Re: Sync Rotary gap motor

• To: tesla-at-pupman-dot-com
• Subject: Re: Sync Rotary gap motor
• From: FutureT-at-aol-dot-com (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
• Date: Thu, 24 Feb 2000 08:28:51 -0700
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

Mark,

Any kind of induction motor without armature windings can be 
modified by grinding flats to make it sync.  It doesn't matter if it
split phase or cap start, or cap run.  A 1725rpm motor gets 4 flats,
a 3600 rpm motor gets 2 flatls.  The armature (really a squirell cage
rotor), has imbedded copper or aluminum bars which behave as
windings, but they don't look like windings (there are no visible
windings).  There are some induction motors (probably very old
or special types) that have normal windings in the armature, and
have brushes, but these are rarely seen.

Cheers,
John Freau
--

In a message dated 00-02-24 05:53:00 EST, you write:

<< 
> Seems people are having more questions about this the past couple days.
 
> I know that a cap-start, induction run motor can be made into a sync motor
> by grinding flats into the armature.  A friend of mine (who LOVES HV
> things) gave me an old Dayton motor from his old furnace blower.  It's a
> 1/3 HP 1725RPM *split phase* motor.  Can a split phase motor be turned into
> a sync motor by grinding flats in the armature?  I'd rather not take the
> time to do so, esp since I still have no way to test it yet, and I wouldn't
> want to take a chance that I'd ruin it in case he wants to use it later.
 
> Thanks
 
> Mark >>

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