Confirming the Delayed Lenz Effect

[wings]

1 Vladimir
2-3 Zasarinin - kanarev - Gary - Gotoluc experiments with opposite coil and magnet .... - Joule Thief?


and a test on similar configuration

http://www.youtube.com/watch?feature=player_detailpage&v=vya6E5M_jt8


the coil has to be tuned as Vladimir said symmetrical condition with resonance in the coil

[Magluvin]

In the Energy Amplification thread, I posted a theory on what Romero was doing with his coils that took him soo long to tune, as he stated.

He used 7 strand litz. He stated that we needed to increase the capacitance of the coil. I at the time had made the suggestion that he had wound them bifilar. And he confirmed it.

But even then, the coils were like 300 turns. From my experience, he would have needed many more turns and much more capacitance that that in order to get the coils to ring at the freq of the rotors magnets were applying.

So I had thought that maybe he split the litz into 2 individual bundles of strands, where one bundle is one winding and the other bundle is the other. But it always bothered me that there were an uneven number of strands. This would make one of the windings 1 strand thicker than the other, 4 and 3 of 7.


If we split the strands into 2 separate windings(of a bifi) we get 2 times the number of turns. 600  Magsy likes.  And if we select different strands to test for comparative capacitance, there will be differences depending on if the 2 strands are in close proximity within the litz form.

So that would be a time consuming 'tune' session. Getting all the strand ends coordinated so that every other one was combined to one winding, and so on and so forth. A pic below of the cross section of the litz. The blue are 1 winding and the red are the other. This will increase the capacitance even further than just using 2 complete strands of litz next to each other.  So now we have increased the number of turns, and possible inductance, along with much more capacitance, more than double at least.  Magsy really like. 

But the other day I realized another possibility....

The 7th strand.  Considering Romero was doing many experiments with coil shorting just before the Muller vids, I would put my money on the 7th strand being shorted within the litz.  Thats the one in the middle in the pic below.

Along with making a standard and bifi coil for comparison, I am going to make a litz cable with 7 strands of fine wire and see what happens.

It will be interesting to see if the multi strand splitting theory has any merit.

Mags

[Farmhand]

I tested a multi layer solenoid  bifilar coil last night, it has I think three or five layers of about 46 strands per layer 23 of each winding per layer side by side.

I used a 10 k resistor on one leg of the function generator and scoped the windings.

Both windings measure 251 uH each, together in series the top of one winding connected to the bottom the other and I get exactly four times the inductance of
each winding alone at 1004 uH. When connected in cancelling configuration the inductance is zero. The resistance of each winding is 1 ohm and both in series is 2 Ohms.
One winding is only half the wire of two windings in series we must remember that. I also had a sniffer coil of about 10 turns around the coil.

The one thing I noticed that was a little bit odd to me was that the resonant frequency of one winding alone is the same as the resonant frequency of both in series.
Which is kinda counter intuitive and indicates a big reduction in capacitance rather than an increase because with four times the inductance and the same capacitance
the resonant frequency should have reduced, with even more capacitance the resonant frequency should be reduced even further.

The resonant frequency was a mere 265 kHz. Which would indicate a self capacitance of 1440 pF for one winding alone and a self capacitance of only 360 pF for both coils in series.

The only explanation I can think of is that with the other winding in place it affected the actual capacitance of one of the single windings quite a bit.

The only way to test is to make two separate coils , one with a certain wire length wound like normal and one with the same amount of total wire length but wound as a bifilar coil.

The tuning to max voltage is very broad, which could be useful in some cases. When a square wave excitation is used after the resonant point the wave shape becomes square again with big spikes.

Of course the voltage produced by a single 251 uH winding was a bit less than half the voltage produced by the two windings in series almost half. However the
sniffer coil voltage only increased to 700 mV from 640 mV when two windings are used as compared to one.

The layers of the coil are separated by wax paper.

Cheers

[hoptoad]

snip...
Both windings measure 251 uH each, together in series the top of one winding connected to the bottom the other and I get exactly four times the inductance of each winding alone at 1004 uH. When connected in cancelling configuration the inductance is zero. The resistance of each winding is 1 ohm and both in series is 2 Ohms.
snip..

That helps to explain why bifilars seem to work better than ordinary coils regarding AUL. With a higher inductance for a given number of total turns, comes a higher inductive reactance at any given frequency, compared to a single wound coil.

It follows that the inductive reactance to resistance ratio would then be higher in a bifilar, and current phase shifts in the bifilar coil will occur more readily at any given frequency, compared to a single wound coil of the same number of total turns.

Cheers

[Farmhand]

That helps to explain why bifilars seem to work better than ordinary coils regarding AUL. With a higher inductance for a given number of total turns, comes a higher inductive reactance at any given frequency, compared to a single wound coil.

It follows that the inductive reactance to resistance ratio would then be higher in a bifilar, and current phase shifts in the bifilar coil will occur more readily at any given frequency, compared to a single wound coil of the same number of total turns.

Cheers

Yes that makes perfect sense. Also the frequency seems to be very low for the coil size/inductance, so the self capacitance compared to a single coil of similar inductance
must be much more even at 360 pF. And theoretically as the supply voltage increases if the capacitance does increase with it then the resonant frequency should drop further.

That was for a multi layered solenoid with an iron powder core. Which is covered by Tesla's Patent "COIL FOR ELECTRO MAGNETS".

I happen to have a very similar coil but with only one winding with very nearly the same inductance 264 uH, i'll determine it's self capacitance and see what gives, gotta find it first.

Cheers

P.S. In case no one noticed my accelerating under load generator coil had a long core and "C" shaped, the core ends were the length of the coil or more away from
the ends of the coil. Which might have helped the effect in my case due to magnetization delay. As per Tesla's other patent. If I had wound those cores with bifilar coils
I might not have needed the capacitor. 

Motor with delayed magnetization patent.
http://www.google.com/patents?id=uwhBAAAAEBAJ&pg=PA1&source=gbs_selected_pages&cad=1#v=onepage&q&f=false

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