Joule Thief

[Mk1]

@goat

the 2 joules thief are at 180, but the toroid is divided into 90 degrees (2x90 degrees for one jt) when one is up the other one is low , each are part of the same ac wave so you need 180 to get the full wave of the ac .

I hope this makes sense .

Mark

[Goat]

@ Mk1

Thanks I see what you are saying but it's a little bit hard trying to visualize Tesla's patent using your circuit as you posted it.

My query here is can you make the toroid coil act as Tesla intended using the same wire setup he had but using the JT or other circuit to drive it so that you get a rotating magnetic field like in a motor to then translate that into the transformer end of it.

Thanks,
Paul

[Pirate88179]

@ Gadgetmall and all:

My 48 volt fans are not here yet!!!  Included in this shipment are also 3 neons so I can finally fire up my Bedini replication.  Anyway, my question is this:  I know a dc motor will function as a generator without any modification.  What I am wondering about is will a brushless fan also work as a generator without mods?  I was outside smoking and it is very windy here tonight and I was thinking that if it would, I could make a small wind generator out of a 48 volt brushless fan (I ordered 5 of them) and, using a joule thief, I can light some leds when the wind is blowing.  These fans are obviously built differently than a regular dc motor but, does anyone know if they produce any dc when turning on their own by the wind?

Thanks.

Bill

[electricme]

@Goat,
I have looked at the Tesla 381970 patient, it sure does look like a JT torid setup, but it is a dual energy system.

The key to figuring this out is the "generator" at the bottom of the patient.
The "generator" is NOT a generator as we currently think of a generator, rather, this is a sync pulse unit, or a frequency generator, with low output only, it has just enough output to drive the Tesla Donut, thats is it's sole purpose.
If you examine the picture, the primary coils are the only electrical devices connected to the output, therefore it dosn't require a big amount of energy or power to "excite" the primary coils, which look as though they are wound with much thinner wires.

It works similar to a exciter which is placed on very old generators, their purpose was to provide a small output to start the main generator.
These older generators just would not work without the "excitors"


All this by the way is without reading the patient itself, just looking at the drawing gives me a awful lot of info, I will download and read this patient later on.



OK, the generator I think is being used as the "exciter" or energy maker for the torid, the torid is the actual generator itself with "no moving parts". I would expect the torid would be a single iron bar, it "may" have an "air gap"

The main shaft has 2 sets of 2 slip rings, they could be mistaken as 3 phase or a "star" connections with a 4th slip ring for earth or as in a alternator the "NS" connection, but, these "may be" and I think I am right, are 2 seperate circuits which alternate the output energy to the 2 seperate primary windings which are 90 degrees from the other circuit.

The first circuit, which is fed  by the first set of slip rings, feeds energy to 2 sets of primary coils 180 degrees from each other.
The other set of slip rings feeds another set of windings setup as the first set, but at 90 degrees to the first set.

When the exciter shaft is at every 180 degrees of rotation, the torid field collapses, producing a high energy captured by the larger torid coils, so there is 2 pulses revolution.
hmmm ....................not sure ,


(SHADES OF THE MARK 1 and 2 COILS)

MK1 heres your chance, make a MK4 coil, just like this but powered by 2 seperate JT, but have the JT outputs at 180 degreese to each other but in sync with each other, there are, General Jim suggestered it on the 27th of February 2009, ha ha ha.

Prophesy (The Joule Thief is going to go BIG) I'm talking about going into big 1 meter diameter hoops or torids or even bigger.
3 phase, 4 phase, 6 phase, 8 phases 16 phases, 32 phases, 64 phases phewwwwww.
The JT seems to work with Iron as well as ferite, a big steel former should not matter.


Lets get back to the matter at hand.
There are TWO seperate outputs, both energising seperate loads, these windings are designated by the heavier wires, which seem to me to have lesser turns than the primaries.


So what is Tesla trying to do with this item?
I think he stumbled (or thought) how to capture the eather energy" by using a small excitor setup instead of building a huge engine and generator without all the size and weight that comes with a nigraha falls unit.

I saw a couple of chaps on U Tube who had a really huge coil setup that could put out a fair amount of power, this thing seemed to run by itself, examining the images, the coils  seemed to have been wound on a steel vertical round former, almost like they had cut a 6 inch in width of a 2 foot diameter steel pipe, and wound the coils around the steel pipe section.
This thing almost filled the width of a coffee table. hmmmmmmm bigtime.

Mabe they had a capacitor start to pulse it up, it wouldn't take too much to replicate this, might get a steel pipe offcut in town and have a bit of a play with this thing, very interresting this one.

Ist's LED light generators crank handle to recharge his nicads could start it up.
I got plenty of copper wire, from microwave transformers, yearrrrrrrssss, I got to make this.

General Jim

[Mk1]

@electricme

I did do that like the tesla pat.  8 coil , 2xjt coil , 4 pickups coils , an i read the patent , its a step up and step down transformer
depending on the way the coil are connected. And got me at the mk series toroids. i posted the circuit back in December.
To me the exciter is a switching system could be replace by transistor , i could not get them in sync now i can. The picture on last page is the result. The colored coils are the jt coils and the other are plain mag wire. Since i could not sync them a made the mk1, from one jt. Btw the exciter has it own patent. Not many people know that.


Mark