Shorting coil gives back more power

[giantkiller]

A higher complex attempt at simplicity

@yssuraxu_,
I see what you are saying about the low windings. I was looking at it from a high current draw and not the collapse specs you mentioned. Thanks.

I have a spool of Litz to put in the configuration.

[popolibero]

Well, strongly disagree too. If you need to create a certain strength of magnetic field with a coil in this application to work with certain permanent magnets, you can get it with low volt high amps and low impedance coil, OR you can get the same with higher volts lower amps higher impedance coil. With the second you'll loose less through the diodes. This is simple electromagnetics.
A UF5408 is an even better diode.

Mario

[yssuraxu_697]

Can you explain this to me why this is bad in more detail.  1 ohm is pretty low resistance, so you are talking fractions of an ohm being necessary?

Yep. Fractions. You want your system to have have capability of almost instantly bulding up large current. Just think about shorting the lets say 5uF 220V cap. Screwdriver = proper mini-EMP. Couple of your average thin connection wires with alligators - little sparkie if any.

Currently I'm having huge success with pulse motor drive module following these principles. It already works starting at slightly below 0.1V input. That should speak for itself (using classical approach absolute minimum was 1V). At for example 16V it has superb mechanical output AND very little average current usage. How does this click with LV/HC windings? It is driven by mini-EMP bursts that last only a fraction of "normal" cycle and in additon to that most of the flyback gets recycled.

[yssuraxu_697]

If you need to create a certain strength of magnetic field with a coil in this application to work with certain permanent magnets,

Dynamic characteristics of HV/LC coil you propose are not acceptable for current application because coil is not usable at HF.
LV/HC coil topology I propose is perfectly adequate for HF. The strength is given in form of EMP.

Nothing personal Just the truth.

Edit: UF4007 is just an example and I found it to give most output when rectifying shorted coil output with diodes at hand @ ~200V. It is absolutely not suitable for LV/HC part of the circuit, unless you have very tiny setup and/or 1V drop is not a problem.

[popolibero]

What I wrote is actually more for conventional trafo stuff. You're right that in this application we'd still want a low ohm/impedance coil, else we loose too much in the collapse. In this case taking advantage of higher volts thus less loss because of diode drops is still suitable. The only difference is that at higher voltage we have to increase the frequency (thus switch ON time) for same results. So we would end up with the same setup driven at say 100V instead of 12, and also a high voltage load, but the whole thing driven at a higher frequency. This would be more efficient than a 12V system.