<< Synchronous
 motors on the other hand run at a fixed RPM depending on the line
 frequency and are found in lathes, drill presses, dryers and
 washing machines. >>

Paul, you will never, well hardly ever, find a synchronous motor used in
these applications.

They are induction motors, running slightly below synchronous speeds.  They
slow down as you load them up.  The more you slow them down, the more current
they draw.  If you slow them down below rated speed (usually 1750, 1150, or
3500), they draw more than rated current and get very hot very quick.

My homemade water pump has a 4 inch impeller and 1 1/8 id in and out.  But I
have got to check it at 6500 RPM before I dare put it on the engine.  BIG
pulley on the driving motor!  I don't know if I have a motor big enough to
drive it at that speed.

Bob Darrah

I told you it was a long time :-) I stand corrected.
Thanks for the right information.
I guess synchronous motors are used in clocks.

Paul Lamar
 
The Aircraft Rotary Engine Newsletter.              Powered by Linux.

http://home.earthlink.net/~rotaryeng/            http://www.linux.org