242 Computation and Experiment of the Eddy Current Losses in Canned Motor Available to Purchase

Induced eddy currents in can cause losses when the canned motor runs. The losses lead to the motor's temperature rise, which directly affects the canned motor pump and the entire transmission system security. Empirical formula estimates eddy current losses which has a big error is difficult to meet the engineering requirements. For the canned motor with Hastelloy-C alloy or Sus316L cans, electromagnetic field is analyzed and can losses are calculated using a finite element method in Ansoft. The paper developed four prototypes, and obtained the experimental value of can losses via simple no-load experiment by the loss separation method. The results show that the accuracy of FEM is higher accurately than empirical formula compared with simulation value. Analysis shows that dimension of a model and can material characteristic parameters such as the resistivity have influence on the calculated error of FEM. The paper proposes to correct the error in the case of considering can material characteristic parameters.