Muller Dynamo

[Cherryman]

I believe someone said they were having trouble finding the DC-DC converter.  this one is 3 amp and while it has the name 'Vanson'  it looks the same and is on sale from Maplin for Euro buyers: Universal 3A DC Power Supply Was £21.99 Save £9.00 only £12.99
On promotion until 17/05/2011   here:
http://www.maplin.co.uk/universal-3a-dc-power-supply-228639

This website has a few options:

http://www.voltcraft.nl/notebook-netvoedingen#auto

[nul-points]

Hi Romero.

I've noticed from the schematic of your circuit that you are not directly taking advantage of the collapsing magnetic field of your drive coils when thay are in off mode.
[...]
I am very curious to know how this slight addition will affect your setup. Thanks in advance if you choose to experiment and report on the result.

Understanding, if not.

Cheers from Hoptoad ..... KneeDeep

hi Hoptoad

if Romero hasn't already tried this but doesn't wish to, i'm intending to include feedback of coil-collapse energy in my build attempt, although in my case i'm planning to feedback to the buffer cap - so you should get a report back from someone 

cheers
np

http://docsfreelunch.blogspot.com

[e2matrix]

Either you are replicating OR you are up-scaling and using bigger better coils and magnets. In which case get the best Schottky diodes you can afford. Excess amps now wont go a miss later. With 10A diodes in a bridge you got like an easy 50w per coil with 10 very large generator coils collectively 500w system.

Is this what you are building?

Also one other point. Once you built this some of you will want to use coil shorting to give an extreme boost of power and volts. You get 300-400v when the coil is shorted. If you plan on doing this you need like 500v diodes. At 350v and 0.5 amp you now have 175 watt per coil = 1.7Kw system. No its not too far fetched the wind power guys make these muller style systems at that power rating.

bolt, hoptoad and nul-points,  Thanks all for your help!  I was not clear on the threshold rating but knew high amp regular diodes have bigger losses.  Now I've got a much better picture and it sounds like going for a higher rating is the best idea especially if I end up scaling up.  Not real sure what I'm doing at this time but will be happy with any OU replication and go from there.  I tend to have an open design philosophy that  develops itself with the ebb and flow of ideas and play $$ available  

[toranarod]

while we are on the subject of coils
I have a come up with this. here is a 15 mm litz wire coil on a ferrite former.
what is the inductance of the coils in RomeroUK motor? any body have even a close idea?

has any body wound a coil?

[bolt]

This website has a few options:

http://www.voltcraft.nl/notebook-netvoedingen#auto

Look on ebay for universal 12v car adaptor they are sold from China all over the world!

Its just a switch mode PSU just pick one with a voltage selector and good wattage.