using falstad sim, i found that adjusting the ratio of the secondary a tad and using an active switch to connect it in parallel gives a good result in changing, reducing the inductance. with equal turns ratio, there was no change. just shorting the sec caused a drastic change, reduction in the primary inductance. adding resistance to the sec shorting switch loop kills off the oscillation quickly...
so ill try some stuff and see how it goes.
(09-25-2024, 09:19 PM)dd_alf Wrote: Such a trumpet form I get whenever I mix 2 similar frequencies. Then they frequently build up a standing wave that looks like a trumpet. Eg. using a bifilar primary.
Hi dd, did you get some excess energy from it?
Andy
What is principle of Kunel patent? Switching magnetic flux and created induction because of it ?
No one was able to replicate this and get some usefull energy out of it.
My wild guess:
It is about parametric resonance created by changing inductance in the circuit. Switching of the flux, as described in patent, is a way to change inductance in LC tank circuit - not to induce current!
By periodically driving the inductor into and out of saturation using an external magnetic field or current, you effectively vary its inductance.
Like in this video. But Kunel made it solid state.
What is principle of Kunel patent? Switching magnetic flux and created induction because of it ?
No one was able to replicate this and get some usefull energy out of it.
My wild guess:
It is about parametric resonance created by changing inductance in the circuit. Switching of the flux, as described in patent, is a way to change inductance in LC tank circuit - not to induce current!
By periodically driving the inductor into and out of saturation using an external magnetic field or current, you effectively vary its inductance.
Like in this video. But Kunel made it solid state.
i like where you are going with this.. when an inductor or transformer becomes saturated, the inductance value goes down, correct?. ive been under the impression that the induction value needs to be higher when getting close to saturation. if it were like you say, then we might be all experiencing parametric oscilations of an LC circuit by applying a large enough pulse to get the inductor into saturation. id think many would have encountered that over the years.
perhaps in don smiths case, the opposing windings on his large coils is where the inductance change occurs. maybe the 2 windings are not opposing? i dont believe he had cores in there...
something about falstad sim. should be able to charge a cap, disconnect input, then change the capacitance and see a voltage change. i would think. varying capacitance or the inductance of an lc in oscillation does show the parametric effect, but so far havnt been able to get a self runner on sim so far. there may need to be a gradual variation rather than just switching from low to high values.
many things cannot be done in sims, most likely all of them. like Teslas extra coil, tail... i wonder how that may affect the inductance of the main coil while in operation...
(Yesterday, 11:50 PM)magluvin Wrote: here is something interesting along the lins of changing inductance.
mags
Probably if winding II. is part of LC tank circuit, then winding I. helps to change inductance in winding II. (through the core) and oscillations in LC tank circuit can grow.
After oscillations reach specific level, then it is discharge through the spark gap into output transformer. This dicharge should not affect oscillations. Maybe instead of sparg gap it could be SCR (thyristor).
