RE: Summing up of Async Vs. Sync

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

Original poster: "Garry Freemyer by way of Terry Fritz <twftesla-at-qwest-dot-net>" <garry-at-ndfc-dot-com>

Hmm, does this mean that the flat's aren't that critical, that I could use a
hand grinder to make flats as long as I don't take off so little that it
doesn't grip, or take off too much so that the motor can't rotate the disk
without losing sync?

I never even considered a Sync gap because I figured it would take a machine
shop to do it right and right now, the car is eating hundreds of dollars out
of my bank, but I can afford to get an ole $20 used motor and grind it
myself with a dremel.

-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Friday, June 22, 2001 10:22 AM
To: tesla-at-pupman-dot-com
Subject: Re: Summing up of Async Vs. Sync


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

In a message dated 6/22/01 10:01:08 AM Eastern Daylight Time,
tesla-at-pupman-dot-com writes:

>
>  How does grinding flats on the shaft or rotor thing make it sync?
>
>  Seriously out of tune,
>  Matt Shayka

Matt,

Without flats, the rotating magnetic field cannot "grip" a
particular point on the armature, so the armature slips
constantly.  This slipping permits the motor to draw more
power and produce more power as the load is increased.
When flats are ground, the magnetic field grips the
un-ground area, so it locks to the field and doesn't slip
anymore.  However, this arrangement limits the motor's
torque.  If the motor is burdened with heavy a load, the
motor will lose lock (lose sync), until the load is reduced,
and the motor can lock up again.

John