Implementação de um modelo para análise dinâmica de motores assíncronos trifásicos

Abstract

This paper is about the implementation of a mathematical computational model for the three-phase induction motor, capable of simulating its dynamic behavior during the transient regime. It is possible through the model, to predict its behavior during the transitional phase, like torque and current oscillation, making what happens to the machine in adverse situations foreseeable, so that precautions can be taken to minimize or eliminate any damage that could eventually happen. To obtain the threephase induction motor dynamic model, transferring the stator and rotor variables from a stationary three-phase reference frame to an arbitrary rotational reference frame was necessary, using the Park transform, which is used in the equations that determine the behavior of a three-phase induction motor, aiming to obtain the model for dynamic analysis. With the equations of the in the qd0 axes the model was implemented in the software MATLAB/Simulink. Through the simulations it was possible to verify the model’s veracity, being the obtained results the ones expected. Then simulations of three-phase fault, torque increase and decrease and voltage decrease were made.