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[bistander]

Hello Bi,


It could be a Variac...however, doesn't Variacs require a minimum Input VAC to transfer power to secondary?
Like 120VAC?
And this is due to the number of windings and gauge of wire used at primary...
That I have understood Variacs potentiometer only works at output (secondary)
Or maybe am wrong, as it could take any input below 120VAC...
I could be, as I have never used one...

Regards


Ufopolitics

Ufo,
I'm pretty sure there is no problem at less than rated voltage. Of course, output voltage percentage remains the same, like 0 to 125%, typically. Neat devices. I like them. Here's a few links which appear informative. I notice tutorial videos out there also.

https://eepower.com/technical-articles/variable-transformers-operation-and-applications/

https://www.electronics-tutorials.ws/transformer/auto-transformer.html

https://variac.com

Not expensive and often found surplus/used for cheap. Easier than custom winding a xformer.
bi

[Jimboot]

@Jim,

I have done a similar experiment, I also have an 800-900 Watts Generator Stator...except my Rotor was a motor armature and I was using DC to rotate field with my rotary power switch.
But I also set both generator stator circuit windings in series, because by themselves, each will not do it enough...
However, there is a throw out side, a back lash here, both circuits are different wire gauge, plus lesser turns, plus set at 90° apart...So, your rotor positioning here is crucial...try aiming poles in between those 90° convergence, say at 45°...or near that.
Try "tuning it" by hand, very small angle turns...while checking output.

This means that whenever you load them in series, your drop power would be huge...
It would be great if you could rise your input frequency somehow...but you are tight down to 50 Hz...

Try by setting the stator circuits in parallel...it would be lesser voltage but more amps...see how lamp performs.

Regards

Ufopolitics

having the stators in parallel would be good to check. Thanks ufo. Rest assured I have spent hours slowly turning the rotor mm by mm to find the best spot. As you will see in last nights video. It varies with the cap value used.

[Jimboot]

As inductive loads seem to be seen as a short, you would have to use resistive loads to loop it. You could not daisy chain these for the same reason. So thermal exchanges or peltier devices  I guess. I was able to charge a battery via a fwbr. I also connected a halogen directly to the 24vac supply and checked temp difference when run off the gen. Off the 24vac it was room temp as it was not glowing but was drawing current. Off the gen it was 36 degrees Celsius higher.

[Ufopolitics]

I also connected a halogen directly to the 24vac supply and checked temp difference when run off the gen. Off the 24vac it was room temp as it was not glowing but was drawing current. Off the gen it was 36 degrees Celsius higher.

Hello Jim,

Your simple experiment above proves the gain is real.

I also have seen these anomalies which shows higher output than input.  But as you, I also have my doubts about Amperage readings...I have a great Amp clamp, but since it  works based on magnetism, it could alter results if it gets close to where magnetic field is rotating or alternating (in your case).
I am going to test next with a Current Probe to make sure my clamp is right.

Also, I believe a very radical Voltage drop with a load on (seen on Meters and on Scope Sinewave, shows that the amperage is not as strong and high.

These Generators Stators are wound to work at rotational speeds of the Field above the 3000 RPM's...or above 50 Hz.

Regards


Ufopolitics

[Jimboot]

Hello Jim,

Your simple experiment above proves the gain is real.

I also have seen these anomalies which shows higher output than input.  But as you, I also have my doubts about Amperage readings...I have a great Amp clamp, but since it  works based on magnetism, it could alter results if it gets close to where magnetic field is rotating or alternating (in your case).
I am going to test next with a Current Probe to make sure my clamp is right.

Also, I believe a very radical Voltage drop with a load on (seen on Meters and on Scope Sinewave, shows that the amperage is not as strong and high.

These Generators Stators are wound to work at rotational speeds of the Field above the 3000 RPM's...or above 50 Hz.

Regards


Ufopolitics

interesting thanks mate. For some reason my scope seems to be 3 times higher than the dmm so I have a config issue but the relative difference of voltage seems to match the dmm. https://youtu.be/lIjecj207KU