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  • jstadwater
    replied
    Thanks,

    That's where I was going to try it, after the transformer, just wanted a second opinion. If I fry another inverter I'll just add it to the group already on the floor.

    I will try it initially with 100 watts @ 200 ohms resistence and see what happens. Another question to anyone who may know. If the resistor is moved to the new suggested location, in front of the bridge, will it still play the same role as to limit the charge time of the capacitor? OR with it in the AC side of the circuit, would we have a wider range of resistence to play in without cutting our charge time to the capacitor?

    Later............................................. Mike

    Leave a comment:


  • Ansis Freimanis
    replied
    To jstadwater

    If You have inverter + Isolation transformer, than You must put it after isolation transformer- before bridge. (I think so).

    Leave a comment:


  • jstadwater
    replied
    Hello everyone,

    Wasn't here yesterday, busy moving into new house. What a job that is turning out to be! I have not tried anything with the circuit since Saturday. It is possible that my inverter was making contact with one of the bolts on the fan shroud where it was sitting. I did have the isolation transformer strapped to a metal box mounted to the front of the Suburban, that was surely making contact with vehicle ground.

    Now, about moving the resistor to between the inverter and bridge, or voltage tripler in my case. If this will better protect the inverter, I'm all for it! I just got in four new slide resistors, 100 watt rate and up to 250 ohms each. With the voltage tripler I am charging to about 425VDC, how much resistence should I use? And should I move the resistor from it's present location between the bridge and capacitor, to between the inverter and bridge? Before or after the isolation transformer?

    Excited as always to do new tests and further the circuit, looking forward to hearing you guys' thoughts. Later...................................Mike

    Leave a comment:


  • revizal
    replied
    Originally posted by Ansis Freimanis View Post
    Hi! I am making my experiments with 1 n-p-n Darlington transistor and 30-40KHz frequency and all is fine. I look at Your circuit and I think You make good choise- You put Lamp 100W between bridge and transformer ( in UPS is this kind of circuitry). It is very right becouse (some experimenters think the spikes from Spark plug make the "dead inverter") but my understanding is little bit "upside- down"...
    I think inverter go dead when no load is happening. It is between discharge: voltage is jumpig up and down and in this moment voltage go high too much and all this make transformer to saturated condition. After this core start heating up and primary current go up, up, up and... dead.
    When You put 100W lamp between- it make "always load" situation. No process of saturation.
    Yes, I saw yours and this's very interesting to find the best way to supply voltage to the circuit. A 100 watt lamp is a good way to supply continues power to the circuit but it make not just a simple one which we need. I think the right way is what Aaron done on his lawnmower with a resistor. A simple calculation, if we put 220 V to the circuit and want to keep 0.45 A we need 100 watt load on it (such 100 watt bulb). With a resistor it must be 488 Ohm (100 watt rating) displacing the bulb to keep 0.45 A current. This is a minimal requirement. I donot know what the actual fact, because I donot have a 100 watt or more rating resistor.
    But the basic situation is what you said before that we need a continues loading stuff infront of the the inverter to make it worked. No matter how, by using bulb or resistor or anything else.

    Regard,

    Revizal.
    Last edited by revizal; 10-28-2008, 11:31 AM.

    Leave a comment:


  • Ansis Freimanis
    replied
    to Revizal

    Hi! I am making my experiments with 1 n-p-n Darlington transistor and 30-40KHz frequency and all is fine. I look at Your circuit and I think You make good choise- You put Lamp 100W between bridge and transformer ( in UPS is this kind of circuitry). It is very right becouse (some experimenters think the spikes from Spark plug make the "dead inverter") but my understanding is little bit "upside- down"...
    I think inverter go dead when no load is happening. It is between discharge: voltage is jumpig up and down and in this moment voltage go high too much and all this make transformer to saturated condition. After this core start heating up and primary current go up, up, up and... dead.
    When You put 100W lamp between- it make "always load" situation. No process of saturation.

