Magnetic field of a bifilar pancake coil

[Bob Smith]

The difference:
the dielectric plane is in between the two coil layers. right between the north magnetic field component, and the south magnetic field component.
And it is much easier to roll.

That is amazing!
It seems to open up new possibilities for research into harnessing charge from the dielectric plane and using it for measurable work.
Bob

[evostars]

That is amazing!
It seems to open up new possibilities for research into harnessing charge from the dielectric plane and using it for measurable work.
Bob

stacking the coils also is very interesting.
If you stack 3 biPHIlar coils then you also have 3 dielectric planes. As if there are capacitor plates.

if you pulse the top coil, with current, the middle coil will resonate with the first coil. But also the bottom coil will resonate. but... does the bottom coil, "see" the top coil?

in other words, if I connect a load to the bottom coil, does it reflect back to the top coil?

Other questions also rise. Since there are these dielectric fields, can we speak about dielectric induction?

As always, I have resonance in mind. In my last youtube video, I talked about a different non magnetic resonance. Its my intention to show this resonance, and the absence of the magnetic field.
And the possibilities this creates. the influence it has. and the interactions.

Im still designing a proper circuit to show this, based on back emf pulsing the resonant coil.

[Allen Burgess]

Skycllection's inductance bifilar stacks.

stacking the coils also is very interesting.
If you stack 3 biPHIlar coils then you also have 3 dielectric planes. As if there are capacitor plates.

if you pulse the top coil, with current, the middle coil will resonate with the first coil. But also the bottom coil will resonate. but... does the bottom coil, "see" the top coil?

in other words, if I connect a load to the bottom coil, does it reflect back to the top coil?

Other questions also rise. Since there are these dielectric fields, can we speak about dielectric induction?

As always, I have resonance in mind. In my last youtube video, I talked about a different non magnetic resonance. Its my intention to show this resonance, and the absence of the magnetic field.
And the possibilities this creates. the influence it has. and the interactions.

Im still designing a proper circuit to show this, based on back emf pulsing the resonant coil.

@evostars,

Skycollection's stacked bifilar's are not connected and pass power through inductance. Skycollection measured the output of a Hexafilar through a resistor under guidance from Conradelectro.

The results showed that voltage drops across the load coils from top to bottom while amperage remains unchanged. This is the opposite from an electrical connection where voltage remains constant and amperage drops across the load.

The practical advantage to this kind of transmission system is that the power plant can instantly tailor output to the load across the grid simple by increasing the voltage instead of generating amperage. The grid can't generate amperage instantly so it needs to run it's generators at maximum output all the time. This results in pumping water uphill with the excess power to store it and have the potential to divert to the grid when it's needed.

Tesla generated power by coal furnace at "Wardencliff", to charge a large bank of storage batteries. When power was drawn by a receiver station, Tesla could instantly transform his stored D.C. power to higher voltage to match the load. The inductance transfer of power relationship between the broadcast antenna and reciever in Tesla's wireless system is identical to the bifilar coil's stacked in close adjacency; The power transfer is still wireless! The measured voltage along the "Inductance Grid" remains constant. The voltage increases only to match the load, while the mainline voltage always remains unchanged.

[evostars]

need help designing circuit

I found out I can pulse a bifilar pancake coil with back emf, and it produces resonance, without a magnetic field. I played around with this, and I have seen a drastic reduction in power consumption.

I have a pretty good idea of what to do, but the electronics is hard for me.

It comes down to this:
- 2 stacked bifilar coils, A and B.
- coil A is pulsed with high current. It produces a strong back EMF that is captured via a fast diode, into a capacitor C.

Coil B is resonant, by the pulses of coil A.
Coil B is tuned down, by adding a parallel capacitor D.

Capacitor C and D are equal size.

So far its easy. now comes the tricky part:
the back emf is at the end of each pulse, and I want to discharge capacitor C into the resonant coil, at the start of each pulse.
This discharge, should be sharp and fast. just like a back emf spike.

this results in a doubling of the resonant voltage in coil B. but not only that. There happens more. But so far I haven't been able to create the circuit for this.

I think the trick is, to have a mosfet, pulsed by a back emf spike, so it quickly discharges the capacitor into the resonant coil B (it wont discharge completely, but it will give the coil a kick).

The capacitor C is charged, with negative voltage.

By discharging it at the start of the pulse of Coil A, into coil B,
It lines up with the resonant sine wave voltage of coil B being 0 volt. This means both resonances line up. (polarity can be reversed, by grounding the other side of the resonant coil).

I also have a third coil, that also resonates. I have rectified it into a large capacitor bank, and brought a 15W 230V light bulb to light up. from 16V pulses. But this was without the right timing of the back emf.
I can tell a lot more about this setup if any one is interested, but this post is already to long.

I really hope someone can help me out.
please

[evostars]

I already have tried pulsing the back emf straight into the coil, and it does have some effect.
this is because the coil is a low impedance path for the back emf, so the voltage never gets really high.

But the voltage of the back emf is much higher (more energetic) if i first store it into a capacitor.
A capacitor, presets a high impedance load, once its charged up. This makes the back emf much higher in voltage.

by feeding the back emf into the capacitor, the capacitor gets a high voltage spike, and charges up very fast (i intend to use 10nF 1000V poly).
then the charged cap, is very shortly connected via the mosfet to the resonating coil.
The coil is connected to ground. So the cap discharges some of its voltage into the coil, giving it a big kick, since the voltage in the capacitor is several hundred volts negative, and the coil is at zero volts.

