Oh yes, it is the "standard method" taught in my electric machine
course and the power electronics course. 

Anyway electrical power engineering is really not hot in USA and
the Electric Power Engineering Department in RPI is now part of ECSE.
They used to have about 100 graduate student in the 90s and now only
has less than 10 students.

Since the demand is not high so it may still be okay. Power electronics
are a bit better than electric power engineering though. Anyway a
lot of engineers dealing with power supply never have formal education
in power electronics. :( 

Xiaofan

>Date: Sun, 09 Jan 2005 16:35:05 -0500
>From: Martin K <martin-distlists@nnytech.net>
>
>Spehro Pefhany wrote:
>
>> Another tack is to apply a load, allow some hours for the transformer
>> to heat up thoroughly, then disconnect it (!) and measure the winding
>> resistance. Compare with the winding resistance cold. The resistance
>> will increase by about 3850 ppm/K. Solve for average temperature of
>> the winding.
>
>Ingeniuous - I wouldn't have thought of that.
>
>-- 
>Martin K
>http://wwia.org/sgroup/biofuel/
>------------------------------
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