"smitha4u" wrote in message
ps.com...
Hi
Thank you all I agree with after reading all the messages that i
really
did not think of all the measures and questions. Could some body
educate me what more i need to know.
before testing I think i need to prepare a test plan/procedure and
what
all will i calculate and how i will show my demonstration. If they
agree my experience with dealing large machines is not sufficient
atleast they would see my test plan and do the test with some
expeerienced.
Hope i get some help and appreciate all for the info provided.
Regards
smitha


As you have seen from the replies, there's various ways to determine
motor constants.You need to tell everyone what you DO know about DC
motors first. Are you familiar with the basic DC motor equations? What
are the capabilities of the lab-any equipment to measure large torques
and currents?

The electrical and mechanical input/output levels you will be dealing
with can be lethal. If this is for a school lab project I'd suggest
you consider a 12 volt permanent magnet motor from a car (engine
cooling fan or blower motor) and determine the motor constants.