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Overunity Machines Forum



URGENT! WATER AS FUEL DISCOVERY FOR EVERYONE TO SHARE

Started by gotoluc, June 26, 2008, 06:01:38 PM

Previous topic - Next topic

0 Members and 22 Guests are viewing this topic.

nul-points

hi Luc

...replying about switching issues related to your inductor between bridge & 6u8F cap:

from my experiments with similar circuit (pulse charge cap via inductor then separate discharge from cap through following load) i found there is a very small range of acceptable 'charge' times for a particular coil at a required voltage whilst the 'discharge' time from the cap could be varied quite significantly over a wide range


the issue for the inductor seems to be this: if the 'charge' pulse width is too short for a particular inductor & voltage then the input energy is still being used to setup the inductor's magnetic field and it doesn't transfer the maximum possible voltage to the cap

on the other hand, if the 'charge' pulse is too long then there is unecessary 'waste' of energy when maximum voltage has been reached across the cap and there is I-squared-R loss in the copper of the inductor winding


so for my inductor/voltage parameters (approx 2R of 0.45mm magnet wire, random-wound on 12mm x 20mm approx ferrite / 8V) the 'sweet spot' charge time is around 180uS - less than this & my cap doesn't charge to 8V - more than this i start losing efficiency - and with a recorded efficiency of just 120% i certainly don't want to lose any of that precious extra 20%!!  :)

my approach is to vary the PWM by separately varying the 'charge' time with one control and the 'discharge' time with a second control - that way i can keep the inductor switching at optimal 'sweet spot' and effectively vary the frequency of operation by varying the 'discharge' time


i think there is one more important timing issue for your circuit than for mine, however - and it is because the load on your switched cap is another 'inductance' - the auto-coil

i think that you will find there is also an issue of field setup time for the auto-coil Xfr primary as with your bridge-to-cap inductor: there is likely a similar 'sweet spot' setup time - only in this case the field setup time will relate to the amount of charge (hence energy) transferred from the switched cap into the primary

in your case you've found that using your 6u8F cap gives you optimum results - smaller cap values (or higher cap value with more ESR loss) doesn't enable the primary to setup up so much input field (hence secondary output is smaller)

larger switched cap values take longer to charge to the same voltage & use more energy - not all of which perhaps gets transferred to the secondary & therefore the spark gap

we've seen from the video link you shared (user swbNN?) the scope trace on the switched cap input to the auto-coil showed that using HV diodes from top of primary to top of secondary and water spray into spark gap significantly reduces discharge time into the spark gap and therefore increases the spark Power for the same energy

i would say then that with a given switched cap value getting charged to a maximum input voltage from the AC bridge/coil combo then there will be a 'sweet spot' minimum discharge period into the auto-coil - too short & the spark energy will be reduced - any longer than this will just become an inter-spark delay (which will become part of the ICE firing cycle anyway, i guess?)

in summary: for a given inductor / switched cap / auto-coil arrangement: adjust initial 'charge' time to just enough to get max charge voltage, no longer - then adjust 'discharge' time to just get max spark power, no longer - then adjust remaining inter-spark time to get required frequency of spark

hope this helps

all the best
sandy

Doc Ringwood's Free Energy site  http://ringcomps.co.uk/doc
"To do is to be" ---  Descartes;
"To be is to do"  ---  Jean Paul Sarte;
"Do be do be do" ---  F. Sinatra

gotoluc

Quote from: nul-points on August 24, 2008, 09:50:25 PM
hi Luc

...replying about switching issues related to your inductor between bridge & 6u8F cap:

from my experiments with similar circuit (pulse charge cap via inductor then separate discharge from cap through following load) i found there is a very small range of acceptable 'charge' times for a particular coil at a required voltage whilst the 'discharge' time from the cap could be varied quite significantly over a wide range


the issue for the inductor seems to be this: if the 'charge' pulse width is too short for a particular inductor & voltage then the input energy is still being used to setup the inductor's magnetic field and it doesn't transfer the maximum possible voltage to the cap

on the other hand, if the 'charge' pulse is too long then there is unecessary 'waste' of energy when maximum voltage has been reached across the cap and there is I-squared-R loss in the copper of the inductor winding


so for my inductor/voltage parameters (approx 2R of 0.45mm magnet wire, random-wound on 12mm x 20mm approx ferrite / 8V) the 'sweet spot' charge time is around 180uS - less than this & my cap doesn't charge to 8V - more than this i start losing efficiency - and with a recorded efficiency of just 120% i certainly don't want to lose any of that precious extra 20%!!  :)

my approach is to vary the PWM by separately varying the 'charge' time with one control and the 'discharge' time with a second control - that way i can keep the inductor switching at optimal 'sweet spot' and effectively vary the frequency of operation by varying the 'discharge' time


i think there is one more important timing issue for your circuit than for mine, however - and it is because the load on your switched cap is another 'inductance' - the auto-coil

i think that you will find there is also an issue of field setup time for the auto-coil Xfr primary as with your bridge-to-cap inductor: there is likely a similar 'sweet spot' setup time - only in this case the field setup time will relate to the amount of charge (hence energy) transferred from the switched cap into the primary

