FUELLESS CAR PROTOTYPE by ISMAEL MOTOR

[Qwert]

...it went from 11vdc to aproximately 40vdc! output from the fwbr and caps, wow huge increase! ...

Hi, guys. Isn't this the same effect as in an ordinary automobile ignition coil? An explanation is here: http://www.overunity.com/index.php?topic=6763.msg302309#msg302309

I also found interesting articles worth consideration:
http://en.wikipedia.org/wiki/Marx_generator
and another, you cannot use this link independently, only from the above given "Marx" link:
http://en.wikipedia.org/wiki/croft-Walton_generator

[johnnymx]

hi cone and all thanks for your info i´m go to next step, i build oscilator with 555 /variable frecuency and variable duty i have not too much time but i do what i can, this is my pulse motor:http://www.youtube.com/watch?v=38QiFhXOwHU

[konehead]

Hi Qwert

No its not the same thing as ordinary car igniton coil which takes 12V and shoots it up to 15,000V bursts into sparkplugs...those will have a primary and secondary wind - the primary is thick wire, the secondary is super thin wire plus lots of turns...you dont get any "gain" in power since with that 15,000V you have like .0001 amps (just guessing tha amps)
That said, Ovi Fetch does have a special igintion-coil circuit that uses coil-shorting method in it that works on a motorcycle...so if you want to you can use coil shorting to ramp up voltage gitime into caps, and then cap discharge to plugs.
He says some car or motor cycle companies do some coil-shorting in their electronic iginiton systems but its propreitary and sort of secret in what they do he says.

[crazycut06]

I assume you have the 9V transformer with its HV side attached to grid?
then your only adjsutment is the pulse width of this through a PWM tied to the mosfets?
If so, then it doesnt seem you are actually shorting at peak-period only - if you did this, you might get 100-150Vdc into the same cap during same amount of time...and no extra draw to primary at all if pulse width is not too wide...


Yes that's correct, what if i use a pwm with a duty cycle & frequency control? would it be more adjustable and would i get the 100-150Vdc? or maybe more? and thanks for the circuit, ill surely try it... G.b.u...

[konehead]

Hi Crazycut

having the short trigger tight at the sinewave peak is what you need to do in order to get really good performance along with no extra draw to primary.
pulsewidht adjstu after that is needed too...frequency control of the actual chopping of the peak period is what you want...not so much the frequency-contorl of the feed-signal itself although why not have that too.

becasue you are using a transformer off the grid, you need someway to sense the peaks - if you had a rotating rotor with magnets in it, like a Mullergen or someting similar, with spinning rotor inducing power into coils its easy to do since you can rig up halleffects or whatever to be triiggered by the shaft rotation, or if small magnets in rotor, you can trigger halleffects with the rotor magnets themselves - or use a light sensor or even common motor brush-commutator...but if nothing rotating like what you have, you need somehtign to sense sinewave peaks - thats what those circuit I put up do - the first pot finds your peak period, 2nd pot decides capture-width of this peak period, 3rd pot chops up that capture-pereiod into pulses...you can do one big pulse or lots of small ones...other way is a toy strobelight circuit to sense peaks not sure about this havent tried that way...what you do is attach yoru mosfets to those sinewave peak circuits and they trigger the mosfets that do the coil-shorting.