Re: ATM - Fractional HP Motors for Grinding machines

[lowther@att.net]

Del Stanton wrote:
> 
> IN both an AC Induction Motor and an AC Synchronous Motor
> the motor's field windings and the associated steel
> laminations produce a rotating magnetic field in the space
> that will be occupied by the rotor.  In a two pole motor
> this magnetic field rotates at 3600 revolutions per minute,
> in a four pole motor it rotates at 1800 revolutions per
> second. (Which I shall refer to as the "synchronous speed".)
> 

Guess I should have dragged out the book BEFORE posting.  I really
thought I remebered this correctly.

nr = ns = (120*f)/P

f is frequecy
P is number of poles




-- 
Ken Lowther
Youngstown, Ohio
http://www.atmsite.org