Then the back emf charges the capacitor back up, as it already was almost full.

[evostars]

I made a LTspice simulation. and it seems to be doing what I want.
see attachment, and run in ltspice.
One note, in the simulation the L4 coil, isn't resonating, this is due to the capacitance and inductance values.
in real life I use a biPHIlar coils

The circuit is not perfect, So if anybody has some suggestions...
please do! there must be easier petter ways, to create 2 out of phase pulses, at 50% duty cycle.

This is based on a ne555n pulse generator.
it generates pulses at the resonant frequency of a coil. (in real life around 160khz)

a second 555 is used as an inverter.

[evostars]

there is one hickup with this design.
when the coil becomes resonant, it produces a voltage sine wave of positive and negative values.

since the coil is connected to the source of the mosfet, the relative voltage between the source and gate, changes.

the voltage swing thus changes the mosfet on/off state.
this is bad. it kills the resonance.
zvs switching comes to mind.
maybe its not a problem but can it be a solution?

my first thought is to connect the source to the gate via a resistor, so the voltage at the gate stays the same.
I tried this before but then the back emf spike that should switch the mosfet doesnt work any more.

pfff....

anyone got ideas?

[evostars]

maybe a blocking diode between the resonant coil an the mosfet source, as only a half cycle (positive) is causing the mosfet to switch. the negative voltage from the capacitor can always pass the diode.
if im correct...
lets animate this

[evostars]

self oscillating bifilar coil, Hartley circuit

Im still looking for the right oscillator.
I found this Hartley based oscillator, that can be used to bring a bifilar coil into its resonant frequency. Read the descriptions in the picture.
It is self tuning.

the graph is made with a 10n (giving 111kHz) capacitor (the other capacitors should also be 10n except for the 2200 at the voltage supply.

I haven't tested this circuit in real life, but I'm confident it will work.

other npn transistors also work. power is is around 240mA(sine) at 12V (around 1,9W) producing a 110 peak to peak resonant sine (plus and minus 55 V).

The L3 coil also resonates. This is actually not the pupose. I want one coil pulsed with a square wave, so it produces back emf.

[Diplomacy]

The L3 coil also resonates. This is actually not the pupose. I want one coil pulsed with a square wave, so it produces back emf.

Have you tried a reed switch?

Make a bifilar coil with a strong magnetic field, have it engaged by a reed switch, put a small magnet up to the reed switch such that the coil field cancels the field engaging the reed switch upon forming, gives a nice sharp square wave.

I put a 3kv dipped ceramic cap across the reed switch to cut down on arcing and even then it doesn't last forever, but reed switches are $.50 and cheaper to burn up than transistors.

Have this coupled to the coil you want to send back EMF into, as long as the magnetic coil is engaging at higher frequency than the resonance of the BEMF coil it should be fine unless I understand incorrectly.

[evostars]

thank for your input Diplomacy
but i need to switch at 160khz. a reed switch will never go that fast.
and the idea is to have both processes in sync.
the pulse in the first coil lets the second coil resonate.
the pulse in the first coil also produces back emf (negative voltage) that can be stored in a capacitor.

when the next pulse starts, the back emf stored in the capacitor is pulsed into the second (resonant) coil.

this pulse from the cap into the second coil should be like a back emf spike. fast and intense, and most importantly very short in duration.

if the coils would be separated, not magnetic coupled, the spike from the cap would also bring the coil into resonance, but this time, without a magnetic field component (!) this has been confirmed twice independently.

I would like to build a proper setup to show this.

[evostars]

microvolt:
the current is not running sequentially in opposite directions
tbe current is running sequentially in equal directions, as per Tesla's patent 51234

[evostars]

easy to make bifilar pancake coil + update

I made a video explaining how to easily make a bifilar coil from speaker wire, and how the fields are situated:

https://youtu.be/ZKP9Bgpqa5E

update:
I have designed a circuit in LTspice, that is supposed to do what I want.
I'm now designing the board. Very exited about this.
If it works, I will share more, but it might need some tweaking.
(Bifilar pancake coil Resonance, without a magnetic field).

[evostars]

Ready for testing and tweaking.

[evostars]

If you want to pulse it with back emf, you could try a zenner between the inteded bmf pulsed coil and ground. eg a 15 volt zenner blocks 12 volt pulses, but allows back emf to pass.

Im curious with solenoid coils Im pretty sure that one end will be north and the other south, but does that mean with pancake coils if the middle is north the outside will be south?

A Zener, thats a great idea. but will it charge up a capacitor with the back emf voltage after the zener? It passes current, but the voltage stays low. I need it high on the other side of the zener so I can charge it up.

About the magnetic field of a bifilar pancake coil, I made a video showing the field:
https://youtu.be/uhY27Zoor-Q

The north and south pole are centered in the middle (hole) of the pancake. When you look from one side of the coil its south, the other side its north. but in fact the compass needle points at the same place. The field wraps around the coil like a donut. the dielectic field is in between the windings, in the center of the magnetic field.