A novel evolutionary based in-situ efficiency estimation technique for induction machines working with unbalanced supplies

In-situ efficiency estimation techniques are becoming more attractive due to necessity of efficiency assessment as a demand side energy management tool. Numerous techniques have been proposed to estimate the efficiency of an induction motor in-situ. However, only a few are really practical considering the level of intrusion and the accuracy. Besides, very little was done to make these methods compatible with the unbalanced supply condition which is the real case in most industrial applications. In this paper a new evolutionary based in-situ efficiency estimation technique, capable of dealing with unbalanced power supply conditions without the requirement of the no load test is proposed. The effectiveness of this method is verified by experimental results.