[time-nuts] OXCO Spurious Output at Line Frequencies

Tue Jul 12 23:08:14 EDT 2016

Just to clarify - AC motors are either synchronous or induction.
Induction motors must slip away from line frequency to develop the
magnetic field they need to carry a load. The name plate speed is for
rated load and the number of magnetic poles in the rotor. A 2 pole motor
spins near line frequency - 4 poles at half. 1750 is for a 4 pole motor.
And so on ... 

Bill Hawkins 

-----Original Message-----
From: Hal Murray
Sent: Tuesday, July 12, 2016 7:24 PM

Most of the medium sized motors run at slightly below line rate, and
often at half of line rate.  I'm thinking of the classic squirrel cage
induction motor vs a synchronous motor.  A quick google search found
1725 and 1750 RPM.