RE: [TCML] How To Turn A Vacuum Cleaner Motor Into A Synchronous Motor

["Phil Tuck" <phil@xxxxxxxxxxx>]

The poster mentions that he had "the mains on the other" [ channel]  So I assume a mains reference sine wave on the other channel.

Regards
Phil

www.hvtesla.com

-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf Of dave pierson
Sent: 07 December 2010 09:51
To: Tesla Coil Mailing List
Subject: Re: [TCML] How To Turn A Vacuum Cleaner Motor Into A Synchronous Motor

In usual engineering use of the term synchronous motor, the speed is set by the line frequency.  Strobe Testing with a magnet spun by the same motor as a sync source demonstrates that one end of the motor (where the magnet is) is 'synchronous' with the other end.

If a scope is to hand: most have a 'line sync' position, which syncs the scope to the _line_ freq.  With line sync selected, a reading from the flying magnet to a sense coil would be interesting.

A motor which (happens?) to be running at 3000 (ish) will appear synchronous to 50 (or 60, or 30 or 100).  A proper synchronous motor will hold synch Under Varying Load. 

best
 dwp
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