RE: [PHISH] Re: [PHISH] RE: synchronous motor

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Anthony R. Mollner" <penny831@xxxxxxxxxxxxx>

That's exactly what I needed! I'm surprised that the cap. on the start
winding is in series, I would have thought the cap was across the windings.

-----Original Message-----
From: Tesla list [mailto:tesla@xxxxxxxxxx]
Sent: Thursday, February 15, 2007 8:16 PM
To: tesla@xxxxxxxxxx
Subject: [PHISH] Re: [PHISH] RE: synchronous motor


Original poster: "Gerry  Reynolds" <gerryreynolds@xxxxxxxxxxxxx>

Hi Tony,

The main winding is hooked to line_hot and line_neutral.  The start
winding has three components in series (order probably not important)
and goes like this:

line_hot connected to cap.
other side of cap connected to cut out switch
other side of switch connected to start coil
other side of coil connected to line_neutral

If the rotation is in the wront direction, you can swap the two
connections of the start coil.

Gerry R.

>Original poster: "Anthony R. Mollner" <penny831@xxxxxxxxxxxxx>
>
>Thanks for the advice. I checked the wiring and one set is indeed a heavier
>gage than the other. One set is clearly 16 gage and I can read the sire
size
>off the insulation. The other set is smaller but I can't read what gage it
>is. Perhaps 18 gage. I'm not clear as to how the capacitor and starter
>winding are to be wired. Can some one walk me threw hooking it up to run
>synchronous and for start up?
>
>Tony
>
>-----Original Message-----
>From: Tesla list [mailto:tesla@xxxxxxxxxx]
>Sent: Wednesday, February 14, 2007 10:28 PM
>To: tesla@xxxxxxxxxx
>Subject: [PHISH] RE: synchronous motor
>
>
>Original poster: "Anthony R. Mollner" <penny831@xxxxxxxxxxxxx>
>
>Hi to the both of you,
>    Your comments are invaluable to me. You make me wonder if I can utilize
>either winding? May I ask the question about wiring them? It sounds to me
>like the run, start and starter capacitor needs to all be switched on at
the
>moment that it's turned on and than the start and winding and capacitor are
>than disconnected, leaving the running winding on. Is that the how it needs
>to be connected? I have a fully built propeller gap with a blower and
>everything, ready to be fired up now, except for the final motor wiring!
>Thanks for the help!
>
>Tony
>
>-----Original Message-----
>From: Tesla list [mailto:tesla@xxxxxxxxxx]
>Sent: Saturday, February 10, 2007 8:29 PM
>To: tesla@xxxxxxxxxx
>Subject: Re: synchronous motor
>
>
>Original poster: FutureT@xxxxxxx
>
>In a message dated 2/10/07 7:33:26 PM Eastern Standard Time,
>tesla@xxxxxxxxxx writes:
>
>  >Hi Anthony,
>  >
>  >You might try to measure the resistance of the two winding.  If both
>  >windings are the same guage and the same resistance, it might not
>  >matter which one you use for the start winding.  Leaving them on all
>  >the time may harm the start capacitor.  I dont think they would fight
>  >each other since one has a different phase from the other (due to the
>  >capacitor) and syncing is not an issue unless you modify the motor
>  >for sync operation.  If you experiment with the windings, you may
>  >want to fire up the motor for a very short time, power down, and see
>  >if the windings are getting warm.  Repeat this for progressively
>  >longer times until you are satisfied the motor is running
>  >properly.  If you suspect it is not right, you may want to swap the
>  >two windings and try again.
>  >
>  >Gerry R.
>
>
>Gerry, Anthony,
>
>If Anthony's motor is like the one I tried, I found that the motor
>never synched if the start winding remained connected.  It was
>a 1/10 or 1/12 HP motor.  It had the special current-switch for
>disconnecting the start winding as the motor came up to speed.
>If I remember correctly, I was able to determine which was the
>main winding by measuring its resistance as you suggested.
>I think this motor used an 85uF start cap, or something similar.
>
>John
>
>