in your case you've found that using your 6u8F cap gives you optimum results - smaller cap values (or higher cap value with more ESR loss) doesn't enable the primary to setup up so much input field (hence secondary output is smaller)

larger switched cap values take longer to charge to the same voltage & use more energy - not all of which perhaps gets transferred to the secondary & therefore the spark gap

we've seen from the video link you shared (user swbNN?) the scope trace on the switched cap input to the auto-coil showed that using HV diodes from top of primary to top of secondary and water spray into spark gap significantly reduces discharge time into the spark gap and therefore increases the spark Power for the same energy

i would say then that with a given switched cap value getting charged to a maximum input voltage from the AC bridge/coil combo then there will be a 'sweet spot' minimum discharge period into the auto-coil - too short & the spark energy will be reduced - any longer than this will just become an inter-spark delay (which will become part of the ICE firing cycle anyway, i guess?)

in summary: for a given inductor / switched cap / auto-coil arrangement: adjust initial 'charge' time to just enough to get max charge voltage, no longer - then adjust 'discharge' time to just get max spark power, no longer - then adjust remaining inter-spark time to get required frequency of spark

hope this helps

all the best
sandy

Doc Ringwood's Free Energy site  http://ringcomps.co.uk/doc

Excellent Sandy,

this is great help and confirms what I thought would happen. Each step and components of the circuit will needs to be tuned before one can achieve a high level of efficiency.

I am not completely clear on this " (approx 2R of 0.45mm magnet wire, random-wound on 12mm x 20mm approx ferrite / 8V) "

What does 2R stand for in layman terms?

you say the 0.45mm mag wire is random-wound!... does that mean it is not nicely wound next to each wire row by row like a coil?  if so, it is somewhat loose and just quickly wound like if you would wind twine on a stick?  if so, have found this to give a better effect (efficiency)?

and last, what is / 8V stand for in layman terms?

I really appreciate all the information and circuit diagrams you have shared in this topic Sandy. And I am sure many are in the background just reading and learning even though they don't post. I know I mostly did that when I first came to this Forum some years ago.

All this to say that your contribution is more then we can realize.

Thank you for your great service to humanity.

Luc



professor

Hi
You might want to reverse the BY255
Tnx
Professor


Quote from: Groundloop on August 24, 2008, 05:01:34 AM
Luc,

Attached is the same simple circuit with external trigger input.
Note: Adjust the SCR trigger voltage BEFORE switching on circuit.
This circuit can be used with external trigger in an engine enviroment.

Groundloop.

Chris31

Hi all

Im new here so go easy on me  ;D

I saw the circuit yesterday, bought all the stuff from maplin. The circuit is based on gotoluc simplified circuit as posted on page 1

The parts are :

2x 1,000uF 200V capacitors (pull from an old PC ATX PSU)
Wipac CL300 ignition coil (not sure what car is for, I bought the cheapest)
6x 1N5408 diodes
12V power relay
240-110VAC transformer (45W UK-USA converter)
KBPC35-04 bridge rectifier

Im just basically charging the capacitor by energizing the relay coil, on release the charge is dumped into the ignition coil.

I was originally using a 47uF 400V capacitor but that didnt do much. So I used 2 of those, result got better. I finally decided to pull out the 2 caps from the old ATX PSU I had lying around, used short thick speaker cables together with the power relay. Finally a big bang and lots of purple flash is produced, it started to hurt my eyes after a couple of tries, I have to turn my back when firing.

So far so good, next step is to spray water, that made the sound much more snappier and bigger orange flash. Sounds good, I can definately hear explosion there.

Spraying the sparks with water sometimes drown it and refuse to spark, here comes a small fog machine for consistent results. Immersed in a polystyrene cup with water, made 2 holes to pass the nails.

The fog machine create a small fountain and sometimes hit the nails so I had to cover it such that only the mist get to the nails, again excellent results. Ignore the red light thats comming the fog machines LED.

I wasnt convince its creating explosion, place a small strip of polystyrene just above the nails, bang, big orange flash,  piece of polystrene did not move.  :-\

Next step, I use a syringe, put 2 enameled copper wire through and sealed with plastic glue then gap the wires inside accordingly. Fill it with mist, then compress it. same results, nothing moves. Sound like massive explosion but definately nothing is happening there.

I was so excited to build the electronics for it, I feel that I cant move on until Im convinced a real explosion is happening.

:(

Am I missing something here?

In the mean time, Ill be doing more reading and testing.

:)

Groundloop

professor,

No, the BY255 is correct in the circuit drawing. The BY255 is used as a "free wheeling" diode to
protect the TIC106D from back emf voltage spike. Look at the circuit drawing again. The capacitor
will be charged with plus voltage facing the TIC106D. When the SCR fires the plus voltage will
go to the coil into the bottom. At this time the BY255 is closed. When the pulse fire is done the
coil will flip polarity (back emf voltage) and the BY255 will then open and take care of that.

Groundloop.