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Article

Interpole shims: Proper placement prevents arcing

  • November 2006
  • Number of views: 7353
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Chuck Yung 
EASA Technical Support Specialist 

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.

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ANSI/EASA AR100

More information on this topic can be found in ANSI/EASA AR100
  • Section 3: Rewinding

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

Fundamentals of DC Motors & Operation Tips
  • Section 7: Frames
  • Section 9: Motor Assembly & Final Testing

Categories: DC motors, Interpoles
Tags: Interpoles
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