synchronous motor

["Tesla list" <tesla@xxxxxxxxxx>]

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

Dr.,
  Thanks for clarifying that. I probably have a motor capacitor that will be
in that range some were. I can't see any kind of centrifuge switch in the
motor, that would sure make things a lot easier for me for sure. I'll check
it out a little closer and see if it does though. I kind of doubt it does
though since it has both windings exposed.

Tony

-----Original Message-----
From: Tesla list [mailto:tesla@xxxxxxxxxx]
Sent: Monday, February 19, 2007 8:49 PM
To: tesla@xxxxxxxxxx
Subject: [PHISH] Re: synchronous motor


Original poster: "resonance" <resonance@xxxxxxxxxxxx>



Tony:

That was 4-12 uF not picoFarads.

This for a small 1/20th to 1/10th HP motor.  For a larger RTTY type
synchro motor the value is usually around 10-12 uF and sometimes
higher.  Values higher than this typically feature a disconnect
centrifugal switch inside the motor housing at the real
tailshaft.  If you operate the motor with more than this amount of
capacitance the high currents could damage the windings or burn the
motor up. Good idea to monitor the currents while you are testing to
be sure it is within the range stamped on the motor's plate.

Dr. Resonance


>Original poster: "Anthony R. Mollner" <penny831@xxxxxxxxxxxxx>
>
>I see now. Thanks Gerry, I hope to do some tests tomorrow. I dug out an old
>momentary push button that's perfect for this now all I need to do is to
get
>a Cap. that will work. I have a few but I think they are to high a value.
>Dr. Res. suggested 4 pf but what I have is in the 7-8 value. I might try
>them anyways and see what happens.
>
>Tony