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Overunity Machines Forum



Selfrunning Free Energy devices up to 5 KW from Tariel Kapanadze

Started by Pirate88179, June 27, 2009, 04:41:28 AM

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0 Members and 179 Guests are viewing this topic.

Jeg

Quote from: magpwr on June 10, 2014, 07:44:05 PM
eg:IGBT should not have total on off delay as found in spreadsheet  should not be greater than 300ns Total delay.


MAgpwr
The switching frequency of an IGBT or Mosfet, as you correctly stated can not be more than few MHz. But, if you find the right switching spot then the coil starts to oscillates at rates up to hundreds of MHz. It is something different than the switching capability of the mosfet. The mosfet closes but the oscillation keeps going. I have tuned a self Armstrong oscillator with an IRFP460, which switches at about 3MHz, but the coil is ringing at 50MHz at almost 200V clear sinus!

MenofFather, wesley, dr3x0r

In relation with L3 (coax cable shorted at the end), i remembered a video that i have seen before some months of Don Smith. He was saying (and as it looks he was right), that when we have a bifilar coil shorted at one end like L3 coax, then voltage cancels itself out so only current develops in the coil! He had stated that this could be a very nice primary for Don Smith replications. If you stay here a little bit, this is important because if L3 at Dally's circuit is ringing at this High MHz rates, then what we have is a second primary (other than L1) with current peaks at this high rate which superimpose on the lower frequency from L1. Think about it

MenofFather

Quote from: magpwr on June 10, 2014, 07:44:05 PM
Hi,

I seriously don't know what you guys are talking about.
For example if i have a pwm generator running at around 225khz at
around 20% duty cycle.The component needed eg:IGBT should not have total on off delay as found in spreadsheet  should not be greater than 300ns Total delay.

I don't see why it is hard to obtain fast response components.

pwm circuit with mosfet can be constructed at around $10 dollar.
Any lower amount better off sticking with joule thief circuit.
You must put into transitor about 150 nanosecond pulse. And this parameter is always is same, only ajusted frenquency in ns generator. Hard find fast transitors who be NPN, 150 or more volts and 60 megaherc and 10-15 amperes. And also hard make 150 ns pulses to gate of transitor.
TL494 generator flip flop is not hard part and it frenquency seems about 1-4.5 kiloherc. Nanosecond pulses generator frenquency, I almost shore is about 100-600 kiloherc.
:)  Good lock!

magpwr

Quote from: Jeg on June 11, 2014, 06:35:27 AM
MAgpwr
The switching frequency of an IGBT or Mosfet, as you correctly stated can not be more than few MHz. But, if you find the right switching spot then the coil starts to oscillates at rates up to hundreds of MHz. It is something different than the switching capability of the mosfet. The mosfet closes but the oscillation keeps going. I have tuned a self Armstrong oscillator with an IRFP460, which switches at about 3MHz, but the coil is ringing at 50MHz at almost 200V clear sinus!

MenofFather, wesley, dr3x0r

In relation with L3 (coax cable shorted at the end), i remembered a video that i have seen before some months of Don Smith. He was saying (and as it looks he was right), that when we have a bifilar coil shorted at one end like L3 coax, then voltage cancels itself out so only current develops in the coil! He had stated that this could be a very nice primary for Don Smith replications. If you stay here a little bit, this is important because if L3 at Dally's circuit is ringing at this High MHz rates, then what we have is a second primary (other than L1) with current peaks at this high rate which superimpose on the lower frequency from L1. Think about it

hi Jeg,

This is my findings during experiment with don smith coil for example primary coil(5 turns) is running around 200khz (I did not obtained the CREE IGBT then) using 60volts boosted supply.
If my secondary coil one side 15uH is connected to capacitor(hv) and base on LC resonance(use online calculator) which is tuned at 1/4 frequency of around 200khz.The rectified output is around 21volts only.
(This will cause interference with fm radio nearby in mhz range although input is in khz)
The most important point i would like to highlight shorting the output at 1/4 resonant frequency did not increase current drawn at primary coil supply no greater than 100mA.


Since it's below <100volts using igbt drain connected in series with 5 turns coil.(This is typical inductive  as also found in my induction heater).

--------------------

Latest update for today i just received TLP705(105 ns version) and FOD3180(200ns) to be used as optically isolated igbt driver for  1000<1600 volts supply from 4 x 450volts capacitors in series.
Upcoming plan a large toroid will be used to power all the 6 opto igbt drivers via one of 6 "few turns around toroid" then output of each coil is rectified then connect to 7820 or 7824 voltage regulator.


Testing with FOD3180 at 230KHZ at 20% duty produced 4volts drop at output.The test supply used is around 19.5volts boosted using MC34063 connectd to 12volts.
Reducing duty cycle to 10% instead of 20% at FOD3180 input got me around 18.5volts around 1 volt drop at output.
The good news using datasheet revealed the absolute maximum rating for FOD3180 is actually 24volts.

Final testing on TLP705 scheduled tomorrow will revealed to me which one of the 2 opto driver i will be using.






 

 

zcsaba77

Hi for all

In Daly's device is mentioned PC ATX, its work like step-down transformer, is critical elements? and in Akulas device (if I good remmember/see) in his device was bifilar (forth-back winded) in first transformer, and after was connected tesla transformer!? the principle is same? And one Akula's device was trifilar coil (forth-back-forth winded) on this coil is 1. reflection shited from original peak 1/3 wave and 2. reflection same from 1. reflection, if work like that?
Can someone explain d. bridge nesseserity beetween output coil and cap. banks and why unipolar cap was used after d. bridge? short high peaks can goes trough d. bridge opposite direction?

regards zcsaba