Question
Download Solution PDFA 4 pole, 50 Hz IM operates at 7% slip. The frequency of EMF induced in the rotor will be ________.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept
The frequency of EMF induced in an induction motor is given by:
\(f_r=sf_s\)
where, fr = Rotor induced frequency
fs = Supply frequency
s = Slip
Calculation
Given, s = 7%
fs = 50 Hz
\(f_r={7\over 100}\times 50\)
fr = 3.5 Hz
Additional Information The slip 's' is given by:
\(s={N_s-N_r\over N_s}\)
Ns = Synchronous speed
Nr = Rotor speed
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