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Toroidal Coils

Solid States Devices > Tesla Technologgy

Toroidal Coils

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d3x0r:

(sorry if this somehow ends up duplicated)

I have been playing with these toroidal coils; specifically in a ratio of 1:1 for turns around vs through the toroidal form.


I want to record some notes; and maybe get some input on how to further use these to manipulate the focused fields.... I need another signal generator at least... for each vortex that gets opened, I want to keep open instead of having it(them) close...


There isn't a specific term for these coils; ABHA (Abha?) maybe; they are not pancake, and they are not solenoid.  Although both of these other forms of coils perform a similar function and have similar results, they do not have the same results.


Each turn is exactly the same length as every other turn from the center to a certain diameter of the outer substance.... on every layer.  Every turn has it's focus point centered in the middle of the toroid. 


The center void is the most active area of induction; although detectable inductions can happen through each loop.  Each loop is also tightly closed with itself.  Every loop passes through every other loop, enforcing that in any direction the flux will definatly cross the other side.


They make an excellent 1:1 transformer even though it has an air core.


*Terms for the 2 diameters that can be refered to in common language need to exist*




the number of turns through the center determine the frequency; for similar geometrys, 12 turns has a resonant frequency of 10Mhz, 24 turns has a resonant frequency at 5Mhz (approximately, by a large percentage of probable error).  If the coil has turns the size of a nickel or is 2 dollar bills across, they experience a similar resonant frequency.

d3x0r:
Some other winds I did.....


I have one other that's higher density; and much lower frequency...

d3x0r:
this generates solid 10:1 resonant output for a sine wave input at about 85Khz... it's about 40-50m of wire wound in 4 layers.


One descending CCW  5m
One descending CW    7.5m
One descending CCW  10m

One descending CW    15m


As the diameter of the outside substance increases, the amount of windings it can hold increases.  Winding it back and forth likes this makes a very stable structure.


This doesn't work like a joule thief winding; not in joule theif mode anyway, it can be wired in a similar condition, but using more of a blocking oscillator... you can make a transistor oscillate by just making a slow charge on the gate that is cleared when it conducts... without having the saturation take place.  A higher power joule theif will run current until saturation of the core and a spontaneous dump provides the most output force.


If this coil is wound on a feous toroid, it doesn't matter, and really seems irrelavent; so although there is a composite field which should be thorugh the toroid, the real composite is through the toroid.


I have a video that very badly (doesn't show at all) shows that the field from the toroid is directional;  The dectection coil has to be also resonant with the coil being detected; if it is not, even though the coil is active, the indicator shows no result.


I had my first contracted coil ( loose wound with a tie in the center....)...


I had this chained to a bunch of the others of similar turn count, and ended up with a higher resant output; but each toroid had its own field ... and it was focused so the detector center vertical axis had to aligh with the center of the other toroid vertical axis to be best effect.   The field on the loose toroid was detexted vertical to the center, a small diamter from the center.... so the real bubble was within the point of the toroid.... 

d3x0r:
Okay, and one more thing, the SEG (searl effect gen) requires a spiral pattern be imprinted on the magnets; that's paritally the drive the winding of the large bore toroid.  Although a field is definatly in the center, if the red was grounded or isolated, (existing only for spacing) a high current could be fed through the green and imprint a progressive, diagonal n/s field.  ... so then is there 12:1 turns around the stator? or is it also 1:1, and therefore a different gradient.  BUt there could then appear individual poles going around the top. 


This is a test winding using red plastic weed cutter...


The tension on the line to be straight  (the line wants to be straight not curved) causes it to press against the inner side of the cardboard tube used as a former.

d3x0r:

Did I mention that the best effect is found when driving the coil in an open ended fashion?







Here's a list of videos...


by the way; this coil is very flexible in the direction to collapse the central point tighter.  the more pressure is applied in the center outward


Showing the construction of the large coil.

It started from a flat winding, and it's a single rotation to expand it.... although depending on the axis of the turn it does expand in different directions.... the resulting pumpkin, tight center shape is uhmm... like a 45 degree axis rotation... from ehere the eends come out 180 degrees from each other...

Video showing the large coil.... expanded some from contractionand it's a single rotation to expand it.... although depending on the axis of the turn it does expand in different directions.... the resulting pumpkin, tight center shape is uhmm... like a 45 degree axis rotation... from ehere the eends come out 180 degrees from each other...


attempting to use a toroid to induce into a solenoid...   Didnt' have much luck...  I dunno maybe I'll try it differently.  I have a suspicison that this will be a better than pancake to induce into a tesla coil.... but I've not gotten a successful tesla coil with output... (other than basic straight induction from the high voltage pulse); maybe it's because I beleive things like the prior statement...




How do I incrase the power output to a dead open circuit?  Is this an antenna?  Should I connect it... I dunno ground it is bad, the opposite end of the coil from the signal generator experiences a high voltage output;  Near resonance, the voltage expressed at the input is decreased;  The phase at resonance also shifts... like the optimal power phase the input and output signals are not 180 or 90 degrees out of phase, but are much less; but increasing the frequency past resonance, then the input signal increases voltage.  Now There have been a few points and harmonics I have hit because of the capacitance of the scope, and consolidating and removing the probes changed the frequency. 


Earlier I was experimenting with these coils, but was driving them in a close loop fashion. .... And I did find certain effects, turns out the resnant frequency was feeding back to the transistor and unbalancing it so it would self oscillate, without grounding the gate (almost directly, using a test lead as a resistor)... it kept getting into a runaway condition; I ended up driving the coil as an inverter and getting from 27V and 2.2Amps to powering a flouresent light and 100V LED load quite brighly... but then that's like 35W.  But, the coil is 1:1 winding ratio.

   This is that...      using my TL494 Driver from Dally project...  This was optimally a short duty cycle, not the shortest, but not the longest either.... but there was a wide range... and it was best to find the best power point with a short duty cucle, and then incrase the duty cycle to have a larger current flow; But this didn't really have resonant points... this was just a particular frequency... but probably it's because ti's a square wave which is stimulating a lot of octives at once.





Like; if I have a transformer that's some 12:1 ratio, and connect the pulse generator to the 1 side, and this coil on the output, I won't get anything.  if I connect the other end of the transformer secondary to ground, and have these on the open output side, is that the same sort of pulse?  Is there a way I can make a more isolated pulse ? 

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