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Homework Help: Induction Motor, Parameter Test

  1. May 22, 2010 #1
    1. The problem statement, all variables and given/known data
    I just gave an exam where one of the questions was where I had to find the various parameters using the two forms of tests for an Induction motor:

    No load test

    Locked rotor.

    Now, I can do this question but there is one thing that is confusing me. I had to find the stator core loss resistance, Rc. I was given the input power (450W) and I was also given the windage losses (300W).


    2. Relevant equations

    To find Rm, I use P = V^2/Rm

    I am confused about whether I should use the input power or input power + windage losses?

    I think it should be input power as it includes the windage losses anyway, no?

    Here is the circuit:

    Screenshot2010-05-22at62027PM.png
     
    Last edited: May 22, 2010
  2. jcsd
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