Evaluation of the performance of a simplified thermal model of a three phase induction motor submitted to voltage imbalances

Three-phase induction motors (TIM) have a great weight in the load of electrical systems all over the world. The modeling of this equipment is fundamental for the planning of their applications. The temperature at which this machine operates is a quantity whose analysis becomes important in power quality studies, since it has a direct influence on the lifespan of such equipment. This paper compares the results of the measured temperatures of a TIM in laboratory when submitted to several conditions of voltage unbalance, like those from i) the use of a simplified thermal model and ii) an Artificial Neural Network (ANN). With this, it is possible to identify the most effective strategy for simulations involving voltage unbalance.