Muller Dynamo

[crazycut06]

Quote from: crazycut06 on September 26, 2012, 02:24:43 PM
Is it a Zener diode? Just thinking?
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I've been thinking along those lines as well. A Zener diode would fit the bill but you would have to match the brakedown voltage to the sine's peak voltage to 'catch' the tip only and it would work well at certain RPM range.

lol, heck, maybe speed up happens when the normal generation reaches the breakover voltage of the zener.     This is a lot of good thoughts put together in a couple days. ;]  Its good to have 'some' direction and new things to try.

MaGs

I'm thinking if this diode has a relevance in this thread, or this is only for the speed under load thread?


Cc

[Magluvin]

Im going to try a few things with a single coil n rotor. Been thinking about it.

I generally approach a device that lays a claim, with the assumption that it does work and try to come up with reasons why it might work, instead of how it might be faked before I build it.

Was thinking about if the zener holds the peak for any period of time, and I think probably not long at all. Dont think there would be multiple shortings but more like a zener doing its job. But who knows. ;]  Ive been surprised many times.  maybe thats the 'advantage. over other types of switching tried. ;]

Now I suppose the first thing to do is try zeners across the working coils, as it is one possibility, and the simplest next step. Now if we used the zener on our outer winding used for shorting, the voltage generated across that coil will be much lower than the working coil, so low voltage zeners. But once shorted im sure good current would flow.

As someone stated earlier, zeners conduct both directions, one direction like a diode and the other at the zener voltage. So shorting in one phase of the magnet pass at what .7v and at the zener voltage in the other phase. This might be a very good assumption Im making here. ;]  Which way do we connect the diode?

My first idea is to have the .7v shorting in the first phase possibly to get the coil going and zener short the second phase.  But there may be a better reason for going the other way with it. Simple to try either way.

One thing I think is important is to be able to drive the rotor beyond any recommended speed up speeds so no body misses anything by not hitting an rpm level that may be higher for different builds.

Dunno if the speedup is due to the low and high shortings or resonance or what now. lol

The scope shot doesnt really indicate the shortings really. hmm. So I might doubt shorting of the working coil as spikes would be evident I might think. So possibly shorting an outer winding with fewer turns is, well, a possibility. lol



I wonder if a zener could be seen on any of the coil pics? 

Mags

[T-1000]

Thank you but I already did speed under load experiment... Sadly I lost the rotor it was turning a little bit fast...

If you swap generator coils from high current to high voltage in Mulller dynamo, the effect can be used straight away. Only one thing you need there - the step down high frequency transformers for getting low voltage and high current back.
Also if you change magnets from single to diual N+N-S+S setup (same poles of 2 magnets forced together) there will be even better effect.

Good luck!

[darkwanderer]

If you swap generator coils from high current to high voltage in Mulller dynamo, the effect can be used straight away. Only one thing you need there - the step down high frequency transformers for getting low voltage and high current back.
Also if you change magnets from single to diual N+N-S+S setup (same poles of 2 magnets forced together) there will be even better effect.

Good luck!

Yes that's right if you open the circuit quickly you'll get high voltage. But generator coils are not working like that in romero's setup because he's not using switching components at output. Only drive coils are working as you say. Also his drive coils can be upgraded for better performance...


For you N+N-S+S setup how will you drive the coils ? you must detect the north and south...

[T-1000]

Yes that's right if you open the circuit quickly you'll get high voltage. But generator coils are not working like that in romero's setup because he's not using switching components at output. Only drive coils are working as you say. Also his drive coils can be upgraded for better performance...


For you N+N-S+S setup how will you drive the coils ? you must detect the north and south...

Flip-flop driving circuit will do fine with hall sensors and diodes for driver feedback. Also this type of assembly will have conventional N-S type magnetic poles in result jus with one difference - the magnetic field will rise and fall with sharp triangle waveform.