Modelagem numérica de um motor de indução trifásico aplicado ao diagnóstico de defeitos em barras de rotor e enrolamentos de armadura

Abstract

This work presents the development and analysis of a numerical model of a threephase squirrel-cage induction motor (IM) based on the Finite Element Method (FEM), implemented in Ansys Maxwell. The study aims to investigate the motor performance under both healthy conditions and specific fault scenarios, including broken rotor bars and stator winding defects. Several fault severities and load conditions were simulated, and the numerical outcomes were validated against experimental measurements and theoretical results reported in the literature. Frequency-domain analyses of the stator current signals, performed using the Fast Fourier Transform (FFT) and the Motor Current Signature Analysis (MCSA) technique, enabled the identification of faultrelated spectral components, confirming the accuracy of the proposed model. Additionally, the application of symmetrical components was assessed as a complementary diagnostic approach. The obtained results exhibit strong agreement between simulation and theory, demonstrating that the developed FEM-based model is a reliable and effective tool for fault detection and diagnosis studies in three-phase induction motors.