Kapanadze Cousin - DALLY FREE ENERGY

[magpwr]

hi
How can you not much you have to learn I did not know that I would receive an honest answer Thank you.
- glad to hear that you are a person not indifferent and what you have to say is a proven and reliable command
I know now that there is not another pile of crap I bought recently such a small (Water Oil Diesel Fuel Transfer Pump) and it turned out that does not lead to the canister by the flange,
good sell just not practical hmm.
These pcb is as you say, what so cheap is "expensive" I thought that PWM is only one channel (I drove to the theme of kit because he was ready and cheap).
if they manage to find something else?

I read this post again Dog-One.
and I realize how much Work! you put into it, and the knowledge of the constructive Such simple solutions can not exist.
- But there is nothing disapointed I could learn something through

"Speaking from experience, I initially used a SG3524 which gave me full PWM (0 - 50% duty cycle) control and frequency (8 - 40kHz).  Connected to this chip I used a pair of 14 amp IXYS gate drivers and did the switching with a pair of IRFB3077 MOSFETs.  All seemed fine and dandy.  I could control frequency and power level no problem at all.  What I discovered driving the yoke (toroid) transformer with this circuit is that you really need to run the duty cycle pretty close to 50%.  You don't want to be at 50% with no dead time because the core will saturate and begin to draw mega amps.  If you run the duty cycle at say 20%, the wave form on the output side is not even close to a sine wave.  Rather, it's badly distorted.  The catch is when you run near 50% duty cycle you get a good sine wave on the output, but with the grenade and induction heater coils connected, you almost get a runaway condition on current draw.  It's very tricky to find the right value resonant capacitors to tame this current draw down, but if you get them, you'll see a nice sine wave and current draw will sit at about 5 amps powering a 60 watt incandescent bulb."

I will have to learn how to ask questions that do not know the answer it may sound strange. Thx

hi Tomtech29,

You may want to take a look at the BEMF(Between Drain-Source) once you approach close to 50% for one simple reason IRFB3077 Mosfet does have nice Rds on at 0.0033Ohms but supported voltage is mere 75volts max which kill the fun.

But hey i am nobody to teach about Electronics.

[Dog-One]

Yes, that's OK. The winding should be continuous in direction from start to finish with a centre tap.

You can also use bifilar (zip-cord) for ease of winding.  When you do this, the end of one winding connects to the start of the other winding--this is your center tap.  I've used both speaker wire and line cord this way; both work fine for this application.  Attached is an early wind I did before I knew to keep the two secondaries separated and the primary on top.  There is also a bifilar wound fine telephone wire secondary I attempted to use for the high voltage--don't try this though because even a slight load on it will push serious BEMF into your MOSFETs and smoke them.  Use a separate driver circuit and transformer for your high voltage.  T-1000 warned me of this but I had to try and prove it for myself.

[TinselKoala]

I'm sorry.

http://www.youtube.com/watch?v=OadJX-BVUow

[AlienGrey]

It might seam to be a dumb question but what's the last couple of pages got to do with with getting Ruslans device working ? If your going to have a play group could you please start another thread, fanks fellers.

[Dog-One]

I'm sorry.

You should be.  That was a perfectly good alligator clip you destroyed.