Identificação on-line de motores de indução através de modelo discreto para sinais senoidais
AUTOR(ES)
Sandro Mauro Ferrari
DATA DE PUBLICAÇÃO
2006
RESUMO
In this work are developed two on-line identification methods for three-phase induction motors based on discrete models obtained when we consider continuous systems excited by sinusoidal signals. The first method uses the discrete model of the homopolar machine in the stationary frame to estimate the stator resistance and the stator dispersion inductance and the discrete model of the linear system existent among the stator flux and current in the rotor frame to estimate all the electric parameters of the motor. The second method, besides this last model, presupposes to estimate the stator resistance with DC excitation added to the supply voltage of the motor and the knowledge of the motor class, in order to estimate the other electric parameters through classical methods of least squares parameters estimation. The two methods presuppose the estimate of the rotor frame signals from measurements of stator currents in the stationary frame and measurement of the rotor angular velocity. Simulation and experimental results illustrate the proposed methods.
ASSUNTO(S)
estimação de parâmetros automação industrial automacao eletronica de processos eletricos e industriais motores elétricos de indução identificação on-line controle vetorial modelos discretos identificação de sistemas
