TurboPlasma Power Amplifier/Generator System Energy Correlation Experiments (2)
The top trace of the scope shot above (Y1) represents the current waveform drawn by the power supply system of the TurboPlasma Generator. The bottom trace (Y2) is the modulation envelope of the RF carrier wave output from the plasma electrodes. Note the typical but not always inverse relationship of the amount of current drawn by the system, and the energy of the carrier wave. What is going on here?
Again, here is our experimental arrangement:
It may be illustrative here to use a simulation from MicroCap 5 of a different mixed digital/ analog circuit design that compares the current (I) waveform of the power supply node (Node 11) and the current waveform of the ground leg of the power output transistor (Q4). The two waveforms exhibit directly proportional characteristics EXCEPT for the appearance of a few short duration "spikes" at various points along the time (->) axis (graph, below). These spikes are switching transients that only appear for intermittent and very brief periods of this particular circuit's operation. The spikes, unlike the other portions of the waveforms, have inversely proportional amplitudes.
Note that Node 11 is the junction of the 1 ohm resistor (R6) and the system power supply, and would correspond with Test Point 1 (TP 1) of our experimental arrangement.
In the Plasma tube, before an arc channel develops the power system is creating a magnetic field in the flyback (high voltage transformer) primary. This is an inductive process involving a high current, loading down the system power supply in order to increase the transformer's secondary voltage . Then when the arc channel finally fires at the peak of the secondary voltage increase, the magnetic field of the transformer secondary collapses creating a reverse (bucking) current in the primary, which opposes the normally positive value of the supply current, while at the same time the arc channel is dumping the energy from the collapsing field as RF Emissions and visible light.
Jim O. 10/07/05