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AC / DC
#1
Fragments of this have been posted in other topics, but I want to organize this data with a separate thread as I continue this line of amateur research..

We series connect AC and DC sources with the same amplitude and we achieve a single polarity sinewave.  This is akin to the Figuera single wave...

   

Now we must get the 2nd single polarity wave 180 degrees out of phase..  Turns out this is pretty simple..  Simply place the 2nd load between the opposite 2 posts...

   

This gives us the full Figuera waves..

Now my questions..  I am finding it difficult to measure the total input of both sources because the current from both sources is circling in 1 loop.  And I have many other questions I may need to answer for myself with experimentation.

It seems we have 1 side of the circuit pushing while the other is pulling.   I find the possibilities fascinating.  And I plan to find ways to measure it all and test some different configurations..
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#2
First thing I need to do is get this circuit properly running off 1 source supply so I can accurately measure total input.  I posted a method before using a single transformer. Although it looked good open circuit, the output changed when loaded.  So I will try this design .

   

A single AC source will parallel to 2 transformers.  1 transformer will be rectified and smoothed to DC, and the other transformer will be the isolated AC.   This shouldn't take me long, so I will update once I try this design..

My prediction is the power dissipated through the resistors will be roughly HALF of the power the input is supplying.  But I may be totally wrong..  We will see
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#3
So I built the circuit..  

The circuit works perfect with an AC source and a battery,  but because they are 2 separate sources it is difficult to measure things..  Getting the AC and DC on 1 circuit becomes a little more complicated..

So this circuit "ALMOST" works as planned..

   

The problem is the diodes in the FWBR cause some voltage drop.  So the DC voltage is lower than the AC, which makes the output wave dip into the opposite polarity.  

And what I came to realize, the AC capacitor is absolutely necessary..  The capacitor becomes the battery, which allows current in both ways, where as the rectifier does not.  The DC circuit is basically keeping the capacitor charged to the right level..

So instead I tried 2 alternative circuits to measure input..  Both configurations almost matched efficiency..

Circuit #1-  150 watts in,  50 watts to each resistor
Circuit #2-  18 watts in,  6 watts to each resistor

The measurements were a little lower from usual losses,  but I think it's pretty safe to assume we lose roughly 1/3rd or 33% of the input power.  

The math is actually pretty easy..  The circuit only has 1 way current, so an inline DC meter should be accurate.  And each source has the same voltage..  So if we are using 12V,  it is 12v multiplied by current, then that number multiplied by 2.  And the output discharged through resistors should be roughly 1.5 Times the wattage of 1 supply..  Or 66% of the total input..  

So now to organize this and see about inducing...
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#4
Still working on getting perfect Figuera waves, Fully Adjustable levels, using impedance, all off 1 DC source.

Here is what I came up with..  

   

This should give me 2 perfectly smooth Single polarity Figuera waves that are 180 degrees out of phase, and the same polarity. The variac allows me to adjust the AC amplitude to match the battery.

The only thing it is missing is frequency control, which I could later replace the variac with an AC amplifier.  But might not be needed, as 60Hz I hope will be fine.

It may seem like a bunch of unneeded parts, but this should fit the bill, because I need to bias the AC with DC all from 1 DC source.

I am not too concerned with inefficiency or waste.  Because if I can manage to get rotational induction action correctly, efficiency becomes almost meaningless..  

I will update with results tomorrow or saturday
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#5
So the inverter / battery / Variac method did not work as planned..  A single AC leg will not flow current to the battery ground.  Even though a single wire from a stereo amplifier CAN send current to the battery ground..  There must be differences with the isolation between the two.

Now before I continue, I need to think about conversion of the rotation via induction.  Without that, I can't do real tests..  What I am thinking is to use a legitimate gas generator stator and rotor..

   

These suckers are professionally designed to induce from rotation in an optimal manner.  They already have the 2 needed coils on the rotor and the stator winding aligned to work with it..  

I have some old generators, so I plan to attempt to take these parts out of it and try different circuits and configurations to rotate the field of the rotor..

I will update IF I get the parts out and post all the values I see..  Let's see if I can get these parts out (I heard getting the rotor off is a PITA)
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#6
Ok not too bad..  The rotor and stator came out with moderate work..  

These were pulled from a Honda 2500 Watt generator that I got for free.

   
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#7
Separating the coils and wiring it up was pretty easy..  Now I have 2 individual rotor coils that each measure 9.2 Ω each.

   

What we know is  "IF" the rotor was physically rotating, this generator self-excites with the jumpstart of residual magnetism in the rotor core, and the output is enough to keep the rotor coil excited + output 2,500 Watts..  

So now I have a decent setup to play with virtual rotation..  The goal now is to figure out how to make the magnetic field of the rotor induce like it was in rotation..
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#8
Starting with very basics,  just to get some baseline numbers..

First, applying standard 60Hz AC, so it acts like a transformer...  Notice the rotor position.  The top of the core has an air gap.  The rotor coils are positioned on either side of the gap..

   

In this position,  I see roughly 8.2 watts input,  and 5 watts output to an 8 Ω resistor..  When I close the top core gap with a piece of metal, the open circuit voltage decreases.  

Next,  I rotate the rotor 90 degrees so a coil bridges the gap..

   

Absolutely No Voltage output.  

Looking at the generator's manual, we can see the stator core connects to itself within the output coil,  and the air gap is only on 1 side.  Apparently to keep the flux running through the coil, because if the core connected at the top, some of the flux would take an alternative path avoiding the coil,  hence the lower output when I bridge the gap.

   

All in all,  cool little setup....  I am excited to tinker around..  I will continue simple ideas first to get the feel of it.  Then go from there
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#9
I have all sorts of Mind-Bending things happening with this setup..  Although the below video does not show this,  the circuit runs perfectly fine with no ground wire from the audio drivers to the battery.  I will show that soon..

The circuit is essentially closed, as 2 battery's hot lead powers everything.  But it seems the circuit see's 2 isolated circuits which we are able to series connect it to the same single battery source.  And we can run the drivers with no ground.  It must be getting it's ground from the opposite phase.

Here is the video.  It is quite complex, and take my commentary with a grain of salt. 

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