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Been looking at the QEG in more detail. Did a FEMM simulation to establish how the inductance of the 3100 turn coils changes with rotor movement. The chart shows the inductance going from 20 H when the rotor is in line with the spigots to 5H when the rotor moves 45 degrees (originally I said 22.5 degrees but that was wrong), half way between the spigots. And that is with an air gap 0.033 inch (the smallest I could do in FEMM) whereas the drawing shows a gap of 0.013 inch. So the real thing would have an even higher maximum inductance!. Those values are too high for the claimed 400Hz resonance. But of course it all depends on the actual mu of the materials used, and FEMM may not reproduce the correct value.
So turning to parametric pumping of the high voltage tank circuit, I did a simulation in Excel using a clipped cos^2 function as the best fit to the inductance (see chart). That huge inductance change is somewhat overkill for such pumping, you get better results with smaller changes, but it does pump the voltage up to high kilovolt levels and then you can extract power. I simply include a series resistor in that tank circuit and calculate the power in that. That eliminates the need for the other winding (but it would be required to step down the voltage in a practical design). I can adjust the rotation speed to match the LC resonance of that tank circuit for maximum pump action. When I get something that works well I will modify my FEMM to create the correct inductance changes (like thinner spigots so as to get inductance spikes over smaller degrees), then apply the Excel results to the coils in FEMM to discover the torque waveform and power input. All this so far without any magnetic delay.
Smudge
« Last Edit: 2014-11-02, 09:24:44 by Smudge »
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Topic: 10KW - Quantum Energy Generator - open source (Read 36233 times)
