Starting form an existing induction motor, which was tested according to an international standard, an optimized model is developed in order to reach higher energy efficiency. The optimization procedure is based on the analytical model of the machine. Hence, the first step is to develop the model and to compare the results with the data provided by the international standard for validity purpose. The next step is to introduce the analytical model equation into the optimization process. Then, the results of the optimization are checked against the finite element method.