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Re: Remote phase adj of sync rotary gaps, tests.
Original poster: "by way of Terry Fritz <twftesla-at-uswest-dot-net>" <FutureT-at-aol-dot-com>
In a message dated 12/9/00 4:19:16 PM Eastern Standard Time, tesla-at-pupman-dot-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-at-ix-dot-netcom-dot-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
>