Shorting coil gives back more power

[popolibero]

Btw, I have tried again to increase the shortings per peak, again playing with duty cycle as well. The circuit works well and clean, still, I'm positive that the result is that one spike charges more than multiple spikes. Also looking at the signal without output capacitor, One shorting creates one big spike plus ringings, while multiple shortings give more spikes but with less amplitude. The more shortings the smaller the amplitude gets.

Mario

[giantkiller]

@Popolibero,
can you post a schematic of the shorting schematic?

[Feynman]

The iron core lowers the C.O.P. Better to have air or copper.

@GK

I agree 'air core' might be better for the devices being discussed, ie. these electromagnet style 'coil shorting' devices, but what about a Boyce TPU?  That uses a powdered iron core with somewhat intermediate permeability 'u' to mix precisely controlled pwm square waves , square waves of 60V potential and of <10% duty cycle (realistically like 1-2% duty cycle) with precise phase control. 

Like bolt says, a TPU -- whether it's a Boyce TPU or a SM TPU, both have COP of >1000.  So does Floyd Sweet VTA.   These 'coil shorting' devices have a COP 1 to 2 orders of magnitude lower (COP=2-3, COP=10, etc).    (Here is where I'd be curious to know the COP of the 5kW device of which bolt posted photographs).   In any case, I'd be careful to say they all have common mechanism of action.  Even the SM TPU and Boyce TPU might have a different mechanism of action.

I'm not convinced that it's the same mechanism of action between the TPU devices and these 'coil shorting' devices.   But that's just my personal opinion at the moment. 

The only thing all these devices have in common seems to be the modulation of magnetic flux.

Anyway I'm off to do inventory of my parts and organize them.  Good luck this weekend GK and anyone else on the bench.

P.S.
Regardless , we need to get an open-source ,easily-replicable COP>1 device (even if it's just COP=1.5).  That way it will spread virally and we can publish PDF instructions on how to replicate.  It will be especially useful if it's a self-runner without battery banks (capacitors instead) , and if the parts cost less than $100, and if it's entirely solid-state.

[popolibero]

GK, I don't have the full schematic on paper and am at work anyway, but the shorting basis you can see here:

https://sites.google.com/site/alternativeworldenergy/shorting-coils-circuits

On my rotor setup I used halls, now that I'm using solid state (if you go back a few pages I explained in detail what I'm doing) I use a 555 circuit both to drive the setup and short the generator coil since the impulse happens to be at the same time. I posted my basic 555 circuit a couple pages back, although others have posted other circuits as well. I use that circuit to drive both the drive and shorting fets.

Mario

[popolibero]

I agree that shorting might have a lower COP, but if you make the magnetic field you're shorting very strong with neos you'll get a hell of a bang I'd say.

Mario