Muller Dynamo

[pinkyjee]

I’ll definitely be updating the forum with any news on the outcome.

[mariuscivic]

Hi guys!
I made another video; maybe someone has a better explanation for this
http://www.youtube.com/watch?v=OhWVBpPGO1M

[chalamadad]

Hey everyone,

I've been experimenting with driver coil shorting lately. In my current setup I have just one driver coil hooked up to my arduino controlled mosfet driving circuit. In a range between 11 and 14 volts I can remove the hall sensor completely and the driving coil would oscillate rapidly on it's own continuously without being pulsed. It makes a high and loud beeping/ringing sound (almost crying), indicating the audible oscillation frequency.

The input amps is rising and the coil is getting really hot. I just hooked up a diode to the coil and almost burned it up. It seems to be pulling a lot of current in this state.

Reducing input voltage below 11 volts and the effect is gone. My strong guess is that this is ferroresonance. Core material is iron powder.

Here is a (bad) screenshot showing the continuous oscillation:

[Magluvin]

Hey Marius

Very cool on adding the second bulb and getting the increase.
;]

Here is a question most should want an answer too....

Set it up the way you have in the video, where it speeds up very high when shorted.....

Measure the starting speed (no short)

Measure the top speed (coil shorted)

Then while at high speed, and coil is shorted, physically remove the shorted coil away from the rotor.

If when you do this, the speed goes down, then you have something big.  ;]

This will show if the coil helps the rotor achieve a higher speed than when the coil is not present.

So if its faster with the shorted coil than without the coil being near the rotor, then you need to add more shorted coils around the rotor.
Will it go faster?
Will there be a point that you can remove the drive coil and the rotor goes on by itself?  ;]

Good work your doing and thanks for showing.  I have not been able to get the shorted speedup yet.  Im hitting the rpms that you guys are, but maybe I need more for my particular setup and Im missing out on all the fun.  ;]


Mags

[Magluvin]

Was just looking at my rotor.   I have 8 mags, but 16 holes. Maybe if I load them all up, I wont have to get the rpms too high because of more pulses per rotation. Higher freq to the coil but less rotation.  ;]

Just something to think about.

Mags