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Resistance measurement

Resistance measurement

Resistance measurement

(OP)
Can anyone tell me how the temperature correction factors are derived for correcting resistance to 25C in an electric motor?

thanks, mb

RE: Resistance measurement

Assuming it is a copper winding, the resistance temperature coefficient is 1/234.5 per deg C at 0 deg C.


R2 = (R1)*(234.5+T2)/(234.5+T1)

Where R1 is the known (or measured) resistance at temperature T1 deg C

T2 is the temperature in deg C for which you want to know the new resistance R2

*Even inside a hard-boiled egg, there is a golden heart!!!*

RE: Resistance measurement

(OP)
Thanks edison,

Now the next question.  Is there a temperature correction factor that can be applied to the viscosity of varnish in order to standardize the measurements?  If so, do you know what it might be?   Thnaks, mb

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