Re: Remote phase adj of sync rotary gaps, tests.

["Tesla list" <tesla@pupman.com>]

Original poster: "by way of Terry Fritz <twftesla@uswest.net>" <FutureT@aol.com>

In a message dated 12/9/00 4:19:16 PM Eastern Standard Time, tesla@pupman.com 
writes:

Rick,

Thanks,  BTW, I finished drilling the rotor and installing 2 spinning
copper electrodes today, and the motor still locks up fine.  The
phase controller also works properly.  Yes, I wouldn't be surprised
if the circuit is resonating.  I did try a resistor in series with the
cap, but it made the motor lose lock with full variac setting.  I used
3.5 ohms, and didn't try any other value.  I didn't even listen to see
if the groaning was gone since it didn't stay locked.  Maybe some
other value would be better, but it's seems OK without it.  I guess I should
check the voltage so make sure there are no higher voltage being
created due to the resonances.  I may do some more work with
the resistors, etc.  It's really nice to have this sort of remote
phase adjustment without struggling with mechanical methods.
I still have to build the base and fixed electrode assemblies, etc.

That's an interesting idea about controlling the TC power with the
60Hz tank circuit, I'll let you know if I try anything.

John Freau
--

> Original poster: "rwall" <rwall@ix.netcom.com> 
>  
>  John,
>  
>  Excellent thoughts and work.
>  
>  Along those lines, I have considered a 60 Hz  resonant tank circuit in the
>  low voltage side of a noncurrent limited HV transformer.  Control is by
>  varying the inductance or capacitance of the tank circuit.  I have not done
>  the experiment.
>  
>  I'm not sure, but I think your inductor (variac) and capacitor may also be
>  forming a tank circuit and resonant harmonics are causing the growling in
>  the variac.  You may consider adding  a low value resistor from the main to
>  one side of the capacitor.
>  
>  Maybe you could apply your new circuit to your PT  to evaluate current
>  (power) control.
>  
>  RWW
>