Muller Dynamo

[nul-points]

[...]
Fixing a disk to this DC-motor also solves my "bearings" and "sensor" concerns (no extra bearings, they are in the DC-motor, and no sensors).
[...]
For harvesting the electricity from the generator coil pairs I will do as Romero did (independent full bridge rectifiers).

For closing the loop I have no idea yet, we will see, may be a 3 Volt Zener diode to clamp excess voltage down to 3 Volt (instead of the DC-DC converter Romeo used).

It will take some time, but at least I now have a plan (suitable to my skills and the stuff I already have).

Greetings, Conrad

hi Conrad

i decided on the same route for similar reasons

i have a rotor made, Neos loaded & running up with a 3V DC motor (with claimed 80% approx Eff. at 1A)

drawing 1.6A at start, then dropping to approx 0.9A, using two AAA primary batteries for a trial run-up

i'm going for a smaller physical build, though - 12cm Diam rotor, 6 mags, 7 coils

similar idea on replacing DC converter, using LEDs as both load & regulation

i don't have access to a good toolset, and my mech skills pretty poor, so struggling to arrange a robust motor block within limited space amongst coils at the moment! (quite strong motor vibration due to rotor imperfections)

next steps for me are to get stator plates cut out & mounted on a base with motor, wind a trial coil pair to get an idea of min turns required, then make an initial 2 coil pair + FWBR + Cap test to observe relative action of single & double coil/FWBR operation (with all cores + stator mags in place to give worst case load, before tuning full system later)


WRT your points 1) & 2) above:

Romero reported preliminary results elsewhere, before releasing the looped and self-run videos, which indicated that before adding any stator magnets, he had achieved approx 105% Eff.

Adding stator magnets to 5 coil positions took him to approx 200% Eff.

so the bulk of the OU is either due to anti-cogging reducing drag, or to some intensive flux interaction between the rotor mags and the mag-biased stator coil/core assemblies


glad to see another 'DC motor' builder - good luck with the build!
np


http://docsfreelunch.blogspot.com
 

[lumen]

Everyone seems to be overly concerned with the drive coils, trying to build something to be highly efficient, but the device Romero showed had an abundance of excess energy and some loss should not be a problem.

If it is difficult to get the generator side to output this excess energy then doesn't this appear like a red flag?
Not trying to be negative but first things first.

[David70]

I have done a test using only one set of two coils to collect the power and only one coil set to drive  the rotor. I can get 16.1v ac without the magnets on top but having the magnets in repulsion I get 19.3v ac. Looks that the magnets are adding some power and reduces some of the drag.I need to do all other coils now.Each coil I have is 450 turns single 23awg

[scratchrobot]

hi Scratchrobot

your rig sounds really great! it really screams...very nice...

Looks good too except for that rotor eh...I bet you could cut the draw in half if you could get better airgap clearance between rotor magnets and cores liek 1.5mm....looks around 7 or 8mm or so right now judging from the video.

since its made of MDF (I assume rotor too) I would suggest using felt pen, and mark on rotor as it spins, a band on the outisde rim of rotor, so you can see exaclty where the rotor's "center-of-rim" or "centerline" is.....

then pop magnets out, and belt-sand that MDF rotor down and get out the wobble-ness...using the felt-pen marking as guide.
you dont have to get it perfect, but if you make the rotor thinner, letting the matgnet stick out a bit,  then you can play with each  magnet moving them up or down in rotor, until the magnets thenselves have the the perfect airgap and if rotor is little bit wobbly doesnt matter the magnets will be perfect....

anyways looks cool and goes great...i agree with bolt yours is going to be a looper judging by the way it goes already.

You are right the gap is too big and varies because of the wobble. Thank you for the good tips, i will try them. Today i tried with magnets and a small bulb as load on one coil, now it doesn't scream anymore but sounds more like a generator 

[FreeEnergyInfo]

I think that RomeroUK has really luck with his timing.
It is not better to use a simple light sensor (forked light barrier and a little hole, instead of hall sensor) and a simple electronic to control delay, width and height of the pulse?

VIEV ....