Kapanadze Cousin - DALLY FREE ENERGY

[MenofFather]

MenofFather,

my nano-pulser is able to pulse at a pulse repetition frequency of 1Khz  to 15Khz, producing 12 nanosecond wide (so not 1-2) pulses of 800 to 1500V depending on the impedance of the pulsed circuit.

In my Dally replication i swept through that range without finding any abnormalities.

Keep on putting out more of your thoughts.

Regards Itsu

Brown and blue is same coil. http://img0.liveinternet.ru/images/attach/c/6/91/684/91684492_large_100_6336.JPG http://img1.liveinternet.ru/images/attach/c/6/91/684/91684493_large_100_6337.JPG http://img1.liveinternet.ru/images/attach/c/6/91/684/91684499_large_100_6338.JPG
First coil have 475 turns of 0.33 milimeters diametr ware or milimeteres2 wire, but probarly diametr. To it go 150 volts about and probarly about 10 kiloherc from small toroid transformer. One end of it conected to ground.[/size]
Then isolation layer.[/size]
Then resonating coil of 0.85 milimeters diameter or milimeters2 with 1.5 mikrofarad 400 volts capasitor.
Then coaxial, 21 turn, end shorted. Going pulses to it center and behind electric...  about 1-10 kiloherc I think.
Then two layers there not winded coaxial is last coil and thrid layer of all lengh. 83 turns = about 12+17+51. 12 turns and 17 is blue wire and 51 turns brown wire. One end seems grounded also, but maybe that not important.
Here is about schematic. http://realstrannik.ru/media/kunena/attachments/3866/Dally---mikmur--3.png


Thats my things.

[MenofFather]

For nanosecond pulses generator used Tr1 small very toroid, 7 mm of diameter, 4 mm center diameter and 2 mm is hight. Primary windings is 6 turns, secondary 12 turns. But yuo can put not 120-150 volts, but let, say, 40 volts, and then primary can be 3 turns, secondary about 15 turns. КД 203 А have maximum backward voltage 420 volts. Maximum pulses backwsrd voltage is 600 volts. Maximum forvard curent is 10 amperes. Working frenquency 1 kiloherc. To transistor base KT296, you can use other, you must put very short pulses with lengh about 100-50 nanoseconds and on output its makes 1 nanocecond.
Maybe not nesaary need 420 ([size=78%]КД 203 А)[/size][size=78%] volts diodes, you can use 100-600 volts diodes. [/size]http://img0.liveinternet.ru/images/attach/c/6/91/488/91488162_large_Dally.JPG
HL1 is halogen lamp like indicator.

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http://speedy.sh/kWkU3/dailynanosecond-pulser.png

[Grumage]

For 100kHz sine wave into 0.4mH inductor:      X_L=2π*f*L       --> 6.283*100000*0.0004 = 251.3Ω
For 100kHz square wave into 0.4mH inductor: X_L=(16/π)*f*L  --> 5.093*100000*0.0004 = 204.7Ω

Inductive reactance for a square wave is always 81% of the reactance for a sine wave of the same frequency.

Dear Verpies.

Many thanks for doing the "sums". So the theoretical quiescent current will be 311 V / 204.7 Ohms.......1.52 Amps. The IGBT's are rated at 25 Amps at 200 KHz so I am hoping all will be good.

I am now in the throes of building the driver board using an IR 2153 as it's heart. It is a neat little thing, I have never used one before!! What is good is that it has a delay between output pulses, ensuring that the Transistors/ Mosfets aren't switched together. Once this part is finished it is on to first testing.

As threatened here a a couple of pic's of T1 and T2.

Cheers Grum.

[verpies]

So the theoretical quiescent current will be 311 V / 204.7 Ohms.......1.52 Amps. The IGBT's are rated at 25 Amps at 200 KHz so I am hoping all will be good.

The IGBTs will be OK if you do not open one of them longer than for several tens of microseconds.

Your average current calculation is correct, but remember, that average current is not the same as instantaneous current.
If you put a 0.1Ω non-inductive current sensing resistor (CSR) in series with the primary winding, and connect your scope across this resistor, then you will be presented with the instantaneous current flowing through it.  A very revealing measurement.

Also, remember that rectified 240V_RMS sinusoidal AC has a maximum voltage of 339.5V - not 311V.  See the attachment.

I am now in the throes of building the driver board using an IR 2153 as it's heart. It is a neat little thing, I have never used one before!!

The IR2153 has one major flaw. Its gate driver circuits are incapable of sourcing/sinking enough current to charge/discharge the gates of big IGBTs quickly. Thus your transistors will be between the ON and OFF state for a long time and they will heat up. Because of that deficiency, their switching frequency will be limited, too.

Also, it's important to keep your wires as short as possible and use one point grounding system (a star).  Watch Itsu's videos at the beginning of this thread for an example.  Also see the attachment below.

P.S.
Non-inductive resistor usually means not wirewound!

[Thaelin]

That point of the discharge rate brings a good question if the dual transistor switching would work better. I have a "parts" board I managed for $10 and it turns out having lots of high speed diodes and IGBT's as well. In the latest Daily circuit, it uses a comp pair to control the e10009's with. Since the IGBT its self has a lag then it should not overlap. Then again, it just may. Test will tell.

Just tested my nano pulser and like it. Still need the 494's tho.

thay