. [online]. 2008, vol.28, n.3, pp.64-74. ISSN 0120-5609.

This paper shows the pattern of a 7.5 kW squirrel-cage induction motor’s electrical loss in balanced and unbalanced conditions, modelling the motor using the finite element method and comparing the results with experimental data obtained in the laboratory for the selected motor. Magnetic flux density variation was analysed at four places in the machine. The results so obtained showed that the undervoltage unbalanced condition was the most critical from the motor’s total loss point of view. Regarding variation of loss in parts of the motor, a constant iron loss pattern was found when the load was changed for each type of voltage supply and that the place where the loss had the largest rise was in the machine’s rotor.

Palavras-chave : induction motor; unbalance; electrical loss; finite element method.

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