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Convention presentation

Carbon Brushes and Commutation: A Practical Approach to Failure Analysis

  • June 2013
  • Number of views: 8166
  • Article rating:

Jerry Lipski
Jerry Lipski, LLC
Scheerville, IN

Ever run across brush arcing or vexing commutation issues? This paper, presented at the 2013 EASA Convention, covers:

  • Definition of commutation
  • Basic magnetism
  • Commutation and AC in a DC armature core
  • Brush construction
  • The basic commutator and placement of carbon brushes
  • Carbon brush arcing; what are the brushes telling you? + field case studies
  • Sanding brushes
  • Most common surface conditions
  • Field experiences with drives
  • Brushholders
  • Slip ring application
  • Field settings (neutral, tape method)
  • Field/service center testing

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