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3 Coil Virtual Rotation Build
#1
Ok so I thought of a new way to create virtual rotation and verified the system is indeed creating smooth proper rotation.  This new way is a little different than my past attempts and I think it exactly mimics what a generator does.   It is NOT acting like a transformer at all.  I know because there is one coil aligned dead center with the pickup coil like a transformer, and when the AC input sinewave of that center coil is at peak, the output is at Zero.  And when that primary center coil is at Zero, the output is at Peak.  The input does not raise at all when taking a load.

Furthermore, I also figured out why using 2 phases 90 degrees apart almost always caused the input to raise while harvesting a load.  And I know how to fix that.

The issue I am having is that since I am using AC in coils to create rotation, and since the CEMF is not affecting the coils, they are self-inducing and creating back-EMF which is limiting the input current as I increase frequency.  So the output DOES increase with frequency UNTIL the Back-EMF reaches a certain level and starts impeding the input current. Then the input and output both reduce as frequency increases.

So I need a way to reduce Back-EMF or Self-Induction of the primary inductors, and I think Figuera and Buforn figured this out. Figuera did not specifically show it in his drawing, but Buforn did.

If there is interest, I can explain how I think the virtual rotation MUST be created. But we must go step by step to understand WHY a generator does not suffer from CEMF and can output much more than is needed to sustain the magnetic field of the rotor.  And how we can mimic it without physical rotation.

Addition-  Keep in mind, a rotating generator DOES cause Lenz Drag on the physical rotation, but does NOT raise the rotor coil input requirements. Since virtual rotation does not physically move, the aim is to make a stationary motionless generator that does not raise the input of the primary (like a generator) as we harvest a load and it has no physical movement to cause drag.
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#2
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#3
Start with this

   

Ok, so as you saw in the last video (and in the title) , I am using 3 coils, NOT 2 and NOT 4 as I previously thought.

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#4
So I will explain the phases I will be using a little later.  For now, here are the 3 primaries I will first test with.

   

Each one is a Bifilar, each layer of the bifilar is 12 ohms.  So each coil has a total of 24 ohms wound around the cores.

There is something else I am doing here that can not be seen.  It's an attempt to mitigate the self induced Back-EMF.  Again I will explain a bit later after verification takes place.

Pure AC Sinewaves will be used in a manner that mimics what the last video shows when the rotor is spinning.  

The Pickup Coil bobbins are printing now. Hopefully tomorrow I will have them wound and ready to test
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#5
Interesting.... two coils to emulate 'peak', one to emulate 'zero' (alternating?) ... bifilar as a back-channel to harvest from?

What frequency are you starting with? I can output AC from my pulse motor into something like this.
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#6
This is similar to your work , have you looked at any of Kishnu Prumakaram work entitled. " Design modeling of a bitorid transformer" ? It shows your findings and talks about material for construction. It's all interesting. Good luck with your work.
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#7
(05-15-2024, 12:26 AM)unimmortal Wrote: Interesting.... two coils to emulate 'peak', one to emulate 'zero' (alternating?) ... bifilar as a back-channel to harvest from?

What frequency are you starting with? I can output AC from my pulse motor into something like this.

Good morning. So the original 2 coil rotation idea DID create rotation but it was missing the next vital pole coming in, which balances the CEMF as well as helps output. On a generator, 2 separate poles (coils) influence the pickup coil at the same time in opposite polarities. This was a missing piece the 2 coil arrangement did not solve. 

Using a generator to make these phases is possible, but the design is very difficult.  99.9% of generators can't make them properly.  To verify if your generator can do it, there is a simple test with a scope.  If you have the scope yet, I can help you determine if the waves are suitable.

As a hint- I am using a function generator with 2 stereo amplifiers, but only utilizing 3 of the 4 total channels.

As far as the bifilar coils, no I do not plan on collecting energy with them.  The output coils will wrap around all 3 primary core stubs to receive the rotation. I am using the bifilars because I already have them made.


(05-15-2024, 06:06 AM)Uniongarage Wrote: This is similar to your work , have you looked at any of Kishnu Prumakaram work entitled.  " Design modeling of a bitorid transformer" ? It shows your findings and talks about material for construction. It's all interesting. Good luck with your work.

Don't know,  just googled and searched youtube with no luck. Can you post a link?
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#8
Pickup coil bobbins are done printing..

   

   

I will wrap the top and bottom heavily with 21 gauge wire by hand.  They will be the pickup coils.  The 3 inside coils will be fed with AC at exact phases to create the virtual rotation.

Both sides of the primary coils will be used.  Picture an Axial Flux Generator with 2 stator layers. 

Now to prepare to wind!
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#9
Now there is 1 aspect not shown yet.  First, notice every one of Buforn's patents that show the cores.  What do you notice?

   

The cores Do NOT extend all the way through the primary coils.  They are concentrated at the poles.  There is no connected magnetic path through the coil.

It is my belief, this was done to LIMIT the amount of Self-induced Back-EMF the primaries will produce.  I spoke of this earlier in this thread, my preliminary tests showed that the input did not rise while taking a load, BUT as I increased frequency, the input drew less current.  I do not want that.  The less current going in, the lower the output. 

So inside my 3 primaries, I have a 10mm spacer in the middle.

   

Think of a generator with a coil in rotation.  Only DC is going into that coil, so there is no Back-EMF. That coil becomes a permanent magnet.  We Do NOT want the magnetic strength of the rotor to lower as we increase frequency.  

The hope is that by leaving a gap in the middle prevents some of the Back-EMF that the primaries will generate.
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#10
https://drive.google.com/file/d/1GmKh8sT...p=drivesdk
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