    Leave a comment:


  • K1w1
    replied
    Branching

    I just wanted to note that with the success of the nexus and vexus circuits we have passed phase one of the development process. With the recent suggestions for improvements from Luc and Naresh it appears we are fast approaching the start of phase three and looking like a couple of new branches on the tree.

    This is excellent progress so everyone should be very satisfied with the pace of development so far.

    Leave a comment:


  • K1w1
    replied
    diesel fuel

    @Chris31

    Revizal has done some work with diesel in a standard gasoline engine with very positive results. It would be great to get some secondary verification.

    Check out Yes! Water is Fuel for a compact overview of the past three months development. I have linked to several of his videos on you tube in the archive.


    Leave a comment:


  • Chris31
    replied
    Hi all

    I have been observing the effect of the plasma sparks for the last 2 days.

    The simple test is...

    Spray some alchohol inside the cylinder of a 2 stroke engine. No carb, no muffler, Im just using the engine to compress the mixture.

    The result is definitely a stronger explosion. Tried with the piston at the bottom, a larger flame spits out of the exhaust.

    I also tried this with light oil (penetrating oil), the plasma is able to ignite it. Black smokes and it smell like diesel engine under acceleration

    Tried with veg oil, there is a small movement of the piston.

    Tried with water, nothing.

    The only way for it to ignite water is to mix it with fuel, I used alcohol.

    This is why I believed that those who tried with water and got some piston movement, I think its due to some fuel still left inside the engine.

    Im not too sure if someone have tried before but I will get some diesel fuel and try to ignite that with plasma.

    It can surely ignite lean mixture so thats good news.

    Leave a comment:


  • Chris31
    replied
    Originally posted by gmeast View Post

    Reply:
    I did the test and the paper mass is too great for an ignition but I did get a burn speck on the paper. I'll try and photograph it and post.

    Greg

    .................................................. .............

    Hi all,

    Here are some pics of the paper burn specks.

    The circuit is VexUs using 3uF CDI cap, a 22uF storage cap, homemade two transistor oscillator / inverter with voltage doubler (diode - cap ladder).

    Greg

    ..... then I put the paper back and ran it at high speed for a couple of seconds ....
    Hi Greg

    Thanks for the test. I was also able to burn through the paper, I though I mention it as it could be important in what we are trying to do here.

    Leave a comment:


  • turbotrana
    replied
    Lapper are you able to give a diagram of your final setup.

    In Aust we only have 240volt inverters. How would I mod the circuit to accomodate this.

    My car would be perfect to test this ignition system as I have programmable engine management system/wide band a/f ratio meter and I have been experimenting with lean burn/economy tuning for the last 6 months
    Last edited by turbotrana; 10-28-2008, 06:01 AM.

    Leave a comment:


  • turbotrana
    replied
    I see this plasma ignition system as being one component out of three to getting alot better fuel economy. On its own with no other adjustments you will certainly get gains but not the full potential from my own experiments with the ICE

    I think the main gains will be in the ability of this spark to burn really lean mixtures i.e the 18:1+ a/f ratios. This is where I see the main economy gains. Its easiest to experiment with a fuel injected car. You need a programmable engine management system with wide band A/F ratio meter where you can see whether the plasma spark is able to fire leaner mixtures compared to a normal strength spark.

    Also if you are running fuel injection I have found good gains in the type of injector used. The bosch EV6 injector atomises the fuel better than any other common injector on the market that I know of and it gives REAL gains. If your car has the older EV1 pintle injector a change is very worthwhile.

    Leave a comment:


  • ashtweth
    replied
    FYI From Naresh


    I see youtube videos about a nexus design and about a vexus design.

    What's the difference between the two?

    Of all the schematics I see on the internet, it looks like they all
    basically dump a pulse of lower voltage from a capacitor once the
    lower voltage arc current path has been established from the ignition
    coil.

    So then I started think, what would be the best voltage level to store
    and dump from a capacitor?

