Kapanadze Cousin - DALLY FREE ENERGY

[itsu]

I am confused.
Are your primary windings connected as illustrated in Diag.A or Diag.B ?
Note: Their circumferential advancement direction is not depicted in these diagrams...

Which way is the current driven when the MOSFET turns ON ?  Is it in the direction of the yellow arrows, that I drew on the screenshot from your video ?

You do have autotransformer action between the two primary halves.  This is to be expected, because one half induces voltage in the other half.  The jist is: what is the polarity of this induced voltage?

Also, what are your probe positions?

I tripple checked, the primaries are wound in the same direction with a middle tap like mentioned by Dog-one too.
This is as it suppose to be to my knowledge.

So that makes it like illustration Diag.A.

The current flow as depicted in the picture is then, as i figure it out,   one side (left) like the yellow arrows, but the other side (right) the opposite (the opposite arrows i mean are for the windings only, not the wire ends)

The probes where across the drain / source (for the yellow and the purple traces).

Itsu

[Dog-One]

When using B diagram the primaries should clockwise+counter clockwise to ensue oppsosite winding directions leading to center tap. The magnetic field polarity depends on the direction of winding and it is needed to have it flipping.

If one uses a true center tap, then winding direction must be the same start to finish.  If you wind one primary in one direction and the other primary in the opposite direction, you cannot connect together the two coils where they meet.  This would be a bucking coil configuration that simply will not work with a push-pull driver.  All it will do is take turns pushing the magnetic core into saturation since the flux direction will always be the same instead of oscillating back-n-forth.

Just look at the voltages and apply The Right Hand Rule.  One MOSFET needs to push the flux in one direction and the other MOSFET pulls it back in the opposite direction.

[Dog-One]

I tripple checked, the primaries are wound in the same direction with a middle tap like mentioned by Dog-one too.
This is as it suppose to be to my knowledge.

So that makes it like illustration Diag.A.

The current flow as depicted in the picture is then, as i figure it out,   one side (left) like the yellow arrows, but the other side (right) the opposite (the opposite arrows i mean are for the windings only, not the wire ends)

The probes where across the drain / source (for the yellow and the purple traces).

Sorry for the confusions.

It can happen to any of us Itsu.  Glad you confirmed all is well.

I figured if you were able to light a bulb without pouring massive amps into the driver board, you probably had it correct.



Something you may want to try is adding a few turns on each primary, just one or two at a time.  I'm using a nanocrystaline core and found that 14 to 15 turns works real well; much better than 12.

[itsu]

It can happen to any of us Itsu.  Glad you confirmed all is well.

I figured if you were able to light a bulb without pouring massive amps into the driver board, you probably had it correct.



Something you may want to try is adding a few turns on each primary, just one or two at a time.  I'm using a nanocrystaline core and found that 14 to 15 turns works real well; much better than 12.

Hmmm, not sure what you mean, even though my setup looks ok, i still have the problems with the drains triggered by something else then their gates (looks like they are triggered by the other MOSFET shutoff pulse).

Itsu

[Hoppy]

Hmmm, not sure what you mean, even though my setup looks ok, i still have the problems with the gates triggered by something else then their gates (looks like they are triggered by the other MOSFET shutoff pulse).

Itsu

Itsu,

Can you run your TL494 control circuitry from a seperate supply with a common star ground, as this may help? This is especially important if you have any linear voltage regulators feeding your control circuitry. The spikes on my supply rail were severely affecting the operation of my PWM and sometimes destroying the voltage regulators.

Regards
Hoppy