Kapanadze Cousin - DALLY FREE ENERGY

[itsu]

that's good to see... that's the same curve I was trying to show that it's without the nano pulser... (other than your current driver looks really good for driving sharp changes incurrent)
the higher frequency there should be the L(?)... grenade coil frequency.

The higher frequency there is the oscillations/ringing created by the MOSFET's drain when driving the 2x 6 turns primary of the yoke.   
It needs to be dealt with so we have a nice square wave coming from the MOSFET's drain and thus a clean resonance sine wave of 27KHz on the L3 coil.

Only when also inputting the kacher signal and/or the nano-pulse signal we should see any signal ontop of the 27KHz sine wave!

Regards Itsu

[Hoppy]

The higher frequency there is the oscillations/ringing created by the MOSFET's drain when driving the 2x 6 turns primary of the yoke.   
It needs to be dealt with so we have a nice square wave coming from the MOSFET's drain and thus a clean resonance sine wave of 27KHz on the L3 coil.

Only when also inputting the kacher signal and/or the nano-pulse signal we should see any signal ontop of the 27KHz sine wave!

Regards Itsu

Itsu,

What does the waveform look like when the yoke secondary is loaded?

[itsu]

Itsu,

What does the waveform look like when the yoke secondary is loaded?

The yoke secondaries ARE loaded, the 28 turns with a 22K resistor and the 3 turns with L3 in series with a 465nF capacitor.

The L3 signal you have seen above (27KHz sine wave with ringing), the 28 turn secondary at the 22K resistor shows a representation of the 2 MOSFETs square wave like signals with the nasty ringing peaks of max. 550Vpp.

Regards Itsu

[magpwr]

Magpwr,

i still follow the original Ruslan diagram, which used ucc37321 MOSFET drivers, however as i only had the non-inverted ucc37322 i am using those.     
MOSFET's used are IRFP260N's.

I have (or there is) a basic problem to drive the 2x 6 turns primary of the yoke, as it is very hard to tame, you will find out.
As i never have seen any screenshot of Ruslan or Akula of the drains of the MOSFET's, i assume they have the same problem.

Regards Itsu

hi itsu,

May i suggest the igbt's which was listed for you in the circuit diagram by Akula as also found before i even started editing the circuit diagram to fix the bug.
These are the ones-
But i would recommend to select the one eg: FGH50N6S2D
11N60 20N60 or FGH50N6S2D .
Try to search in the internet for DIY induction heating circuit which there are many igbt to choose from.

I never use IRFP260 try to go for those that is 600volt rated and fast response then get 10 of those via ebay it's cheaper if shipment is free.But waiting time is a killer.

Please do sort out your MC34063 boost circuit in the meantime to get around 18volts for the IGBT drivers.

I have just revised my nanopuser to use only 1 i/c:74HC132 to go as low as 20ns...1us (With no ringing noise at the trailing edge.) which is overkill but very stable than 2 i/c version as there are less gates in circuit.
But there is a catch need to use TC4421 or other inverted version to get it up right.

This simplify pcb creation.

It seems varistor is needed as seen in some circuit related to flyback to protect igbt or mosfet.If you take a look at the circuit it is there for a reason.

[Hoppy]

The yoke secondaries ARE loaded, the 28 turns with a 22K resistor and the 3 turns with L3 in series with a 465nF capacitor.

The L3 signal you have seen above (27KHz sine wave with ringing), the 28 turn secondary at the 22K resistor shows a representation of the 2 MOSFETs square wave like signals with the nasty ringing peaks of max. 550Vpp.

Regards Itsu

I was thinking in terms of loading the 28 turns with a FWBR and 30W of lamps as per circuit schematic. I assume that you have nice short gate leads.