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

[robbie47]

@room,

I re-read the patent and noticed that Tesla mentioned that preferably the core wire is isolated, like you mentioned earlier in reply to me, due to Eddy currents. That is why of course transformers have thin isolated plates as a core.
If I am correct you mentioned that the soft iron wire you used for core is not isolated. So would't it be better to isolate you iron core wires, instead of using copper wire as a core?
It's not easy to isolate though....

[Room3327]

@Gyula,
  Yes I tried to load the output, Shorted with my ammeter I get a little over 100 ma.  The voltage decreases very rapidly with load and almost acts like a static charge? It will light a led across the output but I can guarantee that it is not overunity at this point. I have much more power going in then I have coming out.

@robbie47,
    I understand all that, I think what your missing here is I want a core that I can run at a much higher frequency then I can with steel.  Finding, making, or trying to buy a ferrite core of the size and dimensions needed here is virtually impossible.  So as others here have suggested making it out of 'insulated' copper wire may be the best way to go.  I think the copper will respond to much higher frequencies and as stated before magnetic fields will follow copper. I also have the possibility of utilizing this core 'winding' as I have been talking about.

[gotoluc]

trying to buy a ferrite core of the size and dimensions needed here is virtually impossible.

Hi Room3327,

great work you are doing ... thanks for sharing

Here is a large 280mm Ferrite ring: http://cgi.ebay.com/LARGE-FERRITE-RING-280mm-EXTERNAL-CIRCUMFERENCE_W0QQitemZ190204642807QQcmdZViewItemQQptZUK_ConsumerElectronics_SpecialistRadioEquipment_SM?hash=item190204642807&_trksid=p3286.m63.l1177

280 millimeters = 11.023622 inches

Hope this can help.

Luc

[Room3327]

@gotoluc,
     HOLY GOD!  Is that a monster of ferrites, I had no idea they were made this large.  I wonder what it was built for? Thank you for the information.  I very well may end up puchasing one of these.

[Room3327]

@All,
    Here is the clean schematic for the 2 Phase drive circuit, with I believe all changes I've made so far.  There is nothing on the output connections as that is not firmed up yet, that will be an entire circuit by itself.  I should probably mention that I have tried series and parallel resonant modes with the field and it works very nicely in either mode.  Parallel resonant mode minimizes current all the way down to 50 ma. at the freq. (1KHz) I tried it,  but input voltage was also reduced.  Series resonance worked really well boosting my input voltage to 60 Vpp across each phase and input current of 300 ma. this mode is where I had 30 volts output.  Don't forget this has a 10 to 1 transformer ratio so there is no way this voltage should have developed.  It has to be created by the rotating field.  Anyway it is TAX time so I may be a little absent around here for awhile.  For some of you if the dot method of denoting winding starts throws you off I am sorry, I don't have time to draw pictures for you, just know that all of my windings were wound in the same direction.