Estudo comparativo entre métodos para cálculo de eficiência energética de máquinas de indução trifásica

Abstract

Given the growing demand for energy efficiency in the industrial sector, this paper proposes a comparative analysis of different methods for calculating the efficiency of three-phase induction motors. These motors are widely used in industry and account for a significant portion of electricity consumption. Considering this importance, this study evaluated five efficiency determination methods: nominal value, current, segregated losses, slip, and air-gap torque, applied to motors in healthy conditions and with a 10% stator short-circuit fault. The methodology involved the use of experimental data collected in the laboratory using Matlab software. The results indicate that, although all methods allow for efficiency estimation, some offer greater accuracy and sensitivity, making them more promising alternatives under different operating conditions. The conclusion is that efficiency calculation methods should be applied as auxiliary analysis tools, essential for improving the monitoring of induction motor energy efficiency, contributing to optimizing performance in industrial facilities.