Muller Dynamo

[Sonedi]

I am sorry I had to log in with a new UN.

Just to tell you - its working and obviously really simple. Have a look at the diagram - only the right part. The trafo is your coil. Just put a cap in parallel with your single coil with about 3uF and instead of the CR1 you put a mosfet there - switched from a hall in syncron with the rotormags. Use very short interruptions. For CR2 you use two 4007 diod in parallel. On the output you have about 20000uF. And now you can see under load it speeds up and the output is tremendous. With the mags on the coils you get more amps. I got the idea from http://www.teslaco.com/technology.html
Now you have the out of phase manner and that's the solution.

[poynt99]

I did a small experiment today involving bifilar windings . Someone else posted a link to a website about this . I made 3 electromagnets using 3 similar iron cores . Each magnet used the same length of wire . One was wound normally , one bifilar and one quadrifilar .The same power supply was used to test each electromagnet in turn . The strength of each was tested by seeing how many small nails it would lift . The results were as follows .
Normall wind- 4nails .
Bifilar wound - 12 nails .
Quadrifilar ,12 nails .
    Note that each electromagnet had the same core and the same Amp-turns .I was surprised that quadrifilar was no better than bifilar . This experiment seems ridiculous , but you MUST do it yourself . The implication is that by using a bifilar motor coil , you could create the same input torque for a much lower electrical input , maybe as low as one third . Got to be worth a try? But do the simple experiment first .

neptune,

It would be of great benefit to know the supply current in each case. I think you will find that for case 2 and 3, the current is higher than in case one, and hence perhaps the advantage to case 2 or 3 is only evident when you are restricted to a lower supply voltage.

.99

[mikestocks2006]

@ Nulpoints , and also in reply to Pm from Mikestocks 2006 , 
  Bifilar in my case is as follows . Take 2 wires , A and B . Wind them "2in hand2 side by side . do not twist the wires together , and try to avoid crossed turns . All 3 electromagnets are wound single layer . Connect the start of wire a to the power supply . Connect the END of wire A to the START of wire B. Connect the connect the END of wire B to the power supply . So current flows from start of A to the end of A which is then connected to the start of B . The source makes no mention of the shape factor of the coil , but shows a similar arrangement to above . The nails I used were three-quarter inch upholstery tacks [tin tacks ]. Smaller nails would give a more accurate measurement , my tests were quick and dirty . If I can find the source I will edit it to this post shortly . You need to try it yourself .
Source:  WWW.tesla-coil-builder.com/bifilar_electromagnet.htp      I dont do links so you will have to type it .

Ok, so basically, each “layer” is progressively wound in the same direction along the axis of the core. E.g. if the core is positioned vertically, every “layer” is wound from bottom to top, then again bottom to top, instead of the normal bottom to top then top to  bottom etc.
Yes I think this was mentioned before. The current has an additional small additive component along the axis of the core instead of canceling.
Thanks
Mike

[nul-points]

@ Nulpoints
[...]
The nails I used were three-quarter inch upholstery tacks [tin tacks ]. Smaller nails would give a more accurate measurement , my tests were quick and dirty
[...]
Source:  WWW.tesla-coil-builder.com/bifilar_electromagnet.htp

thanks, neptune

ok, so you already used small nails (giving finer definition of power) - interesting about the bi - quad results, then

your normal/bifilar diff is better than quoted on the site - they say 'double', you got 3x

i wonder if the effect holds regardless of how many layers you divide the turns into

BTW the link you gave needs an .HTM extension, not .HTP

the 'fish pedicure' ad looks interesting (go on, admit it, you didn't know fish had feet) - maybe we could treat our hero to one for his next birthday? 

[neptune]

@Nul-points . Will you do us a favour and create a link please . Thanks . neptune .