Muller Dynamo

[woopy]

Hi Tudi  Nul-Poits and all

perhaps this can help

http://www.youtube.com/watch?v=zdzgRE4xlN0

Good luck at all

Laurent

[nul-points]

Hi Tudi  Nul-Poits and all

perhaps this can help

http://www.youtube.com/watch?v=zdzgRE4xlN0

Good luck at all

Laurent

thanks for doing that test Laurent - fascinating to 'see' the field fluctuating around each core

so far, in the thread, we've tended to concentrate on the vertical effect of the field as the rotor mags pass through the Gen coil-pair gaps

your test, however, shows that there is significant horizontal fluctuation around the core also, which must all add to the overall induction in the coils

the magnetic viewing material only gives a certain level of detail - and of course, it didn't cover the whole circle of the cores - so it wasn't easy to see anything of this 'travelling wave' of magnetic alignment

it would be interesting to view the device again later, possibly driven at slow speed, and with the stator mags in place (if they don't overwhelm the viewing material)

thanks again
np


http://docsfreelunch.blogspot.com

[conradelektro]

Nice way to auto-balance a rotor is a trick I learned from dismanteling a PC CD-DVD -drive.
Sony patented a very simpel auto-balancer that is often mounted in a clamping mechanism of a PC CD drive, due to the high speed recording options these drive have (up to 10.000 rpm and higher!)

The construction basically consists of a hollow track centric to the rotation axis that is filled with metal balls. The track is only filled partially.

If this is mounted on a unbalanced rotor the balls will tangentially position itself such that unbalance is compensated when rotating.

@teslaalset: thank you for posting this great idea, since I long time I try to balance my pulse motors (which make tremendous noise and seem to fly appart).

This is why I like this forum, one always learns about great ideas which would be hard to find otherwise.

[Bruce_TPU]

Hello All,

If you look carefully at Laurents paper template, of course you see that ONLY 1 magnet is over any given coil at any ONE time....

So, how does that help us?  Now, I have been thinking about this for sometime and playing with my own little rotor, and I would like you to consider the workings of the magnetic fields as I describe them...

With the B field of the COIL in attraction, initially, to the rotor magnet, and the inner ferrite biased with magnets, in repulsion to the rotor magnet in the CENTER of the coil, if it is biased correctly, if will for a bloch wall for an instant of time, that is toroidally shaped, around the bloch wall, that will neither be in attraction nor repulsion, but is simply a bloch wall.....

NOW, as lenz takes effect, and the B field goes from attraction to repulsion, it JOINS the flux, for an added boost, from the center ferrite biased piece, and repels the rotor magnet away with 1+1 repulsion.  One magnet then goes to another bloch wall, and the cycle continues.

To me, to tune each coil, one at a time, underload, (the rest of the coils would not have a load) and while biasing the ferrite with weak magnets, look for the least amount of power draw to the two pulse coils.  I would then call this the "sweet spot", or where the bloch wall is the best, and the 1+1 boost is also the best.  This can only be seen as you watch the power input side, tuning 1 coil at a time.  As we know, not all magnet are created equal, and some coils may require more ceramics, etc, to find that sweet spot then others.

This is my suggestion and how I am going to be tuning, when I get to that point, with my own little setup..

Cheers,

Bruce

[David70]

Romero had a picture posted then he removed it. Looks very similar with what Bruce is doing.
I managed to save it to the computer before was removed.