Re: Microwave Oven Sync. Motors!

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

Original poster: Terry Fritz <teslalist-at-twfpowerelectronics-dot-com>

Hi Gerry,

In "your" case, you just borrow one of mine ;-))

But a brand new 1/4 HP motor at 1800 RPM generally goes for $75 if you shop 
around.  About $25 on Ebay... In your case, conversion to sync is free ;-)) 
Plain Jane 1/4 HP motors are super common and exist everywhere.  Even Sears 
sells them...

Cheers,

         Terry


At 08:41 PM 4/17/2004, you wrote:
>Hi Terry,
>
>Where does one find a salient pole 1/10 to 1/4 HP 1800RPM synchronous motor
>and what would one expect to pay for it.
>
>Thanks
>Gerry R
>
> > Original poster: Terry Fritz <teslalist-at-twfpowerelectronics-dot-com>
> >
> > Hi Jim,
> >
> > Many small AC gear motors (like clocks use) are synchronous.  Digikey
>sells
> > these raw motors too.  The problem is they are too slow with the gear
>works
> > and too low of power to do much with.  Since they are very low power
> > impedance protected things, they don't have to worry about overheating or
> > efficiency which is terrible in them from a percentage point of view.  We
> > need to be able to turn big rotors fast so we need bigger motors.  I think
> > John Freau say we need at least 1/10HP.  1/4HP 1800 RPM is perfect IMHO.
> >
> > Cheers,
> >
> >          Terry
> >