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Author Topic: Kapanadze Cousin - DALLY FREE ENERGY  (Read 11715575 times)

verpies

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #345 on: October 12, 2012, 03:19:10 PM »
Probably the toroidal pulse transformer has a very low inductance and current is growing beyond expected in the drain. I had to increase the number of turns to avoid that. Had exactly this problem before.
I don't think Itsu connected T2 yet. 
He is using a 100Ω resistor between the Drain and Vcc to load his MOSFET for testing.

itsu

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #346 on: October 12, 2012, 03:23:18 PM »

Ok verpies,

i was expecting you would say something like this :-)
There is no fast and easy way to test this thingy he? Everything needs to be perfect.

Ok, i will need to take care of this 2e voltage supply the same way i did with the primary PS, meaning follow your points 1 to 4 above.
Thanks a lot.


Black_bird,

i presently am not using "the toroidal pulse transformer" to supply 200V to the nano-pulser, but a separate PS with a variac so i can regulate this voltage. 

Regards Itsu

verpies

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #347 on: October 12, 2012, 03:44:19 PM »
I was expecting you would say something like this :-)
There is no fast and easy way to test this thingy he? Everything needs to be perfect.
Unfortunately, there is not an easy way :(
Once you start counting the nanoseconds you must start counting the millimeters.

You are still on the easy road.  Once you get to that saturable transformer and the DSR Diodes then the road will really start curving uphill.
Despite appearances, transformers are the most complex electronic components.  Even more so when their saturation effects start to matter.

verpies

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #348 on: October 12, 2012, 03:57:09 PM »
3) Putting good bypass capacitors across the Source and the Vcc, at the point where the Load Resistor is attached.
I forgot to mention that a "good bypass capacitor" is the parallel combination of low-ESR high value (≥100μF) electrolytic and low value (≈100nF) ceramic capacitors, with short leads positioned as close as possible.

mihai.isteniuc

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #349 on: October 12, 2012, 05:03:21 PM »
I have start working today on the second oscillator (TL494). From my measurements the frequency can be varied from 6Khz up to 210KHz.
 
Duty cycle can be varied from 40-60 until the oscillations are gone. I think the 10K resistor connected between terminal 2 of TL494 and the 22k variable resistor it's to small. Seems more like 15k to me to be the correct value, but for the first stage of the replications I will live it like Dally.
 
Can somebody confirm?
 
Mihai

d3x0r

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #350 on: October 12, 2012, 05:37:21 PM »
I have start working today on the second oscillator (TL494). From my measurements the frequency can be varied from 6Khz up to 210KHz.
 
Duty cycle can be varied from 40-60 until the oscillations are gone. I think the 10K resistor connected between terminal 2 of TL494 and the 22k variable resistor it's to small. Seems more like 15k to me to be the correct value, but for the first stage of the replications I will live it like Dally.
 
Can somebody confirm?
 
Mihai
That is approximatly what Itsu and I have... For operation I think you will be on the upper side of the frequency and the lower side of duty cycle.

verpies

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #351 on: October 12, 2012, 06:29:53 PM »
I have start working today on the second oscillator (TL494).
From my measurements the frequency can be varied from 6Khz up to 210KHz.
By adjusting P1 at pin 6 of U1 ?

Black_Bird

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #352 on: October 12, 2012, 06:29:55 PM »
@itsu

I was referring to the output transformer for the pulse, in the drain of the MOSFET. But as verpies said, you are still not using it.

verpies

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #353 on: October 12, 2012, 08:00:11 PM »
Duty cycle can be varied from 40-60 until the oscillations are gone. I think the 10K resistor connected between terminal 2 of TL494 and the 22k variable resistor it's to small.
The duty cycle on the TL494 can be varied from 3% to 97% by the error amplifiers and P2, it just has to be connected differently.
Like this:

mihai.isteniuc

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #354 on: October 12, 2012, 10:18:06 PM »
By adjusting P1 at pin 6 of U1 ?

Yes Verpies. That is correct.
 
The convertor it's done. I have to make a few refinements and find a suitable transformer to drive it. Best effort right now it's 50V on one of the secondary. I'll get back to you when it will be really completely finish with details.
 
Any other details you or somebody else need please post them. I'll be more then happy to answer.
 
Mihai

d3x0r

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #355 on: October 13, 2012, 04:40:48 AM »
Working on TL494 side.  So this is actually a very high power part (high amp anyway)


(reads pdf of tl494 specifcation ; what does this thing do anyway... oh okay)


As a reminderI'm using the 2n5401/E13009 version {was browsing the two versions, and notice there is a difference using pins 9 and 10 of the U1 }  There's a 1k resistor pulldown to ground, if I increase that I would get more through the 2n5401; which are used for audio amplifiers to 200mhz... so it drains excess voltage from 9 and 10 (which I guess are only 250mA) from C1 and C2 (8 and 13) which is power;

In my picture, the blue probe is on P9, the ground of that probe is unconnected
the yellow probe is on a 0.11 ( 3x0.33ohm resistors in parallel, each 125A ).  with the ground on the power side, and the probe on the coil side of the resistor. 


It's all connected in the circuit, so there's a ringing from some sources...


the second picture (can I put pictures in-line?)  Is tuned at a different point in the frequency adjustment of U1...
the first picture is at a much higher frequency, so it's able to pull down more voltage on the driving coils...


the time in the first two is 200ns, so that's a 200 ns pulse from U1  frequency is larger than this frame... but the third is a picture of an overall... sometimes there is more of a rininging that happens instead of a nice pulse... but I dunno, I'm not getting to saturation, but I'm not really at V/R?  Or am I?




