interesting post webmug,
should one attempt to get theses values?
say, have you done this calculation on don's measurements?
thanks for posting!
~Russ
@russ,
The coils inductance/ capacitance Don has measured are
not the values on SRF but on (100,120,1k,10kHz) but yes I used them for the model.
Don also wrote that he only measured one coilpack and he has seen the coilwinder Meyer used and he wrote that he expected the coils on the other coilpacks would not have the same exact values. So my conclusion is that there is a L,C,R ratio/factor/coefficient to match the coils for balanced voltages. It should work on higher turncount coils (for higher voltages, Stan mentions). Stan wrote about coil "voltage" coefficients also for the Re which makes the EPP possible. Meaning it works for different coils...
You say you have approx. 3000 wnd on each bobbin so you can tune the coils.
What is the WFC resistance at 20degC and what is the capacitance? Using the measurements from Don I calculated the max windings needed to get the winding ratio from the resistance. You already know the resistance of all the coils: 219.2 ohms and of your WFC at 20 degC. Which is (in my case) 208.8 ohms and 1.0574nF for a cell.
So the VIC is designed to match a 10 cell series load. (208.8 ohms * 10=2088 ohms) + (VIC resistance of 219.2) =2307.2ohms. So your |Zs| series is 2307.2ohms and a 10 cells series WFC has 105.74pF.Using this |Zs| 2307.2ohms and our primary |Zp| of (220//10.5)=10.02ohms and lets say Np=539wnd (30awg,10.5ohm) we get Ns=8166.18wnd (30awg) separated over three coils on the core. That's min. 2722.06wnd per coil!!!Looking at the LTSpice sim, the secondary coil is opposing the chokes and both chokes are aiding. When the secondary is aiding the chokes I could not get the voltage peaks balanced of the chokes. Also the secondary sets your voltage amplitudes of the chokes.
GPS was telling the dielectric (resistance) was changing from high to low only when the EPP is started. When the resistance (load) is lowered to a min. of the coils |z| which is 219.2ohms+ Re. 78.54 ohms is never possible. (78.54 is constant on a fixed temperature).
Looking at it as a resistance it is possible that the WFC load of 2088ohm (water) is going to be less and the voltage is rising. (see for yourself in the TLSpice sim, changing the WFC Re). Curve will get smaller and higher in amplitude.
What is still don't understand is if the WFC capacitance will change when the WFC resistance is changing due EPP. Result is the frequency will shift and the voltage will change. If this is the case the chokes equal but opposite voltages get out of balance.
My feeling is that this does not happen and only a fraction of the WFC capacitance is changing due ambient temperature and the Re will be less (not much due water inflow/outflow) and the voltage should go up.
~webmug
