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Join Date: May 2009
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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

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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
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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

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#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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Guru
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#4

Re: Derivation of N=120f/P

12/14/2016 3:26 AM

Dear Mr.dhanesh koshti,

Pl. refer Electrical Technology book, the AUTHOR is H.C.COTTON

You will find the details in the chapter for Synchronous Generator (and or) Synchronous motor.

The philosophy involved is - how many times the pole crosses a particular set of coil per second.

DHAYANANDHAN.S

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Guru
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#5
In reply to #4

Re: Derivation of N=120f/P

12/14/2016 5:06 AM

Imagine that.

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