Synchronous Speed
The "synchronous speed" of a synchronous motor is the rate of rotation in RPM of the stator magnetic field. After startup it is also the rotation rate of the motor:
where is the frequency of the AC supply current in Hz and is the number of magnetic poles per phase. For example, small 3-phase synchronous motors usually have 6 poles organized as 3 opposing pairs at angles of 120°, each pair powered by one phase, so p = 2 per phase. Thus for 60 Hz supply current the synchronous speed is 3600 RPM. (N.B. 'p' can also refer to pole pairs, in which case the equation becomes: Speed of rotation = 60 x f / p).
Read more about this topic: Synchronous Motor
Famous quotes containing the word speed:
“Among the laws controlling human societies there is one more precise and clearer, it seems to me, than all the others. If men are to remain civilized or to become civilized, the art of association must develop and improve among them at the same speed as equality of conditions spreads.”
—Alexis de Tocqueville (1805–1859)