Simulação e controle de uma máquina de relutância variável tipo 6/4

Abstract

This work presents the development of a simulator for a 6/4 switched reluctance machine (SRM) used in the laboratory. This machine was totally designed and built by professors and university students, and it was realized the necessity of a simulator considering the parameters and non-linearities of this particular machine. For this, the mathematical modeling, the characterization of the mechanical parameters and the definition of the inductance profile for the implementation of a lookup table from past works, the elaboration of the drive circuit based on the asymmetric half-bridge converter, the study and application of drive logic for current control, soft and hard switching of the phase, as well as high speed drive with single pulse control. There is also the possibility of applying different types of loads to the machine, having a constant linear and quadratic characteristic, as well as operating as a primary machine of a DC generator that is coupled to the SRM axis and which feeds a variable resistance bank. Another type of perturbation implemented is the lack of phase, and can be applied at any given time for any phase. To validate the implemented simulator, two speed controllers with different expected performance were developed and the robustness of each was analyzed. Finally, in order to test the effectiveness of the simulator, the two speed controllers were applied in the simulator in the condition of application of load in the generator DC and phase failure and then in the real machine under the same conditions. The experimental results of velocity remained within the values observed in the simulator, while the reference current generated by the controller of simulator presented close values when operating around the point of identification of the plant. The comparison of the data proved the efficiency of the simulator.