Question
Download Solution PDFThe number of poles of a three-phase induction motor running at 750 rpm with 50 Hz frequency is
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
\({N_s} = \frac{{120f}}{P}\)
Where,
Ns = Synchronous speed in rpm
f = Supply frequency in Hz
P = number of poles
Calculation:
Given that, speed (NS) = 750 rpm
\(750 = \frac{{120\; \times \;50}}{P}\)
\( \Rightarrow P = \frac{{120\; \times \;50}}{{750}} = 8\)
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