Tesla Patent 382282, and all related to his transformers/converters

[gyulasun]

...
In his aplication he used soft steel wires as the core for toroid.
Do anybody wonder what is happening,not to the coils wound on this core,but to the steel wires core is maid of.
...

Hi,

My understanding on using (isolated) soft iron wires as the ring shaped core is that in that era it was a simple solution for minimizing eddy currents and form a toroidal shape by the easiest way.  So this core kept magnetic flux inside the ring with acceptable loss levels.  Nowadays a toroidal ferrite core could be used instead, as Room3327 wrote above.

rgds,  Gyula

[TheNOP]

He only had at his disposal mechanical methods of doing this and consequently was still limited to the realitivly slow speed of 10-15 thousand RPM maximum. 120 years later we now have a lot more to work with.

how many contacts can you put on a 12 inchs disk, what about a 36 inchs one ?
he might have been limited in rpm speed, but not in switching capabilities.

and yes.
isolated iron wires is to minimize eddy current.
today, the same can be achive by other means.

but, is eddy currents really something to supress or is it a need part for a tpu to work ?
from what i saw, all the tpu seem to get very hot...

[pix]

"but, is eddy currents really something to supress or is it a need part for a tpu to work ?
from what i saw, all the tpu seem to get very hot..."

Hi,
That is exactly what I am guessing.I know in Tesla days insulated iron wire was the common way to make core.Today we don't use this.Maybe this is also a point to look into.According to SM  TPU gets very hot after 20 min. In my opinion we need to verify both: effect on the coils and effect on the core wires. Still, anybody know what is the effect on electrons when we make magnetic pulse along conductor?

[Room3327]

My question is, Why are you so concerned with the core, If Tesla was using the core for anything other then a regular transformer core it would be in his patent. My advice is to look at this realistically and not try and make it too esoteric.  I don't believe Steve Marks or Tesla were doing anything too out of the ordinary with this device.  A core in an inductor is mostly for boosting the magnetic field from the input given to it.  And yes steel wire made it easy for me to wind the core in the shape and size I needed, in fact I wound the wire core on a paint can to give me the size and shape I wanted.  A larger diameter for the core, like in my design makes it much, much easier to put the winding's on it, again no magic. Eddy currents are going to be there, and yes this may cause heating of the core, this is why insulating the core components makes sense, to minimize the Eddy currents.  Also using mechanical contacts to increase the rotation speed would not work, mechanical contacts have a maximum operating speed that is too low for this application and I don't know how you could increase the frequency of a sine wave by using mechanical contacts in the first place.  I will soon be posting a complete schematic of the circuit for driving this converter I designed, the circuit will fit on a 2 x 3 inch board and be driven by two 9 volt batteries and cost under $20.

[pix]

Hi,
because nobody has checked this out .I agree there is nothing exotic and tesla setup is pretty simple,yet unique.for the moment I can not do experiment for myself,next week I am coming back home and then I will do.It would be very nice if you post your  schematic.
If you have possibility, when running your unit-to check if there is any voltage on that wire your core core is made?This should quickly validate if there is something ongoing on the core wires.
Regards,
pix