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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, Current Density and Performance

  • June 2019
  • Number of views: 11116
  • Article rating: No rating

Presented by Chuck Yung
EASA Senior Technical Support Specialist

The lowly brush is underrated and misunderstood. The brush grade, brush pressure and spring tension, as well as the effect of load and humidity are each important to brush performance in DC machines, wound rotor motors, and synchronous machines.

This presentation covers:

  • Importance of brush grade
  • Effect of humidity and load (current)
  • Best practice method for removing brushes to improve performance
  • Brush pressure & spring tension by application
  • Supplemental cooling of slip ring / brush enclosures

This presentation will benefit service center technicians and supervisors.

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EASA Technical Manual

More information on this topic can be found in EASA's Technical Manual
  • Section 3: DC Machines

Related Reference and Training Materials

Root Cause Failure Analysis
  • Section 7: DC Motor Failures

Fundamentals of DC Motors & Operation Tips
  • Section 1: Nomenclature & Nameplate Information
  • Section 3: Disassembly & Repair Tips
  • Section 8: Ventilation & Accessories
  • Section 9: Motor Assembly & Final Testing

Tags: DC Brushes Slip rings Brush pressure/spring tension
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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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