Re: 3 Wire Motor -- Help

["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 10/16/02 10:36:04 AM Eastern Daylight Time, tesla-at-pupman-dot-com
writes:


>
> First off, I've ripped it apart and it does not
> appear to have any 'flat' spots on the rotor, nor
> are there any 'dead' spots in the stator. 
>
> There are four wires, one of which is a definite
> ground since it's screwed into the casing. The other
> three are red, blue and yellow. 
>
> The resistance between the red and blue is 286 ohms,
> the resistance between the red and yellow is 212 ohms,
> and the resistance between the yellow and blue is 74
> ohms. The motor's engraved data says it's 1800 RPM,
> 115VAC, .45A 



Jeremy,

It's probably a cap run motor, and may need the cap
placed between the red and yellow wires.  The yellow and
blue connect to the AC power.  Or it could be cap start,
and need the relay, etc.  Many possibilities.  It may
also be a hysteresis sync motor, but if so, they are 
usually labeled that way.  A HYST motor will always
start in a different position, so you'll have to re-phase
the system everytime you use it.  DC Cox did mention
a special type of HYST motor that only starts in
2 different positions.

If the motor has a brand name or other info, those may 
provide clues.

John