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The realization of a vector control for the operation of induction motors often takes advantage of ordinary equivalent circuit models. Some simplified models are consisting of a reduced number of system parameters and allow a very basically identification procedure by no-load tests in the lab. Fictive identification tests could fortunately be carried out by the finite element method during the development and optimization process, without the necessity of cost-extensive prototyping. Deviations between the numerically predicted controlled system behavior and the required features could be found and eliminated in advance.