Muller Dynamo

[chalamadad]

I dont think you even need a spining rotor.

Can you test with the rotor positioned to a fix place without spining and still have that effect with the load connected?

It would be very important now to measure better the input energy.

Hey Fausto,

yes, the oscillation occurs also when the rotor is standing still and one of it's magnets is above the coil. And yes, the effect is still there with a load connected.

So it might be possible to remove the rotor. But you know how sensitive these setups are. Once you lose a specific effect it can be impossible to restore it again if you don't remember the exact setup you had. As long as you don't know what is causing these effects you have to stay where you are and keep testing small things. And BTW - if it should really work one day it's half the show if there is no rotor spinning. 

Now if my theory is right, that the extra oscillations are induced into the other coils then it might be possible that we can hook them up in bucking mode and actually can pull power without slowing the rotor down. We had the discussion before but with this theory it is making sense logically.

Right now the oscillation effect does slow the rotor. But with a slower rotor the magnet is for a longer time above the coil so the oscillation pulses are longer also and there is hence more output. I think having it pulsed with a slow rotor is better than having it oscillate continuously because I imagine it to be more efficient on the input side. Of course for a practical use a solid state version would be gorgeous. But we are not anywhere close there yet.

My primary goal is a proof of concept demonstrator, showing the rotor turning and keeping the battery charged. Theoretically calculating the input and output power will not work. See, where I am now I am putting in about 16-20 Watts max (it's less but I am calculating worst case). Shorting the DC converter output is showing 4Amps times 12V is ~48 Watts. It sounds like COP>1 but that's not true because if I kept the output shorted the resonance effect vanishes. (Anybody - would it work to limit the output current by simply hooking up a resistor/pot in series?)

I'd be really happy to achieve a long-runner that is keeping the battery charged. Rotor speed I don't care. I tried the battery loop test today, also in solid state mode. 12V battery running the setup. Output was slightly lower. Maybe 10%. But the voltage of the battery was dropping quickly. We are close it seems but not quite there. When running with 16V it looks like the output is 40-50% higher but I just have a 12 battery. I might wanna try to repeat this time charge up the battery completely first.

Thanks for all the input, everyone! It's appreciated. Romero suggested to watch again his speed under load video and learn from that. And Fausto, thanks for keeping the forum clean every now and then. 

[chalamadad]

Well, i got my driving coil singing again and it gets realy hot.Not becouse it's singing, but becouse it's sucking a lot of current. In my case, the hall sits far way from the driving coil and the rotor must spin realy slow (15-20rpm).If i stop it completly the coil sings continuisly when the magnet faces the hall sensor.
I had 3 coils in my setup: one drivind and two pickup coils with no core.
I removed the two pickup coils and replace them with one coil with ferite core. In this case i couldn't make the driving coil sing again. I'll dig deeper

Hey marius,

wish I could help more on this but I don't exactly know why my setup does what it does. A few things:

- a backing magnet can change the sweet spot where the hall needs to be positioned, I have one under the singing coil
- I think we want to get the COIL to fire/unfire the hall. That will pulse it in it's own natural frequency. my guess is that this is the reason why the oscillations are so powerful that I can measure them without probes connected
- keep going, experimenting is the way to go!

[DeepCut]

If it's of any consequence biasing/backing/helper magnets work with my two setups (one is a rotor, the other is a single diametrically magnetised cylinder magnet) even though they are in a N/S configuration.

I find this surprising and don't have the knowledge to explain it ...

OUG replied and he is using 21 AWG on the primary and 30 AWG on the secondary.

All the best,

DC.

[geotrouvetout]

Hi all,

i am not a great writer on this forum and topic and did not post a lot, i follow all progress from the begining, trying some test without positives results, i have to test coil made of iron isolated wire (trying a mix between magnetic and electric field to get something different from a copper wired coil.)

@ chalamadad

nice and great work, but i think there is an error in the measurement interpretation

Shorting the DC converter output is showing 4Amps times 12V is ~48 Watts.

how can you get 12V if you short the output, maybe few mV (from the resistance of the short circuit and the shunt resistor of the ammeter) that give some mWatts instead of Watts !!!
May be i am wrong and i forgot something from your setup.

Geo.

[chalamadad]

Hi all,

i am not a great writer on this forum and topic and did not post a lot, i follow all progress from the begining, trying some test without positives results, i have to test coil made of iron isolated wire (trying a mix between magnetic and electric field to get something different from a copper wired coil.)

@ chalamadad

nice and great work, but i think there is an error in the measurement interpretation

how can you get 12V if you short the output, maybe few mV (from the resistance of the short circuit and the shunt resistor of the ammeter) that give some mWatts instead of Watts !!!
May be i am wrong and i forgot something from your setup.

Geo.

Yes I think you are correct, that's why I don't trust these calculations. Will have to measure over a resistor or something.