Sistemas de acionamento estático usando máquinas de indução polifásicas.

Abstract

Drive systems for alternating current (AC) electrical machines with more than three phases is being more explored in the technical literature. Due to the increased number of phases such systems presents a higher degree of freedom when compared with a three-phase system. This characteristic turns them a more flexible structures. This can be seen in the modulation strategies (more number of states of switching), tolerance to faults, estimation of parameters, etc. In this work four-phase and five-phase systems are studied under several aspects. Studies with five-phase machine were carried out, especially PWM strategies using the spatial vector approach; fault tolerance topologies, in which one or two phases or legs of the converter were lost or damaged, beyond that topologies with reduced components were presented. For the four-phase machine are performed some studies about structures with reduced number of components. The proposed systems for four- and five-phase machines with reduced number of components are AC — AC converters that operate without boost inductors filters. Computational simulation and experimental results are presented validating the proposed systems.