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ANSI/EASA AR100-2020 cover

ANSI/EASA Standard AR100-2020
ANSI/EASA AR100-2020: Recommended Practice for the Repair of Rotating Electrical Apparatus is a must-have guide to the repair of rotating electrical machines. It establishes recommended practices in each step of the rotating electrical apparatus rewinding and rebuilding processes.

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Questions?

For information about ANSI/EASA AR100 or questions about the work on this standard, contact:

Mike Howell, PE
EASA Technical Support Specialist
+1 314 993 2220
mhowell@easa.com

ANSI Accredited Standards Developer Information

Carbon Brushes and Commutation: A Practical Approach to Failure Analysis

  • June 2013
  • Number of views: 10215
  • Article rating: 4.3

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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Related Reference and Training Materials

Root Cause Failure Analysis
  • Section 7: DC Motor Failures

Fundamentals of DC Motors & Operation Tips
  • Section 6: Commutators
  • Section 10: On-Site Troubleshooting
  • Section 11: Failure Analysis

Tags: Brushes Brushholders Commutators
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EASA Rewind Study cover

The Effect of Repair/Rewinding on Premium Efficiency/IE3 Motors
Tests prove Premium Efficiency/IE3 Motors can be rewound without degrading efficiency.

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EASA Good Practice Guide

Good Practice Guide to Maintain Motor Efficiency
Based on the 2019 and 2003 Rewind Studies of premium efficiency, energy efficient, IE2 (formerly EF1) and IE3 motors

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