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. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.