Answer to Question #224596 in Mechanical Engineering for Unknown346307

Question #224596

A 3-phase, 4 pair of poles, 400kW, 400V, 60Hz induction motor is 780 rpm full-load speed.

Determine the frequency of the rotor current under full load condition


1
Expert's answer
2021-08-09T08:05:14-0400

fr=sf

ns="\\frac{120f}{p}=\\frac{120*60}{8}=900rpm"

s="\\frac{n_s-n}{n_s}=\\frac{900-780}{900}=0.1333"

fr=sf

=0.1333*60

=7.998 Hz


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