Diagnóstico de barras quebradas em motores de indução trifásicos através da análise da densidade de máximos do sinal de corrente

Abstract

The three-phase induction motor (TIM) is present in most industrial processes, being the main responsible for the electromechanical conversion in the sector. The total breakdown of these machines can compromise the production of entire sectors in a manufacturing environment, hence the need for early fault detection. Bar-break failures are the most common on the TIM rotor. The present work analyzes the chaotic behavior of an TIM, with different levels of broken rotor bar failures. The characterization of the failure is performed by analyzing the behavior of the chaotic variable called density of maxima. The proposed approach has advantages over classic Motor Current Signature Analysis techniques in that it does not require long acquisition windows and enables fault detection even for motors operating under variable load or with low slip. The technique methods, using small acquisition intervals (in this article 0.035 seconds). The obtained results prove the efficiency of the method, being able to identify failures and its severity level.