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Join Date: May 2009
Location: Mumbai
Posts: 69

Derivation of N=120f/P

04/07/2011 12:31 PM

Speed of Induction motor is given by, N= 120f/p

I am searching the derivation of this formula.if anybody have an idea pl. help.

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Guru
Engineering Fields - Power Engineering - New Member

Join Date: May 2007
Location: NYC metropolitan area.
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#1

Re: Derivation of N=120f/P

04/07/2011 1:29 PM

Nobody can help you derive that formula for an induction motor since it is the formula for a synchronous motor. Try Googling, if that fails look in any textbook on electrical machine theory.

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Guru
Technical Fields - Technical Writing - New Member Engineering Fields - Piping Design Engineering - New Member

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Location: Ketchikan, AK, USA
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#2

Re: Derivation of N=120f/P

04/07/2011 8:14 PM

This formula is much too easy to require a "derivation." It's just a matter of counting poles as they go by, one per each half of a sine wave.

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Guru

Join Date: Oct 2009
Posts: 2015
Good Answers: 163
#3

Re: Derivation of N=120f/P

04/08/2011 10:04 AM

Please refer to any good text book on AC Machines.

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