Análise de perturbações num elevador de tensão mediante wavelets.

Abstract

The industry of the high power electronics produces diverse devices in order to raise the tension, between which the growing tension devices DC-DC, DC-AC, aiming at to decide the problem of lack of space in hybrid cars. In this work it is analyzed some types of disturbances in an elevator of tension DC-DC, especially of the type voltage disturbances. The aim is to establish an analysis by means of a methodology that uses discrete wavelets transforms, experimentation, simulation, multivariate analysis, in order to get a better knowledge of the most frequent disturbances in a tension elevator, and thus to plan the improvement in the quality of systems of high power electronics. After to establish a study on a boost converter with basic topology, the purpose is to study diverse variations in the input voltage, and to observe how it changes the output tension. Then, it is applied a discrete wavelets transform, whose average sub-signals a6, conserve the characteristic properties of the original signal, forming a database that, in this way, will be submitted to the techniques of multivariate analysis (principal components analysis, PCA), allowing a basic classification of the signals. The inverse problem of recognition of the input signals is carried through by means of the reconstruction of the signal having applied the corresponding inverse wavelets transform.