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Correctly interpreting the DC nameplate

  • July 2002
  • Number of views: 4407
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Chuck Yung 
EASA Technical Support Specialist 

If you have ever tried to figure out the field re­sistance from the information on a DC motor nameplate, you probably wonder what in the heck the manufacturer was thinking! You know Ohms Law, but the nameplate information just doesn’t seem to follow it. 

Ohm’s Law: R = E/I 
I = E/R 
RI = E 
Where R = resistance E= voltage I= current

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Categories: DC motors, Nameplates
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