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DISCOUNTED WEBINAR RECORDING BUNDLES AVAILABLE LEARN MORE

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Webinar Recordings

DC Machine Data Sheet

  • December 2020
  • Number of views: 1141
Form/Worksheet

EASA's DC Machine Data Sheet provides all the fields necessary on a simple one-page form to accurately record all the details about the machine being repaired.

DC Motor Electrical Procedures

  • April 2020
  • Number of views: 685
Webinar recording bundle

A special discounted collection of 6 webinar recordings focusing on DC motor electrical procedures.

Just $30 for EASA members!

DC Machine Inspection Report

  • August 2016
  • Number of views: 1636
Form/Worksheet

A convenient incoming inspection report for basic DC motor conditions and test values.

DC Machine As-Received Connection Form (2-, 4- and 6-Pole DC Machines)

  • August 2016
  • Number of views: 606
Form/Worksheet

This inspection report helps record a DC motor's connection as it enters the service center. It is intended for use with 2-, 4- and 6-pole DC machines.

What’s new in the IEEE 43 insulation resistance testing standard?

  • April 2016
  • Number of views: 3311
Article

The Institute of Electrical and Electronics Engineers (IEEE) standard for insulation resistance testing of motor and generator windings that was published in 2002 has been revised. The 2013 edition was published in March 2014. This article examines the changes to the standard.

Keeping it cool: A look at causes of motor overheating

  • March 2015
  • Number of views: 1117
Article

We know that excessive temperature and moisture are the largest contributors to bearing and winding failures. Understanding the source of the increased temperature will help us to correct the problem and improve the machine’s life expectancy.

Interpole strength: Determining correct number of circuits

  • February 2007
  • Number of views: 596
Article

A conversation with two EASA members led to a method for determining whether the interpoles are connected with the correct number of circuits. Not only is this method easy, it's a refinement of the interpole polarity test we routinely perform on every repaired DC machine.

Interpole shims: Proper placement prevents arcing

  • November 2006
  • Number of views: 708
Article

Have you ever wondered about the purpose of the shims found under the interpoles in most DC machines? Those shims are used by the manufacturer to adjust the interpole strength. If they are lost, left out or mixed up, the result will be a DC motor or generator that arcs - especially when loaded.

Training Film 21: Testing DC Machines

  • June 1987
  • Number of views: 288
Video

Training Film 19: Layer-Winding DC Field Coils

  • June 1985
  • Number of views: 202
Video

Covers all necessary steps for layer-winding DC field coils, how to layer-wind a shunt field coil, how to reinsulate an interpole field coil, and how to install large field coils in the frame.