    This equation shows how much a capacitor can store:

    E=1/2*C*(V^2)

    or

    Energy Stored on a Capacitor

    so it seems like if I stored a higher voltage on a smaller capacitor
    it would work better since the amount of energy stored increases
    faster with the voltage increase than with the capacitance increase.

    Also, the ignition coil already provides the higher voltage.

    I can just delay the ignition coil's pulse to the spark plug with a
    few turns of the cable around some soft iron.

    At the same time just off the HV line from the coil I could send it to
    a HV capacitor made of a Teflon cooking sheet rolled up with aluminum
    tape of each side.

    Teflon has a very high dielectric constant. A 1mm thick sheet is good
    up to 60KV.

    I wouldn't need a big capacitance since that voltage gets squared in
    that equation so it ought to be the biggest contributor to the amount
    of energy stored.

    Then the only problem is the pulses would go through the distributor
    to get to the plugs and so may erode the distributor, but hey, its
    going to erode the plugs also anyway if I have too strong of a plasma.

    Has anyone tried it this way already?

    Naresh

    Leave a comment:


  • Gibs
    replied
    Improvements

    Originally posted by lapperl View Post
    Well I should have gone with my gut instinct, it is usually right.

    I stopped on the way home and purchased some Champion Platinum spark plugs and left the factory gap setting on 25 thousandths. I figured what the heck they should hold up better in the long run and they were only $2.99 each. I proceeded to re-route the kick wires and shield them with some high voltage shielding that is used on neon signs. When I was on the last plug I realized that the plug wire was not fully engaged on the spark plug.

    I also noticed that when I removed the resistor from the spark plugs, there were two where it looked like the #12 copper wire I replaced the resister and spring with were shorting on the inside as if they were too short. I know they were all tight with a good connection. So on the platinum plugs I left the spring in.

    We needless to say, it was a 100% improvement. No hesitation at all All is back to above normal. There is a definite increase in power. I do not have to press the accelorator pedal as far to accelerate from a stop and it absolutely idles much smoother. I guess running on all four cylinders will do that.

    So I took it for another little test drive (aprox. 15 miles) to the gas station to top off the tank and a little drive around town. Like I said, much improvement.

    Next update will be plug condition after a full fuel tank and mileage increase or decrease.

    Until Next Time,

    LapperL

    Hi Lapperl,

    Your enthousiasm is contagious. Can't wait to get your results!

    I like when you say "above normal".



    Gibs

    Leave a comment:


  • ashtweth
    replied
    Thx Greg and Well done lapperl!! Is it just me or does that look like the water spark pug effect in the video. If it is , then perhaps it wont be as much wear
    Last edited by ashtweth; 10-28-2008, 03:21 AM.

    Leave a comment:


  • lapperl
    replied
    Bill's Nexus Circuit Vehicle Install Update

    Well I should have gone with my gut instinct, it is usually right.

    I stopped on the way home and purchased some Champion Platinum spark plugs and left the factory gap setting on 25 thousandths. I figured what the heck they should hold up better in the long run and they were only $2.99 each. I proceeded to re-route the kick wires and shield them with some high voltage shielding that is used on neon signs. When I was on the last plug I realized that the plug wire was not fully engaged on the spark plug.

    I also noticed that when I removed the resistor from the spark plugs, there were two where it looked like the #12 copper wire I replaced the resister and spring with were shorting on the inside as if they were too short. I know they were all tight with a good connection. So on the platinum plugs I left the spring in.

    We needless to say, it was a 100% improvement. No hesitation at all All is back to above normal. There is a definite increase in power. I do not have to press the accelorator pedal as far to accelerate from a stop and it absolutely idles much smoother. I guess running on all four cylinders will do that.

    So I took it for another little test drive (aprox. 15 miles) to the gas station to top off the tank and a little drive around town. Like I said, much improvement.

    Next update will be plug condition after a full fuel tank and mileage increase or decrease.

    Until Next Time,

    LapperL

    Leave a comment:

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