Re: synchronous motor

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <FutureT-at-aol-dot-com>

In a message dated 8/6/01 9:15:46 AM Eastern Daylight Time, tesla-at-pupman-dot-com 
writes:

> I tested it by putting a white cardboard disc with a black band 
>  on it and watching it under a single fluorescent bulb, and the motor is 
>  obviously out of sync. I read much of the previous discussion about the 
>  problems with converting a motor to sync. It doesn't seem like any of the 
>  possible problems discussed before would be a factor here. It only has two 
>  input wires, and is not a capacitor start type. It doesn't grind, the only 
>  thing that I've noticed is that the motor runs slightly warm. All I can 
> think 
>  is that the flats are not wide enough. My armature diameter is about 3 
1/4" 
>  and the flats are 71/100 of an inch wide. If anyone can help me out here, 
it 
> 
>  would be appreciated. 
>                                  Justin

Justin,

Those flats should be definitely wide enough the way it is.
It should lock up.  The slight warmness is normal.  Are you
saying you see the pattern rotating then?  Is that how you
are determining that it's not locked up?  Some folks have
trouble seeing the pattern at first.   It can help to run the
motor on a variac, and as you turn up the voltage, you'll
see the pattern change, and hopefully lock at a certain
voltage.

John Freau