Negative discharge effect

[ayeaye]

I will, i had no idea that there is any kind of diode inside.

[Kator01]

Hello,

you are pumping gate-charges via the Miller-Capacitance into the Drain-terminal , pumping it via the inductance to capacitor ( LC-tank)
if pulse is shut off, negative puls is created ( collapse-spike ). After a while you will damage your electrolythic capacitor.


http://electronics.stackexchange.com/questions/83712/gate-capacitance-and-miller-capacitance-on-the-mosfet

also see Vladimir Utkin-paper how to gather negative charge. Here starting on page 58, but be sure only to use
metal-foil-capacitors

http://www.free-energy-info.co.uk/VladimirUtkin.pdf

Regards

Kator01

[ayeaye]

I see.

But why the effect appeared on different frequency when i repeated the experiment? While everything remained the same, the mosfet, the coil, the diodes, the capacitors. What changed, the mosfet, the coil's core, or the capacitors?

[Dave45]

Here starting on page 58

Yes the buck converter generates neg energy.
A pos pulsed coil has a neg bemf.

[Kator01]

@ayeaye:a capacacitor is frequency-sensitive. Different frequency means different reactance, different reactance means different amount of charge transfered per period via Miller-Capacitance.
See here: http://www.sengpielaudio.com/calculator-XLC.htm
Capacitive reactance X_C = 1 / (2 · π · f · C)
It´s not worth to persue IMHO, exept what Utkin proposes. I have to say however that I could not replicate his results with the negative charged capacitor. Energy in form of negative voltage was always less than existed before in the cap as positive voltage.



Kator01