Muller Dynamo

[conradelektro]

That's why I ordered those:

http://www.vxb.com/page/bearings/PROD/Kit7580
http://www.vxb.com/page/bearings/PROD/kit1002

They are very robust. I will have to clean the bearings and replace the oil inside because they have a little bit of friction, but they will endure the 20000rpm very easily.

Fausto.

@Fausto: I am also thinking about two flanged bearings (one on each stator plate), an axis and two flange blocks holding the disk on the axis (one block below the disk and one above). The axis could be turned down to 5 mm at one end to carry an encoder wheel.

One can get flanged bearings for a 10 mm axis and also blocks for a 10 mm axis. But a 12 mm axis as you suggest is also very good.

I also observed that the bearings for a 10 mm axis or thicker have quite a high friction.

(This way of mounting the disk was chosen for the "The Muller Mark II".)

Greetings, Conrad

[conradelektro]

http://www.youtube.com/watch?v=YYRVwIw0azo&feature=youtube_gdata_player

This is a simular replication . It seems to run very long time on this supercap.

My speculation:

The basic idea is to drive a disk with the "pulse motor principle" (because it needs little energy) and then to place many "generator coils" around the spinning disk (which carries magnets) to harvest electricity.

The principal speculation being that the "pulse motor principle" needs less electricity than can be harvested by generator coils.

If this is true in some way, many different designs are possible.

Greetings, Conrad

[SkyWatcher123]

Hi folks, Hi conrad, I'm using flange bearings and I had to remove the dust covers and clean out all the heavy grease in them to get them to spin freely. They are way better this way and spin for a long time.
peace love light
tyson

[electr0n]

Hi, someone mentioned rotor height adjustment earlier, heres what i did.
http://img860.imageshack.us/img860/9404/rrotorheightadj01.jpg
http://img829.imageshack.us/img829/8135/rassembled02.jpg
http://img848.imageshack.us/img848/6374/rassembled01.jpg
A s/steel bolt with the top machined to move the rotor shaft up and down.

Awesome work you guys, some amazing constructing/testing your doing

[Thaelin]

   Maiden motor run with one motor coil pair and one gen coil pair.

  Output is 13.5v after the FWBR. Coils are 3 strands of #30 for
300 turns for about 4.5 ohms total.

Found some D-FW79 SMC sensors that put out high going signal
and operate from 5v to 24v dc. Output voltage depends on input.
Triggers the Fet directly without additional circuit.

Soon as the tach gets here, will be able to give a rpm of it. Will
have all the coils and motor running then. Then I start the bias
part of it. Running right now in repulse mode but will switch when
ready

thay