Question
Download Solution PDFA 6-pole induction machine is working as an induction generator. If the supply frequency is 60 Hz and the rotor current frequency is 5 Hz, find the speed of the rotor.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept
The frequency of EMF induced in an induction motor is given by:
\(f_r=sf_s\)
The speed of an
where, fr = Rotor induced frequency
fs = Supply frequency
s = Slip
The speed of a 3ϕ induction generator is given by:
\(N_r=N_s(1+s)\)
\(N_r={120f_s\over P}(1+s)\)
Calculation
Given, fr = 5 Hz
fs = 60 Hz
\(5=s\times 60\)
\(s={1\over 12}\)
\(N_r={120\times 60\over 6}(1+{1\over 12})\)
\(N_r=1300 \space rpm\)
Last updated on May 29, 2025
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