delta connected squirrel cage induction motor

Discussion in 'Homework Help' started by Nikoz121, Apr 23, 2015.

  1. Nikoz121

    Thread Starter New Member

    Mar 17, 2015
    4
    0
    The following set of results was obtained for a delta connected squirrel cage induction motor with a line to line voltage of 400V. Calculate the efficiency of this motor, plot a graph of the results and explain your findings.

    [​IMG]

    Hello, I've got this problem and I've been able to work out the output power using the formula P= (2pi * Torque * speed) / 60 and I also think I have work out the input power but I'm not sure if I'm doing right since I am getting a very very low efficiency for each reading. I have used the formula P = sqrt(3) * I_L * V_L * PF.

    Is the efficiency suppose to be that low? Thank your very much for your help
     
  2. t_n_k

    AAC Fanatic!

    Mar 6, 2009
    5,448
    782
    Were the measured power values taken on a per-phase basis?
     
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