Signature of water spark effect on oscilloscope
Gmeast from the energetic forum has traced the signature of the effect on a scope.
Gmeast from the energetic forum has traced the signature of the effect on a scope.
This is Revizals latest video showing the effect of the plasma spark in action while running his motorbike engine. He has hooked up a secondary plug out side the engine to show the effect that is happening inside. What is most interesting is he notices his exhaust is clear when the plasma spark is in action.
Originally Posted by smw1998a at the energetic forum
Hello All,I have been thinking hard on this one Further study of scope traces have provided me with a better insight into what the effect actually is. I was wrong about the reduced resistance, it’s actually far more simple than that.
My scope shows that my secondary coil rises to spark 20uS after the SCR conducts. During this time my capacitor drops from 200v to 180v. Before the voltage on the secondary winding gets high enough to arc across the gap there is only one path for the energy stored on the capacitor to get to ground, through the primary winding.
The addition of the diode in the circuit does a very simple thing. Once the arc has formed, the energy stored in the capacitor has a new path to ground via the HV diode and the arc. There is so little resistance in this new circuit path that it is as good as a dead short across the capacitor terminals. CRACK A disruptive capacitor discharge straight to ground.
The poor ignition coil has had 20v (200v to 180v) dropped across the primary winding in barely 20uS. There is just enough voltage on the secondary to arc across the gap and CRACK… No more energy in the capacitor to deliver to the primary winding and drive the voltage up in the secondary to maintain the arc. The ignition coil has had the rug well and truly pulled from under its feet. Being a coil with a sudden loss of current, the magnetic field collapses. There was so little energy stored in the magnetic field of the coil at the time the capacitor shorted its energy across the gap that the BEMF is insignificant.
There are a few significant points here. The diode/s are important because they have to hold back a reverse voltage as the secondary rises into the KV range before there is enough voltage to create the arc. Once the arc appears it is like shorting a 200v capacitor out with a diode, anode to positive cathode the negative. Increasing the voltage on the capacitor to over 300volts, assuming the cap can handle it, will not stress the ignition coil with the HV diodes in place. It may, however, increase plug ware no end.
With increased voltage on the capacitor you will have a very violent discharge across the arc. Due to the fact that the capacitor shorts across the arc as soon as it is formed the duration of the spark event is very short, much shorter than a standard HT spark.
I have wondered where all the apparent energy came from. When I drove the ignition coil inductively via a 555 timer and transistors, that circuit used almost 4 Amps and everything got hot. My batteries got battered by that circuit and I was plagued with transistor failures.
My current circuit does what it does on 1 amp@ 12v. I have managed to squeeze a frequency of 48Hz out of my charge pump, charging the cap to 200v. Although the charge pump transistor does get warm, nothing else does and other than initial 7555 failures, I have not lost a component on this circuit after many hours of testing.
All The best Lee…
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