Dissertação
Previsibilidade de falhas em capacitores do barramento c.c de inversores de frequência
Fecha
2012-09-21Autor
Fernando Cláudio de Oliveira
Institución
Resumen
Initially, this work presents considerations about application of electrolytic capacitors in
the industry, especially in the inverters D.C. bus, and how important is to identify in advance
failures related to deterioration and wearout of these devices.
After that, it is presented some maintenance’s concepts and the whole process of
building an aluminum electrolytic capacitor, discussing its main features, applications and
their failure modes. Some previous studies regards predicting lifetime are also analyzed in
order to create the theory that form the basis for the proposed failure’s prediction in these
components.
Finally, after some simulations and experiments, is then proposed a procedure to apply
on frequency inverters, which will enable predictive maintenance based on evolution of
lifetime of aluminum electrolytic capacitors.