Kapanadze Cousin - DALLY FREE ENERGY

[Farmhand]

Oh I see SeaMonkey, you mean to use the feedback circuit but with the driver chips to drive the gates, good idea. That mazzili or Royer circuit or whatever it is always looked like it would make a lot of warm and use extra power, due to the resistors and zeners. I get your drift now. That feedback circuit would be a very good setup if it could be kept to minimum power dissipation. Feedback is good. Mostly. 

Cheers

[Farmhand]

they aren't required... the zener part of this is hardly touched if the voltage divider is tuned for your voltage.
There are 2 significant losses; 1) across the voltage divider, but if using 24V, and 2 10k resistors (20k) is only 1mA or so.
2) the dump to ground when the mosfet is open, and the other side is closed; building a high voltage.  This can be minimized with a diode on the ground to the mosfets.

Otherwise, most power is transferred if you have a load.

Mazzilli Sim ...

Sounds good, I would like to try that I think. It would be very useful.

The sim tells me the bottom mosfet is being driven but no current is going to the gate. Or am I doing it wrong ?
..

[d3x0r]

Sounds good, I would like to try that I think. It would be very useful.

The sim tells me the bottom mosfet is being driven but no current is going to the gate. Or am I doing it wrong ?
..

Takes a few seconds to get to a stable state.


Thee is no current going through mosfet gates; they are tiny capacitors.... 


http://www.youtube.com/watch?v=a3H-lrMB0PY  (some guy explaining mosfets)


Transistors require current flow, mosfets require voltage (pressure)

[Farmhand]

Current is required to charge that capacitance. Isn't it ?

I know the gate is a capacitance, I use them all the time. I understand how a mosfet works the regular way, but I'm unaware if they can be used in alternate ways.


Cheers

P.S. I said "to" not "through". Just to be sure, I never stated that "current flowed through the gate". Although being a capacitor displacement current is at play. Is it not ?

..

[TinselKoala]

Btw the 2n3055 circuit, can run on 24 to 36 volts, and gives up to 600 watt energy on 36Vdc.

Is it _still_ necessary to point out that "Watts" are not a measure of energy, and mere multiplication of peak power means essentially nothing?

Energy is conserved. Peak power can be multiplied as much as you like, but you still aren't showing any greater energy coming out than going in.


An exceedingly simple way to provide complementary drive signals to two mosfets from a single oscillator is to use a trifilar phase transformer with three windings of equal turn count. The oscillator drives one winding, and the two other windings are each connected to the mosfet gates and sources, but with opposite phase orientations. So with each half-cycle of the oscillator, one mosfet gets a positive pulse to its gate, turning it on, and the other gets a negative pulse, turning it off. On the next half-cycle, the opposite happens. This is the technique I used in my TinselKoil 2.0 to drive the main H-Bridge which switches the power to the coil's main primary.