Controle discreto em tempo real do motor de indução.

Abstract

The aim of this dissertation is to investigate the discrete control of the induction motor for real-time applications. Discrete induction motor models are developed powered by a voltage inverter in which the stator voltages are replaced by arm width pulse widths of inverter. Aspects of discretization error and sampling frequency are examined in detail. THE numerical stability of the models is investigated through the of discrete root locations in order to establish the validity theorists. Using the discrete model, a control by finite settling time - a sample of front for the stator chains is developed. THE current controller is examined in the Z plane and the sensitivity to parametric variations is verified. An observer of reduced order rotor flux using only samples of current and velocity is projected in the discrete domain. The poles of the observer are positioned in order to obtain an observer robust for variations in rotor resistance. The direct drive field control of the induction is simulated to check the validity of the proposed. The complete simulation includes the current controller with deadbeat response, flow observer and controllers deadbeat of flow and speed. The simulation results are satisfactory. Aspects of real-time implementation of the algorithm are examined.