Ghazanfar Ali Generator - Utlilizing trapped energy

[EMdevices]

This is my simulation with a capacitor, and of course we note the voltage drops as the energy is drained from it, just as expected.   

(I was even conservative and only added 0.5 ohms of resistance to the inductor, if I have zero ohms resistance, the discharge rate is obviously slower.)

If Ali claims his capacitor does not drain in his actual built circuit, then it is likely the 5 volt square wave pumps the circuit through the capacitance in the MOSFET.   In that case, the power is realy coming from the 5 volt square wave switching signal.    But I have doubts on this, because the obvious source of power is the main capacitor, and he is only showing a simulation of a few miliseconds.

EM

[poynt99]

It is still a mystery as to how his MS simulation lasts for so long. In mine the oscillation starts falling off after about 20ms. I used NO coil resistance.

So you are about where I am now. Someone early in this discussion mentioned that "it did not work in LT Spice", and I get the feeling it does not work in PSpice either. That's why Ali has not posted working files for either.

He does claim that he has a working unit on his bench. However, we've not yet seen evidence of this claim.

.99

[EMdevices]

This is what I mean by driving the load from the 5 volt switching waveform, see simulation.   

This is as simple as it gets!   

It works becouse the MOSFET has internal capacitance between its terminals.  To somebody who is not familiar with electronics at this level, they might think this is over unity, but it's not.   The energy dissipated by the resistor comes from the 5 volt switching waveform, and even though the GATE is insulated, and no DC power flows,  AC power flows quite nicely through the MOSFET capacitance.


Now,  I'm wondering if ALI has the circuit tuned just right so the 5 volt waveform pumps the tank circuit and keeps the charge on the main capacitor.    In that case, he needs to scrutinize in more detail the power consumption of the 5 volt supply.

EM

[Magluvin]

Hey Em

In your schematic above(shown below  edit. actually the next post) I dont see the diode on the mosfet.  I played with this circuit in Circuit sim, using the analog switch in place of the fet and the added diode gave much better oscillation. Dont know if that means much.  ;]

Mags

[Magluvin]

Sorry.  Your pic from above


Mags