Re: Microwave Oven Sync. Motors!

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

Original poster: "Jim Mitchell" <Electrontube-at-sbcglobal-dot-net> 



One more thing... I assume they use synchronous motors because they will 
turn the other direction if stopped.  That way the turn table would spin 
the other way if it got obstructed.  Another thing I found synchronous 
motors in are those plastic "Disco Balls" that you see from time to time in 
novelty stores.

Regards - Jim Mitchell
----- Original Message -----
From: <mailto:Electrontube-at-sbcglobal-dot-net>Jim Mitchell
To: <mailto:tesla-at-pupman-dot-com>Tesla list
Sent: Friday, April 16, 2004 8:57 PM
Subject: Microwave Oven Sync. Motors!

Hello List,

This may have been discussesd before but...

I was taking apart a brand new "Galanz" brand 700w microwave (payed 40$ for 
it ;-))  And I was removing the turn table motor when I noticed it said 
SYNCHRONOUS MOTOR on it.  So I plugged it in,  and it spun slowly, like 5 
RPM.  I popped the case open and removed the gear assembly... I then turned 
the motor on again.  This time It was spinning faster ~400 RPM?  It was 
also in sync with the line as the stick I had put on the rotor was standing 
still in 5 different places.  The motor just had a coil surrounding a rotor 
made of what seemed to be a magnet.  I doubt this would have a lot of power 
but may work for a small propeller gap.  Sadly mine stopped working after I 
got metal shavings stuck to the rotor and it froze up.

Regards - Jim Mitchell