Desenvolvimento de modelos dinâmicos para sistemas de acionamentos baseados em máquinas de indução duplamente excitadas

Abstract

The growing necessity to use resouces has provided considerable investments in the industrial sector, so that large enterprises are implemented in different segments.The development of these activities brings the necessity to make studies in order to apply the best technique, always seeking a solid cost-effective. Doing that the enterprise has a great chance to achieve ecient results.The AC machine speed control has in many industrial sectors an extensive practical application and its development is linked with the power electronic evolution. One of the earlier machine speed control method is the insertion of rheostat in the doubly fed induction machine (DFIM) rotor circuit.The DFIM is a good alternative for application where the speed control with a limited operation range is required. This is because the rotor circuit power (slip power) is only a fraction of the machine power and it makes possible to use converters that use less power. Such application can be implemented in highcapacity ventilation drive and pumps, wind turbines, generators, among others.The model simulations have a fundamental importance to provide a better analysis and behavior understanding of the developed systems. Due to this fact, this study aims to develop dynamic models to simulate the doubly fed induction machines.Initially, the development of a theoretical study about DFIM aims to provide important concepts related to this. Given this fact, doubly fed induction machines drives models, were presented, among them static Kramer drive, Scherbius, with cycloconverter and with variable frequency drive. Faced with all this information the implementation of the models was performed.