Estudo do Impacto da Falha de Diodos de Pontes Retificadoras Rotativas em Geradores Brushless

  • Thiago B. Pierini Petrobras, Regap, MG
  • Pedro H. A. de Oliveira Universidade Federal de Minas Gerais, BH, MG
  • Cláudio A. Conceição Petrobras, Regap, MG
  • Braz de J. Cardoso Filho Universidade Federal de Minas Gerais, BH, MG
  • Thales A. C. Maia Universidade Federal de Minas Gerais, BH, MG
Keywords: Generator, synchronous, brushless, exciters, rotating diodes. Palavras-chaves: Gerador, síncrono, excitatriz, diodo rotativo


Brushless synchronous generators are increasingly widespread in the installed park of industries and small power generation plants. Rotating diodes are considered the main components of the exciters that supply the field windings of these generators. The reliability and availability of power generation are strongly related to the exciter function. The difficulty of access, as they are components that rotate with the axis, makes it impossible to carry out predictive/detective maintenance. The present work presents a study of the impacts of diode failures of rotary rectifier bridges on operating voltages and currents of brushless generators, for comparison with a machine in perfect condition.