On top of that... if I change the mounting point of the power to the coil from internal board power it works differently also....  that is; I have 3 diode points to connect to, 1 25kV (hgih resistance) 1 1n4001 and 1n4004 , each connected on my power rail, and a 1ohm resistor... depending on where I connect I get other effects on the power of the circuit; that is, it makes my +12 kinda dirty,but through the 1n4004, it doesn't cause as much bounce. I increased the capacitance on the overall power... but maybe I should add that my power supply is connected to my apparatus through two Diodes each in normal conducting direction, and a 1ohm resistor on the negative, with some capacitors across power rail and ground rail after all of that, and a reverse diode uhh 1n4001 I think (only a 30V power supply)  with cathode on positive, in case that is driven low by back feed, empty capacitors, and exceeding limits of the supply, which is set about 12.xV limited with 1.5A limit probably, but if I'm using that much, E13009's get really hot... well unless they have a good on/off, it's more when they are kinda in a grey zone of conducting that they get hot....




See also http://youtu.be/1DOD-uFaHLk 


I should increase my capacitance  across the neons... but since they cap the voltage... I'm certain that the


Hmm somehow I think I ended up shutting it off early... I think if I had a bigger current available rather than 250mA, it could be driven more to saturation... I do see the front and tail of the saw tooth that should be there, but the top is terribly chopped, and some other thing is capping it. 
« Last Edit: October 13, 2012, 07:14:50 AM by d3x0r »

d3x0r

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #356 on: October 13, 2012, 07:45:43 AM »
I solved (for a second) my concern about the amount of power available.  I installed a 400V 80uf cap across the neon bulbs.  Now, once I turn it off the neons stay lit for like 10-15 seconds all on their own... and there's plenty of spark left in the capacitor.


Hah nevermind :)  Yes, it's a lot of joules, but it drains in 250ms, and charges in 6s... (something like that) 
I either need to slow the pulser, or figure out how to get more high voltage watts.


----
Oh I found some info on the particular toroid I'm using....


http://www.ferroxcube.com/prod/assets/3c90.pdf
http://www.farnell.com/datasheets/491631.pdf  (TX58/41/18)


http://www.newark.com/ferroxcube/tx58-41-18-3c90/ferrite-toroid-58mm-3c90/dp/63R5862
« Last Edit: October 13, 2012, 09:07:12 AM by d3x0r »

verpies

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #357 on: October 13, 2012, 11:35:17 AM »
the yellow probe is on a 0.11 ( 3x0.33ohm resistors in parallel, each 125A ).  with the ground on the power side, and the probe on the coil side of the resistor.
I hate to write this to you but your current waveform is all wrong, because:
1) You are using inductive wirewound resistors for your current sensing resistors (CSRs) - marked with blue ellipse on the photo.
2) The high current and high di/dt wires are too long and they are acting as inductors. (they should be 3 inches at most)
3) You are not using starpoint grounding and starpoint power distribution (see diagram)

I'm afraid that you will have to replace your CSRs with non-wirewound resistors, rewire your circuit's ground/power and redo your measurements :(

d3x0r

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #358 on: October 13, 2012, 11:49:00 PM »
I hate to write this to you but your current waveform is all wrong, because:
No worries; so I guess the back spike is the field behind collapsing
1) You are using inductive wirewound resistors for your current sensing resistors (CSRs) - marked with blue ellipse on the photo.
Of course those aren't right... I couldn't have luck and pick the part that was high enough current  and not be inductive :) 

2) The high current and high di/dt wires are too long and they are acting as inductors. (they should be 3 inches at most)
Just to confirm, was looking at dally pics,... and the power wire would be one of the white wires coming off the toroid, but disappearing beneath the tl494 board;  the other two from two different posts go to a green screw down connector on the edge of that board... those are all thinner wires than the wires on the atx power supply... so they don't have to be so thick?
3) You are not using starpoint grounding and starpoint power distribution (see diagram)
I actually am... although the wires are ~1.5 feet long, and would be measured in nano-henries... if I connect a second one in series there is a modification to the readings, so removing that would be good, but basically the power goes here, and from that power point I power the one board, and the nanopulser is chained off of that further down...but it has its own voltage regulators... and really all the grounds go to a fairly common ground point, but I can see putting the emitters(?)(sources?) of the inverter closer to the ground source...
I'm afraid that you will have to replace your CSRs with non-wirewound resistors, rewire your circuit's ground/power and redo your measurements :(
Most of it is rewired, but :) What I do have is 8 inches of 32 gauge wire which should be .1 ohm... but it's far from high current...

itsu

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #359 on: October 14, 2012, 12:27:01 AM »
@all,

Ok, made some changes as adviced by verpies, and the signal on the drain of the MOSFET improved dramatically.

I now have a nice sharp 200V pulse of about 70ns which can be varied by a 10Kohm potmeter till 500ns.
Repetition rate of the pulse can be varied between 700Hz till 350Khz (not shown in the video).
Video here: http://www.youtube.com/watch?v=ACNzggg1QC0&feature=youtu.be

Next step will be to hookup the small toroid and the DSRD diodes and hunt for the 1ns/1KV/1Khz pulse

Regards Itsu